Commissioning; Preliminary Electrical Checks; Gas Supply; Water Supply - Vaillant TURBOmax VUW 242 E Instructions For Installation And Servicing

5. Commissioning

5.1 Preliminary electrical checks

Check the electrical installation by
carrying out short circuit, earth
continuity and resistance to earth tests
and a check for correct polarity.

5.2 Gas supply

The complete gas installation
including the gas meter must be
inspected, tested for soundness and
purged in accordance with BS 6891.
The gas supply to the boiler can be
purged by slackening the gas service
valve beneath the boiler (1, fig. 31).
Ensure that there is adequate
ventilation, extinguish naked flames
and do not smoke whilst purging.
After purging, the gas service valve
connection must be re-tightened and
tested for soundness.
(The boiler itself does not require
purging as this will be done by the
automatic burner sequence control).

5.3 Water supply

Open all domestic hot water taps
supplied by the boiler, turn on the
mains water supply to the boiler and
open the mains water isolating valve
below the boiler (2, fig. 31).
Water will now flow through the
boiler to the hot taps. Starting with the
lowest tap supplied, turn the hot taps
fig. 31
off one at a time until the hot water
pipework is purged of air.
Check all hot and cold pipework for
leaks.
22
Supplied By www.heating spares.co Tel. 0161 620 6677