Gas Supply; Cold Water Mains Inlet And Hot Water Outlet - Vaillant aquaPlus Instructions For Installation And Servicing

5 Boiler Installation Sequence 5

5.7 Gas supply

• Connect the 15 mm compression gas service cock (1)
and 22 mm copper outlet tail (3) as supplied with the
appliance (2) and tighten.
• Connect a gas supply pipe of not less than 22 mm
diameter to the copper tail.
• Tighten all connections.
(Ensure the gas supply pipework is adequately sized
such that a 20 mbar gas pressure is available at the
boiler inlet at full flow rate).
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Fig. 5.6: Fitting the gas connection aquaPLUS
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Supplied by HeatingSpares247.com
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5.8 Cold water mains inlet and hot water outlet

Flush all foreign matter from the mains supply before
connecting to the boiler.
• Connect the cold water service valve (1) to the cold
inlet water connection (3) of the appliance with the
washer (2) provided and tighten.
• Connect the 15 mm cold water inlet pipe copper tail
(4) to the cold water service valve (1) and tighten.
• Connect the 15 mm hot water outlet copper tail (6) to
the hot water outlet connection of the appliance (8)
with the washer provided (7) and tighten.
Note: The hot water outlet union nut is packed in
with the PRV fitting pack.
• Connect the cold water service pipe and hot water
outlet pipework to the copper tails.
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Fig. 5.7: Fitting the hot and cold water connections aquaPLUS
Instructions for installation and servicing aquaPLUS VUI 362-7
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