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3
Installation - General
3.1 PIPE FITTINGS
As all the pipes to the MegaLife are of stainless steel brazing or soldering is difficult, therefore use
22mm COMPRESSION FITTINGS when connecting to the MegaLife pipes.
"Push fit" type fittings MUST NOT BE USED for direct connection to the MegaLife pipes, however
they may be used elsewhere in the system if technically suitable.
If solder type fittings are used in the supply pipework to the MegaLife the pipework should be
thoroughly flushed to remove any flux residue.
3.2 COLD WATER SUPPLY
A 22mm cold water supply is recommended from the cold water feed cistern. No other connection
should be taken from this supply. A servicing valve or stop valve with a fixed washer plate should
be incorpoarted in a convennient and accessible position in the cold feed pipe. The cold feed pipe
should be connected to the heater connection marked INLET.
3.3 DRAIN TAP
A suitable draining tap should be installed at the lowest point of the cold feed pipe between the cold
water service valve and the heater to facilitate draining the heater.
3.4 OUTLET PIPEWORK
The outlet pipework should be connected to the heater connection marked OUTLET. The vent pipe
must be teed into the outlet pipe (see section 3.5 below). Outlets above the heater can be teed off the
vent pipe. Ideally the pipework from the heater to the outlet fittings should be in 22mm pipe with short
runs of 15mm pipe to the terminal fittings.
3.5 VENT PIPE
A vent pipe MUST be connected to the outlet of the heater.
The vent pipe must rise continuously and be arranged to discharge into the cold water feed cistern.
The vent pipe must have a minimum bore diameter of 19mm.
No valves should be fitted to the vent pipe. It is not acceptable to replace the vent pipe with a
pressure relief device.
The hot water distributing pipes can be teed off the vent pipe. If fitting a shower booster pump
particualr attention should be made to the manufacturers instructions regarding the positioning of the hot
water tapping to prevent air entrainment via the vent pipe.
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