Electrical Supply - andrews 32/143 Installation Manual, Operation And Service Manual

SECTION 3 INSTALLATION
GAS SUPPLY Gas Supply Cock, Hi-Flo Models
Fig 2.
Fit the gas cock immediately upstream of the gas control valve using a suitable jointing
compound and connect to the gas supply. An inlet nipple complete with pressure test
point nipple is factory fitted to the gas control valve to avoid possible damage.
Gas Valve
Gas Cock
Nipple
BSP Thread U.P .T. Thread
Fig 2.
Where the water heater(s) is(are) installed in a boiler house or purpose built
compartment, a manually operated valve for the boiler house must be fitted in
accordance with the Gas Safety (Installation and Use) Regulations 1998. The valve must
be easily identified and readily accessible.
After installation, the system should be pressure tested for soundness and purged in
accordance with BS 6891 or IM/2 and IM/5 as appropriate.
HI-FLO MODELS - STANDARD RANGE MODELS
ELECTRICAL
SUPPLY -
External wiring to the water heater(s) must be installed in accordance with current I.E.E.
Regulations for the wiring of buildings and to any Local Regulations that may apply.
AUTO IGNITION
UNITS
The Auto Ignition Heater is designed to operate from a 220/240V, 1Phase supply.
The fuse rating is 5 amps.
The method of connection to the mains electricity supply should facilitate complete
electrical isolation of the appliance, preferably by use of an unswitched shuttered socket
outlet in conjunction with a fused three pin plug, both complying with the requirements
of BS 1363.
Alternatively, a fused double pole switch or fused spur box serving only the heater may
be used.
The point of connection to the mains electricity supply should be readily accessible and
adjacent to the appliance.
Fig 3a and 3b.
Connect the electrical supply to the main control panel terminal block via the cable
glands in the base of the control panel. Mains input cable should be 0.75mm 2 , 3 core,
and should be connected to the mains supply as detailed above.
It is recommended that screen cable is used where the volt-free contacts are to be
connected from an external supply. This will eliminate the risk of possible interference
from nearby high voltage cables.
Data sheets available for Hi-Flo and Standard Range, Automatic Ignition Control System.
Contact Andrews Water Heaters.
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