Glow-worm cxi and Gas Valve - Manual (Page 22)

22 0020013349-02
8.1 Safety Discharge Valve
The pipe from the safety discharge valve must not discharge
above an entrance, window or any type of public access area.
Take the short safety discharge tube, union nut and seal,
supplied loose in the boiler fittings pack and fit as shown in
diagram 8.1
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 safety discharge valve tube.
8.2 Condensate Drain Connection
The condensate drain connection is behind the pump at the rear
of the boiler, see diagram 8.2. A flexible condensate outlet pipe
is supplied loose in the base polystyrene packaging and should
be used to fit on to the drain connection, if required, to 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, refer to diagram 8.3.
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.
It is not necessary to provide air breaks or extra traps in the
discharge pipe as there is already a 75mm high trap inside the
boiler. Fitting an extra trap may cause the boiler siphon to work
incorrectly.
Refer to BS5546 or BS6798 for advice on disposal of boiler
condensate.
Diagram 8.2
12761
CONDENSATE
TRAP
CONDENSATE
DRAIN
CONNECTOR
Diagram 8.1
SAFETY
DISCHARGE
VALVE
11694
8 Safety Discharge Valve and Condensate Connections
SAFETY
DISCHARGE
VALVE TUBE
UNION NUT
Tighten half turn
past finger tight