Hitachi RPC-5.0FSR Operation Manual page 8

DANGER
● Do not perform the installation work, refrigerant piping work, drain pump, drain piping and electrical wiring
connection without referring to our installation manual. If the instructions are not followed, it may result in
a water leakage, electric shock or a fire.
● This machine uses refrigerant R410A or refrigerant R32.
The type of enclosed refrigerant is described in the specification nameplate and caution nameplate
attached to the outdoor unit. When installing, repairing, or relocating, do not mix substances other than the
refrigerant described on the specification nameplate or caution nameplate attached to the outdoor unit.
Also, do not mix refrigerant R410A and refrigerant R32. Entering non-designated refrigerants, air, oxygen,
flammable substances such as propane or alcohol may cause explosion, fire or injury.
● Do not pour water into the indoor unit. These products are equipped with electrical parts.
If poured, it will cause a serious electrical shock.
● Do not open the service cover for the indoor or outdoor unit without turning OFF the main power supply.
● Do not touch or adjust safety devices inside the indoor unit or outdoor unit. If these devices are touched
or readjusted, it may cause a serious accident.
● Refrigerant leakage can cause difficulty with breathing due to insufficient air. Turn OFF the main switch,
extinguish any naked flames and contact your service contractor, if refrigerant leakage occurs.
● Make sure that a refrigerant leak test has been performed. Refrigerant (Fluorocarbon or Difluoromethane)
for this unit is non-toxic, and odorless. If the refrigerant should somehow escape and come into contact
with flame, toxic gas will form. This gas is heavier than air and will settle near floor areas and spread
where it can cause suffocation to those nearby. In addition, difluoromethane is flammable and can cause
fire.
● The installer and system specialist shall secure safety against refrigerant leakage according to local
regulations or standards.
● Use an ELB (Earth Leakage Breaker).
In the event of fault, there is danger of an electric shock or a fire if it is not used.
● Do not install the outdoor unit where there is high level of oil mist, flammable gases, salty air or harmful
gases such as sulfur.
● For installation, firmly connect the refrigerant pipe before the compressor starts operating.
For maintenance, relocation and disposal, remove the refrigerant pipe after the compressor stops.
● Do not perform a short-circuit of the protection device such as the pressure switch when operating.
It may cause a fire and explosion.
● Do not alter the product and the electrical wiring. It will cause a serious accident.
● Do not install the indoor unit in flammable environment to avoid fire or an explosion.
● As the new refrigerant (R410A or R32) is adopted, the refrigerant oil has been also changed, which tends
to be affected by foreign matters such as moisture, oxide film, fat. Perform the installation work with
care not to enter moisture, dust or old refrigerant into the refrigerant cycle, otherwise the parts such as
expansion valve bite foreign matter and the operation may be unavailable.
● Do not insert the drain pipe to the drainage trench where corrosive gases occur. Poisonous gases flow
into the room, so that may cause the poisoning.
● Cleaning inside Existing Refrigerant Pipe
* Non-flammable and nontoxic detergent shall be used to clean the pipe. If not, it may cause a fire.
* Ventilate well, otherwise cleaning the pipe in the sealed room may cause suffocation. Additionally, if the
detergent contacts a fire and is under high temperature, it may cause generation of toxic gas.
* The detergent after cleaning shall be recovered. It is prohibited to emit fluorocarbons to the atmosphere
without permission.
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