Toshiba MMU-AP0091H Installation of compressor, Vacuuming Case of single outdoor system, 203

Installation of compressor

•Install the compressor in the reverse procedure of removal.

•When removing the compressor, the terminals may become loose.

If this happens crimp them with pliers and then check there are no looseness. Note)

•Only two hexagonal bolts are provided to fix the compressor.

•The tightening torque of the hexagonal bolt to fix the compressor is 200kg/cm.

•If oil has been extracted from the accumulator, braze the cutoff pipe after pinching.

Vacuuming

In case of single outdoor system

•Connect vacuum pump to the valve charge ports on the liquid, gas pipes and the check joint on the high- pressure side and then vacuum.

•Vacuum until the vacuum low-pressure gauge indicates 1 (mmHg).

Note)

•Before vacuuming, open PMV1, 2 fully. Vacuuming of the outdoor heat exchanger will not occur if PMV 1 and 2 are closed.

In case of multiple outdoor unit systems

•In the case of conducting the refrigerant recovery at replacing the compressor, perform vacuuming as “13-3. Process after Repair ”.

Full opening of PMV1, PMV2

•Turn on the power to the outdoor unit.

•Confirm that Bit 1 on SW12 is OFF.

•Short CN30 on I/F P.C. board on the outdoor unit.

•Turn off the power to the outdoor unit within 2 minutes of short-circuiting.

Refrigerant charging

• Add the same amount of refrigerant as the remaining refrigerant from charge port of the liquid service valve.

203