Electrical Connection - Dimplex LA 60TUR+ Installation And Operating Instructions Manual

Note:
For operation of the heat pump with the four-way reversing valve,
it is essential to set up the hydraulic connections according to the
instructions included in the scope of supply of the valve. The in-
structions give a description of the precise procedure for the cor-
rect assembly of hydraulics. Non-observance of this will lead to
restrictions in the operation of the heat pump.
Important:
The notes/settings in the instructions of the heat pump manager
must always be observed and carried out accordingly; not doing
so will lead to malfunctions.
Minimum heating water flow
The minimum heating water flow rate through the heat pump
must be assured in all operating states of the heating system.
This can be accomplished, for example, by installing either a dual
differential pressureless manifold or an overflow valve. The pro-
cedure for setting an overflow valve is described in the chapter
"Start-up". When the minimum heating water flow rate is under-
shot, the plate heat exchanger in the refrigeration circuit can
freeze, which can lead to total loss of the heat pump.
The nominal flow rate is specified depending on the max. flow
temperature in the device information and must be taken into ac-
count during planning. With design temperatures below 30 C in
the flow, the design must be based on the max. volume flow with
5 K spread for A7/W35.
The specified nominal flow rate (See "Device information" on
page 10) must be guaranteed in every operating status. An in-
stalled flow rate switch is used only for switching off the heat
pump in the event of an unusual and abrupt drop in the heating
water flow rate and not to monitor and safeguard the nominal
flow rate.
Antifreeze
Heat pump systems, which cannot be guaranteed to be frost-
free, should be equipped with a drainage option (see Fig.). The
antifreeze function of the heat pump manager is active whenever
the heat pump manager and the heat circulating pump are ready
for operation. The system has to be drained if the heat pump is
taken out of service or in the event of a power failure. The heating
circuit should be operated with a suitable antifreeze if heat pump
systems are implemented in buildings where a power failure can-
not be detected (holiday home).
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7.3 Electrical connection

A standard five-core cable is used for connecting the heat pump
to the power supply.
The cable must be provided by the customer. The conductor
cross section is selected in accordance with the power consump-
tion of the heat pump (see appendix Device information) and the
applicable VDE (EN) and VNB regulations.
An all-pole disconnecting device with a contact gap of at least
3 mm (e.g. utility blocking contactor or power contactor) as well
as a 3-pole circuit breaker with common tripping for all external
conductors must be installed in the power supply (tripping current
in compliance with the device information). When installing fault
current protection, the correct version (RCD type B) must be
used for DC components, which could be created by electronic
equipment, for example.
The relevant components in the heat pump contain an internal
overload protection.
When connecting, ensure that the incoming supply has a clock-
wise rotating field.
Phase sequence: L1, L2, L3.
ATTENTION!
Ensure that there is a clockwise rotating field: With incorrect wiring the
starting of the heat pump is prevented. A corresponding warning is
indicated on the display of the heat pump manager (adjust wiring).
The control voltage is supplied via the heat pump manager.
The heat pump manager has a 230 V AC-50 Hz power supply
and is connected in compliance with its own operating instruc-
tions.
ATTENTION!
The control cable is essential for the operation of air-to-water heat pumps
for outdoor installation. The control cable and mains cable are to be
routed separately. It is not permissible for the customer to extend the
control cable.
Three separate lines are used as control lines. (These are not in-
cluded in the scope of supply of the heat pump). Two of these ca-
bles are equipped with rectangular plug connectors which must
be connected to the heat pump manager and to the underside of
the switch box. One of these two cables is for the 230 V voltage
level, the other for the extra-low voltage level. The third cable
serves as a communication connection between the heat pump
manager and the electronic expansion valve (N23), and must be
connected to the "field card" on the heat pump manager and to
the expansion valve driver (N23/Network) in the switch box of the
heat pump.
The control lines (not included in the scope of supply) have rec-
tangular plug connectors on both ends. One end is connected to
the heat pump manager, and the other end is connected to the
switch box in the heat pump. The plug connections to the heat
pump are located on the bottom of the switch box.
Two separate lines are used as control lines. One of the lines is
designed for the 230 V control voltage level, the other for the sig-
nal and/or extra-low voltage level.
More detailed information can be found in the operating instruc-
tions of the heat pump manager.
For detailed information, see circuit diagrams in the appendix.
452163.66.40 · FD 9512
LA 60TUR+
EN-7