Miscellaneous Notes; Miscellaneous Notes - Hitachi RPC-1.5FSR Technical Catalogue

11. Miscellaneous Notes

Special Notes
1. Provide a service access door near the unit
piping connection part on the false ceiling for the
ceiling type units.
2. Consider the air distribution from the unit to the
space of the room, and select a suitable location
so that uniform air temperature in the room can
be obtained.
Avoid unit installation in a room where the ceiling
height (distance between the floor to the false
ceiling) exceeds three meters. If the indoor unit
is installed in a room with a ceiling more than
three meters in height, it is recommended that
an air circulation fan be installed separately
to obtain uniform air temperature in the room,
especially during the heating operation.
3. Check to ensure that the ceiling slab is strong
enough and that the false ceiling is flat and level.
4. Avoid obstacles which may restrict the air intake
or the discharge flow.
5. Do not install the unit in a machinery shop or
kitchen where vapor from oil or its mist can enter
the unit.
The oil will deposit on the heat exchanger,
which may reduce the unit performance, cause
deformation, and in the worst case, break the
plastic parts of the unit.
6. Pay attention to the following points when the
unit is installed in a hospital or other facilities
where electromagnetic wave is radiated from
medical equipment.
(A) Do not install the unit where the
electromagnetic wave is directly radiated to
the electrical box, controller cable or wired
controller.
(B) Install the unit and component as far from an
electromagnetic wave radiator (at least three
meters) as possible.
(C) Prepare a steel box and install the wired
controller in it. Prepare a steel conduit pipe
and wire the controller cable in it. And then,
connect earth wire with the box and the pipe.
(D) Install a noise filter when the power supply
emits harmful noise.
7. Do not install the units in an acid or alkaline
environment, as the heat exchanger will be
damaged by corrosive action. In the case that
outdoor units are installed near the sea, it is
recommended that optional corrosion-resistant-
type outdoor unit be used.
8. Do not install the units in a flammable
environment, as there is a danger of an
explosion.
9. Regarding ceiling type indoor units, consider the
direct and reflected sound level, when selecting
the unit for spaces where extremely low sound is
required.
TCI-20007-rev.1

MISCELLANEOUS NOTES

10. During heating operation, the outdoor heat
exchanger produces condensate dew
condensation or melted frost water.
Install the outdoor unit where such water can
be drained, or provide a drain passage.
11. Heating Performance: The heating capacity
normally decreases when outdoor temperatures
decrease. Therefore, provide an auxiliary
heating unit if outdoor temperatures are very
low.
12. In the case that an outdoor temperature is
low and humidity is high, the outdoor heat
exchanger will covered with frost, resulting in
lower heating capacity. In order to remove
the frost, the unit is automatically changed to
the defrosting mode. During this defrosting
operation, the unit stops for approximately 3 to
10 minutes.
13. As this unit is of heat pump type by circulating
hot air in the whole room space, it takes time to
heat up the room temperature.
14. The operating sound data is based on an
anechoic chamber. Therefore, the actual
operating sound will be higher due to reflected
sound from the floor and wall.
15. In the case that the unit is operated for a long
time at an indoor temperature of over 27
DB or at an indoor humidity of over 80%, dew
condensation may occur on the cabinets,
resulting in dew drops.
If dew condensation occurs, it is required to
add thermal insulator on the cabinets.
16. Provide snow-protection hoods to prevent snow
from clogging the outdoor heat exchanger.
If the unit is operated in an area where it snows
heavily, provide a base under the outdoor
unit, which should be 50cm higher than the
presumable maximum snow height.
17. It is recommended that periodical service and
maintenance be performed by authorized
service engineers before air conditioning
seasons, in order to avoid performance
decrease due to dust or dirt.
18. This heat pump air conditioner has been
designed for normal air conditioning for men.
Do not use the product for other purposes such
as for food, animals, plants, high precision
machines or work of art. Also do not use the
product for vehicles or vessels. It will results in
water leakage or electrical leakage.
19. It is recommended that the system be installed
by authorized engineers. If not, it may cause
water leakage, electric shock or fire.
20. In a place where fibers or dusts are floating, the
air filter or heat exchangers or the drain pipe
may be clogged, resulting in water leakage
from the drain pan.
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