Maintenance / Cleaning; Maintenance; Cleaning The Heating System; Cleaning The Air System - Dimplex LA 14PMS Instructions D'installation Et D'utilisation

8

Maintenance / Cleaning

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 domestic cleaner.
ATTENTION!
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
can not be contaminated. In the event that operating malfunc-
tions due to contamination still occur, the system should be
cleaned as described below. The device may only be cleaned ac-
cording to the following instructions from the manufacturer.

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. They enter the heating system via the
valves, the circulating pumps and/or plastic pipes. It is therefore
essential - in particular with respect to the entire pipework - that
only diffusion-resistant materials are used.
ATTENTION!
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 case 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 either case, 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 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.
In case of doubt, consult the manufacturer of the cleaning
agents!
www.dimplex.de

8.3 Cleaning the Air System

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 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.
ATTENTION!
The refrigerating circuit may not be damaged in any way.
Inflammable refrigerant could leak out if the refrigerating circuit is
damaged. Ignition sources and open flames must be avoided
when carrying out any work on the device.
Under extreme weather conditions (e.g. snow drifts), ice may
form on the air intake and exhaust air outlet grids. If this happens,
the ice must be removed in the vicinity of the air intake and ex-
haust air outlet grids to ensure that the minimum air flow rate is
maintained.
9

Faults / Troubleshooting

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 indicated on the heat pump manager dis-
play. In this case, consult the Faults and troubleshooting page in
the operating instructions of the heat pump manager. If you can-
not correct the fault yourself, please contact your after-sales
service technician.
ATTENTION!
Any work on the heat pump may only be performed by authorised and
qualified after-sales service technicians.
Anyone carrying out work on the refrigerating circuit must be cer-
tified to safely handle inflammable refrigerants or be supervised
by a person having such certification.
10 Decommissioning /
Disposal
Before removing the heat pump, disconnect it from the power
source and close all valves. Observe all environmentally-relevant
requirements 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 refrigerant oils.
10
EN-7