When an additive is added to the CH water, this should
be suitable for the materials used in the appliance, such
as copper, brass, stainless steel, steel, plastic and
rubber.
1. Fill the system to a maximum pressure of 1 to 2 bar with a cold system.
2. De-aerate the appliance with the manual air vent (A).
Alternatively, an automatic air vent can be mounted to the appliance
instead of the manual air vent.
3. De-aerate the system with the manual air vents on the radiators.
4. Fill up the CH system when the pressure has dropped too low as a result
of the de-aerating.
5. Check all joints for leaks.
6. Fill the siphon with water. See § 6.4 for the filling procedure.
7.1.2 Hot water supply
1. Open the main tap in order to pressurise the hot water part.
2. De-aerate the heat exchanger and the pipe system by opening a hot
water tap.
Leave the tap open until all the air has left the system.
3. Check all joints for leaks.
7.1.3 Gas supply
1. De-aerate the gas pipe with the inlet pressure measuring nipple on the
gas valve.
2. Check the connections for leaks.
3. Check the inlet pressure and the burner pressure. See Gas and air
control.
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