30
Response 80 / 100 / 120
- Installation
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.
43
COMMISSIONING AND TESTING
INSTALLATION
INST
ALLA
TION
B. GAS INSTALLATION
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.
i.e. not less than 5 times the capacity per revolution of the gas
meter mechanism.
42
EXTERNAL ELECTRICAL CONTROLS
Earths are not shown for clarity but must never be omitted.
Wiring External to the Boiler
WARNING. This appliance must be efficiently earthed.
A mains supply of 230 V ~ 50 Hz is required.
The fuse rating should be 3A.
Wiring external to the boiler MUST be in accordance with the current
I.E.E. (BS.7671) Wiring Regulations and any local regulations.
All external controls and wiring must be suitable for mains voltage.
Wiring should be 3 core PVC insulated cable, not less than 0.75 mm
2
(24
x 0.2mm).
Wiring external to the boiler MUST be in accordance with the current
wiring regulations and any local regulations.
Connection must be made in a way that allows complete isolation of the
electrical supply such as a double pole switch having a 3mm (1/8")
contact separation in both poles, or a plug and socket, serving only the
boiler and system controls. The means of isolation must be accessible
to the user after installation.
Internal Programmer
The Ideal Programmer Kit is supplied with its own instructions.
Associated controls should be wired as shown in Diagram A.
External Single Channel Programmer
This should be wired as shown in Diagram B
External Two Channel Programmer
This should be wired as shown in Diagram C. The power to the
programmer should be isolated with the same switch that isolates power
to the boiler, otherwise the boiler can be left live, even when the boiler
isolating switch is off. Using a two channel programmer will disable the
heating switch.
N.B.
These diagrams are schematic only
and do not show external terminal strips etc.
Room Thermostat
It is recommended to use a room thermostat in conjunction with the
boiler to give the most efficient boiler performance and the most
comfortable central heating performance. The room thermostat
should be wired (depending on the programmer option) as either
diagram A, B or C. The boiler will operate without a room thermostat
by using the central heating temperature control to vary the flow
temperature between 70
o
C and 82
o
C (± 5
o
C.)
Frost Thermostat
Central heating systems fitted wholly inside the house do not normally
require frost protection as the house acts as a 'storage heater' and
can normally be left at least 24 hours without frost damage.
However, if parts of the pipework run outside the house
or if the boiler will be left off for more than a day or so
then a frost thermostat should be wired into the system.
The frost thermostat should be sited in a cold place but
where it can sense heat from the system.
Wiring should be as shown.
Note. If
the boiler is installed in a garage it may be
necessary to fit a pipe thermostat, preferably on the
return pipework.
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