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LI 1422C - 1826C
8.2 Cleaning the heating system
NOTE
Pressure relief devices must be checked and maintained
regularly.
NOTE
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 enter the heating system via the
valves, the circulating pumps and/or plastic pipes. A diffusion-
resistant installation is therefore essential, especially with re-
gard to the piping of underfloor heating systems.
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 event of severe contamination leading to a reduction in
the performance of the liquefier 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 both cases, 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 of the liquefier of the heat pump.
It is then 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 sys-
tem.
Acids must be used with care and the regulations of the em-
ployers liability insurance associations must be adhered to.
The instructions of the cleaning agent manufacturer must al-
ways be observed.
8.3 Cleaning the air system
Air channels, air ducts, evaporator, ventilator and condensate
outflow should be cleaned of contamination (leaves, twigs, etc.)
before each new heating period. To do this, the heat pump
must be opened at the side. The bottom section should be
opened first, followed by the top section.
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 when cleaning.
www.dimplex.de
9
This heat pump is a quality product and is designed for trouble-
free operation. Should a fault occur, however, it will be indi-
cated on the heat pump manager display. In this case, consult
the "Faults and troubleshooting" 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.
10 Decommissioning/disposal
Before removing the heat pump, disconnect it from the power
source and close all valves. The heat pump must be dismantled
by trained personnel. Observe all environmental requirements
regarding the recovery, recycling and disposal of materials and
components in accordance with all applicable standards. Par-
ticular attention should be paid to the proper disposal of refrig-
erants and refrigerant oils.
NOTE
Use suitable transport devices.
CAUTION!
Work may only be carried out on the device outdoors in dry
weather conditions. Risk of damage to the device or electric
shock!
In wet weather conditions such as rain, snow etc., the
housing of the heat pump must be kept properly closed.
CAUTION!
Weather-related conditions on transport routes. Risk of injury
due to slipping!
Transport routes must be kept clear and weather-related
conditions such as ice and snow must not impair safe
transport.
CAUTION!
Do not stand near the device during storms. Risk of lightening!
Do not stand in the immediate vicinity of the heat pump.
452170.66.01-EN · FD 0303
Faults / troubleshooting
English
EN-15
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