Publication No.

RU-RHX-1120A
Replaces RU-RHX-0820B

HEAVY DUTY
UNIT COOLER
Medium to Large Walk-Ins
Cooler and Freezer Applications
Designed for Walk-in Coolers and Freezers in boxes less than 3,000 sq. ft.

Air Defrost
31,200 to 253,100 BTUH

Electric Defrost
33,100 to 227,400 BTUH

Hot Gas Defrost

33,100 to 227,400 BTUH

Models were designed in anticipation of the July 2020 Department

of Energy Annual Walk-in Energy Factor (AWEF) regulations for
evaporators for Walk-in Coolers and Freezers in boxes less than
3,000 sq. ft. See pages 13-14 for AWEF compliance ratings.
2

HEAVY DUTY UNIT COOLER

Features
Russell’s Heavy Duty Unit Coolers are the ideal evaporator solution for medium and large walk-in coolers and freezers.
Designed with efficiency, performance and service in mind, the Heavy Duty Cooler line is optimized to cover Cold
Storage applications in the most effective way. The Heavy Duty units were engineered to meet the Department of
Energy’s new AWEF performance regulations and feature energy-efficient rail-mount Dual Speed EC Motors. All units
are circuited for multiple refrigerants and feature optimized circuit patterns to maximize performance. Heavy Duty
Unit Coolers have several enhanced service features including rail-mount motors, new high efficiency fan and venturi
designs, enhanced surface coil tubing, easily removable fan guards and modular fan panels, face mount defrost
heaters, hinged drain pans and shipping pallets designed to facilitate easy installation.

SIZES ELECTRIC DEFROST

There are a wide array of sizes to match your specific Electric Defrost models (RH6E or RH4E) are designed
application requirements ranging from 31,200 to 253,100 for use in coolers and freezers between 35°F to -30°F.
BTUH at a 10° TD. Models are available with air flow Electric Defrost 4 FPI models (RH4E) are designed for
spanning a range of 5,750 to 24,000 CFM. use in freezers between 32°F and -30°F. Defrost heaters
are mounted on the air intake side of the unit for optimal
HOUSING performance and easy maintenance. A lower heater is
Each unit is constructed with a rust-free, heavy gauge, installed inside the drain pan for fast, reliable drainage.
textured, aluminum housing which is light weight yet Fixed defrost termination, fan delay and heater safety
extremely durable. Models feature hinged drain pans to controls are factory mounted for optimum performance
allow for convenient servicing and maintenance. Pre- of each control function.
drilled hanger holes are provided on all units for fast
installation. HOT GAS DEFROST
There are two types of Hot Gas Defrost models available:
COIL 3-pipe Hot Gas models (RH*H or RH*K) and 2-pipe
Seamless copper tubes are staggered and mechanically Hot Gas Reverse Cycle units (RH*G or RH*L). Hot Gas
expanded into heavy gauge corrugated aluminum Defrost 6 FPI models (RH6H, RH6K, RH6G, RH6L) are
fins to assure maximum heat transfer. Die formed fin designed for use in coolers and freezers between 35°F
collars are provided for accurate fin spacing. Heavy and -30°F. Hot Gas Defrost 4 FPI models (RH4H, RH4K,
gauge hangers are fastened directly to the tube sheet RH4G, RH4L) are designed for use in freezers between
of the coil to provide high structural strength. Electric 32°F and -30°F. All units include fixed defrost termination
Defrost and Hot Gas Defrost Models are available in and fan delay controls which are factory mounted for
both 6 FPI and 4 FPI. optimum performance of each control function. Refer to
MOTORS the current Russell Technical Bulletin for piping. Reverse
Standard models feature highly efficient Dual Speed Cycle units can also be used for Alternating Evaporator
Electronically Commutated (EC) motors. which are Systems.
compliant with California Title 24 regulations1. Optional Features
FANS & FAN GUARDS • EcoNet® Enabled Controller3 (factory-installed)
Powerful heavy-duty aluminum fans are individually • EcoNet® Command Center (loose)
balanced to provide vibration free operation. Standard • Reverse Connections
heavy-gauge wire fan guards are UL/cUL-approved • Thermostat - Mechanical or Electric (mounted or
epoxy coated for corrosion resistance. Air throw for loose)
Heavy Duty Unit Coolers is 100 ft. • Thermostatic Expansion Valve (mounted or loose)
REFRIGERANTS • Electronic Expansion Valve (mounted or loose)
Heavy Duty Unit Coolers are optimized for multiple • Liquid Line Solenoid Valve (mounted or loose)
refrigerants including R404A, R407A, R448A, R449A • Insulated Drain Pan
and R744 DX (CO2). Please specify system refrigerant • Painted Cabinet (White or Black)
requirements when ordering. A separate compartment • Coated Cabinet
is provided for all refrigerant connections which allows • Stainless Steel Cabinet
ample room for internal mounting of expansion valves. • Coated Coil (Bronz-Glow, or Electrofin®)
• Heat Exchanger (loose)
ELECTRICAL
Available in 208/230V/12, 208-230V/3, 460V/1 or 460/3. Notes
A large compartment is supplied for all electrical * AWEF (Annual Walk-in Energy Factor)
components and is easily accessible by removing the 1. Single Compressor system without variable capacity.
end panel. All models are UL and cUL listed. 2. Some limitations apply. For specific electrical offering,
consult electrical data tables in this brochure.
AIR DEFROST 3. EcoNet Control Package includes: EEV; suction pressure
Air Defrost models (RH6A) are designed for use in transducer; suction, entering air coil temp. thermistors;
coolers at +35°F and warmer. thru-the-door disconnect switch; local on-board two-row
backlit LCD display and push-button adjustments.
(Controller replaces TXV, liquid line solenoid valve, room
thermostat, defrost termination and fan delay, and time
clock.)
 3

HEAVY DUTY UNIT COOLER

Highlighted Features and Options

FANS AND HOUSING COILS AND DEFROST HEATERS

• 30” heavy duty aluminum fans are balanced for • Available in 4 or 6 fins per inch (FPI)
vibration-free operation • Electric defrost heaters are mounted on the air
• High efficiency deep draw venturi provide optimal intake coil face to provide optimal performance
air flow and easy service access
• Hinged panels that can easily be removed • The drain pan heater is affixed to the drain pan
• NSF approved and is easily accessed for service or cleaning

ECONET ENABLED UNIT COOLERS (Optional)

• Developed in conjunction with Rheem Manufacturing specifically
for walk-in coolers and freezers — it builds on the reliability and
efficiency of Rheem’s EcoNet technology
• Saves energy in refrigeration systems through precise superheat
and space temperature control, fan cycling, and controlling how
often the system goes into defrost based on compressor runtime
• Eliminates unnecessary defrosts
• Maximizes energy efficiency with less compressor runtime
• Reduces fan speed to 50% during off cycle for energy savings
• Can be used with a condensing unit in single and multiple
evaporator installations as a group
• Optional EcoNet Command Center with intuitive graphical interface
controls up to 32 devices (including the Command Center) through
one display, provides continuous communication between
system components, and the remote mount display allows for
EcoNet Enabled Unit Coolers to be programmed, monitored and
troubleshot outside of the space being cooled

ELECTRICAL AND PIPING

• End panels slide out for easy service from the
front or sides of the unit
• Ample room in electrical and piping
compartments for easy access
4

HEAVY DUTY UNIT COOLER

MODEL NUMBER NOMENCLATURE
CONFIGURABLE BASE MODEL
R H 6 E 109 D D A

Fins
Per Defrost BTUH in Unit Motor
Brand Style Vintage
Inch Type Thousands Voltage Type
(FPI)
R = Russell H = Heavy Duty 4 A = Air D = 208-230/1/60 D = Dual
Y = Reverse Connections 6 E = Electric E = 208-230/3/60 Speed EC
H = Hot Gas 3-Pipe - F = 460/1/60
Electric Drain Pan G = 460/3/60
G = Hot Gas Reverse -
Electric Drain Pan
K = Hot Gas 3-Pipe -
Hot Gas Drain Pan
L = Hot Gas Reverse -
Hot Gas Drain Pan

EVAPORATOR APPLICATION RATINGS

Multiple conditions combine to determine the application capacity of an evaporator. Walk-in space temperature,
relative humidity, saturated suction temperature difference, and outdoor ambient temperature. All of the factors
are considered when calculating an evaporator application rating. These ratings are higher than the net capacity
value used for DOE ratings (AWEF).

The AWEF of an evaporator is calculated using the dry coil capacity and the daily evaporator power consumption.
Power consumption included fan and defrost power. Evaporator net capacity reported to the DOE database is dry
coil capacity less the full power fan watts. DOE test conditions are at 10°F evaporator/SST temperature difference
and less than 50% relative humidity and 96°F liquid temperature. These conditions create a uniform test method,
but should not be used for equipment selection. The equipment selected would be oversized for the application.

Russell’s published application ratings are a guideline for proper equipment selection. They account for true
operating conditions experienced by equipment.

Fan guards easily removable for quick access to

fan blades and rail-mounted motors
 5

HEAVY DUTY UNIT COOLER

Application Rating and Electrical Data - Air Defrost Models - 6 FPI
BTUH Capacity Total Fan Motor AMPS
@ 25°F S.T. &
Model 10°F TD No. of Dual Speed EC† Motors
CFM
Number Fans
R404A / R407A/ R448A/ Motor Voltage
R744 DX (CO2) R449A^ 208-230V/1 460V/1
RH6A031*DA 31,200 36,600 5,920
RH6A043*DA 43,600 51,100 5,870 1 6.3 3.1
RH6A052*DA 52,100 61,900 5,750
RH6A063*DA 63,200 73,500 11,850
RH6A087*DA 87,900 103,500 11,730 2 12.6 6.2
RH6A105*DA 105,200 124,900 11,500
RH6A132*DA 132,500 155,800 17,600
3 18.9 9.3
RH6A156*DA 156,300 185,700 17,250
RH6A175*DA 175,400 206,900 23,460
4 25.2 12.4
RH6A209*DA 209,500 253,100 23,000

208-230V/1 460V/1
Model MCA MOPD MCA MOPD
Number Base EcoNet Base EcoNet Base EcoNet Base EcoNet
Model Enabled1 Model Enabled1 Model Enabled1 Model Enabled1
RH6A031*DA
RH6A043*DA 15.0 15.0 20 20 15.0 15.0 20 20
RH6A052*DA
RH6A063*DA
RH6A087*DA 15.0 16.2 20 20 15.0 15.0 20 20
RH6A105*DA
RH6A132*DA
20.5 22.5 25 25 15.0 15.0 20 20
RH6A156*DA
RH6A175*DA
26.8 28.8 30 30 15.0 15.0 20 20
RH6A209*DA

* Each asterisk represents a variable character based on voltage ordered. See page 4 for nomenclature.
^ R407A, R448A and R449A are rated at dew point temperature. Use R407A capacity ratings for R407C and R407F.
† Dual Speed EC motors are compliant with California Title 24 regulations.
1. EcoNet Enabled Units are not powered by Condensing Unit so Defrost Heaters are incorporated into shown MCA/MOPD.

Models were designed in anticipation of the July 2020 Department of Energy Annual Walk-in Energy Factor (AWEF)
regulations for evaporators for Walk-in Coolers and Freezers in boxes less than 3,000 sq. ft. See pages 13-14 for AWEF
compliance ratings.
6

HEAVY DUTY UNIT COOLER

Application Rating and Electrical Data - Electric Defrost Models
BTUH Capacity Total Fan Motor AMPS
@ -20°F S.T. & 10°F TD1 Dual Speed EC Motors†
Model No. of
CFM Motor Voltage
Number R404A / R407A/ R448A/ Fans
R744 DX (CO2) R449A^ 208-230V/1 460V/1

6 FPI
RH6E033*DA 33,100 38,700 5,920
RH6E044*DA 44,500 50,900 5,870 1 6.3 3.1
RH6E053*DA 53,800 62,100 5,750
RH6E066*DA 66,400 76,600 11,850
RH6E089*DA 89,400 102,300 11,730 2 12.6 6.2
RH6E109*DA 109,200 125,700 11,500
RH6E134*DA 134,500 153,800 17,600
3 18.9 9.3
RH6E163*DA 163,500 188,800 17,250
RH6E199*DA 199,100 227,400 23,000 4 25.2 12.4
4 FPI
RH4E035*DA 35,800 41,100 5,870
1 6.3 3.1
RH4E044*DA 44,000 50,800 5,750
RH4E071*DA 71,400 83,000 11,730
2 12.6 6.2
RH4E087*DA 87,400 100,900 11,500
RH4E107*DA 107,700 122,900 17,600
3 18.9 9.3
RH4E131*DA 131,900 152,300 17,250
RH4E167*DA 167,000 190,200 23,000 4 25.2 12.4

208-230V/3 Heater Amps

MCA MOPD 208-230V/3
Model Heater
Number Amps Total Watts
Base EcoNet Base EcoNet No. of
Each Heater
Model Enabled2 Model Enabled2 Circuits
Circuit Amps
6 FPI
RH6E033EDA
RH6E044EDA 15.0 16.4 20 20 1 14.4 14.4 6,000
RH6E053EDA
RH6E066EDA
RH6E089EDA 15.0 30.9 20 35 1 28.9 28.9 12,000
RH6E109EDA
RH6E134EDA
20.5 45.3 25 50 1 43.3 43.3 18,000
RH6E163EDA
RH6E199EDA 26.8 59.7 30 60 2 28.9 57.7 24,000
4 FPI
RH4E035EDA
15.0 16.4 20 20 1 14.4 14.4 6,000
RH4E044EDA
RH4E071EDA
15.0 30.9 20 35 1 28.9 28.9 12,000
RH4E087EDA
RH4E107EDA
20.5 45.3 25 50 1 43.3 43.3 18,000
RH4E131EDA
RH4E167EDA 26.8 59.7 30 60 2 28.9 57.7 24,000
See notes on page 7.
 7

HEAVY DUTY UNIT COOLER

Application Rating and Electrical Data - Electric Defrost Models continued
460V/3 Heater Amps
MCA MOPD 460V/3
Model Heater
Number Amps Total Watts
Base EcoNet Base EcoNet No. of
Each Heater
Model Enabled2 Model Enabled2 Circuits
Circuit Amps
6 FPI
RH6E033GDA
RH6E044GDA 15.0 15.0 20 20 1 7.5 7.5 6,000
RH6E053GDA
RH6E066GDA
RH6E089GDA 15.0 16.1 20 20 1 15.1 15.1 12,000
RH6E109GDA
RH6E134GDA
15.0 23.6 20 25 1 22.6 22.6 18,000
RH6E163GDA
RH6E199GDA 15.0 31.1 20 35 1 30.1 30.1 24,000
4 FPI
RH4E035GDA
15.0 15.0 20 20 1 7.5 7.5 6,000
RH4E044GDA
RH4E071GDA
15.0 16.1 20 20 1 15.1 15.1 12,000
RH4E087GDA
RH4E107GDA
15.0 23.6 20 25 1 22.6 22.6 18,000
RH4E131GDA
RH4E167GDA 15.0 31.1 20 35 1 30.1 30.1 24,000
Notes:
1.
Capacity Correction for Electric and Hot Gas Defrost Evaporators
S.S.T. (Dew) 20ºF 0ºF -10ºF -20ºF -30ºF -40ºF
Multiply Capacity by: 1.15 1.075 1.0375 1 0.9625 0.925

2. EcoNet Enabled Units are not powered by Condensing Unit so Defrost Heaters are incorporated into shown MCA/MOPD.
* Each asterisk represents a variable character based on voltage ordered. See page 4 for nomenclature.
^ R407A, R448A and R449A are rated at dew point temperature. Use R407A capacity ratings for R407C and R407F.
† Dual Speed EC motors are compliant with California Title 24 regulations.
Models were designed in anticipation of the July 2020 Department of Energy Annual Walk-in Energy Factor (AWEF)
regulations for evaporators for Walk-in Coolers and Freezers in boxes less than 3,000 sq. ft. See pages 13-14 for AWEF
compliance ratings.

Supports are bolted to pallet and unit cooler

for product safety and quicker installation
8

HEAVY DUTY UNIT COOLER

Application Rating and Electrical Data - Hot Gas 3-Pipe Defrost Models
Total Fan Motor
Hot Gas BTUH Capacity AMPS
3-Pipe @ -20°F S.T. &
No. Dual Speed EC MCA
Model 10°F TD1
CFM of Motors†
Number
Fans Motor Voltage
(RH*H, R404A / R407A/ R448A/
RH*K) 208- 460V/ 208- 460V/
R744 DX (CO2) R449A^
230V/1 1 230V/1 1
6 FPI
RH6*033*DA 33,100 38,700 5,920
RH6*044*DA 44,500 50,900 5,870 1 6.3 3.1 15.0 15.0
RH6*053*DA 53,800 62,100 5,750
RH6*066*DA 66,400 76,600 11,850
RH6*089*DA 89,400 102,300 11,730 2 12.6 6.2 15.0 15.0
RH6*109*DA 109,200 125,700 11,500
RH6*134*DA 134,500 153,800 17,600
3 18.9 9.3 20.5 15.0
RH6*163*DA 163,500 188,800 17,250
RH6*199*DA 199,100 227,400 23,000 4 25.2 12.4 26.8 15.0
4 FPI
RH4*035*DA 35,800 41,100 5,870
1 6.3 3.1 15.0 15.0
RH4*044*DA 44,000 50,800 5,750
RH4*071*DA 71,400 83,000 11,730
2 12.6 6.2 15.0 15.0
RH4*087*DA 87,400 100,900 11,500
RH4*107*DA 107,700 122,900 17,600
3 18.9 9.3 20.5 15.0
RH4*131*DA 131,900 152,300 17,250
RH4*167*DA 167,000 190,200 23,000 4 25.2 12.4 26.8 15.0

Hot Gas Electric Drain Hot Gas 3-Pipe Model

3-Pipe MOPD Pan Heater The system uses 3 pipes — 1 for liquid line, 1 for
Model Amps Heater suction line and 1 for hot gas. The hot gas is taken
Number Watts from the discharge line, between the compressor
208- 460V/ 208- 460V/ and the condenser, through a hot-gas solenoid
(RH*H,
230V/1 1 230V/1 1 valve to the distributor tee then through the coil.
RH*K)
LIQUID LINE
6 FPI SOLENOID
LIQUID LINE
RH6*033*DA
RH6*044*DA 20 20 8.3 4.3 2,000
RH6*053*DA
RH6*066*DA HOT GAS LINE
RH6*089*DA 20 20 16.7 8.7 4,000
RH6*109*DA
RH6*134*DA
25 20 25.0 13.0 6,000
RH6*163*DA
RH6*199*DA 30 20 33.3 17.4 8,000
4 FPI EXPANSION
VALVE
RH4*035*DA
20 20 8.3 4.3 2,000
RH4*044*DA DISTRIBUTOR
RH4*071*DA
20 20 16.7 8.7 4,000
RH4*087*DA
* Each asterisk represents a variable character based on
RH4*107*DA voltage and defrost ordered. See page 4 for nomenclature.
25 20 25.0 13.0 6,000
RH4*131*DA 1. See capacity correction table and additional notes on page 7.
RH4*167*DA 30 20 33.3 17.4 8,000
 9

HEAVY DUTY UNIT COOLER

Application Rating and Electrical Data - Hot Gas Reverse Cycle Defrost Models
Total Fan Motor
Hot Gas BTUH Capacity AMPS
Reverse Cycle @ -20°F S.T. &
No. Dual Speed EC MCA
Model 10°F TD1
CFM of Motors†
Number
Fans Motor Voltage
(RH*G, R404A / R407A/ R448A/
RH*L) 208- 460V/ 208- 460V/
R744 DX (CO2) R449A^
230V/1 1 230V/1 1
6 FPI
RH6*033*DA 33,100 38,700 5,920
RH6*044*DA 44,500 50,900 5,870 1 6.3 3.1 15.0 15.0
RH6*053*DA 53,800 62,100 5,750
RH6*066*DA 66,400 76,600 11,850
RH6*089*DA 89,400 102,300 11,730 2 12.6 6.2 15.0 15.0
RH6*109*DA 109,200 125,700 11,500
RH6*134*DA 134,500 153,800 17,600
3 18.9 9.3 20.5 15.0
RH6*163*DA 163,500 188,800 17,250
RH6*199*DA 199,100 227,400 23,000 4 25.2 12.4 26.8 15.0
4 FPI
RH4*035*DA 35,800 41,100 5,870
1 6.3 3.1 15.0 15.0
RH4*044*DA 44,000 50,800 5,750
RH4*071*DA 71,400 83,000 11,730
2 12.6 6.2 15.0 15.0
RH4*087*DA 87,400 100,900 11,500
RH4*107*DA 107,700 122,900 17,600
3 18.9 9.3 20.5 15.0
RH4*131*DA 131,900 152,300 17,250
RH4*167*DA 167,000 190,200 23,000 4 25.2 12.4 26.8 15.0

Hot Gas Electric Drain Hot Gas Reverse Cycle 2-Pipe Model
Reverse MOPD Pan Heater A changeover valve is located in the discharge­
Cycle Model Amps Heater suction line of the compressor, so that when
defrost is required, the valve changes over
Number Watts
208- 460V/ 208- 460V/ from the normal refrigeration flow so that the
(RH*G, discharged gas flows into the suction connection
230V/1 1 230V/1 1
RH*L) and bypasses TX valve.
LIQUID LINE
6 FPI LIQUID LINE SOLENOID
RH6*033*DA
RH6*044*DA 20 20 8.3 4.3 2,000
RH6*053*DA
RH6*066*DA
RH6*089*DA 20 20 16.7 8.7 4,000
RH6*109*DA
CHECK VALVE
RH6*134*DA
25 20 25.0 13.0 6,000
RH6*163*DA
RH6*199*DA 30 20 33.3 17.4 8,000
4 FPI
RH4*035*DA EXPANSION
20 20 8.3 4.3 2,000 VALVE
RH4*044*DA DISTRIBUTOR
RH4*071*DA
20 20 16.7 8.7 4,000
RH4*087*DA * Each asterisk represents a variable character based on
voltage and defrost ordered. See page 4 for nomenclature.
RH4*107*DA
25 20 25.0 13.0 6,000 1. See capacity correction table and additional notes on page 7.
RH4*131*DA
RH4*167*DA 30 20 33.3 17.4 8,000
10

HEAVY DUTY UNIT COOLER

Distributor Nozzle and Expansion Valves - Air Defrost Models
Part Numbers No.
Model
Nozzle @ Liq. Temp. TXV^ @ Liq. Temp. EEV @ Liq. Temp. of
Number
50°F 100°F 50°F 100°F 50°F 100°F Circuits
R404A
RH6A031*DA G-1-1/2 G-4 SBFSE-B-C SBFSE-C-C SER-C SER-C 6
RH6A043*DA G-1-1/2 G-5 SBFSE-C-C OSE-6-C SER-C SER-C 6
RH6A052*DA E-2 E-6 SBFSE-C-C OSE-6-C SER-C SER-D 12
RH6A063*DA E-2-1/2 E-10 OSE-6-C OSE-6-C SER-C SER-D 9
6 RH6A087*DA C-3 C-12 OSE-6-C OSE-9-C SER-D SER-D 18
FPI RH6A105*DA C-4 C-15 OSE-9-C OSE-9-C SER-D SERI-F 18
RH6A132*DA C-5 C-20 OSE-9-C OSE-12-C SER-D SERI-F 18
RH6A156*DA C-6 C-25 OSE-9-C OSE-12-C SERI-F SERI-G 24
RH6A175*DA A-8 A-25 OSE-12-C OSE-21-C SERI-F SERI-G 27
RH6A209*DA A-10 A-30 OSE-12-C OSE-21-C SERI-F SERI-G 36
R407A/ R448A/ R449A†
RH6A031*DA G-1-1/2 G-4 SBFDE-B-C SBFDE-C-C SER-B SER-C 6
RH6A043*DA G-1-1/2 G-5 SBFDE-C-C SBFDE-C-C SER-C SER-C 6
RH6A052*DA E-2 E-6 SBFDE-C-C EBSDE-7-C SER-C SER-C 12
RH6A063*DA E-2-1/2 E-8 SBFDE-C-C EBSDE-7-C SER-C SER-D 9
6 RH6A087*DA C-4 C-12 EBSDE-7-C EBSDE-10-C SER-D SER-D 18
FPI RH6A105*DA C-4 C-15 EBSDE-7-C ODE-12-C SER-D SERI-F 18
RH6A132*DA C-5 C-17 EBSDE-10-C ODE-12-C SER-D SERI-F 18
RH6A156*DA C-6 C-20 EBSDE-12-C ODE-17-C SERI-F SERI-F 24
RH6A175*DA A-8 A-25 EBSDE-12-C ODE-17-C SERI-F SERI-G 27
RH6A209*DA A-10 A-30 EBSDE-17-C ODE-28-C SERI-F SERI-G 36
Note: The distributor lines are 1/4” tube & 31” long.
* Each asterisk represents a variable character based on voltage ordered. See page 4 for nomenclature.
^ TXV selections are based on +25°F suction temp., 8°F to 12°F evaporator TD. Contact factory for operating conditions outside of
this range.
† SBFDE , ODE, and EBSDE expansion valves are compatible with R407A, R448A and R449A/B. For other valves, follow
manufacturers selection guidelines.
Base models (no factory-mounted components) include nozzles sized for 100°F liquid shipped loose.

Russell’s Heavy Duty Unit Cooler can be used in combination with

Next-Gen II Condensing Units to provide complete refrigeration
solutions for medium and large walk-ins less than 3,000 sq. ft.
 11

HEAVY DUTY UNIT COOLER

Distributor Nozzle and Expansion Valves - Electric Defrost Models
Part Numbers No.
Model
Nozzle @ Liq. Temp. TXV^ @ Liq. Temp. EEV @ Liq. Temp. of
Number
50°F 100°F 50°F 100°F 50°F 100°F Circuits
R404A
RH6E033*DA E-3 E-8 SBFSE-C-Z EBSSE-6-Z SER-C SER-C 9
RH6E044*DA E-4 E-10 OSE-6-Z EBSSE-7-1/2-Z SER-C SER-C 9
RH6E053*DA E-5 E-12 OSE-6-Z EBSSE-10-Z SER-C SER-D 12
RH6E066*DA C-6 C-17 OSE-6-Z EBSSE-10-Z SER-C SER-D 18
6
RH6E089*DA C-10 C-20 OSE-9-Z EBSSE-13-Z SER-D SER-D 18
FPI
RH6E109*DA C-12 C-25 OSE-12-Z OSE-21-Z SER-D SERI-F 24
RH6E134*DA A-15 A-35 OSE-12-Z OSE-30-Z SER-D SERI-F 27
RH6E163*DA A-17 A-40 OSE-21-Z OSE-30-Z SERI-F SERI-G 36
RH6E199*DA A-20 A-50 OSE-35-Z OSE-45-Z SERI-F SERI-G 36
RH4E035*DA E-3 E-8 SBFSE-C-Z OSE-6-Z SER-C SER-C 9
RH4E044*DA E-4 E-12 OSE-6-Z OSE-6-Z SER-C SER-C 12
RH4E071*DA C-8 C-17 OSE-6-Z OSE-12-Z SER-C SER-D 18
4
RH4E087*DA C-10 C-20 OSE-9-Z OSE-12-Z SER-D SER-D 24
FPI
RH4E107*DA A-12 A-30 OSE-12-Z OSE-21-Z SER-D SERI-F 27
RH4E131*DA A-15 A-35 OSE-12-Z OSE-30-Z SER-D SERI-F 36
RH4E167*DA A-20 A-40 OSE-21-Z OSE-30-Z SERI-F SERI-G 36
R407A/ R448A/ R449A†
RH6E033*DA E-2-1/2 E-6 SBFDE-C-Z ODE-7-Z SER-B SER-C 9
RH6E044*DA E-4 E-8 EBSDE-7-Z ODE-12-Z SER-C SER-C 9
RH6E053*DA E-5 E-12 EBSDE-7-Z ODE-12-Z SER-C SER-C 12
RH6E066*DA C-6 C-15 EBSDE-10-Z ODE-12-Z SER-C SER-D 18
6
RH6E089*DA C-8 C-17 ODE-12-Z ODE-17-Z SER-D SER-D 18
FPI
RH6E109*DA C-12 C-25 ODE-17-Z ODE-28-Z SER-D SER-D 24
RH6E134*DA A-15 A-30 ODE-17-Z ODE-28-Z SER-D SERI-F 27
RH6E163*DA A-17 A-35 ODE-28-Z ODE-40-Z SERI-F SERI-G 36
RH6E199*DA A-20 A-40 ODE-28-Z ODE-45-Z SERI-F SERI-G 36
RH4E035*DA E-3 E-6 SBFDE-C-Z ODE-7-Z SER-C SER-C 9
RH4E044*DA E-4 E-8 SBFDE-C-Z ODE-7-Z SER-C SER-C 12
RH4E071*DA C-6 C-15 ODE-12-Z ODE-12-Z SER-C SER-D 18
4
RH4E087*DA C-8 C-17 ODE-12-Z ODE-17-Z SER-D SER-D 24
FPI
RH4E107*DA A-12 A-20 ODE-17-Z ODE-28-Z SER-D SER-D 27
RH4E131*DA A-15 A-30 ODE-17-Z ODE-28-Z SER-D SERI-F 36
RH4E167*DA A-17 A-35 ODE-28-Z ODE-40-Z SERI-F SERI-G 36
Note: The distributor lines are 1/4” tube & 31” long.
* Each asterisk represents a variable character based on voltage ordered. See page 4 for nomenclature.
^ TXV selections for Electric Defrost Models are based on -20°F suction temp., 8°F to 12°F evaporator TD. Contact factory for
operating conditions outside of this range. Do not use pressure limiting TXVs when the condensing unit includes a CPR valve.
† SBFDE , ODE, and EBSDE expansion valves are compatible with R407A, R448A and R449A/B. For other valves, follow
manufacturers selection guidelines.
Base models (no factory-mounted components) include nozzles sized for 100°F liquid shipped loose.
12

HEAVY DUTY UNIT COOLER

Distributor Nozzle and Expansion Valves - Hot Gas Defrost Models
Model Part Numbers
Nozzle @ Liq. Temp. TXV^ @ Liq. Temp. EEV @ Liq. Temp. No.
Number
of
RH*H/RH*G/
50°F 100°F 50°F 100°F 50°F 100°F Circuits
RH*K/ RH*L
R404A
RH6*033*DA E-3 E-8 SBFSE-C-Z EBSSE-6-Z SER-C SER-C 9
RH6*044*DA E-4 E-10 OSE-6-Z EBSSE-7-1/2-Z SER-C SER-C 9
RH6*053*DA E-5 E-12 OSE-6-Z EBSSE-10-Z SER-C SER-D 12
RH6*066*DA C-6 C-17 OSE-6-Z EBSSE-10-Z SER-C SER-D 18
6
RH6*089*DA C-10 C-20 OSE-9-Z EBSSE-13-Z SER-D SER-D 18
FPI
RH6*109*DA C-12 C-25 OSE-12-Z OSE-21-Z SER-D SERI-F 24
RH6*134*DA A-15 A-35 OSE-12-Z OSE-30-Z SER-D SERI-F 27
RH6*163*DA A-17 A-40 OSE-21-Z OSE-30-Z SERI-F SERI-G 36
RH6*199*DA A-20 A-50 OSE-35-Z OSE-45-Z SERI-F SERI-G 36
RH4*035*DA E-3 E-8 SBFSE-C-Z OSE-6-Z SER-C SER-C 9
RH4*044*DA E-4 E-12 OSE-6-Z OSE-6-Z SER-C SER-C 12
RH4*071*DA C-8 C-17 OSE-6-Z OSE-12-Z SER-C SER-D 18
4
RH4*087*DA C-10 C-20 OSE-9-Z OSE-12-Z SER-D SER-D 24
FPI
RH4*107*DA A-12 A-30 OSE-12-Z OSE-21-Z SER-D SERI-F 27
RH4*131*DA A-15 A-35 OSE-12-Z OSE-30-Z SER-D SERI-F 36
RH4*167*DA A-20 A-40 OSE-21-Z OSE-30-Z SERI-F SERI-G 36

R407A/ R448A/ R449A†

RH6*033*DA E-2-1/2 E-6 SBFDE-C-Z ODE-7-Z SER-B SER-C 9
RH6*044*DA E-4 E-8 EBSDE-7-Z ODE-12-Z SER-C SER-C 9
RH6*053*DA E-5 E-12 EBSDE-7-Z ODE-12-Z SER-C SER-C 12
RH6*066*DA C-6 C-15 EBSDE-10-Z ODE-12-Z SER-C SER-D 18
6
RH6*089*DA C-8 C-17 ODE-12-Z ODE-17-Z SER-D SER-D 18
FPI
RH6*109*DA C-12 C-25 ODE-17-Z ODE-28-Z SER-D SER-D 24
RH6*134*DA A-15 A-30 ODE-17-Z ODE-28-Z SER-D SERI-F 27
RH6*163*DA A-17 A-35 ODE-28-z ODE-40-Z SERI-F SERI-G 36
RH6*199*DA A-20 A-40 ODE-28-Z ODE-45-Z SERI-F SERI-G 36
RH4*035*DA E-3 E-6 SBFDE-C-Z ODE-7-Z SER-C SER-C 9
RH4*044*DA E-4 E-8 SBFDE-C-Z ODE-7-Z SER-C SER-C 12
RH4*071*DA C-6 C-15 ODE-12-Z ODE-12-z SER-C SER-D 18
4
RH4*087*DA C-8 C-17 ODE-12-Z ODE-17-Z SER-D SER-D 24
FPI
RH4*107*DA A-12 A-20 ODE-17-Z ODE-28-Z SER-D SER-D 27
RH4*131*DA A-15 A-30 ODE-17-Z ODE-28-Z SER-D SERI-F 36
RH4*167*DA A-17 A-35 ODE-28-Z ODE-40-Z SERI-F SERI-G 36
Note: The distributor lines are 1/4” tube & 31” long.
* Each asterisk represents a variable character based on defrost and voltage ordered. See page 4 for nomenclature.
^ TXV selections for Hot Gas Defrost Models are based on -20°F suction temp., 8°F to 12°F evaporator TD. Contact factory for
operating conditions outside of this range. Do not use pressure limiting TXVs when the condensing unit includes a CPR valve.
† SBFDE , ODE, and EBSDE expansion valves are compatible with R407A, R448A and R449A/B. For other valves, follow
manufacturers selection guidelines.
Base models (no factory-mounted components) include nozzles sized for 100°F liquid shipped loose.
 13

HEAVY DUTY UNIT COOLER

Specifications - Air Defrost Models
Unit
Refrigerant No. of Est.
Fan Motor Data Dimensions
Connections Hanger Unit
Models Dia. Figure (Inches)
Slot Wt.
(Inches) Motor Liquid Suction Locations
HP RPM L W H (Lbs.)
Qty. Line^ Line
6 FPI
RH6A031*DA 30 1 3/4 850 1/2 1-1/8 4 1 59-7/8 27-3/8 49-1/4 293
RH6A043*DA 30 1 3/4 850 1/2 1-3/8 4 1 59-7/8 27-3/8 49-1/4 293
RH6A052*DA 30 1 3/4 850 5/8 1-5/8 4 1 59-7/8 27-3/8 49-1/4 293
RH6A063*DA 30 2 3/4 850 5/8 1-5/8 6 2 99-7/8 27-3/8 49-1/4 489
RH6A087*DA 30 2 3/4 850 7/8 2-1/8 6 2 99-7/8 27-3/8 49-1/4 489
RH6A105*DA 30 2 3/4 850 7/8 2-1/8 6 2 99-7/8 27-3/8 49-1/4 489
RH6A132*DA 30 3 3/4 850 7/8 2-1/8 8 3 139-7/8 27-3/8 49-1/4 652
RH6A156*DA 30 3 3/4 850 1-1/8 2-1/8 8 3 139-7/8 27-3/8 49-1/4 652
RH6A175*DA 30 4 3/4 850 1-1/8 2-1/8 10 4 179-7/8 27-3/8 49-1/4 837
RH6A209*DA 30 4 3/4 850 1-1/8 2-1/8 10 4 179-7/8 27-3/8 49-1/4 837
* Each asterisk represents a variable character based on voltage ordered. See page 4 for nomenclature.
^ For units with mounted TXV components. See Nozzle/TXV table for distributor connection size when TXV is field installed.
1. For dimensional distance between hanger slots, consult model’s corresponding dimension drawing. Hanger slots are 1/2” deep x 1”
wide.
2. Drain is 1-1/4" NPT for all models.
+
If the model has a numerical value in the AWEF table below, the following statement applies: “The refrigeration system is
designed and certified for use in walk-in cooler applications less than 3,000 sq. ft.”

Shipping Information - Department of Energy Annual Walk-In Energy Factor (AWEF) Ratings
All Models Base Model Number FPI AWEF
Cooler Models - Air Defrost
+
Shipping Est.
No. Dimensions R*6A031*DA 6 9.0
Ship
of (Inches) R*6A043*DA 6 9.0
Wt.
Fans R*6A052*DA 6 9.0
L W H (Lbs.)
R*6A063*DA 6 9.0
1 69 42 66 470
R*6A087*DA 6 9.0
2 109 42 66 730
R*6A105*DA 6 9.0
3 146 42 66 1,000
R*6A132*DA 6 9.0
4 189 42 66 1,130
R*6A156*DA 6 9.0
R*6A175*DA 6 9.0
R*6A209*DA 6 9.0

TYPICAL APPLICATIONS:

Medium to Large Warehouses Cold Storage Warehouses Walk-in Coolers and Freezers
14

HEAVY DUTY UNIT COOLER

Specifications - Electric and Hot Gas Defrost Models
Refrigerant Unit
Motor Data
Model Connections No. of Dimensions Est.
Fan
Number 3-Pipe Hanger (Inches) Unit
Dia. Figure
RH*E/H/ Slot Wt.
(Inches) Motor HP RPM Liquid Suction Hot
G/ K/ L Qty. Line^ Line Gas Locations L W H (Lbs.)
Line
6 FPI
RH6*033*DA 30 1 3/4 850 1/2 2-1/8 1-1/8 4 1 59-7/8 27-3/8 49-1/4 293
RH6*044*DA 30 1 3/4 850 5/8 2-1/8 1-1/8 4 1 59-7/8 27-3/8 49-1/4 293
RH6*053*DA 30 1 3/4 850 5/8 2-1/8 1-1/8 4 1 59-7/8 27-3/8 49-1/4 293
RH6*066*DA 30 2 3/4 850 5/8 2-1/8 1-1/8 6 2 99-7/8 27-3/8 49-1/4 489
RH6*089*DA 30 2 3/4 850 7/8 3-1/8 1-1/8 6 2 99-7/8 27-3/8 49-1/4 489
RH6*109*DA 30 2 3/4 850 7/8 3-1/8 1-1/8 6 2 99-7/8 27-3/8 49-1/4 489
RH6*134*DA 30 3 3/4 850 1-1/8 3-1/8 1-3/8 8 3 139-7/8 27-3/8 49-1/4 652
RH6*163*DA 30 3 3/4 850 1-1/8 3-1/8 1-3/8 8 3 139-7/8 27-3/8 49-1/4 652
RH6*199*DA 30 4 3/4 850 1-1/8 3-1/8 1-3/8 10 4 179-7/8 27-3/8 49-1/4 837
4 FPI
RH4*035*DA 30 1 3/4 850 1/2 2-1/8 1-1/8 4 1 59-7/8 27-3/8 49-1/4 293
RH4*044*DA 30 1 3/4 850 5/8 2-1/8 1-1/8 4 1 59-7/8 27-3/8 49-1/4 293
RH4*071*DA 30 2 3/4 850 5/8 2-1/8 1-1/8 6 2 99-7/8 27-3/8 49-1/4 489
RH4*087*DA 30 2 3/4 850 7/8 3-1/8 1-1/8 6 2 99-7/8 27-3/8 49-1/4 489
RH4*107*DA 30 3 3/4 850 7/8 3-1/8 1-3/8 8 3 139-7/8 27-3/8 49-1/4 652
RH4*131*DA 30 3 3/4 850 1-1/8 3-1/8 1-3/8 8 3 139-7/8 27-3/8 49-1/4 652
RH4*167*DA 30 4 3/4 850 1-1/8 3-1/8 1-3/8 10 4 179-7/8 27-3/8 49-1/4 837

Department of Energy Annual Walk-In Energy Department of Energy Annual Walk-In Energy
Factor (AWEF) Ratings Factor (AWEF) Ratings
Base Model Number FPI AWEF Base Model Number FPI AWEF
Cooler Models - Electric and Hot Gas Defrost
+- Freezer Models++ - Electric and Hot Gas Defrost
R*6*033*DA 6 9.0 R*6*033*DA 6 4.15
R*6*044*DA 6 9.0 R*6*044*DA 6 4.15
R*6*053*DA 6 9.0 R*6*053*DA 6 4.15
R*6*066*DA 6 9.0 R*6*066*DA 6 4.15
R*6*089*DA 6 9.0 R*6*089*DA 6 4.15
R*6*109*DA 6 9.0 R*6*109*DA 6 4.15
R*6*134*DA 6 9.0 R*6*134*DA 6 4.15
R*6*163*DA 6 9.0 R*6*163*DA 6 4.15
R*6*199*DA 6 9.0 R*6*199*DA 6 4.15
R*4*035*DA 4 4.15
R*4*044*DA 4 4.15
R*4*071*DA 4 4.15
R*4*087*DA 4 4.15
R*4*107*DA 4 4.15
R*4*131*DA 4 4.15
R*4*167*DA 4 4.15
* Each asterisk represents a variable character based on style, defrost and voltage ordered. See page 4 for nomenclature.
^ For units with mounted TXV components. See Nozzle/TXV table for distributor connection size when TXV is field installed.
1. For dimensional distance between hanger slots, consult model’s corresponding dimension drawing. Hanger slots are 1/2” deep x 1”
wide.
2. Drain is 1-1/4” NPT for all models.
3. For shipping dimensions and weights, see Shipping Information table on page 13.
+
If the model has a numerical value in the table above, the following statement applies: “The refrigeration system is designed and
certified for use in walk-in cooler applications less than 3,000 sq. ft.”
++
If the model has a numerical value in the table above, the following statement applies: “The refrigeration system is designed and
certified for use in walk-in freezer applications less than 3,000 sq. ft.”
 15

HEAVY DUTY UNIT COOLER

Physical Dimensions
Side View - All Models
25-1/2
4-5/8

LIQUID Notes:
• All mounting holes are 1/2” diameter.
44-3/8 AIR
• Evaporators must be mounted with 1/2”
per foot slope to the drain fitting.
4-1/8 • All dimensions are in inches.

SUCTION
27-3/8

Figure 1 - Single Fan 4X 1/2 X 1 SLOT

38-5/8
2X 1-3/8
KNOCKOUT
24

3X 1-3/8
2X 1-3/8 KNOCKOUT
KNOCKOUT (BACKSIDE)
(BACKSIDE)
49-1/4 46-1/8

8 1-1/4 NPT DRAIN

59-7/8

Figure 2 - Two Fan

40 6X 1/2 X 1 SLOT
38-5/8
2X 1-3/8
KNOCKOUT
24

2X 1-3/8 3X 1-3/8
KNOCKOUT KNOCKOUT
(BACKSIDE) (BACKSIDE)

49-1/4 46-1/8

8 1-1/4 NPT DRAIN

99-7/8
HEAVY DUTY UNIT COOLER
Physical Dimensions
Side View - All Models
25-1/2
4-5/8

LIQUID Notes:
• All mounting holes are 1/2” diameter.
44-3/8 AIR
• Evaporators must be mounted with 1/2”
per foot slope to the drain fitting.
4-1/8 • All dimensions are in inches.

SUCTION
27-3/8

Figure 3 - Three Fan

38-5/8 40 40 8X 1/2 X 1 SLOT

2X 1-3/8
KNOCKOUT
24

3X 1-3/8
2X 1-3/8
KNOCKOUT
KNOCKOUT
(BACKSIDE)
(BACKSIDE)
49-1/4 46-1/8

8 1-1/4 NPT DRAIN

139-7/8

Figure 4- Four Fan

8X 1/2 X 1 SLOT
38-5/8 40 40 40
2X 1-3/8
KNOCKOUT
24

3X 1-3/8
2X 1-3/8
KNOCKOUT
KNOCKOUT
(BACKSIDE)
(BACKSIDE)

49-1/4 46-1/8

8 1-1/4 NPT DRAIN

179-7/8

Due to continuing product development, specifications are subject to change without notice.

201 Thomas French Drive, Scottsboro, AL 35769 • PHONE (256) 259-7400 • FAX (256) 259-7478 • russell.htpg.com
E-mail or call us for help: parts@htpg.com or 1-855-HTPARTS (1-855-487-2787)