Drainage; Modifi Cation; Decommissioning; Leak Detection - Dimplex Edel 200 WATER/3 Installation Manual

Neglecting to clean the electronic circuit
board and the electrical components
could create a source of ignition.

7.4 - Drainage

When draining the tank, ensure that there is a suffi cient air intake at
a high point of the tank so as to avoid any depressions in the tank.
Materials and products to avoid:
- brushes with steel bristles and steel wool pads
- scouring powder
- all bleach based or chloride products
1) Switch off the power supply.
2) Shut off the cold water inlet valve on the safety group and ensure
there is an air intake valve on a high point of the appliance.
3) Open the hot water valves.
4) Set the safety group to the drainage position.

7.5 - Modifi cation

Any modifi cation of the appliance is prohibited. Any replacement
of components must be done by a professional with original parts
from the manufacturer.

7.6 - Decommissioning

7.6.1 - Leak detection

In the event of a prolonged absence with the power supply to the
housing and the product disconnected, ask a qualifi ed professional
to drain the product or protect it from freezing.
Under no circumstances should potential ignition sources be used
for the detection or detection of refrigerant leaks. A halogen fl are
(or other detector using an open fl ame) shall not be used.
• Electronic leak detectors may be used to detect refrigerant leaks,
but for fl ammable refrigerants, sensitivity may not be adequate or
may require recalibration.
• Ensure that the detector is not a potential ignition source and is
suitable for the refrigerant used. Leak detection equipment must be
set to a percentage of the lower fl ammability limit of the refrigerant
and must be calibrated for the refrigerant used. The value of 25%
of the lower fl ammable limit is used as the maximum.
• Liquid leak detectors are also suitable for use with most refrigerants
but the use of chlorine-containing detergents should be avoided
as chlorine can react with the refrigerant and corrode copper from
the piping.
• If a leak is suspected, all open flames must be suppressed /
extinguished.

7.6.2 - Removal and evacuation

• When opening the refrigeration circuit to perform repairs - or for
any other purpose - conventional procedures must be used.
• For fl ammable refrigerants, it is important to use best practice as
fl ammability must be considered.
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INSTALLER
DOMESTIC HOT WATER HEAT PUMP 200L & 270L
• The following procedure must be followed :
- Remove the refrigerant ;
- Purge the circuit with inert gas ;
- Evacuate to the atmosphere;
- Purge with inert gas ;
- Open the circuit by cutting or brazing.
• Refrigerant must be recovered in a suitable recovery bottle.
• The system must be purged with nitrogen without oxygen.
• This process may need to be repeated several times. Compressed
air or oxygen should not be used to purge refrigerant systems.
• The purge of refrigerants must be performed by breaking the
vacuum in the system with nitrogen without oxygen: By fi lling
up until the working pressure is reached, an evacuation to the
atmosphere, and fi nally by vacuum pulling.
• This process must be repeated until there is no more refrigerant
in the circuit.
• When the last oxygen-free nitrogen charge is used, the circuit must
be brought to atmospheric pressure to allow intervention.
• Ensure that the vacuum pump outlet is not near potential ignition
sources and that ventilation is available.

7.6.3 - Charging process

• Ensure that contamination of diff erent refrigerants does not occur
when using charging equipment. Hoses or lines should be as short
as possible to minimize the amount of refrigerant they contain.
• Cylinders must be held in an appropriate position according to
instructions.
• Make sure the refrigeration system is grounded before charging
the system with refrigerant.
• Label the system when the load is complete (if not already done).
• Extreme precautions must be taken to not overload the
refrigeration system.
• Before recharging the system, it must be pressure tested with the
appropriate purge gas.
• The system must undergo a leak test at the end of the load but
before commissioning. Another follow-up leak test must be
performed before leaving the site.
7.6.4 - Decommissioning
• Before performing this procedure, it is essential that the technician
knows the product and all its specifi cities.
• It is recommended to use best practices to ensure that all
refrigerants are safely recovered. Before the task is performed,
an oil and refrigerant sample must be taken in case an analysis is
required before recycling the recovered refrigerant. It is essential
that a power supply is available before the intervention begins.
a) Familiarize yourself with the product and how it works
b) Electrically isolate the system.
c) Before attempting the procedure, ensure that:
- mechanical handling equipment is diponible, if necessary, for the
handling of refrigerant cylinders ;
- all personal protective equipment is available and used correctly ;
- the recovery process is being overridden at all times by a competent
person.
- recovery equipment and cylinders comply with appropriate
standards.
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MANUAL
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