Connecting An Electronically Regulated Circulating Pump; Commissioning; General; Preparation - Dimplex Siw 6 Mu Gebrauchsanweisung

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 terminal X3/A1.
CAUTION! Extra-low voltage! The contactor is installed in
the electrical distribution system. The mains cable for the
installed pipe heater must be laid and secured in
accordance with the valid standards and regulations.
4) All installed electric cables must have permanent wiring.
5) The external sensor (R1) is connected to terminals X3/GND
(ground) and X3/R1.
7.6.3 Connecting an electronically
regulated circulating pump
Electronically regulated circulating pumps have high starting cur-
rents, which may shorten the service life of the heat pump man-
ager. For this reason, a coupling relay is installed or must be in-
stalled between the output of the heat pump manager and the
electronically regulated circulating pump. This is not necessary if
the permissible operating current of 2 A and a maximum starting
current of 12 A are not exceeded in the electronically regulated
circulating pump or if express approval has been issued by the
pump manufacturer.
ATTENTION!
It is not permitted to connect more than one electronically regulated
circulating pump via a relay output.
8

Commissioning

8.1 General

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 must be checked prior to start-up:
 All of the heat pump connections must be installed as de-
scribed in chapter 7.
 The heat source system and the heating circuit must have
been filled and checked.
 Dirt traps and breathers must be inserted in the brine inlet of
the heat pump.
 All valves that could impair proper flow in the brine and heat-
ing circuits must be open.
 The heat pump manager must have been parametered for
the relevant hydraulics in accordance with its operating
instructions.
www.dimplex.de

8.3 Start-up procedure

The heat pump is started up via the heat pump manager.
ATTENTION!
The heat pump must be started up in accordance with the installation and
operating instructions of the heat pump manager.
The overflow valve must be adjusted to the requirements of the
respective heating system. Incorrect adjustment can lead to
faulty operation and increased energy consumption. We recom-
mend carrying out the following procedure to set the overflow
valve correctly:
Close all of the heating circuits that may also be closed during
operation so that the most unfavourable operating state - with re-
spect to the water flow - 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. bath-
room).
The overflow valve should be opened far enough to produce the
maximum temperature spread between the heat flow and heat
return 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.
Heat source
temperature
of
-5° C
1° C
6° C
10° C
15° C
21° C
9

Cleaning / maintenance

9.1 Maintenance
To prevent faults due to sediment in the heat exchangers, care
must be taken to ensure that no impurities can enter either the
heat source system or the heating system. In the event that op-
erating malfunctions due to contamination occur nevertheless,
the system should be cleaned as described below.
452236.66.02 · FD 9303
SIW 6MU - SIW 11MU
Max. temperature spread
between heating flow and return
flow
to
0° C 10 K
5° C 11 K
9° C 12 K
14° C 13 K
20° C 14 K
25° C 15 K
EN-11