Intergas Heating Ltd
20
8
CONNECTION
8.1
Connecting CH installation
1.
Flush the CH system thoroughly (please refer to current Standard Codes of
Practice).
2.
Fit the flow and return pipes to the isolation valves.
3.
All pipes must be fitted unstressed in order to prevent the pipes from ticking.
4.
Existing connections must not be twisted, in order to avoid leakages.
Make sure the compression fittings are thightened thoroughly to prevent leakage.
8.1.1
The CH system should be equipped with:
•
A drain tap in the return pipe immediately below the appliance.
•
A drain tap at the lowest point(s) of the installation.
•
A non return valve, if pipes run upwards at a short distance from the appliance. This
avoids the occurrence of thermosyphon effect during DHW operation mode.
8.1.2
Thermostatic radiator valves
If all radiators are equipped with thermostatic or radiator valves, an auto bypass must
be fitted in order to guarantee minimum water circulation. The auto bypass must be as
far as possible from the appliance in order to prevent overheating of the appliance.
8.1.3
Floor heating
For effective operation of the DHW supply any undesired circulation through the
appliance as a result of a second pump in the CH circuit must be avoided.
Connect the floor heating system in a hydraulically neutral manner to the appliance, or
equip the CH circuit with an electric shut-off valve or check valve to prevent flow
through the appliance when there is no CH request for heat.
Connection diagram for floor heating
A.
Boiler
B.
Pump
C.
Floor heating valve
D.
Non return valve (spring operated)
E.
Electrical valve 230 V AC
F.
Radiators
G.
Room thermostat
H.
Maximum thermostat