Electrical Installation; Start-Up; General Information; Preparation - Dimplex Li 12Tu Gebrauchsanweisung

7.5.2 Electrical installation

1) The supply cable for the output section of the heat pump (up
to 5-core) is fed from the electricity meter of the heat pump
via the utility blocking contactor (if required) into the heat
pump Connection of the mains cable to the control panel of
the heat pump via terminal X1: L1/L2/L3/N/PE.
An all-pole disconnecting device with a contact gap of at
least 3 mm (e.g. utility blocking contactor or power contac-
tor) and an all-pole circuit breaker with common tripping for
all external conductors must be installed in the power supply
for the heat pump (tripping current and characteristic in com-
pliance with the device information).
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).
2) The three-core supply cable for the heat pump manager
(heating controller N1) is fed into the heat pump .
Connection of the control line to the control panel of the heat
pump via terminal X2: L/N/PE.
Details on the power consumption of the heat pump are
listed on both the product information sheet and the type
plate.
The (L/N/PE~230 V, 50 Hz) supply cable for the heat pump
manager must have a constant voltage. For this reason, it
should be tapped upstream from the utility blocking contac-
tor or be connected to the household current, as important
protection functions could otherwise be lost during a utility
block.
3) The utility blocking contactor(K22) with 3 main contacts (1/3/
5 // 2/4/6) and an auxiliary contact (NO contact 13/14)
should be dimensioned according to the heat pump output
and must be supplied by the customer.
The NO contact of the utility blocking contactor (13/14) is
looped from terminal strip X3/G to connector terminal X3/A1.
CAUTION! Extra-low voltage!
4) The contactor (K20) for the immersion heater (E10) of mono
energy systems (HG2) should be dimensioned according to
the radiator output and must be supplied by the customer. It
is controlled (230 V AC) by the heat pump manager via ter-
minals X2/N and X2/K20.
5) The contactor (K21) for the flange heater (E9) in the hot
water cylinder should be dimensioned according to the radi-
ator output and must be supplied by the customer. It is con-
trolled (230 V AC) by the heat pump manager via terminals
X2/N and X2/K21.
6) The contactors mentioned above in points 3, 4 and 5 are in-
stalled in the electrical distribution system. The mains cables
for the heating elements should be dimensioned and pro-
tected according to DIN VDE 0100.
7) All cables must be installed as permanent wiring.
8) The heat circulating pump (M13) is connected to terminals
X2/N and X2/M13.
9) The DHW loading pump (M18) is connected to terminals X2/
N and X2/M18.
10) The return flow sensor is integrated into the heat pumps
and is connected to the heat pump manager via the control
line. The return flow sensor must be installed in the im-
mersion sleeve in the manifold only when a dual differen-
www.dimplex.de
tial pressureless manifold is used. The single-core wires are
then connected to terminals X3/GND and X3/ R2.1. Bridge
A-R2 (situated between X3/B2 and X3/1 when delivered)
must then be moved to terminals X3/1 and X3/2.
11) The external sensor (R1) is connected to terminals X3/GND
and X3/R1.
12) The domestic hot water sensor (R3) is included with the do-
mestic hot water cylinder and is connected to terminals X3/
GND and X3/R3.
8

Start-UP

8.1 General Information

To ensure that start-up is performed correctly, it should only be
carried out by an after-sales service technician authorised by the
manufacturer. This may be a condition for extending the guaran-
tee (see Warranty Service).

8.2 Preparation

The following items need to be checked prior to start-up:
 All of the heat pump connections must be established as de-
scribed in Chapter 6.
 All valves that could impair the proper flow of the heating
water in the heating circuit must be open.
 The air intake and air outlet paths must be clear.
 The ventilator must turn in the direction indicated by the ar-
row.
 The settings of the Heat pump manager must be adapted to
the heating system in accordance with the controller's oper-
ating instructions.
 Ensure the condensate outflow functions.
 Both the accessories pack in the switch box and that which
is located under the ventilator must be removed.

8.3 Procedure

The heat pump is started up via the heat pump manager. Adjust-
ments should be made in compliance with the instructions.
If an overflow valve is fitted to maintain the minimum heat-
ing water flow rate, the valve must be adapted to the require-
ments of the heating system. Incorrect adjustment can lead to
faulty operation and increased energy consumption. We recom-
mend carrying out the following procedure to correctly adjust the
overflow valve:
Close all of the heating circuits that may also be closed during
operation (depending on the type of heat pump usage) so that
the most unfavorable operating state - with respect to the water
flow rate - is achieved. This normally means the heating circuits
of the rooms on the south and west sides of the building. At least
one heating circuit must remain open (e.g. bathroom).
The overflow valve should be opened far enough to produce the
maximum temperature spread between the heating flow and re-
turn flow listed in the following table for the current heat source
temperature. The temperature spread should be measured as
close as possible to the heat pump. The heating element of mono
energy systems should be disconnected during start up.
452160.66.52 · FD 9205
LI 9TU - LI 12TU
EN-9