Environmental
Series
Air Curtains
INSTALLATION & OPERATING INSTRUCTIONS & PARTS MANUAL
FOR ALL 120 and 220 VOLT
1/4, 1/2 AND 3/4 H.P. MOTOR MODELS
READ CAREFULLY BEFORE ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE, OR MAINTAIN THE
PRODUCT DESCRIBED. PROTECT YOURSELF AND OTHERS BY OBSERVING ALL SAFETY INFORMATION.
FAILURE TO COMPLY WITH INSTRUCTIONS COULD RESULT IN PERSONAL INJURY AND/OR PROPERTY
DAMAGE!
RETAIN INSTRUCTIONS FOR FUTURE REFERENCE.
REFER TO INDIVIDUAL MODEL NUMBERS
1
2
12 / ”
FOR UNIT WIDTH
7
8
11 / ”
3
4
15 / ”
1
4
3 / ”
Figure 1
Figure 2 Dimensions
Note that all dimensions are the same on all
Description
Leading Edge air curtains produce a wall of continuously environmental series units. Model number indicates
flowing air that acts as a thermal barrier against outside width of unit.
air and flying insects. These air curtains maintain interior (Example: E4800 indicates a 48” wide unit.)
conditioned temperature and prevent heated or cooled
air from escaping through open doorways. They reduce
Unpacking
1. With packaged unit on the floor, carton arrows should
point upward.
humidity and loss of cold air when used over freezer and
cooler doors. High traffic area doors can be left open,
eliminating wear and nuisance of opening and closing
automatic and manual doors. Used over service
entrances, receiving doors, customer entrances, access
doors, etc. ... air curtains provide protection against
insects, dust, odor, fumes and other contaminant’s.
2. Carefully remove staples from top of carton and fold
back sides.
Specifications and Performance
AVG. CFM AT NOZZLE FOR MOTOR SHOWN
IN VARIOUS CABINET SIZES
MAX.
MOTOR
WATTS
120V, 60HZ
MAX.
220V, 50HZ
MAX.
MAX.
FT. PER MIN.
AT NOZZLE
MAX.
RPM
HP
AMPS
AMPS
36”
38”
42”
48”
60”*††
2000
1/4
1100
1745
1700
125
480
750
3.4
5.2
7.8
.7
2500
3800
4850
1620
1670
1795
2880
3040
3880
1/2
3/4
2.2
2.6
2460
3140
2535
3240
2730
3480
4375
5570
†† Two motor unit. *3/4 HP = 64” Cabinet.
Installation
1. Using template provided, determine mounting
3. Remove two screws from switch box and remove
cover.
location.
2. Drill holes and attach mounting hardware (not
included).
NOTE: Motor is prewired to high/low toggle switch. (See
wiring diagram, Figure 5.)
IMPORTANT:THE HARDWARE AND THE
SUPPORTING STRUCTURE MUST BE CAPABLE OF
SUPPORTING A MINIMUM 150 LB. LOAD.
4. Run wires from power supply to switch box using
appropriate wiring according to local code. (Use a
flexible connector to allow for possible angle
adjustment.)
NOTE: All installation should be done to meet local
building code.
5. Connect wires to the two lead wires provided with wire
nuts (not included). Connect black supply to center
terminal of rocker switch, white neutral to white (for
220 volt units, L2 will connect to black or white with
black tape lead), green grounding lead to grounded
conductor of supply circuit. No loose strands or loose
connections should be present. After splices are
made, wires should be spread apart so that the green
and white wires are on one side of outlet box and the
black wires are on other side. Turn splices upward and
carefully push all wiring into outlet box.
3. Mount cabinet on wall and securely tighten hardware.
4. Replace motor/blower assembly in cabinet. Secure
two wing nuts on blower base. Reconnect motor
electric cord plug assembly.
5. Replace intake grille with louvers facing down and
refasten knurled nuts.
ELECTRICAL CONNECTIONS
6. Replace switch box cover.
7. Unit is ready for operation.
WARNING: ALL AIR CURTAINS SHOULD BE
INSTALLED BY QUALIFIED PERSONNEL.
CAUTION: Make sure amp rating of any ON/OFF
switch exceeds nameplate amp rating of motor.
1. Connect motor per nameplate to correct power supply.
Use adequate size wire for all branch and feeder runs.
8. Restore power.
2. Install all wiring, protection and grounding in
accordance with the National Electrical Code (NEC)
and all local requirements.
NOTE: Air curtain has high/low selector switch. See
Operation section for proper setting instructions.
WARNING: THIS FAN HAS AN INTERNAL SELF
RESETTING THERMAL OVERLOAD PROTECTOR.
ALWAYS DISCONNECT FROM POWER SUPPLY
BEFORE SERVICING.
9. Upon completion of all installation, inspect unit for
excessive vibration during operation. If excessive
vibration is noticeable, disconnect power supply.
Inspect mounting installation and refer to
Troubleshooting Chart for probable cause.
CAPACITOR
AMP PLUG
AMP PLUG
BLACK
WHITE
RED
BLACK
WHITE
RED
HI SPEED
COMMON
LOW SPEED
EARTH
BLACK
WHITE
RED
BLACK
WHITE
RED
HI SPEED
COMMON
LOW SPEED
EARTH
M
F
M
F
GREEN
GREEN
LOW
HI
LOW
HI
GND
GND
SWITCH
SWITCH
BLACK
L1
(W) N
(B) L2
MOTOR
MOTOR
BLACK
L1
(W) N
(B) L2
Above for 1/4, 1/2 and 3/4 HP 120 volt motors and
1/2 and 3/4 HP 220 volt motors.
Above for 1/4 HP 220 volt motor.
3
Operation
1. After power has been connected to unit, fans will start
NOTE: Air direction settings are shown in Figures 6, 7,
and 8.
in either preset (high/low) speed selection.
2. Air velocity is controlled by selection of high or low
speed indicator. This feature allows the setting of air
velocity to individual desired performance and energy
efficiency.
IMPORTANT. IN FREEZER APPLICATIONS, UNIT IS
ALWAYS MOUNTED OUTSIDE (WARM SIDE) OF
FREEZER OR COOLER.
NOTE: Cold air will try to escape near floor level. Warm
air will try to penetrate curtain near top of doorway. Air
flow can be controlled by direction of nozzle louvers and
by high/low settings.
3. Air direction at outlet can be controlled by adjustable
vanes at the nozzle which compensates for possible
draft conditions.
Figure 6 - Desired Air Flow
Figure 7 - Desired Air Flow Adjustment Figure 8 - Desired Air Flow
Adjustment for Temperature and for Insect and Dust Control.
Humidity Control.
Adjustment for Freezer and
Cooler Applications.
Maintenance
WARNING: ALWAYS DISCONNECT POWER SUPPLY
BEFORE SERVICING.
WARNING: ALWAYS DISCONNECT POWER SUPPLY
BEFORE SERVICING.
LUBRICATION
1. Remove motor/blower assembly. All motor/blower
assemblies are designed for easy removal and service
with wing nuts and quick disconnect electrical
connections.
Ball bearings are permanently lubricated and require no
further lubrication.
CLEANING
2. Place motor/blower assembly on workbench.
1. The air door cabinet may be wiped off with a damp
cloth. Do not allow motor to get wet. Do not use
solvents or harsh detergents.
3. To replace blower wheel, remove the three slotted hex
head screws on outer blower ring assembly (See
Figure 9, Replacement Parts Illustration.) The wheel
is held onto shaft by one hex head screws.
NOTE: Keep air intake louvers clear of dirt and dust
accumulation which could affect performance.
IMPORTANT: NOTE POSITION OF WHEELS TO
PREVENT RUBBING WHEN REPLACED.
2. Check blower wheels for accumulated dirt twice a year
and clean. If disassembly is required, see GENERAL
SERVICING section.
4. To remove motor:
a. Remove blower wheels. (See Step 3 above.)
b. Remove blower scrolI (six hex head screws).
c. Unscrew and remove motor mounts.
GENERAL SERVICING
WARNING: IF SERVICING IS REQUIRED, IT SHOULD
BE DONE BY QUALIFIED PERSONS ONLY.
5. Replace motor/blower assembly.
4
Troubleshooting Chart
POSSIBLE CAUSE(S)
SYMPTOM
CORRECTIVE ACTION
Fan inoperative
1. Blown fuse or open circuit breaker.
2. Electricity turned off.
3. Loose cord connection.
1. Replace fuse or reset circuit breaker.
2. Contact local power company.
3. Re-check all connections.
4. Replace.
4. Defective capacitor or motor.
Excessive noise
1. Wheel rubbing on housing.
2. Motor base or blower not securely
anchored.
1. Center wheel.
2. Tighten mounting bolts.
3. Replace motor.
3. Defective motor bearings.
Insufficient air flow
1. Improper voltage.
1. Reconnect to proper voltage.
2. Open.
3. Remove any obstruction.
4. Position toggle switch to high.*
5. Clean.
2. Outlet louvers closed.
3. Intakes obstructed.
4. Motor speed setting on low.
5. Dirty blower wheels
Too much air flow
1. Motor speed setting on high.
1. Position toggle switch to low.*
Fans cut out on
thermal overload
(self-resets)
1. Low voltage.
2. Obstruction to blower wheel.
1. Verify correct wire size.
2. Remove obstruction.
* 120-220 volt models only.
5
Replacement Parts
For Air Curtain Cabinets
1.
3
6
5
4
2
Figure 9 - Replacement Parts Illustration.
Replacement Parts List For Air Curtain Cabinets
Key
No.
Part Numbers for Cabinets (length)
Description
36"
38"
42"
48"
60"
1
2
3
4
Cabinet box assembly
Cabinet Intake Grille
Cabinet Intake grill knurled nut
Cabinet louver kit
Electric box
ACCA36A
API3685
AP0002
ACL36
ACCA38A
API3885
AP0002
ACL38
ACCA42A ACCA48A
ACCA60A
API6085
AP0002
ACL60
API4285
AP0002
ACL42
ACEB
API4885
AP0002
ACL48
ACEB
5
ACEB
ACEB
ACEB
6
Electric box cover
ACFPSPC
ACFPSPC
ACFPSPC ACFPSPC
ACFPSPC
6
Replacement Parts
For Motor Blower Assemblies (7)
14
12
11
13
16
15
8
10
9
Figure 9 - Replacement Parts Illustration.
Replacement Parts For Air Curtain Cabinets
Key
No.
7
Part Numbers for Motor Blower Assemblies
Description
Motor/Blower Assembly
120V 1-ph
220V 1-ph
208-230/460V 3-ph
Switch plate cover
Rocker switch
1/4HP
1/2HP
3/4HP
ACMB125
ACMB225
ACMB325
ACFPSH
C1220
ACMB150
ACMB250
ACMB350
ACFPSH
C1220
ACMB175
ACMB275
ACMB375
ACFPSH
C1220
8
9
10
11
Cord, female plug
Motor Assembly
ACW316
ACW316
ACW316
120V 1-ph
220V 1-ph
208-230/460V 3-ph
ACM1025
ACM2025
ACM3025
AP058
ACCP1025
ACBH67
ACM1050
ACM2050
ACM3050
AP058
ACCP1025
ACBH67
ACM1075
ACM2075
ACM3075
AP058
ACCP1075
ACBH79
12
13
14
15
16
Resilient motor ring kit
Capacitor
Blower housing
Blower wheel-right
Blower wheel-left
ACBW67R
ACBW67L
ACBW67R
ACBW67L
ACBW79R
ACBW79L
7
LIMITED WARRANTY
All products manufactured by Marley Engineered Products are warranted against defects in
workmanship and materials for five years from date of installation. This warranty does not apply
to damage from accident, misuse, or alteration; nor where the connected voltage is more than
5% above the nameplate voltage; nor to equipment improperly installed or wired or maintained
in violation of the product’s installation instructions. All claims for warranty work must be
accompanied by proof of the date of installation.
The customer shall be responsible for all costs incurred in the removal or reinstallation of
products, including labor costs, and shipping costs incurred to return products to Marley
Engineered Products Service Center. Within the limitations of this warranty, inoperative units
should be returned to the nearest Marley authorized service center or the Marley Engineered
Products Service Center, and we will repair or replace, at our option, at no charge to you with
return freight paid by Marley. It is agreed that such repair or replacement is the exclusive
remedy available from Marley Engineered Products.
THE ABOVE WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR
IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE WHICH EXCEED THE AFORESAID EXPRESSED WARRANTIES
ARE HEREBY DISCLAIMED AND EXCLUDED FROM THIS AGREEMENT. MARLEY
ENGINEERED PRODUCTS SHALL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES
ARISING WITH RESPECT TO THE PRODUCT, WHETHER BASED UPON NEGLIGENCE,
TORT, STRICT LIABILITY, OR CONTRACT.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so
the above exclusion or limitation may not apply to you. This warranty gives you specific legal
rights, and you may also have other rights which vary from state to state.
For the address of your nearest authorized service center, contact Marley Engineered Products
in Bennettsville, SC, at 1-800-642-4328. Merchandise returned to the factory must be
accompanied by a return authorization and service identification tag, both available from Marley
Engineered Products. When requesting return authorization, include all catalog numbers shown
on the products.
HOW TO ORDER REPAIR PARTS
In order to obtain any needed repair or
replacement parts, warranty service or technical
information, please contact Marley Engineered
Products Service Center toll-free by calling 1-800-
470 Beauty Spot Rd. East
Bennettsville, SC 29512 USA
642-HEAT.
ECR 35189
Part No. 5200-2409-001
03-02
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