Supplied By www.heating spares.co Tel. 0161 620 6677
www.glow-worm.co.uk
9
Boiler Operation
Isolating Valves
1. Check that all isolating valves and the Gas cock, on the boiler
are open and that water flows from the hot water tap.
2. If you are in any doubt about the boiler being filled with water
contact your installer or Glow-worm's own service organisation
using the telephone number on the inside front cover of this
booklet. The boiler does not operate without water.
3. Check that the electrical supply to the boiler is ON and that all taps
are closed and there is no demand from any external controls.
4. The gauge, see diagram 3, will indicate the system pressure,
which should read at least 0.5bar (recommended 1.0bar,
max 1.5bar), if the pressure is less, then call your Installation/
Servicing company or Glow-worm service.
5. To operate or switch off the boiler follow the instructions as
described on the following pages.
6. Set any external controls as required.
Filling the Central heating system (filling loop)
Open the Central Heating (flow and return) isolation valves as
indicated on Diagram 3 and install the filling loop on its connection.
Gently open the filling loop taps until the correct pressure is indicated
by the gauge (recommended 1.0bar; min. 0.5bar; max. 1.5bar).
If the loss of pressure problem persists, you MUST contact your
Installation / Servicing company or Glow-worm Service.
Diagram 3
Isolating Valves
A Central heating - Return (open)
B Central heating - Flow (open)
C Cold water - Inlet (open)
D Gas cock - (open)
E Gauge (system pressure)
A B
C D
E
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