Supplied By www.heating spares.co Tel. 0161 620 6677
29
220692C
29
SECTION
7
Completion and Commissioning
Sealed Water
Systems Only
Flush the whole system without the pump in place.
Refit the pump and fill the system until the pressure
gauge registers 1.5bar (21.5lbf/in
2
). Clear any airlocks
and check for water soundness.
Check the operation of the safety valve, by allowing
the water pressure to rise until the valve opens.
The valve should open /-0.3bar (+/-4.3lbf/in
2
)
of 3bar (42.6lbf/in
2
). Where this is not possible
conduct a manual check and test.
Release cold water to initial system design pressure.
The set pointer on the pressure gauge should be set to
the initial design pressure.
If air is present in the system, this may, in certain
circumstances, cause the overheat thermostat to trip. If
this occurs advise the user to operate the control
thermostat on a low setting until all air has been
expelled.
System
Commissioning - All
Systems
Commissioning should be carried out by a competent
person in accordance with the current issue of BS6798.
Make sure that the system has been thoroughly flushed
out with cold water without the pump in place. Refit
the pump, fill the system with water, making sure that
all air is properly vented from the system and pump.
Clear any airlocks and check for water soundness.
