GRANT COMSOL3 CombiSOL Solar Hot Water Control Instruction Manual
- May 15, 2024
- GRANT
Table of Contents
Grant CombiSOL
Solar Hot Water Control
Installation Instructions
COMSOL3 CombiSOL Solar Hot Water Control
UK
| DOC 0076 | Rev 1.0 | January 2024
IMPORTANT NOTE FOR INSTALLERS
These instructions are intended to guide installers on the installation and
commissioning of the Grant CombiSOL System.
After installing the Grant CombiSOL System, leave these instructions with the
user.
SERVICING
The Grant CombiSOL System should be serviced as part of the Solar Thermal
System every 12 months. Refer to Solar Thermal System Installation and User
instructions for further information (DOC 0073).
PRODUCT CODES COVERED
These instructions cover the installation of the Grant CombiSOL System
(product code: COMSOL3) as part of a number of different kits. The various
kits available provide on-roof, flat roof and in-roof solutions, with
different orientations and quantities of collectors being considered.
Please contact Grant UK for information on the various Solar Thermal Collector
kits available.
Tel: +44 (0)1380 736920, Email: [email protected]
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.
GRANT ENGINEERING (UK) LIMITED
Frankland Road, Blagrove Industrial Estate, Swindon, SN5 8YG
Tel: +44 (0)1380 736920 Fax: +44 (0)1380 736991
Email: [email protected]
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This manual is accurate at the date of printing but will be superseded and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.
General
1.1 PRODUCT DESCRIPTION
The Grant CombiSOL System uses the Intasol manifold as a hot water diverter
control for use with combination boilers. This means that a solar thermal
system can now be linked with a combi boiler as back-up.
Cross-flow contamination is eliminated by the clever deployment of non-return
valves integrated within the manifold. Refer to Figure 1-1.
The Grant CombiSOL System allows unvented hot water heated by solar thermal
panels, to be used safely with a combination boiler. The Grant system
automatically harnesses the thermal energy contained in a solar water storage
system to provide hot water at a controlled, optimum temperature.
The Grant CombiSOL System uses the Intasol manifold that is supplied complete
with a TMV2 thermostatic mixing valve, thermostatic diverting valve,
thermostatic blending valve and integral non-return valves.
The system ensures that the user always receives hot water at the set
temperature, and diverts cooler water at 28°C to activate the boiler when the
temperature of the water coming from the solar storage cylinder falls below
48°C.
Its compact design means that all the valves are housed in the Intasol
manifold, and it’s supplied complete with connections suitable for 15mm copper
pipe.
1.2 HIGH TEMPERATURE SOLAR SYSTEM
The temperature of the domestic water in solar thermal system can reach very
high temperatures over long periods.
In Summer, especially if there is little water usage, the hot water can reach
a temperature of around 98°C before the temperature and pressure safety relief
valves are actuated.
At these temperatures, the hot water cannot be used directly because of the
risk of scalding to the user.
Water temperatures over 50°C can cause burns very quickly. At 55°C, partial
burns occur after 30 seconds immersion. At 60°C they can occur in as little as
5 seconds.
The Intasol manifold incorporates a TMV2 thermostatic mixing valve which
blends the hot and cold water to deliver blended water at safe temperature for
users.
1.3 KIT CONTENTS
Table 1-1: Kit contents
Kit contents
1 x Intasol manifold
3 x 15 mm connectors (c/w non return valves and filter)
2 x 15mm connectors
5 x sealing washers
1 x Installation Instructions
Technical Data
2.1 COMBISOL TECHNICAL DATA
Table 2-1: Technical data
Technical specification
Connections| 15mm compression for copper tube
Body material| DZR copper allow BS EN 12164 CW602N
Shutter| UDEL GF-120NT
Spring| Stainless steel AISI 302
Thermostatic mixing valve|
Maximum working pressure| 10 bar (static), 5 bar (dynamic)
Adjustment range| 35 to 55°C
Accuracy| ±2°C
Maximum inlet temperature| 100°C
Maximum inlet pressure ratio (H/C or C/H)| 2:01
Minimum temperature difference between the inlet hot water and the outlet
mixed water to ensure anti-scald performance| 10°C
Minimum flow rate for stable operation| 6 litres/minute
Thermostatic diverting valve
Maximum working pressure| 10 bar (static), 5 bar (dynamic)
Factory set| 48°C
Maximum inlet temperature| 100°C
Thermostatic blending valve
Maximum working pressure| 10 bar (static), 5 bar (dynamic)
Factory set| 28°C
Maximum inlet temperature| 90°C
2.2 DIMENSIONS
Operation
3.1 OPERATION EXAMPLE 1
DHW heated by Solar collectors is delivered direct to hot taps after mixing
with cold to give a safe temperature. Refer to Figure 3-1.
3.2 OPERATION EXAMPLE 2
When DHW from cylinder is only warm (or cold), the CombiSOL System diverts the
water to the combi boiler, heating the DHW. DHW is mixed with cold in the
Intasol manifold to maintain safe temperatures. Refer to FIgure 3-2.
solar hot water not available, so diverted to combi boiler.
Water is “mixed down” to 28°C then heated by the boiler and sent to the taps
via the mixing valve.
Figure 3-2: Operation example 2
Schematics
4.1 OPTIMAL SOLAR HEATING CONDITIONS
Figure 4-1: Optimum solar
heating conditions
4.2 SOLAR HEAT UNAVAILABLE
Figure 4-2: Solar heat unavailable
4.3 TYPICAL CIRCUIT USING COMBISOL
The Intasol manifold should preferably be installed close to the boiler, on
the outlet from the solar hot water storage, to ensure a constant temperature
of mixed water is supplied to users.
The CombiSOL System should be fitted in a circuit similar to the one
illustrated below. Refer to Figure 4-3.
To ensure that maintenance, commissioning and testing can be undertaken
easily, the manifold must be installed in an accessible position.
Given the flow characteristics of the integral thermostatic mixing valve, the
CombiSOL System can be used for a single outlet, e.g. washbasin, shower or for
multiple outlets.
To ensure that the mixed water is supplied at the set temperature, a minimum
flow rate of 6 litres per minute is required.
The installation of thermostatic mixing valves must comply with the
requirements of the Water Supply (Water Fittings) Regulations 1999.
Installation in domestic properties must comply with the requirements of
Approved Document G3.
In particular, the supply of hot water to any fixed bath in an a build
property, or where there is a material change of use in an existing property
to create the location for a bath, must be designed to ensure that the
temperature of the water delivered to that bath does not exceed 48°C. As any
device limiting this maximum water temperature cannot be easily altered by the
users, a suitable separate TMV would be required on the supply to any such
bath.
For installation in non-domestic applications, e.g. Healthcare premises, Care
homes, schools, etc. please refer to the TMVA Recommended Code of Practice for
Safe Water Temperatures for further guidance.
! WARNING !
The Grant CombiSOL System is not intended to act as a means of preventing
bacteria (including legionella) in hot water systems. It is the responsibility
of the installer to ensure that suitable protection is provided to control the
growth of any bacteria in the hot water system.
! NOTE !
Refer to unvented cylinder or Thermal Store manufacturer’s Installation
Instructions when connecting the cold mains supply
Components
5.1 COMPONENTS
5.1.1 Reverse view
Fault finding
Problem solving:
-
Hot water at the cold tap.
• Operation of the check valve is hindered. Confirm that the valve is seated correctly.
• Check valves not fitted.
• Unbalanced hot/cold supply pressure. -
Fluctuating mixed water temperature.
• Erratic supply temperatures at the valve inlet.
• Starvation of the water supplied at the valve inlets.
• Incorrect commissioning of the valve. -
Erratic flow.
• Insufficient water supplies.
• Fluctuations of the water supply pressures/temperatures.
• Adverse effect created by other draw-off points of the system. -
No flow/reduced flow from valve.
• In line filters are blocked.
• Insufficient supply pressure.
• Debris obstructing valve operation.
• Valve requires servicing (servicing kits available on request). -
Valve does not “fail safe” when tested.
• Installation not in accordance with our recommendations.
• The minimum temperature differential has not been achieved.
• Internal mechanism hindered by debris.
The following details are provided to answer on-site queries. If you require any further assistance, please contact our Technical team on +44 (0)1380 736920
Notes
GRANT ENGINEERING (UK) LIMITED
Frankland Road, Blagrove Industrial Estate, Swindon, SN5 8YG
Tel: +44 (0)1380 736920 Fax: +44 (0)1380 736991
Email: [email protected]
www.grantuk.com