Maintenance / Cleaning; Maintenance; Cleaning The Heating System; Cleaning The Air System - Dimplex LI 16I-TUR Instructions D'installation Et D'utilisation

LI 16I-TUR
9

Maintenance / Cleaning

9.1 Maintenance

To protect the paintwork, avoid leaning or putting objects on
the device. External heat pump parts can be wiped with a damp
cloth and domestic cleaner.
NOTE
Never use cleaning agents containing sand, soda, acid or
chloride as these can damage the surfaces.
To prevent faults due to sediment in the heat exchanger of the
heat pump, ensure that the heat exchanger in the heating sys-
tem can not be contaminated. We recommend protecting the
evaporator by installing a bird guard in the inlet duct. At least
80 % of the cross section of the grating should be open. In the
event that operating malfunctions due to contamination still
occur, the system should be cleaned as described below.

9.2 Cleaning the Heating System

CAUTION!
The integrated dirt trap must be cleaned at regular intervals.
The maintenance intervals should be defined according to the
degree of soiling in the system. The filter insert should also be
cleaned.
For cleaning, the heating circuit must be made pressureless in
the vicinity of the dirt trap, the filter compartment unscrewed,
and the filter insert removed and cleaned. Assembly carried out
in reverse order requires attention to correct assembly of the
screen inserts and tightness of the screw joints.
The ingress of oxygen into the heating water circuit may result
in the formation of oxidation products (rust), particularly if steel
components are used. These products enter the heating sys-
tem 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 of the heat
pump.
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It is important that the system be thoroughly flushed using ap-
propriate neutralising agents to prevent any damage from
being caused by cleaning agent residue remaining in the sys-
tem.
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 Air System

Air ducts, evaporator, ventilator and condensate outflow should
be cleaned of contamination (leaves, twigs, etc.) before the
heating period. Do this by opening the front of the heat pump.
To do this, the heat pump must be opened at the side. The bot-
tom section should be opened first, followed by the top section.
CAUTION!
Before opening the device, ensure that all circuits are isolated
from the power supply.
Remove and rehang the side panel assemblies as described in
Chapter 4.
To prevent the evaporator and the condensate tray from being
damaged, do not use hard or sharp objects for cleaning.

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
shown on the heat pump manager display. Simply consult the
Faults and Trouble-shooting page in the operating instructions
of the heat pump manager. If you cannot correct the fault your-
self, please contact your after-sales service technician.
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.
452169.66.06 · FD 0009
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