Emerson Liebert DS 28-105kW Technical Specifications
Liebert® DS™ Thermal Management Unit
System Design Manual - 28-105kW (8-30 Tons), Downflow/Upflow, 60Hz
Floor Mounted, Air-Cooled, Water/Glycol-Cooled, GLYCOOL Economizer Coil, Dual-Cool DX with
Secondary Chilled Water Coil
TABLE OF CONTENTS
LIEBERT DS MODEL NUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.0 COOLING CONFIGURATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.0 BLOWER CONFIGURATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3.0 AIR-COOLED SYSTEMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.1 Capacity and Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Standard Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Optional Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 Optional Low-Voltage Terminal Package Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.5 Dimensions—Liebert DS 028-042, Downflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . 16
3.6 Dimensions—Liebert DS 053-077, Downflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . 23
3.7 Dimensions—Liebert DS 105, Downflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . . . . . 32
3.8 Dimensions—Liebert DS 028-042, Upflow, Air-Cooled Models. . . . . . . . . . . . . . . . . . . . . . . 38
3.9 Dimensions—Liebert DS 053-077, Upflow, Air-Cooled Models. . . . . . . . . . . . . . . . . . . . . . . 45
3.10 Dimensions—Liebert DS 105, Upflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . . . . . . . 52
3.11 Heat Rejection—Liebert MC, Fin/Tube and Piggyback Condensers. . . . . . . . . . . . . . . . . . . 57
3.11.1 Liebert MC Microchannel Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.12 Piping—Liebert MC™ Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3.12.1 Fin/Tube Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
3.12.2 Piggyback Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
3.13 Ancillary Items—Air-Cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
4.0 WATER-COOLED, GLYCOL-COOLED AND GLYCOOL SYSTEMS . . . . . . . . . . . . . . . . . . . . .91
4.1 Capacity and Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
4.2 Standard Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
4.3 Optional Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
4.4 Optional Low-Voltage Terminal Package Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
4.5 Dimensions—Liebert DS 028-042, Downflow, Water/Glycol/GLYCOOL Models . . . . . . . . 107
4.6 Dimensions—Liebert DS 053-077, Downflow, Water/Glycol/GLYCOOL Models . . . . . . . . 111
4.7 Dimensions—Liebert DS 105, Downflow, Water/Glycol/GLYCOOL-Cooled Models . . . . . 116
4.8 Dimensions—Liebert DS 028-042, Upflow, Water/Glycol/GLYCOOL-Cooled Models . . . . 121
4.9 Dimensions—Liebert DS 053-077, Upflow, Water/Glycol/GLYCOOL-Cooled Models . . . . 125
4.10 Dimensions—Liebert DS 105, Upflow, Water/Glycol/GLYCOOL Models. . . . . . . . . . . . . . 129
4.11 Heat Rejection—Drycoolers and Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
4.11.1 Drycooler Selection—Prop Fan Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
4.11.2 Dimensions—Prop Fan Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
4.11.3 Electrical Data—Prop Fan Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
4.11.4 Piping—Prop Fan Drycoolers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
4.11.5 Pump Packages & Expansion Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
4.11.6 Drycooler Selection—Indoor Piggyback Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
4.11.7 Weights and Dimensions—Indoor Piggyback Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
4.11.8 Electrical Data—Piggyback Drycoolers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
4.11.9 System Piping—Piggyback Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
4.12 Ancillary Items—Water-Cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
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5.0 GUIDE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
1.0 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
2.0 PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
3.0 EXECUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
ii
LIEBERT DS MODEL NUMBER
Cooling Type
A = Air-Cooled
D = Dual-Cooling, Air-Cooled
W = Water/Glycol
K = GLYCOOL (Liebert Economizer Coil)
H = Dual-Cooling, Water-Cooled
Nominal kW
028, 035, 042, 053, 070, 077, 105
(8, 10, 12, 15, 20, 22, 30 tons)
Air Distribution
DS = Downflow Standard
VS = Upflow Standard
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
DS035AUA0EI****
Compressor
U - Semi-Hermetic with Four-Step, R-407C
S - Scroll, R-407C
D - Digital Scroll, R-407C
Fan Type
0 = Centrifugal Fans
1 = Electronically
Commutated (EC)
Fans
Humidification
0 - None
I - Infrared
S - Steam Generating
Canister
Reheat Type
0 - None
E - 3-Stage Electric
S - SCR
Voltag e
A - 460/3/60
B - 575/3/60
C - 208/3/60
D - 230/3/60
2 - 380/3/60
Factory Configuration
Number
Liebert DS Model Number
Not all combinations of options are available on all units.
Digital Scroll Compressors
• Not available on 077 and 105 models
• Not compatible with SCR reheat because digital scroll provides variable capacity control
EC Fans, Direct-Drive
• Not available on upflow (VS) configuration
• Liebert Econ-O-Coil
Steam Generating Canister Humidifier
• Not available on upflow (VS) configurations
• Not available on EC fan configurations
575 Volt Option Limitations
• Digital scroll compressors available only on 053, 070 models
GLYCOOL Liebert Economizer Models
• 105 model requires semi-hermetic compressors only, so as to prevent potential coil freezing
Turning Vanes
• Not available on floor stands 6" (152.4mm) tall
• Not available or required on units with EC fans
™
not available on 028, 035, 042 models with 208/230V
1Liebert
®
DS
™
1.0 COOLING CONFIGURATIONS
AIR-COOLED
Air-cooled unit piping is spun closed from the
factory and contains a nitrogen holding charge.
Each installation requires field-supplied
refrigerant and piping to a condenser.
GLYCOL-COOLED
Glycol-cooled units are factory-charged and
tested. Field-supplied and field-installed piping is
required from the unit to the drycooler and pump
package.
WATER-COOLED
Water-cooled units are factory-charged and
tested. Field-supplied and field-installed
water piping is required from the unit to the
cooling tower.
GLYCOOL-INTEGRATED FLUID ECONOMIZER
GLYCOOL units are factory-charged and tested. Field-supplied
and field-installed piping is required from the unit to the
drycooler and pump package. An additional Liebert Economizer
coil is included for use when fluid temperatures are sufficiently
low (below room temperature). Economizer cooling is provided
by circulating cold glycol through this second coil, reducing or
eliminating compressor operation.
DUAL-COOL
This system has all of the features of a compressorized
system, but adds a second cooling coil that is connected
to a source of chilled water. Cooling is provided by
circulating chilled water, when available, through this
second coil and reducing compressor operation.
NOTE
All field-installed piping must comply with applicable local, state and federal codes.
Cooling Configurations
Liebert® DS
™
2
2.0 BLOWER CONFIGURATIONS
Front
Filter
Coil
Blower
Raised
Floor
Return Air
Supply
Air
Front Supply, EC Fans
Front
Filter
Coil
Blower
Raised
Floor
Return Air
Supply
Air
Rear Supply, EC Fans
Applicable to installations
without raised floors
Applicable to installations
without raised floors
Front
Filter
Coil
Blower
Floor
Stand
(optional )
Raised
Floor
Return Air
Supply
Air
Front
Filter
Coil
Blower
Floor Stand
(optional )
Raised
Floor
Return Air
Supply Air
Supply
Air
Under-Floor Supply, EC Fans
Bottom Supply, EC Fans
Figure 1 Blower configurations—Downflow, front and rear supply models, EC fans
Blower Configurations
Figure 2 Blower configurations—Downflow, bottom supply and under-floor supply models, EC fans
3Liebert
®
DS
™
Blower Configurations
Front
Filter
Coil
Blower
Floor
Stand
(optional )
Raised
Floor
Return Air
Supply Air
Turning Vane
(optional )
Front Supply, Forward-Curved Fans
Front
Filter
Coil
Blower
Floor
Stand
(optional )
Raised
Floor
Return Air
Supply Air
Turning Vane
(optional )
Rear Supply, Forward-Curved Fans
Figure 3 Blower configurations—Downflow, front and rear supply models, centrifugal fans
Liebert® DS
™
4
Figure 4 Blower configurations—Upflow, front return models, centrifugal fans
Front
Coil
Return
Air
Supply Air
Blow er
Filter
Front
Coil
Return
Air
Supply Air
Blow er
Filter
Top Supply, Front Throw Forward-Curved Fans Top Supply, Rear Throw Forward-Curved Fans
Front
Coil
Supply Air
Blower
Filter
Return
Air
Ductwork
Front
Coil
Supply Air
Blower
Filter
Return
Air
Ductwork
Top Supply, Rear Throw, Forward-Curved FansTop Supply, Front Throw, Forward-Curved Fans
Blower Configurations
Figure 5 Blower configurations—Upflow, rear return models, centrifugal fans
5Liebert
®
DS
™
Air-Cooled Systems
3.0 AIR-COOLED SYSTEMS
3.1 CAPACITY AND PHYSICAL DATA
Table 1 Performance Data—Air-cooled, EC fan, under-floor discharge
Model Size 028 035 042 053 070 077 105
CAPACITY DATA with EC Fans
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Semi Hermetic Compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 34.1 (116.4) 42.1 (143.6) 47.9 (163.6) 61.7 (210.6) 72.4 (247.1) 79.2 (270.3) 103.3 (352.5)
Sensible kW
(kBTUH)
80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 32.4 (110.5) 40.1 (136.8) 45.7 (156.1) 58.3 (198.9) 68.8 (234.8) 75.3 (257.1) 99.1 (338.2)
Sensible kW
(kBTUH)
75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 30.9 (105.3) 38.3 (130.8) 43.8 (149.5) 55.4 (189) 65.6 (223.9) 72 (245.8) 95.2 (325)
Sensible kW
(kBTUH)
72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 30 (102.5) 37.3 (127.4) 42.7 (145.8) 53.8 (183.6) 63.9 (218) 70.2 (239.7) 93.1 (317.6)
Sensible kW
(kBTUH)
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll or Digital Scroll Compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 35.4 (120.8) 40.2 (137.1) 45.5 (155.3) 63.5 (216.8) 75.8 (258.6) 81.3 (277.6) 103.6 (353.7)
Sensible kW
(kBTUH)
80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 33.4 (113.9) 38.2 (130.4) 43.4 (148.1) 60.5 (206.5) 72.7 (248) 77.9 (265.8) 99.7 (340.2)
Sensible kW
(kBTUH)
75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 31.6 (107.8) 36.5 (124.7) 41.6 (141.9) 57.8 (197.4) 69.9 (238.4) 74.9 (255.5) 96 (327.8)
Sensible kW
(kBTUH)
72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 30.6 (104.3) 35.6 (121.5) 40.6 (138.5) 56.4 (192.6) 68.3 (233) 73.2 (249.9) 93.8 (320.3)
Sensible kW
(kBTUH)
Standard Air
Volume,
CFM (CMH)
0.2" External Static
Standard Fan
Motor,
Nominal kW
(total for all fans)
Number of Fans 1 1 1 2 2 2 3
1. Capacity data is rated and factory-certified per ASHRAE 127-2012 with a 5% tolerance.
2. Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
3. Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only.
34 (116) 41.4 (141.2) 47.9 (160.9) 61.6 (210.2) 72 (245.9) 78.9 (269.2) 98.9 (337.5)
31 (105.9) 37.5 (128.1) 45.7 (146.2) 56.8 (193.9) 66.4 (226.6) 72.9 (248.8) 90 (307.2)
27.5 (93.9) 33.3 (113.8) 43.8 (129.9) 50.8 (173.3) 59 (201.3) 64.9 (221.5) 80 (273.1)
25.3 (86.3) 30.7 (104.8) 42.7 (119.7) 46.7 (159.3) 54.2 (184.9) 59.7 (203.6) 73.8 (251.8)
Scroll Compressors Only
35.2 (120) 40 (136.4) 45.3 (154.7) 63.2 (215.7) 74.9 (255.6) 80.6 (275.1) 99.1 (338.3)
31.8 (108.7) 36.5 (124.6) 41.6 (141.9) 58.3 (199.1) 68.9 (235) 74.1 (253) 90.3 (308.2)
28.2 (96.1) 32.5 (110.8) 37 (126.3) 52 (177.6) 61.4 (209.4) 65.9 (224.9) 80.4 (274.3)
25.8 (88.2) 29.9 (102.1) 34.1 (116.3) 47.9 (163.6) 56.5 (192.9) 60.6 (206.9) 74.1 (253)
FAN SECTION - Downflow Models - EC Fans Under Floor
4,400
(7,476)
2.8 2.8 2.8 2.5 4.0 5.9 7.8
5,200
(8,835)
6200
(10533.9)
8,000
(13,592)
9,600
(16,310)
11,000
(18,689)
13,700
(23,276)
Liebert® DS
™
6
Air-Cooled Systems
Table 2 Performance data—Air-cooled, centrifugal fan
Model Size 028 035 042 053 070 077 105
CAPACITY DATA with Centrifugal Fans
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Semi Hermetic Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 40.3 (137.6) 41.0 (140.0) 46.2 (157.6) 60.2 (205.3) 70.5 (240.6) 76.9 (262.6) 101.3 (345.6)
Sensible kW
(kBTUH)
38.0 (129.6) 40.3 (137.6) 45.5 (155.3) 59.7 (203.8) 69.7 (237.9) 76.2 (259.9) 96.6 (329.6)
80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 38.6 (131.8) 39.1 (133.3) 43.9 (150) 57.2 (195.1) 67.2 (229.3) 73.4 (250.6) 97.1 (331.5)
Sensible kW
(kBTUH)
34.3 (117.2) 36.5 (124.6) 41.2 (140.5) 54.8 (187.1) 63.8 (217.7) 69.8 (238.2) 87.7 (299.4)
75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 37.1 (126.5) 37.3 (127.2) 42 (143.3) 54.4 (185.6) 64.1 (218.9) 70.2 (239.7) 93.3 (318.4)
Sensible kW
(kBTUH)
30.5 (104.2) 32.3 (110.3) 36.4 (124.2) 48.7 (166.2) 56.5 (192.9) 61.8 (210.9) 77.8 (265.4)
72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 36.1 (123.3) 36.3 (123.8) 40.9 (139.6) 52.9 (180.6) 62.5 (213.2) 68.6 (234) 91.0 (310.6)
Sensible kW
(kBTUH)
28.2 (96.3) 29.7 (101.3) 33.4 (113.9) 44.7 (152.7) 51.9 (177.2) 56.7 (193.6) 71.5 (244.1)
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll or Digital Scroll Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 34.1 (116.4) 39.7 (135.5) 43.7 (149.2) 62.1 (212.1) 74.0 (252.6) 79.1 (270.1) 101.6 (346.9)
Sensible kW
(kBTUH)
40.1 (136.9) 34.0 (116.0) 43.6 (148.9) 61.3 (209.3) 72.3 (246.6) 77.8 (265.6) 96.8 (330.4)
80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 32.4 (110.5) 38.3 (130.8) 41.6 (141.9) 59.3 (202.5) 71.2 (243) 75.9 (259) 97.7 (333.5)
Sensible kW
(kBTUH)
31.0 (105.9) 36.1 (123.2) 39.9 (136.1) 56.1 (191.6) 65.9 (225) 71.1 (242.6) 88.0 (300.4)
75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 30.9 (105.3) 36.7 (125.4) 39.8 (135.7) 56.9 (194.2) 68.5 (233.9) 73 (249.3) 94.1 (321.1)
Sensible kW
(kBTUH)
27.5 (93.9) 32.1 (109.4) 35.3 (120.6) 49.9 (170.4) 58.6 (200.1) 63.1 (215.2) 78.1 (266.6)
72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 30.0 (102.5) 35.9 (122.4) 38.8 (132.3) 55.5 (189.5) 67 (228.7) 71.4 (243.7) 91.9 (313.7)
Sensible kW
(kBTUH)
25.3 (86.3) 29.5 (100.6) 32.4 (110.5) 46.0 (157) 54.0 (184.3) 58.0 (197.8) 71.9 (245.5)
FAN SECTION - Downflow Models - Fixed Pitch, Two Belts
Standard Air
Volume - CFM
(CMH) 0.2"
4,400
(7,476)
5,200
(8,835)
6,300
(10,704)
7,500
(12,743)
9,000
(15,291)
external static
Standard Fan
Motor hp (kW)
2 (1.5) 3 (2.2) 5.0 (3.7) 3 (2.2) 5 (3.7) 7.5 (5.6) 10.0 (7.5)
Number of Fans 1 1 1 2 2 2 3
1. Capacity data is rated and factory-certified per ASHRAE 127-2012 with a 5% tolerance.
2. Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
3. Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only
Scroll Compressors Only
10,400
(17,670)
13,700
(23,276)
®
7Liebert
DS
™
Air-Cooled Systems
Table 3 Physical data—Air-cooled systems
Model Size 028 035 042 053 070 077 105
EVAPORATOR COIL- A-Frame - Copper Tube/Aluminum Fin
Face Area, sq. ft. (sq. m)
Rows of Coil
Electric Reheat - Three-Stage, Stainless Steel Fin Tubular, capacity does not include fan motor heat
Capacity - kW (kBTUH) - Standard
Selection
Capacity, kW (kBTUH) - Optional
Selection
Electric Reheat - SCR Control, Stainless Steel Fin Tubular (optional selection)
Capacity, kW (kBTUH)
Infrared Humidifier (Steam canister humidifiers available on downflow models with centrifugal fans)
Capacity, lb./hr. (kg/h)
FILTER SECTION - Disposable Type - Nominal Sizes and Quantities, Standard MERV 8 or Optional MERV 11
(filter types cannot be mixed, must be all MERV 8 or all MERV 11)
Downflow Models
Quantity
Nominal Size, inches
Upflow Models (Front & Rear return) Filters located in separate filter box on rear return, located on lower unit panel
Quantity
Nominal Size, inches 25x20 25x20 25x20 25x20 25x20 25x20 25x20
PIPING CONNECTION SIZES - Air-cooled Liebert DS Indoor Unit (Not External Line Sizes)
Liquid Line, O.D. Copper (2/unit) 1/2 1/2 1/2 5/8 5/8 5/8 5/8
Hot Gas Line, O.D. Copper (2/unit) 5/8 5/8 5/8 7/8 7/8 7/8 1-1/8
Infrared Humidifier, O.D. Copper
Condensate Drain, FPT
Condensate Drain w/Optional
Condensate Pump, OD
OUTDOOR AIR-COOLED CONDENSER, STANDARD 95°F AMBIENT SELECTION; see Tables 44 and 49 for other selections
Model (R-407C refrigerant) MCM080_8 MCM080_8 MCM080_8 MCM080_8 MCM080_8 MCM080_8 MCL110_8
Number of Fans 222 2 2 2 2
DUAL-COOL UNITS DATA, Water (0% Glycol), Net Capacity Data kW (kBTUH)
CAUTION: CuNi coil option must be specified when Econ-O-Coil is applied to open water tower.
75°F DB, 61.1 WB (23.9°C DB, 16.2°C WB) 45% RH, 45°F EWT, 55°F LWT Based on Centrifugal Fans
Total Capacity, kW (kBTUH)
Sensible Capacity, kW (kBTUH) 24.9 (85) 28.8 (98.2) 31.6 (107.8) 46 (157.1) 51.7 (176.4) 54.3 (185.4)
Flow Rate GPM (I/m) @ 10°F Rise 19 (71.9) 22.4 (84.8) 25.5 (96.5) 36.4 (138) 41.7 (158) 46 (174)
Pressure Drop, ft. (kPa), valve, coil 6.1 (18.23) 8.3 (24.81)
Airflow, CFM (CMH) 4400 (7475) 5500 (9344)
Econ-O-Coil fluid volume, gal (l)
Capacity data is rated per ASHRAE 127-2012 with a 5% tolerance
17.1 (1.6) 17.1 (1.6) 17.1 (1.6) 24.7 (2.3) 24.7 (2.3) 24.7 (2.3) 32.3 (3.0)
333 3 3 3 3
REHEAT SECTION
15.0 (51.2) 15.0 (51.2) 15.0 (51.2) 25.0 (85.3) 25.0 (85.3) 25.0 (85.3) 30.0 (102.4)
10.0 (34.1) 10.0 (34.1) 10.0 (34.1) 15.0 (51.2) 15.0 (51.2) 15.0 (51.2) 20.0 (68.3)
15.0 (51.2) 15.0 (51.2) 15.0 (51.2) 25.0 (85.3) 25.0 (85.3) 25.0 (85.3) 30.0 (102.4)
HUMIDIFIER SECTION
11.0 (5.0) 11.0 (5.0) 11.0 (5.0) 22.0 (10.0) 22.0 (10.0) 22.0 (10.0) 22.0 (10.0)
333 4 4 4 4
2 @ 25x20
1 @ 25x16
444 6 6 6 8
1/4 1/4 1/4 1/4 1/4 1/4 1/4
3/4 3/4 3/4 3/4 3/4 3/4 3/4
1/2 1/2 1/2 1/2 1/2 1/2 1/2
26.2 (89.2) 29.8 (101.6) 32.2 (109.8) 49.9 (170.4) 55.3 (188.8) 57.7 (196.8)
2 @ 25x20
1 @ 25x16
2 @ 25x20
1 @ 25x16
10.50 (31.39) 10.40 (31.09)
6600
(11213)
4 @ 25x20 4 @ 25x20 4 @ 25x20 4 @ 25x20
8000
(13592)
13.3 (39.8) 15.9 (47.6)
9600
(16310)
11000
(18689)
75.8 (258.8)
73 (249.1)
59.4 (225)
15.9 (47.5)
13,700
(23,256)
Fluid Volumes
5 (19.0) 5 (19.0) 5 (19.0) 8 (30.4) 8 (30.4) 8 (30.4) 10 (38.0)
Liebert® DS
™
8
Table 4 Electrical data—Air-cooled systems with EC fans
Air-Cooled Systems
Reheat
Options
Humid-
ifier
Options Infrared Infrared None None Humidifier No Humidifier
Model
#
Volts 208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575
FLA 67.3 64.8 32.1 25.5 56.3 54.1 26.9 24.2 67.3 64.8 32.1 25 43 43 21.1
DS028
WSA 82 78.9 39.2 31.9 60.6 58.4 29.1 25.9 82 78.9 39.2 30.5 47.3 47.3 23.3
OPD 80804030707035308080403060 6030
FLA 70.7 68.2 33.4 25.5 63.1 60.9 29.5 25.2 70.7 68.2 33.4 25.5 49.8 49.8 23.7
DS035
WSA 86.3 83.2 40.8 31.9 68.3 66.1 32 27.1 86.3 83.2 40.8 31.1 55 55 26.2
OPD 90904530808040309090453070 7035
FLA 78.2 75.9 37.7 33 78.1 75.9 37.7 33 78.2 75.7 37.5 29.4 64.8 64.8 31.9
DS042
WSA 95.7 92.5 46 36 85.2 83 41.2 35.8 95.7 92.5 46 36 71.9 71.9 35.4
OPD 110 110 50 45 110 110 50 45 110 110 50 40 100 100 45
FLA 119.9 116 57.1 43.5 109.2 104.8 52.4 42 119.9 116 57.1 43.5 82.6 82.6 40.8
DS053
WSA 145.3 140.4 69.4 53.9 117.2 112.8 56.5 45 145.3 140.4 69.4 52.8 90.6 90.62 44.9
OPD 150 150 70 50 125 125 70 50 150 150 70 50 110 110 60
FLA 129.2 125.3 59.9 46.4 127.8 123.4 58 46.4 129.2 125.3 59.9 45.7 101.2 101.2 46.4
DS070
WSA 156.9 152 72.9 55.5 138.2 133.8 62.8 50 156.9 152.0 72.9 55.5 111.6 111.6 51.2
OPD 175 175 80 60 175 175 80 60 175 175 80 60 150 150 70
FLA 139.2 134.8 61.4 50 139.2 134.8 61 50 134.9 131 61.4 47.5 112.6 112.6 49.4
DS077
WSA 164 159.2 74.8 57.8 151. 146.6 66.2 54 164.0 159.2 74.8 57.8 124.37 124.4 54.6
OPD 175 175 80 70 175 175 80 70 175 175 80 60 150 150 70
FLA 171.5 167.1 83.7 69.1 171.5 167.1 83.7 69.1 164 163.5 79.8 62.6 144.9 144.9 72.1
WSA 198.8 198.2 97.4 76.4 186.5 182.1 91.6 75.4 198.8 198.2 97.4 76.4 159.9 159.9 80
DS105
OPD 225 225 110 100 225 225 110 100 225 225 110 90 200 200 110
1. Reduced reheat for 028, 035, and 042 models is 10kW.
2. Reduced reheat for 053, 070, and 077 models is 15kW.
3. Consult local representative for SCR reheat values.
4. Reduced reheat for 105 kW models is 20kW.
5. SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.
6. Steam canister humidifiers not available on models with EC fans.
Electric
Standard, kW None
Electric
Standard kW None
16.8 56.3
18.5 64.8
25 70
17.8 63.1
19.7 69
25 80
25.6 78.1
28.4 85.2
35 110
30.4 109.2
33.4 117.2
45 125
34.8 127.8
38.4 138.2
50 175
38.4 139.2
42.4 151
50 175
57.5 171.5
63.8 186.5
80 225
Electric,
Downsized kW
54.1 26.9 24.2 53.5 51.9 25.6 19.9
62.8 31.1 25.9 64.8 62.8 31.1 24.1
70 35 30 70 70 35 25
60.9 29.5 25.2 56.9 55.3 26.9 20.4
67 32.7 27.1 69 67 32.7 24.8
80 40 30 80 80 35 25
75.9 37.7 33 64.8 64.8 31.9 25.6
83 41.2 35.8 78.4 76.4 37.8 29.6
110 50 45 100 100 45 35
104.8 52.4 42 92.1 89.6 44.1 33.5
112.8 56.5 45 110.52 107.4 53.1 40.3
125 70 50 125 125 60 45
123.4 58 46.4 101.4 101.2 46.9 35.7
133.8 62.8 50 122.15 119.02 56.6 43
175 80 60 150 150 70 50
134.8 61 50 112.6 112.6 49.4 38.4
146.6 66.2 54 129.27 126.15 58.5 45.3
175 80 70 150 150 70 50
167.1 83.7 69.1 144.9 144.9 72.1 57.5
182.1 91.6 75.4 169.3 165.5 81.3 63.9
225 110 100 200 200 110 80
Electric,
Downsized kW
®
9Liebert
DS
™
Air-Cooled Systems
Table 5 Electrical data—Air-cooled systems with centrifugal fans
Reheat Options Electric, Std. kW None Electric, Std. kW None
Humidifier
Options
Motor
Model
hp Volts 208 230 460 575 208 230 460 575 208 230 460 575 208 230 460 575
FLA 66.4 63.2 31.8 25.2 55.4 52.5 26.6 23.9 66.4 63.2 31.8 24.7 42.1 41.4 20.8 16.5
028 2.0
WSA 81.1 77.3 38.9 31.5 59.7 56.8 28.8 25.6 81.1 77.3 38.9 30.2 46.4 45.7 23 18.2
OPD80804030707035308080403060603025
FLA 69.5 66.0 33.2 26.4 58.5 55.3 28.0 25.1 69.5 66.0 33.2 25.9 45.2 44.2 22.2 17.7
028 3.0
WSA 84.2 80.1 40.3 33 62.8 59.6 30.2 26.8 84.2 80.1 40.3 31.4 49.5 48.5 24.4 19.4
OPD90804030807035309080403060603025
FLA 72.9 69.4 34.5 26.4 65.3 62.1 30.6 26.1 72.9 69.4 34.5 26.4 52.0 51.0 24.8 18.7
035 3.0t
WSA 88.5 84.4 41.9 33.0 70.5 67.3 33.1 28.0 88.5 84.4 41.9 32.0 57.2 56.2 27.3 20.6
OPD90904535908040359090453570703525
FLA 79.0 75.0 37.3 28.6 71.4 67.7 33.4 28.3 79.0 75.0 37.3 28.6 58.1 56.6 27.6 20.9
035 5.0
WSA 94.6 90.0 44.7 35.8 76.6 72.9 35.9 30.2 94.6 90.0 44.7 34.2 63.3 61.8 30.1 22.8
OPD 100 100 45 35 90 90 45 35 100 100 45 35 80 80 40 30
FLA 86.5 82.7 41.6 36.1 86.4 82.7 41.6 36.1 86.5 82.5 41.4 32.5 73.1 71.6 35.8 28.7
042 5.0
WSA 104 99.3 49.9 39.1 93.5 89.8 45.1 38.9 104.0 99.3 49.9 39.1 80.2 78.7 39.3 31.5
OPD 110 110 50 50 110 110 50 50 110 110 50 45 100 100 50 40
FLA 94.0 89.5 45.0 39.0 93.9 89.5 45.0 39.0 94.0 89.3 44.8 35.4 80.6 78.4 39.2 31.6
042 7.5
WSA 111.5 106.1 53.3 42.0 101.0 96.6 48.5 41.8 111.5 106.1 53.3 42.0 87.7 85.5 42.7 34.4
OPD 125 110 60 50 125 110 60 50 125 110 60 45 110 110 50 45
FLA 112.1 107.2 53.9 41 101.4 96 49.2 39.5 112.1 107.2 53.9 41 74.8 73.8 37.6 27.9
053 3.0
WSA 137.5 131.6 66.2 50.8 109.4 104.0 53.3 42.5 137.5 131.6 66.2 50.3 82.8 81.8 41.7 30.9
OPD 150 125 70 50 125 125 60 50 150 125 70 50 110 110 50 40
FLA 118.2 112.8 56.7 43.2 107.5 101.6 52.0 41.7 118.2 112.8 56.7 43.2 80.9 79.4 40.4 30.1
053 5.0
WSA 143.6 137.2 69.0 53.5 115.5 109.6 56.1 44.7 143.6 137.2 69.0 52.5 88.9 87.4 44.5 33.1
OPD 150 150 70 50 125 125 70 50 150 150 70 50 110 110 60 45
FLA 127.5 122.1 59.5 46.1 126.1 120.2 57.6 46.1 127.5 122.1 59.5 45.4 99.5 98 46 34.5
070 5.0
WSA 155.2 148.8 72.5 55.2 136.5 130.6 62.4 49.7 155.2 148.8 72.5 55.2 109.9 108.4 50.8 38.1
OPD 175 150 80 60 175 150 80 60 175 150 80 60 150 125 70 50
FLA 135.0 128.9 62.9 49.0 133.6 127.0 61.0 49.0 135.0 128.9 62.9 48.3 107.0 104.8 49.4 37.4
070 7.5
WSA 162.7 155.6 75.9 58.1 144.0 137.4 65.8 52.6 162.7 155.6 75.9 58.1 117.4 115.2 54.2 41.0
OPD 175 175 80 60 175 175 80 60 175 175 80 60 150 150 70 50
FLA 145 138.4 64.4 52.6 145.0 138.4 64.0 52.6 140.7 134.6 64.4 50.1 118.4 116.2 52.4 41.0
077 7.5
WSA 169.8 162.8 77.8 60.4 156.8 150.2 69.2 56.6 169.8 162.8 77.8 60.4 130.2 128.0 57.6 45.0
OPD 200 175 90 70 200 175 80 70 175 175 90 70 175 175 70 60
FLA 151.6 144.4 67.4 54.6 151.6 144.4 67.0 54.6 147.3 140.6 67.4 52.1 125.0 122.2 55.4 43.0
077 10.0
WSA 176.4 168.8 80.8 62.4 163.4 156.2 72.2 58.6 176.4 168.8 80.8 62.4 136.8 134.0 60.6 47.0
OPD 200 200 90 70 200 200 90 70 200 175 90 70 175 175 80 60
FLA 177.4 170.2 88.4 72.6 177.4 170.2 88.4 72.6 169.9 166.6 84.5 66.1 150.8 148 76.8 61.0
105 10.0
WSA 204.7 201.3 102.1 79.9 204.7 201.3 102.1 79.9 204.7 201.3 102.1 79.9 165.8 163.0 84.7 67.3
OPD 250 225 125 100 250 225 125 100 225 225 110 90 225 200 110 90
FLA 192.3 184.2 95.4 78.6 192.3 184.2 95.4 78.6 185.3 180.6 91.5 72.1 166.2 162.0 83.8 67.0
105 15.0
WSA 220.1 215.3 109.1 85.9 220.1 215.3 109.1 85.9 220.1 215.3 109.1 85.9 181.2 177.0 91.7 73.3
OPD 250 250 125 100 250 250 125 100 250 250 125 100 225 225 110 90
1. Reduced reheat for 028, 035, and 042 models is 10kW.
2. Reduced reheat for 053, 070, and 077 models is 15kW.
3. Consult local representative for SCR reheat values.
4. Reduced reheat for 105 kW models is 20kW.
5. SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.
Infrared or Steam
Generating Canister
Infrared or Steam
Generating Canister None None
Liebert® DS
™
10
Table 5 Electrical data—Air-cooled systems with centrifugal fans (continued)
Reheat Options Electric, Downsized kW
Humidifier Options Infrared or Steam Generating Canister None
Model Motor, hp Volts 208 230 460 575 208 230 460 575
FLA 55.4 52.5 26.6 23.9 52.6 50.3 25.3 19.6
028 2.0
028 3.0
035 3.0
035 5.0
042 5.0
042 7.5
053 3.0
053 5.0
070 5.0
070 7.5
077 7.5
077 10.0
105 10.0
105 15.0
1. Reduced reheat for 028, 035, and 042 models is 10kW.
2. Reduced reheat for 053, 070, and 077 models is 15kW.
3. Consult local representative for SCR reheat values.
4. Reduced reheat for 105 kW models is 20kW.
5. SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.
WSA 63.9 61.2 30.8 25.6 63.9 61.2 30.8 23.8
OPD 70 70 35 30 70 70 35 25
FLA 58.5 55.3 28 25.1 55.7 53.1 26.7 20.8
WSA 67.0 64.0 32.2 26.8 67.0 64.0 32.2 25.0
OPD 80 70 35 30 70 70 35 25
FLA 65.3 62.1 30.6 26.1 59.1 56.5 28.0 21.3
WSA 71.2 68.2 33.8 28.0 71.2 68.2 33.8 25.7
OPD 90 80 40 35 80 80 40 30
FLA 71.4 67.7 33.4 28.3 65.2 62.1 30.8 23.5
WSA 77.3 73.8 36.6 30.2 77.3 73.8 36.6 27.9
OPD 90 90 45 35 90 80 40 30
FLA 86.4 82.7 41.6 36.1 73.1 71.6 35.8 28.7
WSA 93.5 89.8 45.1 38.9 86.7 83.2 41.7 32.7
OPD 110 110 50 50 100 100 50 40
FLA 93.9 89.5 45.0 39.0 80.6 78.4 39.2 31.6
WSA 101.0 96.6 48.5 41.8 94.2 90.0 45.1 35.6
OPD 125 110 60 50 110 110 50 45
FLA 101.4 96.0 49.2 39.5 84.3 80.8 40.9 31
WSA 109.4 104.0 53.3 42.5 102.7 98.6 49.9 37.8
OPD 125 125 60 50 110 110 60 45
FLA 107.5 101.6 52.0 41.7 90.4 86.4 43.7 33.2
WSA 115.5 109.6 56.1 44.7 108.8 104.2 52.7 40.0
OPD 125 125 70 50 125 125 60 45
FLA 126.1 120.2 57.6 46.1 99.7 98 46.5 35.4
WSA 136.5 130.6 62.4 49.7 120.5 115.8 56.2 42.7
OPD 175 150 80 60 150 125 70 50
FLA 133.6 127.0 61.0 49.0 107.2 104.8 49.9 38.3
WSA 144.0 137.4 65.8 52.6 128.0 122.6 59.6 45.6
OPD 175 175 80 60 150 150 70 50
FLA 145 138.4 64.0 52.6 118.4 116.2 52.4 41.0
WSA 156.8 150.2 69.2 56.6 135.1 129.8 61.5 47.9
OPD 200 175 80 70 175 175 70 60
FLA 151.6 144.4 67.0 54.6 125.0 122.2 55.4 43.0
WSA 163.4 156.2 72.2 58.6 141.7 135.8 64.5 49.9
OPD 200 200 90 70 175 175 80 60
FLA 177.4 170.2 88.4 72.6 150.8 148 76.8 61.0
WSA 192.4 185.2 96.3 78.9 175.2 168.6 86.0 67.4
OPD 250 225 125 100 225 200 110 90
FLA 192.8 184.2 95.4 78.6 166.2 162.0 83.8 67.0
WSA 207.8 199.2 103.3 84.9 190.6 182.6 93.0 73.4
OPD 250 250 125 100 225 225 110 90
Air-Cooled Systems
11 Liebert® DS
™
Air-Cooled Systems
See 3.2 - Standard Electrical Connections, 3.3 Optional Electrical Connections and 3.4 - Optional
Low-Voltage Terminal Package Connections for keys
to numbered components.
Figure 6 Electrical field connections—Upflow and downflow models, single molded case switch
disconnect with main fuses
2
4
Liebert
IntelliSlot
Housing
15
6
60Hz
13
17
5
18
83
88
1
82 89
A
24
23
OVERCURRENT PROTECTION DEVICES
CONTACTORS
CONTACTORS, RELAYS, &
OVERLOAD PROTECTORS
Typical orientation of components shown.
6
Component location varies by option and unit size
9
7576949596 97 91
22
16
92
93
80
19
81
12
11
UPFLOW
B
21
7
8
10
20
A
B
CD
Alternate
Location
P64
P67
E
DOWNFLOW
3
DOWNFLOW LOW-VOLT SECTION
CAUTION
Risk of broken or shorted low-voltage
3
wiring. Field-installed low-voltage wiring
must be routed with loop as shown
to allow electric box to swing.
50
59
84
58 85
37C
38C
37B
38B
37 38 24
51
56
55
7071230
CD
11
SH49-1
49-3
12
Item 12 Installation Conditions
1. Follow all local installation codes.
2. Do not run CAN cables in same conduit, raceway, or
chase as high voltage wires (120-600V).
3. Separate high-voltage wires from CAN wires by 12" (305mm).
4. For runs greater than 350ft (107m), contact Emerson factory.
E
73
72
Point of Hinged Low-Voltage Electric Box
DS UPFLOW LOW VOLT SECTION
DPN000807
Pg. 2, Rev. 8
Liebert® DS
™
12
Air-Cooled Systems
See 3.2 - Standard Electrical Connections, 3.3 Optional Electrical Connections and 3.4 - Optional
Low-Voltage Terminal Package Connections for keys
to numbered components.
Figure 7 Electrical field connections—Upflow and downflow models, dual fused disconnect switches
Liebert
2
14
4
IntelliSlot
Housing
15
15
13
60 Hz
6
1
17 18
82 89
24
PRIMARY
83
A
B
Alternate
Alternate
Location
Location
P64
P67
OVERCURRENT PROTECTION DEVICES
SECONDARY
CONTACTORS
A
CD
CONTACTORS, RELAYS and
OVERLOAD PROTECTORS
E
Typical orientation of components shown.
6
Component location varies by option and unit size
9
22
16
19
DOWNFLOW LOW-VOLTAGE SECTION
UPFLOW
92
88
7576949596 97 91
93
80
81
12
11
3
DOWNFLOW
CAUTION:
Risk of broken or shorted low-voltage
wiring. Field-installed low-voltage wiring
must be routed with loop as shown
to allow electric box to swing.
3
B
23
21
7
8
10
20
50
E
51
56
55
7071230
11
SH49-1
49-3
72
12
37C
37B
59
84
58 85
38C
38B
37 38 24
CD
Item 12 Installation Conditions
1. Follow all local installation codes.
2. Do not run CAN cables in same conduit, raceway or
chase as high-voltage wires (120-600V).
3. Separate high-voltage wires from CAN wires by 12" (305mm).
4. Contact Liebert factory for runs greater than 350ft. (107m).
5. All electrical loads may not be capable of being connected to both
power feeds, with automatic transfer switch.
Consult local representative for dual power configurations available.
73
Point of Hinged Low-Voltage
Electric Box
DS UPFLOW LOW-VOLTAGE SECTION
DPN000807
Pg. 3, Rev. 8
13 Liebert® DS
™
3.2 STANDARD ELECTRICAL CONNECTIONS
Source: DPN000807, Rev. 8
1. Primary high voltage entrance—2.5" (64mm); 1.75" (44mm); 1.375" (35mm) diameter
concentric knockouts located in bottom of box.
2. Secondary high voltage entrance—2.5" (64mm); 1.75" (44mm); 1.375" (35mm) diameter
concentric knockouts located in top of box.
3. Primary low voltage entrance—Quantity (3) 1.375" (35mm) diameter knockouts located in
bottom of unit.
4. Secondary low voltage entrance—Quantity (3) 1. 375" (35mm) diameter knockouts located in
top of box.
5. Three phase electrical service—Terminals are on main fuse block (disregard if unit has
optional disconnect switch). Three-phase service not by Emerson.
6. Earth ground—Terminal for field-supplied earth grounding wire. Earth grounding required for
Liebert units.
7. Remote unit shutdown—Replace existing jumper between Terminals 37 & 38 with
field-supplied normally closed switch having a minimum 75VA, 24VAC rating. Use field-supplied
Class 1 wiring.
8. Customer alarm inputs—Terminals for field-supplied, normally open contacts, having a
minimum 75VA, 24VAC rating, between Terminals 24 & 50, 51, 55 & 56. Use field-supplied
Class 1 wiring. Terminal availability varies by unit options.
9. Common alarm—On any alarm, normally open dry contact is closed across Terminals 75 & 76
for remote indication. 1A, 24VAC maximum load. Use Class 1 field-supplied wiring.
10. Heat rejection interlock—On any call for compressor operation, normally open dry contact is
closed across Terminals 70 & 71 (Circuit 1), 230 (Circuit 2) to heat rejection equipment. 1A,
24VAC maximum load. Use field-supplied Class 1 wiring. When a Liebert DS unit is paired with a
Liebert MC series condenser, remove jumper between Terminal 71 and Terminal 230. Three
wires must connect Terminals 70, 71 and 230 of the indoor unit to Terminals 70, 71 and 230 of the
Liebert MC series condenser.
Air-Cooled Systems
Liebert® DS
™
14
3.3 OPTIONAL ELECTRICAL CONNECTIONS
Source: DPN000807, Rev. 8
11. Unit factory installed disconnect switch, Fuse Block and Main Fuses—Two types of
disconnect switches are available: Non-Locking and Locking. The Non-Locking Type consists of a
non-automatic molded case switch operational from the outside of the unit. Access to the
high-voltage electric panel compartment can be obtained with the switch in either the On or Off
position. The Locking Type is identical except access to the high-voltage electric panel
compartment can be obtained only with the switch in the Off position. Units with fused
disconnects are provided with a defeater button that allows access to the electrical panel when
power is On. The molded case switch disconnect models contain separate main fuses. Units with
fused disconnect have main fuses within the disconnect. Only fused disconnects are used on dual
disconnect options.
12. Secondary disconnect switch and earth ground
13. Three-phase electrical service—Terminals are on top of disconnect switch. Three-phase
service not by Emerson.
14. Smoke sensor alarm—Factory-wired dry contacts from smoke sensor are 91-common, 92-NO,
and 93-NC. Supervised contacts, 80 & 81, open on sensor trouble indication. This smoke sensor is
not intended to function as or replace any room smoke detection system that may be required by
local or national codes. 1A, 24VAC maximum load. Use field-supplied Class 1 wiring.
15. Reheat and humidifier lockout—Remote 24VAC required at Terminals 82 & 83 for lockout of
reheat and humidifier.
16. Condensate alarm (with condensate pump option)—On pump high water indication,
normally open dry contact is closed across Terminals 88 & 89 for remote indication. 1A, 24VAC
maximum load. Use field-supplied Class 1 wiring.
17. Remote humidifier—On any call for humidification, normally open dry contact is closed across
Terminals 11 & 12 to signal field-supplied remote humidifier. 1A, 24VAC maximum load. Use
Class 1 field-supplied wiring.
18. Auxiliary cool contact—On any call for Econ-O-coil operation, normally open dry contact is
closed across Terminals 72 & 73 on dual cool units only. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
Air-Cooled Systems
3.4 OPTIONAL LOW-VOLTAGE TERMINAL PACKAGE CONNECTIONS
Source: DPN000807, Rev. 8
19. Remote unit shutdown—Two additional contact pairs available for unit shutdown (labeled as
37B & 38B, 37C and 38C). Replace jumpers with field-supplied, normally closed switch having a
minimum rating of 75VA, 24VAC. Use field-supplied Class 1 wiring.
20. Common alarm—On any alarm, two additional normally open dry contacts are closed across
Terminals 94 & 95 and 96 & 97 for remote indication. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
21. Main fan auxiliary switch—On closure of main fan contactor, normally open dry contact is
closed across Terminals 84 & 85 for remote indication. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
22. Liebert Liqui-tect
open dry contact is closed across Terminals 58 & 59 for remote indication (Liebert Liqui-tect
sensor ordered separately). 1A, 24VAC maximum load. Use field-supplied Class 1 wiring.
™
shutdown and dry contact—On Liebert Liqui-tect activation, normally
15 Liebert® DS
™
3.5 DIMENSIONS—LIEBERT DS 028-042, DOWNFLOW, AIR-COOLED MODELS
Secondary Refrigerant
Piping Entrance
DPN000796
Rev. 3
Filters are accessible
through top of unit only.
Downflow electrical
connections can be made
from top or bottom of unit.
Shaded area indicates a
recommended minimum
clearance for component
access.
TOP VIEW
Air Inlet Opening
Secondary Entrance
High-Volt Connection(s)
Secondary Entrance
Low-Volt Connections
Minimum required
for filter replacement
73" (1854mm)
72" (1829mm)
76"
(1930mm)
35"
(889mm)
56-7/8"
(1445mm)
Opening
Opening
3/4"
(19mm)
24-3/8"
(619mm)
34" (864mm)
33"
(838mm)
5"
(127mm)
Bezels
FRONT VIEW
2"
(51mm)
The following figures are general illustrations that show the dimensional layout for a Liebert DS unit.
Figure 8 Dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll compressors
with centrifugal fans
Air-Cooled Systems
Table 6 Weights—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll compressors
Dry Weight, Approximate, lb. (kg)
Model Type Model Size: 028-042
Air-Cooled 1470 (668)
Dual-Cool 1620 (736)
Source: DPN000796, Rev. 3
Liebert® DS
™
16
Air-Cooled Systems
Figure 9 Dimensions—downflow, air-cooled, 28-42kW (8-12 ton), front and/or rear discharge models
Minimum required
for filter replacement
Filters are accessible
only through top of unit.
5"
(127mm)
Secondary Refrigerant
Piping Entrance
(1445mm) Opening
56-7/8"
24" (610mm)
Required for Condenser
cleanout on Water/Glycol or
GLYCOOL/Dual Cool
3"
(77mm)
24-3/8"
(619mm)
Opening
3/4"
(19mm)
Bezels
Shaded area indicates a
recommended minimum
clearance for component access.
3"
(76mm)
(483mm)
19"
3-1/4"
(81mm)
33-3/8"
(848mm)
Air Outlet
Opening
REAR VIEW
33"
(838mm)
35"
(889mm)
Secondary Entrance
High-Voltage Connection(s)
76"
(1930mm)
2"
(51mm)
FRONT VIEW
AIR INLET OPENING
TOP VIEW
Secondary Entrance
Low-Voltage Connections
A
33-1/2"
(851mm)
19"
(483mm)
Air Outlet
Opening
3-1/4"
(83mm)
B
Customer Piping and Wiring Connections
1. For primary connection locations see standard submittals DPN000803, DPN000804 or DPN000900.
A floor stand at least 9" high is recommended if primary connections locations are to be used.
2. If no floor stand is used and unit is placed directly on the floor, then do the following:
a) Use secondary connection locations (shown on standard floor planning submittals).
b) Order a condensate pump.
c) Field pipe condensate and humidier line (if ordered) to secondary connection point in
compressor section.
d) Or order additional SFA's to relocate connection locations
34"
(864mm)
310697
Pg. 1, Rev. 0
Dry Weight, lb (kg) Approximate Dimensions, In. (mm)
Compressor Type Model
Semi-Hermetic
Scroll / Digital
Source: 310697, Pg. 1, Rev. 0
028-042 A B
Air-Cooled 1780 (809)
Dual Cool 1930 (877)
Air-Cooled 1470 (668)
Dual Cool 1620 (736)
86 (2184mm) 85 (2159)
73 (1854) 72" (1829)
17 Liebert® DS
™
Air-Cooled Systems
Figure 10 Primary connection locations—downflow, air-cooled, 28-42kW (8-12 ton), scroll or
digital scroll compressors with centrifugal fans
NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).
G1
L1
4" (102mm)
L2
11-3/16"
(284mm)
G2
A
FRONT VIEW
SECTION A-A
BLOWER
R
ECS
HUM
CD
E2
ECR
E1
OUTLET
16-1/16"
(408mm)
B
FRONT OF UNIT
73" (1854mm)
A
All dimensions from
rear corner of unit,
including panels
X
LV1
LV2
LV3
O
Y
35"
(889mm)
DPN000804
Rev. 3
Table 7 Piping data—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll
Point Description
in. (mm)
R Refrigerant Access 59-5/16 (1507) 14-3/4 (375) 11-3/16 x 4 (284 x 102)
L1 Liquid Line System 1 69-15/16 (1776) 16-13/16 (411) 1/2" Cu Sweat
L2 Liquid Line System 2 67-5/8 (1718) 16-13/16 (411) 1/2" Cu Sweat
G1 Hot Gas Discharge 1 65-1/2 (1664) 16-13/16 (411) 5/8" Cu Sweat
G2 Hot Gas Discharge 2 62-7/16 (1586) 16-13/16 (411) 5/8" Cu Sweat
X
CD
Condensate Drain
(infrared humidifier or no humidifier) *
Condensate Drain
(steam generating humidifier) *
46 (1168) 29-1/2 (749) 3/4" FPT
46 (1168) 29-1/2 (749) 1-1/4" FPT
W/ Optional Pump 46 (1168) 29-1/2 (749) 1/2" Cu Sweat
HUM Humidifier Supply Line 53-1/2 (1359) 29 (737) 1/4" Cu Sweat
ECS Econ-O-Coil Supply 54-7/8 (1394) 22-9/16 (573) 1-5/8" Cu Sweat
ECR Econ-O-Coil Return 49-3/8 (1254) 30-3/4 (781) 1-5/8" Cu Sweat
E1 Electrical Conn. (High Volt) 55-1/2 (1410) 31-1/4 (794) 2-1/2"
E2 Electrical Conn. (High Volt) 52-7/16 (1332) 31-1/4 (794) 2-1/2"
LV1 Electrical Conn. (Low Volt) 2-1/4 (57) 27 (686) 7/8"
LV2 Electrical Conn. (Low Volt) 2-1/4 (57) 29 (737) 7/8"
LV3 Electrical Conn. (Low Volt) 2-1/4 (57) 31 (787) 7/8"
B Blower Outlet 21-15/16 (557) 18-1/16 (459) 18-3/4 x 16-1/16 (476 x 408)
* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN000804, Rev. 3
Y
in. (mm)
Connection Size / Opening
in. (mm)
Liebert® DS
™
18
Air-Cooled Systems
59" (1499mm)
DPN000802
Rev. 2
33"
(838mm)
13"
(330mm)
76"
(1930mm)
72" (1829mm)
Assembled Length
76"
(1930mm)
Assembled
Height
60-3/16"
(1529mm)
37"
(940mm)
39"
(991mm)
Compressor Assembly
Filter & Electric
Box Assembly
Blower & Coil
Assembly
NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.
Figure 11 Disassembly dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll
compressors with centrifugal fans
Table 8 Component weights—downflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll
compressors
Dry Weight, Approximate, lb. (kg)
Component
Compressor Assembly 490 (223) 490 (223)
Filter and Electric Box Assembly 210 (96) 210 (96)
Blower and Coil Assembly 770 (350) 920 (418)
Source: DPN000802, Rev. 2
Air-Cooled Dual-Cool
19 Liebert® DS
™
DPN000795
Rev. 4
Filters are accessible
through top of unit only.
Downflow electrical
connections can be made
from top or bottom of unit.
Shaded area indicates a
recommended minimum
clearance for component
access.
TOP VIEW
FRONT VIEW
Air Inlet Opening
Secondary Entrance
High Volt Connection(s)
Secondary Refrigerant
Piping Entrance
Secondary Entrance
Low Volt Connections
Minimum required
for filter replacement
86" (2184mm)
85" (2159mm)2"
(51mm)
76"
(1930mm)
35"
(889mm)
56-7/8"
(1445mm)
Opening
3/4"
(19mm)
Opening
34"
(864mm)
33"
(838mm)
5"
(127mm)
Bezels
24-3/8"
(619mm)
Air-Cooled Systems
Figure 12 Dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors with
centrifugal fans
Table 9 Weights—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors
Dry Weight, Approximate, lb. (kg)
Model Type Model Size: 028-042
Air-Cooled 1780 (809)
Dual-Cool 1930 (877)
Source: DPN000795, Rev. 4
Liebert® DS
™
20
Air-Cooled Systems
L1
L2
G1
G2
R
E1
E2
HUM
B
O
X
Y
A
A
ECS
ECR
CD
FRONT VIEW
LV1
NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).
4" (102mm)
BLOWER
OUTLET
All dimensions from
rear corner of unit
including panels
16-1/16"
(408mm)
35"
(889mm)
LV2
LV3
SECTION A-A
FRONT OF UNIT
16-7/16"
(418mm)
86"
(2184mm)
DPN000803
Rev. 4
Figure 13 Primary connection locations—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic
compressors with centrifugal fans
Table 10 Piping data—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors
Point Description
R Refrigerant Access 63 (1600) 13-13/16 (351) 16-7/16 x 4 (418 x 102)
L1 Liquid Line System 1 79-3/16 (2011) 16-3/4 (425) 1/2" Cu Sweat
L2 Liquid Line System 2 76-1/2 (1943) 16-3/4 (425) 1/2" Cu Sweat
G1 Hot Gas Discharge 1 73-7/8 (1876) 16-3/4 (425) 5/8" Cu Sweat
G2 Hot Gas Discharge 2 70-1/8 (1780) 16-3/4 (425) 5/8" Cu Sweat
CD
HUM Humidifier Supply Line 53-1/2 (1359) 29 (737) 1/4" Cu Sweat
ECS Econ-O-Coil Supply 54-7/8 (1394) 22-9/16 (573) 1-5/8" Cu Sweat
ECR Econ-O-Coil Return 49-3/8 (1254) 30-3/4 (781) 1-5/8" Cu Sweat
E1 Electrical Conn. (High Volt) 55-1/2 (1410) 31-1/4 (794) 2-1/2"
E2 Electrical Conn. (High Volt) 52-7/16 (1332) 31-1/4 (794) 2-1/2"
LV1 Electrical Conn. (Low Volt) 2-1/4 (57) 27 (686) 7/8"
LV2 Electrical Conn. (Low Volt) 2-1/4 (57) 29 (737) 7/8"
LV3 Electrical Conn. (Low Volt) 2-1/4 (57) 31 (787) 7/8"
B Blower Outlet 21-15/16 (558) 18-1/16 (459) 18-3/4 x 16-1/16 (476 x 408)
* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN000803, Rev. 4
Condensate Drain
(infrared humidifier or no humidifier)*
Condensate Drain
(steam generating humidifier)*
W/ Optional Pump 46 (1168) 29-1/2 (749) 1/2" Cu Sweat
X
in. (mm)
Y
in. (mm)
Connection Size / Opening
in. (mm)
46 (1168) 29-1/2 (749) 3/4" FPT
46 (1168) 29-1/2 (749) 1-1/4" FPT
21 Liebert® DS
™
Air-Cooled Systems
39"
991mm
59" (1499mm)
DPN000801
Rev. 2
33"
(838mm)
76"
(1930mm)
26"
(660mm)
85" (2159mm)
Assembled Length
76"
(1930mm)
Assembled
Height
60-3/16"
(1529mm)
37"
(940mm)
39"
(991mm)
Compressor Assembly
Filter & Electric
Box Assembly
Blower & Coil
Assembly
NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.
Figure 14 Disassembly dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic
compressors with centrifugal fans
Table 11 Component weights—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors
Dry Weight, Approximate, Including Panels, lb (kg)
Component
Compressor Assembly 800 (364) 800 (364)
Filter and Electric Box Assembly 210 (96) 210 (96)
Blower and Coil Assembly 770 (350) 920 (418)
Source: DPN000801, Rev. 2
Air-Cooled Dual-Cooled
Liebert® DS
™
22
Air-Cooled Systems
33"
(838mm)
35"
(889mm)
A
76"
(1930mm)
2"
(51mm)
B
34"
(864mm)
Shaded area indicates a
recommended minimum
clearance for component access.
5"
(127mm)
3/4"
(19mm)
Bezels
24-5/8"
(619mm)
Opening
80"
(2032mm)
Second Refrigerant
Piping Entrance
AIR INLET OPENING
Opening
Secondary Entrance
Low-Volt Connections
Minimum required
for filter replacement
Secondary Entrance
High-Volt Connection(s)
TOP VIEW
FRONT VIEW
Notes: Filters are accessible
through top of unit only.
Downflow electrical
connections can be made
from top or bottom of unit.
DPN000925
Rev. 2
Digital scroll compressors
not available on DS 077.
3.6 DIMENSIONS—LIEBERT DS 053-077, DOWNFLOW, AIR-COOLED MODELS
Figure 15 Dimensions—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressors
with centrifugal fans
Table 12 Weights—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressors
Model No. DS 053 DS 070 DS 077 *
Air Cooled 1920 (871) 1970 (894) 2020 (916)
Dual Cool 2100 (953) 2150 (975) 2200 (998)
Air Cooled “A” 98 (2489) 98 (2489) 98 (2489)
Air Cooled “B” 97 (2464) 97 (2464) 97 (2464)
* Digital scroll compressors not available on DS 077
Source: DPN000925, Rev. 2
Dry Weight, lb (kg) Approximate
Dimensions, in (mm)
23 Liebert® DS
™
Air-Cooled Systems
A
A
L1
L2
G1
G2
R
ECS
ECR
E1
E2
HUM
CD
B1
O
X
Y
B2
FRONT VIEW
LV1
NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).
4"
(102mm)
BLOWER
OUTLET
All dimensions from
rear corner of unit
including panels
16-1/16"
(408mm)
35"
(889mm)
LV2
LV3
SECTION A-A
FRONT OF UNIT
12-3/16"
(310mm)
98" (2489mm)
BLOWER
OUTLET
DPN000929
Rev. 4
Digital scroll compressors
not available on DS 077.
Figure 16 Primary connection locations—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital
scroll compressors with centrifugal fans
Table 13 Piping data—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressors ***
Point Description
R Refrigerant Access 81-3/4 (2076) 14-3/4 (374) 12-3/16 x 4 (310 x 102)
L1 Liquid Line System 1 94-11/16 (2405) 16-3/4 (425) 1/2" / 5/8" Cu Sweat
L2 Liquid Line System 2 91-7/8 (2334) 16-3/4 (425) 1/2" / 5/8" Cu Sweat
G1 Hot Gas Discharge 1 88-3/4 (2254) 16-3/8 (416) 7/8" / 1-1/8" Cu Sweat
G2 Hot Gas Discharge 2 85-9/16 (2173) 16-3/8 (416) 7/8" / 1-1/8" Cu Sweat
CD
HUM Humidifier Supply Line 76-1/2 (1943) 29 (736) 1/4" Cu Sweat
ECS** Econ-O-Coil Supply 78-5/8 (1997) 22-1/4 (565) 2-1/8" Cu Sweat
ECR** Econ-O-Coil Return 72 (1829) 29 (737) 2-1/8" Cu Sweat
E1 Electrical Conn. (High Volt) 78-1/2 (1994) 31-1/8 (790) 2-1/2"
E2 Electrical Conn. (High Volt) 75-3/8 (1915) 31-1/8 (790) 2-1/2"
LV1 Electrical Conn. (Low Volt) 1-7/8 (48) 28-1/2 (724) 7/8"
LV2 Electrical Conn. (Low Volt) 1-7/8 (48) 30-1/4 (768) 7/8"
LV3 Electrical Conn. (Low Volt) 1-7/8 (48) 32 (813) 7/8"
B1
B2
* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
** Supplied on Dual-Cooling systems only (four-pipe system)
*** Digital scroll compressors not available on DS 077.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN000929, Rev 4
Liebert® DS
X
in. (mm)
Y
in. (mm)
Connection Size / Opening
in. (mm)
53kW (15 ton) / 70& 77kW (20 & 22 ton)
Condensate Drain
(infrared humidifier or no humidifier)*
Condensate Drain
(steam generating humidifier)*
67-11/16 (1719) 30-1/2 (775) 3/4" FPT
67-11/16 (1719) 30-1/2 (775) 1-1/4" FPT
W/ Optional Pump 67-11/16 (1719) 30-1/2 (775) 1/2" Cu Sweat
Blower Outlet (15 x 15) 23-1/8 (587) 18-1/16 (459) 18-3/4 x 16-1/16 (476 x 408)
Blower Outlet (15 x 11) 27-3/4 (705) 18-1/16 (459) 14-3/4 x 16-1/16 (375 x 408)
Blower Outlet (15 x 15) 50-3/8 (1280) 18-1/16 (459) 18-3/4 x 16-1/16 (476 x 408)
Blower Outlet (15 x 11) 54-3/8 (1381) 18-1/16 (459) 14-3/4 x 16-1/16 (375 x 408)
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
™
24
Air-Cooled Systems
Figure 17 Dimensions—downflow, air-cooled, 53-77kW (15-22 ton), front and/or rear discharge models
with EC fans
Required for Condenser
cleanout on Water/Glycol or
Customer Piping and Wiring Connections
1. For primary connection locations see standard submittals DPN000928,
DPN000929 or DPN000933.
A floor stand at least 9" high is recommended if primary connections locations are to be used.
2. If no floor stand is used and unit is placed directly on the floor, then do the following:
a) Use secondary connection locations (shown on standard floor planning submittals).
b) Order a condensate pump.
c) Field pipe condensate and humidier line (if ordered) to secondary connection point in
compressor section.
d) Or order additional SFA's to relocate connection locations
Secondary Refrigerant
Piping Entrance
80" (2032mm)
Opening
24" (610mm)
GLYCOOL/Dual Cool
Minimum required
for filter replacement
Filters are accessible
only through top of unit.
5"
(127mm)
35"
(889mm)
33"
(838mm)
Secondary Entrance
High-Voltage Connection(s)
AIR INLET OPENING
TOP VIEW
A
76"
(1930mm)
15-1/8"
(384mm)
29-1/4"
(743mm)
Air Outlet
Opening
2"
(51mm)
FRONT VIEW
B
Dry Weight, lb (kg) Approximate Dimensions, in. (mm)
Compressor Type
Semi-Hermetic
Scroll / Digital
* Digital scroll compressors not available on 077 models
Source: 310697, Pg. 2, Rev. 0
Model 53 70 77 * A B
Air-Cooled 2350 (1069) 2400 (1091) 2450 (1114)
Dual Cool 2530 (1150 2580 (1173) 2630 (1196)
Air-Cooled 1920 (873) 1970 (896) 2020 (919)
Dual Cool 2100 (955) 2150 (978) 2200 (1000)
15-1/8"
(384mm)
29-5/8"
(752mm)
3-1/4"
(83mm)
25-5/8"
(619mm)
Opening
3/4"
Secondary Entrance
Low-Voltage Connections
Air Outlet
Opening
(19mm)
3-1/8"
(79mm)
Shaded area indicates a
recommended minimum
clearance for component access.
15-1/8"
(384mm)
29-5/8"
(752mm)
3-1/4"
(83mm)
Air Outlet
Opening
15-1/8"
(384mm)
29-1/4"
(743mm)
Air Outlet
Opening
REAR VIEW
109 (2769) 108 (2743)
34"
(864mm)
310697
Pg. 2, Rev. 0
98 (2489) 97 (2464)
25 Liebert® DS
™
Air-Cooled Systems
12-3/16"
(310mm)
FRONT OF UNIT
FRONT VIEW
DPN002182
Rev. 1
SECTION A-A
NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).
ECS
ECR
E1
E2
CD
R
LV1
LV2
LV3
X
AA
Y
O
All dimensions from
rear corner of unit
including panels
35"
(889mm)
BLOWER
OUTLET
HUM
L1 L2 G1
G2
B1
4" (102mm)
98" (2489mm)
Digital scroll compressors not
available on 077 models.
Figure 18 Primary connection locations—downflow air-cooled 53-77kW (15-22 ton), scroll or digital
scroll compressors with EC fans, front, rear or bottom discharge
Table 14 Piping details—downflow air-cooled 53-77kW (15-22 ton) with EC fans, scroll or digital scroll
Point Description
R Refrigerant Access 81-3/4 (2076) 14-3/4 (374) 12-3/16x4 (310x102)
L1 Liquid Line System 1 94-11/16 (2405) 16-3/4 (425) 1/2 / 5/8 Cu Sweat
L2 Liquid Line System 2 91-7/8 (2334) 16-3/4 (425) 1/2 / 5/8 Cu Sweat
G1 Hot Gas Discharge 1 88-3/4 (2254) 16-3/8 (416) 7/8 / 1-1/8 Cu Sweat
G2 Hot Gas Discharge 2 85-9/16 (2173) 16-3/8 (416) 7/8 / 1-1/8 Cu Sweat
CD
HUM Humidifier Supply Line 76-1/2 (1943) 29 (736) 1/4 Cu Sweat
ECS** Econ-O-Coil Supply (DS Only) 78-5/8 (1997) 22-1/4 (565) 2-1/8 Cu Sweat
ECR** Econ-O-Coil Return (DS Only) 73-15/16 (1862) 26-9/16 (675) 2-1/8 Cu Sweat
E1 Electrical Conn. (High Volt) 78-1/2 (1994) 31-1/8 (790) 2-1/2
E2 Electrical Conn. (High Volt) 75-3/8 (1915) 31-1/8 (790) 2-1/2
LV1 Electrical Conn. (Low Volt) 2 (51) 29 (737) 7/8
LV2 Electrical Conn. (Low Volt) 2 (51) 30-7/8 (784) 7/8
LV3 Electrical Conn. (Low Volt) 2 (51) 32 (813) 7/8
B1 Blower Outlet 4-1/2 (114) 33 (838) 58-3/8x30 (1483x762)
* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
*** Digital scroll compressors not available on DS 077
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN002182, Rev. 1
Liebert® DS
compressors ***
Condensate Drain
(Infrared Humidifier or No Humidifier)*
W/ Optional Pump 68-3/8 (1737) 31-3/8 (797) 1/2 Cu Sweat
™
X
in. (mm)
Y
in. (mm)
Connection Size / Opening
53kW (15 ton)/ 70 & 77kW (20 & 22 ton)
68-3/8 (1737) 31-3/8 (797) 3/4 FPT
26
in. (mm)
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