28
4000122704-1
17 Routine Cleaning and Inspection
Diagram 17.3
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Diagram 17.4
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Note: Isolating cocks water and gas are shown in the: OFF position
Diagram 17.2
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To Drain the Domestic hot water circuit (F30E Only)
• Close boiler isolating valve (c).
• Turn on one or more hot water taps.
To Drain the boiler
• Close isolating screws on the isolating valves (b), (c) and (d) turn from vertical
to horizontal to close.
• Open the boiler drain valve (a).
• (F30E Only) Turn on one or more hot water taps.
(a)
(b)
(c)
(d)
HEATING
RETURN
COLD WATER
IN (F30E Only)
HEATING
FLOW
BOILER DRAIN VALVE
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F30E shown
F30E shown
➜
DOMESTIC HOT
WATER OUT
(F30E Only)
➜
GAS SERVICE
COCK
