SECTION 10: WIRING AND ELECTRICAL INFORMATION
SECTION 10: WIRING AND ELECTRICAL INFORMATION
DANGER
Electrical Shock Hazard
Disconnect electric before service.
Heater must be properly grounded.
Failure to follow these instructions can result in death or electrical shock.
10.1 Electrical Supply
All heaters need a constant 230 V 50 Hz single phase supply connected to terminals L, N & Earth. Polarity "L & N" must be correct. The voltage between neutral and earth should be 0 and never exceed 15 volts.
All heaters and controls must be correctly earthed. All external wiring must comply with the relevant local codes. Wire specification
External controls must have the same constant 230 V 50 Hz supply.
An isolator with a contact separation of at least
3 mm on all poles must be installed adjacent to, but not attached to, the heater to disconnect all supplies to the heater and any remote control. This switch should be fused to 5 A.
The final connection to the heater should be made by flexible cable or conduit to the 7 pole plug on the inside of the heater using 1 mm2 cable on all models.
10.2 Remote Controls
The heater is designed to be operated by controls installed remote from the heater. See Page 20, Section 10.3.
10.2.1 Burner Controls (Thermostat)
Controls to operate the burner must be connected between L1 and T2.
10.2.2Positioning Room Thermostats or ROBERTS GORDON® Control
10.2.3 Remote Frost Thermostat
When required, connect to L1 and T2 parallel to the room thermostat.
Locate within the heated space adjacent to the most vulnerable equipment that requires protection.
See Page 20, Section 10.3.
10.2.4 Remote Fan Controls
The fan will operate automatically providing there is a constant 230 V supply to the main terminals.
A switch or control wired between terminals Y & T1 in the terminal block will allow external control of the fan(s).
The fan may be controlled to operate continuously from an external control, with the burner cycling on and off, providing that the fan
A room thermostat or ROBERTS GORDON® control should be mounted on a wall or column at a height of approximately 1.5 metres from the floor to measure the ambient temperature. It should be clear of both cold draughts and the direct path of warm air from the heater.
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