Russell UAH2-300 User Manual

Publication No. RU-UAH-0712A

Ultra - Temp

HEAVY DUTY

UNIT COOLER

Air Defrost - 16,400 to 273,000 BTUH

Electric Defrost - 11,800 to 248,000 BTUH

Hot Gas Defrost - 11,800 to 248,000 BTUH

Large Walk-Ins
and Warehouses

Cooler & Freezer
Applications

2

ULTRA - TEMP

Features

• APPLICATIONS — Ultra-Temp unit coolers are
ideally suited for a wide range of large coolers,
freezers and blast freezers. The U*U and U*L models
are designed for use below +25°F room temperature.
The U*M and UAH models are designed for coolers
in the medium and high temperature ranges.

• SIZES — There are 61 sizes available, ranging in
capacity from 11,800 to 273,000 BTUH @ 10°TD, and
ranging in air fl ow from 2,720 to 29,900 CFM.

• HOUSING — Rust-free, heavy gauge textured
Aluminum; lightweight and durable. Air and electric
defrost models have hinged drain pans to allow for
convenient servicing and maintenance (Hot Gas
drain pans are not hinged).

• LIFTING LEGS - 2 fan models and larger are shipped
upright with removable lifting legs, allowing the
unit to be installed quickly, and easily with a forklift.
Slotted hangers are provided for fast installation.

• COIL — Seamless copper tubes are mechanically
expanded into heavy gauge corrugated Aluminum
fi ns to assure maximum heat transfer. Die formed
fi n collars are provided for accurate fi n spacing.
Hangers are fastened directly to the tube sheets of
the coil to provide high structural strength. All units
are dehydrated, sealed and shipped with a nitrogen
holding charge.

• REFRIGERANTS — For use with direct expansion,
R-22, R-404A, R-502 and R-507. Specify refrigerant
when ordering. A separate compartment is provided
for all refrigeration connections, allowing ample
room for internal mounting of expansion valve(s).
Ultra-Temps can also be used for chilled water or
glycol solutions, contact factory for selection.

• FANS — Powerful, heavy-duty Aluminum fans are
individually balanced to provide vibration-free
operation. Wire fan guards are epoxy coated for
corrosion resistance. Optional air straighteners are
available for increased air throw.

• MOTORS — All standard motors are high effi ciency
PSC, ball bearing type, life lubricated and thermally
protected. U*U and U*L models use 3/4 HP, 1075
RPM or 3/4 HP, 1625 RPM motors. U*M and UAH
models use 1/3 HP or 3/4 HP, 1075 RPM motors.
Optional EC motors are now available for all
Ultra- Temp models.

• ELECTRICAL — Available in 115/1, 208/230/1,
208/230/3, 460/1 and 460/3 (see page 10).
Ultra- Temps can also be operated on 220/1/50,
220/3/50, 380/1/50, and 380/3/50 power (contact
factory for details). All components are factory
wired to convenient screw-type terminal blocks.
A large compartment is supplied for all electrical
components and is easily accessible by removing
the end panel.

• AIR DEFROST — Available on UAM and UAH series
only for use in coolers at +35°F and above. Complete
Air Defrost systems are available from Russell.

• ELECTRIC DEFROST — Available on all but the
UAH models. Placement of the heaters within the
refrigeration coil allow for a more effi cient and rapid
defrost cycle. This arrangement enables heat to be
conducted from the center of the core out, for a
more even defrost pattern. All heaters are factory
wired to screw-type terminal blocks, allowing for a
quick fi eld change over from 1 to 3 phase or 230V
to 460V and vice versa with the use of jumpers. An
adjustable, remote bulb defrost termination and
fan delay (DTFD) is mounted and wired. Drain pans
are heated for fast, reliable drainage. Timer and
contactors are available as options, see page 11.
Complete Electric Defrost systems are available from
Russell.

• HOT GAS RE-EVAP DEFROST — Available on all
but the UAH models. Includes an adjustable defrost
termination and fan delay (DTFD), factory installed.
A hot gas drain circuit is supplied, thus eliminating
the need for electric heat and additional wiring.
A Heat Exchanger/Re-Evaporator is supplied with
every unit. Refer to the current Technical Bulletin HG
for piping. Complete Hot Gas Re-Evap systems are
available from Russell, contact factory.

• HOT GAS REVERSE CYCLE DEFROST — Available
on all but the UAH models. Includes an adjustable
defrost termination and fan delay. (DTFD) factory
installed. A hot gas drain pan circuit is supplied, thus
eliminating the need for electric heat and additional
wiring. Refer th the current Technical Bulletin HG
For piping. This unit is also used for Alternating
Evaporator Systems.

Features

Electric Defrost

Electrical Compartment

A. Defrost control (DTFD)
B. DTFD sensing bulb
C. Fin heater (typical)
D. Field wiring terminal strips
E. Fan motor capacitors

3

ULTRA - TEMP

D

C

E

B

A

F

Refrigerant Connection Compartment

Refrigerant End Compartment

(Larger two-circuit Hot Gas coil shown)

A. Hot gas supply (from drain pan)
B. Hot gas inlet to coil (two-pipe)
C. Hot gas inlet to coil (three-pipe)

Hot gas outlet from coil (two-pipe)

D. Liquid inlet from TX valve
E. Suction connection
F. External equalizer line

C

D

F

Options

• Copper fi ns.

• Coated fi ns (air and hot gas models only).

• Galvanized steel casing.

• High pressure propeller fans (up to 0.5” external pressure).

• Inherent 3 phase motors.

• Ultra low temperature motor grease for applications down to -60°F suction temperature.

• Insulated drain pans.

• Custom circuiting for chilled water or glycol applications.

• High air throw fan guards.

D

B

E

A

E

4

A

ULTRA - TEMP

Energy Savings per Motor

by Changing to More Efficient Unit Cooler Motors (based on Energy Cost of $0.10 per kWh)

Box

Cond. Unit

Energy

Savings

kWh/Yr

$/Yr

Reduced

Load

MBTU/Yr

Motor

HP and

RPM

1/3 1075 357 225 132 22 1060 106 3,617 695 70 176 0.9
3/4 1075 850 495 355 22 2851 285 9,726 1,870 187 472 0.4
3/4 1625 717 580 137 22 1100 110 3,754 722 72 182 1.0

Standard PSC

Motor Input

Power

Watts/Mtr

Optional EC

Motor Input

Power

Watts/Mtr

Reduced

Power

Consumption

Watts/Mtr

Run Time

Hrs/Day

Motor

Energy

Savings

kWh/Yr

Motor

Energy

Savings

Cond. Unit

Energy

Savings

$/Yr

Yearly

Savings

$/Motor

Pay-

back

Yrs

Yearly Savings per EC Motor

500.00

400.00

300.00

200.00

100.00

Dollars Saved

0.00
123456789101112

Months

1/3 HP EC Motor
3/4 HP (1075) EC Motor
3/4 HP (1625) EC Motor

Air Throw

Air throw is affected by installation variables. Optimum air throw is obtained by high ceiling with
no interference from beams, product or return air restrictions.

MODEL WIRE FAN GUARD

U*U / U*L

U*M / UAH

60 - 80 feet
50 - 70 feet

FAN GUARD / AIR

STRAIGHTENER

80 - 100 feet

70 - 90 feet

MODEL NUMBER NOMENCLATURE

U • U 1 – 118 – D P

MOT OR TYPE

Ultra-Temp

= Air Defrost (M & H) only
E = Electric Defrost
H = Hot Gas Re-Evap
G = Hot Gas Rev. Cycle

(U, L & M only)

U = 4 Fins/Inch (Freezer)
L = 6 Fins/Inch (Freezer)
M = 6 Fins/Inch (Cooler)
H = 8 Fins/Inch (Cooler)

Number of Fans

BTUH in Hundreds

VOLTAGE CODE

P = PERM. SPLIT

CAPACITOR

E = EC MOTOR

A = 115/1/60
D = 208-230/1/60
E = 208-230/3/60
F = 460/1/60
G = 460/3/60
J = 575/3/60