Electrical Wiring - andrews WHX42 Installation Manual, Operation And Maintenance Manual

10.

Electrical Wiring

Do not connect electrical power to the unit until all electrical wiring has been completed.
i) "A means of disconnection from the supply mains having a contact separation in all poles must be pro-
vided to allow for full disconnection".
ii) Under voltage Cat III conditions should be incorporated in the fixed wiring in accordance with the wiring
regulations.
iii) "If the supply cord is damaged, it must be replaced by the manufacturer or its service agent".
This appliance must be electrically grounded in accordance with Electrical Authority Regulations.
External wiring must be correctly earthed, polarised and in accordance with the relevant standards.
In GB this is BS 6891.
In IE this is the current edition of I.S.813 "Domestic Gas Installations".
The boiler must be connected to a permanent 230 V ac, 50Hz supply.
Connection of the whole electrical system of the boiler, including any heating controls, to the electrical supply
must be through one common isolator and must be fused 10 Amp maximum.
Isolation should be by a double pole switched fused spur box, with a minimum gap of 3 mm for both poles.
The fused spur box should be readily accessible and preferably adjacent to the appliance. It should be
identified as to its use.
Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper
and dangerous operation.
Verify proper operation after servicing.
Field wiring to be performed at time of appliance installation.
Caution
• The electrical supply required by the water
heater is 230V AC at 50 Hz.
The power consumption may be up to 135W.
Use an appropriate circuit.
• Do not disconnect the power supply when not
in use. When the power is off, the freeze
prevention in the water heater will not acti-
vate, resulting in possible freezing damage.
Ground
• To prevent an electric shock, always plug power
lead into an earth powerpoint.
10
Do not turn on the power until the electrical wiring is finished.
This may cause electrical shock or damage to the equipment to occur.
Consult a qualified electrician
for the electrical work.
• Do not let the power cord contact the gas piping.
Tie the redundant power cord outside the
water heater. Putting the redundant length of
cord inside the water heater may cause elec-
trical interference and faulty operation.
THE APPLIANCE MUST BE EARTHED