Glow-worm Energysaver Combi 80-100 - Manual (Page 18)

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Make sure that the drain points on the isolating valves are
positioning towards the front of the boiler, also that the drain and
operating screw heads are accessible.
9.3 Safety Valve Discharge
WARNING: The pipe from the safety valve must not discharge
above an entrance, window or any type of public access area.
A short discharge pipe is supplied loose in the wall mounting
pack. This must be extended, using not less than 15mm o.d.
pipe, to discharge, in a visible position, outside the building,
facing downwards, preferably over a drain.
The pipe must have a continuous fall and be routed to a position
so that any discharge of water, possibly boiling, or steam cannot
create any danger to persons, damage to property or external
electrical components and wiring.
NOTE: To ease future servicing it is advisable to use a
compression type fitting to extend the discharge pipe.
9.4 Condensate Connection
The condensate connection is at the bottom of the boiler to the
left hand side of the wall mounting jig, see diagram 9.1.
The condensate discharge pipe should have a fall of at least 2.5 o
away from the boiler.
Condensate should, if possible be discharged into the household
internal drainage system. If this is not practicable, discharge
can be allowed into the external household drains or a purpose
designed soak away.
It is recommended that any external condensate drain pipe is at
least insulated and also preferably of larger diameter, to prevent
freezing in adverse weather conditions.
The condensate is discharged periodically in ‘slugs’ by siphonic
action.
Diagram 9.1
5238
CAP
CONDENSATE
DRAIN
SPIGOT
OVER FLOW PIPE
9 Gas, Water, and Condensate Connections
10.1 Supply Cable Connection
THIS APPLIANCE MUST BE EARTHED.
CAUTION: To prevent an induced current from switching the
central heating on, when not required, it is important that the
heating system control cables are separated from the other
mains supply cables.
The boiler requires a permanent mains supply through an
isolator, see section 1.4.
Any heating system controls must not interrupt the permanent
mains electrical supply to the boiler.
Unscrew the mains electrical supply cover plate, situated on the
left hand side of the wall mounting jig, see diagram 10.1.
Remove the mains electrical connector socket from the fittings
pack and push on to the bracket on the left hand side of the wall
mounting jig with the socket pins pointing upwards. Remove the
two securing screws and cover from the socket. Using PVC
cable of suitable length and rating as stated in section 1.4,
connect the mains supply cable to the appropriate terminals of
the plug, see diagram 10.2.
Standard colours are, Brown - Live; Blue - Neutral; Green and
Yellow - Earth.
The electrical mains supply cable outer insulation must not be
cut back external to the connector.
Make the earth cable of a greater length so that if the cable is
strained the earth would be the last to become disconnected.
CAUTION: It is essential that the polarity is correct.
10 Electrical Connections
It is recommended that the condense drain is prefilled by
pouring 250ml (
1 /
2
pt) of water into the boiler flue outlet pipe
prior to commissioning, see diagram 7.4.
It is not necessary to provide air breaks or extra traps in the
discharge pipe as there is already a trap inside the boiler. Fitting
an extra trap may cause the boiler siphon to work incorrectly.
Refer to British Gas publication “Guidance notes for the
Installation of Domestic Condensing Boilers” for advice on the
disposal of the boiler condensate.