SUH-S Gas Fired Warm Air Heater

Gas Fired Warm Air Heater – Model SUH-S+

Specifications

• Performance: Efficient heating
• Gas types: Natural gas, Propane (G31)
• Dimensions: Compact design

Product Usage Instructions

Installation

Before installation, ensure to follow safety instructions for
protection against dust, temperature, corrosive vapors, and water.
Proper positioning, gas type and connection, electrical connection,
and room thermostat installation are essential.

Flue Systems

Proper installation of flue terminals, consideration of flue
length, and prevention of condensation are crucial for the
efficient operation of the air heater.

Operating the Air Heater

Understand the burner cycle, minimum firing time, Delta-T
regulation, summer ventilation, overheat protection, and regular
checks on the flue passage for safe and effective operation.

Commissioning

Adjust settings and commission the air heater properly before
use. Follow guidelines for first-time use with the thermostat.

Combustion Settings

Learn how to adjust burner settings and convert to another gas
type if necessary.

Maintenance

Regular maintenance is essential for optimal performance. Follow
instructions for basic maintenance, burner unit maintenance, and
maintenance in dusty environments.

FAQ

Q: What should I do if I encounter explosive ignition or

frequent flame failures?

A: Check for proper gas supply and follow troubleshooting steps
for explosive ignition or flame failures mentioned in the
manual.

Q: How often should I perform basic maintenance on the air

heater?

A: Basic maintenance should be performed regularly as per the
maintenance schedule provided in the manual, typically every few
months depending on usage.

®
INSTALLATION MANUAL
Gas Fired Warm Air Heater
Model SUH-S+

Content

1. Introduction

3

1.1 Symbols used in this manual

3

1.2 Warranty

3

2. Safety Instructions

3

2.1 Installation

3

2.1.1 Protection against dust

3

2.1.2 Temperature

3

2.1.3 Corrosive vapours

3

2.1.4 Protection against water

3

2.2 Use

3

2.3 Maintenance and cleaning

3

2.3.1 Protection from water (IP class)

3

2.4 Children and vulnerable users

3

3. Technical Specifications

4

3.1 Performance

4

3.2 Gas types

4

3.2.1 Natural gas

4

3.2.2 Propane (G31)

5

3.3 Dimensions

5

4. Installation

6

4.1 Preparation

6

4.1.1 Standards

6

4.2 Positioning the air heater

6

4.2.1 Orientation

6

4.2.2 Suspension

6

4.3 Gas type and connection

8

4.4 Electrical connection

8

4.4.1 Power supply

8

4.4.2 Fuse

8

4.5 Roon thermostat

8

4.5.1 Installation requirements

8

4.5.2 Modulating room thermostat

9

installation

4.5.3 Installation of multiple heaters on

9

one control unit

5. Flue systems

10

5.1 Flue terminals

10

5.1.1 Flue material

10

5.2 Flue length (max)

11

5.3 Condensation in the flue system

11

5.3.1 Air heater type

11

5.3.2 Air heater location

11

5.3.3 Flue pipe length

11

5.4 Installation of the flue terminal

12

5.4.1 Installation – roof terminal

12

5.4.1.1 Preparation

12

2

5.4.1.2 Installation

12

5.4.2 Installation – wall terminal

13

5.4.2.1 Preparation

13

5.4.2.2 Installation

13

5.4.3 Installation of the flue system parts 13

5.4.3.1 Requirements

13

5.4.3.2 Elements system ALU FIX thick wall 13

5.4.3.3 Seals

13

5.4.3.4 Installation

14

6. Operating the air heater

14

6.1 Burner cycle

14

6.2 Minimum firing time

14

6.3 Delta-T regulation

15

6.3.1 Switch off Delta-T

15

6.4 Summer ventilation

15

6.5 Overheat protection

15

6.5.1 Heat exchanger

15

6.5.2 Flue system

15

6.6 Flue passage check

15

7. Commissioning the air heater

16

7.1 Adjusting the settings

16

7.2 Commissioning the air heater

16

7.2.1 First use – Thermostat

16

8. Combustion settings

17

8.1 Adjusting the burner settings

17

8.2 Converting to another gas

17

9. Troubleshooting

17

9.1 Volatile lock outs

18

9.2 Temporary errors

18

9.3 Warnings

18

9.4 Instructions

19

9.5 Further troubleshooting

20

9.5.1 Explosive ignition and/or frequent 20 flame failures

9.5.2 Insufficient output

20

9.5.3 Non modulating system fan

20

10. Maintenance

20

10.1 Preparation

20

10.2 Basic maintenance

20

10.3 Maintenance of the burner unit

21

10.4 Maintenance in dusty environments 21

11. Electrical wiring diagrams

22

12 Exploded view and spare parts

26

13 Declaration of conformity

27

14 Disposal and recycling

27

1. Introduction
This manual is intended for the gas, electrical and mechanical installer.
This document gives instructions on how to use and maintain the air heater. It is most important to follow the instructions in this document for safe operation of this air heater.
It is important to read this document before starting the installation process. Store this document close to the air heater for quick reference.
1.1. Symbols used in this manual DDAANNGGEERR!! Indicates a dangerous situation that would lead to death or severe injury.
WARNING! Indicates a potentially dangerous situation that could lead to death, severe injury or serious product damage.
CAUTION! Indicates a potentially dangerous situation that could lead to injury or product damage.
NOTICE Indicates important information that is not directly related to safety.
1.2. Warranty NOTICE Using, installing or maintaining this air heater in any other way than described in this manual may cause damage that voids the warranty.
NOTICE Failing to follow the safety instructions in this manual can lead to damage to the air heater or the installation and void the warranty

cause the internal components to degrade much faster.
NOTICE Air heaters installed in very cold environments may form condensate in the flue system. Make sure a condensate discharge is installed.
2.1.3. Corrosive vapours WARNING! Do not install the air heater in areas that contain any corrosive or explosive vapours. Corrosive vapours (e.g. containing Chlorine) that are sucked into the air intake will cause corrosion of the heat exchanger and a leakage of condensate and flue gas. This is also the case for the room thermostat.
2.1.4. Protection against water WARNING! Never use water when cleaning electrical parts. This air heater is not waterproof and has an IP00B classification.
WARNING! Do not expose the air heater to rain, spray or dripping water.
2.2. Use CAUTION! Make sure the area around the air heater is dry when performing maintenance on the air heater.
CCAAUUTTIIOONN!! Always close the doors and inspection hatches of the air heater, except when adjusting and checking the appliance.
2.3. Maintenance & Cleaning Frequent maintenance and cleaning of the air heater is necessary to ensure safe and proper operation. Failure to do so could lead to damage to the heater or its surroundings and void the warranty.

2. Safety instructions
Always follow the safety instructions in this chapter
when installing, using or performing maintenance on this
air heater:

2.3.1. Protection from water (IP class) WARNING! Never use water when cleaning electrical parts. This air heater is not waterproof and has an IP20B classification.

2.1. Installation CAUTION! This air heater must be installed and maintained by an authorized, qualified and competent installer, using calibrated equipment.
NOTICE This air heater must be installed and maintained in accordance with this manual, national and local building regulations and local health and safety regulations.
2.1.1. Protection against dust CAUTION! Do not use the air heater in a very dusty environment. Dust may accumulate and cause a defect of the heater. This is also the case for the room thermostat.
2.1.2. Temperature CAUTION! Do not install the heater in places where the temperature can rise above 35°C. Higher temperatures

WARNING! Do not expose the air heater to rain, spray or dripping water.
2.4. Children and vulnerable users WARNING! This air heater can be used by children aged 8 years and above and by persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge, if they are supervised or instructed concerning use of the appliance in a safe way and understand the hazards involved.
WARNING! Children shall not play with the air heater.
WARNING! Children shall not clean and maintain this air heater without supervision.
3

3. Technical Specifications
3.1 Performance

Model

Technical Specification – SUH-S+ Series

Unit

SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S 10+ 20+ 30+ 40+ 50+ 60+ 80+ 100+ 120+

Net Heat Input

Max kW Min kW

Heat Output

Max kW Min kW

Efficiency (net)

Max output % Min output %

Air volume (maximum)

m3/h

Throw (maximum)

Horizontal m Vertical m

Gas consumption maximum

Nat gas (G20) LPG (G31)

m3/h kg/h

Gas connection size

BSP

Electrical supply

V

NOx Emission (GCV)

mg/kWh

NOx Class

–

Flue connection size Ø

mm

Horizontal unit m Maximum straight flue run
Vertical unit m

Flue gas volume (maximum)

kg/h

Flue system pressure (maximum)

pa

Power consumption (maximum)

W

Power consumption (maximum) EC version

W

Electrical current (maximum)

A

Electrical current (maximum) EC Version

A

Protection class

Noise level (5m from front)

High dB(A) Low dB(A)

Mounting height (minimum)

Horizontal m Vertical m

Weight

kg

3.2 Gas types 3.2.1 Natural gas

14.0 8.5 12.5 8.0 90.4 93.8 2,750 22 5 1.5 1.1 ½”
48 5 80
21.7 90 200 160 0.9 1.3
56.5 54.0 2.7 4.0 46

22.8 13.5 20.7 12.8 90.6 94.6 4,000 30
7 2.4 1.8 ½”
4.8 5 80 6.0 2.0 35.5 90 300 175 1.4 1.6
58.0 56.5 2.7 4.0 50

32.0 18.0 28.9 17.0 90.4 94.6 4,200 31
7 3.4 2.5 ½”
45 5 80
51.3 90 300 175 1.4 1.6
59.0 56.0 2.7 4.0 53

44.0 55.0 66.0

26.4 33.0 39.6

41.1 50.7 61.2

25.3 31.5 37.9

93.5 92.2 92.7

95.8 95.6 95.6

5,400 8,000 8,000

32

46

30

8

11

8

4.7 5.8 7.0

3.5 4.4 5.3

¾”

¾”

¾”

230V N & E 50Hz

39

49

45

5

5

5

80

80

80

8.0

2.0

70.6 88.2 105.8

120 120 120

325 750 750

260 475 475

1.5 3.5 3.5

1.2 2.3 2.3

IP20B

59.0 64.0 64.0

54.5 58.0 58.0

2.7 2.7 2.7

5.0 6.0 6.0

78

86

82

72.0 91.0 111.0

48.0 60.0 72.0

68.6 86.9 105.6

46.0 57.6 69.4

95.3 95.5 95.1

95.9 96.0 96.4

10,200 10,700 13,000

38

40

43

–

–

–

7.6 9.6 11.7

5.8 7.3 8.9

1″

1″

1″

51 5 100
115.4 150 730 770 3.3 3.5

43 5 100 9.0 145.9 150 760 630 3.5 4.8

60 5 130
177.9 150 1,210 1,080 5.5 4.9

62.0 62.0 62.0

58.0 58.0 58.0

2.7 2.7 2.7

–

–

–

185 195 215

Specification
Nominal supply pressure Supply pressure (min – max) Gas category Class

Unit
mbar mbar
–

Natural Gas G20
20 17-25 12H B23, C13, C33

Specification

CO 2

High

CO 2

Low

CO 2

Low

service

mode

O 2

High

O 2

Low

O 2

Low

service

mode

4

Unit

SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S 10+ 20+ 30+ 40+ 50+ 60+ 80+ 100+ 120+

%

9.1 9.0 9.0 9.0 9.0 9.0 9.1 9.1 9.1

%

8.5 8.5 8.5 8.5 8.6 8.6 9.0 8.9 9.1

%

8.5 8.5 8.5 8.5 8.6 8.6 8.5 8.5 8.5

%

4.7 4.8 4.8 4.8 4.8 4.8 4.7 4.7 4.7

%

5.8 5.8 5.8 5.8 5.6 5.6 4.9 5.0 4.7

%

5.8 5.8 5.8 5.8 5.6 5.6 5.8 5.8 5.8

3.2.2 Propane G31
Specification
Nominal supply pressure Supply pressure (min – max) Gas category Class

Specification

CO 2

High

CO 2

Low

CO 2

Low

service

mode

O 2

High

O 2

Low

O 2

Low

service

mode

3.3 Dimensions

Unit
mbar mbar
–
Unit
% % % % % %

Propane G31
30-50 25-50 13P B23, C13, C33 SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S SUH-S
10+ 20+ 30+ 40+ 50+ 60+ 80+ 100+ 120+ 11.0 10.8 10.8 10.8 10.8 10.6 11.0 11.0 11.1 10.5 10.5 10.5 10.5 10.3 10.3 10.8 10.7 11.0 10.5 10.5 10.5 10.5 10.3 10.3 10.5 10.5 10.5 4.2 4.5 4.5 4.5 4.5 5.0 4.2 4.2 4.1 4.9 4.9 4.9 4.9 5.2 5.2 4.5 4.7 4.2 4.9 4.9 4.9 4.9 5.2 5.2 4.9 4.9 4.9

Fig 1. SUH-S+10 to 30

Fig 2. SUH-S+40 to 60

Fig 3. SUH-S+80 to 100 5

Fig 4. SUH-S120+
4. Installation
4.1 Preparation Before installation, please use the data badge to check:
· if the heater is in accordance with the order · if the heater is suitable for the local present
provisions (gas type, gas pressure, electrical supply etc.)
Before leaving the factory, the air heater has been tested for safety and has been set to the operating settings. It has been configured for the type of gas that is stated on the data badge. Should there be any doubt about the settings that apply to your situation, please contact your supplier.

· Make sure the air flow to and from the heater is free from obstacles at least 5 metres in front of the
heater. Also make sure the air intake is free from
obstacles.
· Make sure enough space remains to open the door of the air heater.
· Make sure the wall can support the air heater. · Ensure sufficient clearance distance for the flue
system.

4.1.1. Standards
NOTICE The installation must comply with all applicable local and national standards.

NOTICE The air heater must be installed in accordance
with the relevant requirements of the Gas Safety regulations, Electrical installation regulations and or other local regulations that may apply.

For United Kingdom only: NOTICE The air heater must be installed in accordance with the relevant requirements of the Gas Safety regulations, Electrical installation regulations and or other local regulations that may apply (e.g. The Institute of Gas Engineers IGE UP-1 and 2, BS6230, BS5440 building regulations and the IIE regulations that incorporate the gas safety regulations).
4.2. Positioning the air heater Keep the following requirements in mind when choosing a location to install your air heater:
WARNING! Never install an air heater close to flammable materials.
· Keep sufficient distance between the heater and any obstructions. This is both for safety reasons and to allow access for service and maintenance (Fig 5.).
6

Fig 5. Minimum clearances around the air heater
4.2.1. Orientation · When the heater is not installed horizontally, readjust the CO2 setting from the gas valve. · If the air heater is installed with the air stream vertically downwards, maintain a maximum suspension height of 8m to ensure that warm air will reach the floor.
4.2.2. Suspension Depending on the model of heater, four types of wall support can be used:

Model SUH-S10+ to 30+ SUH-S40+ to 60+ SUH-S80+ to 120+ SUH-S10+ to 30+

Wall Bracket Standard Standard Standard Pivoting

Part Number GA8610 GA8620 GA8622 GA8630

Fig 6. Standard wall mounting bracket

Dimension A (mm) B (mm) C (mm) D (mm)

SUH-S10+ to 30+ 550 640 830 540

SUH-S40+ to 60+ 665 815 990 720

Fig 8. Vertical suspension kit

Model

Decription

SUH-S10+ to 60+ Vertical suspension kit

Part Number GA8645

Dimension A (mm)

SUH-S10+ to 30+ 540

SUH-S40+ to 60+ 720

Fig 7. Pivoting wall mounting bracket

Fig 9. Large wall mounting bracket (GA8622) 7

4.3. Gas type & connection The unit is suited for the use of natural gas or propane gas.
The specific gas type that a heater is set up for can be found on the packaging labels and on the heater badge. The heater can be converted to another gas type. Contact your supplier for more information.

WWAARRNNIINNGG!! Never use a room thermostat to interrupt the electric power supply to the heater.
4.4.2. Fuse One fuse is present on the air heater’s control board (see the electrical wiring diagram in sect11.).
· When replacing this fuse, always use one of the same type (5AT).

The working and standing supply pressure must be a minimum of 17 mbar, and a maximum of 50 mbar, measured at the inlet pressure nipple of the gas control in the heater.
NOTICE The supply line’s manual isolation valve must be placed within reach of the heater.
NOTICE All gas supply lines must be mounted without any mechanical tension.
NOTICE Always clean the inside of a gas supply line before connecting it to the air heater. Place a gas filter in the supply line when needed.
CAUTION! When using pressures above 60 mbar to test the supply lines, always close the manual isolation valve of the air heater.
For United Kingdom only: The supply line for gas must comply with the Gas Engineers publications UP-1 and UP-2, as well as with BS6891.
4.4. Electrical connection The electrical installation must comply with local and national requirements as well as IEE regulations.
4.4.1. Power supply The air heater requires an earthed power supply of 230V/AC. The control circuit is a two wire low voltage bus communication.

4.5. Room thermostat The heater can only be controlled with one of the following modulating room thermostats:
· The MTS: a modulating digital thermostat. · The MTC: a modulating digital clock thermostat
with optimiser. · Interface module; a specially designed interface
module for BMS systems. Contact your supplier for more information.
WARNING! Never use a room thermostat to interrupt the electric power supply to the heater.
NOTICE This air heater must not be controlled with a simple ON/OFF thermostat due to ERP requirements.
4.5.1. Installation requirements Following these requirements when placing the thermostat to ensure the heater functions correctly:
· Make sure that air can circulate around the thermostat.
· Make sure the sun does not shine directly upon the thermostat.
· Do not place the thermostat on a cold wall. · Place the thermostat on an inner wall free from
draught. · Never place the thermostat within the throw of
the heater. · Never mount the thermostat near the aerials of
internal communication networks. These emit radiation that can disturb the thermostat. Keep several meters distance.

230V 1Phase 50Hz

L

N

In all cases, the communication between the heater and the thermostat is based on a two wire, low-voltage connection. (see the electrical wiring diagram in sect11.). Follow these instructions to prevent malfunction of the installation and damage to the thermostat or air heater:

L PE N
Fig 10. Heater power connections
· Connect the wires of the mains cable to the clamps in the connection box (Fig. 10).
· The heater must be electrically isolated during servicing. Use an isolation switch (min. 3mm contact opening gap), a power plug or a nonswitched fuse spur. See the electrical wiring diagram in sect 11.

Use a cable with the following specifications: ­ Signal cable. ­ Shielded and twisted. ­ Minimum dimensions: 1 x 2 x Ø0,8 mm2. ­ Maximum length: 200 m.
CAUTION! Keep the thermostat cable separated from the mains cables.
CAUTION! Connect the cable’s earth shield only to the

8

earth terminal inside the air heater. Do not connect the other end of the cable’s earth shield.

can control up to 8 air heaters. To connect the air heaters, do the following (Fig. 14):

NOTICE A cable with a thickness of less than 0.8 mm will result in a poor signal.
NOTICE A cable that is not shielded and twisted may result in a disturbed communication in an EMC-unfriendly environment.
4.5.2. Modulating room thermostat installation To connect the air heater to an MTS or MTC thermostat, do the following:

1. Connect the two wires of the thermostat to terminals 4 and 5 of the first air heater.
2. Connect the first air heater to the second air heater.
3. Repeat for each subsequent air heater.

1

NL PE N L

1
45 NL

2

NL PE N L

2
45 NL

3

NL PE N L

3
45 NL

…8

NL

…8

PE N L

45 NL

1. 1. Connect the two control wires to terminals 4 and 5 (see figure 11 or the electrical wiring diagram in sect11.).
2. Set the S1 and J14 switches on the control unit as follows (figure 12 / 13): a. Set S1 to 1. b. Set J14 to 1.
NOTICE The air heater must be switched off when setting the switches. Otherwise the settings will have no effect.

PE N L 4 5

PE N L 4 5

PE N L 4 5

PE N L 4 5

22°C 22°C

45

45

45

S1

J14

10

ON
1S21 3 4 5 6 7 8J14

1

10

ON
2 1ON 0 12345678 12345678

1

45
22°C

45

45

10

ON
3 1ON 0 12345678 12345678

2

ON

22°C

10

12345678

3

Fig 14. Connection of multiple air heaters to a

modulating room thermostat

Fig 11. Modulating thermostat connection

SS11
11 00

JJ1144
OONN

11 22 33 4455 66 77 88
Fig 12. Position of S1 & J14 switches

Each air heater needs an unique number to be recognised by the room thermostat. This number can be set
with the J14 switch on the control unit of each air heater:

1. Set the S1 and J14 switches on the control unit as follows (figure 15): a. Set the S1 switch of the first air heater to 1. b. Set the S1 switch of the other air heaters to 0. c. Set the J14 switch of the first air heater to 1. d. Set the J14 switch of the second air heater to 2, etc.

S1
10

J14
ON
12345678

10

ON
12345678

Fig 13. Location of S1 & J14 switches
4.5.3 Installation of multiple heaters on one control unit An MTC or MTS room thermostat, or interface module

ON
10
12345678
Fig 15. Position of S1 and J14 switches for the first three air heaters in a system

9

NOTICE If the J14 switch of more than one air heater is set to the same number, the system will not work.

NOTICE The air heater must be switched off when setting

the switches. Otherwise the settings will have no effect.

S1

J14

5. Flue systems ON
To ensure1safe0and proper use, this air heater must be connected to a flue s1ys2te3m4. T5hi6s f7lu8e system must be
installed according to this manual as well as national and local regulations. A flOuNe system consists of a flue terminal, piping1and0an optional condensate discharge system.
12345678

CAUTION! Do not use flue terminals for condensing
appliances on non-coOnNdensing heaters. This can lead to water insid1e th0e flue system.

12345678

NOTICE Only use the prescribed flue material for the roof terminal, wall terminal and for the piping between the heater and the terminal. This is the only way the installation will be approved.

Dimension
A (mm) B (mm) d (Ømm) D (Ømm) HOH (mm)

SUH-S10+ to 30+ 1200 400 80 125 110

SUH-S40+ to 60+ 1200 400 80 125 110

SUH-S90+ to 100+
1200 500 100 150 140

SUH-S 120+ 1850 955 130 200 225

Model
SUH-S1+ to 60+ SUH-S80+ to 100+ SUH-S120+ SUH-S10+ to 30+

Horizontal Discharge

Flue Terminal

Part Number

Concentric 80/125

IA8113

Concentric 100/150

IA8112

Concentric 130/200

IA8312

2 Pipe Terminal

GA8201

NOTICE Local regulations can require the flue terminal to be placed at least 0.6 m above roof level.

NOTICE Local regulations can require a minimum distance between the flue terminal and air ventilation openings on the building.

5.1. Flue terminals
The following flue terminals are compatible with this air heater

Model

Vertical Discharge

Flue Terminal

Part Number

SUH-S10+ to 60+ SUH-S80+ to 100+ SUH-S120+

Concentric 80/125 Concentric 100/150 Concentric 130/200

IA8202* IA8101 IA8305

• For h > 0.5m above the roof, use part number. IA8218

Fig 17. Horizontal concentric flue terminal

Fig 16. Vertical concentric flue terminal 10

5.1.1. Flue material Only use CE marked flue material from the manufacturers Muelink & Grol (M&G) and Burgerhout.
Use type Alu-fix with a minimum temperature class of T250 P1.
Use flue pipes with the same diameter as the flue spigots on the heater.
Contact your supplier to purchase these flue materials.
NOTICE Different manufacturers use different connections systems for flue pipes. Do not combine

systems from different manufacturers.

5.2. Flue length (max.) The maximum straight length L (m) between the air heater and its flue terminal for both orientations is:

Heater Orientation Flue Outlet Figure
SUH-S10+ to 30+ SUH-S40+ to 60+ SUH-S80+ to 120+

Horizontal Wall Fig 18. 6 8 9

Horizontal Roof Fig 19. 6 8 9

Vertical Roof Fig 20. 2 2 –

Bends that are used in the connection between an air heater and the flue terminal cause a decrease in pressure:

· Using a 90° bend decreases the maximum length of the connection by 2 meters.
· Using a 45° bend decreases the maximum length of the connection by 1 meter.
For further information regarding the flue system, please contact your supplier.
L

Fig 20. Flue length: vertical heater orientation, vertical flue
5.3. Condensate in the flue system Condensate can form in the flue system when the air heater is heating up. This condensate will evaporate if the heater is operating for a longer period of time. The forming of condensate depends on the following factors:

Fig 18. Flue length: Horizontal heater orientation, horizontal flue

5.3.1. Air heater type Condensate is especially likely to form in the smaller heaters (< 25 kW).
Condensate will most likely not form in the larger heaters (> 25 kW).

5.3.2. Air heater location When an air heater burns frequently and is placed in
a normally heated room (temperature above 15 °C), condensate is unlikely to form.

Air heaters placed in a room that needs to be just above
5OC will only burn for short periods at the time. Formed condensate will not evaporate in these short burning periods. The condensate will accumulate and eventually result in pressure switch errors. To prevent this:

· Add a T-piece (Fig 21.) or
· Add a condensate drain (Fig 22.)

Fig19. Flue length: horizontal heater orientation, vertical flue

5.3.3. Flue pipe length When the flue pipe is long and runs through a cold space, condensate can form. If the straight length of the flue pipe is longer than 4 meters, the condensate will not evaporate and accumulate in the heater.
11

In this case. To prevent this: · Insulate the flue pipes. or · Place a condensate trap (Fig. 21)
Fig 21. Tee piece (6) and condensate trap (7)

5.4. Installation of the flue terminal There are flue terminals available for installation through a roof or through a wall.

NOTICE The flue terminal must be installed according to local and national regulations.

NOTICE Do not combine components or materials from different manufacturers.

5.4.1. Installation – Roof terminal To install the flue terminal in the roof, do the following:

5.4.1.1. Preparation 1. Check all components for possible damage. 2. Determine the roofing type:

Flat Roof Flashing

Synthetic Tile

Universal Pitched Roof flashinG

Ø80 to 130mm

Ø130 to 210mm

–

IA8121

GA8334

–

3. Determine where the flue terminal will be positioned.

5.4.1.2. Installation 1. Create a hole from the outside of the roof.

CAUTION! Make sure no debris or dust gets into the air heater.

2. Install the weather collar. 3. Carefully insert the flue terminal from the outside.

Ø32

Fig 22. Condensate drain 12

CAUTION! Do not rotate the cap.

4. Put the flue terminal into a vertical position. Use a level.
5. OPTIONAL – If desired, fit cover plates. These are supplied separately.
6. Place the supplied wall clamp around the flue terminal and fit it to the roof construction. Do not tighten the clamp yet.
7. Connect the gasket and the twin-tube connection. Make sure that the gasket is not damaged.

9. Connect the gasket and the twin-tube connection.
NNOOTTIICCEE Make sure the flue tube and the air inlet tube are not mixed up. The flue tube should be in the centre of the flue terminal.
10. Check if all steps have been carried out correctly.
5.4.3. Installation of the flue system parts This chapter gives the instructions for installing an ALU FIX flue system.

5.4.3.1. Requirements The installation must follow these requirements:
· Minimum distance between the flue system and combustible materials of 40 mm.
· Minimum depth of female sockets of 40 mm.
· Minimum slope of horizontal piping of 50 mm/m (3°). This allows condensate to flow to the heater.

NOTICE Make sure the flue tube and the air inlet tube are not mixed up. The flue tube should be in the centre of the flue terminal.
8. Tighten the roof wall clamp. 9. Check if all steps have been carried out correctly.

NOTICE Use brackets that match the flue system. Different manufacturers use different connection systems for flue pipes. It is not allowed to combine systems from different manufacturers.
5.4.3.2. Elements system ALU FIX thick wall An ALU FIX flue system is created with four elements (figure 23).

5.4.2. Installation – Wall terminal To install the flue terminal in a wall, do the following:

5.4.2.1. Preparation 1. Check all components for possible damage. 2. Determine where the flue terminal will be positioned.

5.4.2.2. Installation 1. Create a hole through the wall.
CAUTION! Make sure no debris or dust gets into the air heater.
2. Carefully insert the flue terminal from the outside.
CAUTION! Do not rotate the cap.
3. Put the flue terminal in a horizontal position. Use a level.
4. Mark the holes on the wall. 5. Drill the holes. 6. Insert screws to fix the terminal in place. 7. Seal the edges of the flue terminal with kit. 8. Fix the shield on the inside of the wall.
CAUTION! Make sure that the gasket is not damaged.

Fig 23. Components of a flue system
5.4.3.3. Seals The connection between the different flue elements must be made airtight and waterproof with silicon seals.
CAUTION! If the flue elements have been cut, make sure to clean and chamfer the edges. Sharp edges will damage the seals.
CAUTION! Do not drill or screw in the flue elements.
CAUTION! Do not try to seal the connections with kit, foam or tape.
CCAAUUTTIIOONN!! Do not use grease, vaseline or oil to lubricate the installation.
CAUTION! Only use the lubricant allowed by the
13

manufacturer to lubricate the connections. A maximum soap concentration of 1% is allowed.
NOTICE Follow the instructions from the manufacturer if the connections need to be fixed.

6. Operating the air heater
6.1. Burner cycle
The air heater’s display shows the current status of the burner cycle (Fig 24.)

5.4.3.4. Installation Take note of the following rules and requirements when installing a flue system:

CAUTION! Do not apply mechanical force on the parts during installation.

Requirements for horizontal and non-vertical piping: · Maximum distance between brackets of 1 m. · On tensile joints; maximum distance between brackets of 2 m.

Fig 24. Air heater display

Follow the manufacturer’s instructions. · Spread the brackets evenly along the piping.

Requirements for vertical piping: · Maximum distance between brackets of 2 m. · Spread the brackets evenly along the piping.

Always place a bracket on or near a bend or elbow piece, except if the flue pipes before and after the elbow piece are shorter than 0.25 m. In this case, fix the second element after the elbow with a bracket.

Every flue discharge system needs to be secured with at least one bracket. The first bracket needs to be within the first 0.5 m of the air heater.

When installing a flue system inside a shaft, do the following:

1. Check the components for possible damage or blockage.
2. Check that the pipe is at the right slope (see Requirements).
3. Mark the flue pipes and fresh air pipes to avoid mixing them up.
4. Make sure that the pipes extend for at least 50mm
when passing through a wall or other obstacle. 5. Fix the last element before entering the shaft in
place. If the last element is an elbow piece, the next element must also be fixed in place. 6. Check if ventilation openings and inspection hatches comply with national and local regulations.

6.2. Minimum firing time The heater will always fire for a minimum of 4 minutes, even if the heat demand stops. This is to avoid a large amount of start and stops and to prevent condensate
from accumulating in the flue system.

NOTICE The heater will try to ignite 2 times before it stops and gives an error.

14

6.3. Delta-T-regulation The air heater can function as a de-stratification fan. This is called delta-T regulation and it is done via the room thermostat, with a temperate measurement sensor that is located on the air heater.
The system fan is activated when the temperature difference between the sensor on the heater (the delta-T NTC sensor) and the sensor in the thermostat is greater than 12OC (standard factory setting). This procedure ensures an even distribution of temperature throughout the building, thus acting as a fully automatic destratification fan.
6.3.1. Switch off delta-T-regulation Delta-T regulation can be switched off when it is not desired (e.g. when it causes discomfort). This can be done in the Settings menu on the room thermostat. See the user manual of the special Room thermostat for more information.

If the flue system becomes too hot, this sensor will cause the heating process to stop. Depending on the temperature, the heater performs the following actions:
· Step 1: Power reduction (when possible). · Step 2: Burner stop, followed by an automatic
restart when cooled down. · Step 3: Burner stop, followed by a Lock Out. A
manual reset is required. (display L16).
6.6. Flue passage check The air heater is equipped with a pressure switch that checks the passage of combustion air through the heat exchanger. The pressure switch checks if there is sufficient movement of combustion air through the heat exchanger (only during the pre-purge phase). If the pressure difference is too low, the air heater will not start. Error L-14 will be shown on the display.

NOTICE Delta-T regulation is automatically switched off when the delta-T sensor (sensor terminal J6) is disconnected.

6.4. Summer ventilation The fan can be set to run in the summer. Follow the instructions in the user manual of the special Room thermostat.

6.5. Overheating protection The air heater’s heat exchanger and flue system are both protected from excessive temperatures.

6.5.1. Heat exchanger An NTC sensor is located near (or on) the heat exchanger. This sensor monitors the heat exchanger temperature.

If the heat exchanger becomes too hot, this sensor will cause the heating process to stop. Depending on the temperature, the air heater performs the following actions:

· Step 1: Power reduction (when possible). · Step 2: Burner stop, followed by an automatic
restart when cooled down (display: E05 / E36). · Step 3: Burner stop, followed by a Lock Out. A
manual reset is required. (display L15).

NOTICE A manual reset can be done on the electronic
circuit board or remotely with the special room thermostat.

6.5.2. Flue system
The flue sensor (NTC) is an optional component that is located in the flue system of the air heater. This sensor monitors the flue temperature.

15

7. Commissioning the air heater
7.1. Adjusting the settings Prior to packaging, the safety and functioning of each
air heater is checked in detail. It is also set to the right
combustion efficiency.

In general, the heater does not need to be adjusted after installation. It is only necessary to perform a functional check and to obtain a flue gas analysis and record it for later reference.

CAUTION! Always adjust the burner settings of the heater using the manual test mode (see sect7.2.2.). Do not use the thermostat to adjust the burner settings.

CAUTION! Use only calibrated instruments to adjust the air heater.

CAUTION! Never carelessly turn the adjuster screws.

NOTICE Adjusting the control without a supporting flue gas analysis voids the warranty.

Only

adjust

the

CO 2

value

if

the

CO 2

reading

differs

more

than 0.2% from its setting. O2 value ± 0.3%.

7.2. Commissioning the air heater Once the unit is installed according to this manual, the unit can be commissioned. To do so, follow these instructions:

7.2.1. First use ­ thermostat To commission the air heater via the room thermostat, do the following:
· Put the thermostat in the highest position. The start sequence is always the same.
The air heater will burn for the minimal firing time (see sect6.2. for more information).
N7.O2T.2IC. E First use – display To commission the air heater via the display’s manual test mode, do the following:
NOTICE The display’s manual test mode will only work for maximum 10 minutes.
1. Press and hold the Return and (­) button for a few seconds (Fig 25). The display will alternate between Lo and St. This means the heater will start up in Low fire.
2. Press the (+) and (­) buttons to toggle between Low and High fire (Fig 25).
3. Press the (­) button until 0 is displayed to exit the service. The air heater will always cool down the heat exchanger for several minutes.
The test mode will automatically end after 10 minutes

1. Make sure the gas supply pipe is clean, gas tight and free from air.
2. Switch on the electric supply with the maintenance switch.

You are now able to observe the first start-up and become familiar with the functioning of the heater.

NOTICE If the gas line is not purged correctly, the heater will attempt to start twice before going into a lock-out condition. In this case, manual reset is necessary.

1. Instruct the end user of the about a safe use of the
air heater: ­ The presence of gas ­ The location of the manual gas valve
2. Instruct the end user abou the operation of the heater: ­ Lock-out indication ­ Reset
3. Instruct end user about the necessary
maintenance. 4. Leave this manual with the end user.

Fig 25. Using the heater display 16

8. Combustion settings
In principle, it is not necessary to adjust the gas valve shortly after commissioning the air heater. When the control does have to be adjusted after a period of use or after installing a new heater, this must be done by a qualified person using calibrated equipment.
DANGER! A poor adjustment can lead to overheating of the air heater and/or production of toxic carbon monoxide.
CAUTION! Always adjust the burner settings of the heater using the manual test mode (see sect7.2.2.). Do not use the thermostat to adjust the burner settings.
8.1. Adjusting the burner settings The flow of gas to the burner is controlled with a gas valve. This valve must be set to the high and a low power settings of the heater. When adjusting, the CO2 or O2 in flue gas has to be monitored with a calibrated analyser.
The gas valve is adjusted with two screws (Fig 27):
­ The Offset adjuster screw for Low fire. ­ The Gas/air adjuster screw for High fire.

NOTICE If the air heater does not ignite while sparking, close the air- openings of the gas-air mixer during ignition. Use your forefinger. The gas mixture will become richer and will ignite more easily.

Look for the correct CO value for the air heater in 2
sect3.2. Adjust the CO2 value if the difference is more then 0.2%. O2 value ± 0.3%.

Check

the

CO 2

value

in

High

fire

(Hi).

2. Turn the Ratio adjuster screw to the right to

decrease the CO value. 2
3. 3. Turn the Ratio adjuster screw to the left to

increase the CO2 value. 4. Check the CO2 value in Low fire (Lo). The CO2 value
in Low fire should be lower than in High fire.

5. Turn the Offset adjuster screw to the left to

decrease the CO value. 2
6. Turn the Offset adjust screw to the right to

increase the CO2 value. 7. Return to High fire (Hi) and readjust the CO2 value
with the Ratio adjust screw.

8. Return to Low fire (Lo) and readjust the CO2 value with the Offset adjuster screw.

9. Repeat the steps above until both CO2 values are ok.

P_in

P_Offset

Offset adjustment P_out

DANGER! Always measure the air heater’s CO production. Too much CO usually means the gas mixture is too rich. Adjust this if necessary with the two adjusters (fig 27). The concentration of CO should always be below 100 ppm.

Ratio adjustment

8.2. Converting to another gas type CAUTION! The air heater’s gas type may only be converted by the manufacturer or its representative. Contact your supplier for more information.

Fig 26. Main gas valve parts models SUH-S10+ to 60+

9. Troubleshooting
If the air heater malfunctions, first check if the problem is caused by external circumstances (e.g. no supply power). If the problem is not caused by external circumstances, use the tables and instructions in this chapter to fix the air heater.

1. Shut-off solenoid valve (EV1) 2. Offset adjuster screw 3. Pilot gas flow restrictor 4. Gas/air adjuster screw 5. Inlet pressure test point
6. Outlet pressure test point*
7. Shut-off solenoid valve (EV2)

8. Pilot outlet
9. Main gas outlet 10. Holes for fixing flanges (M5) 11. Supplementary valve body
fixing points 12. Air in signal

Fig 27. Main gas valve parts models SUH-S80+ to 120+

The air heater MUST first be commissioned at High fire.

NOTICE Please remember the built in waiting times of the air heater; the signals of the LED’s and the code on the display. Do not react too soon.

17

9.1. Volatile lock outs The table below describes the volatile lock outs that can occur. These can only be reset by hand.

Display

Error Type

L-0 Internal error

L-1 Ignition error

L-2 & 3 Internal error L-4 E-error L-5 Burner fan error

L-6 & 7 Burner fan error

L-8 to 12 L-13
L-14

Internal error
Pressure switch error Pressure switch error

L-15 Overheating

L-16
L17 to 19

Flue temperature error
Internal error

L-20 Flame error

L-21 Flame error

L-22 Flame error

L-25 Sensor error

L-26 Sensor error

L-27 to 31

Internal error

L-32 Sensor error

L33 to 38
L-42

Internal error
Flue temperature error

L-43 Overheating

Description Internal error Flame lasts only 5 seconds after ignition No flame after ignition Internal error E-error for more than 24 hrs Burner fan does not work Burner fan rotates at the wrong speed
Internal error
Pressure switch is closed in stand-by mode Pressure switch does not close during pre-purge Heat exchange sensor is overheated
Flue sensor is overheated
Internal error
Flame detected after closing the gas valve Flame detected before opening the gas valve. Flame failure during burning Heat exchange sensor failure Flue sensor failure
Internal error
Heat exchange sensor failure
Internal error
Too many flue temperature errors Heat exchange sensor is overheated too often

Case # 13 1
2 13 12 6 7
13
14
11
3
3
13
15
16 5 4 4 13
4
13
3
3

9.2. Temporary errors
The table below describes the temporary errors that can occur. These will disappear automatically after the cause has been resolved.

Display Error Type

E-00 to 04

Internal error

E-05 Overheating

E-06 to Internal error 13

E-14 Flame error

E15 to 19 & Internal error 22

E-20 & Heat exchanger 21 sensor error

E-23 & 24

Flue sensor error

E-27 & Heat exchanger 28 sensor error

E30 & 31

Flue sensor error

E-34

Reset button error

E-36 Overheating

E-38 & Heat exchanger 39 sensor error

E-47 & Heat exchanger 48 sensor error

E-49 to 64

Internal error

E-65 Voltage too low

E-66 Voltage too high

E-67

Pressure switch error

E-68

Flue temperature error

E-69

Configuration error

Description
Internal error
Heat exchange sensor is overheated Internal error
Flame detected when there shouldn’t be one
Internal error
Heat exchanger sensor not detected
Flue sensor not detected
Heat exchanger sensor short-circuit
Flue sensor short-circuit
Too many reset actions in a short timespan Heat exchanger sensor is overheated Heat exchanger sensor not detected Heat exchange sensor short-circuit
Internal error
Supply voltage is too low for over 1 minute Supply voltage is too high for over 1 minute Too many pressure switch errors
Flue sensor is overheated
Heater configuration error

Case # 13 3 13 16 13 4 4 4 4 9 3 4 4 13
11 3 19

9.3. Warnings The table below describes the temporary warnings that can occur. The heater may still be working, or stops until
the cause has been resolved.

Display

Error Type

A-02

Configuration error

A-07 Overheating

A-08 Overheating

Description Heater configuration error

Case # 19

Heat exchange sensor is

3

almost overheated

Flue sensor is almost

13

overheated

18

9.4. Instructions After identifying the problem, use the Case number to find the possible cause in this paragraph.
Case 1: Flame lasts only 5 seconds after ignition.
· The flame is not detected: ­ Check the ignition/ionisation cable and the electrode. The cable should have a resistance of 1 k.
· The air heater is not earthed properly. · The circuit board is defective.
Case 2: No flame after ignition.
· There is not enough gas pressure. · The gas mixture is too poor:
­ Adjust the gas valve (see sect8.1.). · The gas valve does not open:
­ During ignition, check for a 230 V voltage on the valve.
· Check if the ignition electrode sparks. If not: ­ Check the cable and electrode and replace them when damaged. ­ Check the burner control unit and replace it when it does not give a spark output.

­ Check the gas supply pressure while the heater is burning.
· The burner pressure for Low fire is too low. This causes the flame to extinguish because it is too small to be detected. ­ Check the burner pressure at Low fire and adjust if necessary (see sect8.1).
· Recirculation of flue gas. Due to a problem with the flue terminal the flue gas is sucked back into the air inlet. This results into a lack of oxygen and causes the flame to stop. ­ Check the flue system and fresh air supply. Only certified, original parts should be used.
Case 6: Burner fan does not work.
· Check if the burner fan is blocked. · Check if the wiring is damaged. · The burner fan is defective.
Case 7: Burner fan rotates at the wrong speed.
· Check if the burner fan runs smoothly. · Check if the wiring is damaged.
Case 9: Too many reset actions in a short timespan.

Case 3: Heat exchanger sensor or flue sensor is overheated.

· This error will disappear after some time or if the main power is disconnected for a while.

· Check if the connectors J12 and J6 are plugged in correctly and if the connection J12[1-4] (optional overheating protection) is closed.
· Check if the system fan supplies enough air. · Check the settings of the gas valve. The heater
may be overfired. If so: ­ Adjust the burner pressure.

Case 11: Insufficient air passage through the heat exchanger. Pressure switch does not close.
· Check if the combustion fan is running. · Check if the flue system is blocked or restricted. · Check the pressure switch and the connections. · Check the heat exchanger for flue leakage.

Case 4: Heat exchange sensor or flue sensor not detected, or short circuit.
NOTICE L-25 refers to the heat exchange sensor. L-26 refers to the flue sensor, if applicable.
· The heat exchange sensor consists of two internal sensors. The readings of these sensors may differ too much: ­ Measure the resistance of each sensor. The resistance should be 20 K at 25 °C and 25 K at 20 °C. ­ If the measured values differ too much, replace the sensor.
Case 5: Too many flame failures while burning.
· The gas supply is not constant. This results in a drop in gas supply pressure while burning and causes the flame to extinguish.

Case 12: E-error for more than 24 hours.
· Switch the air heater off and on and check the error code.
Case 13: Internal error.
· Isolate the electrical supply and reenergise. If this does not help: ­ Replace the burner control unit.
Case 14: Pressure switch is closed in stand-by mode.
· Check if the contact is stuck. If so: ­ Replace the pressure switch.
· Check if there is water in the hose. If so: ­ Dry the hose.

19

Case 15: Flame detected after closing the gas valve.
· Check if the gas valve closes too slow. If so: ­ Replace the gas valve.
· Check if the ionisation electrode is wet. If so: ­ Dry, clean or replace the electrode.
Case 16: Flame detected before opening the gas valve.

10. Maintenance
CAUTION! The air heater must be inspected and cleaned once a year by a qualified installer with sufficient knowledge about the device.
CAUTION! Sufficient maintenance is critical in circumstances such as high humidity, dust, high switching on/off frequency, etc.

· Check if there really is a flame before ignition. If so: ­ Replace the gas valve.
· Check if the ionisation electrode is wet. If so: ­ Dry, clean or replace the electrode.
Case 19: Heater configuration error
· The heater does not know which program to run, due to a mismatch between the burner control unit and the display. If so: ­ Contact your supplier.
9.5. Further troubleshooting When the air heater does start but shows a different problem than described above, check if the following problems apply.

10.1. Preparation Before performing maintenance on an air heater that is already installed, do the following:
1. Set the thermostat to the lowest setting. 2. Close the manual gas valve. 3. Turn off the power supply to the air heater using
the maintenance switch.
CAUTION! Always check for gas leaks after working on the air heater.
CCAAUUTTIIOONN!! Do not use water when cleaning the air heater.
CAUTION! The heater must be electrically isolated during servicing.

9.5.1. Explosive ignition and/or frequent flame failures
· Check if the gas control settings are correct (see sect8.1). A correct CO2 value is important for a proper ignition.
· Check the ignition cable. It should have a resistance of 1 k.
· Check the position of the ignition electrode. The spark has to be formed between the two electrodes, not between the electrode and the burner.
9.5.2. Insufficient output The heat output of the air heater is insufficient if there is too much resistance in the inlet or outlet flue system. The burner fan still rotates at full speed, but the resistance prevents enough gas mixture from entering the burner.
· Check the flue system for blockage. · Check the burner for dust or other pollution.
9.5.3. Non modulating system fan System fan (M1) sometimes does not start or does not vary in speed.
· Check the functioning of this fan by connecting it to a supply of 230 V.
· Check if the fan is energised. Use a multi-meter. If so, the cause of the problem lies in the burner control unit.
20

10.2. Basic maintenance To perform basic maintenance on the air heater, do the following:
CAUTION! When cleaning parts of the air heater, use a dry cloth, brush, compressed air or a vacuum cleaner. Never use a steel brush.
1. Inspect the outside of the heat exchanger. 2. Clean the fan guard on the outside of the heater.
Clean the fan blades if required. 3. Open the access panel. 4. Clean the inside of the air heater. Focus on the
following parts: ­ Body ­ Fan blades and motor ­ Heat exchanger ­ Temperature sensor ­ Vane switch (if present)
5. Check if the wiring, nuts and bolts are properly secured and tightened.
6. Grease any parts and bolts that are regularly loosened for maintenance.
7. Open the manual gas valve in the supply line and check if the supply lines are air tight, do not leak and do not contain air.
Some checks can only be performed when the heater is running. Do the following:
1. Reconnect the air heater to the power supply.

2. Switch on the air heater. 3. Check if the heater operates without problems.
See sect9. if any errors occur. 4. Check the air heater’s combustion efficiency. If
necessary: ­ Adjust the burner settings (see §8.1.).
10.3. Maintenance of the burner unit The burner unit is an important part of the air heater and requires special maintenance.

10.4. Maintenance in dusty environments The grid in front of the burner may become clogged in dusty environments.
1. Remove the burner fan. 2. Clean the grid with a brush and a vacuum cleaner. 3. Place the burner fan back.

To perform maintenance on the burner unit, do the following:

1. Remove the gas pipe between the gas valve and the combustion fan.
2. Remove the ignition and fan wires. 3. Unscrew the socket screws (M6). 4. Remove the burner unit from the air heater,
complete with flange and pre-mix fan. 5. Disassemble the burner unit.
6. Adjust the ignition electrode: a. The distance between the electrode and the burner should be 5.0 (±0.5) mm (figure 28). b. The distance between the two electrodes should be 3.6 (±0.4) mm (figure 29). c. Check the setting of the ignition electrode. The spark should be formed between the two electrodes, not between the electrode and the burner.

Fig 29. The grid in front of the burner

Fig 28. Distance between the electrode and burner
Fig 29. Distance between the two electrodes 7. Reassemble the burner unit and install it back in the
air heater. ­ Use new gaskets. 21

11. Electrical wiring diagram
A complete electrical wiring diagram is shown in Fig 31, 33, 35 & 37. The connections that are most important to the
installation process are shown in figure .

C3 C6

21 (0-10V)
20 (GND)
RT

K6
T4 T2 R1

K6
11 13
20K@25°C
100K@25°C 1K

dP S2

T1

20K@25°C 20K@25°C

C2

4

22°C

C4

5

J9- 1 J9- 3 J9- 2 J9- 4
J6- 1 J6- 8 J6- 2 J6- 9 J6- 3 J6- 10 J6- 4 J6- 11 J6- 5 J6- 12 J6- 6 J6- 13 J6- 7 J6- 14

T1
J17 J2-1..6
J1- 1 J1- 5 J1- 2 J1- 6 J1- 3 J1- 7
F1: 5AT J1- 4
J1- 8
J3- 2 J3- 6 J3- 1 J3- 7 J3- 3

J7- 1 J7- 2 J7- 3 J7- 4 J7- 5 J7- 6

J3- 8 J3- 4 J3- 9 J3- 5 J3- 10

J7- 7 J7- 8 J7- 9 J7- 10 J12- 1 J12- 4 J12- 2

J4- 2 J4- 3 J4- 5 J4- 4 J4- 1 J4- 6

J12- 5

J12- 3

J5- 1

J12- 6

Modbus

1 A/+

31 J16

2 B/-

42

3 24V

4 GND

J8- 1

J8- 2

J25 4 3 21

J5- 2 J5- 4 J5- 3 LED RESET

I1

PE

N

E1 P1

L

PE

L triac

12

11

K6 A2

A1

M2
9 (L)
A1 10 (A1)
8 (N)

1 2 3 4 5
L N

M3 V1

43 21

43 21

D2 D1

Fig 31. Electrical wiring diagram SUH-S10+ to 60+ (AC fan models)

Fig 32. Main installer connections SUH-S10+ to 60+ (AC fan models) 22

C3 C6

21 (0-10V)
20 (GND)
RT

K6
T4 T2 R1

K6
11 13
20K@25°C
100K@25°C 1K

M10 EC

J15-2 0-10V J15-3 GND

dP

S2

T1

20K@25°C 20K@25°C

C2

4

22°C

C4

5

J9- 1 J9- 3 J9- 2 J9- 4

T1 J17 J2-1..6

J6- 1

J6- 8 J6- 2 J6- 9 J6- 3 J6- 10 J6- 4 J6- 11 J6- 5 J6- 12 J6- 6

J1- 1 J1- 5 J1- 2 J1- 6 J1- 3 J1- 7
F1: 5AT J1- 4
J1- 8
J3- 2

J6- 13

J3- 6

J6- 7 J6- 14 123 4 5 6 J15 J7- 1 J7- 2 J7- 3 J7- 4 J7- 5 J7- 6 J7- 7 J7- 8 J7- 9 J7- 10 J12- 1 J12- 4 J12- 2

J3- 1 J3- 7 J3- 3
J3- 8 J3- 4 J3- 9 J3- 5 J3- 10
J4- 2 J4- 3 J4- 5 J4- 4 J4- 1 J4- 6

J12- 5

J12- 3

J5- 1

J12- 6

Modbus

1 A/+

31 J16

2 B/-

42

3 24V

4 GND

J8- 1

J8- 2

J25 4 3 21

J5- 2 J5- 4 J5- 3 LED RESET

EC

K6 A2

A1

1 2 3 4 5
L N

I1 PE N P1 L
M10 PE
9 (L)
A1 10 (A1)
8 (N)
M3
V1

43 21

43 21

D2 D1

Fig 33. Electrical wiring diagram SUH-S10+ to 60+ (EC fan models)

Fig 34. Main installer connections SUH-S10+ to 60+ (EC fan models)

23

C3 C6

21 (0-10V)
20 (GND)
RT

K6
T4 T2 R1

K6
11 13

20K@25°C

100K@25°C

3,9K

dP S2

T1

20K@25°C 20K@25°C

C2

4

22°C

C4

5

J9- 1 J9- 3 J9- 2 J9- 4
J6- 1 J6- 8 J6- 2 J6- 9 J6- 3 J6- 10 J6- 4 J6- 11 J6- 5 J6- 12 J6- 6 J6- 13 J6- 7 J6- 14

T1
J17 J2-1..6
J1- 1 J1- 5 J1- 2 J1- 6 J1- 3 J1- 7
F1: 5AT J1- 4
J1- 8
J3- 2 J3- 6 J3- 1 J3- 7 J3- 3

J7- 1 J7- 2 J7- 3 J7- 4 J7- 5 J7- 6

J3- 8 J3- 4 J3- 9 J3- 5 J3- 10

J7- 7 J7- 8 J7- 9 J7- 10 J12- 1 J12- 4 J12- 2

J4- 2 J4- 3 J4- 5 J4- 4 J4- 1 J4- 6

J12- 5

J12- 3

J5- 1

J12- 6

Modbus

1 A/+

3 1 J16 2 B/-

42

3 24V

4 GND

J8- 1

J8- 2

J25 4 3 21

J5- 2 J5- 4 J5- 3 LED RESET

I1

PE

N

E1 P1

L

21

11
K9

14

22

M12

PE

L triac 12

N
11

K6 A2

A1

M11
9 (L)
A1 10 (A1)
8 (N)

1 2 3 4 5
L N

M3 V1

43 21

43 21

D2 D1

Fig 35. Electrical wiring diagram SUH-S80+ to 120+ (AC fan models)

Fig 36. Main installer connections SUH-S80+ to 120+ (AC fan models)

24

C3 C6

21 (0-10V)
20 (GND)
RT

K6
T4 T2 R1

K6
11 13

20K@25°C

100K@25°C

3,9K

M10 EC

J15-2 0-10V J15-3 GND

dP

S2

T1

20K@25°C 20K@25°C

C2

4

22°C

C4

5

J9- 1 J9- 3 J9- 2 J9- 4

T1 J17 J2-1..6

J6- 1

J6- 8 J6- 2 J6- 9 J6- 3 J6- 10 J6- 4 J6- 11 J6- 5 J6- 12 J6- 6

J1- 1 J1- 5 J1- 2 J1- 6 J1- 3 J1- 7
F1: 5AT J1- 4
J1- 8
J3- 2

J6- 13

J3- 6

J6- 7

J3- 1

J6- 14 1 23 4 5 6 J15
J7- 1 J7- 2 J7- 3 J7- 4 J7- 5 J7- 6

J3- 7 J3- 3
J3- 8 J3- 4 J3- 9 J3- 5 J3- 10

J7- 7 J7- 8 J7- 9 J7- 10 J12- 1 J12- 4 J12- 2

J4- 2 J4- 3 J4- 5 J4- 4 J4- 1 J4- 6

J12- 5

J12- 3

J5- 1

J12- 6

Modbus

1 A/+

31 4 2 J16

2 B/3 24V

4 GND

J8- 1

J8- 2

J25 4 3 21

J5- 2 J5- 4 J5- 3 LED RESET

L on/off

I1

PE

N

P1

L

M10 M10
M12 M12
PE

K6 A2

A1

9 (L)
A1 10 (A1)
8 (N)

M12 10v out M12 0-10v in

11
K9
13

K9

1 2 3 4 5
L N

M3 V1

43 21

43 21

D2 D1

Fig 37. Electrical wiring diagram SUH-S80+ to 120+ (EC fan models)

Fig 38. Main installer connections SUH-S80+ to 120+ (EC fan models)

25

12. Exploded view and spare parts
The parts of the air heater are shown in an exploded view (Figs 39 & 40). The table below describes each part and
shows the correct article number for a replacement part.

Fig 39. Exploded view of models SUH-S10+ to 60+

Fig 34. Exploded view of models SUH-S80+ to 120+

No

Description

1 Burner set (nat gas)

1 Burner set (propane)

2 Ignition/ionisation set

5 Burner fan

6 Gas valve

7 System fan

8

Burner control unit (EBM966)

9 Pressure switch

10 Heat exchanger sensor

11 Gasket set

12 Burner ionisation

13 Delta-T sensor

14 Display PCB

15 Flue sensor

SUH-S 10+ GA3260 GA3224-2 GA3460 GY4523 GA3000 GX4201

SUH-S 20+ GA3262 GA3226-2 GA3460 GY4523 GA3000 GX4204

SUH-S 30+ GA3264 GA3228-2 GA3460 GY4523 GA3000 GX4204

SUH-S 40+ GA3266 GA3234-2 GA3460 GY4523 GA3000 GX4206

SUH-S 50+ GA3266 GA3230-2 GA3460 GY4523 GA3000 GX4217

SUH-S 60+ GA3268 GA3232-2 GA3460 GY4523 GA3000 GX4217

SUH-S 80+ –
GA3236-2 GA3460 GY4502 GY3002 GX4212 x 4

SUH-S 100+ SUH-S 120+

–

–

GA3236-2 GA3236-2

GA3460

GA3460

GY4502

GY4502

GY3002

GY3002

GX4212 x 4 GX4214 x 4

GY5901

GY5901

GY5901

GY5901

GY5901

GY5901

GY5901

GY5901

GY5901

GX3932 GY3932 GA6702 GA6700 GY3931 GY5902 GX3931

GX3932 GY3932 GA6702 GA6700 GY3931 GY5902 GX3931

GX3932 GY3932 GA6702 GA6700 GY3931 GY5902 GX3931

GX3932 GY3932 GA6706 GA6704 GY3931 GY5902 GX3931

GX3932 GY3932 GA6706 GA6704 GY3931 GY5902 GX3931

GX3932 GY3932 GA6706 GA6704 GY3931 GY5902 GX3931

GX3932 GY3933 GA6707 GX6730 GY3931 GY5902 GX3931

GX3932 GY3933 GA6707 GX6730 GY3931 GY5902 GX3931

GX3932 GY3933 GA6707 GX6730 GY3931 GY5902 GX3931

26

13. Declaration of conformity
Gas Fired Products (UK) Ltd. Chapel Lane Claydon Ipswich Suffolk, IP6 0JL United Kingdom
Declares that air heater types: SUH-S10+, SUH-S20+, SUH-S30+, SUH-S40+, SUH-S50+, SUH-S60+, SUH-S80+, SUH-S100+ & SUH-S120+
CE PIN: 0063BO3156
Are in accordance with the essential requirements of the relevant EU directives, being: 2016/426/EU (GAR) relating to appliances burning gaseous fuels 2014/35/EU (LVD) relating to the electric safety of appliances 2014/30/EU (EMC) relating to electromagnetic compatibility of appliances 2006/42/EG (MD) relating to the safety of machinery
Goods should be installed and used in accordance with our instructions and with the applicable local and international rules. Installation should be done by an authorized, qualified and competent installer. Ipswich, December 23rd 2021
S. Richter
14. Disposal and recycling
The meaning of the symbol on the material, its accessory or packaging indicates that this product shall not be treated as household waste. Please, dispose of this equipment at your applicable collection point for the recycling of electrical and electronic equipments waste. In the European Union and Other European countries where there are separate collection systems for used electrical and electronic product. By ensuring the correct disposal of this product, you will help prevent potential hazards to the environment and to human health, which could otherwise be caused by unsuitable waste handling of this product. The recycling of materials will help conserve natural resources. Please do not therefore dispose of your old electrical and electronic equipment with your household waste.
27

®
Tel: +44(0)1473 830 551 Fax: +44(0)1473 832055
www.spaceray.co.uk info@spaceray.co.uk
Gas Fired Products (UK) Ltd Chapel Lane Claydon Ipswich
Suffolk, IP6 0JL
FACTORIES: IPSWICH, ENGLAND – CHARLOTTE, N.C, U.S.A
SUH-S+ Manual Feb 2024

References

• Space-Ray Heating Solutions - Space-Ray

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