MS SeriesUNIT COOLERS
Technical Bulletin
Products that provide lasting solutions.
MS SERIES UNIT COOLERS 1Specifications subject to change without notice.
Medium Profile Units for Medium Size Walk-In Coolers and Freezers
The MS Series Unit Coolers have a medium profile to accommodate increased air flow formedium refrigeration applications. A galvanized steel cabinet provides long lasting durabilityand strength under most conditions. The MS Series is built for performance with increasedBTUH capacities and heavy-duty construction for your every refrigeration need.
n Medium profile, galvanized steel cabinet.n 20" 1 to 4 fans.n 15,000 to113,170 BTUH @10°TD.n 4, 6, or 7 fins per inch air defrost.n 4, 5, or 6 fins per inch electric (EL) or hot gas (HG) defrost.n 1/2 h.p. ball-bearing motors totally enclosed, internal overload protection with automatic reset,permanently lubricated.
n 230V, 1 or 3, 460V-3, 575V-3 electric defrost models.n 115V, 230V, 1 or 3, 460V-3, 575V-3 air and gas defrost models.n Fan delay and defrost termination thermostat.n Terminal block.n Heater safety thermostat on electric defrost.
Optional Features and Accessories
n Long throw adapters (stainless steel or galvanized) .*n Insulated drain pans.n 230/1 or 460/1 electric defrost pan heaters.n Additional 2% for 575volt room thermostat.*n Mounted thermostatic expansion valve.n Liquid line solenoid valve.*n Suction/liquid heat exchanger.*n Stucco aluminum or stainless steel housing.n Painted housing.n Stainless steel housing.
* Shipped loose.
MS Series Unit Coolers
Hinged Drain PanHinged drain pan easily drops down
for quick service.
Access PanelHinged panel cover provides easy access to electrical connections.
n Stainless steel drain pan.n Glycol circuiting.n Heat reclaim circuiting.n Copper fins.n Coated coils – epoxy or phenolic.n Export crating.n Mounted NEMA 4x non-fused disconnect.n Adj. defrost termination control.n Face split coil.
Krack_MS_Text_082012_2009 8/21/12 6:25 PM Page 1
Heater Voltage
A = 208-230/1/60H = 460/1/60K = 208-230/3/60M = 460/3/60P = 575/3/60
Unit Type
MS = Super Cooler
Fin Spacing
4 FPI 6 FPI5 FPI 7 FPI
Number of Fans
Type of Defrost
A = Air DefrostB = BrineD = Electric with No Pan HeatE = Electric with Electric PanG = 3 Pipe Hot Gas with Hot Gas Drain PanH = 3 Pipe Hot Gas with Electric Drain PanK = 2 Pipe Kool Gas with Kool Gas Drain PanP = 2 Pipe Kool Gas with Electric Drain PanR = Heat Reclaim
Motor Type
A = Shaded Pole Motors B = PSC Motors C = 3 Phase Motors
BTU/h in Hundreds (00)
Motor Voltage
A = 208-230/1/60B = 115/1/60H = 460/1/60K = 208-230/3/60M = 460/3/60P = 575/3/60U = 380/3/50 (not UL)
MS 2 6 A - 367 - C K K
UL ULC
MS Series Unit Coolers
Ordering Information
2 MS SERIES UNIT COOLERSSpecifications subject to change without notice.
Specify When Ordering All Models
n Complete model number. n Liquid refrigerant temperature.n Refrigerant R22, R404A, or R507. n Motor and heater voltage. n Room temperature. n Optional features. n Saturated suction temperature. n Optional accessories.
Model Key
Krack_MS_Text_082012_2009 8/21/12 6:25 PM Page 2
MS Series Unit Coolers
MS SERIES UNIT COOLERS 3Specifications subject to change without notice.
Air Defrost Medium Profile
MEDIUM TEMPERATURE
MODELMS14A-150MS14A-190MS14A-225MS14A-249MS16A-184MS16A-229MS16A-260MS16A-281MS17A-199MS17A-246MS17A-275MS17A-295MS24A-300MS24A-381MS24A-450MS24A-498MS26A-367MS26A-459MS26A-520MS26A-562MS27A-398MS27A-492MS27A-550MS27A-591MS34A-524MS34A-623MS34A-708MS36A-626MS36A-712MS36A-806MS37A-663MS37A-755MS37A-849MS44A-699MS44A-830MS44A-944MS46A-835MS46A-949
MS46A-1075MS47A-885
MS47A-1007MS47A-1132
SHIPPINGWGT.(LBS)142153171184151164182197161174194209247272301326269297328355309342370419369402433402438472419456492493528578538576630560600656
CAP. (BTUH)@ 10° TD +20 SST
15,02019,03022,47024,91018,36022,94026,01028,10019,88024,59027,50029,54030,04038,05044,95049,82036,71045,88052,03056,19039,76049,18055,00059,08052,40062,25070,82062,61071,18080,62066,34075,54084,87069,87083,00094,43083,48094,900
107,49088,450
100,720113,170
AIRFLOW(CFM)4,2004,1204,0003,9204,1204,0403,9403,8504,0804,0003,9003,8008,4008,2408,0007,8408,2408,0807,8807,7008,1608,0007,8007,600
12,13511,50511,32511,89511,04010,99511,70010,99510,90516,18015,34015,10015,86014,72014,66015,60014,66014,540
L57.00057.00057.00057.00057.00057.00057.00057.00057.00057.00057.00057.000
102.000102.000102.000102.000102.000102.000102.000102.000102.000102.000102.000102.000129.000129.000129.000129.000129.000129.000129.000129.000129.000168.000168.000168.000168.000168.000168.000168.000168.000168.000
H 26.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.25026.250
W26.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.625
DIMENSIONS (IN)NO. OFHANGERS
444444444444666666666666888888888101010101010101010
REFRIGCHARGE
578105781057810101315181013151810131518162023162026162023212631212631212631
LIQUID5/85/85/87/85/85/85/87/85/85/85/87/87/87/87/87/87/87/87/87/87/87/87/87/87/87/8
1-3/87/87/8
1-3/87/87/8
1-3/81-3/81-3/81-3/81-3/81-3/81-3/81-3/81-3/81-3/8
SUCTION1-1/81-1/81-1/81-1/81-1/81-1/81-1/81-1/81-1/81-1/81-1/81-1/81-3/81-3/81-3/81-3/81-3/81-3/81-3/81-3/81-3/81-3/81-3/81-3/81-5/81-5/81-5/81-5/81-5/81-5/81-5/81-5/81-5/82-1/82-1/82-1/82-1/82-1/82-1/82-1/82-1/82-1/8
REFRIGERATION CONNECTIONS
Krack_MS_Text_082012_2009 8/21/12 6:25 PM Page 3
MS Series Unit Coolers
Electric Defrost Medium Profile
4 MS SERIES UNIT COOLERSSpecifications subject to change without notice.
LOW TEMPERATURE
SHIPPINGWGT. (LBS)174208186221198236297357317381337406398470425502452534541616578658615700
MODELMS14E-162MS14E-212MS15E-178MS15E-223MS16E-195MS16E-239MS24E-323MS24E-424MS25E-356MS25E-444MS26E-390MS26E-478MS34E-445MS34E-602MS35E-502MS35E-643MS36E-532MS36E-685MS44E-594MS44E-803MS45E-669MS45E-858MS46E-710MS46E-914
-20 SST 16,18021,17017,79022,26019,50023,89032,34042,35035,58044,45039,00047,76044,54060,20050,18064,33053,22068,53059,39080,27066,90085,77070,96091,370
+20 SST19,03024,91020,93026,19022,94028,10038,05049,82041,86052,29045,88056,19052,40070,82059,03075,68062,61080,62069,87094,43078,710
100,91083,480
107,490
AIRFLOW (CFM)4,1203,9204,0603,8904,0403,8508,2407,8408,1207,7808,0807,70012,13511,32512,01511,20511,89510,99516,18015,10016,02014,94015,86014,660
L57.0057.0057.0057.0057.0057.00
102.00102.00102.00102.00102.00102.00129.00129.00129.00129.00129.00129.00168.00168.00168.00168.00168.00168.00
W 26.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.625
H26.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.25
CAP. (BTUH) @ 10˚ TD DIMENSIONS (IN)REFRIGERATION CONNECTIONS
NO. OFHANGERS
444444666666888888101010101010
REFRIGCHARGE
710710710131813181318162316231623213121312131
LIQUID5/87/85/87/85/87/87/87/87/87/87/87/87/8
1-3/87/8
1-3/87/8
1-3/81-3/81-3/81-3/81-3/81-3/81-3/8
SUCTION1-1/81-1/81-1/81-1/81-1/81-1/81-3/81-3/81-3/81-3/81-3/81-3/81-5/81-5/81-5/81-5/81-5/81-5/82-1/82-1/82-1/82-1/82-1/82-1/8
NOTE: Ratings apply for D or E electric defrost.
Krack_MS_Text_082012_2009 8/21/12 6:25 PM Page 4
MS Series Unit Coolers
MS SERIES UNIT COOLERS 5Specifications subject to change without notice.
Hot Gas Defrost Medium Profile
LOW TEMPERATURE
SHIPPINGWGT. (LBS)174208186221198236297357317381337406398470425502452534541616578658615700
AIRFLOW (CFM)4,1203,9204,0603,8904,0403,8508,2407,8408,1207,7808,0807,70012,13511,32512,01511,20511,89510,99516,18015,10016,02014,94015,86014,660
MODELMS14( )-162MS14( )-212MS15( )-178MS15( )-223MS16( )-195MS16( )-239MS24( )-323MS24( )-424MS25( )-356MS25( )-444MS26( )-390MS26( )-478MS34( )-445MS34( )-602MS35( )-502MS35( )-643MS36( )-532MS36( )-685MS44( )-594MS44( )-803MS45( )-669MS45( )-858MS46( )-710MS46( )-914
-20 SST 16,18021,17017,79022,26019,50023,89032,34042,35035,58044,45039,00047,76044,54060,20050,18064,33053,22068,53059,39080,27066,90085,77070,96091,370
+20 SST19,03024,91020,93026,19022,94028,10038,05049,82041,86052,29045,88056,19052,40070,82059,03075,68062,61080,62069,87094,43078,710
100,91083,480
107,490
L57.0057.0057.0057.0057.0057.00
102.00102.00102.00102.00102.00102.00129.00129.00129.00129.00129.00129.00168.00168.00168.00168.00168.00168.00
W 26.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.62526.625
H26.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.2526.25
CAP. (BTUH) @ 10˚ TD DIMENSIONS (IN)REFRIGERATION CONNECTIONS
NO. OFHANGERS
444444666666888888101010101010
REFRIGCHARGE
710710710131813181318162316231623213121312131
LIQUID5/87/85/87/85/87/87/87/87/87/87/87/87/8
1-3/87/8
1-3/87/8
1-3/81-3/81-3/81-3/81-3/81-3/81-3/8
SUCTION1-2/81-1/81-1/81-1/81-1/81-1/81-3/81-3/81-3/81-3/81-3/81-3/81-5/81-5/81-5/81-5/81-5/81-5/82-1/82-1/82-1/82-1/82-1/82-1/8
HG1/21/21/21/21/21/21/27/81/27/81/27/87/87/87/87/87/87/87/87/87/87/87/87/8
Krack_MS_Text_082012_2009 8/21/12 6:25 PM Page 5
MS Series Unit Coolers
Electric Defrost (D) Heater Data
Electric Defrost with Electric Drain Pan (E) Data
6 MS SERIES UNIT COOLERSSpecifications subject to change without notice.
LOW TEMPERATURE
MODEL
1 FAN – 162,178, 195
1 FAN – 212, 223, 239
2 FAN – 323, 356, 390
2 FAN – 424, 444
3 FAN – 445, 502, 532
3 FAN – 602, 643, 685
4 FAN – 594, 669, 710
4 FAN – 803, 858, 914
AMPS
9.91
12.68
20.28
25.35
25.81
32.26
35.02
43.78*
KW
4.04
5.05
8.08
10.10
10.28
12.85
13.95
17.44*
AMPS
5.07
6.34
10.14
12.68
12.90
16.13
17.51
21.89
KW
4.04
5.05
8.08
10.10
10.28
12.85
13.95
17.44
AMPS
4.42
5.52
8.84
11.05
11.25
14.06
15.26
19.08
KW
4.40
5.50
8.80
11.10
11.20
14.00
15.20
19.00
230/3/60 460/3/60 575/3/60
*Two circuits. Amount shown in chart is total kW and Amps. NOTE: Information required for complete product Model Key – Motor Type, Voltage Code, Heater Voltage Code. Refer to Model Key on page 2.
LOW TEMPERATURE
MODEL
1 FAN – 162,178, 195
1 FAN – 212, 223, 239
2 FAN – 323, 356, 390
2 FAN – 424, 444
3 FAN – 445, 502, 532
3 FAN – 602, 643, 685
4 FAN – 594, 669, 710
4 FAN – 803, 858, 914
AMPS
12.68
15.21
25.35
30.42
32.26
38.71
43.78
52.54*
KW
5.05
6.60
10.10
12.12
12.85
15.42
17.44
20.92*
AMPS
6.34
7.61
12.68
15.21
16.13
19.34
21.89
26.21
KW
5.05
6.60
10.10
12.12
12.85
15.42
17.44
20.90
AMPS
5.52
6.63
11.05
13.35
14.08
16.87
17.51
21.01
KW
5.50
6.60
11.00
13.20
14.00
16.80
19.00
22.80
230/3/60 460/3/60 575/3/60
*Two circuits with 10.46kW and 26.26 Amps each. Amount shown in chart is total kW and Amps. NOTE: Information required for complete product Model Key – Motor Type, Voltage Code, Heater Voltage Code. Refer to Model Key on page 2.
Krack_MS_Text_082012_2009 8/21/12 6:25 PM Page 6
MS Series Unit Coolers
MS SERIES UNIT COOLERS 7Specifications subject to change without notice.
Hot Gas Defrost Drain Pan (H,P) Data
LOW TEMPERATURE
MODEL
1 FAN – 162,178, 195, 212, 223, 239
2 FAN – 323, 356, 390, 424, 444
3 FAN – 445, 502, 532, 602, 643, 685
4 FAN – 594, 669, 710, 803, 858, 914
AMPS
4.39
8.78
11.73
15.16
KW
1.01
2.02
2.57
3.49
AMPS
2.19
4.39
5.58
7.58
KW
1.01
2.02
2.57
3.48
AMPS
1.91
3.82
4.86
6.60
KW
1.10
2.20
2.80
3.80
230/3/60 460/3/60 575/3/60
Amount shown in chart is total kW and Amps.NOTE: Information required for complete product Model Key – Motor Type, Voltage Code, Heater Voltage Code.
Refer to Model Key on page 2.
Replacement Parts
DESCRIPTION
MOTOR 115-230/1/60
MOTOR 208-230/460/3/60
MOTOR 575/3/60
MOTOR MOUNT RING (1 Phase)
MOTOR MOUNT RING (3 Phase)
PART #
4410161
4410170
4410173
4914983
4910148
DESCRIPTION
FAN BLADE
FAN GUARD
LONG THROW ADAPTER
PART #
4780659
4914788
4916470
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MS Series Unit Coolers
Dimensional Data
8 MS SERIES UNIT COOLERSSpecifications subject to change without notice.
Note: Dimensions in inches.
Note: Allow 15” clearance between rear of coil and wall for maximum efficiency and minimum noise level.12” left side clearance allows for optimum access to electrical connections.
SIZE A B C D
1 FAN 45.00 45.00 57.00 15.322 FAN 45.00 90.00 102.00 15.323 FAN 39.00 117.00 129.00 15.324 FAN 39.00 156.00 168.00 15.32
UNIT DIMENSIONS
Krack_MS_Text_082012_2009 8/21/12 6:25 PM Page 8
MS Series Unit Coolers
MS SERIES UNIT COOLERS 9Specifications subject to change without notice.
Wiring Diagram
1 FAN
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MS Series Unit Coolers
Wiring Diagram
10 MS SERIES UNIT COOLERSSpecifications subject to change without notice.
2 FAN
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MS Series Unit Coolers
MS SERIES UNIT COOLERS 11Specifications subject to change without notice.
Wiring Diagram
3 FAN
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MS Series Unit Coolers
Wiring Diagram
12 MS SERIES UNIT COOLERSSpecifications subject to change without notice.
4 FAN
Krack_MS_Text_082012_2009 8/21/12 6:25 PM Page 12
Krack Corporation 1300 North Arlington Heights Rd., Suite 130Itasca, IL 60143Ph: 630.629.7500
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