Bohn BCU1005ABEX6C2 Service Manual
BNTSSTB
July 2009
5-30 HP TWO STAGE CONDENSING UNITS
AND SYSTEMS
Technical Guide
With Bitzer Compressors
www.thecoldstandard.com
TABLE OF CONTENTS
Standard Features ....................................................................................................................................................................................................................2
Nomenclature ............................................................................................................................................................................................................................ 2
Condensing Unit Capacity .................................................................................................................................................................................................... 3
Two Stage System Capacity .................................................................................................................................................................................................. 4
Two Stage Electrical Specications ....................................................................................................................................................................................5
Physical Specications
............................................................................................................................................................................................................ 6
Dimensional Diagrams .......................................................................................................................................................................................................... 6
Piping Diagram ........................................................................................................................................................................................................................ 7
STANDARD FEATURES
Condensing Unit
• Bitzer two stage compressor
• Discharge and suction vibration eliminators
• Discharge muer
• Encapsulated high pressure switch
• Adjustable low pressure switch with superhose
• Crankcase heater
• Compressor contactor w/circuit breaker
• Floating Tube™ coil design
• Flooded head pressure controls
• Pressure fan cycling (multiple fan units)
• Oil
separator - return line solenoid valve and time delay
• Mechanical subcooler
• Replaceable core liquid line lter drier
• Replaceable core suction lter
• Suction accumulator
• Crankcase pressure regulator
• Defrost timer
• Evaporator fan contactor
with fusing
• Defrost heater contactor
with fusing
• Anti short cycle timer
• Phase monitor
• Pumpdown switch
Evaporator
• Thermo-Flex™ coil design
• Thermostatic expansion valve factory installed
• Liquid line solenoid valve factory installed
• Low temperature motors
• Double wall insulated drain pan
• Adjustable defrost termination and fan delay
NOMENCLATURE
B
ModelCCompressor
B = Bohn C = Compound R = Remote
2
U
Unit
Construction
Condenser
U = Attached
Condenser
(Unit)
1
Comp.
Qty.
005
Total Comp.
HP
005 = 5 HP
008 = 8 HP
012 = 12 HP
016 = 16 HP
020 = 20 HP
025 = 25 HP
030 = 30 HP
A
CondenserBControl
A = Air
W = Water
Voltage
A = 115/1/60
B = 208-230/1/60
E
DefrostXTemp.
Range
E = Electric X = Ultra
Low
6
RefrigerantD Unit Voltage2Application
6 = R-404A/
R-507
©2009 Heatcraft Refrigeration Products, LLC
C = 208-230/3/60
D = 460/3/60
1 = Indoor
2 = Outdoor
CONDENSING UNIT CAPACITY
Two Stage
Unit Model
Number
BCU1005ABEX6*2 S4T-5.2Y
BCU1008ABEX6*2 S4N-8.2Y
BCU1012ABEX6*2 S4G-12.2Y
BCU1016ABEX6*2 S6J-16.2Y
BCU1020ABEX6*2 S6H-20.2Y
BCU1025ABEX6*2 S6G-25.2Y
BCU1030ABEX6*2 S6F-30.2Y
Compressor
Model
Suction
Temp.
°F
-40 18,730 18,450 18,170 17,900 17,640
-45 16,520 16,260 16,000 15,740 15,490
-50 14,500 14,260 14,010 13,770 13,530
-55 12,650 12,420 12,190 11,960 11,740
-60 10,960 10,740 10,520 10,310 10,100
-65 9,410 9,200 9,000 8,800 **
-40 26,600 26,200 25,800 25,400 25,000
-45 23,500 23,100 22,800 22,400 22,000
-50 20,600 20,300 19,960 19,610 19,240
-55 18,030 17,710 17,390 17,050 16,700
-60 15,630 15,340 15,030 14,710 14,380
-65 13,440 13,150 12,860 12,560 **
-40 42,500 41,800 41,100 40,400 39,700
-45 37,800 37,100 36,500 35,900 35,300
-50 33,400 32,800 32,300 31,700 31,200
-55 29,300 28,800 28,300 27,800 27,300
-60 25,600 25,100 24,700 24,200 23,700
-65 22,100 21,700 21,300 20,800 **
-40 59,500 56,800 57,600 56,700 55,700
-45 53,100 52,200 51,300 50,500 49,600
-50 47,100 46,300 45,500 44,700 43,900
-55 41,500 40,800 40,100 39,400 38,600
-60 36,300 35,700 35,100 34,400 33,700
-65 31,600 31,000 30,400 29,700 **
-40 68,700 67,600 66,400 65,300 64,200
-45 61,300 60,200 59,200 58,200 57,200
-50 54,300 53,400 52,500 51,600 50,700
-55 47,900 47,100 46,300 40,500 35,100
-60 42,000 41,200 40,500 39,700 38,900
-65 36,500 35,800 35,100 34,400 **
-40 78,500 77,100 75,800 74,500 73,200
-45 70,000 68,800 67,600 66,400 65,200
-50 62,100 61,000 60,000 58,900 57,800
-55 54,800 53,800 52,900 51,900 50,900
-60 48,000 47,200 46,300 45,400 44,400
-65 41,800 41,000 40,200 39,300 **
-40 93,000 91,400 89,700 88,100 86,500
-45 83,000 81,600 80,100 78,700 77,200
-50 73,700 72,400 71,200 69,900 68,600
-55 65,100 64,000 62,800 61,700 60,400
-60 57,100 56,100 55,100 54,000 52,800
-65 49,700 48,800 47,800 46,800 **
90°F
Amb.
95°F
Amb.
100°F
Amb.
105°F
Amb.
110°F
Amb.
NOTE: All capacities listed include liquid subcooling and are based upon sea level elevation pressure.
* C for 208-230/3/60, D for 460/3/60
** Out of Application Range
3
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