IDEAL istor HE260, Installation And Servicing, Page: 39 / 80

39 istor system store -
Installation and Servicing
INSTALLATION
46 FUNCTIONAL FLOW WIRING DIAGRAM
WARNING.
Whilst effecting the required gas tightness 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 tightness 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 approved methods
only.
3. Re-tighten the union and test for gas tightness.
47 COMMISSIONING AND TESTING
Dry fire thermistor
2
1
bk
or
or
Diverter
valve
r
v
v v v v
Pump
pk
br
y/g
b
y/g
RAC Gas valve
Overheat
thermostat
r
br
Mains Switch
DC
Fan
r
bk
y
pk
b
Flame detection electrode
y/g
r
r
y
y
pk
pk
b
b
r
r
DHW thermistor
CH control thermistor
CH return thermistor
electrode
ist9891
br
y/g
br
bk
N
L
E
b
External switch e.g.
room'stat.
Fost stat
PCB No.
P
HC
033
Spark generator
wh
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