30HXA,HXC076-186
Water-Cooled and Condenserless Chillers
50/60 Hz
Installation Instructions
CONTENTS
IMPORTANT: This equipment generates, uses, and can
radiate radio frequency energy. If not installed and
used in accordance with these instructions, this equip-
ment may cause radio interference. The equipment has
been tested and found to comply with the limits of a
Class A computing device as defined by the FCC
(Federal Communications Commission, U.S.A.) Regu-
lations, Subpart J of Part 15, which are designed to
provide reasonable protection against such interfer-
ence when operated in a commercial environment.
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
Step 1 — Inspect Shipment . . . . . . . . . . . . . . . . . . . 1
Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . . . . 1
Step 3 — Piping Connections . . . . . . . . . . . . . . . . . 9
• COOLER FLUID, VENT, AND DRAIN
• BRINE UNITS
• PREPARATION FOR YEAR-ROUND
OPERATION
• 30HXA REFRIGERANT PIPING
• 30HXC CONDENSER CONNECTIONS
• INSTALL PRESSURE RELIEF REFRIGERANT
VENT PIPING
Step 4 — Make Electrical Connections . . . . . . . 14
• FIELD POWER CONNECTIONS
• FIELD CONTROL POWER CONNECTIONS
Step 5 — Install Accessories . . . . . . . . . . . . . . . . 26
• ELECTRICAL
• 30HXA LOW-AMBIENT OPERATION
• MINIMUM LOAD ACCESSORY
• MISCELLANEOUS ACCESSORIES
Step 6 — Leak Test Unit . . . . . . . . . . . . . . . . . . . . . 26
• 30HXC UNITS
INSTALLATION
Step 1 — Inspect Shipment — Inspect unit for dam-
age upon arrival. If damage is found, file a claim with the
shipping company right away. Do not store units in an area
exposed to weather because of sensitive control mecha-
nisms and electronic devices.
Locate unit indoors. When considering unit location, con-
sult National Electrical Code (NEC, U.S.A.) and local code
requirements. Allow sufficient space for wiring, piping, and
service. Install unit in an area which will not be exposed to
subfreezing weather. See Fig. 1-4 for clearance details.
Allow the following clearances for service access:
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ft (914 mm)
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ft (914 mm)
Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ft (610 mm)
Ends . . . . . . . . . . . . . . . tube removal at one (either) end;
3 ft (914 mm) at opposite end.
• 30HXA UNITS
Step 7 — Refrigerant Charge . . . . . . . . . . . . . . . . 26
• 30HXC UNITS
• 30HXA UNITS
Be sure surface beneath the unit is level and is capable of
supporting the operating weight of the unit. See Fig. 5 and
Tables 1A and 1B for unit operating weights. If necessary,
add supporting structure (steel beams or reinforced concrete
slabs) to floor to transfer weight to nearest beams.
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can
be hazardous due to system pressures, electrical compo-
nents, and equipment location. Only trained, qualified
installers and service mechanics should install, start up, and
service this equipment.
Step 2 — Rig and Place Unit
When working on the equipment, observe precautions in
the literature, and on tags, stickers, and labels attached to the
equipment.
Rig unit from the top heat exchanger only. Rigging from
the bottom heat exchanger will cause the unit to be lifted
unsafely. Personal injury or damage to the unit may
occur.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling, rigging, and setting bulky
equipment.
Do not remove unit from skid until unit is in its
final location. Rig from the rigging holes provided in the top
heat exchanger. See Fig. 1-5 for rigging and center of grav-
ity information. Lower the unit carefully onto the floor or
roller. Push or pull only on the skid, not the unit. If the
unit is moved on rollers, use a minimum of 3 evenly-spaced
rollers.
INTRODUCTION
These instructions cover installation of 30HX liquid chill-
ers with electronic controls and units with factory-installed
options (FIOPSs).
Copy continued on page 9.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
PC 903
Catalog No. 563-052
Printed in U.S.A.
Form 30HX-1SI
Pg 1
5-96
Replaces: New
Tab 5c
Download from Www.Somanuals.com. All Manuals Search And Download.
NOTES:
1.
DIMENSIONS — in. (mm)
Denotes center of gravity.
UNIT
A
B
C
D
E
2. Dimensions are in inches. Dimensions ( ) are in millimeters.
3. Recommended service clearance around unit (front, back, and one side) is
36Љ (914).
30HXC
72.12
50.63
(1286)
2.00
(51)
63.50
(1588)
31.00
(787)
161
171
186
(1832)
61.37
61.37
(1559)
2.00
(51)
63.50
(1588)
31.00
(787)
LEGEND
(1559)
K.O.
THK
TYP
—
—
—
Knockout
Thick
Typical
61.37
61.37
(1559)
2.00
(51)
63.50
(1588)
31.00
(787)
(1559)
Fig. 2 — Base Unit Dimensions, 30HXC161-186 Units
3
Download from Www.Somanuals.com. All Manuals Search And Download.
LEGEND
Knockout
K.O.
SAE
—
—
Society of Automotive
Engineers, U.S.A.
Thick
THK
TYP
—
—
Typical
NOTES:
1.
Denotes center of gravity.
2. Dimensions are in inches. Dimensions ( ) are in millimeters.
3. Recommended service clearance around unit (front, back, and one side) is
36Љ (914).
DIMENSIONS — in. (mm)
UNIT
30HXA
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
T
U
V
102.12 45.87 45.87
27.81 9.36 43.50 15.60 85.15 4.00
95.00 65.22 13.93 59.48 5.72 45.81 46.25 2.40 46.40 35.00
076
086
096
106
116
126
136
146
(2594) (1165) (1165) (706) (236) (1105) (396) (2163) (102) (2413) (1657) (354) (1511) (145 ) (1164) (1175) (61) (1179) (889)
102.12 45.87 45.87 27.81 9.36 43.50 15.60 85.15 4.00 95.00 65.22 13.93 59.48 5.72 45.81 46.25 2.40 46.40 35.00
(2594) (1165) (1165) (706) (236) (1105) (396) (2163) (102) (2413) (1657) (354) (1511) (145) (1164) (1175) (61) (1179) (889)
102.12 37.63 54.12 27.81 9.36 43.50 15.60 85.15 4.00 95.00 65.22 22.15 42.77 5.72 54.06 38.00 2.40 46.40 35.00
(2594) (956) (1375) (706) (236) (1105) (396) (2163) (102) (2413) (1657) (563) (1086) (145) (1373) (965) (61) (1179) (889)
102.12 37.63 54.12 28.41 10.28 45.50 15.60 85.15 5.00 95.00 67.22 22.15 42.77 5.87 54.06 38.00 2.40 46.40 35.00
(2594) (956) (1375) (721) (261) (1156) (396) (2163) (127) (2413) (1707) (563) (1086) (149) (1373) (965) (61) (1179) (889)
132.56 72.12 50.63 27.81 9.36 43.50 31.11 100.66 4.00 126.00 65.22 40.16 64.23 5.72 72.06 51.01 2.30 61.00 34.30
(3367) (1832) (1286) (706) (236) (1105) (790) (2557) (102) (3200) (1657) (1020) (1631) (145) (1830) (1296) (58) (1549) (871)
132.56 72.12 50.63 27.81 9.36 43.50 31.11 100.66 4.00 126.00 65.22 40.16 64.23 5.72 72.06 51.01 2.30 61.00 34.30
(3367) (1832) (1286) (706) (236) (1105) (790) (2557) (102) (3200) (1657) (1020) (1631) (145) (1830) (1296) (58) (1549) (871)
132.56 72.12 50.63 27.81 9.36 43.50 31.11 100.66 4.00 126.00 65.22 40.16 64.23 5.72 72.06 51.01 2.30 61.00 34.30
(3367) (1832) (1286) (706) (236) (1105) (790) (2557) (102) (3200) (1657) (1020) (1631) (145) (1830) (1296) (58) (1549) (871)
132.56 72.12 50.63
27.81 9.36 43.50 31.11 100.66 4.00 126.00 65.22 40.16 64.23 5.72 72.06 51.01 2.30 61.00 34.30
(3367) (1832) (1286) (706) (236) (1105) (790) (2557) (102) (3200) (1657) (1020) (1631) (145) (1830) (1296) (58) (1549) (871)
Fig. 3 — Base Unit Dimensions, 30HXA076-146 Units
4
Download from Www.Somanuals.com. All Manuals Search And Download.
LEGEND
Knockout
K.O.
SAE
—
—
Society of Automotive
Engineers, U.S.A.
Thick
THK
TYP
—
—
Typical
NOTES:
1.
Denotes center of gravity.
2. Dimensions are in inches. Dimensions ( ) are in millimeters.
3. Recommended service clearance around unit (front, back, and one side) is
36Љ (914).
DIMENSIONS — in. (mm)
UNIT
30HXA
A
B
C
D
E
F
G
H
J
72.12
50.63
48.56
46.62
72.06
51.00
2.70
(69)
62.50
35.20
(894)
161
171
186
(1832)
(1386)
(1233)
(1184)
(1830)
(1295)
(1588)
61.37
(1559)
61.37
(1559)
43.25
(1099)
46.62
(1184)
61.31
(1572)
61.75
(1568)
2.70
(69)
62.50
(1588)
35.20
(894)
61.37
(1559)
61.37
(1559)
43.25
(1099)
46.62
(1184)
61.31
(1572)
61.75
(1568)
2.70
(69)
62.50
(1588)
35.20
(894)
Fig. 4 — Base Unit Dimensions, 30HXA161-186 Units
5
Download from Www.Somanuals.com. All Manuals Search And Download.
WEIGHT DISTRIBUTION AT EACH MOUNTING PLATE,
30HXC UNITS — Lb (Kg)
WEIGHT DISTRIBUTION AT EACH MOUNTING PLATE,
30HXA UNITS — Lb (Kg)
MOUNTING PLATE NO.
MOUNTING PLATE NO.
UNIT
30HXC
UNIT
30HXA
1
2
3
4
5
6
1
2
3
4
5
6
738
943
595
1110
1418
(643)
896
555
793
418
926
1326
(601)
699
076
086
096
106
116
126
136
146
161
171
186
076
086
096
106
116
126
136
146
161
171
186
(335)
(428)
(270)
(503)
(406)
(252)
(360)
(190)
(420)
(317)
738
(335)
947
(430)
597
(271)
1112
(504)
1427
(647)
902
(409)
555
(252)
798
(362)
418
(190)
928
(421)
1340
(608)
705
(320)
686
(311)
968
(439)
693
(314)
1027
(466)
1447
(656)
1034
(469)
509
(231)
808
(367)
493
(224)
848
(385)
1350
(612)
827
(375)
730
(331)
1028
(466)
744
(337)
1073
(487)
1510
(685)
1092
(495)
555
(252)
869
(394)
541
(245)
896
(406)
1410
(640)
880
(399)
728
(330)
1114
(505)
777
(352)
1053
(478)
1615
(733)
1127
(511)
530
(240)
895
(406)
540
(245)
855
(388)
1456
(660)
887
(402)
738
(335)
1127
(511)
780
(354)
1061
(481)
1628
(738)
1131
(513)
540
(245)
905
(410)
541
(245)
864
(392)
1468
(666)
887
(402)
758
(344)
1176
(533)
811
(368)
1083
(491)
1689
(766)
1171
(531)
548
(249)
926
(420)
555
(252)
8743
(396)
1498
(679)
908
(412)
763
(346)
1182
(536)
815
(370)
1085
(492)
1697
(770)
1172
(532)
551
(250)
930
(422)
555
(252)
883
(400)
1506
(683)
908
(412)
817
(371)
1272
(577)
908
(412)
1219
(553)
1890
(857)
1346
(610)
560
(254)
965
(438)
598
(271)
954
(433)
1650
(748)
1025
(465)
936
(425)
1318
(598)
840
(381)
1379
(626)
1946
(883)
1241
(563)
627
(284)
968
(439)
534
(242)
1072
(486)
1658
(752)
918
(416)
962
(436)
1361
(617)
860
(390)
1410
(640)
1996
(905)
1265
(574)
648
(294)
1004
(455)
552
(250)
1110
(504)
1703
(772)
939
(426)
NOTE: See Fig. 1-4 for center of gravity details.
Fig. 5 — Rigging Information
6
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 1A — Physical Data, English
UNIT SIZE
076
086
096
106
116
126
136
146
161
171
186
UNIT WEIGHT (lb)
Fluid Cooled (HXC)
Condenserless (HXA)
5700
4717
5723
4744
5855
4835
6177
5151
6415
5162
6465
5205
6688
5308
6718
5333
7452
5752
7660
5777
7854
5946
COMPRESSORS
Quantity
Semi-Hermetic, Twin Screw
2
2
2
2
2
2
2
2
2
2
2
Nominal Capacity per
Compressor (tons)
Economizer
39/39 46/39 56/39 66/39 66/46 66/56
80/56
No
80/66
No
80/56
Yes
66/80
Yes
80/80
Yes
No
No
No
No
No
No
No. Capacity Steps
Standard
6
8
6
8
6
8
6
8
6
8
6
8
6
8
6
8
6
8
6
8
6
8
Optional (maximum)
Minimum Step Capacity (%)
Standard
20
10
20
10
20
10
20
10
20
10
20
10
20
10
20
10
20
10
20
10
20
10
Optional
REFRIGERANT TYPE
Charge* (lb)
R-134a
55/55 66/55 79/55 95/55 95/66 95/79 114/79 114/95 130/90 109/130 130/130
Circuit A/Circuit B
COOLER TYPE
Shell and Tube with Enhanced Copper Tubes
Part No. 10HX400−
Net Fluid Volume (gal)
Maximum Refrigerant Pressure
(psig)
001
001
002
010
007
007
006
006
104
012
013
17.0
17.0
19.0
22.6
21.4
21.4
24.0
24.0
28.5
28.5
33.4
220
220
220
220
220
220
220
220
220
220
220
Maximum Fluid-Side Pressure
(psig)
Fluid Connections (in.)
Inlet and Outlet
Drain (NPT)
300
300
300
300
300
300
300
300
300
300
300
Steel Weld Couplings
4
4
4
5
4
4
4
4
5
5
5
1
1
1
1
1
1
1
1
1
1
1
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
30HXA OIL SEPARATOR
Part No. 09RX400−
Maximum Refrigerant Pressure
(psig)
007
320
007
320
008
320
008
320
009
320
009
320
009
320
009
320
009
320
010
320
010
320
Refrigerant Connections (in.)
Discharge
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
13⁄8
21⁄8
13⁄8
21⁄8
13⁄8
Liquid
CONDENSER (HXC)
Part No. 09RX400−
Net Fluid Volume (gal)
Maximum Refrigerant Pressure
(psig)
Shell and Tube with Enhanced Copper Tubes
001
001
002
002
003
003
004
004
005
006
006
16.8
16.8
18.3
18.3
23.9
23.9
27.5
27.5
30.6
37.6
37.6
220
220
220
220
220
220
220
220
220
220
220
Maximum Water-Side Pressure
(psig)
300
300
300
300
300
300
300
300
300
300
300
Water Connections (in.)
Inlet and Outlet
Drain (NPT)
Steel Weld Couplings
5
5
5
5
5
5
5
5
5
5
5
1
1
1
1
1
1
1
1
1
1
1
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
*Charges listed are for 30HXC units. The 30HXA units are shipped with a holding charge only.
7
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 1B — Physical Data, SI
UNIT SIZE
076
086
096
106
116
126
136
146
161
171
186
UNIT WEIGHT (Kg)
Fluid Cooled (HXC)
Condenserless (HXA)
2586
2140
2596
2152
2656
2193
2802
2336
2910
2341
2933
2361
3034
2408
3047
2419
3380
2609
3476
2620
3563
2697
COMPRESSORS
Quantity
Semi-Hermetic, Twin Screw
2
2
2
2
2
2
2
2
2
2
2
Nominal Capacity per
Compressor (kW)
Economizer
137/137 162/137 197/137 232/137 232/137 232/197 281/197 281/232 281/197 232/281 281/281
No
No
No
No
No
No
No
No
Yes
Yes
Yes
No. Capacity Steps
Standard
6
8
6
8
6
8
6
8
6
8
6
8
6
8
6
8
6
8
6
8
6
8
Optional (maximum)
Minimum Step Capacity (%)
Standard
20
10
20
10
20
10
20
10
20
10
20
10
20
10
20
10
20
10
20
10
20
10
Optional
REFRIGERANT TYPE
Charge* (Kg)
R-134a
24.9/
24.9
29.9/
24.9
35.8/
24.9
43.1/
24.9
43.1/
29.9
43.1/
35.8
51.7/
35.8
51.7/
43.1
59.0/
40.8
49.4/
59.0
59.0/
59.0
Circuit A/Circuit B
COOLER TYPE
Shell and Tube with Enhanced Copper Tubes
Part No. 10HX400−
Net Fluid Volume (L)
Maximum Refrigerant
Pressure (kPa)
001
001
002
010
007
007
006
006
104
012
013
64.3
64.3
71.9
85.5
81.0
81.0
90.8
90.8
107.9
107.9
126.4
1517
1517
1517
1517
1517
1517
1517
1517
1517
1517
1517
Maximum Fluid-Side
Pressure (kPa)
2068
2068
2068
2068
2068
2068
2068
2068
2068
2068
2068
Fluid Connections (in.)
Inlet and Outlet
Steel Weld Couplings
4
4
4
5
4
4
4
4
5
5
5
1
1
1
1
1
1
1
1
1
1
1
Drain (NPT)
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
30HXA OIL SEPARATOR
Part No. 09RX400−
Maximum Refrigerant
Pressure (kPa)
007
007
008
008
009
009
009
009
009
010
010
2205
2205
2205
2205
2205
2205
2205
2205
2205
2205
2205
Refrigerant Connections (in.)
Discharge
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
11⁄8
21⁄8
13⁄8
21⁄8
13⁄8
21⁄8
13⁄8
Liquid
CONDENSER (HXC)
Part No. 09RX400−
Net Fluid Volume (L)
Maximum Refrigerant
Pressure (kPa)
Shell and Tube with Enhanced Copper Tubes
001
001
002
002
003
003
004
004
105
006
006
63.6
63.6
69.3
69.3
90.5
90.5
104.1
104.1
115.8
142.3
142.3
1517
1517
1517
1517
1517
1517
1517
1517
1517
1517
1517
Maximum Water-Side
Pressure (kPa)
2068
2068
2068
2068
2068
2068
2068
2068
2068
2068
2068
Water Connections (in.)
Inlet and Outlet
Drain (NPT)
Steel Weld Couplings
5
5
5
5
5
5
5
5
5
5
5
1
1
1
1
1
1
1
1
1
1
1
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
⁄
2
*Charges listed are for 30HXC units. The 30HXA units are shipped with a holding charge only.
8
Download from Www.Somanuals.com. All Manuals Search And Download.
IMPORTANT: Some of the unit skids are larger than
standard door openings. Be sure that the path to the
unit’s final destination is wide enough to accommo-
date unit shipping skid. Remove the skid if necessary.
If skid is removed and rollers are used, attach rollers
to unit tube sheets while moving unit.
Tighten all cooler head bolts to 250 ft-lb (339 N-m)
before filling system with water (or brine).
6. Install field-supplied differential flow switches in the cooler
piping for protection against loss of flow. The differential
flow switches must be installed on top of the pipe in a
horizontal run and should be at least 5 pipe diameters from
any bend. Install the low-pressure differential flow switch
into the outlet line piping, and install the high-pressure
differential flow switch into the inlet line piping as shown
in Fig. 8.
Areas where unit mounting points will be located must be
1
level to within ⁄16 in. per ft (1 mm per m) along the long
axis of the unit. Once unit is in place and level, bolt unit to
the floor. Use isolation pads under the unit to aid in vibration
isolation as required.
Step 3 — Piping Connections — See Fig. 6 and
7. Provide openings in fluid piping for pressure gages and
thermometers (if used). These openings should be 5 to 10
pipe diameters from the unit water nozzles. For thorough
mixing and temperature stabilization, wells in the leav-
ing fluid pipe should extend at least 2 in. (50 mm) into
the pipe.
7 for typical piping applications.
COOLER FLUID, VENT, AND DRAIN — The inlet (re-
turn) fluid connection is always the lower of the 2 cooler
connections. See Fig. 6 for locations. A screen strainer with
a minimum of 20 mesh should be installed ahead of the cooler
inlet to prevent debris from damaging internal tubes of the
cooler. Outlet (supply) fluid connection is the upper connec-
tion of the 2 cooler connections.
The cooler has weld flanges to connect the field-supplied
piping. Plan the piping arrangement in accordance with good
piping practices and so that the piping does not cross in front
of the cooler head. Use flexible connections on cooler pip-
ing to reduce vibration transmission. Offset the piping to per-
mit removal of the cooler head for maintenance. Install pipe
hangers where needed. Make sure no weight or stress is placed
on the water nozzle.
Accessory Victaulic-type connections are available. Fol-
low the connection directions provided with the accessory.
Although cooler has an air vent, it is recommended that a
field-supplied air vent be installed in the system to facilitate
servicing. Field-supplied shut-off and balancing valves should
also be installed to facilitate servicing and flow balancing.
Locate valves in return and supply fluid lines as close to the
chiller as possible. Locate air vent at highest point of the
cooler fluid system. See Fig. 6.
Provide drain connections at all low points to permit com-
plete drainage of the system.
To install cooler piping:
1. Remove bolts on weld flanges, and remove flanges from
cooler fluid heads.
BRINE UNITS — Special factory modifications to the units
are required to allow them to operate at fluid temperatures
less than 34 F (1.1 C). Be sure that the fluid has sufficient
inhibited ethylene glycol or other suitable corrosion-
resistant antifreeze solution to prevent cooler freeze up.
Remove the weld flanges before welding piping to
the flanges. Refer to Fig. 1-4 for weld flange loca-
tions. Failure to remove the flanges may damage the
sensors and insulation.
PREPARATION FOR YEAR-ROUND OPERATION — In
areas where the piping or unit is exposed to 32 F (0 °C) or
lower ambient temperatures, freeze-up protection is recom-
mended using inhibited ethylene glycol or other suitable
corrosion-resistant antifreeze solution and electric heater tapes.
Heater tapes should have a rating for area ambient tempera-
tures and be covered with a suitable thickness of closed-cell
insulation. Route power for the heater tapes from a separately-
fused disconnect. Mount the disconnect within sight from
the unit per local or NEC codes. Identify disconnect as heater
tape power source with warning that power must not be turned
off except when servicing unit.
Fill the fluid loop with water (or brine) and a corrosion-
resistant inhibitor suitable for the water of the area. Consult
the local water authority for characteristics of area water and
a recommended inhibitor for the cooler fluid loop. It is rec-
ommended that once the cooler water lines have been
installed and leak checked that the cooler heads be insulated
with a suitable thickness of closed-cell insulation. This will
minimize the amount of condensation that will form on the
cooler heads.
2. To keep debris from entering the heat exchanger during
shipping and storage, the gaskets between the weld flanges
and the fluid heads do not have holes cut into them. The
gaskets have perforations where the holes are to be cut.
Carefully cut a hole along the designated perforations.
IMPORTANT: Be sure to remove flanges and cut
holes in the gaskets between the flanges and the fluid
heads as indicated.
3. Apply a thin coat of oil to both sides of each gasket to
help ensure a good seal, and reattach each gasket to each
fluid head.
4. Weld the field-supplied piping to the weld flanges.
5. Bolt the weld flanges back onto their respective fluid heads.
IMPORTANT: When bolting the weld flanges to the
fluid heads, be sure to locate the flange such that
the hole in each flange lines up completely with the
hole in each fluid head. If installed incorrectly, part
of the hole in the fluid head will be blocked off.
This will result in impaired fluid flow in high pres-
sure drop applications.
IMPORTANT: Before starting the unit, be sure all of
the air has been purged from the system.
A drain connection is located at the bottom of the cooler
head. See Fig. 3 and 4 for connection location. Install shut-
off valves to the drain line before filling the system with fluid.
9
Download from Www.Somanuals.com. All Manuals Search And Download.
10
Download from Www.Somanuals.com. All Manuals Search And Download.
NOTES:
1. Piping shown is for general point-of-connection only and is not in-
tended to show details for a specific installation. Certified field wir-
ing and dimensional drawings are available upon request. The 30HXA
units should be installed using certified drawings.
2. Refer to Carrier System Design Manual for details regarding pip-
ing techniques.
3. Piping and pressure relief devices are field supplied.
4. Vent pipes properly per local codes.
TO REMOTE
CONDENSER(S)
TO REMOTE
CONDENSER(S)
TO REMOTE
CONDENSER(S)
TO REMOTE
CONDENSER(S)
COOLER*
EXV
EXV
PRESSURE
RELIEF
OIL
SEPARATOR
LIQUID LINE
DISCHARGE
LINE
LEGEND
ANGLE
VALVE
EXV
—
Electronic Expansion Valve
LIQUID LINE
*See Fig. 6 for typical cooler piping.
Fig. 7 — Typical 30HXA Refrigerant Piping to Remote Condenser
30HXA REFRIGERANT PIPING (See Fig. 7) — Take
care when running the refrigerant piping from the 30HXA
unit to the remote condenser(s) to avoid excessive pres-
sure drops. The pressure drop using R-134a refrigerant is
different than when using R-22 refrigerant. See Tables 2 and
3 for an example for a 2 F (1.1 C) pressure drop in saturated
temperature in the discharge (hot gas) line and liquid line,
respectively. Refer to Fig. 9 and 10 for line sizing informa-
tion for the discharge and liquid lines for 30HXA (R-134a)
units.
Table 2 — Discharge Line 2 F (1.1 C) Drop in
Saturated Temperature Example
SATURATED
DISCHARGE
TEMP
PRESSURE
R-134a
Psig
R-22
F
C
kPa
1293
1255
38
Psig
kPa
1942
1891
51
126
124
52.2
51.1
187.5
182.0
5.5
281.6
274.3
7.3
⌬ PRESSURE
LEGEND
COM
N.O.
—
—
Common
Normally Open
Fig. 8 — Differential Flow Switch
11
Download from Www.Somanuals.com. All Manuals Search And Download.
NOTES:
1. Values are for a 2° F pressure drop at 125 F (51.7 C) saturated discharge tem-
perature, 120 F (48.9 C) saturated condensing temperature, and 105 F (40.6 C)
liquid refrigerant temperature.
2. Size each circuit separately.
Fig. 9 — R-134a Liquid Line Sizing, 30HXA Units
Table 3 — Liquid Line 2 F (1.1 C) Drop in
Saturated Temperature Example
IMPORTANT: There is a Schrader-type fitting in each
of the two 1⁄4-in. fittings. These Schrader-type fittings
MUST BE REMOVED before running the line.
SATURATED
LIQUID
PRESSURE
R-134a
Psig kPa
R-22
TEMP
The 30HXA units are shipped from the factory with a hold-
ing charge of R-134a. Before opening the refrigerant sys-
tem, relieve system pressure and recover system refrigerant
through the charging valve on the cooler.
F
C
Psig
195.9
190.2
5.7
kPa
1351
1311
40
100
98
37.7
36.7
124.3
120.1
4.2
857
828
29
⌬ PRESSURE
30HXC CONDENSER CONNECTIONS — The inlet fluid
connection is always the lower of the 2 condenser con-
nections. It is recommended that a screen strainer with a
minimum of 20 mesh be installed ahead of the condenser
inlet to prevent debris from damaging the internal condenser
tubes.
The outlet water connection is the upper connection of
the 2 connections. The condenser has weld couplings to
connect field-supplied piping. Plan the piping arrangement
in accordance with good piping practices and so that the pip-
ing does not cross in front of the condenser head. Use flex-
ible connections on the condenser piping to reduce vibration
transmission. Offset the piping to permit condenser head re-
moval for maintenance purposes. Install pipe hangers where
needed. Make sure no weight or stress is placed on the water
nozzle.
Discharge lines should be looped above the compressors
to avoid having charge flowing back to the oil separator and
compressor during unit shutdown. Wrap back-pressure valve
when brazing discharge line to avoid damaging the valve.
It is recommended that field-supplied pressure relief valves
be installed in each discharge line. Most local codes require
that the relief valves be vented directly to the outdoors. The
vent must not be smaller than the relief valve outlet, and the
pressure setting should be 320 psig (2205 kPa).
Run a field-supplied 1⁄4-in. (6.4 mm) copper line between
the back-pressure valve on the oil separator (bottom pres-
sure vessel) to the fitting on the refrigerant line entering the
economizer port of the compressor to measure oil pressure
differential. See Fig. 11. The back-pressure valve and the fit-
ting on the refrigerant line have a 1⁄4-in. flare fitting for mak-
ing this connection. The flare nut is field supplied.
12
Download from Www.Somanuals.com. All Manuals Search And Download.
NOTES:
1. Values are for a 2° F pressure drop at 125 F (51.7 C) saturated discharge tem-
perature, 120 F (48.9 C) saturated condensing temperature, and 105 F (40.6 C)
liquid refrigerant temperature.
2. Size each circuit separately.
Fig. 10 — R-134a Discharge Line Sizing, 30HXA Units
1
Fig. 11 — Field-Supplied ⁄4-in. Copper Tube, 30HXA Units
13
Download from Www.Somanuals.com. All Manuals Search And Download.
To install condenser piping:
1. Remove bolts on weld flanges, and remove flanges from
condenser water heads.
INSTALL PRESSURE RELIEF REFRIGERANT VENT
PIPING — To facilitate refrigerant vent piping, units have
flares for all of the relief fittings. The low side relief valves
on all units are provided with a 3/4 in. NPT flare connec-
tions, and are located on the cooler shell. There are 2 relief
valves for the cooler; one on each circuit.
The 30HXA high side relief valve is provided with a
5/8 in. SAE (Society of Automotive Engineers, U.S.A.) flare
connection. The 30HXC high side relief valves are provided
with a 3/4 in. NPT flare connection, and are located on the
condenser shell.
Remove the weld flanges before welding piping to
the flanges. Refer to Fig. 1 and 2 for weld flange
locations. Failure to remove the flanges may dam-
age the sensors and insulation.
2. To keep debris from entering the heat exchanger during
shipping and storage, the gaskets between the weld flanges
and the water heads do not have holes cut into them. The
gaskets have perforations where the holes are to be cut.
Carefully cut a hole along the designated perforations.
There are 2 relief valves for the separator (30HXA) and
2 for the condenser (30HXC); one for each circuit. Most
local codes require that these devices be piped to the out-
side. If vent piping is required by local codes, these con-
nections have been provided to aid in the connection of vent
piping in accordance with ASHRAE 15 (American Society
of Heating, Refrigeration, and Air Conditioning Engineers),
Safety Code for Mechanical Refrigeration. If vent piping is
required, do not restrict the vent flow in any way.
IMPORTANT: Be sure to remove flanges and cut
holes in the gaskets between the flanges and the wa-
ter heads as indicated.
NOTE: When accessory suction service valve kit is in-
stalled, there are 2 additional high-side pressure relief valves.
Pipe these valves per local codes. These are located on the
discharge line between the muffler and the discharge shut-
off valve.
3. Apply a thin coat of oil to both sides of each gasket to
help ensure a good seal, and reattach each gasket to each
water head.
4. Weld the field-supplied piping to the weld flanges.
5. Bolt the weld flanges back onto their respective water
heads.
Step 4 — Make Electrical Connections — The
electrical characteristics of the available power supply must
agree with the unit nameplate rating. Supply voltage must
be within the limits shown.
IMPORTANT: When bolting the weld flanges to the
water heads, be sure to locate the flange such that
the hole in each flange lines up completely with the
hole in each water head. If installed incorrectly, part
of the hole in the water head will be blocked off.
This will result in impaired water flow in high pres-
sure drop applications.
FIELD POWER CONNECTIONS (See Fig. 12) — All power
wiring must comply with applicable local and national codes.
Install field-supplied, branch circuit fused disconnect(s) of a
type that can be locked off or open. Disconnect(s) must be
located within sight and readily accessible from the unit in
compliance with NEC Article 440-14. See Tables 4A and 4B
for unit electrical data. See Tables 5A and 5B for compres-
sor electrical data.
Provide openings in water piping for pressure gages and
thermometers (if used). These openings should be 5 to 10
pipe diameters from the unit water nozzles. For thorough mix-
ing and temperature stabilization, wells in the leaving water
pipe should extend at least 2 in. (50 mm) into the pipe.
Accessory Victaulic-type connections and condenser-
water thermistors are available. Follow the connection di-
rections as provided with the accessory. If accessory differ-
ential pressure switch, water flow switch, or condenser water
thermistor is to be installed, install the proper fittings into
the condenser water lines before water is connected.
Although condenser has an air vent, it is recommended
that a field-supplied air vent be installed in the system to
facilitate servicing. Field-supplied shut-off and balancing valves
should also be installed to facilitate servicing and flow bal-
ancing. Locate valves in inlet and outlet lines as close to the
chiller as possible. Locate air vents at the highest point of
the system loop. See Fig. 6.
IMPORTANT: the 30HX units have a factory-installed
option available for a non-fused disconnect for unit power
supply. If the unit is equipped with this option, all field
power wiring should be made to the non-fused discon-
nect since no terminal blocks are supplied.
All units have a single location for power entry to sim-
plify the field power wiring. Maximum wire size that the
unit terminal block or non-fused disconnect will accept is
500 kcmil.
All 380/415-3-50, 460-3-60, and 575-3-60 units require
a single field-supplied power supply. All 230-3-50 and
208/230-3-60 units require 2 separate field-supplied power
supplies.
All 380-3-60 units (except the 30HXC/A186 units)
require
a
single field-supplied power supply. The
Provide drain connections at all low points in the loop to
permit complete system drainage.
For installations where entering condensing water tem-
perature could be below 70 F (21 C), a field-supplied
leaving water temperature regulating valve is required.
Operation below 70 F (21.1 C) without this valve may cause
the unit to shut down on low oil pressure alarms.
30HXC/A186 units require 2 field-supplied power supplies.
The 30HXA136-186 and 30HXC171,186, 346-3-50 units
require 2 field-supplied power supplies. All other 346-3-50
units require a single field-supplied source.
FIELD CONTROL POWER CONNECTIONS (See
Fig. 13) — Units with a power supply of 208/230-, 460-,
and 575-3-60 require 115-1-60 control circuit power. Units
with a 380-3-60 power supply require 230-1-60 control cir-
cuit power. All other units 230-1-50 control circuit power.
Field control power connections are made at terminals 1 and
2 of TB4.
NOTE: This valve should be a temperature-controlled
valve (DO NOT USE a pressure-controlled valve) which
controls to 80 F (26.7 C) leaving water temperature. Be sure
to add a bleed line between the entering and leaving water
lines.
Copy continued on page 26.
14
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 4A — Unit Electrical Data, 30HXC Units*
VOLTAGE
Supplied
POWER CIRCUIT
CONTROL CIRCUIT
ICF
UNIT
30HXC
Nameplate
Voltage
(Single
Ph)
Recommended
(3 Ph)
Min
Max
MCA
MOCP
Min
Max
MCA
MOCP
WD
XL
Fuse Size
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
123/123
100
200/200
150
175/150
125
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
307
148
118
169
266
118
165
†
374
299
419
†
575-60
80
110
100
076
086
096
106
116
126
136
146
380-60
121
175
150
15
15
230-50
115/115
138
200/200
175
150/150
175
346-50
†
400
380/415-50
126
175
150
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
148/123
111
250/200
150
200/150
125
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
307
148
118
169
305
208
190
†
374
299
419
†
575-60
89
125
100
380-60
135
200
175
15
15
15
15
15
15
15
15
15
15
15
15
15
15
230-50
140/115
154
250/200
225
75/150
175
346-50
†
479
380/415-50
140
200
175
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
181/122
126
300/200
175
225/150
150
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
354
172
137
195
347
237
216
†
449
359
502
†
575-60
101
153
150
225
125
175
380-60
230-50
169/115
173
300/200
250
225/150
200
346-50
†
562
380/415-50
158
225
200
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
219/123
143
350/200
200
300/150
175
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
405
197
158
223
397
271
247
†
529
423
590
†
575-60
115
174
175
250
150
200
380-60
230-50
202/115
195
350/200
300
250/150
225
346-50
†
661
380/415-50
178
250
225
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
219/148
153
350/250
225
300/200
175
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
426
207
166
234
417
284
259
†
539
431
601
†
575-60
122
185
175
250
150
225
380-60
230-50
202/140
208
350/250
300
250/175
250
346-50
†
673
380/415-50
190
250
225
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
219/181
165
350/300
225
300/225
200
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
452
219
175
248
440
300
273
†
551
440
615
†
575-60
131
199
175
250
150
225
380-60
230-50
202/169
224
350/300
300
250/225
250
346-50
†
687
380/415-50
204
300
250
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
263/181
184
450/300
250
350/225
225
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
512
249
199
282
496
338
308
†
646
536
720
†
575-60
147
222
200
300
175
300
380-60
230-50
245/169
252
400/300
350
300/225
300
346-50
†
797
380/415-50
230
300
300
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
263/219
198
450/350
250
350/300
225
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
542
262
210
299
523
355
324
†
659
547
737
†
575-60
158
240
225
350
200
300
380-60
230-50
245/202
270
400/350
400
300/250
350
346-50
†
813
380/415-50
246
350
300
See legend and notes on page 16.
15
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 4A — Unit Electrical Data, 30HXC Units* (cont)
VOLTAGE
Supplied
POWER CIRCUIT
CONTROL CIRCUIT
ICF
UNIT
30HXC
Nameplate
Voltage
(Single
Ph)
Recommended
(3 Ph)
Min
Max
MCA
MOCP
Min
Max
MCA
MOCP
WD
XL
Fuse Size
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
285/197
200
500/350
300
350/250
250
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
591
287
230
325
578
394
358
†
756
605
843
†
575-60
160
225
200
161
171
186
380-60
242
350
300
15
15
230-50
266/182
273
450/300
400
350/225
350
346-50
†
944
380/415-50
249
350
300
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
238/285
215
400/500
300
300/400
250
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
624
302
242
343
607
413
376
†
771
617
861
†
575-60
172
250
200
380-60
260
350
300
15
15
15
15
230-50
219/266
145/176
267
350/450
250/300
350
300/350
175/225
300
346-50
†
962
380/415-50
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
285/285
232
185
156/156
266/266
176/176
289
500/500
300
250
250/250
450/450
300/300
400
400/400
300
225
200/200
350/350
225/225
350
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
661
319
255
364
645
438
399
†
788
630
882
†
575-60
380-60
230-50
346-50
†
985
380/415-50
LEGEND
7. The MOCP is calculated as follows:
ICF
—
Maximum Instantaneous Current Flow during start-up
(the point in the starting sequence where the sum of the
LRA for the start-up compressor, plus the total RLA for
all running compressors, plus the total FLA for all run-
ning fan motors is at a maximum)
MOCP = (2.25) (largest RLA) + the sum of the other RLAs. Size
the fuse one size down from the result. The RLAs are listed on the
unit nameplate.
The recommended fuse size in amps (RFA) is calculated as
follows:
MCA
MOCP
RLA
WD
—
—
—
—
—
Minimum Circuit Ampacity (for wire sizing)
Maximum Overcurrent Protection
RFA = (1.50) (largest RLA) + the sum of the other RLAs. Size
the fuse one size up from the result. The RLAs are listed on the
unit nameplate.
Rated Load Amps
Wye-Delta Start
8. Units have the following power wiring terminal blocks and parallel
conductors:
XL
Across-the-Line Start
*Refer to Carrier’s electronic catalog for the most current electrical
data.
TERMINAL
BLOCKS
OR NON-FUSED
DISCONNECTS
PARALLEL
†Wye-Delta Start is standard. Not available in across-the-line start.
**The 30HX186 units have 2 terminal blocks/non-fused disconnects
and 6 parallel conductors/non-fused disconnects.
CONDUCTORS
OR NON-FUSED
DISCONNECTS
VOLTAGE
††The 30HXC171 and 186 units have 2 terminal blocks/non-fused
disconnects and 6 parallel conductors/non-fused disconnects.
208/230
460
2
1
1
1
2
1
1
6
3
3
3
6
3
3
NOTES:
1. Main power must be supplied from a field-supplied fused electri-
cal service with a (factory- or field-installed) disconnect located in
sight from the unit.
575
380**
230
2. Control circuit power must be supplied from a separate source through
a field-supplied disconnect. The control circuit accessory trans-
former may be applied to power from the main unit power supply.
3. Maximum incoming wire size for each terminal block is 500 kcmil.
4. Maximum allowable phase imbalance is: voltage, 2%; amps, 5%.
5. Units with one MCA value have one main terminal block. Units
with 2 MCA values require multiple conductors.
346††
380/415
6. Use copper conductors only.
16
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 4B — Unit Electrical Data, 30HXA Units*
VOLTAGE
Supplied
POWER CIRCUIT
CONTROL CIRCUIT
ICF
UNIT
30HXA
Nameplate
Voltage
(Single
Ph)
Recommended
(3 Ph)
Min
Max
MCA
MOCP
Min
Max
MCA
MOCP
WD
XL
Fuse Size
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
180/180
146
300/300
200
225/225
175
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
451
218
175
248
440
299
273
†
550
440
615
†
575-60
117
150
150
076
086
096
106
116
126
136
146
380-60
177
250
200
15
15
230-50
169/169
201
300/300
250
225/225
225
346-50
†
687
380/415-50
183
250
225
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
215/180
162
350/300
225
300/225
200
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
511
248
199
282
496
337
308
†
645
536
720
†
575-60
130
175
150
380-60
196
250
225
15
15
15
15
15
15
15
15
15
15
15
15
15
15
230-50
205/169
225
350/300
300
250/225
300
346-50
†
797
380/415-50
206
300
250
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
262/180
183
450/300
250
350/225
225
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
577
281
225
318
567
386
352
†
750
600
836
†
575-60
147
222
200
300
175
300
380-60
230-50
248/169
254
400/300
350
300/225
300
346-50
†
938
380/415-50
231
350
300
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
319/180
209
500/300
300
400/225
250
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
662
324
259
365
620
423
385
†
885
708
985
†
575-60
167
253
250
350
200
300
380-60
230-50
300/169
289
500/300
400
400/225
350
346-50
†
1042
380/415-50
263
400
300
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
319/215
222
500/350
300
400/300
300
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
690
337
269
380
649
443
402
†
898
718
1000
†
†
1059
575-60
177
269
250
400
200
350
380-60
230-50
300/205
308
500/350
450
400/250
350
346-50
380/415-50
281
400
350
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
319/262
239
500/450
350
400/350
300
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
728
354
283
401
683
465
423
†
915
732
1021
†
†
1080
575-60
191
289
250
400
225
350
380-60
230-50
300/248
331
500/400
400
400/300
400
346-50
380/415-50
302
400
350
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
389/262
271
216
328
369/248
245/164
343
700/450
400
300
450
600/400
400/250
500
500/350
350
250
400
450/300
300/200
400
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
791
386
309
436
817
557
507
†
1015
812
1132
†
575-60
380-60
230-50
346-50
†
1346
380/415-50
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
389/319
291
233
353
369/300
245/199
369
700/500
400
300
500
600/500
400/350
500
500/400
350
300
400
450/400
300/250
450
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
837
406
325
461
859
585
532
†
1035
828
1157
†
575-60
380-60
230-50
346-50
†
1371
380/415-50
See legend and notes on page 18.
17
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 4B — Unit Electrical Data, 30HXA Units* (cont)
VOLTAGE
Supplied
POWER CIRCUIT
CONTROL CIRCUIT
Min Max MCA MOCP
ICF
UNIT
30HXA
Nameplate
Voltage
(Single
Ph)
Recommended
(3 Ph)
Min
Max
MCA
MOCP
WD
XL
Fuse Size
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
437/295 700/500
600/400
350
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
979
†
304
243
368
450
350
500
478 1282
382 1025
539 1428
575-60
300
161
171
186
380-60
450
15
15
15
15
15
15
230-50
415/275 700/450
276/183 450/300
500/350
350/225
450
858
535
533 1398
†
†
346-50
380/415-50
385
500
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
359/437 600/700
450/600
400
300
450
450/500
300/350
500
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
1030
†
327
261
396
450
350
500
501 1305
401 1044
567 1456
575-60
380-60
230-50
334/415 600/700
222/276 350/450
905
616
562 1427
†
†
346-50
380/415-50
413
600
208/230-60
460-60
187
414
518
342
207
325
342
253
506
633
418
253
380
440
437/437 700/700
600/600
400
350
300/300
500/500
350/350
600
115-60
115-60
115-60
230-60
230-50
230-50
230-50
104
104
104
207
198
198
198
127
127
127
254
254
254
254
1093
†
355
284
500
400
529 1333
539 1066
601 1490
575-60
380-60
239/239 400/400
415/415 700/700
276/276 450/450
230-50
970
660
601 1466
†
†
346-50
380/415-50
453
600
LEGEND
7. The MOCP is calculated as follows:
ICF
—
Maximum Instantaneous Current Flow during start-up
(the point in the starting sequence where the sum of the
LRA for the start-up compressor, plus the total RLA for
all running compressors, plus the total FLA for all run-
ning fan motors is at a maximum)
MOCP = (2.25) (largest RLA) + the sum of the other RLAs. Size
the fuse one size down from the result. The RLAs are listed on the
unit nameplate.
The recommended fuse size in amps (RFA) is calculated as
follows:
MCA
MOCP
RLA
WD
—
—
—
—
—
Minimum Circuit Ampacity (for wire sizing)
Maximum Overcurrent Protection
RFA = (1.50) (largest RLA) + the sum of the other RLAs. Size
the fuse one size up from the result. The RLAs are listed on the
unit nameplate.
Rated Load Amps
Wye-Delta Start
8. Units have the following power wiring terminal blocks and parallel
conductors:
XL
Across-the-Line Start
*Refer to Carrier’s electronic catalog for the most current electrical
data.
TERMINAL
BLOCKS
OR NON-FUSED
DISCONNECTS
PARALLEL
†Wye-Delta Start is standard. Not available in across-the-line start.
**The 30HX186 units have 2 terminal blocks/non-fused disconnects
and 6 parallel conductors/non-fused disconnects.
CONDUCTORS
OR NON-FUSED
DISCONNECTS
VOLTAGE
††The 30HXA136-186 units have
disconnects and 6 parallel conductors/non-fused disconnects.
2
terminal blocks/non-fused
208/230
460
2
1
1
1
2
1
1
6
3
3
3
6
3
3
NOTES:
1. Main power must be supplied from a field-supplied fused electri-
cal service with a (factory- or field-installed) disconnect located in
sight from the unit.
575
380**
230
2. Control circuit power must be supplied from a separate source through
a field-supplied disconnect. The control circuit accessory trans-
former may be applied to power from the main unit power supply.
3. Maximum incoming wire size for each terminal block is 500 kcmil.
4. Maximum allowable phase imbalance is: voltage, 2%; amps, 5%.
5. Units with one MCA value have one main terminal block. Units
with 2 MCA values require multiple conductors.
346††
380/415
6. Use copper conductors only.
18
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 5A — Compressor Electrical Data, 30HXC Units
COMPRESSOR NUMBERS
NAMEPLATE
UNIT SIZE
30HXC
V-Hz
A1
B1
(3 Phase)
RLA
LRA
RLA
LRA
208/230-60
460-60
*
*
*
*
44.3
35.4
53.7
*
330
264
365
*
44.3
35.4
53.7
*
330
264
365
*
575-60
076
076-WD
086
380-60
230-50
346-50
*
*
*
*
380/415-50
55.8
344
55.8
344
208/230-60
460-60
98.1
44.3
35.4
53.7
92.1
61.1
55.8
209
104
83
115
174
120
109
98.1
44.3
35.4
53.7
92.1
61.1
55.8
209
104
83
115
174
120
109
575-60
380-60
230-50
346-50
380/415-50
208/230-60
460-60
*
*
*
*
53.6
42.8
64.9
*
330
264
365
*
44.3
35.4
53.7
*
330
264
365
*
575-60
380-60
230-50
346-50
*
*
*
*
380/415-50
67.7
423
55.8
344
208/230-60
460-60
118.6
53.6
42.8
64.9
111.8
74.2
67.7
209
104
83
115
213
147
134
98.1
44.3
35.4
53.7
92.1
61.1
55.8
209
104
83
115
174
120
109
575-60
086-WD
380-60
230-50
346-50
380/415-50
208/230-60
460-60
*
*
*
*
65.5
52.3
79.2
*
405
324
448
*
44.3
35.4
53.7
*
330
264
365
*
575-60
096
380-60
230-50
346-50
*
*
*
*
380/415-50
81.7
506
55.8
344
208/230-60
460-60
144.9
65.5
52.3
79.2
134.9
89.5
81.7
256
128
102
141
255
176
160
98.1
44.3
35.4
53.7
92.1
61.1
55.8
209
104
83
115
174
120
109
575-60
096-WD
380-60
230-50
346-50
380/415-50
208/230-60
460-60
*
*
*
*
79.2
63.3
95.9
*
485
388
536
*
44.3
35.4
53.7
*
330
264
365
*
575-60
106
380-60
230-50
346-50
*
*
*
*
380/415-50
97.8
605
55.8
344
208/230-60
460-60
175.4
79.2
307
153
123
169
305
210
191
98.1
44.3
35.4
53.7
92.1
61.1
55.8
209
104
83
115
174
120
109
575-60
63.3
106-WD
380-60
95.9
230-50
161.7
107.3
97.8
346-50
380/415-50
208/230-60
460-60
*
*
*
*
79.2
63.3
95.9
*
485
388
536
*
53.6
42.8
64.9
*
330
264
365
*
575-60
116
380-60
230-50
346-50
*
*
*
*
380/415-50
87.8
605
67.7
423
208/230-60
460-60
175.4
79.2
307
153
123
169
305
210
191
118.6
53.6
42.8
64.9
111.8
74.2
67.7
209
104
83
115
213
147
134
575-60
63.3
116-WD
380-60
95.5
230-50
161.7
107.3
97.8
346-50
380/415-50
LEGEND
LRA
RLA
WD
—
—
—
Locked Rotor Amps
Rated Load Amps
Wye-Delta Start
*Units are shipped with wye-delta start as standard. Across-the-line start is not available.
19
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 5A — Compressor Electrical Data, 30HXC Units (cont)
COMPRESSOR NUMBERS
NAMEPLATE
UNIT SIZE
30HXC
V-Hz
A1
B1
(3 Phase)
RLA
LRA
RLA
LRA
208/230-60
460-60
*
*
*
*
79.2
63.3
95.9
*
485
388
536
*
65.5
52.3
79.2
*
405
324
448
*
575-60
126
126-WD
136
380-60
230-50
346-50
*
*
*
*
380/415-50
97.8
605
81.7
506
208/230-60
460-60
175.4
79.2
307
153
123
169
305
210
191
144.9
65.5
52.3
79.2
134.9
89.5
81.7
256
128
102
141
255
176
160
575-60
63.3
380-60
95.9
230-50
161.7
107.3
97.8
346-50
380/415-50
208/230-60
460-60
*
94.9
75.8
114.9
*
*
*
*
580
484
641
*
65.5
52.3
79.2
*
405
324
448
*
575-60
380-60
230-50
346-50
*
*
*
*
380/415-50
118.8
715
81.7
506
208/230-60
460-60
210.0
94.6
367
183
147
203
361
248
226
144.9
65.5
52.3
79.2
134.9
89.5
81.7
256
128
102
141
255
176
160
575-60
75.8
136-WD
380-60
114.9
196.3
130.3
118.8
230-50
346-50
380/415-50
208/230-60
460-60
*
94.9
75.8
114.9
*
*
*
*
580
484
641
*
79.2
63.3
95.9
*
485
388
536
*
575-60
146
380-60
230-50
346-50
*
*
*
*
380/415-50
118.8
715
97.8
605
208/230-60
460-60
210.0
94.9
367
183
147
203
361
248
226
175.4
79.2
307
153
123
169
305
210
191
575-60
75.8
63.3
146-WD
380-60
114.9
196.3
130.3
118.8
95.9
230-50
161.7
107.3
97.8
346-50
380/415-50
208/230-60
460-60
*
103.1
82.4
124.8
*
*
*
*
685
548
757
*
71.2
56.9
86.2
*
525
420
580
*
575-60
161
380-60
230-50
346-50
*
*
*
*
380/415-50
128.6
856
88.2
600
208/230-60
460-60
228.8
103.1
82.4
124.8
212.5
141.0
128.6
433
216
173
239
432
297
270
157.6
71.2
56.9
86.2
145.7
96.7
88.2
350
175
140
193
348
232
200
575-60
161-WD
380-60
230-50
346-50
380/415-50
208/230-60
460-60
*
86.1
68.8
104.2
*
*
*
103.1
82.4
124.8
*
*
580
484
641
*
685
548
757
*
575-60
171
380-60
230-50
346-50
*
*
*
*
380/415-50
105.8
715
128.6
856
208/230-60
460-60
190.6
86.1
367
183
147
203
361
248
233
228.8
103.1
82.4
124.8
212.5
141.0
128.6
433
216
173
239
432
297
270
575-60
68.8
171-WD
380-60
104.2
174.8
116.0
105.8
230-50
346-50
380/415-50
LEGEND
LRA
RLA
WD
—
—
—
Locked Rotor Amps
Rated Load Amps
Wye-Delta Start
*Units are shipped with wye-delta start as standard. Across-the-line start is not available.
20
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 5A — Compressor Electrical Data, 30HXC Units (cont)
COMPRESSOR NUMBERS
NAMEPLATE
UNIT SIZE
30HXC
V-Hz
A1
B1
(3 Phase)
RLA
LRA
RLA
LRA
208/230-60
460-60
*
103.1
82.4
124.8
*
*
*
*
685
548
757
*
103.1
82.4
124.8
*
685
548
757
*
575-60
186
380-60
230-50
346-50
*
*
*
*
380/415-50
128.6
856
128.6
856
208/230-60
460-60
228.8
103.1
82.4
124.8
212.5
141.0
128.6
433
216
173
239
432
297
270
228.8
103.1
82.4
124.8
212.5
141.0
128.6
433
216
173
239
432
297
270
575-60
186-WD
380-60
230-50
346-50
380/415-50
LEGEND
LRA
RLA
WD
—
—
—
Locked Rotor Amps
Rated Load Amps
Wye-Delta Start
*Units are shipped with wye-delta start as standard. Across-the-line start is not available.
21
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 5B — Compressor Electrical Data, 30HXA Units
COMPRESSOR NUMBERS
NAMEPLATE
UNIT SIZE
30HXA
V-Hz
A1
B1
(3 Phase)
RLA
LRA
RLA
LRA
208/230-60
460-60
*
*
*
*
64.9
51.9
78.7
*
485
388
536
*
64.9
51.9
78.7
*
485
388
536
*
575-60
076
076-WD
086
380-60
230-50
346-50
*
*
*
*
380/415-50
81.5
605
81.5
605
208/230-60
460-60
143.8
64.9
51.9
78.7
134.8
89.4
81.5
307
153
123
169
305
210
191
143.8
64.9
51.9
78.7
134.8
89.4
81.5
307
153
123
169
305
210
191
575-60
380-60
230-50
346-50
380/415-50
208/230-60
460-60
*
*
*
*
77.6
62.1
94.0
*
580
484
641
*
64.9
51.9
78.7
*
485
388
536
*
575-60
380-60
230-50
346-50
*
*
*
*
380/415-50
99.2
715
81.5
605
208/230-60
460-60
171.9
77.6
367
183
147
203
361
248
226
143.8
64.9
51.9
78.7
134.8
89.4
81.5
307
153
123
169
305
210
191
575-60
62.1
086-WD
380-60
94.0
230-50
163.9
108.8
99.2
346-50
380/415-50
208/230-60
460-60
*
94.8
75.7
114.7
*
*
*
*
685
548
757
*
64.9
51.9
78.7
*
485
388
536
*
575-60
096
380-60
230-50
346-50
*
*
*
*
380/415-50
119.9
856
81.5
685
208/230-60
460-60
209.8
94.8
433
216
173
239
432
297
270
143.8
64.9
51.9
78.7
134.8
89.4
81.5
307
153
123
169
305
210
191
575-60
75.5
096-WD
380-60
114.7
198.2
131.4
119.9
230-50
346-50
380/415-50
208/230-60
460-60
*
115.4
92.2
139.7
*
*
*
*
820
656
906
*
64.9
51.9
78.7
*
485
388
536
*
575-60
106
380-60
230-50
346-50
*
*
*
*
380/415-50
145.4
960
81.5
605
208/230-60
460-60
255.5
115.4
92.2
139.7
240.2
159.4
145.4
518
259
207
286
485
334
303
143.8
64.9
51.9
78.7
134.8
89.4
81.5
307
153
123
169
305
210
191
575-60
106-WD
380-60
230-50
346-50
380/415-50
208/230-60
460-60
*
115.4
92.2
139.7
*
*
*
*
820
656
906
*
77.6
62.1
94.0
*
580
484
641
*
575-60
116
380-60
230-50
346-50
*
*
*
*
380/415-50
145.4
960
99.2
715
208/230-60
460-60
255.5
115.4
92.2
139.7
240.2
159.4
145.4
578
259
207
286
485
334
303
171.9
77.6
367
183
147
203
361
248
226
575-60
62.1
116-WD
380-60
94.0
230-50
163.9
108.8
99.2
346-50
380/415-50
LEGEND
LRA
RLA
WD
—
—
—
Locked Rotor Amps
Rated Load Amps
Wye-Delta Start
*Units are shipped with wye-delta start as standard. Across-the-line start is not available.
22
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 5B — Compressor Electrical Data, 30HXA Units (cont)
COMPRESSOR NUMBERS
NAMEPLATE
UNIT SIZE
30HXA
V-Hz
A1
B1
(3 Phase)
RLA
LRA
RLA
LRA
208/230-60
460-60
*
115.4
92.2
139.7
*
*
*
94.8
75.7
114.7
*
*
820
656
906
*
685
548
757
*
575-60
126
126-WD
136
380-60
230-50
346-50
*
*
*
*
380/415-50
145.4
960
119.9
856
208/230-60
460-60
255.5
115.4
92.2
139.7
240.2
159.4
145.4
518
259
207
286
485
334
303
209.8
94.8
447
216
173
239
432
297
270
575-60
75.7
380-60
114.7
198.2
131.4
119.9
230-50
346-50
380/415-50
208/230-60
460-60
*
140.7
112.4
170.2
*
*
920
736
1017
*
*
94.8
75.7
114.7
*
*
685
548
757
*
575-60
380-60
230-50
346-50
*
*
*
*
380/415-50
178.8
1226
119.9
856
208/230-60
460-60
311.4
140.7
112.4
170.2
295.3
195.9
178.8
581
291
233
321
619
426
387
209.8
94.8
433
216
173
239
432
297
276
575-60
75.7
136-WD
380-60
114.7
198.2
131.4
119.9
230-50
346-50
380/415-50
208/230-60
460-60
*
140.7
112.4
170.2
*
*
920
736
1017
*
*
115.4
92.2
139.7
*
*
820
656
906
*
575-60
146
380-60
230-50
346-50
*
*
*
*
380/415-50
178.8
1226
145.4
960
208/230-60
460-60
311.4
140.7
112.4
170.2
295.3
195.9
178.8
581
291
233
321
619
426
387
255.5
115.4
92.2
139.7
240.2
159.4
145.4
518
259
207
286
485
334
303
575-60
146-WD
380-60
230-50
346-50
380/415-50
208/230-60
460-60
*
157.9
126.2
191.2
*
*
1175
940
1299
*
*
106.6
85.1
129.0
*
*
790
630
870
*
575-60
161
380-60
230-50
346-50
*
*
*
*
380/415-50
201.2
1265
133.4
1045
208/230-60
460-60
349.6
157.9
126.2
191.2
332.3
220.5
201.2
743
371
297
410
638
439
400
235.9
106.6
85.1
129.0
220.3
146.2
133.4
527
263
211
290
607
402
348
575-60
161-WD
380-60
230-50
346-50
380/415-50
208/230-60
460-60
*
129.6
103.6
156.9
*
*
920
736
1017
*
*
157.9
126.2
191.2
*
*
1175
940
1299
*
575-60
171
380-60
230-50
346-50
*
*
*
*
380/415-50
161.7
1226
201.2
1265
208/230-60
460-60
286.9
129.6
103.6
156.9
267.2
177.3
161.7
581
291
233
321
619
426
387
349.6
157.9
126.2
191.2
332.3
220.5
201.2
743
371
297
410
638
439
400
575-60
171-WD
380-60
230-50
346-50
380/415-50
LEGEND
LRA
RLA
WD
—
—
—
Locked Rotor Amps
Rated Load Amps
Wye-Delta Start
*Units are shipped with wye-delta start as standard. Across-the-line start is not available.
23
Download from Www.Somanuals.com. All Manuals Search And Download.
Table 5B — Compressor Electrical Data, 30HXA Units (cont)
COMPRESSOR NUMBERS
NAMEPLATE
UNIT SIZE
30HXA
V-Hz
A1
B1
(3 Phase)
RLA
LRA
RLA
LRA
208/230-60
460-60
*
157.9
126.2
191.2
*
*
1175
940
1299
*
*
*
1175
940
1299
*
157.9
126.2
191.2
*
575-60
186
380-60
230-50
346-50
*
*
*
*
380/415-50
201.2
1265
201.2
1265
208/230-60
460-60
349.6
157.9
126.2
191.2
332.3
220.5
201.2
743
371
297
410
638
439
400
349.6
157.9
126.2
191.2
332.3
220.5
201.2
743
371
297
410
638
439
400
575-60
186-WD
380-60
230-50
346-50
380/415-50
LEGEND
LRA
RLA
WD
—
—
—
Locked Rotor Amps
Rated Load Amps
Wye-Delta Start
*Units are shipped with wye-delta start as standard. Across-the-line start is not available.
LEGEND
NOTES:
1. Factory wiring is in accordance with NEC. Field modifications or
additions must be in compliance with all applicable codes.
2. Wiring for main field supply must be rated 75° C minimum. Use
copper for all units. Maximum incoming wire size for each terminal
block is 500 kcmil.
EQUIP
NEC
TB
Y-Delta
XL
—
—
—
—
—
Equipment
National Electrical Code (U.S.A.)
Terminal Block
Wye-Delta Start
Across-the-Line Start
Field Power Wiring
Field Control Wiring
Factory-Installed Wiring
Fig. 12 — Field Power Wiring
24
Download from Www.Somanuals.com. All Manuals Search And Download.
LEGEND
ALM
—
—
—
—
—
—
—
—
—
—
Alarm
CCN
Carrier Comfort Network
Communications
COMM
CWFS
CWP
Chilled Water (Fluid) Flow Switch
Chilled Water (Fluid) Pump
Chilled Water (Fluid) Pump Interlock
Equipment
CWPI
EQUIP
GND, GRD
NEC
Ground
National Electrical Code (U.S.A.)
Terminal Block
TB
Field Power Wiring
Field Control Wiring
Factory-Installed Wiring
NOTES:
1. Factory wiring is in accordance with NEC. Field modifications or additions must be in compliance with all appli-
cable codes.
2. Wiring for main field supply must be rated 75° C minimum. Use copper for all units. Maximum incoming wire size
for each terminal block is 500 kcmil.
3. Power for control circuit should be supplied from a separate source through a field-supplied, fused disconnect with
15 amp maximum protection for all control circuits. Connect control circuit power to terminals 1 and 2 of TB4.
Connect neutral side of supply to terminal 2 of TB4. Control circuit conductors for all units must be copper only.
4. Terminals 13 and 14 of TB2 are for field external connection for remote on-off. The contacts must be rated for dry
circuit application capable of handling a 24 vac to 50 mA load. Remove jumper between 13 and 14 of TB2 if remote
on-off is installed.
5. Terminals 11 and 12 of TB2 are for chilled water flow switch (CWFS) and chilled water pump interlock (CWPI)
functions. The contacts must be rated for dry circuit application capable of handling a 24 vac to 50 mA load.
6. Terminals 4 and 5 of TB2 are for control of chilled water pump starter. The maximum load allowed for the chilled
water pump relay is 125 va sealed, 1250 va inrush.
7. Terminals 2 and 3 of TB2 are for alarm. The maximum load allowed for the alarm is 125 va sealed, 1250 va inrush.
Fig. 13 — Field Control Wiring
25
Download from Www.Somanuals.com. All Manuals Search And Download.
Terminals TB2-11 and TB2-12 are provided for field in-
stallation of a chilled water (fluid) pump interlock (CWPI)
and a chilled water (fluid) flow switch (CWFS). These de-
vices are to be installed in series. Contacts must be rated for
day circuit applications capable of handling a 24-vac to
50 mA load.
Accessory remote on-off switch can be wired into TB2-13
and TB2-14. To use this feature, remove the factory-installed
jumper and install the device in series. See Fig. 13 for re-
mote on-off, CWPI, and CWFS wiring. Contacts must be
rated for dry load application capable of handling a 24-vac
to 50 mA load.
30HXA LOW-AMBIENT OPERATION — If outdoor
ambient operating temperatures below 60 F (15 C) are ex-
pected, refer to separate installation instructions for low-
ambient operation using accessory Motormaster III control.
MINIMUM LOAD ACCESSORY — If minimum load
accessory is required, use the appropriate package. Refer to
unit Price Pages or contact your local Carrier representative
for more details. For installation details, refer to separate in-
stallation instructions supplied with the accessory package.
MISCELLANEOUSACCESSORIES — For applications re-
quiring special accessories, the following packages are avail-
able: control power transformer, minimum load control, sound
reduction enclosure, external vibration isolation, expanded
display, Victaulic-type connections, temperature reset sen-
sor, and chilled fluid flow switch. Refer to individual acces-
sory installation instructions for installation details.
Do not use interlocks or other safety device contacts
connected between TB2 terminals 13 and 14 as remote
on-off. Connection of safeties or other interlocks be-
tween these 2 terminals will result in an electrical
bypass if the REMOTE-OFF-LOCAL switch is in the
LOCAL position. If remote on-off unit control is re-
quired, a field-supplied relay must be installed in the
unit control box and wired as shown in Fig. 13. Failure
to wire the remote on-off as recommended will result in
tube freeze damage.
Step 6 — Leak Test Unit
30HXC UNIT — These units are shipped from the factory
with a full charge of R-134a (See Tables 1A and 1B). Per-
form a leak test to ensure that leaks have not developed
during unit shipment. Dehydration of the system is not re-
quired unless the entire refrigerant charge has been lost. There
are a number of Swage-Lok fittings used on the refrigerant
piping. If a leak is detected at any of these fittings, tighten
Terminals 2 and 3 of TB2 have been provided for a
field-supplied remote alarm (ALM). If an audible alarm is
installed, an alarm shutoff is also recommended. Contacts
are rated for 125 va at either 115 or 230 v control power. See
Fig. 13.
1
outside nut ⁄8 turn.
Terminals 4 and 5 of TB2 have been provided for a
field-supplied chilled water (fluid) pump relay (CWP). A
field-supplied power supply of appropriate voltage must be
provided. Contacts are rated for 125 va at either 115 or
230 v control power. See Fig. 13.
Terminals 1 and 6 of TB2 have been provided for a
field-supplied control relay for the remote condenser (30HXA)
or a condenser pump relay (30HXC). A field-supplied power
supply of appropriate voltage must be provided.
DO NOT OVERTIGHTEN THESE FITTINGS. Over-
tightening will result in the tube being crushed and will
cause a refrigerant system leak.
30HXA UNITS — These units are shipped with a holding
charge of R-134a. Leak test and dehydrate the complete sys-
tem (including both field and factory installed piping).
Step 7 — Refrigerant Charge
Step 5 — Install Accessories
IMPORTANT: These units are designed for use with
R-134a only. DO NOT USE ANY OTHER refrig-
erant in these units without first consulting your
Carrier representative.
ELECTRICAL — Several optional control accessories are
available to provide the following features:
• control transformer
• cooler pump/flow switch interlock
• cooler pump control
• expanded display panel
• remote alarm
The liquid charging method is recommended for com-
plete charging or when additional charge is required.
• remote on-off
• pulldown control
• occupancy scheduling
• demand limit control
• temperature reset (from occupied space or outdoor-air
temperature)
When charging, circulate water through the condens-
er and cooler at all times to prevent freezing. Freezing
damage is considered abuse and may void the Carrier
warranty.
• dual set point control
• condenser water sensors
• level II communications (CCN
[Carrier Comfort Network])
DO NOT OVERCHARGE system. Overcharging re-
sults in higher discharge pressure with higher cooling
fluid consumption, possible compressor damage, and higher
power consumption.
Refer to Start-Up and Operation literature and sepa-
rate accessory installation instructions for additional
information.
26
Download from Www.Somanuals.com. All Manuals Search And Download.
30HXC UNITS — The 30HXC units are shipped from the
factory with a full charge of R-134a. Unit should not need
to be charged at installation unless a leak was detected in
Step 6 — Leak Test Unit section on page 26. If dehydration
and recharging is necessary, use industry standard practices
or refer to Carrier Standard Services Techniques Manual as
required.
NOTE: On the units equipped with economizers
(30HXA161-186), the EXV is located inside the econo-
mizer so the temperature must be measured entering the
economizer (tube entering bottom of economizer).
3. Check for a clear sight glass. If the unit is not fully loaded,
the sight glass might be flashing. This is normal for a
partially-loaded unit.
30HXA UNITS — The 30HXA units are shipped with a hold-
ing charge of R-134a. The complete charge for the 30HXA,
the remote condenser(s), and interconnecting piping must be
field supplied.
Table 6 — 30HXA System Charge for
Start-Up
CIRCUIT A
CHARGE
CIRCUIT B
CHARGE
UNIT
To charge the 30HXA systems:
30HXA
1. Add liquid charge into the cooler using the1⁄4-in. Schrader-
type fitting located on the tube going into the bottom
of the cooler. This fitting is located between the elec-
tronic expansion valve (EXV) (076-146 units) or the
economizer (161-186 units) and the cooler. Add approxi-
mately 2 lb/nominal ton (0.9 kg/nominal kW). This amount
of charge should be sufficient to allow the unit to start.
The approximate system charges are shown in Table 6.
Lb
Kg
Lb
Kg
076
086
096
106
116
126
136
146
161
171
186
75
94
34.0
42.6
51.7
60.8
62.1
62.1
66.7
73.0
86.2
69.9
84.4
75
80
34.0
36.3
36.3
36.3
43.1
52.6
56.7
59.9
59.9
84.4
84.4
114
134
137
137
147
161
190
154
186
80
80
95
116
125
132
132
186
186
2. Raise the compressor discharge to approximately 125 F
(51.7 C) saturated discharge temperature (185 psig
[1276 kPa]) by throttling the condenser air (or water) in-
take. Add charge until there is approximately 18 to 20 F
(10.0 to 11.1 C) of system subcooling (saturated dis-
charge temperature − actual temperature entering the EXV).
27
Download from Www.Somanuals.com. All Manuals Search And Download.
PACKAGED SERVICE TRAINING
Our packaged service training programs provide an excellent way to increase your knowledge of the
equipment discussed in this manual. Product programs cover:
• Unit Familiarization
• Installation Overview
• Maintenance
• Operating Sequence
A large selection of product, theory, and skills programs is available. All programs include a video
cassette and/or slides and a companion booklet. Use these for self teaching or to conduct full training
sessions.
For a free Service Training Material Catalog (STM), call 1-800-962-9212. Ordering instructions are
included.
Copyright 1996 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
PC 903
Catalog No. 563-052
Printed in U.S.A.
Form 30HX-1SI
Pg 28
5-96
Replaces: New
Tab 5c
Download from Www.Somanuals.com. All Manuals Search And Download.
|