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0020008877-04
7 Gas, Water and Condensate Connections
Diagram 7.2
9244
FLOW
RETURN
Heating circuit flow and return
pipes should be sized as follows.
Up to 18 kW 22mm.
over 18 kW 28mm.
Compression is the
recommended fixing
for servicing. (not supplied)
Diagram 7.1
12934
FLEXIBLE
CONDENSATE
OUTLET PIPE
GAS
SERVICE
COCK
GAS
SUPPLY
PIPE IN
GAS SERVICE
COCK SHOWN IN
OPEN POSITION
UNION CONNECTOR
SPIGOT
GAS SERVICE
COCK LINER
CONDENSATE DRAIN
CONNECTION
7.1 Gas Connection
Before connection check the supply of local gas.
The gas supply can be connected from below, see diagram 7.1.
or through the wall at the rear of the boiler.
Refer also to section 1.2 and 1.3.
The whole of the gas installation, including the meter, should be
inspected, tested for soundness and purged in accordance with
the document IGE/UP/1B.
7.2 Water Connections
Provision is made for the water connections to be made from
above the boiler, see diagram 7.2. The position is shown on the
wall template.
Flush out the domestic hot water and the heating systems
before connecting to the boiler.
7.3 Condensate Drain Connection
The condensate drain connection is at the rear of the boiler, see
diagram 7.1. A flexible condensate outlet pipe is supplied loose
in the base polystyrene packaging. The 90
0
end of the flexible
condensate outlet pipe should be used to fit onto the spigot, to
discharge condensate to a drain. The drain pipe 22mm to
25mm OD. non corrosive plastic pipe should have a fall of at
least 2.5
0
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 7.3.
It is recommended that any external condensate drain pipe is
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.
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