Saijo Denki CVIA-100-CPF3, Service Manual

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Assembly/
Wiring
Insulator
check
Ventilation
Saijo denki International co.,ltd.
8
When the refrigerant gas leaks during work, execute ventilation.
If the refrigerant gas touches to a fire, poisonous gas generates. A case of leakage of the refrigerant
and the closed room full with gas is dangerous because a shortage of oxygen occurs. Be sure to execute
ventilation.
When the refrigerant gas leaks, find up the leaked position and repair it surely.
If the leaked position cannot be found up and the repair work is interrupted, pump-down and tighten the
service valve, otherwise the refrigerant gas may leak into the room.
The poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove
though the refrigerant gas itself is innocuous.
When installing equipment which includes a large amount of charged refrigerant such as a multi air
conditioner in a sub-room, it is necessary that the density does not the limit even if the refrigerant leaks. If
the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is caused.
After installation work, check the refrigerant gas does not leak. If the refrigerant gas leaks in the room,
poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove though the
refrigerant gas itself is innocuous.
Never recover the refrigerant into the outdoor unit. When the equipment is moved or repaired, be sure to
recover the refrigerant with recovering device.
The refrigerant cannot be recovered in the outdoor unit; otherwise a serious accident such as
breakage or injury is caused.
After repair work, surely assemble the disassembled parts, and connect and lead the removed wires as
before. Perform the work so that the cabinet or panel does not catch the inner wires.
If incorrect assembly or incorrect wire connection was done, a disaster such as a leak or fire is caused at
user’s side.
Refrigerant
Compulsion
Do not charge refrigerant additionally. If charging refrigerant additionally when refrigerant gas leaks, the
refrigerant composition in the refrigerating cycle changes resulted in change of air conditioner
characteristics or refrigerant over the specified standard amount is charged and an abnormal high pressure
is applied to the inside of the refrigerating cycle resulted in cause of breakage or injury. Therefore if the
refrigerant gas leaks, recover the refrigerant in the air conditioner, execute vacuuming, and then newly
recharge the specified amount of liquid refrigerant. In this time,
never charge the refrigerant over the specified amount.
When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant or air other than
R410A into the specified refrigerant. If air or others is mixed with the refrigerant, abnormal high pressure
generates in the refrigerating cycle resulted in cause of injury due to breakage.
Tighten the flare nut with a torque wrench in the specified manner.
Excessive tighten of the flare nut may cause a crack in the flare nut after a long period, which may result
in refrigerant leakage.
Nitrogen gas must be used for the airtight test.
The charge hose must be connected in such a way that it is not slack.
For the installation/moving/reinstallation work, follow to the Installation Manual.
If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or fire is
caused.
After the work has finished, be sure to use an insulation tester set (500V Megger) to check the resistance
is 1M: or more between the charge section and the non-charge metal section (Earth position).
the resistance value is low,
a disaster such as a leak or electric shock is caused at user’s side.