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JUH Heat Reclaim
Unit Heaters
For Refrigeration Systems
Bulletin K90-JUH-PDI-10
1064634
We are on the Internet
www.keepriterefrigeration.com
Electrical Power: 115/1/60, 208-230/1/60,
208-230/3/60, 460/3/60,
575/3/60
CONTENTS PAGE
Nomenclature.........................................
Features..................................................
System Design.......................................
Circuit Arrangement..............................
Specifications.........................................
Dimensional Data...................................
Cover
2
2
3
3
Back
• Designed for Supermarkets, Convenience
Stores, Restaurants, Refrigerated warehouses,
arenas/curling rinks and institutions.
• Reclaims waste heat for use in shipping/
receiving areas, storage, preparation and work
areas.
• Heavy gauge all aluminum cabinet with plated
and non-ferrous corrosion resistant fasteners
throughout.
• Cleanable, durable textured aluminum
cabinet.
• Thermally protected and permanently
lubricated fan motor for long life and
dependability .
• Compact size maximizes usable storage
space.
• Stainless steel and nylon hardware
eliminates rusting and stripping of fasteners.
• Corrosion resistant white polycarbonate fan
guard.
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JUH HEAT RECLAIM UNIT HEATERS
FEATURES
CABINET - Heavy gauge all aluminum construction for long
life and minimum weight. Plated and non-ferrous corrosion
resistant fasteners used throughout. Electrical connection
box and all refrigerant connections on outside of cabinet.
COIL - Heat reclaim coil fabricated from 5/8” (16mm) O.D.
copper tube mechanically expanded to provide a secure bond
with rippled aluminum plate fins for optimum heat transfer.
Coil circuited for minimum pressure drop and drainability to
prevent logging of oil and liquid refrigerant. Coil assembly
leak tested at 300 psig. dehydrated and sealed.
NUMBER OF COIL CIRCUITS - Standard models are supplied
with two equal circuits. Other arrangements of two or three
circuits are available.
FANS - Aluminum fans. Die formed venturi fan discharge
provides quiet, efficient operation with maximum air throw.
MOTORS - Permanently lubricated. totally enclosed motors
feature thermal protection and current overload sensors for
maximum life and dependability. Direct drive arrangement
eases service and allows operation of the unit in case of
partial motor failure. Available for 575/3/60, 460/3/60,
208/3/60, 208-230/1/60 or 115/1/60 entering electrical service.
FAN GUARD/MOTOR MOUNTS - Heavy gauge steel wire fan
guard/motor mounts are zinc plated for corrosion protection.
WIRING - Moisture and fungus resistant wiring harness. All
electrical connections at one location.
INSTALLATION FEATURES - “Z” bar mounting brackets with
mounting holes on 8” (203mm) centers allows installation
to varied joist centers or ceilling panel lengths. External
electrical connection box and refrigeration connections
simplify installation.
EXTERNAL ALL COPPER
REFRIGERANT
CONNECTIONS
FREE DRAINING COIL,
CIRCUITED FOR
MINIMUM
PRESSURE DROP
HIGH EFFICIENCY
COPPER TUBE,
ALUMINUM FIN
HEAT RECLAIM COIL
SYSTEM DESIGN
JUH Heat reclaim units may be used in series or parallel with
an outside condenser.
Parallel piping is used when the heat reclaim system is to
recover 100% of the system total heat of rejection. A three-way
valve in the discharge line directs the refrigerant flow either to
the outside condenser or to the heat reclaim unit. See Fig. 1
Figure 1 - JUH Heat Reclaim Unit piping arrangement when
total heat of rejection does not exceed capacity of heat
reclaim unit.
EXTERNAL ELECTRICAL CONNECTION BOX
HEAVY DUTY, CORROSION RESISTANT FAN GUARDS
“Z” BAR MOUNTING BRACKETS
DIRECT DRIVE
1100 RPM FAN MOTORS
HEAVY GAUGE, TEXTURED
ALUMINUM CABINET
ASSEMBLED WITH
CORROSION RESISTANT
FASTENERS
Series piping is used when the amount of heat to be
recovered is less than the total heat of rejection. A three-way
valve controls refrigerant flow. A by-pass arrangement with a
balancing globe valve, is used to prevent excressive
refrigerant pressure drop in the heat reclaim unit. See Fig, 2.
Check valves prevent refrigerant back flow to the coil not in
use.
Figure 2 - JUH Heat Reclaim Unit piping arrangement when
total heat of rejection exceeds capacity of heat reclaim unit.
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JUH HEAT RECLAIM UNIT HEATERS
CIRCUITING ARRANGEMENT
Each JUH Heat Reclaim Unit has a total of 16 “face tubes”. Five (5) different circuiting arrangements are
available, consisting of various combinations of 4, 6, 8, 10 and 12 tube circuits, totalling 16 tubes.
(1) 2 - 8 face tube circuits (standard models)
(2) 1 - 6 face tube circuit and 1 - 10 face tube circuit
(3) 1 - 4 face tube circuit and 1 - 12 face tube circuit
(4) 1 - 4 face tube circuits and 2 - 6 face tube circuits
(5) 2 - 4 face tube circuits and 1 - 8 face tube circuit
No other combinations are avilable.
JUH MODEL JUH2-23 JUH2-30 JUH3-35 JUH3-45
(1)
4
FACE TUBE
CIRCUIT
6
FACE TUBE
CIRCUIT
8
FACE TUBE
CIRCUIT
10
FACE TUBE
CIRCUIT
12
FACE TUBE
CIRCUIT
4 FACE TUBE
CIRCUIT
6 FACE TUBE
CIRCUIT
8 FACE TUBE
CIRCUIT
10 FACE TUBE
CIRCUIT
12 FACE TUBE
CIRCUIT
HEAT RECLAIM CAPACITY PER CIRCUIT - MBH (kW) R-22
20°F (11°C) T.D.
30°F (17°C) T.D.
40°F (22°C) T.D.
50°F (28°C) T.D.
20°F (11°C) T.D.
30°F (17°C) T.D.
40°F (22°C) T.D.
50°F (28°C) T.D.
20°F (11°C) T.D.
30°F (17°C) T.D.
40°F (22°C) T.D.
50°F (28°C) T.D.
20°F (11°C) T.D.
30°F (17°C) T.D.
40°F (22°C) T.D.
50°F (28°C) T.D.
20°F (11°C) T.D.
30°F (17°C) T.D.
40°F (22°C) T.D.
50°F (28°C) T.D.
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
14.3 (4.2) 17.8 (5.2) 21.4 (6.3) 26.6 (7.8)
21.5 (6.3) 26.7 (7.8) 32.1 (9.4) 39.8 (11.7)
28.6 (8.4) 35.5 (10.4) 42.8 (12.5) 53.1 (15.6)
35.8 (10.5) 44.4 (13.0) 53.5 (15.7) 66.4 (19.4)
21.5 (6.3) 26.6 (7.8) 32.1 (9.4) 39.8 (11.7)
32.2 (9.4) 40.0 (11.7) 48.2 (14.1) 59.7 (17.5)
42.9 (12.6) 53.3 (15.6) 64.1 (18.8) 79.6 (23.3)
53.7 (15.7) 66.6 (19.5) 80.2 (23.5) 99.5 (29.1)
26.8 (8.4) 35.5 (10.4) 42.8 (12.5) 53.1 (15.6)
42.9 (12.6) 53.3 (15.6) 64.2 (18.8) 79.6 (23.3)
57.2 (16.8) 71.0 (20.8) 85.5 (25.0) 106.1 (31.1)
71.6 (21.0) 88.8 (26.0) 106.9 (31.3) 132.7 (38.9)
35.8 (10.5) 44.4 (13.0) 53.5 (15.7) 66.4 (19.4)
53.6 (15.7) 66.6 (19.5) 80.3 (23.5) 99.5 (29.1)
71.5 (20.9) 88.8 (26.0) 106.9 (31.3) 132.6 (38.8)
89.5 (26.2) 111.0 (32.5) 133.6 (39.1) 165.9 (48.6)
42.9 (12.6) 53.3 (15.6) 64.2 (18.8) 79.7 (23.3)
64.4 (18.9) 80.0 (23.4) 96.3 (28.2) 119.4 (35.0)
85.8 (25.1) 106.5 (31.2) 128.3 (37.6) 159.2 (46.6)
107.4 (31.5) 133.2 (39.0) 160.4 (47.0) 199.1 (58.3)
CONNECTION SIZES - O.D.S. - IN. (MM)
INLET 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5)
OUTLET 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5)
INLET 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5)
OUTLET 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5)
INLET 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5) 1 3/8 (35.0)
OUTLET 1 1/8 (28.5) 1 1/8 (28.5) 1 1/8 (28.5) 1 3/8 (35.0)
INLET 1 1/8 (28.5) 1 1/8 (28.5) 1 3/8 (35.0) 1 3/8 (35.0)
OUTLET 1 1/8 (28.5) 1 1/8 (28.5) 1 3/8 (35.0) 1 3/8 (35.0)
INLET 1 1/8 (28.5) 1 3/8 (35.0) 1 3/8 (35.0) 1 5/8 (41.0)
OUTLET 1 1/8 (28.5) 1 3/8 (35.0) 1 3/8 (35.0) 1 5/8 (41.0)
NOTES: • For R12 use R22 ratings x .95. For R502, use R22 ratings x 0.98
• TD = Condensing temperature minus entering air temperature
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LEDOMHUJ32-2HUJ03-2HUJ53-3HUJ54-3HUJ
03/15/2007
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DIMENSIONAL DATA
ATADLANOISNEMID
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mm
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4/1464/1464/1094/109
2361236129222922
65650808
2241224123022302
8/118/118/118/31
5.825.825.8253
8/118/118/118/31
5.825.825.8253
3.343.347.857.85
22.122.166.166.1
932972033793
801721051081
ATADLACIRTCELE
4/1-24/1-24/1-34/1-3
681-2681-2681-3681-3
29.029.083.183.1
40.140.165.165.1
08.208.202.402.4
08.208.202.402.4
06.506.504.804.8
ATADNOITACILPPA
8.96.413.415.12
44.426.694.657.9
3.564.791.593.341
6.922.441.340.96
0005008400570027
632562204535933
0
NA TIONAL REFRIGERA TION &
AIR CONDITIONING CANADA CORP.
CANADA
159 ROY BL VD., BRANTFORD, ONT ARIO, CANADA N3R 7K1
PHONE: 1-800-463-9517 (519)751-0444 FAX (519)753-1140
Due to National Refrigeration’s policy of continuous product improvement, we reserve the right to make changes without notice.
USA
985 WHEELER WA Y, LANGHORNE, P A. 19047 USA
PHONE:1-888-KEEPUS1 OR 1-888-533-7871
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