gledhill GB10 Installation And Servicing Instructions page 14

Safety valve setting (bar)
Vessel charge pressure (bar)
Initial system fill pressure (bar)
Total system water content (l)
25
50
75
100
125
150
(f) Water Makeup
Provision should be made for replacing the water loss from the system using a makeup bottle mounted
in a position higher than the highest point of the system, connected through the non-return valve to the
return side of either central heating or hot water cylinder circuit.
Alternatively, provision for water makeup can be made using a filling loop, in an accessible position on
the return, or an approved CA device as discussed below.
(g) Filling a Sealed Heating System
Provision for filling a sealed system at low level must be made and the method selected must comply
with the Water regulations. The temporary filling loop method is shown in diagram 3.5 and the CA-
device method is shown in diagram 3.6.
The CA device normally requires a pressure differential to operate and this should be taken into
account when selecting the device and the system operating pressures.
There must be no permanent connection to the mains supply, even through a non-return valve.
1 1
3 3
3 3
4 4
1. Control/Isolating valve 1. Control/Isolating valve
Boiler Boiler
2. Double check valve 2. Double check valve
3. Hose unions 3. Hose unions
4. Temporary connection 4. Temporary connection
Diagram 3.5 Sealed system filling method 1 Diagram 3.5 Sealed system filling method 1
3.5.3. Gledhill BoilerMate Heating System
The Gledhill Boiler is also suitable for use with a Gledhill BoilerMate; an integrated open vented heating
system and mains pressure hot water appliance. This appliance is supplied with factory fitted and wired
system controls and equipment e.g. pumps, valves etc. The BoilerMate uses a directly heated open vented
primary store and is suitable for only vented heating systems as shown schematically in diagram 3.7. For
further details refer to Gledhill BoilerMate manual.
VER: 02.3 _260505
Supplied By www.heating spares.co Tel. 0161 620 6677
Table 3.3 Expansion vessel volume required
0.5 1.0
2.1 3.5
4.2 7.0
6.3 10.5
8.3 14.0
10.4 17.5
12.5 21.0
Flow Flow
Return Return
1 1
2 2
Supply pipe Supply pipe
Boiler Boiler
3.0
0.5
1.5 2.0 1.0
Expansion vessel volume (litres)
6.5 13.7 2.7
12.9 27.5 5.4
19.4 41.3 8.2
25.9 55.1 10.9
32.4 68.9 13.6
38.8 82.6 16.3
Flow Flow
Return Return
1 1
1 1
5 5
2 2
Supply Supply
4 4
pipe pipe
3 3
Diagram 3.6 Sealed system filling method 2 Diagram 3.6 Sealed system filling method 2
1.0 1.5
1.5 2.0 1.5 2.0
4.7 10.3 3.9 8.3
9.5 20.6 7.8 16.5
14.2 30.9 11.7 24.8
19.0 41.2 15.6 33.1
23.7 51.5 19.5 41.3
28.6 61.8 23.4 49.6
1. Control/Isolating valve 1. Control/Isolating valve
2. Type CA Backflow 2. Type CA Backflow
Prevention device Prevention device
3. Tundish 3. Tundish
4. Air Gap 4. Air Gap
5. Pressure regulator 5. Pressure regulator
(optional) (optional)
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