Glow-worm EnergySaverCombi 100 - Manual (Page 18)

18 221854B
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
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.
To ease future servicing it is advisable to use a compression
type fitting to extend the discharge pipe.
9.4 Condensate Drain Connection
The condensate drain connection is at the bottom of the boiler,
to the left of the wall mounting jig, see diagram 9.1. 21.5mm
plastic overflow pipe should be used to fit into the drain connection
on the condensate siphon and discharge condensate to a drain.
The drain pipe should have a fall of a 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
insulated and also preferably of 32mm diameter, to prevent
freezing in adverse weather conditions.
The condensate is discharged periodically in ‘slugs’ by siphonic
action.
Diagram 9.1
9057
CAP
CONDENSATE
SIPHON
DRAIN
CONNECTION
DRAIN PIPE
9 Gas, Water, and Condensate Connections
10.1 Supply Cable Connection
This appliance must be earthed.
It is essential that the polarity is correct.
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 white 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.
10 Electrical Connections
It is recommended that the condense siphon 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.