RefPlus EH Series User manual

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INDUSTRIAL WALK-IN
EVAPORATORS
EH-EI-EQ-EX-LQ-DQ
SERIES
INSTALLATION, OPERATION
AND MAINTENANCE
MANUAL
AWEF
REGISTERED

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TABLE OF CONTENTS
1. SAFETY CONSIDERATIONS ...................................................................................................... 4
2. INTRODUCTION.......................................................................................................................... 4
3. PRODUCT DESCRIPTION .......................................................................................................... 4
4. NOMENCLATURE ....................................................................................................................... 5
5. HANDLING AND RIGGING.......................................................................................................... 6
5.1 STANDARD UNIT WEIGHTS ................................................................................................................................. 7
5.2 R-448A OPERATING CHARGES (LB.) ................................................................................................................... 8
6. INSTALLATION ............................................................................................................................ 9
6.1 COMPLETE PRE-INSTALLATION INSPECTION ................................................................................................... 9
6.2 INSTALLATION LOCATION .................................................................................................................................... 9
6.3 MOUNTING............................................................................................................................................................. 9
6.4 CONNECTING DRAIN LINE ................................................................................................................................... 11
6.5 CONNECTING REFRIGERANT LINES .................................................................................................................. 11
6.6 CONNECTING THE EXPANSION VALVE .............................................................................................................. 12
6.7 BULB LOCATION AND INSTALLATION.................................................................................................................. 12
6.8 SUCTION LINE CONSTRUCTION ......................................................................................................................... 13
6.9 EXTERNAL EQUALIZER LOCATION ..................................................................................................................... 15
6.10 FIELD WIRING...................................................................................................................................................... 15
7. START UP.................................................................................................................................... 16
7.1 LEAK TESTING AND EVACUATION....................................................................................................................... 16
7.2 FAN MOTORS......................................................................................................................................................... 16
7.3 FAN DELAY DEFROST TERMINATION CONTROL............................................................................................... 16
7.4 FAN DELAY DRAIN PAN CONTROL ...................................................................................................................... 16
7.5 ADJUSTING EVAPORATOR PRESSURE AND SUPERHEAT ............................................................................... 16
8. DEFROST SYSTEM .................................................................................................................... 17
8.1 AIR DEFROST UNITS. ........................................................................................................................................... 17
8.2 ELECTRIC DEFROST UNITS................................................................................................................................. 17
8.3 REVERSE-CYCLE HOT-GAS DEFROST UNITS. .................................................................................................. 17
8.4 THREE-PIPE HOT-GAS DEFROST UNITS............................................................................................................ 17
9. SERVICE ..................................................................................................................................... 18
9.1 INITIAL INSPECTION ............................................................................................................................................. 18
9.2 PERIODIC INSPECTIONS...................................................................................................................................... 18
9.3 CLEANING .............................................................................................................................................................. 18
10. TROUBLESHOOTING CHART.................................................................................................. 19
11. REPLACEMENT PARTS............................................................................................................ 19
12. EVAPORATOR START-UP REPORT FORM ............................................................................. 20
13. WIRING DIAGRAMS.................................................................................................................. 22
13.1 EH-EI MODELS - AIR, ELECTRIC & HOT GAS DEFROST ................................................................................. 22
13.2 EQA MODELS - AIR DEFROST (HIGH-SPEED FAN MOTORS (OPTIONAL)).................................................... 23
13.3 EQA-EXA MODELS - AIR DEFROST (TWIN-SPEED FAN MOTORS (OPTIONAL)) ........................................... 24
13.4 EQA-EXA MODELS - AIR DEFROST (LOW-SPEED FAN MOTORS).................................................................. 25
13.5 EQE-EXE MODELS - ELECTRIC DEFROST (TWIN-SPEED FAN MOTORS (OPTIONAL))............................... 26
13.6 EQE-EXE MODELS - ELECTRIC DEFROST (HIGH-SPEED FAN MOTORS FOR ROOMS
OF LESS THAN 32OF (0OC) .................................................................................................................................. 27
13.7 EQ-EX MODELS - HOT-GAS DEFROST (TWIN-SPEED FAN MOTORS)........................................................... 28
13.8 EQ-EX MODELS - HOT-GAS DEFROST (HIGH-SPEED FAN MOTORS FOR ROOMS
OF LESS THAN 32OF (0OC) .................................................................................................................................. 29
13.9 EQ-EX MODELS - HOT-GAS DEFROST W / ELECTRIC DRAIN PAN (TWIN-SPEED FAN MOTORS) ............. 30
13.10 EQ-EX MODELS - HOT-GAS DEFROST W / ELECTRIC DRAIN PAN (HIGH-SPEED FAN MOTORS
FOR ROOMS OF LESS THAN 32OF (0OC) ........................................................................................................31
13.11 EQ-EX MODELS (ECM BLUE FAN MOTORS)................................................................................................... 32
14. PIPING DIAGRAMS............................................................................................................................................. 33
14.1 EH-EI MODELS - HOT-GAS DEFROST ............................................................................................................... 33
14.2 EQ-EX MODELS - REVERSE-CYCLE DEFROST WITH HOT-GAS DRAIN PAN................................................ 34
14.3 EQ-EX MODELS - THREE-PIPE DEFROST WITH HOT-GAS DRAIN PAN......................................................... 35
14.4 EQ-EX MODELS - REVERSE-CYCLE DEFROST WITH ELECTRIC DRAIN PAN .............................................. 36
14.5 EQ-EX MODELS - THREE-PIPE DEFROST WITH ELECTRIC DRAIN PAN ....................................................... 37
GENERAL WARRANTY................................................................................................................... 38

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1. SAFETY CONSIDERATIONS
Installing, starting up, and servicing equipment can be
hazardous due to system pressures, electrical components
and equipment location (elevated structures, etc.). Only
trained and qualied installers as well as service technicians
should install, start-up and service this equipment.
When working on the equipment, observe precautions found
in the literature, on the tags, stickers, and labels attached to
the equipment.
Follow all safety codes. Wear safety glasses and work
gloves. Keep quenched cloths and re extinguisher nearby
when brazing. Use care in handling, rigging, and setting
bulky equipment. Units are factory pressurized with dry air at
approximately 40 psig. Be careful when opening the circuit.
If no pressure is present, check for leaks or loose valves.
Work in a well-ventilated location when using refrigerant.
WARNING! Before installation, always check to
make sure main power to systems is OFF.
Electrical shock can cause personal injury or
death.
2. INTRODUCTION
These instructions describe installation, start-up and service
of refrigeration duty, large industrial evaporator units.
3. PRODUCT DESCRIPTION
EQ,EX,EH,EI,LQ and DQ series are large ceiling-
mounted industrial walk-in evaporators. EQ, LQ and DQ
series are AWEF registered. Each unit includes a wiring
diagram that meets the customer’s requirements. The wiring
diagram displays all the components with all the necessary
protections and controls.
EQ,EX,EH and EI series are single coil construction for an
air distribution towards the centre of the cooler and freezer.
The fans draw air from the evaporator coil and discharge it
through the fan guards at the front of the unit.
LQ and DQ series are dual coil construction. On the LQ
series, the fans draw air from below the unit and discharge
it through the evaporator coils on both sides of the unit. On
the DQ series, the fans draw air from the evaporator coil and
discharge it vertically through the fan guards underneath the
unit.
For all series, coils are manufactured with seamless
deoxidized heavy wall smooth copper tubes and
aluminum ns. For a maximum heat transfer, the tubes are
mechanically expanded into self-spaced ns with full collar
for a permanent bond.
Connections and bends are brazed with high-temperature
brazing alloy. Coils are factory leak tested at 300 psig and
purged with a -40°F dew point dry air. Coils are ready for
HFC, HFO and CO2 refrigerants and are provided with sweat
type connections (several coating materials are available).
All units are modular design and use a minimum amount of
parts for easy part replacement and availability.
All controls, motors and heaters are factory wired to provide
a fully automatic operation of the unit.
Casing for all models is made from heavy-gauge galvanized
steel. All units come with stainless steel or plated hardware
for a lightweight and rustproof assembly. Other optional
materials are available.
EQ,EX,EH and EI series are provided with removable
1 1/4” female pipe thread drain tting for easy installation
and cleaning when installed with a drain union. LQ and DQ
series are provided with removable 7/8” female pipe thread
drain ttings.
EH and EI models are equipped with AC standard-efciency
fans. EQ, EX, LQ and DQ are equipped with 800mm (31.5")
high-efciency cast-aluminum industrial fans. This exible,
economical and environmentally friendly fan system enables
high air side pressures, ideal efciency and quiet operation.
Fans are designed with a polymer aerodynamic ventury
for maximum air-ow dynamics. Seven sickle-shaped fan
blades are made from cast aluminum for good corrosion
resistance, low weight, excellent airow output and sound
power reduction.
All units are provided with an insulated drain pan and
assembled with corrosion-free components.
All standard EQE, EXE, EHE, EIE, LQE and DQE models
are provided with a defrost termination switch, heater safety
thermostat and fan delay thermostat. All units feature incoloy
low watt density tubular heaters. They are embedded within
the coil for positive defrost and high-energy efciency. This
allows heat gain reduction in coolers and freezers. They are
available for 208-240/3/60, 480/3/60 and 575/3/60. 240/3/60
and 480/3/60 can be used on 200/3/50 and 380/3/50. All
units use proper number of heaters for an even phase
loading. Refer to the wiring diagrams (Section 13) for heater
arrangement.
EQG, EXG, EHG, EIG, LQG, DQG, EQH, EXH, EHH,
EIH, LQH and DQH models are provided with fan motor
contactors, heater contactors, drain pan heater safety,
fan delay and defrost termination thermostats. These
thermostats sense the coil temperature and control the
operation of fans and heaters. All units feature incoloy low
watt density tubular heaters in the drain pan.
EQT, EXT, EHT, EIT, LQT and DQT models are provided
with fan delay, defrost termination thermostat and hot gas
defrost pan grid.

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4. NOMENCLATURE
OPTIONS #2A
W = Water / glycol mixture
VOLTAGE
1 = 120/1/60
2 = 240/1/60
5 = 208-240/3/60
8 = 575/3/60
9 = 480/3/60
2350 = 235 000 BTU/H
043 = 4300 BTU/H
*Can vary from 2 to 4 digits
MODEL NUMBER / NOMINAL CAPACITY @ 10°FTD
UNIT SERIES
EH = Large industrial walk-in
EI = High velocity large industrial walk-in
EQ = Large industrial walk-in with high-efficiency motor(s)
EX = High velocity large industrial walk-in with high-efficiency motor(s)
LQ = Low velocity large industrial walk-in with high-efficiency motor(s)
DQ = Down flow large industrial walk-in with high-efficiency motor(s)
DEFROST TYPE
MODEL GENERATION
A = Air defrost
E = Electric defrost
G = Reverse cycle defrost with electric drain pan
H = Three-pipe defrost with electric drain pan
R = Reverse cycle defrost with hot gas drain pan
T = Three-pipe defrost with hot gas drain pan
0-6 = Conventional refrigerant generation
7-9 = CO2generation
OPTIONS
A = AWEF compliant
L = Low speed
X AE 2350 L0 8 W
- -

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5. HANDLING AND RIGGING
Good handling and rigging practices must be followed
to protect units from damage. Having proper handling
equipment at the job site is most important and it should be
planned.
In the US, follow OSHA 1926.251 standard for Rigging
Equipment and Material Handling.
In Canada, follow your province’s requirements for
hoisting and rigging.
Improper rigging of a load or a rigging failure
can expose riggers and other workers nearby to
a variety of potential hazards.
Always lift units secured to the fork lift to
prevent it from slipping off.
Equipment handling and rigging should be
carried out by a certied operator.
Your unit is shipped with support legs and crated on a pallet.
This prevents any damage to the drain pan underneath. To
fasten the unit to the ceiling, it is recommended to leave it
on the pallet in order to securely lift it up with a motorized or
hand-operated forklift.
Do not use a forklift against sheet metal panels or coils.
Make sure forks extend the entire length of the unit and
against a structural part or frame.
Units must be mounted with steel rod hangers, as shown
below. Refer to section 6.3 for more information. LQ and DQ
units should be titled so that drain ttings are on the lower
side, to allow proper draining.
This procedure is for reference only. Rigging and handling
procedures will vary from one machine to another and from
one site to another.
SUPPORT
LEGS
STEEL ROD
HANGERS
Figure 1 Secure handling with forklift and installation of unit
HANDLING AND RIGGING

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STANDARD UNIT SHIPPING WEIGHTS
5.1 STANDARD UNIT SHIPPING WEIGHTS (LB.)
MODEL SHIPPING
WEIGHT MODEL SHIPPING WEIGHT MODEL SHIPPING WEIGHT
EHA-04500 480 EHE-04000 560 EH*-04000 500
EHA-05400 500 EHE-04800 590 EH*-04800 520
EHA-06200 545 EHE-06000 640 EH*-06000 565
EHA-09000 805 EHE-08000 960 EH*-08000 835
EHA-10800 850 EHE-09600 1,018 EH*-09600 880
EHA-12400 940 EHE-12000 1,125 EH*-12000 970
EHA-16200 1,240 EHE-14000 1,495 EH*-14000 1,280
EHA-18600 1,335 EHE-18000 1,610 EH*-18000 1,375
EHA-24800 1,880 EHE-24000 2,036 EH*-24000 1,940
* EHR/EHG/EHT/EHH
MODEL SHIPPING
WEIGHT MODEL SHIPPING WEIGHT
EIE-04400 560 EI*-04400 500
EIE-05400 590 EI*-05400 520
EIE-06800 640 EI*-06800 565
EIE-08800 960 EI*-08800 835
EIE-10800 1,018 EI*-10800 880
EIE-13600 1,125 EI*-13600 970
EIE-16200 1,495 EI*-16200 1,280
EIE-20400 1,610 EI*-20400 1,375
EIE-27200 2,250 EI*-27200 1,940
* EIR/EIG/EIT/EIH
MODEL SHIPPING
WEIGHT MODEL SHIPPING WEIGHT MODEL SHIPPING WEIGHT
EQA-05400 670 EQA-04500L 670 EQA-04900A 670
EQA-06500 690 EQA-05300L 690 EQA-05800A 690
EQA-07800 735 EQA-06000L 735 EQA-06800A 735
EQA-10900 1,085 EQA-09100L 1,085 EQA-09900A 1,085
EQA-13200 1,130 EQA-10600L 1,130 EQA-11600A 1,130
EQA-15700 1,220 EQA-12000L 1,220 EQA-13600A 1,220
EQA-19600 1,610 EQA-15800L 1,610 EQA-17500A 1,610
EQA-23600 1,705 EQA-18100L 1,705 EQA-20400A 1,705
EQA-26100 2,120 EQA-21200L 2,120 EQA-23400A 2,120
EQA-31500 2,340 EQA-24100L 2,340 EQA-26500A 2,340
EQA-39200 2,450 EQA-30300L 2,450 EQA-34200A 2,450
EQA-43300 2,750 EQA-33000L 2,750 N/A N/A
MODEL SHIPPING
WEIGHT MODEL SHIPPING WEIGHT
EQE-05400 750 EQE-04800A 750
EQE-06400 780 EQE-05700A 780
EQE-07700 830 EQE-06700A 830
EQE-10600 1,240 EQE-09600A 1,240
EQE-12900 1,300 EQE-11500A 1,300
EQE-15400 1,405 EQE-13400A 1,405
EQE-19500 1,865 EQE-17200A 1,865
EQE-23100 1,980 EQE-20300A 1,980
EQE-31200 2,400 EQE-26800A 2,400
EQE-38400 2,500 EQE-33700A 2,500
MODEL SHIPPING
WEIGHT MODEL SHIPPING WEIGHT
EQ*-05400 690 EQ*-04900A 690
EQ*-06500 710 EQ*-05800A 710
EQ*-07800 755 EQ*-06800A 755
EQ*-10900 1,115 EQ*-09900A 1,115
EQ*-13200 1,160 EQ*-11600A 1,160
EQ*-15700 1,250 EQ*-13600A 1,250
EQ*-19600 1,650 EQ*-17500A 1,650
EQ*-23600 1,745 EQ*-20400A 1,745
EQ*-26100 2,180 EQ*-23400A 2,180
EQ*-31500 2,400 EQ*-26500A 2,400
EQ*-39200 2,500 EQ*-34200A 2,500
EQ*-43300 2,800 N/A N/A
* EQR/EQG/EQT/EQH
MODEL SHIPPING
WEIGHT MODEL SHIPPING WEIGHT
EXA-06100 670 EXA-05000L 670
EXA-07300 690 EXA-05800L 690
EXA-08900 735 EXA-06800L 735
EXA-12300 1,085 EXA-10000L 1,085
EXA-15000 1,130 EXA-11800L 1,130
EXA-18000 1,220 EXA-13600L 1,220
EXA-22200 1,610 EXA-17600L 1,610
EXA-27200 1,705 EXA-20500L 1,705
EXA-29300 2,120 EXA-23500L 2,120
EXA-36200 2,340 EXA-27300L 2,340
EXA-44800 2,450 EXA-37500L 2,450
EXA-51100 2,750 EXA-41000L 2,750
MODEL SHIPPING
WEIGHT MODEL SHIPPING WEIGHT
EXE-05800 750 EX*-06100 690
EXE-07200 780 EX*-07300 710
EXE-08800 830 EX*-08900 755
EXE-12000 1,240 EX*-12300 1,115
EXE-14600 1,300 EX*-15000 1,160
EXE-17400 1,405 EX*-18000 1,250
EXE-22000 1,865 EX*-22200 1,650
EXE-26800 1,980 EX*-27200 1,745
EXE-35600 2,400 EX*-29300 2,180
EXE-43700 2,500 EX*-36200 2,400
N/A N/A EX*-44800 2,500
N/A N/A EX*-51100 2,800
* EXR/EXG/EXT/EXH

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5.2 R-448A OPERATING CHARGES (LB.)
MODEL OPERATING
CHARGE MODEL OPERATING CHARGE MODEL OPERATING CHARGE
EHA-04500 7.96 EHE-04000 11.84 EH*-04000 7.96
EHA-05400 10.62 EHE-04800 16.63 EH*-04800 10.62
EHA-06200 15.93 EHE-06000 25.48 EH*-06000 15.93
EHA-09000 15.05 EHE-08000 22.36 EH*-08000 15.05
EHA-10800 20.07 EHE-09600 31.39 EH*-09600 20.07
EHA-12400 30.08 EHE-12000 48.13 EH*-12000 30.08
EHA-16200 29.49 EHE-14000 46.18 EH*-14000 53.17
EHA-18600 79.74 EHE-18000 70.78 EH*-18000 79.74
EHA-24800 105.24 EHE-24000 93.4 EH*-24000 105.24
* EHR/EHG/EHT/EHH
MODEL OPERATING
CHARGE MODEL OPERATING CHARGE
EIE-04400 11.84 EI*-04400 7.96
EIE-05400 16.63 EI*-05400 10.62
EIE-06800 25.48 EI*-06800 15.93
EIE-08800 22.36 EI*-08800 15.05
EIE-10800 31.39 EI*-10800 20.07
EIE-13600 48.13 EI*-13600 30.08
EIE-16200 46.18 EI*-16200 53.17
EIE-20400 70.78 EI*-20400 79.74
EIE-27200 93.4 EI*-27200 105.24
* EIR/EIG/EIT/EIH
MODEL OPERATING
CHARGE MODEL OPERATING CHARGE MODEL OPERATING CHARGE
EQA-05400 13.2 EQA-04500L 13.2 EQA-04900A 13.2
EQA-06500 17.61 EQA-05300L 17.61 EQA-05800A 17.61
EQA-07800 26.4 EQA-06000L 26.4 EQA-06800A 26.4
EQA-10900 24.94 EQA-09100L 24.94 EQA-09900A 24.94
EQA-13200 33.24 EQA-10600L 33.24 EQA-11600A 33.24
EQA-15700 49.88 EQA-12000L 49.88 EQA-13600A 49.88
EQA-19600 48.91 EQA-15800L 48.91 EQA-17500A 48.91
EQA-23600 73.36 EQA-18100L 73.36 EQA-20400A 73.36
EQA-26100 64.57 EQA-21200L 64.57 EQA-23400A 64.57
EQA-31500 96.84 EQA-24100L 96.84 EQA-26500A 96.84
EQA-39200 120.31 EQA-30300L 120.31 EQA-34200A 120.31
EQA-43300 160.4 EQA-33000L 160.4 N/A N/A
MODEL OPERATING
CHARGE MODEL OPERATING CHARGE
EQE-05400 10.89 EQE-04800A 10.89
EQE-06400 15.3 EQE-05700A 15.3
EQE-07700 23.43 EQE-06700A 23.43
EQE-10600 20.58 EQE-09600A 20.58
EQE-12900 28.89 EQE-11500A 28.89
EQE-15400 44.28 EQE-13400A 44.28
EQE-19500 42.48 EQE-17200A 42.48
EQE-23100 65.1 EQE-20300A 65.1
EQE-31200 85.95 EQE-26800A 85.95
EQE-38400 106.77 EQE-33700A 106.77
MODEL OPERATING
CHARGE MODEL OPERATING CHARGE
EQ*-05400 13.2 EQ*-04900A 13.2
EQ*-06500 17.61 EQ*-05800A 17.61
EQ*-07800 26.4 EQ*-06800A 26.4
EQ*-10900 24.94 EQ*-09900A 24.94
EQ*-13200 33.24 EQ*-11600A 33.24
EQ*-15700 49.88 EQ*-13600A 49.88
EQ*-19600 48.91 EQ*-17500A 48.91
EQ*-23600 73.36 EQ*-20400A 73.36
EQ*-26100 64.57 EQ*-23400A 64.57
EQ*-31500 96.84 EQ*-26500A 96.84
EQ*-39200 120.31 EQ*-34200A 120.31
EQ*-43300 160.4 N/A N/A
* EQR/EQG/EQT/EQH
MODEL OPERATING
CHARGE MODEL OPERATING CHARGE
EXA-06100 13.2 EXA-05000L 13.2
EXA-07300 17.61 EXA-05800L 17.61
EXA-08900 26.4 EXA-06800L 26.4
EXA-12300 24.94 EXA-10000L 24.94
EXA-15000 33.24 EXA-11800L 33.24
EXA-18000 49.88 EXA-13600L 49.88
EXA-22200 48.91 EXA-17600L 48.91
EXA-27200 73.36 EXA-20500L 73.36
EXA-29300 64.57 EXA-23500L 64.57
EXA-36200 96.84 EXA-27300L 96.84
EXA-44800 120.31 EXA-37500L 120.31
EXA-51100 160.4 EXA-41000L 160.4
MODEL OPERATING
CHARGE MODEL OPERATING CHARGE
EXE-05800 10.89 EX*-06100 13.2
EXE-07200 15.3 EX*-07300 17.61
EXE-08800 23.43 EX*-08900 26.4
EXE-12000 20.58 EX*-12300 24.94
EXE-14600 28.89 EX*-15000 33.24
EXE-17400 44.28 EX*-18000 49.88
EXE-22000 42.48 EX*-22200 48.91
EXE-26800 65.1 EX*-27200 73.36
EXE-35600 85.95 EX*-29300 64.57
EXE-43700 106.77 EX*-36200 96.84
N/A N/A EX*-44800 120.31
N/A N/A EX*-51100 160.4
* EXR/EXG/EXT/EXH
OPERATING CHARGES

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6. INSTALLATION
6.1 COMPLETE PRE-INSTALLATION INSPECTION
Check all items against the bill of lading to make sure all
crates and boxes have been received. Check unit for
possible damage incurred during shipment. Check for
concealed damage. If there is any shortage or damage, le
a freight claim immediately with the transport company.
Do not return damaged equipment to the factory without
prior approval. A Return Material Authorization (RMA)
must be obtained in advance. Items returned without an
RMA label will be refused. Also verify that the nameplate
electrical requirements match the available power supply.
All RefPlus units are pressurized with dry air. A lack of
pressure does not indicate a leak. Check the coil for
possible leaks before installing or returning the unit.
The following essential rules should be complied with
when installing the unit:
• All circuits, including controls and safety switches, must
be correctly connected according to the wiring diagram
supplied with the unit and/or found in this manual.
• The factory wiring cannot be modied without RefPlus'
written approval.
• All units and equipment must be installed with the
specied clearances.
• System piping must be in accordance with proper
refrigeration practices.
• Inert gas must be charged into the system piping during
brazing.
6.2 INSTALLATION LOCATION
All units should be installed ush against the ceiling. The unit
must be level in all directions to ensure proper drainage of
condensate. Refer to Figure 2 and Figure 3 for unit clearance
information.
When deciding on the location of the unit, consider the
following:
• Location of aisle racks
• Location relative to compressor for minimum pipe runs
• Location of condensate drains for minimum run
• The air pattern must cover the entire room
• Never locate units over doors or door openings
• Allow sufcient space between rear of unit and wall to
permit free return of air
IMPORTANT: Avoid placement of the unit directly above
doors and door openings where low temperature is being
maintained. Position the unit so the discharge air blows
above the doors. Install a bafe if door extends above the
blower level. Leave space equal to unit height between
bottom of unit and product. Do not stack product in front
of fans.
EQ, EX, EH and EI units should be located in a position
where the air discharge is towards the door.
The coil face on units should be away from the wall by:
• EQ, EX, EH & EI models: 1/2 coil unit height minimum -
unit height recommended
• LQ & DQ models: 15 ft minimum - 35 ft maximum
NOTE: Units with electric defrost require a minimum
clearance equal to the width (W) of the unit at the left end
when facing the fans to allow removal of defrost heaters, as
shown in Figure 2 and Figure 3.
6.3 MOUNTING
Most units can be mounted with either bolts or rod steel
hangers. When mounting unit to ceiling, use Table 1 below
to determine proper rod or bolt size. Use steel rods with
a minimum 9 Kpsi. This information should be used as
reference only.
STEEL ROD
OR BOLT
SIZE
MAXIMUM WEIGHT PER ANCHOR POINT
5/16" 200 lbs
3/8" 300 lbs
1/2" 550 lbs
Table 1 Bolt and rod size chart
The evaporator must be mounted level for proper condensate
draining. Adequate support must be provided to hold the
weight of the unit.
NOTE: The area above the unit must be sealed or
accessible to facilitate hand cleaning without the
use of tools in order to comply with National
Sanitation Foundation (NSF) Standard 7.
INSTALLATION

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1/2 H min.
1 H recommended
3’ min.
3’ min. 3’ min.
3’ min.
(W for units
w/electric defrost)
(W for units
w/electric defrost)
Air
Flow
15’ min.
35’ max.
LQ-DQ
EQ-EX EH-EI
W
Figure 2 One-evaporator clearance (H=Height of unit - W=Width of unit)
3’ min.
3’ min.
3’ min.
3’ min.
(W for units
w/electric defrost)
(W for units
w/electric defrost)
3’ min.
(W for units
w/electric defrost)
W min.
Air
Flow
Air
Flow
1/2 H min.
1 H recommended
1/2 H min.
1 H recommended
15’ min.
35’ max.
30’ min.
70’ max.
LQ-DQ LQ-DQ
LQ-DQ LQ-DQ
EQ-EX EH-EI EQ-EX EH-EI
W W
Figure 3 Multiple-evaporator clearance (H=Height of unit - W=Width of unit)
INSTALLATION