22
classic m -
Installation & Servicing
INSTALLATION
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.
2.
Purge air from the gas installation by the approved methods
only.
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.
32 COMMISSIONING AND TESTING
bk
br
bk
External switch.e.g.
room'stat, programmer
b
or
or
v
v
b
y/g
DC Gas valve
Overheat
thermostat
L
N
PCB
b
r
br
Mains Switch
DC
Fan
r
bk
y
pk
b
Flame detection electrode
y/g
r
r
r
r
Control thermistor
electrode
3
2
1
Ecl 1849
31 FUNCTIONAL FLOW WIRING DIAGRAM
LEGEND
b
- blue
bk
- black
br
- brown
r
- red
y
- yellow
w
- white
y/g
- yellow/green
gy
- grey
or
- orange
v
- violet
pk
- pink
INST
ALLA
TION
Summary of Contents for Classic m3050
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