Roberts Gorden DAT100, DAT75, DAT90 Wiring And Electrical Information, Electrical Supply, Models

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 0-10 V DC is required with 0V giving minimum fire and a 10V giving full fire, wired in screened cable (Belden 8451 or equivalent).

All heaters and controls must be correctly earthed. All external wiring must comply with the relevant local codes. Wire specification H05VV-F.

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
DAT 75 & 90	5 A
DAT 100 & 115	10 A

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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