Cleaning / Maintenance; Cleaning & Maintenance; Cleaning The Heating System; Cleaning The Air System - Dimplex LAJ 11MUR Instructions D'installation Et D'utilisation

8

Cleaning / maintenance

8.1 Maintenance
To protect the paintwork, avoid leaning anything against the de-
vice or putting objects on the device. External heat pump parts
can be wiped with a damp cloth and commercially available do-
mestic 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 system
cannot be contaminated. Should operating malfunctions due to
contamination still occur, however, the system should be cleaned
as described below.

8.2 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. These enter the heating system via the
valves, the circulating pumps and/or plastic pipes. A diffusion-re-
sistant installation is therefore essential, especially with regard 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. We recommend equipping diffusion-open heating systems
with an electrophysical anti-corrosion system (e.g. ELYSATOR system).
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 % phos-
phoric acid solution for cleaning purposes. However, if cleaning
needs to be performed more frequently, a 5 % formic acid solu-
tion should be used.
In both cases, the cleaning fluid should be at room temperature.
We recommend flushing the heat exchanger in the direction op-
posite to the normal flow direction.
To prevent acidic cleaning agents from entering the heating sys-
tem circuit, we recommend connecting the flushing device di-
rectly 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 in order to prevent any damage
from being caused by cleaning agent residue remaining in the
system.
Acids must be used with care and the regulations of the employ-
ers' liability insurance associations must be adhered to.
The manufacturer's instructions regarding cleaning agent must
be complied with at all times.
www.dimplex.de
All manuals and user guides at all-guides.com
452159.66.37 · FD 9311

8.3 Cleaning the air system

The evaporator, ventilator and condensate outflow should be
cleaned of contamination (leaves, twigs, etc.) before each new
heating period. Do this by opening the front of the heat pump.
The bottom should be opened first, followed by the top.
ATTENTION!
Before opening the device, ensure that all circuits are disconnected from
the power supply.
Remove and re-hang 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.
Under extreme weather conditions (e.g. snow drifts), ice may
form on the air intake and air outlet grids. If this happens, the ice
must be removed from the vicinity of the air intake and air outlet
grids to ensure that the minimum air flow is maintained.
9

Faults / troubleshooting

This heat pump is a quality product and is designed for trouble-
free operation. Should a fault occur, however, it will be indicated
on the heat pump manager display. In this case, consult the
"Faults and troubleshooting" page in the operating instructions of
the heat pump manager. If you cannot correct the fault yourself,
please contact your after-sales service technician.
ATTENTION!
Any work on the heat pump must only be performed by an authorised and
qualified after-sales service technician.
10 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-
mental requirements regarding the recovery, recycling and dis-
posal of materials and components in accordance with all appli-
cable standards. Particular attention should be paid to the proper
disposal of refrigerants and refrigerant oils.
LAJ 11 MUR - LAJ 16 MUR
EN-7