Compressors; Phasing - Johnson Controls BUQ024 Installation Manual

527929-BIM-F-0911
Table 6: BUQ024-060 Physical Data (Continued)
Component
Nominal Tonnage
Refrigerant control
CONDENSER FAN DATA
Quantity of fans
Fan diameter (Inch)
Type
Drive type
Quantity of motors
Motor HP each
No. speeds
RPM
Nominal total CFM
DIRECT DRIVE EVAP FAN DATA
Quantity
Fan Size (Inch)
Type
No. speeds
Motor HP each
RPM
Frame size
FILTERS
Quantity - Size

Compressors

The scroll compressor used in this product is specifically
designed to operate with R-410A Refrigerant and cannot be
interchanged.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system.
The compressor also uses a polyolester (POE oil), Mobil 3MA
POE. This oil is extremely hydroscopic, meaning it absorbs
water readily. POE oil can absorb 15 times as much water as
other oils designed for HCFC and CFC refrigerants. Take all
necessary precautions to avoid exposure of the oil to the
atmosphere.
Do not leave the system open to the atmosphere. Unit
damage could occur due to moisture being absorbed by
the POE oil in the system. This type of oil is highly
susceptible to moisture absorption
POE (polyolester) compressor lubricants are known to cause
long term damage to some synthetic roofing materials.
12
BUQ024 BUQ030 BUQ036
2.0 2.5
TXV TXV
1 1
22 22
Prop Prop
Direct Direct
1 1
1/3 1/3
1 1
1100 1100
2000 2400
1 1
10 x 8 10 x 8
Centrifugal Centrifugal Centrifugal
1 1
1/2 1/2
Variable Variable Variable
48 48
2 - 22 x 14 x 1 2 - 22 x 14 x 1 2 - 22 x 14 x 1 2 - 22 x 14 x 1 2 - 22 x 14 x 1 2 - 22 x 14 x 1
Models
BUQ042 BUQ048
3.0 3.5 4.0
TXV TXV TXV
1 1 1
22 22 22
Prop Prop Prop
Direct Direct Direct
1 1 1
1/3 1/3 1/3
1 1 1
1100 1100 1100
2400 3200 3200
1 1 1
11 x 10 11 x 10 11 x 10
Centrifugal Centrifugal
1 1 1
3/4 3/4 3/4
Variable Variable
48 48 48
Exposure, even if immediately cleaned up, may cause
embrittlement (leading to cracking) to occur in one year
or more. When performing any service that may risk
exposure of compressor oil to the roof, take precautions
to protect roofing.
Procedures which risk oil leakage include, but are not limited to,
compressor replacement, repairing refrigerant leaks, replacing
refrigerant components such as filter drier, pressure switch,
metering device or coil.
Units are shipped with compressor mountings which are factory
adjusted and ready for operation.
Do not loosen compressor mounting bolts.

Phasing

Three-phase, scroll compressors operate in only one direction.
If the scroll is drawing low amperage, has similar suction and
discharge pressures, or is producing a high noise level, the
scroll is misphased. Change the incoming line connection
phasing to obtain the proper rotation.
Scroll compressors require proper rotation to operate
properly. Failure to check and correct rotation may result
in property damage.
BUQ060
5.0
TXV
1
22
Prop
Direct
1
1/2
1
1100
3400
1
11 x 10
Centrifugal
1
1
Variable
48
Johnson Controls Unitary Products