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ENVIRONMENTAL SERIES

ELECTRICALLY HEATED AIR CURTAINS

8 KW THROUGH 48 KW

36” THROUGH 144”

Read Carefully - These instructions are written to help you

prevent difficulties that might arise during installation of the

unit. Studying the instructions first may save you consider-

able time and money later. Observe the following proce-

dures, and cut your installation time to a minimum.

CAUTION - TO REDUCE RISK OF FIRE AND ELECTRIC

SHOCK OBSERVE THE FOLLOWING:

1. Disconnect all power coming to the unit at main service panel

before wiring or servicing. Lock service panel to prevent power

from being switched on accidentally.

NOTE: Do not depend upon a thermostat or other switch as the sole

means of disconnecting power when installing or servicing the unit.

Always disconnect power at the main service panel as described

above.

2. All wiring should be done by a qualified electrician, using copper

wire only and in accordance with the National Electrical Code

(NEC), all applicable code and ordinances, including fire rated

construction, and all sections of this manual. Any variance voids

the warranty and may create unsafe conditions.

3. To prevent the risk of electric shock, the unit must be properly

grounded. This should be accomplished by connecting a bond-

ing conductor between the disconnecting means and the

grounding lug provided in the Main Control Box of the unit. Each

cabinet wiring compartment is provided with grounding lugs for

connecting bonding conductors between each cabinet and the

Main Control Box. To ensure a proper ground, the grounding

means must be tested by a qualified electrician.

4. Verify the power supply voltage coming to unit matches the rat-

ings printed on the heater nameplate before energizing.

5. This unit can be hot when in use. To avoid burns, do not let bare

skin touch hot surfaces.

6. Do not insert or allow foreign objects to enter any ventilation or

exhaust opening as this may cause an electric shock, fire or

damage to the unit.

7. Do not block air intakes or exhaust in any manner. Keep com-

bustible materials, such as crates, drapes, etc., away from air

curtain.

8. This unit has hot and arcing or sparking parts inside. Do not use

it in areas where gasoline, paint or flammable liquids are used

or stored.

9. Use this unit only as described in this manual. Any other use

not recommended by the manufacturer may cause fire, electric

shock, or injury to persons. If you have questions contact the

manufacturer.

10. This unit is not approved for use in corrosive atmospheres such

as marine, green house or chemical storage areas.

READ AND SAVE THESE INSTRUCTIONS

WARNING

Dear Owner,

Congratulations! Thank you for purchasing this new air curtain manufactured by Marley Engineered Products. You have made

a wise investment selecting the highest quality product in the industry. Please carefully read the installation and

maintenance instructions shown in this manual. You should enjoy years of efficient service with this product from Marley

Engineered Products... the industry’s leader in design, manufacturing, quality and service.

... The Employees of Marley Engineered Products

Installation & Maintenance Instructions

15 3/4”

3”

Refer to individual model numbers

or unit width

1/4”

4 7/8”

11 7/8”

Summary of content (12 pages)

PAGE 1
® ENVIRONMENTAL SERIES ELECTRICALLY HEATED AIR CURTAINS 8 KW THROUGH 48 KW 36” THROUGH 144” Refer to individual model numbers for unit width 13” 11 7/8” 15 3/4” 4 7/8” 8 1/4” Installation & Maintenance Instructions Dear Owner, Congratulations! Thank you for purchasing this new air curtain manufactured by Marley Engineered Products. You have made a wise investment selecting the highest quality product in the industry.
PAGE 2
Environmental Series Specifications and Performance MODEL NUMBER NOZZLE WIDTH (IN) Volts AC Heater Watts BTU/HR NUMBER # MOTORS @ OF HP CABINETS CONTROL VOLTAGE AIR DELIVERY @ NOZZLE OUTLET MAX VEL AVG VEL AIRFLOW (FPM) (FPM) (CFM) 1/2 HP Models E36081#50HE 36 # 8000 27,320 1 @ 1/2 1 24 3800 E42081#50HE 42 # 8000 27,320 1 @ 1/2 1 24 3800 E48081#50HE 48 # 8000 27,320 1 @ 1/2 1 24 3800 E60081#50HE 60 # 8000 27,320 1 @ 1/2 1 24 3800 E72162#50HE 72 # 16000 54,640 2 @ 1/2 2 24 3800 E84162#50HE 84 # 16000
PAGE 3
CAUTION ! THIS HEATED AIR CURTAIN AND ITS SUB-ASSEMBLIES AND CONTROLS SHOULD BE INSTALLED BY QUALIFIED PERSONNEL, USING COPPER WIRES AND IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE (NEC) AND ALL APPLICABLE LOCAL CODES AND ORDINANCES. NOTE: A MAIN DISCONNECT OR CIRCUIT BREAKER IS REQUIRED AHEAD OF THE MAIN PANEL OF THIS HEATED AIR CURTAIN. ! WARNING ALWAYS DISCONNECT POWER AT THE MAIN DISCONNECT OR CIRCUIT BREAKER BEFORE INSTALLING OR SERVICING THIS HEATED AIR CURTAIN.
PAGE 4
Important Note: The portion of the sensing tube that attaches to the blower has an opening that must face the blower and be positioned near the center of the blower inlet. This should not be removed or disturbed during the romoval and reinstallation of the blower assembly into the cabinet. After reasembly, check to make sure this sensing tube has not been damaged or dislodged. In the control compartment, the sensing tube attaches to the “LOW” port on the pressure differential switch.
PAGE 5
7. Replace intake grille with louvers facing down and fasten knurled nuts. Field Power Wiring: Refer to Wiring Diagram and Nameplate. ! WARNING ALL HEATED AIR CURTAINS SHOULD BE INSTALLED BY QUALIFIED PERSONNEL. 1. Before wiring be sure that available power supply, voltage, phase and frequency corresponds to that specified on unit rating plate. In addition, make certain that service capacity is sufficient to handle load imposed by the heated air curtain. 2.
PAGE 6
For 3 Cabinet Units: 108”, 120”, 132” and 144” See Figure 6 CAUTION ! THE HARDWARE AND THE SUPPORTING STRUCTURE MUST BE CAPABLE OF SUPPORTING A MINIMUM 500 LB LOAD. NOTE: All installation should be done to meet local building codes. 1. Determine mounting location of center cabinet (See Figure 6). 2. Using template provided, determine mounting location for Cabinet A (left side), left of center cabinet. 3. Drill holes and attach mounting hardware (not included) for Cabinet A. 4.
PAGE 7
GENERAL SERVICING ! WARNING IF SERVICE IS REQUIRED, IT SHOULD BE DONE BY QUALIFIED PERSONS ONLY. ALWAYS DISCONNECT POWER SUPPLY BEFORE SERVICING 1. 2. 3. 4. 6. To replace heater assembly: Do the reverse of Step 5 above. NOTE: To re-assemble, repeat steps 4, 5 and 6 in installation section for single cabinet units. 7. Replace motor/blower assembly. To remove motor/blower assembly, repeat steps 4, 5, 6 and 7 in “Unpacking” section. Place motor/blower assembly on workbench.
PAGE 8
WIRING DIAGRAM: 240V, 208V, 480V - Single cabinet, 8KW, 12KW and 16KW KW LOAD PER UNIT: FIELD WIRING THERMOSTAT (FIELD INSTALLED) R DOOR SWITCH (FIELD INSTALLED) W G CWB1 MOTOR CODE VOLTS 240 208 480 50 1/2 HP 8 12 15 6 9 11.25 8 12 16 75 3/4 HP 8 12 15 6 9 11.
PAGE 9
WIRING DIAGRAM: 480V - Three cabinets, 8KW and 12KW FIELD WIRING *CONNECTION CHART FOR PRIMARY OF MULTIPLE TAP TRANSFORMER: LEGEND A1,A2...................AUTOMATIC RESET PROTECTION R1......................HEATING RELAY R2......................FAN RELAY HR1, HR2, HR3...........HEATING CONTACTORS FR1, FR2, FR3...........FAN CONTACTORS T.......................CONTROL TRANSFORMER FU......................CONTROL FUSE PL1, PL4, PL6...........PILOT LIGHT, HEAT ON PL2.....................
PAGE 10
WIRING DIAGRAM: 240V, 208V - Three cabinets, 8KW, 12KW and 15KW FIELD WIRING LEGEND A1, A2...................AUTOMATIC RESET PROTECTION R1.........................HEATING RELAY R2.........................FAN RELAY CB1, CB2, CB3.....CIRCUIT BREAKERS HR1, HR2, HR3....HEATING CONTACTORS FR1, FR2, FR3 .....FAN CONTACTORS T ...........................CONTROL TRANSFORMER FU.........................CONTROL FUSE PL1, PL4, PL6 ......PILOT LIGHT, HEAT ON PL2 .......................PILOT LIGHT, POWER ON PL3 ........
PAGE 11
6 5 7 4 2 3 1 Nameplate DATE CODE MODEL NO. E4808-1550HE Figure 10 Replacement Parts List for Air Curtain Cabinets Ref. No. Description 1 Cabinet Intake Grille 2 Electric Box Cover 3 Front Control Panel 4 Motor Assembly 5 Heater Element Set 6 Cabinet Box Assembly 7 Main Control Panel 0105 CFID: XXXXXXXXXX 48” 480V HEATED AIR CURTAIN LE WARNING- RISK OF FIRE. DO NOT USE AS A RESIDENTIAL OR HOUSEHOLD HEATER. 8 480-3 480-3 P M HEATER VOLTS-PH 60 HZ MOTOR VOLTS-PH 60 HZ, .5 AMPS 10.
PAGE 12
LIMITED WARRANTY All products manufactured by Marley Engineered Products are warranted against defects in workmanship and materials for eighteen months 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.