Cleaning The Heating System; Cleaning The Air System; Faults / Troubleshooting; Maintenance - Dimplex LIKI 14TE Instructions D'installation Et D'utilisation

9.2 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 products enter the heating system
via the valves, the circulating pumps and/or plastic pipes. It is
therefore essential - in particular with respect to the piping of un-
derfloor 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 liquefier in the heat pump, the system must
be cleaned by a heating technician.
According to 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 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 flow of the liquefier of the heat pump.
It is important that the system be thoroughly flushed using appro-
priate neutralising agents to prevent damage caused by cleaning
agent residue remaining in the system.
Acids must be used with great care and all relevant regulations of
the employers' liability insurance associations must be adhered
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. Also open the ball valve on the pressure
expansion vessel to vent the buffer tank.

9.3 Cleaning the Air System

Air ducts, evaporator, ventilator and condensate outflow should
be cleaned of contamination (leaves, twigs, etc.) before each
new 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.
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.
www.dimplex.de

10 Faults / troubleshooting

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 in-
dicated on the heat pump manager display. 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!
Work on the heat pump may only be carried out by authorised and
qualified after-sales service technicians.

10.1 Maintenance

Refrigerating circuits with a minimum refrigerant quantity of 3 kg,
or "hermetically sealed" refrigerating circuits with a minimum re-
frigerant quantity of 6 kg, must be tested for leaks yearly by the
operator according to regulation (EC) No. 842/2006.
The leak test is to be documented and archived for a minimum of
5 years. The test is to be carried out by certified personnel only
according to regulation (EC) No. 1516/2007.
NOTE
Local regulations may differ from EU directive 842/2006. The appropriate
local regulations for heat pump leak tests must be observed.
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 require-
ments regarding the recovery, recycling and disposal of materi-
als and components in accordance with all applicable standards.
Particular attention should be paid to the proper disposal of re-
frigerants and refrigeration oils.
452160.66.44 · FD 9401
LIKI 14TE
EN-13