Main Unit and Piping
Electrical
Test Operation
Reference
39
6. Drain Piping Installation
Important reminder in the cold district
[Installation]
�
Make anti-freezing treatment on the exhaust water drain piping in the cold district (the area where the out-
side air temperature can fall below 32 deg F (0 deg C)) to prevent drain water freezing. Drain water
freezing will damage the unit.
�
Do not make anti-freezing treatment on the pipe where the exhaust water drain hose is inserted.
(See below.)
Otherwise, the portion will overheat and damage the unit.
[Unit]
�
Install an exhaust water drain hose with heater (sold separately) in the cold district (the area where the
outside air temperature can fall below 32 deg F (0 deg C)). Refer to the installation manual attached to
the exhaust water drain hose with heater for installation method.
�
The cold district specification unit contains the exhaust water drain hose with heater in the engine com-
partment. Be sure to pull out the hose from the outdoor unit referring to the installation manual attached
to the hose. Failing to pull out the hose will damage the unit.
Exhaust water
drain hose
Size at the end of the exhaust
water drain pipe:
Hard PVC pipe VP30
(VP50 for cold district specification)
Released to
the atmosphere
Breather
Breather
Rear side of
outdoor unit
Catch basin
Exhaust water drain pipe
Downward gradient must be 1/50 or more
Released to
the atmosphere
Exhaust water
drain pipe
Exhaust water
drain hoses
Enlarged view
Exhaust water
drain hose
with heater
Exhaust water drain hose
Exhaust water drain pipe
Released to the atmosphere
Do not make anti-freezing
treatment here
Anti-freezing treatment