Frost Protection; Commissioning; General Information; Preparation - Dimplex Sih 90Tu Montage- Und Gebrauchsanweisungen

SIH 90TU
7.6.3 Connection of electronically
regulated circulating pumps
Electronically regulated circulating pumps have high starting
currents, which may shorten the service life of the heat pump
manager. For this reason, a coupling relay is installed or must be
installed between the output of the heat pump manager and
the electronically regulated circulating pump. This is not neces-
sary 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 is-
sued by the pump manufacturer.
CAUTION!
It is not permitted to connect more than one electronically
regulated circulating pump via a relay output.
7.6.4 Circulating pump connection with
high performance
In many cases, the supply voltage of the pump is stuck on con-
tinuous current when using larger electronically controlled cir-
culating pumps (the manufacturer's information on the pump
being used should be taken into consideration). The pump is
then generally actuated using the Start/Stop input. This input is
operated with extra low voltage from the pump (a link cable is
usually inserted in the factory default of the pump). In order to
be able to actuate the input, a coupling relay with a floating
contact is required. This must be controlled with the pump
function of a 230 V relay output of the controller. Due to the
extra low voltage to be switched, a suitable relay with the ap-
propriate contact material (gilded) must be selected and inte-
grated on-site.

7.6.5 Frost protection

Regardless of the settings for the heat circulating pumps, they
always run in heating and frost protection mode. In systems
with multiple heating circuits, the 2nd and 3rd heat circulating
pump has the same function.
CAUTION!
To ensure that the frost protection function on the heat pump
works properly, the heat pump manager must remain
connected to the power supply and flow must be maintained
through the heat pump at all times.
CAUTION!
The primary pump (M11 – responsible for the heat source flow
rate) and the secondary pump (M16 – responsible for the
warm/cold water flow rate) must always be clamped to the
heat pump manager in all cases. This is the only way to ensure
the pump flows and returns necessary for operation and to
ensure that the necessary safety measures are in place.
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8

Commissioning

8.1 General Information

To ensure that commissioning is performed correctly, it should
only be carried out by an after-sales service technician author-
ised by the manufacturer. This may be a condition for an addi-
tional guarantee (see warranty service).

8.2 Preparation

The following items must be checked prior to commissioning:
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.
The dirt trap must be inserted in the brine inlet of the heat

pump.
All valves that could impair proper flow in the brine and

heating circuits must be open.
 The heat pump manager must be adapted to the heating
system in accordance with the controller's operating in-
structions.
The hydraulic network must be flushed correctly before in-

stalling the heat pump. This includes the supply line to the
heat pump. Only when flushing is complete can the heat
pump be hydraulically integrated.
The dirt traps present as standard or included for assembly

must be inspected between 4 and 8 weeks after the heat
pump is commissioned or changes made to the heating
system and cleaned if necessary. Further maintenance in-
tervals must be scheduled depending on the level of soil-
ing, which must be defined and carried out by a suitably
qualified person.
Special notes for the integration of heat pumps in
existing systems (renovations):
The existing heat distribution network (pipe materials, connec-
tion types, etc.) and the existing heating systems (e.g. radiators,
underfloor heating, etc.) can impact the quality of the water in
existing systems. Particularly when welded steel pipes or pipes
that are not oxygen diffusion-proof are used, deposits, scaling,
silting or similar may be present that can cause damage in the
heat pump system. This can result in a total failure of the heat
pump The following measures must be observed to avoid this:
Compliance with the water properties and water quality

 Flushing of the hydraulic system
Maintenance interval of the dirt traps.

If silting or ferromagnetic particles are to be expected in the hy-
draulic network, dirt separators or magnetite separators must
be installed on-site before the medium enters the heat pump.
The maintenance intervals must be defined by a suitably quali-
fied person.

8.3 Commissioning procedure

The heat pump is commissioned via the heat pump manager.
CAUTION!
Start-up must be performed in accordance with the
installation and operating instructions of the heat pump
manager.
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