NOTE: Heaters over 48 amps require supplemental fusing.
SAVE THESE INSTRUCTIONS
PPD 4161612/135200-11199-002
IMPORTANT INSTRUCTIONS
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WARNING
WHEN USING ELECTRIC APPLIANCES, BASIC PRECAUTIONS SHOULD ALWAYS BE FOLLOWED TO REDUCE THE
RISK OF FIRE, ELECTRIC SHOCK, AND INJURY TO PERSONS, INCLUDING THE FOLLOWING:
1. Read all instructions before installing or using this heater.
2. This heater is a commercial/industrial product not intended
for use in a residential setting.
3. This heater has hot and arcing or sparking parts inside and
is not intended for use in hazardous atmospheres where
flammable vapors, gases, liquids or other combustible
atmospheres as defined in the National Electrical Code are
used or stored. Failure to comply can result in explosion or
fire.
4. This heater is hot when in use. To avoid burns, do not let
bare skin touch hot surfaces. Keep combustible materials,
such as furniture, pillows, bedding, papers, clothes, etc. and
curtains at least 3 feet (0.9 m) from the front of the heater.
5. Extreme caution is necessary when any heater is used by or
near children or invalids and whenever the heater is left
operating and unattended.
INSTALLATION
!
6. Do not operate any heater after it malfunctions. Disconnect
power at service panel and have heater inspected by a reputable electrician before using.
7. Do not use outdoors.
8. To disconnect heater, turn controls to OFF, and turn OFF
power to heater circuit at main disconnect panel.
9. 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 heater.
10. To prevent a possible fire, do not block air intake or exhaust
in any manner.
11. Use this heater only as described in this manual. Any other
use not recommended by the manufacturer may cause fire,
electric shock, or injury to persons.
12. When installing, see INSTALLATION INSTRUCTIONS for
additional warnings and precautions.
13. For safe and efficient operation, and to extend the life of your
heater, keep your heater clean - See MAINTENANCE
INSTRUCTIONS.
NOT FOR RESIDENTIAL USE.
INSTRUCTIONS
To prevent a possible fire, injury to persons or damage to the
heater, adhere to the following:
Important Note: This heater must be installed by a qualified
person.
1. Disconnect all power coming to heater at main service panel
before wiring or servicing.
2. All wiring procedures and connections must be in accordance with the National and Local Codes having jurisdiction
and the heater must be grounded.
CAUTION: All electrical conduit and fittings must be listed for
watertight applications to maintain the NEMA 4X enclosure
classification to prevent hose-directed water from entering electrical box.
3. Verify the power supply voltage coming to heater matches
the ratings as shown on the heater nameplate.
CAUTION: ENERGIZING HEATER AT A VOLTAGE GREATER
THAN THE VOLTAGE PRINTED ON THE NAMEPLATE WILL
DAMAGE THE HEATER AND VOID THE WARRANTY AND
COULD CAUSE A FIRE.
General
Heater Location Instructions:
Arrange units so their discharge air streams:
A. Are subjected to minimum interference from columns,
machinery and partitions.
B. Wipe exposed walls without blowing directly at them.
C. Are directed away from room occupants in comfort heating.
D. Are directed along the windward side when installed in a
building exposed to a prevailing wind.
WARNING
4. To reduce the risk of fire, do not store or use gasoline or other
flammable vapors and liquids in the vicinity of the heater.
5. The ceiling or wall mounting structure and the anchoring provisions must be of sufficient strength to support the combined
weight of the heater and mounting bracket. See
Specificatinos for total weight.
6. Heater must be mounted for horizontal air flow only. The
heater must be mounted at least 7’ (2134 mm) above the
floor to avoid accidental contact with the fan blade which
could cause injury.
7. Keep at least 5’ (1524 mm) clearance in front of the heater.
Refer to Figure 2 for side, top and back clearance requirements.
8. Do not mount mercury type thermostat directly on unit.
Vibration could cause heater to malfunction.
9. Outlet grille is factory formed with louvers set at a 45 ° angle.
This is the minimum angle allowable to avoid potential overheating. Louvers may be opened up to 90° if desired to allow
for better air throw by bending each louver outward. See
Figure 3.
If not provided with internal thermostat, locate remote thermostat
on interior partition walls or posts away from cold drafts, internal
heat sources and away from heater discharge air streams.
Figure 1
2
!
A
Wall
Ceiling
Floor
6" Min.
(152 mm)
D
Ceiling
Wall
8" Min.
(203 mm)
B
Floor
7' Min.
(2134 mm)
7' Min.
(2134 mm)
9" Min.
(229 mm)
Wall
6"
(152 mm)
C
Ceiling
Floor
45° Minimum
Angle
Figure 2
Dimensions Inches (mm)
kWAB C D
2-1013 (330)19.5 (495)18 (457)19.5 (495)
12.5-39.020 (508)31 (787)27 (686)24.2 (615)
Small rooms can be heated by one unit heater. Where two walls
are exposed, the heater should be mounted as shown in
Figure 1.
Large rooms require multi-unit installations. Number and capacity of units will be determined by volume of building and square
feet of floor area to be heated. Arrange units to provide perimeter
air circulation where each unit supports the air stream from
another.
Mounting Heaters with supplied Universal
Mounting Bracket
NOTICE — These heaters are designed for wall and ceiling
mounting with horizontal air discharge only. Other modes of
mounting voids factory warranty.
1. Height above floor
A. In areas where ceiling height is more than 12 feet (3658
mm), recommended mounting height is approximately 10
feet (3048 mm) to underside of heater.
B. For ceiling heights of 12 feet (3658 mm) or less, maximum
mounting height is determined by use of the mounting
bracket offered for these heaters. Minimum spacing to ceiling is 9” (229 mm). (See Figure 2.)
C.In either case the minimum mounting height is 7 feet (2134
mm) from floor to bottom of heater. (Figure 2)
2. Spacing to adjacent walls (See Figure 2).
A. Rear of case to back wall 6” (152mm) minimum.
B. Side of case to side wall 8” (203 mm) minimum.
NOTE: If two or more units are operated in the same enclosed
air space, their discharges should be directed to aid in development of mass air movement for uniform heat dispersal.
Wiring
Refer to wiring diagram included with the unit.
The wiring diagram can be found on the inside of the door to the
wiring compartment. Should you have any questions, please
contact Technical Service at 800-642-4328. Have your model
number found on the name plate for reference.
ALL ELECTRICAL CONDUIT AND FITTINGS MUST BE LISTED
FOR WATERTIGHT APPLICATIONS TO MAINTAIN THE NEMA
4X ENCLOSURE CLASSIFICATION TO PREVENT HOSE
DIRECTED WATER FROM ENTERING ELECTRICAL BOX.
NOTE: All electrical wiring must be done according to National
Electrical and local codes by a qualified person.
IMPORTANT NOTE - Installation Screw Lug Torque: During
transportation it is possible screw lug connections can loosen.
After installation, before power is turned on to the heater, check
all screw lug connections for tightness to a recommended minimum torque of 35 in-lbs. (3.9 N-m). A tool is included for tightening lugs in hard to reach locations
ELECTRIC SHOCK HAZARD. ANY INSTALLATION INVOLVING ELECTRIC HEATERS MUST BE PERFORMED BY A
QUALIFIED PERSON AND MUST BE EFFECTIVELY
GROUNDED IN ACCORDANCE WITH THE NATIONAL
ELECTRICAL CODE TO ELIMINATE SHOCK HAZARD.
1. Connect heater according to the voltage and frequency specified on the nameplate.
2. All units are provided with control and power terminal blocks
for customer’s connection.
3. Protection against overheating is provided by an internal
automatic thermal cutout (manual reset cutout optional)
which opens the electric circuit if the normal air-flow is
restricted or stopped. Cutout automatically energizes heater
on removal of the obstruction. If optional manual reset is
tripped, determine cause before re-energizing.
Figure 3 - Louver Adjustment
THE SYSTEM DESIGNER IS RESPONSIBLE FOR THE
SAFETY OF THIS EQUIPMENT AND SHOULD INSTALL
ADEQUATE BACK-UP CONTROLS AND SAFETY DEVICES
WITH THEIR ELECTRIC HEATING EQUIPMENT. WHERE THE
CONSEQUENCES OF FAILURE COULD RESULT IN
PERSONAL INJURY OR PROPERTY DAMAGE, BACK-UP
CONTROLS ARE ESSENTIAL.
3
4. Heaters are equipped with fan delay control. This control continues fan operation for a short time after elements are deenergized to dissipate residual heat.
NOTE: If a Manual-Reset Cutout option is provided, the RESET
button will be marked and accessible on the control panel. This
safety control will operate only if the heater overheats.
FAN BLADE ROTATION MUST BE CHECKED. IF AIRFLOW IS
NOT MOVING OUT THROUGH THE OUTLET GRILLE,
INTERCHANGE ANY TWO OF THE THREE INCOMING
SUPPLY POWER LEADS ON THREE-PHASE UNITS ONLY.
Optional Equipment
• Built-in Thermostat (bulb and capillary type) for automatic
temperature control. The thermostat controls the heating
elements and fan simultaneously to achieve set temperature.
The Lo setting of the thermostat is approximately 40˚F and
the Hi setting is approximately 90˚F.
• Mode Switch (heater on, heater off, fan only) to permit air
flow with or without energizing the heating elements. The
switch is accessible from outside the NEMA 4X enclosure.
• Pilot Light to indicate when heating elements are energized.
• Internal Fusing
• Manual Reset Limit
• ON/OFF Switch
• For wiring diagram containing options, see label on inside
cover of terminal box.
OPERATING
INSTRUCTIONS
1. Heater must be properly installed before operation.
2. To check out the installation, turn the Mode Switch to the
OFF position. Turn power ON to the heater at the main disconnect panel and check to see that the heater is not operating. If it is operating, disconnect power and check wiring.
3. Rotate built-in (or remote mounted) thermostat clockwise to
the highest heat setting. With Heat-Cool Switch in OFF position, heater should not operate.
4. Turn Heat-Cool Selector Switch to the Fan Only position. The
fan should come on and operate with no heat.
5. Turn Heat-Cool Selector Switch to the Heat position. The fan
and heater should come on producing heat.
6. The heater should be allowed to operate with the thermostat
at max or high heat until room temperature reaches the
desired level. The thermostat should then be rotated counterclockwise until the heater elements turn off (an audible click).
This should set the thermostat to cycle the heater on and off
to maintain the ambient temperature. Fine adjustments may
need to be made to obtain the desired room ambient. Slight
rotating of the thermostat in the clockwise direction will
increase the room ambient while rotation in the counterclockwise direction will lower the room ambient. If remote
thermostat is provided, follow the instructions provided with
thermostat
NOTE: A built in fan delay will cause the fan to run after the elements turn off to dissipate residual heat.
NOTE: If a Disconnect Switch option is provided, this switch will
be accessible from the outside of the control box and will be
marked ON and OFF accordingly. In the OFF position, the
heater will not operate.
DO NOT TAMPER WITH OR BYPASS ANY SAFETY LIMITS
INSIDE HEATER.
MAINTENANCE
INSTRUCTIONS
It is important to keep this heater clean. Your heater will give you
years of service and comfort with only minimum care. To assure
efficient operation follow the simple instructions below.
ALL SERVICING BEYOND SIMPLE CLEANING THAT
REQUIRES DISASSEMBLY SHOULD BE PERFORMED BY
QUALIFIED SERVICE PERSONNEL.
TO REDUCE RISK OF FIRE AND ELECTRIC SHOCK OR
INJURY, DISCONNECT ALL POWER COMING TO HEATER
AT MAIN SERVICE PANEL AND CHECK THAT THE ELEMENT
IS COOL BEFORE SERVICING OR PERFORMING
MAINTENANCE.
User Cleaning Instructions:
1. Turn off power to heater and allow elements to cool.
2. Vacuum or hose off heater with water (at city pressure)
before activating for next heating season to remove accumulated dust or lint which otherwise may smoke or incinerate on
initial heat up.
3. Return power to heater and check to make sure it is operating properly.
Maintenance Cleaning Instructions:
(To be performed only by Qualified Service Personnel)
At least annually, the heater should be cleaned and serviced by
a qualified service person to assure safe and efficient operation.
This should include as necessary, vacuuming dust and debris
from the elements and fan, and check all screw lug connections
for tightness to a recommended minimum torque of 35 in-lbs.
(3.9 N-m) using the included tool(s) for hard to reach lugs if necessary. After completing the cleaning and servicing, the heater
should be fully reassembled and checked for proper operation.
IMPORTANT NOTE: For heaters used in a hose down application, it is recommended that periodically after the heater has
been hosed down (with power off at panel) the wiring enclosure
cover be opened and the interior inspected for water penetration.
If water is discovered, the heater must be repaired by a qualified
electrician to assure the seals are properly installed.
During each cleaning, all seals should be inspected for damage
as it is critical that they maintain a water tight seal. If damage is
discovered (such as tears or cracking), they should be replaced
or repaired with an appropriate silicone sealant.
4
Replacement Parts
5
4
2
6
1
10
13
11
12
14
8
9, 9A
7, 7A
3
Elements (1)
Heater KW120 V208 V240 V277 V480 V600 V
21802-11012-0011802-11012-0021802-11012-003--
DescriptionPart Number
Thermostat (13)5813-11010-000
Gasket (Not Shown)5206-11009-000
7
All products manufactured by Marley Engineered Products are warranted against defects in workmanship and materials for one year from date of installation.
LIMITED WARRANTY
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 OBTAIN WARRANTY SERVICE AND
WARRANTY PARTS PLUS GENERAL INFORMATION
1. Warranty Service or Parts1-800-642-4328
2. Purchase Replacement Parts1-800-654-3545
3. General Product Informationwww.marleymep.com
Note: When obtaining service always have the following:
1. Model number of the product
2. Date of manufacture
3. Part number or description
470 Beauty Spot Rd. East
Bennettsville, SC 29512 USA
PPD 4161612/135200-11199-002
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