Mitsubishi Electric MFZ-KA50VA / SUZ-KA50VA [10/24] 3 pipe connection

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5-4 TEST RUN

• 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 OP-

ERATION 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 OPERA-

TION at a fixed temperature setting of 24 °C in COOL MODE.

• Perform test run in the following procedure.

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.)

Note:

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

5-3 PIPE CONNECTION

Note:

Fasten a flare nut with a torque wrench as specified in the table below.

When fastened too tight, a flare nut may broken after a long period and cause a leakage of refrigerant.

Connect both liquid and gas pipings to indoor unit.

• Apply a thin coat of refrigeration oil J on the seat surface of pipe.

• For connection first align the center, then tighten the first 3 to 4 turns of flare nut.

• Use tightening torque table below as a guideline for indoor unit side union joint section, and tighten using

two wrenches. Excessive tightening damages the flare section.

mm N·m kgf·cm

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.