Commissioning; General Information; Preparation; Start-Up Procedure - Dimplex SI 22TU Instructions D'installation Et D'utilisation

7.5.3 Connection of electronically
regulated circulating pumps
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 that start-up is performed correctly, it should only be
carried out by an after-sales service technician authorised by the
manufacturer. These measures can also include an additional
warranty under certain conditions (see Warranty).

8.2 Preparation

The following items need to be checked prior to start-up:
 The heat pump must be fully connected, as described 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 heat-

ing circuits must be open.
 The heat pump manager must be adapted to the heating
system in accordance with the controller's operating instruc-
tions.

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.
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9 Maintenance and
Cleaning

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.

9.2 Cleaning the Heating System

The ingress of oxygen into the heating water circuit may result in
the formation of oxidation products (rust), particularly if steel
components are used. This oxygen enters the heating system via
the valves, the circulating pumps and/or plastic pipes. It is there-
fore essential - in particular with respect to the piping of under-
floor heating systems - that only diffusion-proof materials are
used.
NOTE
We recommend the installation of a suitable corrosion protection system
to prevent the formation of deposits (e.g. rust) in the condenser of the
heat pump. We recommend equipping diffusion-open heating systems
with an electrophysical anti-corrosion system (e.g. ELYSATOR system).
Residue from lubricants and sealants may also contaminate the
heating water.
In the case of severe contamination leading to a reduction in the
performance of the liquifier 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 either case, 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 heating sys-
tem circuit, we recommend connecting the flushing device di-
rectly to the flow and return flow of the liquifier. It is important that
the system be thoroughly flushed using appropriate neutralising
agents to prevent any damage from being caused by cleaning
agent residue remaining in the system.
Acids must be used with great care and 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.
9.3

Cleaning the Heat Source System

ATTENTION!
The supplied dirt trap must be inserted in the heat source inlet of the heat
pump to protect the evaporator against the ingress of impurities.
The filter sieve of the dirt trap should be cleaned one day after-
start-up. Further checks must be set according to the level of
dirt.If no more signs of contamination are evident, the filter can
be removed to reduce pressure drops.
452235.66.01 · FD 9310
SI 22TU
EN-9