Trane CGA-SVX01A-EN Installation, Operation And Maintenance Manual

CGA-SVX01A-EN

Installation
Operation
Maintenance

Air-Cooled Cold Generator
Air-Cooled Cold Generator

With Heat Pump Option

®

®

© American Standard Inc. 2001 CGA-SVX01A-EN

2

MODEL NOMENCLATURE
INSTALLATION

RIGGING
MOUNTING
WATER PIPING

FIGURE 1: RECOMMENDED HOISTING ARRANGEMENT
FIGURE 2: DIMENSION FOR MOUNTING

FIGURE 3: SERVICE & MAINTENANCE CLEARANCE
ELECTRICAL WIRING
UNIT POWER SUPPLY

FIGURE 4: TYPICAL PIPING ARRANGEMENT

FIGURE 5: TYPICAL SYSTEM APPLICATION

ELECTRICAL DATA
FLOW SWITCH INTERLOCK

CIRCUIT DIAGRAM FOR CGAK 030 - 075

CIRCUIT DIAGRAM FOR CGAR 030 - 075

CIRCUIT DIAGRAM FOR CGAK 100 - 200

CIRCUIT DIAGRAM FOR CGAR 100 - 150
INSTALLATION CHECKLIST

PRE-START PROCEDURE

VOLTAGE UTILIZATION RANGE
VOLTAGE IMBALANCE
WATER FLOW RATE
UNIT WATER PRESSURE DROP

FIGURE 6: HYDRAULIC CHARACTERISTIC
PRE-START CHECKLIST

OPERATION

START-UP PROCEDURE
EXTENDED UNIT SHUT-DOWN/WINTERIZATION
STANDARD AMBIENT OPERATION
OPTIONAL LOW AMBIENT OPERATION (CGAK)
OPTIONAL HEAT PUMP OPERATION (CGAR)
ELECTRICAL CONTROL & PROTECTION SYSTEM

MAINTENANCE
TROUBLE ANALYSIS

TABLE OF CONTENTS

3
4

11
12

17

22

26
27

3

CGA
1,2,3

K4050

5,6,7

58D9F10R11M12R13N14A

15

CGA-SVX01A-EN

MODEL NOMENCLATURE

DIGIT 1,2,3

CGA=Air-Cooled Cold Generator

®

DIGIT 4 - Model

K=Cooling Only (030~200)
R=Cooling With Heat Pump Option (030~150)

DIGIT 5,6,7 - Number

030
040
050
075
100
125
150
175
200

DIGIT 8 - Voltage

1=220V/60Hz/1Ph
(For model 030,040,050)
2=220V/60Hz/3Ph
(For model 050,075,100,125,150, 175, 200)
3=380V/60Hz/3Ph
(For model 050,075,100,125,150, 175, 200)
4=460V/60Hz/3Ph
(For model 050,075,100,125,150, 175, 200)
5=380V/50Hz/3Ph
(For model 050,075,100,125,150, 175, 200)
6=400V/50Hz/3Ph
(For model 050,075,100,125,150, 175, 200)
7=415V/50Hz/3Ph
(For model 050,075,100,125,150, 175, 200)

DIGIT 9 - Development Sequence

D=Fourth Design

DIGIT 10 - Controls

F=Fixed Entering Water Temperature Control
(Standard Option)
A=Adjustable Entering Water Temperature
Control
(Microprocessor Controller)
(For CGAK Models as Optional)
(For CGAR Models as Standard Option)

DIGIT 11- Water Pump

N = No Pump
R = Standard Pump
(Standard Option)

DIGIT 12 - Refrigerant Pressure Gauges

M = No
(Standard Option)
G = With High/Low Pressure Gauges

DIGIT 13 - Temperature Kit

R = Standard Ambient Temperature Kit
(Standard Option)
L = Low Ambient Temperature Kit
(For CGAK Models Only)

DIGIT 14 - Other Options

M = Standard Fin + Standard Grille Cover
N = Standard Fin + Luxury Grille Cover
C = Blue Fin + Standard Grille Cover
B = Blue Fin + Luxury Grille Cover

DIGIT 15 - Service Sequence

A = First

© American Standard Inc. 2001

4

INSTALLATION

Table 1 - Unit Shipping Weights

Maximum Shipping Weight (Kg)

230
250
260
370
450
500
530
550
570

Model

030
040
050
075
100
125
150
175
200

CGA-SVX01A-EN

Complete the “Installation Checklist” during
installation to verify completion of all
recommended procedures before unit
start-up.

RIGGING

Each unit is bolted to a shipping skid for
shipment to the job site. Move the unit using
a forklift of suitable capacity. See Table 1 for
unit shipping weights.

Locate the unit near a large-capacity drain to
allow system drainage during unit shutdown
and repair. Rig the unit using canvas belt.
Fasten the belt to the unit over the unit’s
base as show in Figure 1.

MOUNTING

Mounting methods that will minimize sound
and vibration problems are:

1. Mount the unit directly on an isolated
concrete pad or on isolated concrete
footings at each unit mounting point.

2. Install the optional neoprene or spring
isolators at each mounting location.

Refer to Figure 2 for unit and base
dimensions and Figure 3 for recommended
service clearance.

WATER PIPING

Thoroughly flush all water system piping
before making the final piping connections to
the unit.

5

Figure - 1:
Recommended Hoisting Arrangement
(CGAK-075 As Shown)

CGA-SVX01A-EN

© American Standard Inc. 2001

6

Figure - 2:
Dimension for Mounting
(CGAK-075 As Shown)
Note: All Dimensions in Millimeter

CGA-SVX01A-EN

7

Figure - 3:
Service and Maintenance Clearance
(CGAK-075 As Shown)

CGA-SVX01A-EN

© American Standard Inc. 2001

8

CGA-SVX01A-EN

CAUTION: If using an acidic commercial
flushing solution, construct a temporary
bypass around the unit to prevent
damage to the evaporator.

CAUTION: To avoid possible equipment
damage, do not use untreated or
improperly treated water.

For unit’s water connection sizes and
locations, please refer to Figure 2.

CAUTION: To prevent unit damage, do
not reverse system piping connections to
the unit; water entering the unit must
enter at the designated “Water In” and
leaving water must exit the unit through
the designated “Water Out” connection.

Figure 4 illustrates typical unit piping
components. Components and layout will
vary slightly depending upon the locations
of the connections and water source.

Figure 5 gives a schematic of a typical
system application for this unit.

Provide vents at high points in the piping to
bleed air from the chilled water system.
Install pressures gage(s) to monitor entering
and leaving chilled water pressure.

CAUTION: To prevent damage to the
waterside components of unit, do not
allow evaporator pressure to exceed 100
psig (i.e. maximum working pressure).
Use an expansion tank to isolate this
pressure if water pressure exceeds this
value.

ELECTRICAL WIRING

WARNING: To prevent injury or death,
disconnect electrical power source
before completing wiring connections to
the unit.

CAUTION: Use only copper conductors
for terminal connections to avoid
corrosion or over heating.

Figure 2 shows the location of the unit
electrical access openings. Table 2 provides
minimum circuit ampacities, recommended
fuse sizes, and motor electrical data.

UNIT POWER SUPPLY

Refer to the unit wiring schematic fixed to
the control panel cover. The installer must
provide a power supply of proper voltage
and a fused disconnect switch to the unit.

Run properly sized power wirings through the
electrical access opening on the side of the
unit, and connect it to the Voltage Terminal
Block (1TB1) in the unit control panel. Install
a fused disconnect switch as required by
local codes. Provide proper equipment
grounds for the ground connections in the
unit control panel and at the fused disconnect
switch.

Refer to wiring diagrams from Page 13 to
Page 16 for reference of a typical unit installa­tion. For actual wiring diagram, refer to the
one fixed to the control panel cover.

FLOW SWITCH INTERLOCK

To avoid possible evaporator freeze-up
resulting from reduced water flow, install a
flow switch ( or other flow sensing device) in
the evaporator outlet water line. This sensing
device must be adjusted to stop compressor
operation if water flow to the evaporator
drops below 70% of the system design full­flow rate.

The installer must provide interconnecting
wiring between the unit control panel and the
water flow sensing switch in the evaporator
water line.

9

Figure - 4:
Typical Piping Arrangement
(CGAK-075 As Shown)

CGA-SVX01A-EN

© American Standard Inc. 2001

10

Figure - 5:
Typical System Application
(CGAK-075 And Fans As Shown)

CGA-SVX01A-EN