268723-BIM-C-0908
12
Johnson Controls Unitary Products
Compressors
The scroll compressor used in this product is specifically
designed to operate with R-410A Refrigerant and cannot be
interchanged.
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.
POE (polyolester) compressor lubricants are known to cause
long term damage to some synthetic roofing materials.
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.
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.
CONDENSER FAN DATA
Fan diameter (Inch)
22
22
22
22
22
22
Type
Prop
Prop
Prop
Prop
Prop
Prop
Drive type
Direct
Direct
Direct
Direct
Direct
Direct
No. speeds
1
1
1
1
1
1
Number of motors
1
1
1
1
1
1
Motor HP each
1/4
1/4
1/4
1/4
1/4
1/2
RPM
850
850
850
850
850
1100
Nominal total CFM
1800
1800
2400
2400
3000
3000
DIRECT DRIVE EVAP FAN DATA
Quantity
1
1
1
1
1
1
Fan Size (Inch)
10 x 8
10 x 8
11 x 10
11 x 10
11 x 10
11 x 10
Type
Centrifugal
Centrifugal
Centrifugal
Centrifugal
Centrifugal
Centrifugal
No. speeds
5
5
5
5
5
5
Motor HP each
1/2
1/2
3/4
3/4
3/4
1
RPM
Variable
Variable
Variable
Variable
Variable
Variable
Frame size
48
48
48
48
48
48
FILTERS
Quantity - Size
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
Table 6:
Physical Data (Continued)
Component
Models
BUZ024
BUZ030
BUZ036
BUZ042
BUZ048
BUZ060
Nominal Tonnage
2.0
2.5
3.0
3.5
4.0
5.0
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system.
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
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.
Do not loosen compressor mounting bolts.
Scroll compressors require proper rotation to operate
properly. Failure to check and correct rotation may result
in property damage.
