Toshiba HWT-801H8W-E Installation Manual page 6

Outdoor Unit
• The pipe-work shall be protected from physical damage.
• Compliance with national gas regulations shall be observed.
CAUTION
This Air to Water Heat Pump adopts the HFC refrigerant (R32) which
does not destroy the ozone layer.
• R32 refrigerant has a high working pressure and is apt to be
affected by impurities such as water, oxidizing membrane, and
oils. Therefore, during installation work, be careful that water, dust,
previous refrigerant, refrigerating machine oil, or other substances
do not enter the R32 refrigeration cycle.
• Special tools for R32 or R410A refrigerant are required for
installation.
• For connecting pipes, use new and clean piping materials, and
make sure that water and/or dust does not enter.
Cautions for Outdoor Unit installation space
• In the event that the Outdoor Unit is installed in a small space
and refrigerant leaks, accumulation of highly concentrated
refrigerant may cause a fire hazard. Therefore, be sure to follow
the installation space instructions in the Installation Manual, and
provide open space on at least one of the four Outdoor Unit sides.
• In particular, when both the discharge and intake sides face walls
and obstacles are also placed on both sides of the Outdoor Unit, take
steps to provide space wide enough for a person to pass (600 mm or
more) on one side to prevent leaked refrigerant from accumulating.
Obstacle
600 mm or more
To disconnect the product from main power supply
• This product must be connected to the main power supply by
means of a switch with a contact separation of at least 3 mm
9-EN
Building or wall
Outdoor Unit
Obstacle
Building or wall
– 5 –
Do not wash Air to Water Heat Pump with pressure washers
• Electric leaks may cause electric shocks or fires.
Precautions for recovery of refrigerant when servicing or
relocating unita
• When removing refrigerant from a system, either for servicing
or decommissioning, it is recommended good practice that all
refrigerants are removed safely.
• When transferring refrigerant into cylinders, ensure that only
appropriate refrigerant recovery cylinders are employed. Ensure that
the correct number of cylinders for holding the total system charge is
available. All cylinders to be used are designated for the recovered
refrigerant and labelled for that refrigerant (i.e. special cylinders
for the recovery of refrigerant). Cylinders shall be complete with
pressure- relief valve and associated shut-off valves in good working
order. Empty recovery cylinders are evacuated and, if possible,
cooled before recovery occurs.
• The recovery equipment shall be in good working order with a set of
instructions concerning the equipment that is at hand and shall be
suitable for the recovery of all appropriate refrigerants including, when
applicable, flammable refrigerants. In addition, a set of calibrated
weighing scales shall be available and in good working order. Hoses
shall be complete with leak-free disconnect couplings and in good
condition. Before using the recovery machine, check that it is in
satisfactory working order, has been properly maintained and that
any associated electrical components are sealed to prevent ignition in
the event of a refrigerant release. Consult manufacturer if in doubt.
• The recovered refrigerant shall be returned to the refrigerant supplier
in the correct recovery cylinder, and the relevant waste transfer note
arranged. Do not mix refrigerants in recovery units and especially not
in cylinders.
• If compressors or compressor oils are to be removed, ensure that
they have been evacuated to an acceptable level to make certain
that flammable refrigerant does not remain within the lubricant.
The evacuation process shall be carried out prior to returning the
compressor to the suppliers. Only electric heating to the compressor
body shall be employed to accelerate this process. When oil is
drained from a system, it shall be carried out safely.
Installation Manual
10-EN