Outdoor Unit; Purging Air And Checking Gas Leakage - Daikin MTKY50UV16V3A Operation Manual

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Table of Contents

Purging Air And Checking Gas Leakage

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WARNING -------------------------

• Do not mix any substance other than the specified refrigerant (R32) into the refrigeration cycle.

• When refrigerant gas leaks occur, ventilate the room as soon and as much as possible.

• To prevent air pollution, a vacuum pump should be used for air purging wherever possible.

• If using additional refrigerant, perform air purging from the refrigerant pipes and

indoor unit using a vacuum pump, then charge additional refrigerant.

• Use a hexagonal wrench to operate the stop valve rod.

• All refrigerant pipe joints should be tightened with a torque wrench at the

specified tightening torque.

1) Connect projection side (on which pin is pressed) of charging hose (which comes from gauge

manifold) to gas stop valve's service port.

2) Fully open gauge manifold's low-pressure valve (Lo) and completely close its high-pressure valve (Hi).

(High-pressure valve subsequently requires no operation.)

3) Do vacuum pumping and make sure that the compound pressure gauge reads -0.1 MPa (-76cmHg) *1.

4) Close gauge manifold's low-pressure valve (Lo) and stop vacuum pump.

(Keep this state for a few minutes to make sure that the compound pressure gauge pointer does not swing back.) *2.

5) Remove valve cap from liquid stop value and gas stop valve.

6) Tum the liquid stop valve's rod 90 degrees counterclockwise with a hexagonal wrench to open valve. Close it after 5 seconds, and check for gas leakage.

Using soapy water, check for gas leakage from indoor unit's flare and outdoor unit's flare and valve rods.

After the check is complete, wipe all soapy water off.

7) Disconnect charging hose from gas stop valve's service port, then fully open liquid and gas stop valves. (Do not attempt to tum valve rod beyond its stop.)

8) Tighten valve caps and service port caps for the liquid and gas stop valves with a torque wrench at the specified torques.

•1. Pipe length vs. vacuum pump run time

Pipe length I Up to 1 Sm

Run time

Not less than 10 min. I Not less than 15 min.

Wiring

• For inter-unit wires connections, see ( INDOOR UNIT).

Terminal

· '

block

�

• Regarding the interconnecting

and power cables.

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WARNING ---

Never use short cables for

connecting end of conductor to

each other.

;JI Drain Work

1) Use the @ drain socket for drainage.

2) When attaching the @ drain socket to the bottom frame, make sure the connect the drain hose to the drain socket first.

3) If the drain port is covered by a mounting base or floor surface, place additional foot bases of at leaset 30mm in height under the outdoor unit's feet.

4) In cold areas, do not use a drain hose with outdoor unit. (Drain water may freeze. impairing heating performance.)