Electric Connections - Lochinvar AMICUS HT Series Installation, Commissioning And Service Manual

4.22 Electric connections

4.22.1 Power supply and electrical connections
The numbering of the terminals may change without notice. For their connection is mandatory to refer to the wiring
diagram supplied along with the unit.
4.22.2 Remote wiring connections (compulsory)
All terminals referred to in the explanations below will be found on the terminal board inside the electrical box. All electric connections
mentioned below have to be made by the installer, on site.
USER CIRCUIT WATER INLET SENSOR (BTI)
It is used to measure the return water temperature from the user circuit.
The standard working mode has the user pump switched off during stand-by periods (Com-
pressors Off). The sensor must be placed in an appropriate position in order to measure the
temperature of the secondary circuit. Incorrect positioning of the user water sensor can adver-
sley affect the operation of the heat pump. The remote sensor is supplied loose with the unit
(it is present inside the electric box) and it is supplied with a 3 mt. cable length. If this is too
short, it is possible to increase the length by using cable of diameter 0.5 mm
distance of 50 meters.
USER CIRCUIT WATER PUMP
If the pump is factory supplied and fitted (A version) it will already be connected otherwise,
connect to terminals indicated. In standard configuration, the unit microprocessor controller
switches off the user water pump when the set point is reached or if the unit is in standby. This
strategy is suitable if the unit is heating a buffer store from which a secondary circuit is taken
and provides a substantial reduction of energy use.
DOMESTIC HOT WATER SENSOR (BTS)
This is used to measure the return water temperature from the domestic hot water circuit. The
sensor must be placed in the pocket provided in the DHW (Domestic hot water) cylinder, in an
appropriate position, in order to measure the correct temperature of the domestic hot water.
(see dedicated paragraph). Incorrect positioning of the domestic hot water sensor can have an
adverse effect on the operation of the heat pump. The sensor is supplied loose with the unit (it
is placed inside the electric box) and it is supplied with a 3 mt. cable length. If this is too short,
it is possible to increase the length by using cable of diameter 0.5 mm
distance of 50 meters.
32
Input for electrical connections
Input for power supply
, up to a maximum
2
up to a maximum
2
Rev. A 11-2020