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Trane Rtaaiom3 Manual

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Page 1

LibraryService Literature
Product SectionRefrigeration
ProductRotary liquid Chillers – Air-Cooled
ModelRTAA
Literature TypeInstallation, Operation, Maintenance
Sequence3
DateDecember 1991
File No.SV-RF-RLC-RTAA-IOM-3-1291
Supersedes
Installation RTAA-IOM-3
Operation
Maintenance
Since The Trane Company has a policy of continuous product improvement, it reserves the right to change
specifications and design without notice. The installation and servicing of the equipment referred in this booklet
should be...

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©American Standard Inc. 1991 

Page 3

3RTAA-IOM-3 

Page 4

4RTAA-IOM-3
77 Operating Principles -
Mechanical
77 General
77 Refrigeration (Cooling) Cycle
77 — Cycle Description
77 — Compressor Description
77 — Compressor Motor
77 — Compressor Rotors
77 — Compressor Loading Sequence
82 Oil System Operation
82 — Overview
82 — Domestic Water Heater
83 — Oil Separator
83 — Compressor Bearing Oil Supply
83 — Compressor Rotor Oil Supply
84 — Slide Valve Movement
84 — Oil Filter
84 —Condenser Fans
87 Operating Principles -Adaptive
Control™ Microprocessor Logic87 General...

Page 5

5RTAA-IOM-3
37 Figure 18
Spring Isolator Placement for
Typical RTAA Packaged Unit
- 130 to 200 Tons
38 Figure 19
Spring Isolator Placement for
Typical RTAA Packaged Unit
 -240 to 400 Tons
39 Figure 20
Spring Isolator Placement for
Typical RTAA Outdoor Unit with
Remote Evaporator Option
 40 Figure 21
Spring Isolator Placement for
Typical RTAA Unit with Heat
Recovery Domestic Water Heater
41 Figure 22
Suggested Piping for Typical RTAA
Evaporator
43 Figure 23
RTAA 130 thru 400 Evaporator
Water Pressure...

Page 6

6RTAA-IOM-3
64 Figure 36
Typical Field Wiring for Outdoor
Unit with Remote Evaporator
Option
70 Figure 37
Alarm/Running/Maximum
Capacity Contact Outputs
72 Figure 38
Resistor and Potentiometer
Arrangement for External Chilled
Water Setpoint
73 Figure 39
Resistor and Potentiometer
Arrangement for External Current
Limit Setpoint
78 Figure 40
Refrigeration System and Control
Components - Single Circuit
80 Figure 41
Refrigeration System and Control
Components - Duplex Circuit
81 Figure 42
Typical RTAA...

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7RTAA-IOM-3
16 Table 1
General RTAA Mechanical
Specifications
17 Table 2
RTAA Refrigerant Circuit
Designations and Capacities
51 Table 3
RTAA Circuit Capacities
51 Table 4
Liquid Line Size for Horizontal and/
or Downflow Lines
51 Table 5
Equivalent Lengths of Non-Ferrous
Valves and Fittings
53 Table 6
Suction Line Size for Horizontal
and/or Upflow Lines
53 Table 7
Suction Line Size for Horizontal
and/or Downflow Lines
56 Table 8
System Refrigerant Charge
56 Table 9
Field-installed Piping Charge
67 Table...

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8RTAA-IOM-3 

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9RTAA-IOM-3
Literature Change History
RTAA-IOM-3 (October 1991)
Original manual. Covers installation,
operation, and maintenance of “CO”
design sequence RTAA-130 thru
RTAA-400 units.
Unit Identification
When the unit arrives, compare all
nameplate data with ordering and
shipping information.
Unit Inspection
When the unit is delivered, verify that it
is the correct unit and that it is property
equipped. Compare the information
which appears on the unit nameplate
with the ordering and submittal...

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10RTAA-IOM-3
Commonly Used
Acronyms
Acronyms used in this manual are
defined below.
OAT = Outdoor Air Temperature
BAS = Building Automation System
BCL = Bidirectional  Communications
Link
CAR = Circuit Shutdown, Auto Reset
CLS = Current Limit Setpoint
CMR = Circuit Shutdown, Manual
Reset
CWR = Chilled Water Reset
CWS = Chilled Water Setpoint
DDT = Design  Delta-Temperature
Setpoint (i.e., the difference
between entering and leaving
chilled water temperatures)
ENT = Entering Chilled Water
Temperature
EXV...
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