Dimplex LAC 12TR, Installation And Operating Instructions Manual

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7.3
6 Mounting
6.1 General
The following connections need to be established on the heat
pump:
„ supply/return lines of the heating system
„ condensate drain
„ control lead to the remote control
„ power supply
6.2 Heating-Side Connection
The connections on the heating side of the heat pump are pro-
vided with 1" external thread (flat sealing). When making the con-
nections to the heat pump, use a wrench to counterhold at the
transitions.
Before completing the heat pump connections on the heating
water side, the heating installation must be flushed in order to re-
move any impurities that may be present, as well as any residues
of sealing material, and the like. Any accumulation of deposits in
the condenser may result in a total failure of the heat pump. On
systems equipped with heating water flow shut-off devices such
as radiator or thermostat valves, an overflow valve, to be pro-
vided by the customer, needs to be installed at the outlet of the
heat pump in a heating system bypass. This assures a minimum
heating water flow through the heat pump and thus prevents any
malfunctions from occurring.
Once the installation on the heating side has been completed,
the heating system must be filled, de-aerated and pressure-
tested.
Heating water minimum flow rate
The heating water minimum 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 a differential
pressure-free manifold or an overflow valve. The procedure for
setting an overflow valve is described in the Chapter Commis-
sioning.
Frost Protection
On heat pumps installed in a location prone to frost, a manual
drain valve (see “Hydraulic Block Diagrams” in the Appendix)
should be provided. Properly installed appliances feature an in-
ternal frost protection feature. If the heat pump is taken out of
service or in the event of a power failure, the system must be
drained. In heat pump installations where a power failure cannot
be readily detected (e.g. holiday houses), the heating circuit must
contain a suitable antifreeze product.
6.3 Electrical Connection
The power connection of the heat pump is effected via a stand-
ard 5-core cable.
The cable has to be supplied by the client; the cross-sectional
area is to be selected in accordance with the power consumption
of the heat pump (see Equipment Data in the appendix) as well
as all relevant VDE (EN) and VNB regulations.
An all-pole isolating switch with at least 3 mm clearance on each
pole (e.g. utility company shut-off contactor, power contactor) as
well as a 3-pole circuit breaker with simultaneous tripping of all
external conductors (tripping current as stated in the Equipment
Data) must be provided in the electrical supply circuit of the heat
pump.
„ optionally, an additional three-core cable is required for the
domestic hot water supply.
When connecting multiphase units the clockwise phase se-
quence of the motor electrical supply must be assured.
Phase sequence: L1, L2, L3.
ATTENTION!
Clockwise phase sequence must be ensured: Operating the compressor
in the wrong sense of rotation, may result in damage to the compressor.
An incorrect phase sequence causes the fan to operate in the wrong
sense of rotation leading to a significant reduction in performance.
The control voltage for the remote control is provided by the
power supply of the unit.
The connecting lead (control lead) from the remote control to the
heat pump (not included in the scope of delivery) must be suita-
ble for 230 V mains power supply. The lead must have (at least)
6 cores and the cross-section of the single cores must be at least
0.5 mm².
The power supply of the heat pump must be as specified in the
Technical Data of the applicance, i.e. 3-L/N/PE 400 V.
The connection inside the heat pump is to be effected using the
terminal strips in the control box. Detailed information on the
electrical connection can be found in the circuit diagram in the
appendix.
7 Commissioning
7.1 General
To ensure proper commissioning it should be carried out by an
after-sales service authorized by the manufacturer. This will lead,
under certain circumstances, to an extension of the warranty pe-
riod (cf. Warranty).
7.2 Preparatory Steps
Prior to commissioning, the following items need to be checked:
„ All connections of the heat pump must have been made as
described in Chapter 6.
„ In the heating circuit all valves that could impair the proper
heating water flow must be open.
„ The air intake/discharge path must be unobstructed.
„ The sense of rotation of the fan must correspond to the di-
rection of the arrow.
„ An operating mode must have been set on the remote con-
trol.
„ Proper condensate drainage must be ensured.
7.3 Procedure
The start-up of the heat pump is effected via the remote control.
Where an overflow valve is fitted to assure the minimum heating
water flow rate, the valve must be set in accordance with the spe-
cific requirements of the heating installation. An incorrect setting
may result in various error symptoms and an increased electric
power consumption. To correctly set the overflow valve, the fol-
lowing procedure is recommended for the “heating mode”: