Carrier 30HXA, HXC076-186 User Manual
30HXA,HXC076-186
Water-Cooled and Condenserless Chillers
Installation Instructions
50/60 Hz
CONTENTS
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
• 30HXA UNITS
Step 7 — Refrigerant Charge ................26
• 30HXC UNITS
• 30HXA UNITS
IMPORTANT:This equipment generates, uses, and can
radiate radio frequency energy. If not installed and
used in accordance with these instructions, this equipment 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.) Regulations, Subpart J of Part 15, which are designed to
provide reasonable protection against such interference when operated in a commercial environment.
INSTALLATION
Step 1— Inspect Shipment —
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 mechanisms and electronic devices.
Locate unit indoors. When considering unit location, consult 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 .............................. 3ft(914 mm)
Rear ............................... 3ft(914 mm)
Top ............................... 2ft(610 mm)
Ends ............... tube removal at one (either) end;
3 ft (914 mm) at opposite end.
Inspect unit for dam-
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can
be hazardous due to system pressures, electrical components, and equipment location. Only trained, qualified
installers and service mechanics should install, start up, and
service this equipment.
When working on the equipment, observe precautions in
the literature, andontags, stickers, and labels attached to the
equipment.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling, rigging, and setting bulky
equipment.
INTRODUCTION
These instructions cover installation of 30HX liquid chillers with electronic controls and units with factory-installed
options (FIOPSs).
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
Tab 5c
PC 903 Catalog No. 563-052 Printed in U.S.A. Form 30HX-1SI Pg 1 5-96 Replaces: New
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.
Step 2 — Rig and Place Unit
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.
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 gravity 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.
Copy continued on page 9.
LEGEND
K.O. — Knockout
THK — Thick
TYP — Typical
UNIT
30HXC
076
086
096
106
116
126
136
146
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
369 (914).
DIMENSIONS — in. (mm)
ABCDEFGHJK LMNP
102.12
(2594)
102.12
(2594)
102.12
(2594)
102.12
(2594)
132.56
(3367)
132.56
(3367)
132.56
(3367)
132.56
(3367)
45.87
(1165)
45.87
(1165)
37.63
(956)
37.63
(956)
72.12
(1832)
72.12
(1832)
72.12
(1832)
72.12
(1832)
45.87
(1165)
45.87
(1165)
54.12
(1375)
54.12
(1375)
50.63
(1286)
50.63
(1286)
50.63
(1286)
50.63
(1286)
9.87
(251)
9.87
(251)
9.87
(251)
10.47
(266)
9.87
(251)
9.87
(251)
9.87
(251)
9.87
(251)
9.36
(236)
9.36
(236)
9.36
(236)
10.28
(261)
9.36
(236)
9.36
(236)
9.36
(236)
9.36
(236)
43.50
(1105)
43.50
(1105)
43.50
(1105)
45.50
(1156)
43.50
(1105)
43.50
(1105)
43.50
(1105)
43.50
(1105)
15.60
(396)
15.60
(396)
15.60
(396)
15.60
(396)
31.11
(790)
31.11
(790)
31.11
(790)
31.11
(790)
85.15
(2163)
85.15
(2163)
85.15
(2163)
85.15
(2163)
100.66
(2557)
100.66
(2557)
100.66
(2557)
100.66
(2557)
4.00
(102)
4.00
(102)
4.00
(102)
5.00
(127)
4.00
(102)
4.00
(102)
4.00
(102)
4.00
(102)
95.00
(2413)
95.00
(2413)
95.00
(2413)
95.00
(2413)
126.00
(3200)
126.00
(3200)
126.00
(3200)
126.00
(3200)
65.22
(1657)
65.22
(1657)
65.22
(1657)
67.22
(1707)
65.22
(1657)
65.22
(1657)
65.22
(1657)
65.22
(1657)
1.90
(48)
1.90
(48)
1.90
(48)
1.90
(48)
1.70
(43)
1.70
(43)
1.70
(43)
1.70
(43)
47.00
(1194)
47.00
(1194)
47.00
(1194)
47.00
(1194)
62.20
(1580)
62.20
(1580)
62.20
(1580)
62.20
(1580)
30.80
(782)
30.80
(782)
30.80
(782)
30.80
(782)
29.40
(747)
29.40
(747)
29.40
(747)
29.40
(747)
Fig. 1 — Base Unit Dimensions, 30HXC076-146 Units
2
UNIT
30HXC
161
171
186
DIMENSIONS — in. (mm)
ABCD E
72.12
(1832)
61.37
(1559)
61.37
(1559)
50.63
(1286)
61.37
(1559)
61.37
(1559)
2.00
(51)
2.00
(51)
2.00
(51)
63.50
(1588)
63.50
(1588)
63.50
(1588)
31.00
(787)
31.00
(787)
31.00
(787)
Fig. 2 — Base Unit Dimensions, 30HXC161-186 Units
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
369 (914).
LEGEND
K.O. — Knockout
THK — Thick
TYP — Typical
3
LEGEND
K.O. — Knockout
SAE — Society of Automotive
THK — Thick
TYP — Typical
Engineers, U.S.A.
UNIT
30HXA
076
086
096
106
116
126
136
146
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
369 (914).
DIMENSIONS — in. (mm)
ABCDEFGHJKLMNPRSTUV
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
(2594)
102.12
(2594)
102.12
(2594)
102.12
(2594)
132.56
(3367)
132.56
(3367)
132.56
(3367)
132.56
(3367)
(1165)
45.87
(1165)
37.63
(956)
37.63
(956)
72.12
(1832)
72.12
(1832)
72.12
(1832)
72.12
(1832)
(1165)
45.87
(1165)
54.12
(1375)
54.12
(1375)
50.63
(1286)
50.63
(1286)
50.63
(1286)
50.63
(1286)
(706)
27.81
(706)
27.81
(706)
28.41
(721)
27.81
(706)
27.81
(706)
27.81
(706)
27.81
(706)
(236)
9.36
(236)
9.36
(236)
10.28
(261)
9.36
(236)
9.36
(236)
9.36
(236)
9.36
(236)
(1105)
43.50
(1105)
43.50
(1105)
45.50
(1156)
43.50
(1105)
43.50
(1105)
43.50
(1105)
43.50
(1105)
(396)
15.60
(396)
15.60
(396)
15.60
(396)
31.11
(790)
31.11
(790)
31.11
(790)
31.11
(790)
(2163)
85.15
(2163)
85.15
(2163)
85.15
(2163)
100.66
(2557)
100.66
(2557)
100.66
(2557)
100.66
(2557)
(102)
4.00
(102)
4.00
(102)
5.00
(127)
4.00
(102)
4.00
(102)
4.00
(102)
4.00
(102)
(2413)
95.00
(2413)
95.00
(2413)
95.00
(2413)
126.00
(3200)
126.00
(3200)
126.00
(3200)
126.00
(3200)
(1657)
65.22
(1657)
65.22
(1657)
67.22
(1707)
65.22
(1657)
65.22
(1657)
65.22
(1657)
65.22
(1657)
(354)
13.93
(354)
22.15
(563)
22.15
(563)
40.16
(1020)
40.16
(1020)
40.16
(1020)
40.16
(1020)
(1511)
59.48
(1511)
42.77
(1086)
42.77
(1086)
64.23
(1631)
64.23
(1631)
64.23
(1631)
64.23
(1631)
(145 )
5.72
(145)
5.72
(145)
5.87
(149)
5.72
(145)
5.72
(145)
5.72
(145)
5.72
(145)
(1164)
45.81
(1164)
54.06
(1373)
54.06
(1373)
72.06
(1830)
72.06
(1830)
72.06
(1830)
72.06
(1830)
(1175)
46.25
(1175)
38.00
(965)
38.00
(965)
51.01
(1296)
51.01
(1296)
51.01
(1296)
51.01
(1296)
(61)
2.40
(61)
2.40
(61)
2.40
(61)
2.30
(58)
2.30
(58)
2.30
(58)
2.30
(58)
(1179)
46.40
(1179)
46.40
(1179)
46.40
(1179)
61.00
(1549)
61.00
(1549)
61.00
(1549)
61.00
(1549)
35.00
(889)
35.00
(889)
35.00
(889)
35.00
(889)
34.30
(871)
34.30
(871)
34.30
(871)
34.30
(871)
Fig. 3 — Base Unit Dimensions, 30HXA076-146 Units
4
LEGEND
K.O. — Knockout
SAE — Society of Automotive
THK — Thick
TYP — Typical
Engineers, U.S.A.
UNIT
30HXA
161
171
186
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
369 (914).
DIMENSIONS — in. (mm)
ABCDEFGHJ
72.12
(1832)
61.37
(1559)
61.37
(1559)
50.63
(1386)
61.37
(1559)
61.37
(1559)
48.56
(1233)
43.25
(1099)
43.25
(1099)
46.62
(1184)
46.62
(1184)
46.62
(1184)
72.06
(1830)
61.31
(1572)
61.31
(1572)
51.00
(1295)
61.75
(1568)
61.75
(1568)
2.70
(69)
2.70
(69)
2.70
(69)
62.50
(1588)
62.50
(1588)
62.50
(1588)
35.20
(894)
35.20
(894)
35.20
(894)
Fig. 4 — Base Unit Dimensions, 30HXA161-186 Units
5
WEIGHT DISTRIBUTION AT EACH MOUNTING PLATE,
30HXC UNITS — Lb (Kg)
UNIT
30HXC
076
086
096
106
116
126
136
146
161
171
186
NOTE: See Fig. 1-4 for center of gravity details.
123456
738
(335)
738
(335)
686
(311)
730
(331)
728
(330)
738
(335)
758
(344)
763
(346)
817
(371)
936
(425)
962
(436)
MOUNTING PLATE NO.
943
(428)
947
(430)
968
(439)
1028
(466)
1114
(505)
1127
(511)
1176
(533)
1182
(536)
1272
(577)
1318
(598)
1361
(617)
595
(270)
597
(271)
693
(314)
744
(337)
777
(352)
780
(354)
811
(368)
815
(370)
908
(412)
840
(381)
860
(390)
1110
(503)
1112
(504)
1027
(466)
1073
(487)
1053
(478)
1061
(481)
1083
(491)
1085
(492)
1219
(553)
1379
(626)
1410
(640)
1418
(643)
1427
(647)
1447
(656)
1510
(685)
1615
(733)
1628
(738)
1689
(766)
1697
(770)
1890
(857)
1946
(883)
1996
(905)
(406)
(409)
1034
(469)
1092
(495)
1127
(511)
1131
(513)
1171
(531)
1172
(532)
1346
(610)
1241
(563)
1265
(574)
Fig. 5 — Rigging Information
896
902
WEIGHT DISTRIBUTION AT EACH MOUNTING PLATE,
30HXA UNITS — Lb (Kg)
UNIT
30HXA
076
086
096
106
116
126
136
146
161
171
186
123456
555
(252)
555
(252)
509
(231)
555
(252)
530
(240)
540
(245)
548
(249)
551
(250)
560
(254)
627
(284)
648
(294)
MOUNTING PLATE NO.
793
(360)
798
(362)
808
(367)
869
(394)
895
(406)
905
(410)
926
(420)
930
(422)
965
(438)
968
(439)
1004
(455)
418
(190)
418
(190)
493
(224)
541
(245)
540
(245)
541
(245)
555
(252)
555
(252)
598
(271)
534
(242)
552
(250)
926
(420)
928
(421)
848
(385)
896
(406)
855
(388)
864
(392)
8743
(396)
883
(400)
954
(433)
1072
(486)
1110
(504)
1326
(601)
1340
(608)
1350
(612)
1410
(640)
1456
(660)
1468
(666)
1498
(679)
1506
(683)
1650
(748)
1658
(752)
1703
(772)
699
(317)
705
(320)
827
(375)
880
(399)
887
(402)
887
(402)
908
(412)
908
(412)
1025
(465)
918
(416)
939
(426)
6
Table 1A — Physical Data, English
UNIT SIZE 076 086 096 106 116 126 136 146 161 171 186
UNIT WEIGHT (lb)
Fluid Cooled (HXC) 5700 5723 5855 6177 6415 6465 6688 6718 7452 7660 7854
Condenserless (HXA) 4717 4744 4835 5151 5162 5205 5308 5333 5752 5777 5946
COMPRESSORS Semi-Hermetic, Twin Screw
Quantity 222222 2 2 2 2 2
Nominal Capacity per
Compressor (tons)
Economizer No No No No No No No No Yes Yes Yes
No. Capacity Steps
Standard 666666 6 6 6 6 6
Optional (maximum) 888888 8 8 8 8 8
Minimum Step Capacity (%)
Standard 20 20 20 20 20 20 20 20 20 20 20
Optional 10 10 10 10 10 10 10 10 10 10 10
REFRIGERANT TYPE R-134a
Charge* (lb)
Circuit A/Circuit B
COOLER TYPE Shell and Tube with Enhanced Copper Tubes
Part No. 10HX400− 001 001 002 010 007 007 006 006 104 012 013
Net Fluid Volume (gal) 17.0 17.0 19.0 22.6 21.4 21.4 24.0 24.0 28.5 28.5 33.4
Maximum Refrigerant Pressure
(psig)
Maximum Fluid-Side Pressure
(psig)
Fluid Connections (in.) Steel Weld Couplings
Inlet and Outlet 444544 4 4 5 5 5
Drain (NPT)
30HXA OIL SEPARATOR
Part No. 09RX400− 007 007 008 008 009 009 009 009 009 010 010
Maximum Refrigerant Pressure
(psig)
Refrigerant Connections (in.)
Discharge 2
Liquid 11⁄
CONDENSER (HXC) Shell and Tube with Enhanced Copper Tubes
Part No. 09RX400− 001 001 002 002 003 003 004 004 005 006 006
Net Fluid Volume (gal) 16.8 16.8 18.3 18.3 23.9 23.9 27.5 27.5 30.6 37.6 37.6
Maximum Refrigerant Pressure
(psig)
Maximum Water-Side Pressure
(psig)
Water Connections (in.) Steel Weld Couplings
Inlet and Outlet 555555 5 5 5 5 5
Drain (NPT)
*Charges listed are for 30HXC units. The 30HXA units are shipped with a holding charge only.
39/39 46/39 56/39 66/39 66/46 66/56 80/56 80/66 80/56 66/80 80/80
55/55 66/55 79/55 95/55 95/66 95/79 114/79 114/95 130/90 109/130 130/130
220 220 220 220 220 220 220 220 220 220 220
300 300 300 300 300 300 300 300 300 300 300
1
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
⁄
1
2
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
320 320 320 320 320 320 320 320 320 320 320
1
⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
13⁄
8
13⁄
8
8
220 220 220 220 220 220 220 220 220 220 220
300 300 300 300 300 300 300 300 300 300 300
1
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
⁄
1
2
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
21⁄
13⁄
1
⁄
2
8
8
1
⁄
2
7
Table 1B — Physical Data, SI
UNIT SIZE 076 086 096 106 116 126 136 146 161 171 186
UNIT WEIGHT (Kg)
Fluid Cooled (HXC) 2586 2596 2656 2802 2910 2933 3034 3047 3380 3476 3563
Condenserless (HXA) 2140 2152 2193 2336 2341 2361 2408 2419 2609 2620 2697
COMPRESSORS Semi-Hermetic, Twin Screw
Quantity 22222222222
Nominal Capacity per
Compressor (kW)
Economizer No No No No No No No No Yes Yes Yes
No. Capacity Steps
Standard 66666666666
Optional (maximum) 88888888888
Minimum Step Capacity (%)
Standard 20 20 20 20 20 20 20 20 20 20 20
Optional 10 10 10 10 10 10 10 10 10 10 10
REFRIGERANT TYPE R-134a
Charge* (Kg)
Circuit A/Circuit B
COOLER TYPE Shell and Tube with Enhanced Copper Tubes
Part No. 10HX400− 001 001 002 010 007 007 006 006 104 012 013
Net Fluid Volume (L) 64.3 64.3 71.9 85.5 81.0 81.0 90.8 90.8 107.9 107.9 126.4
Maximum Refrigerant
Pressure (kPa)
Maximum Fluid-Side
Pressure (kPa)
Fluid Connections (in.) Steel Weld Couplings
Inlet and Outlet 44454444555
Drain (NPT)
30HXA OIL SEPARATOR
Part No. 09RX400− 007 007 008 008 009 009 009 009 009 010 010
Maximum Refrigerant
Pressure (kPa)
Refrigerant Connections (in.)
Discharge 2
Liquid 11⁄
CONDENSER (HXC) Shell and Tube with Enhanced Copper Tubes
Part No. 09RX400− 001 001 002 002 003 003 004 004 105 006 006
Net Fluid Volume (L) 63.6 63.6 69.3 69.3 90.5 90.5 104.1 104.1 115.8 142.3 142.3
Maximum Refrigerant
Pressure (kPa)
Maximum Water-Side
Pressure (kPa)
Water Connections (in.) Steel Weld Couplings
Inlet and Outlet 55555555555
Drain (NPT)
*Charges listed are for 30HXC units. The 30HXA units are shipped with a holding charge only.
137/137 162/137 197/137 232/137 232/137 232/197 281/197 281/232 281/197 232/281 281/281
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
1517 1517 1517 1517 1517 1517 1517 1517 1517 1517 1517
2068 2068 2068 2068 2068 2068 2068 2068 2068 2068 2068
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
2205 2205 2205 2205 2205 2205 2205 2205 2205 2205 2205
1
⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
21⁄
8
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
11⁄
8
13⁄
8
13⁄
21⁄
8
13⁄
1517 1517 1517 1517 1517 1517 1517 1517 1517 1517 1517
2068 2068 2068 2068 2068 2068 2068 2068 2068 2068 2068
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
8
8
8
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 accommodate 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.
Areas where unit mounting points will be located must be
level to within1⁄16in. 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 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 connection 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 piping to reduce vibration transmission. Offsetthe piping to permit removal of the cooler head for maintenance. Install pipe
hangers where needed. Make sure no weight or stress is placed
on the water nozzle.
To install cooler piping:
1. Remove bolts on weld flanges, and remove flanges from
cooler fluid heads.
Remove the weld flanges before welding piping to
the flanges. Refer to Fig. 1-4 for weld flange locations. Failure to remove the flanges may damage 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 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 pressure drop applications.
Tighten all cooler head bolts to 250 ft-lb (339 N-m)
before filling system with water (or brine).
6. Install field-supplied differentialflow 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
differentialflow switch into the inlet line piping as shown
in Fig. 8.
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 leaving fluid pipe should extend at least 2 in. (50 mm) into
the pipe.
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-offand 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 complete drainage of the system.
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 corrosionresistant antifreeze solution to prevent cooler freeze up.
PREPARATIONFOR 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 recommended using inhibited ethylene glycol or other suitable
corrosion-resistant antifreeze solution and electric heater tapes.
Heater tapes should have a rating for area ambient temperatures and be covered with a suitable thickness of closed-cell
insulation. Route power for the heater tapes from a separatelyfused 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 corrosionresistant 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 recommended 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.
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 shutoffvalves to the drain line before filling the system with fluid.
9
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