E) (d) (a), B) (c), 17 routine cleaning and inspection – Glow-worm 30ci Plus User Manual
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17 Routine Cleaning and Inspection
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Diagram 17.3
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Diagram 17.4
Note: Isolating cocks water and gas are shown in the: OFF position
Diagram 17.2
11927
(f)
BOILER DRAIN VALVE
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(e)
(d)
(a)
HEATING
RETURN
COLD
WATER IN
HEATING
FLOW
DOMESTIC HOT
WATER OUT
GAS SERVICE
COCK
To Drain the Domestic hot water circuit
• Close boiler isolating valve (d).
• Turn on one or more hot water taps.
To Drain the boiler
• Close isolating isolating valves (e) and (a).
• Open the boiler drain valve (f).
(b)
(c)
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