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FORM 145.15-IOM7 (412)
22 JOHNSON CONTROLS
START-UP AND OPERATION
Start unit and check rotation of fans and compressors.
Scroll compressors will only compress in one
rotational direction. Three phase compressors will
rotate in either direction depending upon phasing of
the power. Since there is a 50-50 chance of
connecting power in such a way as to cause rotation
in the reverse direction, it is important to ensure
proper rotation direction is achieved when the
system is installed and operated.
Monitor the microprocessor board for any fault codes.
This will ensure proper unit operation. Verification of
proper compressor direction is made by observing
that suction pressure drops and discharge pressure
rises when the compressor is energized. Reverse
compressor rotation also results in an elevated sound
level as well as substantially reduced current draw.
The Air Conditioning section of this
equipment is charged with R-410A; a
hi-pressure refrigerant. Only qualified
technicians, using appropriately
pressure-rated test instruments,
should perform troubleshooting or
service on this equipment.
Pressure Switch Settings - All Models
High Low
Cut Out (PSIG) 600 50
Cut In (PSIG) 450 75
Refrigerant Charge (LBS)
UNIT
Circuit 1 Circuit 2
CSV060B 5.25 (5 lbs 4 oz) -
CSV096B 5.18 (5 lbs 3 oz) 5.30 (5 lbs 5 oz)
CSV120B 6.12 (6 lbs 2 oz) 6.25 (6 lbs 4 oz)
CSV180B 8.69 (8 lbs 11oz) 9.12 (9 lbs 2 oz)
CSV240B 12.45 (12 lbs 7 oz) 12.45 (12 lbs 7 oz)
There is no negative impact on durability caused by
operating three phase Scroll compressors in the
reversed direction for a short period of time (under
one hour). However, after several minutes of
operation the compressors internal protector will trip.
If opposite rotation is needed, disconnect and reverse
any two leads of the three phase supply. Reconnect
power.
Observe unit operation and check for
unusual noise or vibration.