Frost Protection; Electrical Connection - Dimplex LA 33TBS Instructions D'installation Et D'utilisation

English
Minimum heating water flow rate
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 12.) must be assured in all operating states. An installed
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.

Frost protection

Heat pump systems, which cannot be guaranteed to be frostfree,
should be equipped with a drainage option (see Fig.). The frost
protection function of the heat pump manager is active whenever
the heat pump manager and the heat circulating pump are ready
for operation. If the heat pump is taken out of service or in the
event of a power failure, the system has to be drained, and if re-
quired, blown out, at three locations (see illustration). The heat-
ing circuit should be operated with a suitable antifreeze if heat
pump systems are implemented in buildings where a power fail-
ure can not be detected (holiday home).
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EN-8
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452166.66.05 · FD 9803

6.3 Electrical connection

6.3.1 General
All electrical installation work must be carried out by a trained
electrician or a specialist for the specified tasks in accordance
with the
 installation and operating instructions,
 country-specific installation regulations (e.g. VDE 0100),
 technical connection conditions of the energy suppliers and
supply grid operators (e.g. TAB) and
 local conditions.
To ensure that the frost protection function of the heat pump
works properly, the heat pump manager must remain connected
to the power supply and the flow must be maintained through the
heat pump at all times.
All supply lines on the heat pump must be fed through the desig-
nated free cable glands provided into the switch box. The lines
must be firmly screwed to their glands (vapour sealed pipe un-
ion).
6.3.2 Electrical installation work
ATTENTION!
Work outdoors on electrical equipment or live components may only be
carried out in dry weather conditions. In wet conditions (rain, snow etc.),
the device must be closed correctly.
3 lines/cables must be routed to the heat pump in total:
 A standard 5-core cable is used to connect the heat pump to
the power supply.
The cable must be provided on-site. The conductor cross
section is selected in accordance with the power consump-
tion of the heat pump (see attachment Device Information)
and the applicable VDE (EN) and VNB regulations and
routed accordingly. An all-pole disconnecting device with a
contact gap of at least 3 mm (e.g. utility blocking contactor or
power contactor) must be installed in the heat pump power
supply.
A 3-pole circuit breaker with joint tripping of all outer conduc-
tors (trip current in accordance with device information) pro-
vides the short circuit protection taking into account the lay-
out of the internal wiring.
These switching equipment components must be installed
outside the safety zone (tripping current according to device
information)
The relevant components in the heat pump contain an inter-
nal overload protection.
When connecting, ensure that the incoming supply has a
clockwise 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
(controller -N1).
A 3-pole line must be laid for this in accordance with the
electrical documentation. Further information on the wiring
of the heat pump manager is available in the heat pump
manager operating instructions.
LA 33TBS
www.dimplex.de