Quick Reference Guide - Page 16
Electrical connection for external booster heater
CAUTION
The maximum current available from the booster heater output is 1 A. Do not connect the booster heater directly to Terminal Block 05 on the Hydro Unit. The AC230 V 1 A output from the Hydro Unit must only be used to energize an external contactor (Supplied locally).
•The booster heater can be installed only for room heating and cannot be used for hot water supply.
•Install the booster heater downstream of the
•The booster heater is an external heater, supplied locally, used to assist the Hydro Unit during low ambient conditions.
•The output from the Hydro Unit is only enabled when the outdoor air temperature is less than - 20°C.
•Ensure the external booster heater is installed and set up in accordance with all Local, National and International regulations.
•Connect the coil, of the field supplied contactor, to terminals 5 & 6 on Terminal Block 05. The contactor will energize in the event of low ambient conditions.
•A separate dedicated electrical supply must be used for the external booster heater. This must be connected through the contacts on the field supplied contactor (see diagram below):-
Electrical connection for external additional pump (P2)
CAUTION
The maximum current available from the additional pump output is 1 A. Do not connect the additional pump directly to Terminal Block 05 on the Hydro Unit. The AC230 V 1 A output from the Hydro Unit must only be used to energize an external contactor (Supplied locally).
•The Hydro Unit has the facility to connect an additional circulating pump, if required, into the heating or cooling system.
•Install the external pump so that its motive power does not affect the internal pump.
•The output for the pump is synchronized with the operation of the main circulating pump (P1) inside the Hydro Unit.
•Connect the coil, of the field supply contactor, to terminals 1 & 2 on Terminal Block 05.
•A separate dedicated electrical supply must be used for the additional pump. This must be connected through the contacts on the field supplied contactor (see diagram below):-
