Glow-worm Ultracom cxi User Manual download pdf (Page 18)

SAFETY

DISCHARGE

VALVE

VIEW ON UNDERSIDE OF BOILER

UNION NUT

AND SEAL

9 Safety Discharge Valve & Condensate Connections

Diagram 9.1

13644

Diagram 9.2

9.1 Safety Discharge Valve

Take the safety discharge pipe, supplied in the pipe pack and

the union nut and seal, supplied in the loose items pack and

t as shown in diagram 9.1.

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.

To ease future servicing it is advisable to use a compression

type tting to extend the safety discharge valve tube.

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.

9.2 Condensate Trap and Siphonic Drain

Connection

A exible condensate outlet pipe is tted and should be used

to couple the condensate trap and siphonic drain to a 22mm

to 25mm O.D. non corrosive plastic pipe (overow pipe), see

diagram 9.2.

IMPORTANT: Please remove the bung from the exible pipe

before tting to a drain outlet pipe.

NOTE: the pipe should have a fall of a least 2.5

44mm/metre

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 9.3.

It is recommended that any external condensate drain pipe is

protected 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.

13645

FLEXIBLE

CONDENSATE

OUTLET PIPE

CONDENSATE

TRAP AND

SYPHONIC DRAIN

VIEW ON UNDERSIDE OF BOILER

FLEXIBLE

CONDENSATE

OUTLET PIPE

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Glow-worm Ultracom cxi User Manual Page 18

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