PURGING PROCEDURES
Connect the refrigerant pipes (both liquid pipe and the gas pipe) between the indoor
and the outdoor unit.
Remove the service port cap of the stop valve on the side of the outdoor unit gas
pipe. (The stop valve will not work in it initial state fresh out of the factory (totally
closed with cap on).)
Connect the gauge manifold valve and the vacuum pump to the service port of the
stop valve on the gas pipe side of the outdoor unit.
Run the vacuum pump. (Vacuumize for more than 15 minutes.)
Check the vacuum with the gauge manifold valve, then close the gauge manifold
valve, and stop the vacuum pump.
Leave as it is for one or two minutes. Make sure the pointer gauge manifold valve
remains in the same position. Confirm that the pressure gauge shows–0.101 Mpa
[Gauge] (–760 mmHg).
Pipe length exceeding 7 m
Charge the prescribed amount
of gas. (refer to 3)
Remove the gauge manifold valve quickly from the service port of the stop valve.
After refrigerant pipes are connected and evacuated, fully open all stop valves on
both sides of gas pipe and liquid pipe.
Operating without fully opening lowers the performance and this causes trouble.
Tighten the cap to the service port to obtain the initial status.
Retighten the cap.
Leak test
*Close
*Open
Hexagonal wrench
Stop valve
*4 to 5 turns
Stop valve
(or the vacuum
pump with the
function to
prevent the
back flow)
Gauge manifold
valve (for R410A)
Pressure gauge
(for R410A)
Compound pressure
gauge (for R410A)
-0.101MPa
(-760 mmHg)
Handle
Low
Handle High
Window
Charge hose
(for R410A)
Vacuum
pump
Adapter for
preventing
the back flow
Charge hose
(for R410A)
Service port
Stop
valve
EMERGENCY
OPERATION switch
Mode Operation Indicator lamp
1
COOL
(Light)
(Off)
2
HEAT
(Off)
(Light)
3
STOP
(Off)
(Off)
6-4 PURGING PROCEDURES·LEAK TEST
PROCEDURE
•
Press the EMERGENCY OPERATION switch.
1
Press it once, and after test run for 30 minutes the EMERGENCY COOL MODE starts.
If the left side lamp of the operation indicator blinks every 0.5 seconds, inspect the
indoor/outdoor unit connecting wire
for mis-wiring.
2
Press it once more, and the EMERGENCY HEAT MODE starts.
3
Press it once more, and the operation stops.
(The operation mode changes in order of
1
~
3
every time the EMERGENCY
OPERATION switch is pressed.)
•
In starting the heating operation, indoor unit fan may not operate to prevent blowing
cool air. Please wait for a few minutes until the temperature of heat exchanger rises and
warm air blows out.
Checking the remote (infrared) signal reception
Press the ON/OFF button on the remote controller and check that an electronic sound is
heard from the indoor unit. Press the ON/OFF button again to turn the air conditioner off.
If the indoor unit is operated with the remote controller, both the test
run and the emergency operation are released by commands from
the remote controller.
•
Once the compressor stops, the restart preventive device operates so the compressor
will not operate for three minutes to protect the air conditioner.
6-6 EXPLANATION TO THE CUSTOMER
•
Using the OPERATING INSTRUCTIONS, explain the following to the customer, how to
control temperature, how to remove the air filters, how to remove or put the remote
controller in the remote controller holder, how to clean, precautions for operation, etc.
•
Recommend the customer to read the OPERATING INSTRUCTIONS carefully.
6-7 CHECKING AFTER INSTALLATION
After finishing the installation, check the following items and mark the
next to each item.
Is the specified power supply voltage used?
Is the power line equipped with the circuit breaker?
Have the ends of the indoor/outdoor connecting wire been properly inserted into the
terminal blocks?
Has the indoor/outdoor connecting wire been secured firmly?
Are the power supply cord and indoor/outdoor connecting wire connected directly to
the units (no intermediate connections)?
Is the earth wire longer than the other wires so that it will not become disconnected
when tension is applied?
Is the earth wire connected properly?
Are the pipes designed for use with R410A or do they have the specified thickness?
Has the leak test been carried out for the pipe connections?
Has air purging been carried out?
Are the stop valves open fully?
Is the drain hose properly installed?
Has water been poured through the drain hose to confirm proper drainage?
Are the pipes at the rear of the unit bundled with felt tape (for left and left-rear piping
only)?
Can the installation location bear the weight of the unit and not amplify its vibration or
noise?
Is the area under the unit free of objects that block the air outlet?
Are the vertical and horizontal vanes closed securely?
Is the front panel installed securely?
Has the test run been carried out?
Has the drain work been performed properly and are there no bubbling sounds?
Have all of the
WARNING and
CAUTION items in “1. THE FOLLOWING
SHOULD ALWAYS BE OBSERVED FOR SAFETY” been checked?
6-8 EXPLANATION TO THE CUSTOMER
•
Using the OPERATING INSTRUCTIONS, explain the following to the customer, how to
control temperature, how to remove the air filters, how to remove or put the remote
controller in the remote controller holder, how to clean, precautions for operation, etc.
•
Recommend the customer to read the OPERATING INSTRUCTIONS carefully.
6-5 TEST RUN
•
Before performing the test run, recheck any wrong wiring.
Wrong wiring prevents normal operation or results in blown fuse disabling operation.
•
The test run can be started by pressing EMERGENCY OPERATION switch. When the
EMERGENCY OPERATION switch is once pressed, the unit will start the test run
(continuous operation) for 30 minutes.
A thermostat does not work during this time. After 30 minutes the unit will start the
EMERGENCY OPERATION at a fixed temperature setting of 24°C in COOL MODE or
HEAT MODE.
•
Perform test run in the following procedure.
140 to 180
200 to 300
Tightening torque
N·m
kgf·cm
Cap for service port
Cap for stop valve
13.7 to 17.7
19.6 to 29.4
Pipe length up to 7 m
No gas charge is needed.
