HAMWORTHY HEATING LTD
13
MILBORNE
500001130/J
4.6 Electrical Supply
WARNING! THIS APPLIANCE MUST BE EARTHED IN ACCORDANCE WITH IEE
REGULATIONS
•
Boiler electrical supplies must not be switched by a time clock.
•
Boilers are suitable for 230Volt, 50Hz supply.
•
External fuses should be rated for 6 amps
•
Wiring must be completed in heat resistant cable size 1.0mm
²
csa.
•
Each boiler MUST have individual means of isolation.
•
Each boiler is supplied with a 500mm flying lead for connection to the electrical
supply.
•
Electrical isolators must facilitate complete electrical isolation.
•
Electrical isolators must have contact separation of minimum 3mm in all poles.
•
Electrical isolators must be installed in readily accessible locations.
•
Electrical supplies to boiler modules should only serve the boiler.
•
Any pump controlled by the boiler must be installed using an adequate contactor.
•
Where twin head pumps are installed a changeover control (not HHL supplied)
external to the boiler is required.
•
Where an external alarm is required, a 230v signal is provided from the boiler.
•
Time clock control should be via the boiler modules stop/start circuit (24V DC).
•
Any interlock circuit must be in series with the time control for each circuit. The
interlock circuit must never be used to isolate the boiler electrical supply.
ADDITIONAL INFORMATION REGARDING ELECTRICAL SUPPLIES IS GIVEN IN BS
EN60335, Part 1.
NOTE: The appliance must be isolated from the electrical supply if electric arc welding
is carried out on connecting pipework.
FOR TYPICAL SCHEMATIC DETAILS SEE FIGURE 4.6
FOR DETAILED WIRING INSTRUCTIONS SEE FIGURES 9.3.1 & 9.3.2
AND APPENDIX B
