Keeprite JUH3-35 Installation Manual

JUH Heat Reclaim
Unit Heaters

For Refrigeration Systems

Bulletin K90-JUH-PDI-10

1064634

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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

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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.

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.