Carrier Water Dispenser 30HXA User Manual

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  
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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
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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
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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
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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
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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  
218  
118  
218  
118  
218  
118  
218  
118  
218  
118  
218  
118  
218  
118  
218  
118  
218  
138  
218  
138  
218  
138  
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
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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  
218  
118  
218  
118  
218  
118  
218  
118  
218  
118  
218  
118  
218  
118  
218  
118  
218  
138  
218  
138  
218  
138  
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
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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
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10  
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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  
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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 14-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 14-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 14-in. flare fitting for mak-  
ing this connection. The flare nut is field supplied.  
12  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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 MotormasterIII 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  
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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 the14-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  
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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  
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