Maintenance / Cleaning; Maintenance; Cleaning The Heating System; Cleaning The Air System - Dimplex LIK 8TES Instructions D'installation Et D'utilisation

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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.
According to today's state of knowledge, we recommend using
a 5 % phosphoric acid solution for cleaning purposes. However,
if cleaning needs to be performed more frequently, a 5 % for-
mic 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.
EN-12
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.
The buffer tank is drained using the filling and drain cocks on
the lower left of the device.

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 left and front sides of the
heat pump. The bottom should be opened first followed by the
top.
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 5.
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 and maintenance-free operation. In the event that a fault
should occur, it will be shown on the heat pump manager dis-
play. Simply consult the Faults and Trouble-shooting page in
the operating instructions 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!
Work on the heat pump may only be carried out 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 heat pump must be installed by
trained personnel. Observe all environmentally-relevant re-
quirements regarding the recovery, recycling and disposal of
materials and components in accordance with all applicable
standards. Particular attention should be paid to the proper dis-
posal of refrigerants and refrigeration oils.
452161.66.20a · FD 0106
LIK 8TES
www.glendimplex.de