General ................................................................................ 1
Inspection............................................................................. 1
Reference ............................................................................ 1
Approvals ............................................................................. 1
Nomenclature....................................................................... 2
INSTALLATION
Limitations............................................................................ 3
Handling ............................................................................... 3
Location ............................................................................... 3
Clearances........................................................................... 4
Compressor Hold-Down Nuts.............................................. 4
Discharge Line Hold-Down Bracket..................................... 4
Chilled Liquid Piping ............................................................ 4
Electrical Wiring ................................................................... 5
Power Wiring ................................................................ 5
Control Wiring ............................................................... 5
Multiple Units ................................................................ 5
Wiring To External Water Line Heaters ........................ 5
OPERATION
Checking Prior To Initial Start Up......................................... 8
Applying Power To The Unit................................................. 8
Sequence of Operation........................................................ 8
Compressor No. 1 Operation............................................... 8
Part-Winding Start ........................................................ 9
Pumpdown.................................................................... 9
Anti-Short Cycling......................................................... 9
Oil Failure ..................................................................... 9
High / Low Pressure Lockout ....................................... 9
Compressor No. 2 Operation............................................... 9
Part-Winding Start ........................................................ 9
Pumpdown.................................................................... 9
Anti-Short Cycling......................................................... 9
Oil Failure ..................................................................... 9
High / Low Pressure Lockout ....................................... 9
Water Cooler Freeze Prevention ....................................... 10
Compressor Motor Protection System .............................. 10
Condenser Fan Motor Control ........................................... 10
Electric Controls..................................................................11
MAINTENANCE
General .............................................................................. 12
Cleaning Condenser Surface ............................................ 12
Lubricating Fan Motors ...................................................... 12
Compressor Replacement................................................. 12
Secure Owner’s Approval .................................................. 12
TABLES
No. Description Page
1
Application Data..........................................
3
2
Physical Data..............................................
4
3
Electrical Data.............................................
6
4
Electrical Data (International Models) ........
6
5
Water Side Pressure Drop..........................
6
FIGURES
No. Description Page
1
Unit Handling ..............................................
3
2
Support Beam Locations ............................
4
3
Compressor Hold-Down Nuts.....................
4
4
Field Wiring Diagram ..................................
5
5
Unit Dimensions and Clearances ...............
7
6
Condenser Fans Orientation ......................
10
W
1
L
C
2
5
2
A
PRODUCT NOMENCLATURE
PRODUCT GENERATION
1 = New or Current
PRODUCT CATEGORY
W = Air-Cooled Chiller
PRODUCT IDENTIFIER
LC = Liquid Chiller
VOLTAGE CODE
25 = 208/230-3-60
40 = 380-3-60
46 = 460-3-60
50 = 380/415-3-50
NOMINAL COOLING
CAPACITY
420 = 429 MBH (35.8 Tons)
530 = 538 MBH (44.8 Tons)
FACTORY INSTALLED HEAT
A = Not Applicable
(Cooling only)
4
0
TABLE OF CONTENTS
570.05-N4Y
2
Unitary Products Group