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RAUJ-C20
Trane RAUJ-C20 User Manual
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88
SS-SVX11K-EN
Compressor
Junction
Box
Figure
63.
Junction
box:
20-60
Ton
units
1A (& 2A, if present) J-Box Shown w/o Cover
Crankcase Heater
Wires
3B1HR12 (3B3HR14)
T1
Red
T3
T2
Blue
DLT Wire
4S76 (4S77)
DLT Wire
4S76 (4S77)
Control Box
Connection Wire
Power Wires from
Control Box
HPC Wires
4S1 (4S2)
Blk
Control Box
Connection Wires
Control Box
Connection Wires
Control Box
Connection Wires
1B (& 2B, if present) J-Box Shown w/o Cover
Power Wires from
Control Box
T3
T2
Blue
LPC Wires
4S3 (4S4)
Blu
Compr Protection
Switch Wires
4S5 (4S6)
Yel
Control Box
Connection Wires
T1
Red
Crankcase Heater
Wires
3B2HR13 (3B4HR15)
Control Box
Connection Wires
Control Box
Connection Wires
O
O
p
p
e
e
r
ra
a
t
t
i
i
n
n
g
g
P
P
r
r
i
i
n
n
c
c
i
i
p
p
l
l
e
e
s
s
87
89
Table of Contents
Default Chapter
4
Table of Contents
4
Model Number Description
7
20 To 60 Ton Units
7
80 To 120 Ton Units
8
General Information
9
Unit Inspection
9
Exterior Inspection
9
Damage
9
Repair
9
Nameplates
9
Unit Nameplate
9
Compressor Nameplate
9
EVP Chiller - Applications Only
9
Unit Protection
9
Manual Motor Protectors
10
Through 575V Only)
10
Discharge Line Thermostat
10
Unit Description
10
General Data
12
Dimensions and Weights
14
Unit Clearances
14
Unit Dimensions
16
Unit Weights
39
Installation Mechanical
40
Location Requirements
40
Isolation
40
Foundation
40
Leveling the Unit
40
Rigging and Lifting
40
Unit Mounting
43
Unit Isolation
44
Neoprene Isolators
44
Units)
44
Units)
45
Installation
46
General Unit Requirements
46
Refrigerant Piping
46
Requirements
46
Refrigerant Piping Components
46
Refrigerant Piping
49
Typical Field-Installed Evaporator Piping: Dual-Circuit Examples
51
Hot Gas Bypass for Commercial Comfort-Cooling Applications
52
Optional Pressure Gauges
52
Final Refrigerant Pipe
53
Connections
53
Brazing Procedures
53
Leak Testing Procedure
54
Installation Mechanical - EVP
55
EVP Chilled Water Piping
55
Requirements
55
TXV for Remote Chiller
55
Typical Field-Installed EVP Chiller
55
Evaporator Piping
55
Remote EVP Chiller
56
Water Treatment
56
Water Flow Limits
56
Water Temperature Limits
56
Short Water Loops
56
Chilled Water Piping
57
Final Water Piping Connections
60
Installation Electrical
61
Electrical
61
Wiring Requirements
63
Main Electrical Power
63
Requirements
63
Field Installed Control Wiring
63
Low Voltage Wiring (AC & DC)
64
Field Installed Power Wiring
64
Field Installed Control Wiring
66
EVP Chiller Control
82
Operating Principles
86
Component Locations
86
Condenser Fans
86
Compressors
87
Compressor Junction Box
88
Unit Operation
89
VAV W7100A Discharge Air
89
Controller (7U11)
89
Economizer Cycle
90
Chilled Water Temperature
90
Controller (6U11)
90
Thermostatic Expansion Valve
91
Condenser Fans
91
Low Ambient Dampers
92
Compressor Crankcase Heaters
92
Low Ambient Thermostats
93
Hot Gas Bypass Operation
93
Pre-Start
94
EVP Chiller Applications
94
System Evacuation Procedures
94
Standing Vacuum Test
95
Discharge Air Controller Checkout
96
(Honeywell W7100A)
96
Discharge Air Sensor Checkout
98
(Honeywell Sensor)
98
Economizer Actuator Checkout
98
EVP Chiller Control Checkout
99
W7100G)
100
Chilled Water Sensor Checkout
100
(Honeywell Sensor)
100
Master Energy Control Checkout
101
Zone Thermostat Checkout
102
T7067
102
Discharge Air Sensor Checkout
102
(Honeywell 6RT1)
102
Voltage Imbalance
104
Electrical Phasing
104
Start-Up
105
Low Ambient Damper Adjustment
105
(Factory or Field Installed)
105
EVP Chiller Applications
105
Freezestat Setting
105
Air Over" Evaporator Application
105
Rotation
105
System Airflow Measurement
106
Measuring Airflow
106
Alternate Method
106
Preliminary Expansion Valve
107
Adjustment
107
Adding Preliminary Charge
108
Compressor Start-Up(All Systems)
109
Motors Rotating Backward
112
Subcooling
113
Measuring Superheat
113
Compressor Oil
113
Compressor Crankcase
113
Heaters
113
Compressor Sequencing
114
Pressure Curves
114
Final System Setup
116
Maintenance
119
Monthly Maintenance
119
Air Handling Equipment
119
Condensing Unit
119
Coil Cleaning
120
Microchannel Condenser Coil Repair
120
And Replacement
120
EVP Remote Evaporator Chiller
120
Water Strainer Maintenance
120
EVP Evaporator Replacement
121
Water Loop
121
Scroll Compressor
121
Operational Sounds
121
Replacement
121
Charging
121
Compressor Replacement
122
CSHD Compressors
122
122
122
20 Ton
123
Suction Line Filter
125
Fuse Replacement Data
125
Fall Restraint - Condenser Roof
126
Warranty and Liability Clause
127
Commercial Equipment Rated 20 Tons
127
Accessories
127
Products Covered
127
5
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Trane RAUJ-C20 Specifications
General
Brand
Trane
Model
RAUJ-C20
Category
Air Conditioner
Language
English
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