Glow-worm 23c - Manual (Page 23)

23 2000225000B
15 Routine Cleaning and Inspection
Diagram 15.3
9976
Diagram 15.4
9977
Diagram 15.2
9836
(b)
(c)
(d)
HEATING
RETURN
COLD
WATER IN
HEATING
FLOW Note: Isolating cocks water and gas
are shown in the: OFF position
To Drain the Domestic hot water circuit
• 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). • Turn on one or more hot water taps.
(a)
BOILER DRAIN VALVE
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