Commissioning; General Information; Preparatory Steps - Dimplex SIH 20TE Installation And Operating Instruction

SIH 20TE
7.6.3 Connecting an electronically
regulated circulating pump
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, defrost and frost protection mode. In sys-
tems with multiple heating circuits, the 2nd and 3rd heat circu-
lating 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 proper commissioning it should be carried out by a
customer service authorised by the manufacturer. These meas-
ures can also include an additional warranty under certain con-
ditions (see Warranty).

8.2 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 7.
 The heat source system and the heating circuit must have
been filled and checked.
 The strainer must have been fitted in the sole inlet of the
heat pump.
In the brine and heating circuits all valves that might impair

the proper flow must be open.
The settings of the heat pump controller must be adapted

to the heating installation in accordance with the instruc-
tions contained in the controller's operating manual.
 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.
452234.66.77b · FD 0307
English
EN-11