Toshiba RAS-25S4KVPG-ND Service Manual page 5

For R32 model, use pipes, flare nut and tools which is specifi ed for R32 refrigerant. Using of existing (R22)
•
piping, flare nut and tools may cause abnormally high pressure in the refrigerant cycle (piping), and possibly
result in explosion and injury.
•
Thickness of copper pipes used R32 must be more than 0.8mm. Never use copper pipes thinner than 0.8mm.
• Do not perform flare connection inside a building or dwelling or room, when joining the heat exchanger of
indoor unit with interconnection piping. Refrigerant connection inside a building or dwelling or room must be
made by brazing or welding. Joint connection of indoor unit by flaring method can only be made at outdoor or
at outside of building or dwelling or room. Flare connection may cause gas leak and flammable atmosphere.
• After completion of installation or service, confirm there is no leakage of refrigerant gas. It may generate toxic
gas when the refrigerant contacts with fire.
• Appliance and pipe-work shall be installed, operated and stored in a room with a floor area large than A
How to get A m : A
2
min
M is the refrigerant charge amount in appliance in kg. h
for floor standing/1.8m for wall mounted/1.0 m for window mounted/2.2 m for ceiling mounted.
• Comply with national gas regulations.
• Do not add any other devices without factory advice.
• After installation work, make sure below before operation.
- Connection pipes are connected properly and no leakage.
- Packed valves are fully open.
Running compressor without open packed valves may cause abnormal high pressure and parts failure.
Leakage at connection piping may suck air and make further high pressure cause burst and injure.
• During pump down work make sure below process.
- Don't mix air into the refrigerant cycle.
- Stop the compressor before removing piping after packed valves are fully closed.
Removing piping under the compressor running and packed valves open,
air might be sucked and refrigeration cycle pressure becomes abnormally high,
and it causes burst or injury on persons.
• Exposure of unit to water or other moisture before installation may result in an electrical short.
Do not store in a wet basement or expose to rain or water.
• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify
the noise level of the unit or where noise or discharged air might disturb neighbors.
• To avoid personal injury, be careful when handling parts with sharp edges.
• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.
• Please read this installation manual carefully before installing the unit. It contains further important
instructions for proper installation, Improper installation may cause fire, burst, electric shock, injury and
water leakage.
For Reference:
If a heating operation would be continuously performed for a long time under the condition that the outdoor
temperature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom
plate, resulting in a trouble of the cabinet or fan.
It is recommended to procure an antifreeze heater locally for a safe installation of the air conditioner.
For details, contact the dealer.
= (M / (2.5 x 0.22759 x h
min
))
2
0
is the installation height of the appliance in m : 0.6 m
0
WARNING
CAUTION
- 5 -
m
2
min