Heating System - Glow-worm COMPACT 100p Instructions For Installation And Operation Manual

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4.1 General Notes
The boiler is intended for use in a sealed system only.
4.2 Safety Valve
The safety valve is an integral part of the boiler.
It cannot be adjusted but has a manual test device.
4.3 Pressure Gauge
A pressure gauge is incorporated into the boiler to indicate the
system pressure.
The gauge has a cold fill set pointer.
4.4 Pump
The circulation pump is integral with the boiler.
The remaining circulating pressure head available from the
boiler is shown in diagram 4.1.
4.5 Expansion Vessel
The boiler has an integral expansion vessel with a capacity of
6Litres, (1.32gall). If the system water content exceeds the
maximum quoted in Table 1, Data, an additional vessel should
be connected into the system as close as possible to the central
heating return connection of the boiler, see diagram 4.2.
The pressure shall not be less than the static head at the point
of connection, that is, the height of the top point of the system
above the expansion vessel.
4.6 Flow Rate
If required a valve can be incorporated in the main flow or return
of the system, valve "A" shown in the flow diagram 4.2. This
valve must be lockable and positioned so that inadvertent
closure or unauthorised interference is not possible.

4 Heating System

5 10
Circuit flow rate (l/min)
Dt at 60000 btu output
Dp (MH2O)
15 20
4.7 Bypass
The bypass is an integral part of the boiler and cannot be
adjusted.
No external system bypass is required.
4.8 Filling Sealed Systems
Provision for filling the system at a low level must be made.
Three methods of filling are shown in diagram 4.3.
There must be no permanent connection to the mains water
supply, even through a non-return valve.
NOTE: It is important that fittings used for connection to potable
water comply with the water undertakers requirements.
4.9 Corrosion Inhibitor
If an inhibitor is to be used in the system, contact the inhibitor
manufacturer so that they can recommend their most suitable
product.
When fitting the boiler into an existing system, special care
should be taken to drain the entire system, including radiators,
then thoroughly cleaning out before fitting the boiler whether or
not adding an inhibitor.
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Diagram 4.1
221680G