Panasonic WH-UD03JE5 Installationshandbuch Seite 3

Installation work.
It may need two or more people to carry out the installation work. The weight of outdoor unit might cause injury if carried by one person.
Keep any required ventilation openings clear of obstruction.
PRECAUTION FOR USING R32 REFRIGERANT
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The basic installation work procedures are the same as conventional refrigerant (R410A, R22) models.
However, pay careful attention to the following points:
Since the working pressure is higher than that of refrigerant R22 models, some of the piping and installation and service tools are special.
Especially, when replacing a refrigerant R22 model with a new refrigerant R32 model, always replace the conventional piping and fl are nuts with
the R32 and R410A piping and fl are nuts on the outdoor unit side.
For R32 and R410A, the same fl are nut on the outdoor unit side and pipe can be used.
The mixing of different refrigerants within a system is prohibited. Models that use refrigerant R32 and R410A have a different charging port thread
diameter to prevent erroneous charging with refrigerant R22 and for safety.
Therefore, check beforehand. [The charging port thread diameter for R32 and R410A is 12.7 mm (1/2 inch).]
Ensure that foreign matter (oil, water, etc.) does not enter the piping.
Also, when storing the piping, securely seal the opening by pinching, taping, etc. (Handling of R32 is similar to R410A.)
Operation, maintenance, repairing and refrigerant recovery should be carried out by trained and certifi ed personnel in the use of fl ammable
refrigerants and as recommended by the manufacturer. Any personnel conducting an operation, servicing or maintenance on a system or
associated parts of the equipment should be trained and certifi ed.
Any part of refrigerating circuit (evaporators, air coolers, AHU, condensers or liquid receivers) or piping should not be located in the proximity of
heat sources, open fl ames, operating gas appliance or an operating electric heater.
The user/owner or their authorized representative shall regularly check the alarms, mechanical ventilation and detectors, at least once a year,
where as required by national regulations, to ensure their correct functioning.
A logbook shall be maintained. The results of these checks shall be recorded in the logbook.
In case of ventilations in occupied spaces shall be checked to confi rm no obstruction.
Before a new refrigerating system is put into service, the person responsible for placing the system in operation should ensure that trained and
certifi ed operating personnel are instructed on the basis of the instruction manual about the construction, supervision, operation and maintenance
of the refrigerating system, as well as the safety measures to be observed, and the properties and handling of the refrigerant used.
The general requirement of trained and certifi ed personnel are indicated as below:
a) Knowledge of legislation, regulations and standards relating to fl ammable refrigerants; and,
b)  D etailed knowledge of and skills in handling fl ammable refrigerants, personal protective equipment, refrigerant leakage prevention, handling
of cylinders, charging, leak detection, recovery and disposal; and,
c) Able to understand and to apply in practice the requirements in the national legislation, regulations and Standards; and,
d) Continuously undergo regular and further training to maintain this expertise.
Air-to-Water Heatpump piping in the occupied space shall be installed in such a way to protect against accidental damage in operation and service.
Precautions shall be taken to avoid excessive vibration or pulsation to refrigerating piping.
Ensure protection devices, refrigerating piping and fi ttings are well protected against adverse environmental effects (such as the danger of water
collecting and freezing in relief pipes or the accumulation of dirt and debris).
Expansion and contraction of long runs piping in refrigerating systems shall be designed and installed securely (mounted and guarded) to
minimize the likelihood hydraulic shock damaging the system.
Protect the refrigerating system from accidental rupture due to moving furniture or reconstruction activities.
To ensure no leaking, fi eld-made refrigerant joints indoors shall be tightness tested. The test method shall have a sensitivity of 5 grams per year of
refrigerant or better under a pressure of at least 0,25 times the maximum allowable pressure (>1.04MPa, max 4.15MPa). No leak shall be detected.
1.
Installation (Space)
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Must ensure the installation of pipe-work shall be kept to a minimum. Avoid use dented pipe and do not allow acute bending.
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Must ensure that pipe-work shall be protected from physical damage.
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Must comply with national gas regulations, state municipal rules and legislation. Notify relevant authorities in accordance with all applicable
regulations.
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Must ensure mechanical connections be accessible for maintenance purposes.
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In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction.
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When disposal of the product, do follow to the precautions in #12 and comply with national regulations.
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In case of fi eld charge, the effect on refrigerant charge caused by the different pipe length has to be quantifi ed, measured and labelled.
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Always contact to local municipal offi ces for proper handling.
WARNING
CAUTION
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