Carrier CDII-184R1-0CTR4 Installation & Operation Manual page 8

If the refrigerant gas touches to a fire, poisonous gas generates. A case of leakage of the
refrigerant and the closed room full of gas is dangerous because a shortage of oxygen occurs.
Be sure to execute ventilation.
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.
Tighten the flare nut with a torque wrench in the specified manner.
Compulsion
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.
Once the repair work has been completed, check for refrigerant leaks, and check the insulation
resistance and water drainage.
Then perform a trial run to check that the air conditioner is running properly.
After repair work has finished, check there is no trouble. If check is not executed, a fire, electric
shock or injury may be caused. For a check, turn off the power breaker.
After repair work (installation of front panel and cabinet) has finished, execute a test run to
Check after
check there is no generation of smoke or abnormal sound.
repair
If check is not executed, a fire or an electric shock is caused. Before test run, install the front
panel and cabinet.
Be sure to fix the screws back which have been removed for installation or other purposes.
Check the following matters before a test run after repairing piping.
•
•
Do not
Running the compressor under condition that the valve closes causes an abnormal high
operate the
pressure resulted in damage of the parts of the compressor and etc. and moreover if there is
unit with
leak of refrigerant at connecting section of pipes, the air is sucked and causes further
valves closed
abnormal high pressure resulted in burst or injury.
Only a qualified installer or qualified service person is allowed to relocate the air conditioner.
It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire,
electric shocks, injury, water leakage, noise and / or vibration may result.
Check the following items after reinstallation.
•
Check after
•
reinstallation
•
If check is not executed, a fire, an electric shock or an injury is caused.
When the service panel of the outdoor unit is to be opened in order for the compressor or the
area around this part to be repaired immediately after the air conditioner has been shut
down, set the circuit breaker to the OFF position, and then wait at least 10 minutes before
opening the service panel.
If you fail to heed this warning, you will run the risk of burning yourself because the
Cooling
compressor pipes and other parts will be very hot to the touch. In addition, before proceeding
check with the repair work, wear the kind of insulated heat-resistant gloves designed to protect
electricians.
Connect the pipes surely and there is no leak of refrigerant.
The valve is opened.
The earth wire is correctly connected.
The power cord is not caught in the product.
There is no inclination or unsteadiness and the installation is stable.
8