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

SI 22TU
7.5.3 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.
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 addi-
tional 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

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.

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
therefore essential - in particular with respect to the piping of
underfloor 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
electrophysical
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 %
phosphoric acid solution for cleaning purposes. However, if
cleaning needs to be performed more frequently, a 5 % formic
acid solution should be used.
In either case, the cleaning fluid should be at room tempera-
ture. We recommend flushing the heat exchanger in the direc-
tion opposite to the normal flow direction.
To prevent acidic cleaning agents from entering the heating
system circuit, we recommend connecting the flushing device
directly to the flow and return flow of the liquifier. It is important
that the system be thoroughly flushed using appropriate neu-
tralising 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.
452235.66.25 · FD 9912
diffusion-open heating
anti-corrosion system
English
systems with an
(e.g. ELYSATOR
EN-9