HAMWORTHY HEATING LTD
10
PUREWELL
Vari
Heat he
500001170/K
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 10 amps
•
Wiring must be completed in heat resistant cable size 1.0mm
²
csa.
•
Each module should have individual means of isolation.
•
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.
•
Where volt free contacts are used, these too must be individually isolatable.
•
Time clock control should be via the boiler modules Remote On/Off circuit (30V DC).
Any circuit connected to the Remote On/Off MUST be volt free
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 DETAILED WIRING INSTRUCTIONS SEE SECTIONS 5.3, 9.0 & APPENDIX B
Figure 4.6 - Electrical Connections