47
sERVICINg
Ideal Logic Code Combi -
Installation and Servicing
65 saFETy RELIEF VaLVE RENEWaL
1.
Refer to Frame 49.
2.
Drain the boiler. Refer to Frame 63.
3.
Remove the condensate trap/siphon. Refer to Frame 59.
4
. Remove expansion vessel. Refer to Frame 75.
5.
Disconnect the electrical connection from the return
thermistor.
6.
Disconnect the 22mm pipe connection at the rear of
the pump outlet.
7.
Pull off the clip retaining the pipe to the heat
exchanger swing the pipe to clear the pump and
remove pipe.
8.
Undo the safety valve union connection.
9.
Withdraw the clip securing the safety valve.
10.
Lift safety valve from boiler.
11.
Fit the new safety valve and reassemble in reverse
order ensuring the new ‘o’ ring is fitted to the top of the
return pipe.
12.
Refill boiler. Refer to Frame 30. Check operation of
boiler. Refer to Frames 38 & 39.
1.
Refer to Frame 49.
2.
Drain the heating system. Refer to Frame 63.
3.
Unscrew the pressure gauge and discard.
4.
Fit new pressure gauge, using suitable jointing
compound.
5.
Refill the boiler. Refer to Frame 30.
6.
Check operation of the boiler. Refer to Frames 38 & 39.
64 pREssURE gaUgE RENEWaL
6
7
5
8
9
10
63 DRaININg ThE BOILER
3G9690
DOMEsTIC hOT WaTER CIRCUIT
1.
Refer to Frame 50.
2.
Close all the DHW water isolating valves on the boiler inlet.
3.
To drain the DHW circuit: As there is no direct drain for the DHW circuit, depending on the location of
the boiler, opening the lowest hot water tap may drain this circuit. However it must be noted that some
residual water will be experienced during replacement of components.
4.
After replacing any component on the boiler, close tap, open the DHW isolation valve and open all system
isolating valves (re-pressurise as appropriate by re-connecting the filling loop, refer to Frame 30) before
proceeding to check operation of the boiler.
5.
Disconnect filling loop. Refer to Frame 30.
6.
Check operation of the boiler. Refer to Frames 38 & 39.
CENTRaL hEaTINg CIRCUIT
1.
Refer to Frame 49.
2.
Close all the CH water isolating valves on the boiler inlet.
3.
To drain the primary heat exchanger circuit: Open the drain valve
and attach a length of hose to the CH drain point.
4.
After replacing any component on the boiler, remove the hose,
close the drain valve and open all system isolating valves (re-
pressurise as appropriate by re-connecting the filling loop, refer
to Frame 30) before proceeding to check operation of the boiler.
5.
Disconnect filling loop. Refer to Frame 30.
6.
Check operation of the boiler. Refer to Frames 38 & 39.
3G9692d
Gas
CH
Return
Filling Loop
DHW
Inlet
DHW
Outlet
CH
Circuit
Drain
CH
Flow
s
ER
VICIN
g
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06/01/2011 09:10:42
Summary of Contents for LOGIC Code Combi 26
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