Technical data

4.6.1 Single Phase

4.6.1.1 Single Underfloor Control Unit

In all wiring diagrams the terminals marked ‘Reverse Cycle’ change the mode from heating to cooling (If

this option is fitted). This requires a volt free relay, open is heating mode, closed cooling.

The terminals marked ‘Fault’ are to provide remote indication that a fault has occurred within the heat

pump. This is a volt free relay and the internal relay will close if a fault occurs.

Fig 14 Heat pump wiring—

Single Underfloor Manifold

230 Vac 50Hz power supply via a

Type D MCB in the buildings

distribution Board

Timeclock input.

Refer to Manufacturers Literature

Thermostat inputs.

Refer to Manufacturers Literature

Underfloor

Electric Actuator

Output

Refer to

Manufacturers

Literature

Boiler

Relay

DHW time

clock

DHW

Valve

Fault

Reverse

Cycle

Heat Pump Wiring Terminal block

Enable Signal connection is supplied with a temporary link across it . This should be

removed after commissioning and connection to the heating control system.

(Terminals 1 and 2)

Control Unit Power Supply