Commissioning; General Information; Preparatory Steps; Commissioning Procedure - Dimplex SI 75TER+ Instructions D'installation Et D'utilisation

7.5.3 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 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 condi-
tions (see Warranty). Start-up should be carried out in heating
operation.

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 manager must be adapted to
the heating installation in accordance with the instructions
contained in the controller's operating manual.

8.3 Commissioning Procedure

The start-up of the heat pump is effected via the heat pump man-
ager.
ATTENTION!
Commissioning is to be effected in accordance with the installation and
operating manual of the heat pump manager.
www.dimplex.de
9

Care/Cleaning

9.1 Care

To prevent malfunctions due to sediments in the heat exchang-
ers, care must be taken that no im-purities can enter the heat
source system and the heating installation. In the event that op-
erating malfunctions due to contamination occur nevertheless,
the system should be cleaned as described below.

9.2 Cleaning of Heating Side

ATTENTION!
The supplied strainer must be fitted in the heating water inlet of the heat
pump in order to protect the condenser against the ingress of impurities.
The ingress of oxygen into the heating water circuit, in particular
if it contains steel components, may result in the formation of ox-
idation products (rust). These can enter the heating system via
valves, circulating pumps or plastic tubing. It is therefore impor-
tant - in particular with respect to the piping of underfloor heating
systems - that the installation be executed in a diffusion-proof
manner.
NOTE
To prevent the accumulation of deposits (e.g. rust) we recommend using
a suitable corrosion protection system.
In the case of severe contamination leading to a reduction in the
performance of the condenser in the heat pump, the system must
be cleaned by a heating technician.
Based on current information, we recommend using a 5 % phos-
phoric acid solution for cleaning purposes. However, if cleaning
needs to be performed more frequently, a 5 % formic acid solu-
tion should be used.
In both cases, the cleaning fluid should be at room temperature.
We recommend flushing the heat exchanger in the direction op-
posite to the normal flow direction.
To prevent acidic cleaning agents from entering the circuit of the
heating installation we recommend that the flushing device be fit-
ted directly to the supply and return lines of the condenser of the
heat pump.
Thereafter the system must be thoroughly flushed using appro-
priate neutralising agents in order to prevent any damage caused
by cleaning agent residues that may still be present in the sys-
tem.
All acids must be used with great care, all relevant regulations of
the employers' liability insurance associations must be adhered
to.
The manufacturer's instructions regarding cleaning agent must
be complied with at all times.
452234.66.22 · FD 9411
SI 75TER+
EN-9