WaTER CIRCULaTION sysTEM
1.
2.
3. With the system still hot, turn off the gas, water and
electricity supplies to the boiler and drain down to complete
Note: A ushing solution should be used during the ushing
procedure. Flushing solutions: Fernox Superoc,
Sentinel X300 (new systems) or X400 (existing
systems). Refer to Frame 5.
4.
5. Reset the system initial pressure to the design
6.
7. Check the condensate drain for leaks and check that it is
8.
Note: The pump will operate briey as a self-check once every
24 hours in the absence of any system demand.
WaTER TEMpERaTUREs
33
gENERaL ChECKs
DOMEsTIC hOT WaTER (DhW) MODE
1.
then:
2. Close all taps except the furthest one from the boiler and check
approximately 35
o
3.
check that the boiler modulates to deliver DHW at approximately
o
4.
sequence should read:
When the pump stops the display sequence should read:
Note. On systems in excess of 2 bar inlet pressure a water
pressure governor may be required to prevent water noise.
CENTRaL hEa TINg (Ch)
& DOMEsTIC hOT Wa TER (DhW) MODE.
1.
2.
3. gas Rate
Check the boiler gas rate when the boiler is at full DHW
4.
5.
should go off and the pump continue to run for two minutes
6.
Make the following checks for correct operation in:
Knob setting Ch Flow Temp
o
C
(
o
F)
DhW Outlet Temp
o
C (
o
F)
Max
Min 45 (113) 40 (104)
INsTaLLa TION
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