GRANT VTXOMWH16-21 Vortex Eco Wall Hung Instruction Manual
- June 1, 2024
- GRANT
Table of Contents
VTXOMWH16-21 Vortex Eco Wall Hung
“`html
Specifications
-
Product Name: Grant Vortex Eco Wall Hung External and Wall Hung
External System Condensing Oil Boiler Range -
Product Code: VTXOMWH16/21, VTXSOMWH16/21
-
Fuel Type: Suitable for use with Class C2 Kerosene
-
Serial Number Identifier: 764, 766
Product Usage Instructions
1. Introduction
1.1 How a Condensing Boiler Operates: Lorem
ipsum dolor sit amet, consectetur adipiscing elit. Proin eget ante
vel nunc feugiat aliquet.
1.2 Boiler Description: Nulla facilisi. Integer
in dui eget velit ultricies tincidunt. Quisque nec nibh nec nisi
ultrices lacinia.
1.3 Flue Options: Sed malesuada ante sit amet
justo malesuada, at semper nisi sagittis.
1.4 Boiler Components: Fusce auctor, purus eget
fermentum egestas, felis sapien tincidunt lorem.
2. Technical Data
2.1 Boiler Technical Data: Vivamus eget est nec
leo pharetra rhoncus.
2.2 Sealed System Data: Donec cursus, felis sit
amet volutpat semper, odio arcu efficitur libero.
2.3 Burner Settings: Etiam auctor erat ac
gravida vestibulum.
2.4 Flue Gas Analysis: Nunc ac diam nec eros
rutrum scelerisque.
2.5 Water Connections: Aenean in magna nec enim
consectetur sagittis.
2.6 Boiler Dimensions: Maecenas in ex eget
metus varius fringilla.
3. Oil Storage and Supply System
3.1 Fuel Supply: Curabitur ut mauris et nunc
posuere vestibulum.
3.2 Burner Oil Connection: Nam maximus nisl et
neque sagittis, sed tempor nisl lacinia.
4. Installation
4.1 Introduction: Duis fermentum augue at eros
fringilla, vitae gravida ex tempus.
4.2 Boiler Location: Ut auctor turpis a velit
tincidunt, eget scelerisque nisi aliquam.
4.3 Regulations Compliance: Phasellus varius
purus ut metus cursus, nec auctor nisi mollis.
4.4 Heating System Design Considerations:
Integer euismod purus vel lectus molestie, ut hendrerit libero
consequat.
4.5 Pipework Materials: Suspendisse potenti.
Mauris vel ipsum nec turpis ultrices euismod.
4.6 Connections: Nullam non neque at nisl
pulvinar tincidunt.
4.7 Preparation for Installation: Vestibulum
sit amet mauris vel tortor bibendum interdum.
4.8 Dismantling the Boiler: Integer id elit sed
diam ornare posuere.
4.9 Installing the Boiler: Sed ultricies justo
eget dapibus aliquet.
4.10 Filling the Heating System: Proin auctor
risus at urna accumsan, id ornare mi efficitur.
4.11 Before You Commission: Fusce scelerisque
tellus ut sapien ullamcorper, at vehicula odio convallis.
Frequently Asked Questions (FAQ)
Q: How often should the boiler be serviced?
A: The boiler should be serviced at least every
twelve months, and the details should be entered in the Service Log
in the user handbook.
Q: What fuel types are suitable for Grant Vortex boilers?
A: All Grant Vortex boilers are suitable for
use with Class C2 Kerosene. The use of Class D Gas Oil on specific
models is not recommended due to non-compliance with
regulations.
Q: Can the boiler operate on Bio-Fuel?
A: Yes, the appliance can operate on
Bio-Kerosene (B30K) with proper reference to the provided
information in the manual.
“`
Grant Vortex Eco
Wall Hung External and Wall Hung External System Condensing Oil Boiler Range
Installation and Servicing Instructions
UK | DOC 0127 | Rev 3.1 | March 2024
IMPORTANT NOTE FOR INSTALLERS
These instructions are intended to guide installers on the installation,
commissioning and servicing of the Grant Vortex oil boiler. After installing
the boiler, leave these instructions with the user. A user handbook is
available to guide users in the operation of the oil boiler.
SPECIAL TEXT FORMATS
The following special text formats are used in these instructions for the
purposes listed below:
! WARNING !
Warning of possible human injury as a consequence of not following the
instructions in the warning.
! CAUTION !
Caution concerning likely damage to equipment or tools as a consequence of not
following the instructions in the caution.
! NOTE !
Used for emphasis or information not directly concerned with the surrounding
text but of importance to the reader.
PRODUCT CODES AND SERIAL NUMBERS COVERED
The serial numbers used on Grant oil boilers consist of a fifteen digit
numerical code with the final three digits being the product identifier.
For example:
100000200218764
These instructions cover the following product codes and serial numbers:
Product code VTXOMWH16/21 VTXSOMWH16/21
Serial number identifier 764 766
SERVICING
The boiler should be serviced at least every twelve months and the details
entered in the Service Log in the user handbook.
FUEL TYPE
All Grant Vortex boilers are suitable for use with Class C2 Kerosene. The use
of Class D Gas Oil on all Grant Vortex Low NOx and Blue Flame boilers DOES NOT
comply with ErP requirements or EU regulations, and as a result Grant UK does
not condone its use. To use Bio-Kerosene (B30K), refer to the information
below:
OPERATION ON BIO-FUEL
All Grant Vortex condensing boilers manufactured since May 2011 are suitable
for operation on both standard Kerosene (Class C2 to BS 2869) and also bio-
kerosene – up to a 30% blend (B30K). All burner settings and nozzle sizes (as
detailed in Section 2.3 of these instructions) are correct for both standard
kerosene and biokerosene (B30K). In order to operate this boiler on bio-
kerosene, it will be necessary to take the following actions: · Use a bio-
kerosene (B30K) compatible flexible oil line in
place of the oil line supplied with the boiler. · Have the oil storage tank
and oil supply line (including all
pipework, sight gauges, filters, isolating valves, fire valves, de-aeration
devices, etc.) checked for their compatibility with bio-kerosene (B30K). Where
necessary, some or all of these items may have to be replaced with a bio-
kerosene compatible alternative. · Check the suitability of the flue system
with Grant UK. · Use only bio-kerosene (B30K) that conforms to OPS24.
IMPORTANT: Under no circumstances, should the boiler be used with bio-kerosene
without the above actions being taken first.
! NOTE !
This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience
and knowledge if they have been given supervision or instruction concerning
use of the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without
supervision.
GRANT ENGINEERING (UK) LIMITED Frankland Road, Blagrove Industrial Estate,
Swindon, SN5 8YG Tel: +44 (0)1380 736920 Fax: +44 (0)1380 736991 Email:
info@grantuk.com www.grantuk.com
This manual is accurate at the date of printing but will be superseded and
should be disregarded if specifications and/or appearances are changed in the
interests of continued product improvement. However, no responsibility of any
kind for any injury, death, loss, damage or delay however caused resulting
from the use of this manual can be accepted by Grant Engineering (UK) Limited,
the author or others involved in its publication. All good sold are subject to
our official Conditions of Sale, a copy of which may be obtained on
application. © Grant Engineering (UK) Limited. No part of this manual may be
reproduced by any means without prior written consent.
Page 2
CONTENTS
1
INTRODUCTION
4
1.1
How a condensing boiler operates 4
1.2
Boiler description
4
1.3
Flue options
4
1.4
Boiler components
5
2
TECHNICAL DATA
6
2.1
Boiler technical data
6
2.2
Sealed system data
6
2.3
Burner settings
7
2.4
Flue gas analysis
7
2.5
Water connections
7
2.6
Boiler dimensions
8
3
OIL STORAGE AND SUPPLY SYSTEM 9
3.1
Fuel supply
9
3.2
Burner oil connection
11
4
INSTALLATION
12
4.1
Introduction
12
4.2
Boiler location
12
4.3
Regulations compliance
12
4.4
Heating system design
considerations
12
4.5
Pipework materials
13
4.6
Connections
13
4.7
Preparation for installation
13
4.8
Dismantling the boiler
13
4.9
Installing the boiler
15
4.10 Filling the heating system
16
4.11 Before you commission
16
4.12 Completion
16
5
PIPE CONNECTIONS
17
5.1
Water connections
17
5.2
Water connections – system models 17
6
CONDENSATE DISPOSAL
18
6.1
General requirements
18
6.2
Connections
18
6.3
Pipework
18
6.4
External pipework
18
6.5
Condensate soakaway
19
6.6
Condensate trap
19
6.7
Condensate disposal pipework
20
6.8
Inspection and cleaning of trap
20
7
SEALED SYSTEMS
21
7.1
Sealed system requirements
21
7.2
Filling the sealed system
22
7.3
Venting the pump
22
7.4
Pressure relief (safety) valve
operation
22
7.5
System models
23
8
ELECTRICAL
24
8.1
General
24
8.2
Connecting the power supply
24
8.3
Frost protection
25
8.4
Control system wiring diagrams
26
8.5
Boiler control panel wiring diagrams 28
9
FLUE SYSTEM AND AIR SUPPLY
29
9.1
Air supply
29
9.2
Conventional flue systems
29
9.3
External conventional flue
(green system)
29
9.4
Flue clearances
31
10
COMMISSIONING
33
10.1 Before switching on
34
10.2 Burner settings
34
10.3 Switching on
35
10.4 Running the boiler
36
10.5 Balancing the system
36
10.6 Completion
36
10.7 Information for the user
36
11
SERVICING
37
11.1 Checks before servicing
37
11.2 Dismantling prior to servicing
37
11.3 Cleaning the boiler
38
11.4 Cleaning the burner
38
11.5 Cleaning the burner:
Other components
39
11.6 Recommissioning
39
11.7 Burner components
40
12
FAULT FINDING
41
12.1 Boiler fault finding
41
12.2 Burner fault finding charts
42
13
SPARE PARTS
45
13.1 Boiler parts list
45
13.2 Sealed system parts list
45
13.3 Ecoflam Max 1 LN Burner
46
14
DECLARATION OF CONFORMITY
48
15
HEALTH AND SAFETY INFORMATION 49
15.1 Insulation materials
49
15.2 Sealant and adhesive
49
15.3 Kerosene and Gas Oil fuels
49
16
END OF LIFE INFORMATION
50
17
PRODUCT FICHE
51
18
GUARANTEE
52
A1
WILO-PARA 25-130/7-50/SC-6#GRA
CIRCULATING PUMP
54
Contents
Page 3
1 INTRODUCTION
1.1 HOW A CONDENSING BOILER OPERATES
During the combustion process, hydrogen and oxygen combine to produce heat and
water vapour. The water vapour produced is in the form of superheated steam in
the heat exchanger. This superheated steam contains sensible heat (available
heat) and latent heat (heat locked up in the flue gas). A conventional boiler
cannot recover any of the latent heat and this energy is lost to the
atmosphere through the flue.
The Grant Vortex condensing boiler contains an extra heat exchanger which is
designed to recover the latent heat normally lost by a conventional boiler. It
does this by cooling the flue gases to below 90°C, thus extracting more
sensible heat and some of the latent heat. This is achieved by cooling the
flue gases to their dew point (approximately 55°C).
To ensure maximum efficiency, the boiler return temperature should be 55°C or
less, this will enable the latent heat to be condensed out of the flue gases.
· The boiler will achieve net thermal efficiencies of 100%.
To achieve maximum performance from the Grant Vortex boiler, it is recommended
that the heating system is designed so that a temperature differential of 20°C
between the flow and return is maintained.
The Grant Vortex boiler will however still operate at extremely high
efficiencies even when it is not in condensing mode and therefore is suitable
for fitting to an existing heating system without alteration to the radiator
sizes. The boiler is capable of a maximum flow temperature of 75°C.
1.2 BOILER DESCRIPTION
The Grant Vortex Eco external modules have an insulated waterproof enclosure
made of galvanised steel with a powder coated finish and are designed for
external installation, mounted on a suitable external wall.
The Grant Vortex Eco Wall Hung range of automatic pressure jet oil boilers
have been designed for use with a fully pumped central heating system with
indirect domestic hot water cylinder.
They are not suitable for use with either a direct cylinder or a `primatic’
cylinder or gravity hot water.
The boilers are suitable for use on open vented or sealed central heating
systems. System models are supplied with the necessary components factory
fitted. Refer to Section 7.
All boilers are supplied with the control panel and burner factory fitted.
The boilers are supplied with a flue terminal but can be connected to a
conventional flue system.
All the models in the current Grant Vortex Eco range of boilers are designed
to comply with the maximum NOx emissions* under the Energy-related Products
Directive (ErP).
- From the 26th September 2018, the maximum NOx emissions for all new oil fired boilers (up to and including 400kW for both new build and replacement boiler installations) is 120mg/kWh.
1.3 FLUE OPTIONS
Grant Vortex Eco External Wall Hung boilers are supplied with a 45°
conventional flue terminal (see Figure 1-1). There is one flue outlet position
on these boilers, directly on top of the module (see Figure 2-1). The terminal
can be rotated to direct the plume in the desired direction.
It is possible to discharge the products of combustion at a higher level by
using the following components from the Grant `Green’ flue system: · External
module starter (available as a straight section only
on the External Wall Hung boilers)
· Fixed extensions 150mm, 250mm, 450mm and 950mm · Adjustable extension 195 to
270mm · 45° elbow · High level 90° or vertical terminal It is possible to
extend the flue system by 19m vertically (from the boiler outlet) using this
system.
Please note, the flue may only be brought up vertically from Grant Vortex Eco
External Wall Hung boilers.
Please refer to Sections 4.9 and 9 for more detailed instructions on how to
install the flue system. Conventional flues only may be fitted to Grant Vortex
Eco External boilers.
! NOTE !
The flue system materials and construction MUST be suitable for use with oil-
fired condensing boilers. Failure to fit a suitable conventional flue may
invalidate the guarantee on the boiler.
Page 4
Section 1: Introduction
1.4 BOILER COMPONENTS
All burners are pre-set for use with kerosene and are supplied ready to
connect to a two pipe fuel supply system with a two flexible fuel lines and
3/8 to 1/4 BSP male adaptor supplied with the boiler. Please refer to Section
3 for further details.
The temperature of the water leaving the boiler to heat the radiators and hot
water cylinder is user adjustable.
The boiler is fitted with an overheat thermostat (which allows it to be used
on a sealed central heating system) which will automatically switch off the
boiler if the heat exchanger exceeds a pre-set temperature of 110°C ± 3°C.
The control panel is fitted with an ON/OFF switch, boiler thermostat control
knob and the manual reset button for the overheat thermostat.
To access the controls, remove the front door from the boiler.
Turn the knob at the bottom of the front door anticlockwise and pull the door
outwards at the bottom. Carefully release the top of the front door panel from
under the top casing panel flange and remove it from the boiler to reveal the
boiler as shown in Figure 1-1.
Figure 1-2 shows the details of the control panel.
1.4.1 BOILER CONTROLS
To access the control panel, remove the front door panel from the boiler. The
controls on the panel are as follows:
Boiler On/Off switch This switches the boiler on and off. The boiler ON/OFF
switch incorporates a mains on’ neon which lights when the boiler is switched on. Please note that the
mains on’ neon does not necessarily indicate that
the burner is firing.
! NOTE !
If the ON/OFF switch is set to off the boiler will NOT supply central heating
or heat domestic hot water (if a hot water cylinder is connected to the
boiler). The built-in frost thermostat will also not operate.
Service/Test Switch (External Modules only) A Service switch is fitted to the
control panel to allow the Service Engineer to test-fire the boiler. Heating
Thermostat This control allows the temperature of the water leaving the boiler
to heat the radiators (and domestic hot water) to be adjusted. This will be
set by the installer to the optimum temperature for efficient operation of the
boiler. It should be left set in this position.
Overheat Thermostat (Overheat Reset) The boiler is fitted with a safety
overheat thermostat which will automatically switch off the boiler in the case
of a control malfunction causing overheating.
System Pressure Gauge (System models only)
This is to indicate the water pressure in the sealed heating system.
Figure 1-1: Boiler with front panel removed
Section 1: Introduction
Figure 1-2: Boiler controls
Page 5
2 TECHNICAL DATA
2.1 BOILER TECHNICAL DATA
Table 2-1: Boiler technical data
Units
litre Water content
gal
kg Weight – complete boiler (dry)
lb
kg Weight – boiler shell only (dry)*
lb
Maximum heat output (Kerosene)
kW Btu/h
Minimum flow rate (T=10°C)
l/h
Minimum flow rate (T=20°C)
l/h
Condensate connection
Flue diameter (conventional)
mm
Waterside resistance T=10°C
mbar
Waterside resistance T=20°C
mbar
Maximum static head
m
Minimum circulating head
m
Boiler thermostat range
°C
Limit (safety) thermostat shut off temperature
°C
Maximum casing temperature
°C
Electricity supply
Burner motor power
Watts
Absorbed motor power
kW
Starting current
Amps
Running current
Amps
Oil connection
Conventional flue draught
mbar in wg
Maximum operating pressure sealed/open system
bar
Maximum operating pressure pressure relief valve
bar
Boiler type
- Weight of shell – without baffles and clean out door: 45.5kg
Wall Hung External
Wall Hung External System
16-21
16-21
11
11
2.4
2.4
92.1
96.1
203
211.9
56.5
56.5
124.6
124.6
21.0
21.0
71,700
71,700
1,800
1,800
900
900
Accepts 21.5 mm Ø polypropylene overflow pipe
100
28.5
10.0
28
1
50 to 75
110 ± 3
Less than 50
~230 1ph 50Hz 5A fused
75
0.155
0.143
2.7
0.67
¼ BSP male (on end of flexible fuel hose)
Minimum: 0.087 – Maximum: 0.37
Minimum: 0.035 – Maximum: 0.15
2.5
3.0 ON/OFF
2.2 SEALED SYSTEM DATA
Table 2-2: Sealed System Data
External System 16-21
Heating system pressure (cold)
Minimum 0.5 bar | Maximum 1.0 bar
Operating pressure of pressure relief valve
3.0 bar
Expansion vessel size (pre-charged at 1 bar)
8 litres
Maximum heating system volume (including boiler)*
85 litres**
Cold water mains connection
15 mm compression (supplied)
Pressure relief valve discharge connection
15 mm compression (supplied)
- Based on vessel charge of 0.3 bar and system cold fill pressure of 0.5 bar. These values are the remaining system volume available after deducting the boiler water content.
** Approximately
Page 6
Section 2: Technical Data
2.3 BURNER SETTINGS
Table 2-3: Burner settings
Boiler models (burner
type)
Heat output (kW) (Btu/h)
Nozzle
Oil pressure
(bar)
Smoke No.
Burner head type
Distance between nozzle and burner head
Fuel
flow rate (kg/h)
Flue gas temp. (°C)
CO2 (%)
External and 16.5 56,300 0.50/80°EH
7
0 – 1 EK 16-21
29.5
External
System 16-21
18.7 * 63,800 0.50/80°EH
10
0 – 1 EK 16-21
31.0
(Ecoflam
Max 1 LN
Vortex WM 21.0 71,700 0.60/80°EH
8
0 – 1 EK 16 – 21
31.0
16-21 ERP)
1.38
65 – 69
12.5
1.56
70 – 75
12.5
1.76
75 – 79
12.5
Notes:
Flue gas VFR: Flue gas volumetric flow rate 1. The data given above is
approximate only and is based on the boiler being used with a low level
balanced flue. 2. The above settings may have to be adjusted on site for the
correct operation of the burner.
3. Gas Oil is NOT suitable for use with Grant Vortex boiler range 4. The flue
gas temperatures given above are ± 10%. 5. When commissioning, the air damper
must be adjusted to obtain the correct CO2 level. 6. * Factory settings: 16-21
– 18.7kW.
7. The combustion door test point may be used for CO2 and smoke readings
only. Do not use this test point for temperature or efficiency readings. 8.
The installer must amend the boiler data label if the output is changed.
Flue gas VFR (m³/hr)
17.0
20.0
23.0
2.4 FLUE GAS ANALYSIS
To allow the boiler to be commissioned and serviced, the boiler is supplied
with a combustion test point on the front cleaning door. When this test point
is used please note the following: · The test point is for CO2 and smoke
readings only. · The boiler efficiency and temperature must be taken from the
flue test point on high level, vertical and conventional flue adaptors. ·
Concentric low level flues do not contain a test point. The temperature and
efficiency readings must be taken from the flue terminal.
2.5 WATER CONNECTIONS
Table 2-4: Water connections
Boiler model All models
Size 22 mm
Flow connection Fitting
Push-fit Tectite
Supplied Fitted
Size 22 mm
Return connection Fitting
Push-fit Tectite
Supplied Fitted
Section 2: Technical Data
Page 7
89
Flow Return Cold Mains Electricity
2.6 BOILER DIMENSIONS
684
FRONT VIEW
351
351
122 394 832
832
684
123
425
73 120 120
270
133 168 202 237 272 308
670
BACK PANEL*
102
Flow Return Cold Mains Condensate Electricity
23 214
LEFT SIDE VIEW
RIGHT SIDE VIEW
246
TOP VIEW
*Back panel viewed from front. Figure 2-1: Vortex Eco Wall Hung External and External System 16-21
Page 8
674
BOTTOM VIEW
98 185 245
Section 2: Technical Data
3 OIL STORAGE AND SUPPLY SYSTEM
3.1 FUEL SUPPLY
3.1.1 FUEL STORAGE
The tank should be positioned in accordance with the recommendations given in
BS 5410-1 (Code of practice for liquid fuel firing. Installations for space
heating and hot water supply purposes for domestic buildings). This gives
details of the requirements for suitable oil tank construction, tank
installation, tank bases, fire protection and secondary containment. For
installations of greater than 70kW output capacity, the tank should be
installed accordance with BS 5410-2. Oil storage tanks should comply with the
following standards: · Plastic tanks OFT T100 · Steel tanks OFT T200
! CAUTION !
A galvanised tank must not be used.
! NOTE !
Plastic tanks should be stood on a firm non-combustible base that adequately
and uniformly supports the weight of the tank over its entire base area.
The tank capacity should be selected to suit the appliance rated output. Refer
to BS5410-1 for guidance.
3.1.2 FUEL PIPES
Fuel supply pipes should be either copper or steel. Galvanised pipes or
fittings should not be used. Plastic oil supply pipe conforming to BS EN 14125
can be used for underground pipe runs, but must not be used above ground.
All soft copper pipe connections should preferably be made using flared
fittings. If compression fittings are to be used, a suitable pipe insert must
be fitted into the pipe end. Soft soldered connections must NOT be used on oil
supply pipework.
Fuel supply pipework should be of a suitable diameter, depending on the type
of oil supply system being used. Refer to information given in sections 3.1.3,
3.1.4 or 3.1.5. Run pipes as level as possible to prevent air being trapped.
Take the most direct route possible from tank to burner whilst locating the
pipe where it will be protected from damage. Pipes should be supported to
prevent sagging and sleeved where they pass through a wall. A metal body fuel
filter with a filtration size of no more than 50 m (micron) must be fitted in
the oil supply pipe close to the tank. This should be fitted with sufficient
clearance around and below it to allow easy access for maintenance. An
isolating valve should also be fitted at the tank, before the filter, to allow
the oil supply to be shut off for the filter to be serviced. A second filter
(15 m for Kerosene) must be located closer to the burner to protect the burner
pump and nozzle from contamination. Refer to Figures 3-1 to 3-3. A remote
sensing fire valve must be installed in the fuel supply line in accordance
with BS5410-1. A fusible wheelhead type combined isolating/fire valve MUST NOT
be used in place of a remote sensing fire valve. The fire valve must be
located externally to the appliance casing, with the fire valve sensor located
above the burner. A spring clip for mounting the sensor is supplied fitted to
the boiler, on the rear of the control panel. The fire valve should be located
after the second (15 micron) filter, i.e. between the filter and the point at
which the oil line enters the appliance casing. Refer to Figures 3-1 to 3-3.
Section 3: Oil Storage and Supply System
The fire valve must have an operating temperature of between 90 and 95°C to
avoid unnecessary nuisance shut-offs to the oil supply.
Two flexible fuel hoses, adaptors and ¼ isolating valves are supplied loose
with the boiler, to make the final connection to the burner with a two pipe or
`Tiger Loop’ type de-aerator.
Metal braided flexible fuel hoses should be replaced ANNUALLY when the boiler
is serviced.
Long life flexible fuel hoses should be inspected annually and replaced, if
necessary, or after a maximum five years service life.
Flexible fuel hoses MUST NOT be used outside of the appliance casing.
3.1.3 SINGLE PIPE (GRAVITY) SYSTEM (REFER TO FIGURE 3-1)
Head (metres)
0.5 1 1.5 2 2.5 3 3.5
Maximum pipe run (m)
Ø 6 mm
Ø 8 mm
Ø 10 mm
19
60
100
21
66
100
23
72
100
25
79
100
27
85
100
29
91
100
31
98
100
If the storage tank outlet is at least 300 mm above the level of the burner
oil pump, a single pipe (gravity) system should be used.
The maximum height of the oil level above the burner oil pump when the tank is
full, must not exceed four metres. If this height is exceeded, a pressure
reducing valve must be fitted in the oil supply pipe between the tank and the
burner oil pump.
The maximum length of pipe run from the tank to the burner is limited by the
minimum head of oil (the height of the tank outlet above the burner oil pump).
3.1.4 TWO PIPE SYSTEM (REFER TO FIGURE 3-2)
Head (metres)
0.5 1 1.5 2 2.5 3 3.5
Maximum pipe run (m)
Ø 6 mm
Ø 8 mm
Ø 10 mm
15
47
100
13
41
99
11
34
84
9
28
68
7
22
53
5
15
37
–
9
22
If the storage tank outlet is below the level of the burner oil pump, a two
pipe (sub gravity) system can be used.
The return pipe should be at the same level as the tank outlet, between 75 to
100 mm above the base of the tank. The return pipe should be a sufficient
distance from the tank outlet so as to prevent any sediment disturbed by the
return entering the supply pipe from the tank.
A non-return valve should be fitted in the supply pipe, along with a fire
valve and filters (refer to section 3.1.2 – fuel pipes). A nonreturn valve
should also be fitted in the return pipe if the top of the tank is above the
burner oil pump.
The maximum suction height (from the tank outlet to the level of the burner
oil pump), must not exceed 3.5 metres.
The pump vacuum should not exceed 0.4 bar. Beyond this limit, gas is released
from the oil.
For guidance on the installation of top outlet fuel tanks and suction oil
supply pipe sizing, refer to OFTEC Technical Book 3: Storage and Supply,
available for purchase from OFTEC.
Page 9
300mm
Mi3.n5m Max 4m Max
300mm
5
7
99
32
1
12 4
2
6
85
3
5 Figure 3-1: Single pipe (gravity) system
5
7
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10
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6
3
8 55
9
3
Figure 3-2: Two pipe system
5
10 3 2
1
95
150mm 300mm
3.5m Max 3.5m Max
150mm 3.5m Ma3.x5m Max
GRANT ENGINEERING UK LTD
7 5 11 Hopton Industrial Estate Devizes SN10 2EU 9 DRAWING NAME:
Oil Tank Installation for Oil Boiler Manuals – External Wall
12 4
2
6
85
SCALE: A4: 1:40 DATE: 23rd November 2017
3 10 3 2
DRAWING NUMBER: 00 DRAWN BY: T. K. Lavery
CHECKED BY: P. Stanley
1
Figure 3-3: De-aeration device system
5 KeGyRtoANoTil sEuNpGpIlNyEdEiaRgINraGmUsK LTD H1opton Industrial EstaOteilDtaenvkizes SN10 2EU
5
SCALE: A4: 1:40 Heating flow and return
DRAWING NUMBER: 00
9
Burner
9 D2RAWING NAME:Isolating valve
6
Oil filter (D15ATmE:m2a3xrd. fiNltroavteiomnbseizre2)017
O3 il Tank Installation Ofoirl OstrilaBinoeirler Manuals – Extern7al Wall
Fire valve sensor
10 11
DRAWN BY:NTo.nK-r.eLtuarvnevryalve
CHECKED BY:DPe.-aSetraantolery*
4
Fire valve to BS 5410-1
8
Oil pump
12
Appliance isolation valves
- Position of de-aeration device must be level with or above the oil pump
5
Page 10
Section 3: Oil Storage and Supply System
m m Max
3.1.5 SINGLE PIPE (SUCTION) SYSTEM WITH DEAERATOR – (REFER TO FIGURE 3-3)
If the storage tank outlet is below the level of the burner oil pump, an
alternative to the two pipe (sub gravity) system is the single pipe (suction)
system using a deaerator, e.g. a `Tiger Loop’ device.
The deaerator creates a loop with the burner oil pump, with the oil being
circulated through the pump out to the deaerator and back to the pump. Any air
in the single pipe lift from the tank is removed from the oil, collected in
the deaerator and then discharged to outside.
3.2 BURNER OIL CONNECTION
The burner fuel pump is supplied factory set for use with a two pipe oil
supply system.
For ease of access to the burner oil pump connections, the burner should be
removed from the boiler as follows:
1. Unscrew and remove the single burner fixing nut from the stud on the
burner flange (at the top of the burner) using a 13 mm spanner. Retain the
fixing nut for re-fitting the burner.
2. Rotate the burner clockwise and carefully withdraw the burner from the
boiler. Refer to Figure 3-5.
! WARNING !
To prevent any fuel vapour being discharged within the building, the deaerator
must be fitted outside, in accordance with BS 5410-1, unless it is
specifically designed to be installed inside.
The de-aerator must be mounted vertically at the same level as (or above) the
burner oil pump. Refer to Figure 3-3.
RETURN FROM PUMP
Tiger Loop
SUPPLY TO PUMP
1/4″ BSP female connections
SUPPLY FROM TANK
Figure 3-4: Tiger loop de-aeration device
An external deaerator must not be fitted within 500 mm of a flue terminal.
Always follow the manufacturers installation instructions supplied with the
deaerator.
Figure 3-5: Burner removal
SINGLE PIPE (GRAVITY) SYSTEM
For use on a single pipe system, it is necessary to fit the `horseshoe’ washer
into the tapping in the pump. Refer to Figure 3-6.
Section 3: Oil Storage and Supply System
Figure 3-6: Fitting/location of `hoseshoe’ washer
Page 11
4 INSTALLATION
4.1 INTRODUCTION
The boiler is supplied already fully assembled in a carton which is carefully
packed with packing materials. As the boiler is wall mounted all of the
content of the boiler casing must be removed with the packaging before
installation can begin, to give access to the rear fixing panel.
The installation procedure therefore begins with unpacking and dismantling of
the packed boiler.
4.2 BOILER LOCATION
The module should installed externally, fixed to a wall that is firm, flat,
vertical and capable of supporting the boiler when full of water. Refer to
Section 2.1 for weights. It does not require any special mounting provisions
as the temperature of the boiler casing is less than 50°C.
The module must be positioned such that the required clearances from the low
level flue outlet as shown in Figure 9-2 are achieved.
The module must be installed with the flue terminal terminating at least two
metres above ground level (refer to BS 5410-1). No terminal guard can be
fitted if termination is less than two metres above ground level. In this
situation, use the Green flue system to achieve the minimum height. Refer to
Section 9.
The flue terminal must be a minimum distance of 1.8 metres from an oil storage
tank.
The flue terminal should be positioned so as to avoid products of combustion
accumulating in stagnant pockets around the building or entering into
buildings.
Sufficient clearance must be allowed at the front of and below the boiler to
remove the burner and baffles for servicing.
4.3 REGULATIONS COMPLIANCE
! NOTE !
Failure to install and commission appliances correctly may invalidate the
boiler guarantee.
Installation of a Grant Vortex boiler must be in accordance with the following
recommendations:
· Building Regulations for England and Wales, or the Building Standards for
Scotland, as appropriate.
· Any relevant local Byelaws which you must check with the local authority for
the area concerned.
· The Water Supply (Water Fittings) Regulations 1999 or the Water Supply
(Fittings) (Scotland) Byelaws 2014, as appropriate.
· Applicable Control of Pollution Regulations. · The following OFTEC
requirements:
· OFS T100 Polythene oil storage tanks for distillate fuels. · OFS T200 Fuel
oil storage tanks and tank bunds for use
with distillate fuels, lubrication oils and waste oils.
Further information may be obtained from the OFTEC Technical Book 3
(Installation requirements for oil storage tanks) and OFTEC Technical Book 4
(Installation requirements for oil fired boilers).
The installation should also be in accordance with the latest edition of the
following British Standard Codes of Practice (and any relevant amendments):
· BS 5410-1: 2019 (Code of practice for liquid fuel firing. Installations for
space heating and hot water supply purposes for domestic buildings)
· This standard covers domestic installations up to 70kW. · BS 5410-2: 2018
(Code of practice for liquid fuel firing. Non-
domestic installations)
· This standard should be followed with regard to installations with an output
capacity in excess of 70kW.
· Where the combined outputs of multiple appliances located together at a
domestic dwelling exceed 70kW then then a dedicated plant room as specified in
BS 5410-2 is recommended.
· BS EN 12828 (Heating systems in buildings. Design for water-based heating
systems)
· BS EN 12831-1 (Energy performance of buildings. Method for calculation of
the design heat load)
· BS EN 14336 (Heating systems in buildings. Installation and commissioning of
water-based heating systems)
· BS 7593 (Code of Practice for treatment of water in domestic hot water
central heating systems)
· BS 7671 (Requirements for Electrical installations, IET Wiring Regulations)
· BS 7291 (Thermoplastics pipe and fitting systems for hot and cold water for
domestic purposes and heating installations in buildings. General
requirements)
· BS 7074-1 (Application, selection and installation of expansion vessels and
ancillary equipment for sealed water systems. Code of practice for domestic
heating and hot water supply)
· BS 2869 (Fuel oils for agricultural, domestic and industrial engines and
boilers. Specification)
! WARNING !
BS5410-1: 2019 requires that appliances located in a building or structure or
within a restricted area externally should have a CO detector conforming to BS
EN 50291-1 installed in the same room/space.
4.4 HEATING SYSTEM DESIGN CONSIDERATIONS
! WARNING !
Before starting any work on the boiler or fuel supply, please read the Health
and Safety information given in Section 15.
To achieve the maximum efficiency possible from the Grant Vortex boiler, the
heating system should be designed to the following parameters:
RADIATORS:
· Flow temperature 70°C · Return temperature 50°C · Differential 20°C Size
radiators with a mean water temperature of 60°C. Design system controls with
programmable room thermostats or use weather compensating controls to maintain
return temperatures below 55°C.
! NOTE !
The boiler should not be allowed to operate with return temperatures of less
than 40°C when the system is up to temperature.
The use of a pipe thermostat is recommended to control the return temperature
when using weather compensating controls.
UNDERFLOOR:
· Flow temperature 50°C · Return temperature 40°C · Differential 10°C In
underfloor systems, it is essential that the return temperature must be
maintained at or above 40°C to prevent internal corrosion of the boiler water
jacket.
Refer to Section 2.5 for the size and type of the connections and Section 5
for the position of the connections.
Page 12
Section 4: Installation
OPEN VENTED SYSTEMS:
! NOTE !
The presence of pumping over’ in an open vented heating system connected to the Grant Vortex boiler will invalidate the product guarantee. Open vented systems must be correctly designed and installed. The open safety vent pipe must be positioned to prevent
pumping over’ (i.e. the discharge of
water from the open safety vent pipe into the feed and expansion cistern under
the pressure created by the circulator). For detailed information on the
correct design of open vented heating systems, and the correct location of the
open safety vent pipe, refer to the CIBSE Domestic Heating Design Guide and
OFTEC Technical Book 4 (Installation).
4.5 PIPEWORK MATERIALS
Grant Vortex boilers are compatible with both copper and plastic pipe. Where
plastic pipe is used it must be of the oxygen barrier type and be the correct
class (to BS 7291-1) for the application concerned. On either sealed or open-
vented systems; where plastic pipe is used a minimum of ONE metre of copper
pipe (or as per pipe manufacturers instructions) MUST be connected between
both the boiler flow and return connections and the plastic pipe.
! NOTE !
Do not connect plastic pipe directly to the boiler.
Grant UK does not accept any responsibility for any damage, however caused, to
plastic piping or fittings.
SEALED SYSTEMS
If plastic pipe is to be used, the installer must check with the plastic pipe
manufacturer that the pipe to be used is suitable for the temperature and
pressures concerned. Plastic pipe must be Class S to BS 7291-1.
4.7 PREPARATION FOR INSTALLATION
The following procedure must be performed before you can begin dismantling the
boiler for installation:
1. With the boiler on the pallet, open the carton and remove all packing
materials and the carton from the boiler.
2. To access the controls, remove the front door from the boiler.
Turn the knob at the bottom of the front door anticlockwise and pull the door
outwards at the bottom. Carefully release the top of the front door panel from
under the top casing panel flange and remove it from the boiler to reveal the
boiler as shown in Figure 1-1.
3. Remove internal packaging from within boiler casing. 4. Remove flue
terminal, filling loop and flexible oil hose packs
from within boiler.
4.8 DISMANTLING THE BOILER
Dismantle the boiler as follows, keeping all components, screws and washers
for re-assembly:
1. Slacken off hose clip on burner air inlet and remove snorkel tube from
boiler.
2. Unscrew earth wire from underside of top casing panel.
3. Remove screws securing top casing panel and remove casing panel from
boiler.
4. Remove silver cover from burner control box and disconnect plug from
burner control box.
5. System model only Disconnect plug from pump. 6. Unscrew inlet connection
to condensate trap and remove
trap from boiler.
7. Remove retaining clip and thermostat phials from their pocket in the right
side of heat exchanger below the return connection. (See Figure 4-1)
Pocket for Thermostat Phials
! WARNING !
When plastic pipe is used, the system MUST incorporate a low pressure switch to shut off power to the boiler if the system pressure drops below 0.2 bar. A suitable low pressure switch kit is available to purchase from Grant UK (product code: MPCBS62).
UNDERFLOOR PIPEWORK
Plastic pipe may be used on underfloor floor systems where the plastic pipe is
fitted after the thermostatic mixing valve. Copper tube must be used for at
least the first metre of flow and return primary pipework between the boiler
and the underfloor mixing/ blending valves.
4.6 CONNECTIONS 4.6.1 FLOW AND RETURN CONNECTIONS
Refer to Sections 4.9 & 5.
4.6.2 CONDENSATE CONNECTION
Grant Vortex Eco boilers are supplied with a factory-fitted condensate trap to
provide the required 75 mm water seal in the condensate discharge pipe from
the boiler. Refer to Section 6 for details of the condensate disposal
pipework.
Figure 4-1: Removing thermostat phials
8. System model only – Unscrew and disconnect pressure gauge pipe from PRV
body.
9. System model only – unscrew expansion vessel hose from connection on
boiler shell and remove expansion vessel from boiler. (See Figure 4-2)
10. Remove screws securing right hand side panel and remove side panel,
complete with control panel, pulling it forward and away from boiler.
11. Repeat procedure to remove left hand side panel from boiler.
12. Remove screws securing bottom casing panel and remove bottom panel from
boiler.
13. System model only – Unscrew upper pump union and remove pump, complete
with flow pipe, from boiler. (See Figure 4-3)
4.6.3 DRAIN COCK
A drain cock is fitted at the bottom on the front of the boiler to allow the
heating system to be drained.
Section 4: Installation
Page 13
14. Non-system model Unscrew compression connection on boiler shell and
remove flow pipe from boiler.
15. Unscrew top right compression connection and remove return pipe from
boiler.
16. Using a 13mm socket, slacken burner retaining nut (on top of burner).
Rotate burner clockwise (towards rear of boiler), pull burner to the right
until burner head is clear of mounting flange and remove burner from boiler.
17. Using 13mm spanner, unscrew the two clean-out door retaining nuts and
remove door from front of boiler shell. (See Figure 4-4).
Figure 4-2: Expansion vessel, Expansion vessel bracket and hose connection – System model only
Figure 4-4: Removing clean-out door 18. Remove baffles from boiler shell. (See Figure 4-5).
Return Pipe
Upper pump union (slightly obscured by pump cover)
Flow Pipe
Figure 4-5: Removing baffles from boiler shell
19. Undo retaining screw and nut and remove transit bracket from top of
boiler shell.
20. Push boiler shell upwards to disengage it from mounting bracket on back
panel of boiler taking care not to damage the insulation on the side of shell.
21. Lift boiler shell away from back panel and stand it upright on the four
feet.
! WARNING !
The boiler shell is HEAVY and requires more than one person to lift. Refer to
Section 2.1 for boiler weights.
22. Carefully remove the foil-faced insulation from the back panel.
23. Unscrew and remove the two transit screws securing mounting bracket and
back panel to pallet.
Figure 4-3: Removing flow and return pipe – System model only
Page 14
Section 4: Installation
4.9 INSTALLING THE BOILER
You are now ready to install the boiler.
! NOTE !
The boiler must be mounted such that the boiler flue terminal (supplied with
the boiler) terminates at or above 2 metres above ground level. If the
distance is to be less than this, Grant UK suggest using the Green system to
achieve a termination point of at least 2 metres above ground level. The
procedure is as follows: Figure 4-6 shows the mounting bracket in position on
the back casing panel, with the holes in the bracket in-line with the
corresponding holes in the back casing panel.
Keyhole slots
Mounting bracket fixing holes
6. Locate the mounting bracket on to the back panel, aligning the four holes
in the bracket with those in the back panel. Ensure that the mounting `hooks’
are pointing upwards and secure using the fixings supplied with the boiler.
7. Check the mounting bracket is level. 8. Carefully refit insulation into
back panel, passing mounting
‘hooks’ through the two slits in the insulation.
9. Lift the boiler shell and hang it on the mounting bracket ensuring that
the mounting plates on either side of the shell are fully located in the
vertical slot of both mounting hooks.
! WARNING !
The boiler shell is HEAVY and requires more than one person to lift. Refer to
Section 2.1 for boiler weights.
10. Re-fit the return pipe to top right hand connection on boiler shell. Pass
return pipe from system through hole in wall and connect to boiler return
pipe.
11. System model only – Re-fit pump complete with flow pipe to upper pump
union on boiler shell. Ensure that rubber pump union washer is fitted. Pass
flow pipe from system through hole in wall and connect to boiler flow pipe.
12. Non-system model Re-fit flow pipe to compression connection on boiler
shell. Pass flow pipe from system through hole in wall and connect to boiler
flow pipe.
! NOTE !
It is recommended that the system flow and return pipes are connected to the boiler at this point in the installation. Two 22mm isolating valves are supplied for use with sealed system models only. These must not be used on an open vented system. These boiler isolating valves should be located adjacent to the boiler in a convenient position.
Figure 4-6: Mounting bracket and fixing holes in position on back panel
1. Remove any required knockouts from the back and bottom panels of the
boiler casing for the heating system pipework, cold mains supply, oil supply,
condensate discharge, electricity supply and PRV discharge (it is recommended
that one of the knockouts in the bottom panel is used for the PRV discharge).
2. Locate and hold the back panel in the required position on the wall. Check
it is level using a spirit level on the top flange.
Mark position of the holes for the two keyhole slots (See Figure 4-6). Remove
the back panel from the wall.
3. Drill and fit wall fixing plugs (not supplied) in the two holes.
Fit the two screws (supplied) and mount the back panel on the wall using the
two keyhole slots.
Check again that the back panel is level before proceeding.
4. Mark the position of the four mounting bracket fixings on to the wall from
the back panel. Also mark the positions of the flow and return pipes, the cold
mains (for filling loop), the electrical power supply, and the condensate
discharge pipe.
5. Remove the back panel from the wall. Drill the holes for the mounting
bracket fixing holes. Drill all other necessary holes.
Re-mount the back panel on the two keyholes slots.
13. System model only – connect a 15 mm discharge pipe, of metal
construction, to the outlet of the PRV and run vertically down through the
relevant knockout in the bottom panel of the boiler casing. Refer to Sections
5.2 and 7 for further guidance
14. Re-fit burner. First remove burner securing nut, locate burner head into
hole in burner flange/boiler shell and locate mounting screw through hole on
top of burner. Re-fit nut and tighten to secure burner in place. Connect
flexible oil lines from oil supply pipework to burner. It is recommended that
the copper oil lines are installed at this stage while the side panels are not
in place.
15. Refit baffles into boiler shell ensuring they are in the correct order
(check marking on each baffle) as shown in Figure 4-7.
Section 4: Installation
Page 15
4.10 FILLING THE HEATING SYSTEM
Refer to Section 7.2 (Filling the Sealed System)
Figure 4-7: Re-fitting baffles into boiler shell
16. Locate clean-out door onto the two studs, re-fit nuts and tighten to
secure door in place.
17. Refit left hand casing panel and secure in place with screws (with
washers).
18. Refit bottom casing panel and secure in place with screws (with washers).
19. Refit right hand casing panel complete with control panel fitted.
20. Relocate thermostat bulbs in pocket at rear right hand side of boiler
shell.
21. System model only – Reconnect pressure gauge to PRV and tighten.
22. Re-connect burner plug to burner control box and refit the silver cover
onto the control box.
23. System model only – Reconnect pump plug.
24. Refit condensate trap. Connect condensate discharge pipe to outlet of
trap. Refer to Section 6 for further details.
25. System model only – Refit expansion vessel onto bracket inside right hand
side panel and reconnect expansion vessel hose to connection on front right
hand side of boiler shell. Ensure rubber sealing washer is fitted.
26. Refit top casing panel and secure in place with screws (with washers).
27. If the flue terminal supplied is to be fitted, carefully push it through
the seal in the hole in top casing panel.
Ensure that the seal is fitted to the terminal and that it is pushed fully
home into the flue connector on the boiler shell. Position the outlet to point
to the left and at an angle of 45° away from the wall.
28. Re-fit casing front door – locate top edge up under front flange of top
panel. Push bottom of front panel into opening until flush with edge of side
panels before rotating handle clockwise to secure.
29. Fit the wall flashing strip. Position the strip with the bottom edge of
the wider flange 20 mm above the enclosure top panel, with the narrow flange
(with the three fixing holes) flat against the wall. The strip should overhang
the top panel by an equal amount at each end.
4.11 BEFORE YOU COMMISSION
To avoid the danger of dirt and foreign matter entering the boiler the
complete heating system should be thoroughly flushed out both before the
boiler is connected and then again after the system has been heated and is
still hot. This is especially important where the boiler is to be installed on
an older system.
For optimum performance after installation, the boiler and the associated
heating system must be flushed in accordance with the guidelines given in BS
7593 (Treatment of water in domestic hot water central heating systems). This
must involve the use of a proprietary cleaner, such as Sentinel X300 (new
systems), Sentinel X400 (existing systems), or Fernox Restorer.
After cleaning, it is vitally important that all traces of the cleaner are
thoroughly flushed from the system.
For long term protection against corrosion and scale, after cleaning/flushing
a suitable inhibitor should be added to the system water, such as Sentinel
X100 or Fernox MB-1, in accordance with the manufacturers’ instructions.
Failure to follow the above will invalidate the guarantee.
If the boiler is installed in a garage, out house or outside, in order to
provide further protection should there be a power failure in cold weather, a
combined anti-freeze and corrosion inhibitor can be used such as Sentinel X500
or Fernox Alphi-11. Follow the manufacturers’ instructions supplied to achieve
the level of antifreeze protection required.
For details of the Sentinel Products visit www.sentinel-solutions. net and for
Fernox products visit www.fernox.com.
Grant UK strongly recommends that a Grant Mag One in-line magnetic filter/s
(or equivalent*) is fitted in the heating system pipework. This should be
installed and regularly serviced in accordance with the filter manufacturer’s
instructions.
- As measured by gauss. The MagOne magnetic filter has a gauss value of 12000.
4.12 COMPLETION
Following installation of the boiler, instruct the user in the operation of the boiler, the boiler controls, the heating controls and the safety devices.
Please ensure that the OFTEC CD/10 installation completion report (provided with the boiler) is completed in full, leaving the top copy with the user and retain the carbon copy for your own records.
Ensure that the User Handbook (supplied with the boiler) is handed over to the user.
Page 16
Section 4: Installation
5 PIPE CONNECTIONS
5.1 WATER CONNECTIONS FLOW AND RETURN CONNECTIONS ALL MODELS
On all models a 22mm push-fit connection is provided for both the heating flow
and return connections. Holes are provided in the back plate at high and low
levels to route the pipework back into the property as required. See Section
2.6.
! CAUTION !
All pipes to be fitted into the push-fit connectors provided should be cut
using a pipe slicer or pipe cutter – to leave the pipe ends with a slight
radius and free from any burrs or sharp edges. Pipes to be used with these
fittings should not be cut square using a hacksaw.
PIPE ENTRY/EXIT HOLES IN CASE
All models have holes to enable the pipework to exit the boiler casing.
On all models these holes are pre-cut knock-outs located in both the back and
bottom panels.
Push out the `knock-out’ from the required holes, taking care not to distort
the panel.
5.2 WATER CONNECTIONS SYSTEM MODELS
A 15 mm discharge pipe must be connected to the safety valve outlet
connection. The pipework between the safety valve and the boiler must be
unrestricted, that is, no valves. The discharge pipe should be run to the
outside of the building and terminate so that it cannot cause injury to
persons or property.
A 15 mm double check valve ballofix type valve is provided on the flexible
filling loop hose for connection of the cold mains supply to the heating
system.
The cold mains supply should terminate inside the boiler casing.
A drain cock is fitted at the bottom on the front of the boiler to allow the
heating system to be drained.
The expansion vessel is connected via a flexible hose to allow it to be moved
to gain access to the burner and condensate trap for servicing.
When replacing the vessel, care should be taken to ensure that the flexible
connecting hose is not twisted.
Figure 5-1: Non system boiler flow and return connections Return
Flow
! NOTE !
For guidance on the connection of the heating system pipework, please refer to
Section 4.9.
Section 5: Pipe Connections
Figure 5-2: System boiler flow and return connections
Page 17
6 CONDENSATE DISPOSAL
6.1 GENERAL REQUIREMENTS
When in condensing mode the Grant Vortex boilers produce condensate from the
water vapour in the flue gases. This condensate is moderately acidic with a pH
value of around 3.27 (similar to orange juice). Provision must be made for the
safe and effective disposal of this condensate. Condensate can be disposed of
using one of the following methods of connection: Internal connection
(preferred option) · into an internal domestic waste system (from kitchen
sink,
washing machine, etc.)
· directly into the soil stack External connection · into an external soil
stack
· into an external drain or gulley
· into a rainwater hopper (that is part of a combined system where sewer
carries both rainwater and foul water)
· purpose made soakaway All condensate disposal pipes must be fitted with a
trap – whether they are connected internally or externally to a domestic waste
system/soil stack or run externally to a gully, hopper or soakaway.
6.2 CONNECTIONS
Connections into a rainwater hopper, external drain or gulley should be
terminated inside the hopper/drain/gulley below the grid level but above the
water level.
! CAUTION !
Condensate disposal pipes must not be connected directly into rainwater
downpipes or to waste/soil systems connected to septic tanks.
Condensate should not be discharged into `grey water’ systems that re-use
water used in the home (not including water from toilets).
It should be noted that connection of a condensate pipe to the drain may be
subject to local Building Control requirements.
6.3 PIPEWORK
Condensate disposal pipework must be plastic (plastic waste or overflow pipe
is suitable).
! NOTE !
Copper or steel pipe is NOT suitable and MUST NOT be used.
Condensate disposal pipes should have a minimum nominal’ diameter of 22 mm (¾) – e.g. use 21.5 mm OD polypropylene overflow pipe. Condensate disposal pipes must be fitted with a fall (away from the boiler) of at least 2.5° (~45 mm fall per metre run). ! NOTE ! Where it is not possible for the pipe to fall towards the point of discharge – either internally into a waste system or externally to a gulley (e.g. for boilers installed in a basement), it will be necessary to use a condensate pump. Condensate disposal pipes should be kept as short as possible and the number of bends kept to a minimum. Pipes should be adequately fixed to prevent sagging, i.e. at no more than 0.5 metre intervals. 6.4 EXTERNAL PIPEWORK Ideally, external pipework, or pipework in unheated areas, should be avoided. If unavoidable, external pipework should be kept as short as possible (less than 3 metres) and 32 mm waste pipe used to minimise the risk of ice blocking the pipe in freezing conditions. The number of bends, fittings and joints on external pipes should be kept to a minimum to reduce the risk of trapping condensate. ! NOTE ! For boilers installed in an unheated area such as a loft, basement, outhouse or garage, all condensate pipework should be as
external’. The pipework
should be insulated using suitable waterproof and weather resistant
insulation.
32 mm waste pipe external to the building Cement seal
Minimum 2.5O fall Ground level
25 mm
300 mm
400 mm min.
100 mm plastic tube Sealed end Figure 6-1: Purpose made condensate soakaway
Two rows of 3 x 12 mm
holes at 25 mm centres Backfill with 10 mm and 50 mm from the bottom limestone
chippings of the tube. Holes facing
away from the property.
Page 18
Section 6: Condensate Disposal
6.5 CONDENSATE SOAKAWAY
To keep external pipework to a minimum, locate the soakaway as close as
possible to the boiler but ensure it is at least 500 mm from building
foundations and away from other services, e.g. gas, electricity, etc.
The condensate pipe may be run above or below ground level and can enter
either the top or side of the soakaway tube. Refer to Figure 6-1.
Ensure that the drainage holes in the soakaway tube face away from the
building. Backfill both the soakaway tube, and the hole around it, with 10 mm
limestone chippings.
Only use a soakaway where the soil is porous and drains easily. Do not use in
clay soils or where the soil is poorly drained.
! CAUTION !
Any damage due to condensate backing up into the boiler due to a high water
table, in the case of a soakaway, or flooded drains when the condensate
disposal is via a gulley or soil stack, is not covered by the Grant product
guarantee.
6.6 CONDENSATE TRAP
Grant Vortex boilers are supplied with a condensate trap to provide the
required 75 mm water seal in the condensate discharge pipe from the boiler.
The condensate trap is factory fitted inside the boiler casing mounted on the
outlet of the condensing heat exchanger – in an accessible position to allow
for routine maintenance.
A push-fit’ elbow connects the outlet of the condensing heat exchanger to the trap inlet. Ensure the elbow connector is fully pushed onto the
top hat’
inlet connector of the trap.
With the trap fitted inside the boiler casing, the sealing cap must be fitted.
If the trap is re-located outside the boiler then the following applies:
· If connecting the condensate discharge – either internally or externally –
into a waste system or soil stack – the sealing cap must be fitted in the trap
outlet.
· On external discharge systems to a hopper, gully or soakaway, the sealing
cap should be removed from the trap outlet.
· If there is any discharge of condensate from the overflow outlet, this could
indicate a blockage (possibly due to freezing). Turn off the boiler and
investigate the cause. If necessary, contact your service engineer for
assistance.
! WARNING !
Care should be taken when siting the trap such that the overflow outlet is
readily visible and that any condensate overflowing from the outlet cannot
cause either a hazard to persons or damage to surrounding property or
equipment.
This trap incorporates a float (which will create a seal when the trap is empty) and an overflow warning outlet (fitted with a plastic sealing cap), see Figures 6-2 and 6-3.
Overflow warning outlet (with cap)
Condensate outlet to drain
Condensate inlet from boiler
Unscrew this cap for maintenance access
Condensate trap
End cap
Figure 6-3: Condensate trap
Figure 6-2: Condensate trap
Section 6: Condensate Disposal
Page 19
6.7 CONDENSATE DISPOSAL PIPEWORK
The condense trap outlet is at an angle of 48° below the horizontal. This is
to automatically gives a 3° fall on any horizontal’ runs of condense disposal pipe. Refer to Figure 6-3 and see trap outlet/pipe. The outlet of the trap will accept 21.5 mm to 23 mm OD Polypropylene overflow pipe for the condensate discharge pipe. This discharge pipe can exit through the rear or bottom of the boiler through one of two pre-cut
knock-outs’ in either the back or bottom casing panels.
Push out the `knock-out’ from the required hole taking care not to distort the
side panel.
! NOTE !
When connecting plastic discharge pipe, ensure that the pipe is fully pushed
into the outlet end on the flexible hose to prevent the possibility of
leakage.
6.8 INSPECTION AND CLEANING OF TRAP
The trap must be checked at regular intervals (e.g. on every annual service)
and cleaned as necessary to ensure that it is clear and able to operate.
The bottom bowl can be unscrewed from the trap body for inspection and
cleaning.
To inspect and clean the trap:
1. Disconnect elbow from inlet connector. 2. Unscrew the inlet connection
nut.
3. Remove the inlet connector and nut from trap. 4. Disconnect the condensate
disposal pipe from the trap outlet. 5. Remove trap from bracket. 6. Remove
float from trap clean if necessary. 7. Inspect inside of trap and clean as
necessary.
8. Re-assemble trap, re-fit to boiler and re-connect elbow. Ensure that elbow
is fully pushed onto the trap inlet connector.
! CAUTION !
Failure to regularly check and clean the condensate trap may result in damage to the boiler and will not be covered by the product guarantee.
Page 20
Section 6: Condensate Disposal
7 SEALED SYSTEMS
7.1 SEALED SYSTEM REQUIREMENTS
All Grant Vortex Eco Wall Hung models are suitable for use with sealed systems
complying with the requirements of BS EN 12828, BS EN 12831 and BS EN 14336.
The system must be provided with the following items: · Diaphragm expansion
vessel complying with BS EN 13831 · Pressure gauge · Pressure relief (safety)
valve · Approved method for filling the system
7.1.1 EXPANSION VESSEL
The expansion vessel should be fitted in the return pipework as shown in
Figures 7-1 and 7-2. To reduce the operating temperature of the expansion
vessel, position it below the pipe to which it is connected.
The expansion vessel may be positioned away from the system, providing the
connecting pipe is not less than 13 mm in diameter. If the expansion vessel is
connected via a flexible hose, care must be taken to ensure that the hose is
not twisted or kinked.
! NOTE !
Ensure that the expansion vessel used is of sufficient size for the system
volume.
Refer to BS 7074-1 or The Domestic Heating Design Guide for sizing the
required vessel.
7.1.2 PRESSURE GAUGE
The pressure gauge must have an operating range of 0 to 4 bar. It must be
located in an accessible place next to the filling loop for the system.
7.1.3 PRESSURE RELIEF (SAFETY) VALVE
The pressure relief (safety) valve should be fitted in the flow pipework near
to the boiler. The pipework between the pressure relief (safety) valve and
boiler must be unrestricted, i.e. no valves. The pressure relief (safety)
valve should be connected to a discharge pipe which will allow the discharge
to be seen, but cannot cause injury to persons or damage to property.
Figure 7-1: Sealed system If thermostatic radiator valves are fitted, the
system must incorporate an adequate by-pass.
Figure 7-2: Sealed system boilers Section 7: Sealed Systems
Page 21
7.1.4 FILLING LOOP
Provision should be made to replace water lost from the system. This can be
done manually (where allowed by the local water undertaking) using an approved
filling loop arrangement incorporating a double check valve assembly. The
filling loop must be isolated and disconnected after filling the system.
7.1.5 HEATING SYSTEM
The maximum `setpoint’ temperature for the central heating water is 75°C.
Refer to Section 1.1. An air vent should be fitted in the flow and return
pipes of the highest point of the system. If thermostatic radiator valves are
fitted to all radiators, a system by-pass must be fitted. The by-pass must be
an automatic type. All fittings used in the system must be able to withstand
pressures up to 3 bar. Radiator valves must comply with the requirements of BS
2767. One or more drain taps (to BS 2879) must be used to allow the system to
be completely drained.
7.2 FILLING THE SEALED SYSTEM
Filling of the system must be carried out in a manner approved by the local
Water Undertaking.
! WARNING !
Only ever fill or add water to the system when it is cold and the boiler is
off. Do not overfill.
The procedure for filling the sealed system is as follows: 1. Check the air
charge pressure in the expansion vessel
BEFORE filling the system. The expansion vessel charge pressure should always
be slightly greater than the maximum static head of the system, in bar, at the
level of the vessel (1 bar = 10.2 metres of water). Refer to Figure 7-2. The
charge pressure must not be less than the actual static head at the point of
connection.
9. Repeat steps 5 to 7 as required until system is full of water at the
correct pressure and vented.
10. Water may be released from the system by manually operating the safety
valve until the system design pressure is obtained.
11. Close the fill point and double check valves either side of the filling
loop and disconnect the loop.
12. Check the system for water soundness, rectifying where necessary.
7.3 VENTING THE PUMP
For those heating circulating pumps fitted with a vent plug, it is important
that the pump is properly vented to avoid an air lock and also prevent it
running dry and damaging the bearings. Unscrew and remove the plug from the
centre of the pump motor. Using a suitable screwdriver, rotate the pump
spindle about one turn. Replace the plug in the motor. Do not over tighten.
! NOTE !
Some heating circulating pumps are not fitted with a vent plug so it is not
possible to vent these pumps in the manner described above. Refer to pump
manufacturers own instructions for further details.
If a Wilo Para pump is used, please refer to Appendix A1 at the back of this
installation and servicing manual for guidance on venting the pump.
7.4 PRESSURE RELIEF (SAFETY) VALVE OPERATION
Check the operation of the pressure relief (safety) valve as follows: 1.
Turning the head of the valve anticlockwise until it clicks. The
click is the safety valve head lifting off its seat allowing water to escape
from the system. 2. Check that the water is escaping from the system. 3. Top-
up the system pressure, as necessary.
! NOTE !
The air charge pressure may be checked using a tyre pressure gauge on the
expansion vessel Schraeder valve.
The vessel may be re-pressurised, when necessary, using a suitable pump. When
checking the air pressure, the water in the heating system must be cold and
the system pressure reduced to zero.
2. Check that the small cap (or screw) on all air vents is open at least one
turn. The cap (or screw) remains in this position from now on.
3. Ensure that the flexible filling loop is connected and that the double
check shut off valve connecting it to the water supply is closed. A valve is
open when the operating lever is in line with the valve, and closed when it is
at right angles to it.
4. Open the fill point valve.
5. Gradually open the double check valve from the water supply until water is
heard to flow.
6. When the needle of the pressure gauge is between 0.5 and 1.0 bar, close
the valve.
7. Vent each radiator in turn, starting with the lowest one in the system, to
remove air.
8. Continue to fill the system until the pressure gauge indicates between 0.5
and 1.0 bar. Close the fill point valve. The system fill pressure (cold)
should be 0.2 – 0.3 bar greater than the vessel charge pressure giving
typical system fill pressures of approx 0.5 bar for a bungalow and 1.0 bar for
a two storey house.
Refer to the Domestic Heating Design Guide for further information if
required.
Page 22
Section 7: Sealed Systems
7.5 SYSTEM MODELS
All System models have the following sealed system components factory fitted
(refer to Figure 7-3): · A diaphragm expansion vessel complying with BS 4814,
pre-
charged at 1.0 bar. Refer to Section 2.2.
· System pressure gauge, with an operating range of 1 to 4 bar.
· Pressure relief safety valve complying with BS 6759 and set to operate at
3.0 bar.
· Air vent, fitted to the flow pipe of the boiler, ensures the boiler is
vented.
· Filling loop. This must be isolated and disconnected after filling the
system.
Refer to Section 2.2 for system volumes and BS 7074: for further guidance and
for further details of the expansion vessel.
For information on the circulating pump fitted to sealed system models, please
refer to Appendix A1 at the back of this installation and servicing manual.
The expansion vessel fitted, is supplied with a charge pressure of 1.0 bar
(equivalent to a maximum static head of 10.2 metres). The charge pressure must
not be less than the actual static head at the point of connection.
! CAUTION !
! NOTE !
The air pressure in the vessel must be checked annually.
The central heating system volume, using the expansion vessel as supplied,
must not exceed the recommended value. Refer to Section 2.2. If the system
volume is greater, an extra expansion vessel (complying with BS 4841) must be
fitted as close as possible to the central heating return connection on the
boiler. The charge pressure of the extra vessel must be the same as the vessel
fitted in the boiler.
Refer to either BS 7074:1:1989 or The Domestic Heating Design Guide for the
required total expansion vessel volume for the system concerned.
! NOTE !
The air charge pressure may be checked using a tyre pressure gauge on the
expansion vessel Schraeder valve. The vessel may be re-pressurised using a
suitable pump. When checking the air pressure the water in the heating system
must be cold and the system pressure reduced to zero.
Do not pressurise the vessel above 1.5 bar.
Right hand side of heat exchanger
Automatic air vent
Pressure relief valve
Heating return
Expansion vessel
Pump
Heating Flow
Section 7: Sealed Systems
Figure 7-3: Sealed system components
Page 23
8 ELECTRICAL
! WARNING !
Ensure that the electrical supply has been isolated before making any
connections to the boiler.
8.1 GENERAL
Grant Vortex Wall Hung External models require a ~230V 1ph 50Hz supply. It
must be protected by a 5 Amp fuse. Refer to Figures 8-1 to 8-4 for typical
control system wiring diagrams for all models. Refer to Figures 8-5 and 8-6
for control panel wiring diagrams for all models.
! WARNING !
The Vortex boiler contains electrical switching equipment and must be earthed.
The supply must be fused at 5 Amp and there must only be one common isolator
for the boiler and control system, providing complete electrical isolation. A
fused double pole switch or a fused three pin plug and shuttered outlet socket
should be used for the connection. The power supply cable should be at least
0.75 mm² PVC as specified in BS 6500, Table 16. All the wiring and
supplementary earth bonding external to the boiler must be in accordance with
the current IET Wiring Regulations. Any room thermostat or frost thermostat
used must be suitable for use on mains voltage. In the event of an electrical
fault after installation of the boiler, the following electrical system checks
must be carried out: · Short circuit · Polarity · Earth continuity ·
Resistance to earth
! NOTE !
If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
The procedure is as follows:
1. Remove the casing door on the front of the external module.
2. Loosen the two screws securing the the control panel to the right hand
boiler casing panel, lift upwards and remove the control panel from the right
hand boiler casing panel.
3. Remove the two screws securing the back cover to the control panel (there
is one screw on each side of the control panel), slide the panel downwards to
disengage the locating tabs at the top of this panel and remove the panel to
gain access to the boiler terminal block.
4. Loosen/remove the screws securing the cable clamp on the top of the
control panel and open the clamp.
5. Route the supply and pump cables into the enclosure through one of the
designated entry points in the rear casing panel. (If a system model is being
installed, the pump cable comes pre-wired into the boiler terminal block).
6. Pass the mains power supply cable through the cable clamp, through the
cable grommet in the top of the control panel and connect to the boiler
control panel terminals as follows:
· Brown to mains live (terminal 2) · Blue to mains neutral (terminal 3) ·
Green/Yellow to mains earth (terminal 4) 7. If the circulating pump is to be
fitted inside the boiler enclosure, pass the 3-core cable from the pump
through the cable grommet and through the clamp and connect to the boiler
control panels as follows:
· Brown to pump live (terminal 7) · Blue to pump neutral (terminal 8) ·
Green/Yellow to pump earth (terminal 9)
! NOTE !
Connecting the pump in this manner allows the pump to be isolated using the
isolated switch inside the boiler control panel, for servicing and maintenance
work.
8. Make the remaining required connections to the control panel, as detailed
in Figures 8-1 to 8-4.
9. Tighten the cable clamp and refit the back of the control panel, taking
care not to trap any wires.
10. Refit the control panel to the right hand boiler casing panel.
! WARNING !
8.2 CONNECTING THE POWER SUPPLY
It is recommend that the boiler should be connected to a switched mains power
supply from a programmer or control system. A three core cable is required to
connect the boiler terminal block to the live supply. Refer to Figures 8-1 to
8-4 for typical control system wiring diagrams.
! NOTE !
Ensure that the route and length of the supply cable is such that the boiler
front cover plate can be easily removed without disconnecting the supply cable
from the terminal block.
After completing electrical connections and before reconnecting the electrical
supply to the boiler, replace the back cover on the control panel and secure
it using the screws provided. Take care not to trap any wires.
11. Re-connect the electrical supply and check operation of heating system
controls (programmer, room thermostats, etc.).
12. Refer to Instructions provided with the programmer for operation and
setting.
13. Leave the Programmer and Thermostat Instructions with the user after
installation for their future reference.
Page 24
Section 8: Electrical
BURNER LEAD PLUG/SOCKET CONNECTOR
On all models, the electrical cable between the boiler control panel and
burner is now fitted with an in-line 3-way plug and socket connector. This
enables the burner to be easily disconnected from the boiler control panel for
ease of removal and servicing.
! NOTE !
A Service switch is fitted to the control panel to allow the Service Engineer
to test-fire the boiler. When set to ON’ the switch temporarily by-passes the external control system to operate the boiler. This is a
momentary’ or non-latching switch that cannot be left set to ON.
The boiler will automatically revert to normal operation when 15 minutes have
elapsed since it was last operated. If required, this 15 minute override
period can be stopped by switching the boiler On / Off switch OFF and then
back to ON. The boiler will then operate as normal under control of the
external heating/hot water controls (timer, room thermostat or programmer).
8.3 FROST PROTECTION
The boiler is fitted with a pre-set internal frost protection thermostat. If
the air temperature around the boiler falls below 2°C, then this thermostat
will be activated to protect the boiler from freezing.
Also, to protect any exposed heating system pipework, it is recommended that
an `external’ frost thermostat is also installed. This frost thermostat will
operate in parallel with the internal frost protection of the boiler.
It should be sited within the house in such a place that it can detect any
rise and fall in the ambient air temperature, i.e. in a room with a radiator.
Where the frost thermostat is installed outside the house (to protect a boiler
installed in an external boiler room or garage) or in an attic, it is
recommended that it be used in conjunction with a pipe thermostat to avoid
unnecessary and wasteful overheating of the property. The pipe thermostat
should be located on the boiler return pipe, and set to operate at 25°C.
For connection details please refer to Figures 8-1 and 8-2.
! NOTE !
For total system protection against freezing, particularly during extended
periods without electrical power, Grant recommend the use of a combined
heating system antifreeze and corrosion inhibitor, used in accordance with the
manufacturer’s instructions.
Section 8: Electrical
Page 25
8.4 CONTROL SYSTEM WIRING DIAGRAMS
230 V 50 Hz
LN E
Grey
Green/Yellow
Grey Blue
Brown
HTG Motor
Orange
Blue
DHW Motor
Zone Valve Green/Yellow
Room Stat 21 3
Cylinder Stat
1C
Brown
Zone Valve Orange
12 3
45
67
8 9 10 wiring centre
HW HW CH OFF ON ON
N
L
E N Pump L
Supply to burner L
N
E
L LNE
LNE
1 2 3 4 5 6 7 8 9 10 11 12 13
Boiler Terminal Block
Figure 8-1: External wall hung – 2 X 2-port valve control system
Blue Green/Yellow
White Grey Orange
230 V 50 Hz
LNE
Room Stat 21 3
Cylinder Stat 1
C2
Mid Position Zone Valve
1 2 3 4 5 6 7 8 9 10 wiring centre
E N L
Pump
HW HW CH N L
OFF ON ON
Supply to burner L N E
L LNE
L NE L N E
1 2 3 4 5 6 7 8 9 10 11 12 13 Boiler Terminal Block
Figure 8-2: External wall hung – 3-port valve control system
Page 26
Section 8: Electrical
230 V 50 Hz
LN E
Grey
Green/Yellow
Grey Blue
Brown
HTG Motor
Blue Orange
DHW Motor
Zone Valve Green/Yellow
Room Stat 21 3
Cylinder Stat
1C
Brown
Zone Valve Orange
12 3
45
67
8 9 10 wiring centre
HW HW CH OFF ON ON
N
L
Supply to pump L N E
Supply to burner L N E
L L NE
L NEL N E
1 2 3 4 5 6 7 8 9 10 11 12 13
Boiler Terminal Block
Figure 8-3: External system wall hung – 2 X 2-port valve control system
Blue Green/Yellow
White Grey Orange
230 V 50 Hz
Room Stat 21 3
Cylinder Stat 1
C2
Mid Position Zone Valve
123
4
5
6
78
9 10 wiring centre
HW HW CH OFF ON ON
N
L
L LNE
Supply to Pump
L N E Supply to burner L
N E
LNE LNE
1 2 3 4 5 6 7 8 9 10 11 12 13 Boiler Terminal Block
Figure 8-4: External system wall hung – 3-port valve control system
Section 8: Electrical
Page 27
8.5 BOILER CONTROL PANEL WIRING DIAGRAMS
Test Switch
Red Red
Burner
4 core white insulation
Br L1 G/Y
Bl Blk
N
L2
L1 Br G/Y
N
Bl Blk
L2
Figure 8-5: External wall hung – wiring diagram
Switched live 1L
Permanent live 2 L
Mains neutral 3N
Mains earth 4E
5 link To CH valve if required 6
Pump live 7 L
Pump neutral 8 N
Pump earth 9 E
10 L
4 core white insulation
Blk
Bl 11 N
G/Y
12 E
13
Br
Blue
Y Blue
Red Mains On/Off Frost Thermostat Switch c/w neon
1 2
Blue
4B 5B Red
1A 2A Limit Thermostat
C
Yellow 2
Yellow Green/Yellow
Blue Red
C
1 Control Th ermostat
Green/Yellow
Red Green/Yellow
Green/Yellow
Earth to switch cover
Control panel chassis earth
Control panel chassis earth
Burner
4 core white insulation
Br L1 G/Y
Bl Blk
N
L2
Pump
L1 G/YBr
N
Bl Blk
L2
Switched live 1L
Permanent live 2 L
Mains neutral 3N
Mains earth 4E
5 link
To CH valve if required 6
Br 7 L Bl G/Y 8 N
9E
4 core white insulation
Blk
10 L
Bl 11 N
G/Y
12 E
13
Br
Blue
Y Blue
Test Switch
Red Red
Red Mains On/Off Frost Thermostat Switch c/w neon
1 2
Blue
4B 5B Red
1A 2A Limit Th ermostat
C Yellow
2
Yellow Green/Yellow
Blue Red
C
1 Control Th ermostat
Green/Yellow
Red Green/Yellow
Figure 8-6: External system wall hung – wiring diagram
Green/Yellow
Earth to switch cover
Control panel chassis earth
Control panel chassis earth
Page 28
Section 8: Electrical
9 FLUE SYSTEM AND AIR SUPPLY
The boiler is supplied with a flue terminal. Refer to Section 4.9 for fitting
details.
As an alternative to the terminal supplied, there is one other external flue
systems that can be used with the Vortex Eco External Wall Hung boiler
available from Grant UK; as follows:
GRANT VERTICAL GREEN SYSTEM
This vertical twin wall stainless steel insulated system replaces the low
level terminal supplied with the boiler, and may terminate at high level or
vertically as required.
! CAUTION !
It is important to ensure that the flue system is sealed and that condensate
cannot escape. Up to 1.5 l/h of condensate can be produced in a conventional
flue system. Do not use fire cement. The use of high temperature silicone
sealants is recommended.
This flue system is described in this section.
! NOTE !
9.1 AIR SUPPLY
A sufficient permanent air supply to the boiler should be provided for the
following reasons:
· For proper combustion of fuel and effective discharge of combustion products
to the open air.
· For the ventilation of any confined space in which the boiler is installed
to prevent overheating of the boiler and any equipment in and near the boiler.
Grant external boilers draw their air supply via the ventilation holes in
recessed top edge of the front door of the boiler casing. These ventilation
holes must not be obstructed.
Further details may be obtained from BS 5410-1.
9.2 CONVENTIONAL FLUE SYSTEMS
! NOTE !
Under no circumstances can Grant Vortex boilers be installed with existing
flue systems. Only flue systems and components suitable for wet flues should
be used.
Failure to install the correct type of flue system will invalidate the
guarantee.
Grant condensing boilers have high operating efficiencies and low flue gas
temperatures. Care must be taken to ensure the flue system is suitable for the
very low flue gas temperatures and condensate in the flue gases. Suitable
conventional flue systems are available from Grant UK. The flue must terminate
in a down draught free area, i.e. at least 600 mm above the point of exit
through the roof or preferably above the ridge level.
The condensate may be allowed to run back into the boiler. A condensate drain
at the base of the flue system is not required. The high level flue terminal
must be at least 600 mm from any opening into the building, and 600 mm above
any vertical structure or wall less than a horizontal distance of 750 mm from
the terminal.
The internal flue diameter for all models must be 100 mm (4 in). Twin wall
flues are recommended for externally run flues to reduce the possibility of
the condensate freezing in the flue. No part of any flue system should be made
of an asbestos material; aluminium must not be used in any part of the flue.
Only stainless steel flue components should be used. If the draught conditions
are satisfactory, the flue should terminate with a standard cowl.
Refer to the locally applicable Building Regulations, BS 5410-1 and OFTEC
Installation Requirements (OFTEC Books 2 and 3) for further guidance on
conventional flue systems.
To comply with the requirements of the Building Regulations Approved Document
J – conventional flue systems must have a flue data plate.
9.3 EXTERNAL CONVENTIONAL FLUE (GREEN SYSTEM)
The external system can terminate at either high level (with a 90° terminal)
or vertically (above roof level, with a vertical terminal) as required. The
vertical or high level terminal must terminate in accordance with BS 5410-1.
The minimum dimensions for locating the high level terminal from building
features (windows, doors, etc.) are shown in Figure 9-2 and given in Table
9-2. The Green system comprises of five insulated extension lengths, 45°
elbows, a vertical terminal and a high level horizontal terminal.
Locking bands are provided with all vertical extensions and terminals. Ensure
that the locking bands are fitted.
Two types of wall bracket are also available (standard and adjustable) to
support the vertical flue components.
The maximum vertical height (from the top of the boiler to the terminal) for
the 100mm diameter `Green’ system twin wall flue is 19 metres. Only three 45°
elbows may be used in the complete system.
If the flue terminal is fitted less than 2 metres above a surface to which
people have access, the terminal must be protected by a guard. The guard must
be manufactured from stainless steel and should be fitted centrally over the
flue terminal and securely fixed to the wall.
CONNECTION OF GREEN FLUE SYSTEM
1. Connect Grant Green system (100mm twin wall flue) to the boiler flue
outlet using the Grant External Module starter (product code: GKM90C).
2. Fit the starter piece into the boiler connector after first ensuring that
the seal is in place in the connector.
! NOTE !
Lubricate the seal on the boiler connector using the lubricant provided before
attempting to fit the starter piece.
Ensure that seals in all flue sections are lubricated before installing.
3. Assemble the remainder of the flue system as required, lubricating the
seal on each component before fitting and securing every joint with the
locking band provided.
The external vertical flue (Green system) components are available from Grant
UK and can be found in Figure 9-1 and Table 9-1.
Section 9: Flue System and Air Supply
Page 29
Vertical terminal
45° elbow High level 90° terminal Extension Extended wall bracket Starter
straight
Vertical terminal kit
45° elbow kit
High level terminal kit Extended wall bracket Wall bracket Locking band
Extension kits
Page 30
Starter straight
Figure 9-1: Green system
Table 9-1: Green system components – product codes
Item
Product code
150 mm extension
GX150/90
250 mm extension
GX250/90
450 mm extension
GX450/90
950 mm extension
GX950/90
195-270 mm adjustable extension
GXA250/90
45° elbow
GE45/90
High level terminal
GTH90
Vertical terminal
GTV90
Wall bracket – standard
GWB90
Wall bracket – extended
GEB90
External module starter straight
GKM90C
Section 9: Flue System and Air Supply
9.4 FLUE CLEARANCES
Figure 9-2: Flue clearances
Section 9: Flue System and Air Supply
Page 31
Table 9-2: Flue clearances
Ref
Location of outlet
Minimum distance (mm)
Pressure jet
Condensing
A
Directly below an opening, air brick opening, opening window, etc.
600
1,000 **
B
Horizontally to an opening, air brick opening, opening window, etc.
600
1,000 **
C
Below a gutter, eaves or balcony with protection
75 *
1,000 **
D
Below a gutter, eaves or balcony without protection
600
1,000 **
E
From vertical sanitary pipework
300
F
From an internal or external corner
300
G
Above ground or balcony level
300
H
From a surface or boundary facing the terminal
600
2,500 **
J
From a terminal facing the terminal
1,200
K
Vertically from a terminal on the same wall
1,500
L
Horizontally from a terminal on the same wall
750
M
Above the highest point of an intersection with the roof
600
N
From a vertical structure to the side of the terminal
750
O
Above a vertical structure less than 750 mm from the side of the terminal
600
P
From a ridge terminal to a vertical structure on the roof
1,500
Q
Above or to the side of any opening on a flat or sloping roof
300
R
Below any opening on a sloping roof
1,000
S
From oil storage tank (Class 1)
1,800 ***
A heat shield at least 750 mm wide must be fitted to provide protection of combustible material.
**
Clearances required by BS 5410-1:2019 to alleviate the effect of plume nuisance. If a risk assessment shows that there will be no impact from pluming,
then the `pressure jet’ figure could apply – seek confirmation from Local Authority Building Control.
Seek guidance from OFTEC Book 3 (Oil Storage and Supply).
NOTES 1. Appliances burning class D fuel have additional restrictions. Refer
to BS 5410-1:2019. 2. Vertical structure in N, O and P includes tank or lift
rooms, parapets, dormers, etc. 3. Terminating positions A to L are only
permitted for appliances that have been approved for low level flue discharge
when tested in accordance with BS EN 303-1, OFS A100 or OFS
A101. 4. Terminating positions should be at least 1.8 metres from an oil
storage tank (Class 1) unless a wall with at least 30 minutes fire resistance
and extending 300 mm higher and wider than
the tank is provided between the tank and the terminating position. 5. Where a
flue is terminated less than 600 mm away from a projection above it and the
projection consists of plastics or has a combustible or painted surface, then
a heat shield of at least
750 mm wide should be fitted to protect these surfaces. 6. If the lowest part
of the terminal is less than 2 metres above the ground, balcony, flat roof or
other place to which any person has access, the terminal should be protected
by a guard. 7. Notwithstanding the dimensions given above, a terminal should
not be sited closer than 300 mm to combustible material. In the case of a
thatched roof, double this separation distance
should be provided. It is also advisable to treat the thatch with a fire
retardant material and close wire in the immediate vicinity of the flue. 8. A
flue or chimney should not pass through the roof within the shaded area
delineated by dimensions Q and R. 9. Where protection is provided for plastics
components, such as guttering, this should be to the standard specified by the
manufacturer of the plastics components. 10. Terminals must not be sited under
car ports. 11. Terminals at low levels (terminals under 2.1 metres) have more
restrictive recommendations and should not be positioned near public footways,
frequently used access routes, car
parking spaces less than 2.5 metres from the terminal or patio’s (hard surface
area).
Further guidance can be obtained from BS 5410-1:2019, OFTEC Book 4
(Installation) and Approved Document J.
Grant UK flue products are fully compliant with the CE (Communauté
Européenne/European Community) standards having undergone rigorous product
testing.
Page 32
Section 9: Flue System and Air Supply
10 COMMISSIONING
To ensure safe and efficient operation, it is essential that a Grant Eco Wall
Hung boiler is commissioned as detailed in the following procedure. To access
the controls, remove the front door from the boiler. Turn the knob at the
bottom of the front door anticlockwise and pull the door outwards at the
bottom. Carefully release the top of the front door panel from under the top
casing panel flange and remove it from the boiler to reveal the boiler as
shown in Figure 10-1. The controls are shown in Figure 10-2.
Figure 10-1: Boiler with front panel removed
Figure 10-2: Boiler controls
Section 10: Commissioning
Page 33
10.1 BEFORE SWITCHING ON
1. Ensure the boiler is isolated from the electrical supply and the boiler
ON/OFF switch is set to OFF.
2. Check that the high limit thermostat bulb and boiler thermostat bulb are
correctly located in their respective pockets. See Figure 4-1. Check condition
of both thermostat capillaries. Ensure they are not damaged, broken, kinked or
crushed.
3. Remove the nuts and washers securing the front cleaning door. Withdraw the
door take care as it is heavy!
4. Check that the turbulators are in position and that the ends are vertical.
Refer to Figure 11-2.
5. Check that the baffles are in position. Refer to Figure 11-1.
6. Refit cleaning door and check that it is fitted correctly and that a good
seal is made.
7. Unscrew the burner fixing nut (located at the top of the mounting flange),
rotate the burner clockwise and remove the burner from the boiler.
The burner has a slotted lug on the underside of the fan housing. This allows
the burner, when removed from the boiler, to be hung on the bolt on the front
of the combustion door for checking/servicing.
10.2 BURNER SETTINGS
With the burner removed from the boiler: 1. Remove the burner head. Refer to
Figure 10-3. Loosen the
two fixing screws (1) and remove head (2) from the burner.
1 2
3 5
7 4
6 1
6
! NOTE !
With two flexible hoses connected to the burner, identify (mark if necessary)
which is the inlet and return if they are to be disconnected.
8. Check/adjust the burner settings as described in Section 10.2.
9. Re-fit the burner to the boiler and tighten the fixing nut. DO NOT
OVERTIGHTEN!
10. Check that sealed system has been vented and pressurised and that there
are no leaks.
11. Ensure the air vent on the condensing heat exchanger is open. Refer to
Section 7.
12. Check that all fuel line valves are open.
13. Connect a combined vent manifold and pressure gauge to the pressure gauge
connection port on the oil pump (item 6, Section 11.7). Open the vent screw on
the vent manifold to vent the supply while the pump is running.
14. Check that all system controls are calling for heat and turn the boiler
thermostat to maximum.
Figure 10-3: Burner head, diffuser and nozzle holder
2. Check the nozzle (7) is correct for the required boiler output. Refer to
Table 2-3 for the correct nozzle size and type for the required boiler output.
3. If the nozzle needs to be replaced remove the diffuser/ electrode
assembly. Refer to Figure 10-3. · Using a 3 mm Allen key, loosen the diffuser
fixing screw (3) on the electrode assembly. · Lift the diffuser/electrode
assembly (5) up and off the nozzle holder.
· Disconnect both ignition leads (4) from the electrodes. 4. Use a 16mm
spanner to remove /re-fit the nozzle, whilst
holding the nozzle holder (6) using another 16mm spanner.
! CAUTION !
The use of an ill-fitting spanner will damage the nozzle and could lead to an incorrect flame pattern and poor combustion.
Page 34
! NOTE !
Ensure that the nozzle is securely tightened so it does not leak but DO NOT
OVERTIGHTEN!
5. Re-fit the diffuser/electrode assembly. Refer to Figure 10-3. · Re-connect
ignition leads (4) to electrodes. · Re-fit the diffuser/electrode assembly (5)
onto the nozzle holder (6) lining up the fixing screw (3) with the with the
recess in the nozzle holder. · Ensure diffuser assembly is fitted down hard
onto the shoulder on the nozzle holder. · Tighten the fixing screw (3) to
secure the diffuser/ electrode assembly (5) in place on the nozzle holder (6).
! NOTE !
Do not overtighten the fixing screw as this may damage the electrode
insulator.
6. Check/adjust the electrode setting. Refer to Figure 10-4. Always check the
electrode settings after replacing the nozzle.
Section 10: Commissioning
A
= =
2
A
Check the distance beetwen tips of electrodes.
A-A
Check the distance beetwen nozzle/electrodes and diffuser/electrodes.
Figure 10-4: Ignition electrode settings
7. Re-fit the burner head. Refer to Figure 10-3. · Locate the head fixing
screws in the countersunk slots in the burner collar (1). · Check/adjust the
electrode setting. Refer to Figure 10-4. · As the head will only fit one way,
rotate the head until the two screws align with the slots.
· Tighten the two screws to secure the head (2) in position on the burner.
8. Check/adjust the diffuser position. Refer to Figure 10-5.
! NOTE !
The distance between the end of the burner head and the front face of the
diffuser (D) MUST be correctly set for the burner to operate correctly.
· Refer to Table 2-3 for the required distance (diffuser setting) for the
boiler output required. This is the distance from the front face of the nozzle
to the internal shoulder of the burner head. Refer to Figure 10-5.
· Check the distance using the gauge supplied with the burner.
– Position the gauge on the internal shoulder of the burner head so the leg
for the required output is pointing towards the nozzle.
– Check that the gauge is at 90°to the internal shoulder of the burner head
and across the full diameter.
– If the diffuser setting is correct, the tip of the gauge leg will just touch
the front face of the nozzle, with the gauge still in contact with the
internal shoulder of the burner head on BOTH sides. Refer to Figure 10-5.
– If the gauge leg is in contact with the nozzle face but the gauge is NOT in
contact with the internal shoulder of the burner head on BOTH sides, the
diffuser must be opened’ (see below). – If the gauge leg does not reach the nozzle with the gauge is in contact with the internal shoulder of the burner head on BOTH sides, the diffuser must be
closed’ (see below).
· To adjust the diffuser position: – If necessary, adjust the diffuser
position by rotating the adjustment screw, located on the front of the burner,
using a 4mm Allen key. Refer to Section 11.7. Re-check the diffuser setting
using the gauge, as described above.
– To increase the distance between the nozzle face and internal shoulder of
the burner head (to open the diffuser): rotate the adjusting screw clockwise.
– To decrease the distance between the nozzle face and internal shoulder of
the burner head (to close the diffuser): rotate the adjusting screw
anticlockwise.
! NOTE !
One full rotation of the adjuster screw is approximately 1mm of diffuser (and
nozzle) movement.
! NOTE !
It is essential that the final position of the diffuser is checked, using the
gauge provided with the boiler, and the diffuser adjusted as necessary to
achieve the required position.
Check the distance beetwen nozzle and recirculation pipe.
Figure 10-5: Checking the diffuser position using the guage provided
· The three possible boiler output settings are stamped on three of the legs
of the gauge.
· To use the gauge: – Identify the correct leg of the gauge that matches the
required boiler output.
10.3 SWITCHING ON
1. Check that all system controls are calling for heat and turn the boiler
thermostat to maximum.
2. Switch on the electricity supply to the boiler.
3. Set the boiler On/Off switch to ON. A Neon on the switch lights when it is
in the ON position. The boiler will now light automatically. Note that the
neon lights when the boiler is switched on, but does not necessarily indicate
that the burner is firing. The burner should then fire. Open the vent screw on
the vent manifold to vent the supply while the oil pump is running.
4. The burner fan should start and the burner should light within about 12
seconds. If the burner does not light and the `Lockout’ reset button on the
burner lights, wait about 45 seconds and press the reset button to restart the
ignition process.
This procedure may have to be repeated several times during first lighting. 5.
With the burner alight, check the fuel pressure. Refer to Section 2.3 (burner
settings). 6. Adjust the pressure if necessary.
! NOTE !
It is important that the oil pressure is correctly set.
Section 10: Commissioning
Page 35
7. Operate the boiler until it reaches normal operating temperature. Check
oil supply/return pipe for leaks, rectifying where necessary.
8. Check the operation of the boiler thermostat. Ensure that by turning it
anticlockwise it switches the burner off.
9. With the burner alight, re-check the fuel pressure and readjust if
necessary. Turn the boiler off, remove the pressure gauge and replace the plug
in the pump.
10. Ensure that there are no oil leaks.
11. On balanced flue installations ensure the flexible air inlet tube and
the flexible air tube is connected to both the burner air inlet and the flue
system.
10.4 RUNNING THE BOILER
1. Relight the boiler and allow it to run for at least 20 minutes.
2. Check the smoke number, if it is 0-1 then it is satisfactory. 3. Using a
calibrated electronic flue gas analyser, set to the
correct fuel, check the %CO2 in the flue gases.
! NOTE !
To allow the boiler to be commissioned and serviced correctly a combustion
test point is provided on the front cleaning door. Both the %CO2 and smoke
test may all be carried out using this test point.
This test point is not suitable for measuring boiler efficiency or
conventional flue draught.
4. When using the test point on the cleaning cover note that the flue gas
temperature reading will be higher than that measured in the flue thus
resulting in an inaccurate efficiency reading. To obtain an accurate flue gas
temperature and efficiency, the reading can only be measured outside through
the low level flue terminal (or the test point on the conventional flue
starter section when used).
5. For high level and vertical balanced flues, the reading may be taken from
the flue test point provided on the flue system.
6. For conventional flues, a test point is provided in the conventional flue
adaptor for flue draught and flue gas temperature measurement.
7. Set the %CO2, as indicated on the flue gas analyser, to the required value
as given in Section 2.3 for the boiler concerned.
8. Adjust the burner air damper, using the hexagonal key supplied, to achieve
the required %CO2. Refer to Section 11.7.
9. To increase the %CO2: · Turn the screw anti-clockwise. This will close
down the burner air damper and decrease the combustion air entering the
burner.
To decrease the %CO2: · Turn the screw clockwise. This will open up the burner
air damper and increase the combustion air entering the burner.
10. When the %CO2 is set to the correct level, re-check the smoke number if
the burner air damper has been moved. Under no circumstances must the smoke
number be above 1.
! NOTE !
For safe and efficient operation of the boiler it is essential that the air
damper is correctly set to give the required %CO2 in the flue gases.
10.5 BALANCING THE SYSTEM
1. When the boiler has been adjusted and is running satisfactorily, balance
the central heating system by adjusting the radiator lock shield valves. Start
with the radiator nearest the boiler and adjust the valves to achieve the
required temperature drop across each radiator. If thermostatic radiator
valves have been installed, check the system by-pass.
2. Switch off the boiler.
10.6 COMPLETION
1. With the system hot, check again for leaks, rectifying where necessary.
Drain the system while it is hot to complete the flushing process. Refill and
vent the sealed system.
2. A suitable central heating system inhibitor must be added to protect the
system against the effects of corrosion.
3. A suitable antifreeze should be used to prevent damage to the boiler in
areas where electrical power failure can occur in winter months.
4. Replace the front door in the boiler casing.
! NOTE !
After commissioning the boiler complete the OFTEC CD/11 commissioning report.
Leave the top copy with the User and retain the carbon copy.
If the boiler is to be left in service with the User, set the controls, remote
programmer and room thermostat to the User’s requirements. If the boiler is
not to be handed over immediately, close the boiler fuel supply valve and
switch off the electricity supply.
! CAUTION !
If there is any possibility of the boiler being left during frost conditions,
then the boiler and system should be drained. Alternatively, a suitable
heating system antifreeze should be used.
10.7 INFORMATION FOR THE USER
The User must be advised (and demonstrated if necessary) of the following
important points:· How to start and switch off the boiler and how to operate
the
system controls. · The precautions necessary to prevent damage to the central
heating system and to the building, in the event of the boiler not being in
operation during frost conditions. · The importance of servicing the boiler to
ensure safe and efficient operation. This should normally be required only
once a year. · The type of fuel used. · That any servicing or replacement of
parts must only be carried out by a suitably qualified engineer. · Ensure that
the boiler controls and room thermostat (if fitted) are set to the User’s
requirements. · Tell the User the system pressure and show them the position
of the safety valve discharge pipe. · Show the User how to reset the overheat
thermostat and how to restart the boiler if it goes to `Lockout’.
Page 36
Section 10: Commissioning
11 SERVICING
To ensure efficient operation of the boiler it is essential that a Grant
Vortex Eco Wall Hung boiler is serviced at regular intervals of no longer than
12 months. Servicing and replacement of parts must only be carried out by a
suitably qualified engineer.
! CAUTION !
Details of every service should be entered in the Service Log, in the Boiler
Handbook.
This information may be required to validate the Grant extended guarantee.
! WARNING !
Before starting any work on the boiler, or fuel supply please read the Health
and Safety information given in Section 15 of these instructions.
11.1 CHECKS BEFORE SERVICING
The following sequence of checks should be made before starting any servicing
work: 1. Check the flue terminal and ensure it is not blocked or
damaged. 2. Run the boiler and check the operation of its controls. 3. Ensure
that all water system connections and fittings are
sound. Remake any joints and check the tightness of any fittings that may be
leaking. 4. Allow the boiler and system to cool down. 5. If the boiler is used
on a sealed central heating system, check the system pressure, check the
operation of the pressure relief valve and check the expansion vessel air
charge. Refer to Section 7. 6. Refill, vent and re-pressurise the system as
necessary. Refer to Section 7. 7. Check that any ventilation openings are of
adequate free area and are clear. Refer to Section 9.1. 8. Remove any
sludge/water from the fuel tank by opening the sludge valve at the lower end
of the tank (if fitted). 9. Ensure that all fuel system connections and
fittings are sound. Remake any joints and check the tightness of any fittings
that may be leaking. 10. With the fuel supply valve (at the oil tank) closed,
clean/ replace the filter element and clean the filter bowl.
11.2 DISMANTLING PRIOR TO SERVICING
The procedure for dismantling the boiler is as follows:
1. Remove the front door from the boiler.
Turn the knob at the bottom of the front door anticlockwise and pull the door
outwards at the bottom. Carefully release the top of the front door panel from
under the top casing panel flange and remove it from the boiler casing to
reveal the boiler as shown in Figure 10-1.
2. On System models, carefully lift up and remove the expansion vessel from
the boiler. Place the vessel on the front of the boiler. A clip is fitted to
clip it on to the top front edge of the casing.
3. Unscrew the burner fixing nut (top of mounting flange) and rotate the
burner clockwise and withdraw the burner from the boiler.
The burner has a slotted lug on the underside of the fan housing. This allows
the burner, when removed from the boiler, to be hung on the bolt on the front
of the combustion door for checking/servicing. 4. If required, disconnect the
flexible oil line(s), using a suitable container to prevent any oil spillage.
5. Check or replace the flexible fuel supply hose(s), as follows: · Braided
flexible fuel supply hoses (as supplied with the boiler) should be replaced
annually i.e. when the boiler is serviced.
· Long-life hoses should be inspected annually. If in doubt replaces the
hose(s). In any event, these hoses must be replaced every five years.
! NOTE !
With a two-pipe oil supply there will be two flexible hoses connected to the
burner. Identify (mark if necessary) which is the inlet and return if they are
to be disconnected.
! WARNING !
Before servicing, set the boiler On/Off switch to OFF, isolate the electricity
supply and close the fuel supply valve.
The data label on the inside of the case side panel will indicate the fuel
used and the nozzle fitted.
Section 11: Servicing
Page 37
11.3 CLEANING THE BOILER
The procedure for cleaning the boiler is as follows: 1. Remove the nuts and
washers securing the front cleaning
door and withdraw the door. Take care it is heavy. 2. Remove the baffles as
shown in Figure 11-1.
8. Clean the turbulators using a stiff brush. 9. Test the heat exchanger
condensate drain by pouring water
into one of the lower tubes and observe whether the water discharges from the
22mm condensate outlet. Replace the turbulators.
10. Replace the front cleaning door, ensuring the seal is in good condition
and secure it in position with the nuts and washers previously removed.
Tighten to form a seal.
11. Remove the condensate trap and check that it is not blocked and is
operating correctly, i.e. the float is free to move. Clean the trap and float
as required. Refer to Section 6.8.
12. Check that the boiler condensate outlet is unobstructed. Clean if
necessary.
! NOTE !
The condensate trap and condensate outlet must be checked on every service and
cleaned as necessary.
11.4 CLEANING THE BURNER
With the burner removed from the boiler:
1. Remove the burner head. Refer to Figure 10-3. Loosen the two fixing screws
(1) and remove head (2) from burner.
2. Clean the burner head.
3. Remove the diffuser/electrode assembly. Refer to Figure 103.
· Using a 3mm Allen key, loosen the diffuser fixing screw (3) on the
diffuser/electrode assembly (5).
· Lift the diffuser/electrode assembly up and off the nozzle holder (6).
· Disconnect both ignition leads (4) from the electrodes.
4. Refer to figure 10-3. Replace the nozzle (7). The nozzle should always be
replaced on an annual service. Refer to Table 2-3 for the correct nozzle size
and type for the required boiler output. Do NOT attempt to clean the nozzle.
Use a 16 mm spanner to remove/re-fit the nozzle, whilst holding the nozzle
holder using another 16 mm spanner.
Figure 11-1: Removing the baffles 3. Remove all deposits from the baffle
plates and all the boiler
internal surfaces using a stiff brush and scraper if necessary. 4. Check the
condition of the flue, clean as necessary. 5. Check the condition of the front
cleaning door seal and
replace if necessary. 6. Replace the baffles, ensuring they are correctly
fitted. Refer
to Figure 11-1. 7. Pull out the spiral turbulators from the heat exchanger
tubes.
(Refer to Figure 11-2).
Position in vertical plane
IMPORTANT: The ends of the turbulators must be vertical
! CAUTION !
The use of an ill-fitting spanner will damage the nozzle and could lead to an
incorrect flame pattern and poor combustion.
! NOTE !
Ensure that the nozzle is securely tightened so that it does not leak but DO
NOT OVER TIGHTEN!
5. Inspect the ignition electrodes remove the electrode fixing screw and
withdraw the electrode assembly. Wipe clean and check for any cracks on the
insulation. Replace if necessary.
6. Re-fit the diffuser/electrode assembly. Refer to Figure 10-3. · Re-connect
ignition leads (4) to electrodes. · Re-fit the diffuser/electrode assembly (5)
onto the nozzle holder (6) lining up the fixing screw (3) with the recess in
the nozzle holder. · Ensure diffuser/electrode assembly is fitted down hard
onto the shoulder on the nozzle holder. · Tighten the fixing screw (3) to
secure the diffuser/ electrode assembly (5) in place on the nozzle holder (6).
! NOTE !
Figure 11-2: Turbulators
Do not overtighten the fixing screw as this may damage the electrode insulator.
Page 38
Section 11: Servicing
7. Check/adjust the electrode setting. Refer to Figure 10-4.
Always check the electrode settings after replacing the nozzle.
8. Re-fit the burner head. Refer to Figure 10-3.
· Locate the head fixing screws in the countersunk slots in the burner collar
(1).
· Check/adjust the electrode setting. Refer to Figure 10-4.
· As the head will only fit one way, rotate the head until the two screws
align with the slots.
· Tighten the two screws to secure the head (2) in position on the burner.
9. Adjust the diffuser position. Refer to Figure 10-5.
! NOTE !
The distance between the end of the burner head and the front face of the
diffuser (D) MUST be correctly set for the burner to operate correctly.
· Refer to Table 2-3 for the required distance (diffuser setting) for the
boiler output required. This is the distance from the front face of the nozzle
to the internal shoulder of the burner head. Refer to Figure 10-5.
· Check the distance using the gauge supplied with the burner.
· The three possible boiler output settings are stamped on three of the legs
of the gauge.
· To use the gauge:
– Identify the correct leg of the gauge that matches the required boiler
output.
– Position the gauge on the internal shoulder of the burner head so the leg
for the required output is pointing towards the nozzle.
– Check that the gauge is at 90°to the internal shoulder of the burner head
and across the full diameter.
– If the diffuser setting is correct, the tip of the gauge leg will just touch
the front face of the nozzle, with the gauge still in contact with the
internal shoulder of the burner head on BOTH sides. Refer to Figure 10-5.
– If the gauge leg is in contact with the nozzle face but the gauge is NOT in
contact with the internal shoulder of the burner head on BOTH sides, the
diffuser must be opened’ (see below). – If the gauge leg does not reach the nozzle with the gauge in contact with the internal shoulder of the burner head on BOTH sides, the diffuser must be
closed’ (see below).
· To adjust the diffuser position:
– If necessary, adjust the diffuser position by rotating the adjustment screw,
located on the front of the burner, using a 4mm Allen key. Refer to Section
11.7. Re-check the diffuser setting using the gauge, as described above.
– To increase the distance between the nozzle face and internal shoulder of
the burner head (to open the diffuser): rotate the adjusting screw clockwise.
– To decrease the distance between the nozzle face and internal shoulder of
the burner head (to close the diffuser): rotate the adjusting screw
anticlockwise.
! NOTE !
It is essential that the final position of the diffuser is checked, using the
gauge provided with the boiler, and the diffuser adjusted as necessary to
achieve the required position.
10. Continue cleaning the other burner components as detailed in Section 11.5
11.5 CLEANING THE BURNER: OTHER COMPONENTS
Photocell The photocell is a push-fit in the front of the burner body. 1.
Holding the body of the photocell and NOT the cable,
carefully pull the photocell out of the burner. 2. Clean the sensor end of the
photocell. 3. Replace photocell back in the burner and check that it is fully
pushed in. Burner air inlet This is located on the right hand side of the
burner. Refer to Section 11.7. 1. Using a 4mm Allen key, unscrew and remove
the two screws
and remove the air inlet from the burner. 2. Check inside and remove any
debris, leaves, hair, fluff, etc.
from the air inlet housing and air damper. Burner fan housing This is located
over the fan impeller. Refer to Section 11.7. With the burner air inlet
already removed: 1. Using a 4mm Allen key, unscrew and remove the four screws
and remove the fan housing from the burner. 2. Check and clean the fan
impeller and remove any debris,
leaves, hair, fluff, etc. 3. Check the fan housing is clean and clean as
required. 4. Check the rubber seal around the fan housing. Replace if
damaged or missing. 5. Re-fit the fan housing to the burner and secure with
the four
screws. 6. Re-fit the burner air inlet to the burner and secure with the
two screws. Oil pump filter This is located under the end cover on the oil
pump. Refer to Section 11.7. 1. Using a 4mm Allen key, unscrew and remove the
four cap
screws securing the pump end cover. Remove end cover from pump. 2. Remove the
filter and wash in kerosene. 3. Check the O-ring seal around the end cover.
Replace if damaged. 4. Refit the filter and end cover. 5. Re-fit the four cap
screws, tighten evenly, to secure the end cover.
11.6 RECOMMISSIONING
! WARNING !
! NOTE !
One full rotation of the adjuster screw is approximately 1mm of diffuser (and
nozzle) movement.
To ensure safe and efficient operation of the boiler it is important that re-
commissioning is carried out, especially
combustion checks (%CO2 level, flue gas temperature and smoke number) after
the boiler has been serviced. Refer to
the Commissioning instructions in Section 10.
Section 11: Servicing
Page 39
11.7 BURNER COMPONENTS (ECOFLAM MAX 1 LN)
3
10
9
2
8
5
6
4 7
6
11
Item 1 2 3 4 5 6 7 8
15
Description Oil pump
Air damper adjustment screw Reset / “lockout” button Photocell Control box
Pump pressure adjustment screw Pressure gauge connection point
Combustion head
16
1
12
Item 9 10 11 12 13 14 15 16
13 14
Description Mounting flange
Air inlet Motor Motor ignition capacitor Fuel suction line Fuel return line
Diffuser adjustment screw Solenoid coil
Page 40
Section 11: Servicing
12 FAULT FINDING
12.1 BOILER FAULT FINDING
Always isolate the electricity supply to the boiler before working on the
boiler.
Table 12-1: Boiler fault finding Fault Boiler will not start: No fuel supply.
No electricity supply. Burner not starting – fuel and electricity supplies
present. Burner lights but goes to lock-out. Boiler works but: 1. Visible
smoke from flue or high smoke number.
2. Burner pulses.
3. Flame slow to stabilise during start up.
4. Water temperature low. 5. Boiler operating on overheat thermostat. 6.
Fumes and puffing during starting (conventional flue) 7. Oil odours. 8.
Combustion fumes smell.
Remedies
Ensure that an adequate supply of fuel is available and that the fuel supply
valve is open. Check the condition of the fuel filter, clean if necessary.
Ensure fuel supply is reaching burner and vent pump. Check that the fire valve
has not operated to shut off the oil supply.
Ensure electricity supply to the boiler is switched on and that all controls
are calling for heat. Ensure that the overheat thermostat has not tripped,
reset if necessary. Check that a mains supply is present at the burner
terminal block. If not, check the boiler and overheat thermostat.
Press the reset button on the burner control box if it is lit. Refer to burner
fault finding charts.
If the flame is unstable, check the combustion settings. Refer to burner fault
finding charts.
Insufficient air supply – check the air damper setting and the condition of
the fan. Check room ventilation is adequate, see Section 9.1. Check the nozzle
size and type. Fuel pressure may be too high – check and adjust.
Insufficient air supply – check the air damper setting and the condition of
the fan. Check room ventilation is adequate, see Section 9.1. Check the nozzle
size and type.
Insufficient air supply – check the air damper setting and the condition of
the fan. Check room ventilation is adequate, see Section 9.1. Check the nozzle
size and type. Fuel pressure may be too low – check and adjust. Insufficient
draught – clean boiler heat exchanger and check condition of flue.
Undersized nozzle and/or low fuel pressure. Check condition of boiler heat
exchanger and clean if necessary. Check the boiler thermostat. Check the
combustion settings. Check the condition of the fuel filter.
Faulty boiler thermostat. No circulation, check circulating pump. Check for
air lock.
Check the condition of the chimney, ensure it is not blocked and is high
enough to produce the required draught. Check that there is an adequate air
supply near the burner and that a kitchen fan is not drawing products out of
the burner.
Check all fuel line connections, remake as necessary.
Check boiler cleaning cover and seal are correctly fitted. Check burner is
correctly fitted onto flange. Check flue is correctly sealed into flue outlet
of boiler. Check the condensate pipe and trap are operating correctly.
! NOTE !
For an overview of the fault diagnostic capabilities built into the
circulating pump that comes installed in the sealed system boiler models,
please refer to Appendix A1 at the back of this installation and servicing
manual.
Section 12: Fault Finding
Page 41
12.2 BURNER FAULT FINDING CHARTS 12.2.1 BURNER FAILS TO START, NO FLAME, NO LOCK OUT
Symptoms
Possible causes
Actions
Motor fails to run Lock-out light not lit
No electrical supply to boiler Fuse has blown
Check ON/OFF switch is ON – mains neon is lit
Check or replace fuse If fuse has blown – check reason for failure
Boiler thermostat not calling
Adjust boiler thermostat to call for heat
Heating controls are not calling
Adjust programmer and room thermostat to call
Overheat thermostat has operated
Check and reset overheat thermostat if required If operated – check reason for operation
No power to burner
Check for 230 volts at control box mains terminals
Control box faulty
Replace faulty control box
12.2.2 BURNER FAILS TO START, NO FLAME, GOES TO LOCKOUT
Symptoms
Possible causes
Actions
Motor fails to run Burner lockout
No power to burner motor Burner motor capacitor faulty
Check for 230 volts at motor plug terminals Check and replace if necessary
Burner motor faulty
Replace burner motor
Burner motor stalled Seized oil pump
Check and replace faulty oil pump
Page 42
Section 12: Fault Finding
12.2.3 BURNER STARTS, NO FLAME, GOES TO LOCKOUT
Symptoms
Possible causes
Actions
Motor runs Burner pre-purges Burner does not fire Burner lock-out
Flame instability Carbon / soot on combustion head No oil pressure
Low oil pressure Excessive combustion air Excessive flue draught (CF only)
Clean blast tube Check pump drive coupling – replace if failed Check oil pump pressure is correct Adjust air damper setting Rectify condition
False light
Check photocell is not sensing ambient light
No ignition spark
Check HT lead connections are sound Check ignition electrode gap is correct Check for 230 volts at ignition transformer Check transformer – replace if faulty
No oil at nozzle
Check for sufficient fuel in tank Check fire valve has not tripped Check all oil supply valves are open Check oil line and pump is not air-locked Check operation of solenoid valve Check pump drive coupling – replace if failed Check fuel pump – replace if seized
Restriction in oil supply
Check filters, valves and oil lines and rectify
Fuel contamination (water in tank)
Check tank, filters and oil line for water
12.2.4 BURNER FIRES, GOES TO LOCKOUT
Symptoms
Possible causes
Motor runs Burner pre-purges Burner fires Burner lockout
Flame instability Carbon / soot on combustion head Fuel contamination (water
in tank)
Low oil pressure Excessive combustion air Excessive flue draught (CF only)
Photocell not sensing light
Photocell failed
Defective nozzle
Actions
Clean combustion head Check tank, filters and oil line for water Check oil
pump pressure and adjust if necessary Adjust air damper setting Rectify
condition Check photocell is clean and unobstructed Replace faulty photocell
Replace nozzle
Section 12: Fault Finding
Page 43
12.2.5 DELAYED IGNITION, BURNER STARTS VIOLENTLY
Symptoms
Possible causes
Actions
Burner pulsates on start up
Excessive combustion air
Recommission burner – adjust air setting
Low oil pressure
Check and recommission burner
Partially blocked nozzle
Replace nozzle
Fuel contamination (water in tank)
Check tank, filters and oil line for water
Fan slipping on shaft
Check and re-tighten
Pump coupling loose or worn
Check and replace
Burner starts violently
Delayed ignition
Check electrode settings Check electrodes for damage Check HT lead connections are sound Check HT leads for damage or arcing
12.2.6 BURNER CYCLES ON AND OFF
Symptoms
Possible causes
Burner firing Burner stops firing Pre-purge starts Burner fires Burner stops firing
Restriction in oil supply Fuel contamination (water in tank) Partially blocked nozzle Vitiated combustion air (balanced flue only)
Boiler thermostat hunting
Actions Check filters, valves and oil lines and rectify
Check tank, filters and oil line for water
Replace nozzle
Disconnect snorkel tube and check operation Check flue terminal for
obstructions and rectify Check flue system for leaks and rectify
Replace faulty thermostat
Page 44
Section 12: Fault Finding
13 SPARE PARTS
13.1 BOILER PARTS LIST
Table 13-1: Boiler parts list Description
Cleaning door nut and washer set Double pole switch
Baffle set (complete) – all Wall Hung models Turbulator baffle – all Wall Hung
models Combustion Door – all Wall Hung models
Cleaning door rope seal – all Wall Hung models Limit thermostat (110°C) c/w
Earth wire
Control thermostat (50 – 75°C) c/w Earth wire Wilo Yonos Para RKS HE
circulating pump (7 m head) – all models
between April 2015 and November 2019 WIlo Para SC HE circulating pump (7m
head) –
all models from November 2019 Automatic Air Vent
Low Pressure Switch Upgrade Kit (Wall Hung External models)
13.2 SEALED SYSTEM PARTS LIST
Table 13-2: Sealed system parts list Description
Expansion vessel (8 litre) – all Wall Hung models Water pressure gauge
Pressure relief valve (3.0 bar) Pressure relief valve with pressure gauge port
(3.0 bar)
Expansion vessel flexible hose Filling Loop Kit
Grant UK product code EFBS14 EFBS19 WBS03 WBS01 WBS04 WBS05 VBS147 VBS146
VBS126
VBS159 MPCBS29 MPCBS63/A
Grant UK product code WBS07 VBS08
MPCBS123 MPCBS124
WBS08 VBS35
Section 13: Spare Parts
Page 45
13.3 ECOFLAM MAX 1 LN BURNER
This section gives exploded views of the Ecoflam Max 1 low NOx yellow flame
burners in the Grant Vortex Eco Wall Hung boilers, and parts lists associated
with them.
0170 0290
0270 0120
0140
Figure 13-1: Ecoflam Max 1 low NOx yellow flame burner exploded diagram
0150
0030 0090 0080 0130 0310 0100 0110
0180 0260 0250 0160
0300 0020 0010 0050
0200 0280 0220 0190 0210 0240 0230
Page 46
Section 13: Spare Parts
Page 47
Section 13: Spare Parts
Table 13-3: Ecoflam Max 1 low NOx burner parts list
Key No.
Description
0010
Oil pump (Danfoss BFP11 R3
0020
Coil (Danfoss BFP T85)
0030
Coupling
0050
Hoses
0080
Motor
0090
Capacitor (4 F)
0100
Ignition transformer
0110
Control box with cables
0120
Photoresistor
0130
Support
0140
Plug and cable
0150
Fan
0160
O-ring
0170
Cover air inlet
0180
Cables
0190
Electrodes
0200
Combustion head (16-21)
0210
Nozzle holder
0220
Diffuser (16-21)
0230
Conveyor
0240
Rod
0250
Flange
0260
Gasket
0270
Oil pipe
0280
Nozzle – 0.50/80°EH Nozzle – 0.60/80°EH
0290
Ring
0300
Set filter and seal
0310
Gauge
Ecoflam product code 65322968 65327293 65322920 65327402 65326747 13011117 65323257 65327403 65327404 65327405 65327406 65323826 65321066 65327407 65320934 65327306 65327409 65327410 65327412 65327413 65327414 65320975 65321089 65327415 65320513 65325684 65327489
Grant product code EBS65322968 EBS65327293 EBS65322920 EBS65327402 EBS65326747 EBS13011117 EBS65323257 EBS65327403 EBS65327404 EBS65327405 EBS65327406 EBS65323826 EBS65321066 EBS65327407 EBS65320934 EBS65327306 EBS65327409 EBS65327410 EBS65327412 EBS65327413 EBS65327414 EBS65320975 EBS65321089 EBS65327415 M1BS27/46 M1BS27/31 EBS65320513 EBS65325684 EBS 65327489
14 DECLARATION OF CONFORMITY
EC DECLARATION OF CONFORMITY
In accordance with BS EN ISO/IEC 17050-1:2004
We:
Grant Engineering (UK) Limited
Of:
Telephone: Fax: Email: Website:
Frankland Road Blagrove Industrial Estate Swindon SN5 8YG +44 (0)1380 736920 +44 (0)1380 736991 info@grantuk.com www.grantuk.com
Declare that: Equipment: Model Name/Number:
Domestic oil boilers Grant Vortex Eco Wall Hung External 16-21 Grant Vortex Eco Wall Hung External System 16-21
Note: All Grant system variants are supplied with glandless high efficiency integrated circulators
In accordance with the following Directives:
2006/95/EEC
Conforms with the safety objectives of the Low Voltage Directive and its amending directives.
2004/108/EC
Conforms with the essential protection requirements of the Electromagnetic Compatibility Directive and its amending directives.
92/42/EC
Conforms with the requirements of the Boiler Efficiency Directive.
2010/30/EU
Conforms with the Labeling of Energy related products to EU (no) 811/2013
2009/125/EC
Conforms with the Ecodesign of Energy related products to EU (no) 813/2013
I hereby declare that the equipment named above has been tested and found to comply with the relevant sections of the above referenced specifications. The unit complies with all essential requirements of the Directives.
Responsible Person: Position: Signature:
Neil Sawers Technical Manager
Date:
April 2022
Page 48
Section 14: Declaration of Conformity
15 HEALTH AND SAFETY INFORMATION
Under the Consumer Protection Act 1987 and Section 6 of the Health & Safety at
Work Act 1974, we are required to provide information on substances hazardous
to health (COSHH Regulations 1988). Adhesives, sealants and paints used in the
manufacture of the product are cured and present no known hazards when used in
the manner for which they are intended.
The following other materials are present in the product:
15.1 INSULATION MATERIALS
Material Types: Ceramic fibre board, mineral wool. Description: Rigid board,
slabs, sleeves, gaskets, ropes.
Known Hazards: May cause temporary irritation or rash to skin. High dust
levels may irritate eyes and upper respiratory system.
Precautions: Avoid unnecessary or rough handling, or harsh abrasion of boards.
Normal handling and use of material should not produce high dust levels.
Avoid inhalation, and contact with skin and eyes.
After handling always follow normal good hygiene practices.
Protection: Use disposable gloves, face mask and eye protection.
First Aid: Eyes – If irritation occurs, wash eyes with copious amounts of
water.
If symptoms persist, seek immediate medical advice.
Skin If irritation occurs, wash under running water before washing with soap
and water.
Inhalation Remove to fresh air, drink water to clear throat and blow nose to
remove dust/fibres. Ingestion Drink plenty of water.
15.3 KEROSENE AND GAS OIL FUELS (MINERAL OILS)
Known Hazards: The effect of mineral oils on the skin vary according to the
duration of exposure and the type of oil.
The lighter fractions remove the protective grease naturally present on the
skin, leaving it dry, liable to crack and more prone to damage by cuts,
abrasions and irritant chemicals.
Skin rashes (Oil acne) most often on arms, but also on any part of the body in
contact with oil or oily clothing.
Contact with fuel oils can cause dermatitis. Precautions: Avoid as far as
possible any skin contact with mineral oil or with clothing contaminated with
mineral oil.
The use of a lanolin-based barrier cream is recommended, in conjunction with
regular washing with soap and rinsing with water to ensure all oil is removed
from the skin.
Take care to prevent clothing, especially underwear, from becoming
contaminated with oil.
Do not put oily rags or tools in pockets, especially trouser pockets. Have
first-aid treatment at once for an injury, however slight. Do not inhale any
vapours from mineral oils.
15.2 SEALANT AND ADHESIVE
Material Types: Silicone elastomer.
Description: Sealant and adhesive.
Known Hazards: Irritation to eyes.
Precautions: Avoid inhalation of vapour, contact with eyes and prolonged or
repeated contact with skin.
After handling always follow normal good hygiene practices.
Protection: Use eye protection. Rubber or plastic gloves should be worn where
repeated contact occurs and a face mask worn when working in confined spaces.
First Aid: Eyes Flush eyes with water for 15 minutes. Seek immediate medical
attention.
Skin Wipe off and wash with soap and water. Inhalation Remove to fresh air.
Section 15: Health and Safety Information
Page 49
16 END OF LIFE INFORMATION
GENERAL
Grant oil boilers incorporate components manufactured from a variety of
different materials. The majority of these materials can be recycled whilst
the smaller remainder cannot.
Materials that cannot be recycled must be disposed of according to local
regulations using appropriate waste collection and/or disposal services.
DISASSEMBLY
There is little risk to those involved in the disassembly of this product.
Please refer to and follow the Health and Safety Information given in the
Installation & Servicing Instructions provided with the boiler. For guidance
on the disassembly of the boiler refer to the information given in the
Servicing section of the Installation & Servicing Instructions provided with
the boiler.
RECYCLING
Many of the materials used in Grant oil boilers can be recycled, these are listed in the table below:
COMPONENT
MATERIAL
Outer casing panels
Mild steel (polyester powder coated)
Primary heat exchanger and baffles
Mild steel
Secondary heat exchanger
Stainless steel
Secondary heat exchanger spirals
Aluminium alloy
Pipework
Copper
Burner body/flange
Aluminium alloy
Burner oil pump
Aluminium alloy/steel
Riello oil burner cover
Plastic
Electrical wiring
Copper/plastic
Thermostats
Copper/plastic
Printed Circuit boards
Copper/plastic
DISPOSAL
All materials other than those listed above must be disposed of responsibly as
general waste.
Neil Sawers Technical Manager
Page 50
Section 16: End of Life Information
17 PRODUCT FICHE
Product fiche concerning the COMMISSION DELEGATED REGULATIONS (EU) No 811/2013
of 18 February 2013 (EU) No 813/2013 of 2 August 2013
Vortex Eco Wall Hung External
Symbols
Unit
Condensing boiler Low temperature boiler B1 boiler Combination heater Rated heat output Useful heat output At rated heat output and high temperature regime At 30% of rated heat output and low temperature regime Auxiliary electricity consumption At full load At part load In standby mode Useful efficiency Seasonal space heating energy efficiency At rated heat output and high temperature regime At 30% of rated heat output and low temperature regime Other items Standby heat loss Ignition burner power consumption Annual energy consumption Sound power level indoors Emissions of nitrogen oxides Emission class Daily fuel consumption Annual fuel consumption
Prated
P4 P1
elmax elmin PSB
s 4 1
Pstby Pign QHE LWA NOX
Qfuel AFC
kW
kW kW
kW kW kW
% % %
kW kW kWh dB mg/ kWh
kWh GJ
Yes No No No 21
21
6.3
0.150 0.07
0
90.52 90.8
96.9
0.236 0 52
<120 2 –
16-21 System 16-21
Yes No No No 21
21
6.3
0.150 0.07
0
90.52 90.8
96.9
0.236 0 52
<120 2 –
Section 17: Product Fiche
Page 51
18 GUARANTEE
You are now the proud owner of a Grant Vortex condensing boiler from Grant
Engineering (UK) Limited which has been designed to give years of reliable,
trouble free operation.
Grant Engineering (UK) Limited guarantees the manufacture of the boiler
including all electrical and mechanical components for a period of twelve
months from the date of installation4, provided that the boiler has been
installed in full accordance with the installation and servicing instructions
issued.
This will be extended to a total period of two years if the boiler is
registered with Grant Engineering (UK) Limited within thirty days of
installation and it is serviced at twelve month intervals3. See main Terms and
Conditions below.
Registering the product with Grant Engineering (UK) Limited Please register
your Grant Vortex condensing bo
References
- Award Winning HVO compatible boilers, air source heat pumps & renewable heating from Grant UK
- Register Your Product For Its Grant Guarantee - Warranty Registration Grant UK
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