DUALAIR® HEATING AND COOLING UNITS INSTALLATION OPERATION AND SERVICE MANUAL
SECTION 10: WIRING AND ELECTRICAL INFORMATION
10.1 Electrical Supply
All heater models need a constant 400 V 50 Hz 3 ø supply connected to terminals L1,L2, L3, N & Earth. Polarity "L1 & N" must be correct. The voltage between neutral and earth should be 0 and never exceed 15 volts.
cooling temperature control. See Page 20, Section 10.6.
To operate the modulating gas burner, a further input of
All heaters and controls must be correctly earthed. All external wiring must comply with the relevant local codes. Wire specification
External controls must have a constant 230 V 50 Hz 1 Ø 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 DualAir® unit to disconnect all supplies to the heater and any remote control.
The final connection to the heater should be made by flexible cable or conduit to the main terminal block in the control section using 1 mm2 cable on all models.
All cables entering through the top of the heater should be routed via the metal shield to prevent inadvertent contact with the flue.
10.2.1 Remote Frost Thermostat
When required, connect to terminals 2 and 3 in the main terminal block.
Locate within the heated space adjacent to the most vulnerable equipment that requires protection.
See Page 17, Section 10.3 through Page 18, Section 10.4.
10.2.2Remote Fan Controls The fan will operate automatically.
A switch or control wired between terminals 2 & 1 in the terminal block will allow external control of the fan(s).
The fan may be operated continuously from an external control, with the burner/cooling cycling on and off.
Models | Fuse Size |
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DAT 75 & 90 | 5 A |
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DAT 100 & 115 | 10 A |
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WARNING
Electrical Shock Hazard
Disconnect electrical power before servicing.
Failure to follow these instructions can result in death or electrical shock.
10.2 Remote Control
Roberts Gordon markets a dedicated DualAir® control that will operate all the available features of the unit.
The DualAir® unit requires a 230 V remote control to provide a time control and multistage heating/
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