Marley K151FC, K303FC, K304FC, K204FC, K306FC Instruction Manual

14-5/16”

3

64 mm

1

-3/8”

35 mm

1-1/2”

39 mm

K Series

Fan Forced

Wall Heaters

Installation, Operation & Maintenance Instructions

Specifications

ODEL SHIP WT.

M
NUMBER VOLTAGE WATTAGE PHASE CFM AMPS (LBS.)

151FC 120 1500 1 100 12.5 22

K
K204FC 240/208 2000/1500 1 100 8.3/7.3 22
K303FC 347 3000 1 100 8.6 25
K304FC 240 3000 1 100 12.5 22

306FC 600 3000 3 100 5.0 25

K
K404FC 240/208 4000/3000 1 100 16.7/14.4 22
K403FC 347 4000 1 100 11.5 25
K406FC 600 4000 3 100 6.7 25
K408FC 208V 4000 1 100 19.2 22
K483FC 347 4800 1 100 13.8 25
K484FC 240/208 4800/3600 1 100 20.9/17.3 22
K486FC 600 4800 3 100 8 25
K4083FC 208V 4000 3 100 11.1 23
K487FC 277V/240 4800/3600 1 100 17.3 23
K488FC 208V 4800 1 100 23.1 23
K4883FC 208V 4800 3 100 13.3 23

15-3/4”

400 mm

19-1/8”

86

4

mm

3-7/8”
99 mm

18-1/4”

464

mm

IMPORTANT INSTRUCTIONS

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 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.

3. Extreme caution is necessary when any heater is used by or
near children or invalids and whenever the heater is left
operating and unattended.

4. Do not operate any heater after it malfunctions. Disconnect
power at service panel and have heater inspected by a
reputable electrician before using.

5. Do not use outdoors.

6. To disconnect heater, turn controls to OFF, and turn off
power to heater circuit at main disconnect panel.

7. 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.

!

8. To prevent a possible fire, do not block air intake or exhaust
in any manner.

9. A heater has hot and arcing or sparking parts inside. Do not
use it in areas where gasoline, paint, or flammable liquids
are used or stored.

10. 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.

11. This heater is intended for comfort heating applications and
not intended for use in special environments. Do not use in
damp or wet locations such as marine or greenhouse or in
areas where corrosive or chemical agents are present.

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.

SAVE THESE INSTRUCTIONS

PPD 41511 7/14 5200-11210-000 (ISS 1.0)

INSTALLATION
INSTRUCTIONS

To prevent a possible fire, injury to persons or damage to the
heater, adhere to the following:

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.

3. Power supply must enter back box through the knockouts.
See also TOP marking on the back box for proper
orientation.

4. 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.

5. CAUTION - High temperature, risk of fire, keep electrical
cords, drapery, furnishings, and other combustibles at least
3 feet (0.9 m) from front of heater. Do not install heater
behind doors, below towel racks, in the ceiling, or in an area
where it is subject to being blocked by furniture, curtains or
storage materials. Hot air from the heater may damage cer­tain fabrics and plastics.

6. To reduce the risk of fire, do not store or use gasoline or
other flammable vapors and liquids in the vicinity of the
heater.

7. This heater is to be mounted only using back box and may
be installed with the back box recessed or surface mounted
as described within this manual.

8. The following minimum clearances must be maintained:

Bottom of heater to floor - 8” (203 mm) - optimum height
is 18” to 24”.

Sides of heater to adjacent wall - 8” (203 mm) ­optimum minimum 12” (305 mm).

Top of heater to ceiling - 36” (915 mm).

9. Do not operate the heater without the grille installed.

10. Do not use this heater for dry out as the paint, plaster,
sawdust and drywall sanding dust will permanently damage
the heater and must be kept out of the heater.

GROUND
SCREW

BACK BOX

” MIN.

8

(203mm)

CABLE

LAMP

C

POWER SUPPLY CABLE

” MIN.

8

(203mm)

AIL OR SCREW

N
(2 EACH SIDE)

Figure 1: Locating Recessed Back Box in New Construction

NOTE: Wire compartment volume - 119 in

3

(1950 cm3).

a. Run a power supply cable into the knockout area in the

upper right hand corner of the back box. All wiring must be
in accordance with National and Local Electrical Codes.
Refer to Specifications, page 1 for correct wire size.

b. Remove knockout in the top of the back box and install a

cable clamp.

c. Insert power supply cable through cable clamp, allowing at

least 6" (152 mm) of leads to extend inside the back box.

d. Ground the back box by connecting the supply ground

lead wire to the green ground screw located in the inside
top of the back box.

Installation of Back Box in Existing Construction

1. Provide a wall opening 14-1/2" (362 mm) wide by 18-1/2"
(470 mm) high at the desired mounting height, but no closer
than 8" (203 mm) to adjacent wall or floor. (see Figure 2.)

NOTE: Locate so at least one side of opening is at wall stud.

2. Power Supply Wiring

NOTE: Wiring Compartment Volume - 119 in3 (1950 cm3).

18-1/2” MIN.

(470mm)

Installation of Back Box in New Construction

1. Mounting Back Box (see Figure 1).
a. Place the back box between two 16" (406 mm) center-

to-center wall studs at the desired mounting height but
no closer than 8" (203 mm) to adjacent wall or floor.

NOTE: If wall studs are spaced greater than 16” on center, addi­tional framing supports may be necessary.

b. Align back box such that the bottom and sides will be

flush with finished wall surface (top flange of back box
should protrude approximately 1/2" (12.7 mm) from fin­ished wall surface).

c. Secure the back box in position with wood screws or

nails as shown in Figure 1.

2. Power Supply Wiring (see Figure 1)

8” MIN.

(203mm)

CABLE CLAMP

GROUND SCREW

BACK BOX

14-1/2” MIN.

(362mm)

8” MIN.

(203mm)

POWER SUPPLY CABLE

NAIL OR SCREW
(2 EACH SIDE)

Figure 2: Locating Recessed Back Box in Existing Construction

2

a. Run a power supply cable into the area above the top of

the wall opening. All wiring must be in accordance with
National and Local electrical codes. Refer to Table 1,
page 1 for correct wire size.

b. Install a cable clamp in the knockout in the top of back

box.

c. Insert power supply cable through cable clamp, allowing at

least 6" (152mm) of cable length to remain inside the back
box to facilitate connections.

d. Ground the back box by connecting the supply ground wire

to the green ground screw located in the inside top of the
back box.

3. Mounting Back Box
a. Place the back box into wall opening flush with finished

wall surface on bottom and sides of box. (Top flange of
back box should protrude approximately 1/2" (12.7mm)
from finished wall surface).

b. Secure the back box in place with wood screws or nails.

(Optional) Installation of Back Box With
Surface-Mounting Frame (see Figure 3).

1. Secure back box to wall (with knockouts in upper right
hand corner) using screws and anchors.

2. Hang the surface-mounting frame on the back box.
Ensure that the back edge of the surface-mounting
frame is flush against the wall.

3-13/16"
(97mm)

MOUNT BACK BOX TO
WALL USING REAR
MOUNTING HOLES.

HANG FRAME
ON BACK BOX

15-5/32"

(385mm)

Figure 3: Surface Mounting Installation

NOTE: If heater is located in a high traffic area where it may be
subjected to vandalism or abuse, take extreme care to see that
the box is firmly attached to the wall.

3. Power Supply Wiring

NOTE: Wiring Compartment Volume - 119"3 (1950cm3).

a. Run a power supply cable into the area of the upper right

corner of the mounting frame. All wiring must be in accor­dance to National and local Electrical Codes. Refer to
Table 1 for proper wire sizes.

NOTE: If the wiring is to run through the wall, cut a hole in the
wall near the top of the back box. Run the supply wire through
this hole. Then remove the knockout from the top of the box and
proceed to step c.

b. Remove the knockout on the top side of the frame.
c. Feed the power supply cable through the frame allowing 6"

(152mm) of lead to remain inside the frame

d. Secure the power supply cable to the back box (using

cable clamps, connector, or other suitable strain relief)
allowing 6”(152mm) of lead to remain inside the inner
housing.

19"

(482mm)

e. Ground the back box by connecting the supply ground

leadwire to the green ground screw located in the inside
top of the back box.

Installation of Heater Assembly and Grille

After back box is completely installed and no further construction
dirt is expected, clean debris from back box, remove heater
assembly from its carton, then refer to Figure 4 and proceed as
follows:

1. Insert the heater assembly into back box, placing the four
mounting holes (with key-hole slots) over the screws in the
back box. Tighten all screws securely.

NOB

THERMOSTAT

RECESS BACK
BOX

HEATER
ASSEMBLY

Figure 4

2. If surface-mounting frame is used, ensure that the frame is
even with all four heater assembly tabs before tightening
screws.

3. Connect the lead wires from the disconnect switch to the
lead wires from the fan deck. (see wiring diagrams)
After connection, push wires back into opening.

4. Turn thermostat to the extreme counterclockwise position.

5. Mount the grille using four (4) long screws provided. The
screws thread into holes located in the side flanges of the
back box.

6. Push thermostat knob onto thermostat shaft.

1500, 4800, 4000, & 3000 WATT HEATERS

120V, 208V, 240V, OR 277V (Full wattage heaters can be
converted to half wattage by removing the red jumper wire
connecting the top and bottom element terminals.)

NOTE: Conversion not applicable on K151FC.

K

GRILLE

3

F.D.

Element

2000 & 1500 WATT HEATERS

208V, 240V, OR 277V

Manual Reset

Limit

an Motor

F

T

’Stat

G

Wiring

ND

ield

F

CAUTION - DO NOT CONTINUE TO ATTEMPT TO USE THE
HEATER IF THE SAFETY CONTROL REPEATEDLY OPER­ATES AFTER BEING RESET. TO DO SO COULD PERMA­NENTLY DAMAGE THE HEATER OR CREATE A FIRE OR
SAFETY HAZARD.

Special Note: In addition to the over-temperature safety control,
this heater is provided with a back-up thermal fuse (one shot)
that will permanently shut the heater off if for some reason the
over-temperature safety control should not function as intended.
If this thermal fuse activates, the heater will not reset and must
be repaired by a qualified repair person.

Fan Motor

Element

F.D.

lement

E

4800, 4000, & 3000 WATT HEATERS

347V, 600V

Manual Reset

T’Stat

Limit

OPERATING
INSTRUCTIONS

1. Heater must be properly installed before operation.

2. Turn power to heater on at main switch panel. Rotate the
thermostat knob fully clockwise. This should energize the
heating elements and the fan, causing air to flow from the air
discharge at the openings in the bottom of the grille.

3. After the discharge air has become warm, rotate the thermo­stat knob to the desired position to obtain room comfort.

NOTE: For best results, the heater should be left “ON” constant­ly during the heating season as the thermostat, when properly
set, will maintain the desired temperature. In the full counter­clockwise position the heater will remain off until the room tem­perature drops well below freezing.

How To Reset Over -Temperature Safety Control:

Your heater is equipped with a manual reset thermal limit safety
control that will automatically turn the heater off to prevent a fire
if the heater overheats. This control is located on the fan panel
assembly between the element and fan blade and marked
“RESET”. The red reset button can be seen through the front
grille when the heater is installed. To reset, allow the heater to
cool, then push the red button that is visible through the hole in
the fan panel. The heater should immediately return to normal
operation.

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. After the heater has cooled, a vacuum cleaner with brush
attachment may be used to remove dust and lint from exterior
surfaces of the heater including the grille openings.

2. With a damp cloth, wipe dust and lint from grille and exterior
surfaces.

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 the removal of the grille and, as necessary
the heater from the backbox to clean residue from the unit. After
completing the cleaning and servicing, the heater should be fully
reassembled and checked for proper operation.

DO NOT TAMPER WITH OR BYPASS ANY SAFETY LIMITS
INSIDE HEATER.

4

All products manufactured by Marley Engineered Products are warranted against defects in workmanship and materials for one year from date of installation, except

LIMITED WARRANTY

heating elements which 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 OBTAIN WARRANTY SERVICE AND
WARRANTY PARTS PLUS GENERAL INFORMATION

1. Warranty Service or Parts 1-800-642-4328

2. Purchase Replacement Parts 1-800-654-3545

3. General Product Information www.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

Notes/Notas/Notes

6