34
INSTALLATION
isar - Installation and Servicing
Dry fire thermistor
nm8949
Diverter
Valve
41
FUNCTIONAL FLOW WIRING DIAGRAM
WARNING. Whilst effecting the required gas soundness test and purging air from the gas installation,
open all windows and doors, extinguish naked lights and DO NOT SMOKE.
A. Electrical Installation
1. Checks to ensure electrical safety should be carried out by
a competent person.
2. ALWAYS carry out the preliminary electrical system checks,
i.e. earth continuity, polarity, resistance to earth and short
circuit, using a suitable test meter.
B. Gas Installation
1. The whole of the gas installation, including the meter,
should be inspected and tested for soundness and purged
in accordance with the recommendations of BS. 6891.
In IE refer to IS.813:2002.
2. Purge air from the gas installation by the approved
methods only.
42
COMMISSIONING AND TESTING
LEGEND
b-blue
bk - black
br - brown
gy - grey
or - orange
pk - pink
r-red
v-violet
w-white
y-yellow
y/g - yellow/green
INSTALLATION
203319-3.pmd 27/03/2008, 08:1534
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