59
saFETy RELIEF V aLVE RENEWaL
1.
2.
3.
4
5. Disconnect the electrical connection from the return
6. Disconnect the 22mm pipe connection at the rear of
7.
exchanger swing the pipe to clear the pump and
8.
9.
10.
11. Fit the new safety valve and reassemble in reverse
12.
1.
2.
3.
4. Fit new pressure gauge, using suitable jointing
5.
6.
58
pREssURE gaUgE RENEW aL
7
5
10
57
DRaININg ThE BOILER
3G9690
DOMEsTIC hOT WaTER CIRCUIT
1.
2.
3.
DHW circuit, depending on the location of the boiler, opening the lowest hot water tap may drain this
4.
After replacing any component on the boiler, close tap, open the DHW isolation valve and open all system
5.
6.
CENTRaL hEa TINg CIRCUIT
1.
2.
3.
4. After replacing any component on the boiler, remove the hose,
close the drain valve and open all system isolating valves (re-
5.
6.
Gas CH
Return
Filling Loop
DHW
Inlet
DHW
Outlet
CH
Circuit
Drain
CH
Flow
sERVICINg
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