Lubricant Adjusting Procedure For Compressor Replacement

LUBRICANT


Lubricant Adjusting Procedure for Compressor Replacement

1. Drain lubricant from removed compressor and measure lubricant amount.
1. Remove drain plug (A). Drain lubricant while rotating magnet clutch.





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2. Tighten drain plug to the specified torque when lubricant does not come out.

Drain plug tightening torque : 9.8 Nm (1.0 kg-m, 87 in-lb)

3. Drain lubricant from high-pressure port (B) and low-pressure port (C) while rotating magnet clutch.
4. Measure total amount of lubricant that is drained from removed compressor.





2. Drain lubricant from a new compressor that is calculated according to the following conditions.

Amount to be drained (A) [ml (US fl oz., Imp fl oz.)] = F - (D + S + R + a)

F : Lubricant amount that a new compressor contains [150 (5.1, 5.3)]
D : Lubricant amount that is drained from removed compressor
S : Lubricant amount that remains inside of removed compressor [20 (0.7, 0.7)]

R : Lubricant amount to be added according to components that are removed except compressor
a: (infinity symbol) : Lubricant amount that is recycled together with refrigerant during recycle operation

R : Lubricant amount to be added according to components that are removed except compressor
α
: Lubricant amount that is recycled together with refrigerant during recycle operation

CAUTION:
If lubricant amount that is drained from removed compressor is less than 60 m (2.0 US fl oz., 2.1
Imp fl oz.), perform calculation by setting "D" as 40 m (1.4 US fl oz., 1.4 Imp fl oz.).





Example: Lubricant amount to be drained from a new compressor when replacing compressor and liquid tank [ml (US fl oz., Imp fl oz.)] [D = 60 (2.0, 2.1), Lubricant amount removed during refrigerant recycling = 5 (1.4, 1.4)]
150 (5.1, 5.3) - [60 (1.5, 1.6) + 20 (0.7, 0.7) + 15 (0.5, 0.5) + 5 (0.2, 0.2)] = 50 (1.7, 1.8)
3. Install compressor and check the operation.