Hitachi RAF-35RPA RAF35RPA User Manual
Product codes
RAF35RPA
15-5
15.2.5. AS TO PROPER DRAINAGE OF
DEFROSTING WATER
•
At cold districts, there is a possibility that drainage
can not be done due to freezing the defrosting
water on the base surface. Therefore, please
remove the drain pipes attached to the bottom of
the outdoor unit and the bushes. If any, install at
places where the defrosting water can flow
smoothly.
can not be done due to freezing the defrosting
water on the base surface. Therefore, please
remove the drain pipes attached to the bottom of
the outdoor unit and the bushes. If any, install at
places where the defrosting water can flow
smoothly.
•
The drainage holes will be covered by icicles
which produced by the defrosting water from the
bottom. Therefore please mount the unit at least
250mm from the eaves and so on.
which produced by the defrosting water from the
bottom. Therefore please mount the unit at least
250mm from the eaves and so on.
To make better drainage from bottom face of the
outdoor unit
outdoor unit
CAUTION:
–
–
Drainage of the defrosting water by connecting the
drain pipe will cause freezing. Do not do it.
drain pipe will cause freezing. Do not do it.
–
If the bushes are not removed, the defrosting water will
be frozen at the base of the heat exchanger. This
causes heating capacity to drop and abnormal noise
operation.
be frozen at the base of the heat exchanger. This
causes heating capacity to drop and abnormal noise
operation.
–
If the blocks of the plastic block racks are used, the
drainage hole at the base bottom may be blocked or
covered with icicles (frozen water from defrost). Do not
do it.
drainage hole at the base bottom may be blocked or
covered with icicles (frozen water from defrost). Do not
do it.
Ensure enough clearance at the ground when installing
the unit so the water could drain out smoothly.
the unit so the water could drain out smoothly.
15.2.6. REQUEST TO CUT NET ATTACHED TO
REAR SIDE OF OUTDOOR UNIT
At the places, where snow enters into the air inlet, the net
at the rear side will lead to easy snow accumulation.
Moreover, only the snow around the heat exchanger may
be melted during defrosting whereas snow that attached to
the net will remain stuck and not melt. Therefore, please
cut the net at the rear after installation.
at the rear side will lead to easy snow accumulation.
Moreover, only the snow around the heat exchanger may
be melted during defrosting whereas snow that attached to
the net will remain stuck and not melt. Therefore, please
cut the net at the rear after installation.
15.2.7. INSTALLATION OF HOT PIPE
At places where the temperature is low, water from
defrost can freeze easily and is impossible to drain out from
the base bottom. The Hot-pipe is to be used so that the
drainage holes will not be blocked.
the base bottom. The Hot-pipe is to be used so that the
drainage holes will not be blocked.
NOTE:
–
–
No responsibility is accepted for any form of use other
than the designated applications.
than the designated applications.
–
Heating and cooling capability may be slightly affected
by the use of the hot pipe.
by the use of the hot pipe.
–
Time taken to heat and cool may be slightly longer
when the hot pipe is used.
when the hot pipe is used.
1. Turn off the circuit breaker and remove the connecting
cord.
2. Remove the attached pipes from the service valve.
3. Remove external parts as show in below figure.
3. Remove external parts as show in below figure.
Service valve for small diameter
side of outdoor unit
side of outdoor unit
Small diameter
pipe
pipe
Hot pipe
The defrosting
water should be
drained out as
soon as
possible
water should be
drained out as
soon as
possible
At least
250mm from
ground level
250mm from
ground level
Please remove the drain
pipes/bushes completely
pipes/bushes completely
Although installed
on the wall, drain
holes will still be
blocked by icicles
when water could
not be drained out
properly caused by
insufficient
clearance at the
bottom base.
on the wall, drain
holes will still be
blocked by icicles
when water could
not be drained out
properly caused by
insufficient
clearance at the
bottom base.
Installation using
high position racks
high position racks
Installation using
metal fittings on wall
metal fittings on wall
Net
Outdoor
unit side
heat
exchange
unit side
heat
exchange
Base of
outdoor
unit
outdoor
unit
Net
Enlarged figure of
this portion
this portion
Outdoor
temperature
thermistor
temperature
thermistor
Cut off position
As the upper drawing, please cut off
and remove the lower part of the net.
and remove the lower part of the net.