Functional Flow Wiring Diagram; Commissioning And Testing - IDEAL istor HE260 Installation And Servicing

46 FUNCTIONAL FLOW WIRING DIAGRAM

Mains Switch
2
1
DC
Fan
Flame detection electrode
r
electrode
Dry fire thermistor
DHW thermistor
CH return thermistor
CH control thermistor
LEGEND
b - blue
bk - black
br - brown

47 COMMISSIONING AND TESTING

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.
WARNING.
istor system store -
Installation and Servicing
INSTALLATION
r
br
r
bk
y
pk
b
r
y/g
Spark generator
y
y
b
b
pk
pk
r
r
ist9891
r - red
y - yellow
w - white
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.
wh
PCB No.
P 033
HC
v v v v
y/g - yellow/green
gy - grey
or - orange
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.
b
br
bk
External switch e.g.
room'stat.
or
or
Overheat
thermostat
RAC Gas valve
y/g
bk
b
pk
y/g
br
Diverter
v
valve
r
v - violet
pk - pink
N
L
br
E
y/g
Fost stat
Pump
39