Maintenance And Cleaning; Maintenance; Cleaning The Heating System; Cleaning The Heat Source System - Dimplex SI 6TU Instructions D'installation Et D'utilisation

SI 6TU - SI 18TU
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.
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 ad-
hered to.
The manufacturer's instructions regarding cleaning agent must
be complied with at all times.
9.3 Cleaning the Heat Source
System
CAUTION!
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.
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10 Faults / Trouble-Shooting

This heat pump is a quality product and is designed for trouble-
free operation. In the event that a fault should occur, it will be
indicated on the heat pump manager display. Simply consult
the Faults and Trouble-Shooting page in the operating instruc-
tions of the heat pump manager.
If you cannot correct the fault yourself, please contact your
after-sales service technician.
CAUTION!
Before opening the device, ensure that all circuits are
disconnected from the power supply!
After disconnecting the power supply, always wait for at least
5 minutes to allow stored electric charges to dissipate.
CAUTION!
Any work on the heat pump may only be performed by
authorised and qualified after-sales service technicians.
11 Decommissioning /
Disposal
Before removing the heat pump, disconnect it from the power
source and close all valves. The deinstallation of the heat pump
must be performed by technical personnel. Observe all environ-
mentally-relevant requirements regarding the recovery, recy-
cling and disposal of materials and components in accordance
with all applicable standards. Particular attention should be
paid to the proper disposal of refrigerants and refrigeration oils.
452235.66.22a · FD 0106
English
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