Purging Procedures·leak Test; Test Run - Mitsubishi Electric MS-GA60VB Series Installation Manual

Pipe diameter Tightening torque
mm N·m
6.35 13.7 to 17.7 140 to 180
9.52 34.3 to 41.2 350 to 420
15.88 73.5 to 78.4 750 to 800
2 Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the same manner applied for
indoor unit.
•
For tightening, use a torque wrench or spanner and use the same tightening torque
applied for indoor unit.
INSULATION AND TAPING
1 Cover piping joints with pipe cover.
2 For outdoor unit side, surely insulate every piping including valves.
3 Using piping tape G, apply taping starting from the entry of outdoor unit.
•
Stop the end of piping tape G with tape (with adhesive agent attached).
•
When piping have to be arranged through above ceiling, closet or where the
temperature and humidity are high, wind additional commercially sold insulation for
prevention of condensation.
6-4 PURGING PROCEDURES·LEAK TEST
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 its 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. Confi rm that the pressure gauge shows–0.101 Mpa
[Gauge] (–760 mmHg).
Close
Stop valve
Open
Hexagonal wrench
Precautions when using the control valve
Service port
A
Control Valve
Open
Close
Charge hose
Body
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.
Pipe length up to 7 m
No gas charge is needed.
Tighten the cap to the service port to obtain the initial status.
Retighten the cap.
kgf·cm
Stop valve
Liquid pipe
Gauge manifold valve
Stop valve
Charge
Service port
hose
Vacuum pump
When attaching the control valve to the
service port, valve core may deform or
loosen if excess pressure is applied.
This may cause gas leak.
When attaching the control valve to the
service port, make sure that the valve core
is in closed position, and then tighten part A.
Do not tighten part A or turn the body when
valve core is in open position.
Pipe length exceeding 7 m
Charge the prescribed amount
of gas. (refer to 3)
Leak test
Cap for service port
Cap for stop valve

6-5 TEST RUN

MS Type
•
Before performing the test run, recheck for 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 fi xed temperature setting of 24 °C in COOL MODE.
•
Perform test run in the following procedure.
PROCEDURE
•
Press the EMERGENCY OPERATION switch.
1 Press it once, and after test run for 30 minutes the EMERGENCY COOL MODE starts.
2 Press it once more, and the operation stops.
((The operation mode alternates between 1 and 2 every time the EMERGENCY
OPERATION switch is pressed.)
Mode Operation Indicator lamp
1 COOL
(Light)
2 STOP
(Off)
MSH Type
•
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 fi xed temperature setting of 24°C in COOL MODE
or HEAT MODE.
•
Perform test run in the following procedure.
PROCEDURE
•
Press the EMERGENCY OPERATION switch.
1 Press it once, and after test run for 30 minutes the EMERGENCY COOL MODE starts.
Hexagonal
wrench
If the left side lamp of the operation indicator blinks every 0.5 seconds, inspect
the indoor/outdoor unit connecting wire A for mis-wiring.
Gas pipe
Caps
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.)
Mode Operation Indicator lamp
1 COOL
(Light)
2
HEAT
(Off)
3 STOP
(Off)
•
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.
MS Type and MSH Type
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 fi lters, 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.
Tightening torque
N·m
13.7 to 17.7
19.6 to 29.4
(Off)
(Off)
(Off)
(Light)
(Off)
kgf·cm
140 to 180
200 to 300
EMERGENCY
OPERATION switch
EMERGENCY
OPERATION switch