Fahrenheat FUH series Guide

FUH Series
Unit Heater
WHEN USIN ELECTRIC APPLIANCES, BASIC PRECAU-
TIONS SHOULD ALWAYS BE FOLLOWED TO REDUCE THE
RISK OF FIRE, ELECTRIC SHOCK, AND INJURY TO PER-
SONS, INCLUDIN THE FOLLOWIN :
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 rep-
utable 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 provided with a red alarm light that will illumi-
nate only if the heater has turned off as a result of over-
heating. If you see the light on, immediately turn the heater
off and inspect for any objects on or adjacent to the heater
that may have blocked the airflow or otherwise caused high
temperatures to have occurred. DO NOT OPERATE THE
HEATER WITH THE ALARM LIGHT ILLUMINATING.
12. 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.
13. When installing, see INSTALLATION INSTRUCTIONS for
additional warnings and precautions.
14. For safe and efficient operation, and to extend the life of your
heater, keep your heater clean - See MAINTENANCE
INSTRUCTIONS.
SAVE THESE INSTRUCTIONS
!
Installation, Operation & Maintenance Instructions
WARNING
IMPORTANT INSTRUCTIONS
PPD 30173 06/13 5200-11195-000 (ISS 1.0)
Mounting Height, ft. (mm) Min. Distance from
BTU per Contactor Vertical Installation Horizontal Installation Horizontal Air Mounting Hole to
Heater Rating and Voltage Hr. Phase Built-in Min. Max. Min. Max. Throw, ft. (mm) Wall, in (mm)
*5000 W @ 240V 17,065
4165W @ 240V 14,215 1 No 6’ 11’ 6’ 8’ 18’ **13”
3332W @ 240V 11,365 (1829) (3353) (1829) (2438) (5472) (330)
2500W @ 240V 8,533
*3750W @ 208V 12,799
3123W @ 208V 10,659 1 No 6’ 11’ 6’ 8’ 18’ **13”
2500W @ 208V 8,533 (1829) (3353) (1829) (2438) (5472) (330)
1874W @ 208V 6,396
Specifications
FUH 54C
Mounting Height, ft. (mm) Min. Distance from
BTU per Contactor Vertical Installation Horizontal Installation Horizontal Air Mounting Hole to
Heater Rating and Voltage Hr. Phase Built-in Min. Max. Min. Max. Throw, ft. (mm) Wall, in (mm)
*7500 W @ 240V 25,598
6250W @ 240V 21,331 1 No 6’ 11’ 6’ 8’ 18’ **13”
5000W @ 240V 17,065 (1829) (3353) (1829) (2438) (5472) (330)
3750W @ 240V 12,799
*5625W @ 208V 19,198
4685W @ 208V 15,990 1 No 6’ 11’ 6’ 8’ 18’ **13”
3750W @ 208V 12,799 (1829) (3353) (1829) (2438) (5472) (330)
2812W @ 208V 9,598
*Heater is shipped from factory wired for these wattages. Heater can be field adjusted to the other wattages (Refer to Table 2
“Adjusting the Heat Output”.)
**48" (1219 mm) when heater air flow is between 45° downward and vertical.
FUH 724A

INSTALLATION
INSTRUCTIONS
Unpacking Your New Heater
Remove the heater from the box and inspect it for any damage.
If it appears to be damaged, immediately return it to the store
from which you purchased it.
Tools Needed
You will need the following tools to install your FUH Series
electric heater:
• Screwdriver • Needle nose pliers • Pliers
• Electric Drill and 1/4" (6.35 mm) bit •Adjustable wrench
Hardware Needed
You will also need the following hardware for installation:
• Enough 10 ga. min. insulated copper conductor (with ground)
wire to run power from the breaker/ fuse to the heater. Only
use copper wire rated at least 75° C. Do not use aluminum
wire with this unit.
• Proper size fuses and circuit breakers in accordance with the
National Electrical Code. Also see Table 2 Heat Output
Adjustments
• Screw wood, 3/8" x 2" (9.5 mm x 50 mm) Lag bolts (Qty. 1 or 2).
• Washer, 3/8" (9.7 mm) (Qty. 2)
• Wire connectors sized to your application.
NOTE: For certain applications, conduit may be required (see
Figure 2). Check local electrical codes. If wiring is run in conduit,
be sure there is enough flexible conduit to allow the heater to be
turned if necessary.
Locating the Heater
The heater should be installed out of traffic areas and at least 6'
off the floor. The direction of air flow should not be restricted (ie:
by columns or machinery) and the air flow should wipe exposed
walls, rather than blowing directly at them. When more than one
heater is used in an area, the heaters should be arranged so
that the air discharge of each heater supports the air flow of the
others to provide best circulation of warm air, as indicated in
Figure 3, below.
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 accor-
dance with the National and Local Codes having jurisdic-
tion and the heater must be grounded.
3. Verify the power supply voltage coming to heater matches
the ratings as shown on the heater nameplate.
CAUTION: ENER IZIN HEATER AT A VOLTA E REATER
THAN THE VOLTA E PRINTED ON THE NAMEPLATE WILL
DAMA E THE HEATER AND VOID THE WARRANTY AND
COULD CAUSE A FIRE.
4. 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, 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 fab-
rics and plastics.
5. To reduce the risk of fire, do not store or use gasoline or
other flammable vapors and liquids in the vicinity of the
heater.
6. When heater is to be wall or ceiling mounted, the anchoring
provisions must be of sufficient strength to support the total
weight of the heater plus the weight of the mounting provi-
sions. Failure to properly secure the supporting members
of the building structure could allow the heater to fall.
7. The following minimum clearances must be maintained:
For Vertical Airflow, Bottom of Heater to Floor:
6’ (1829 mm) minimum, 11’(3353 mm) maximum
Horizontal Aiflow, Bottom of Heater to Floor:
6’ (1829 mm) minimum, 8’(2438 mm) maximum
Sides of heater to adjacent wall :
Airflow from Horizontal to 45° downward: 13” (330 mm) -
Airflow from 45° downward to straight down 48”
(1219 mm).
Discharge to any object: 36” (915 mm) minimum
8. Do not use this heater for dry out as the paint, plaster, saw-
dust and drywall sanding dust will permanently damage the
heater and must be kept out of the heater.
2
Figure 2 - Connectors, cable, and hardware used to wire
the UH-524TA
Conduit Conduit
Connector
Flexible Conduit Flexible Conduit Connector
Flexible NM Cable Flexible NM Cable Connector
12
12
34
Figure 3
SIDE VIEW
MOUNTING
LOCATION
MINIMUM
DISTANCE
TO WALL
61/2in.
(165 mm)
1/2in., 3/4in. (2)
(12.7 mm, 19.1 mm)
13/4in.
(44.5mm)
14 in. (356 mm)
121/2in.
(318 mm)
FRONT VIEW
13 in.
(330.2 mm)
125/8in.
(321 mm)
Figure 1 - Dimension Data

Mounting
1. Remove the mounting bracket from the heating unit by loos-
ening the bracket screws with a wrench and slipping the han-
dle off over the screw heads.
2. Locate a stud in the ceiling and attach the mounting bracket
to the ceiling joist as shown in Figures 4-A or 4-B. Place a
washer on the screw between the bracket and the ceiling to
act as a spacer and screw them into the stud. Tighten the
screws enough to securely hold the heating unit with the air
flow pointed in the proper direction.
3. Lift the heater up and into the mounting bracket. Align the
screws on each side of the heater with the keyhole slots in
the mounting brackets. If the heater is to be tilted, it must be
positioned in the lower keyhole slots (see Figure 5). Tighten
the bracket screws so the unit is securely suspended at the
desired position.
Wiring
1. To connect the power to the heater, simply remove the screw
from the front of the unit. This allows the hinged bottom to
open, providing access to the electrical wiring and connec-
tors. (See Figure 5)
2. Attach the cable connectors to the unit (See Figure 2) and
slide the 10 gauge wire through the cable connector. Pull
enough wire through the connector to work with when mak-
ing the the connections.
NOTE: Wiring compartment volume: 370 in3(6063 cm3)
3. Connect the wire to the power terminal block located in the
base of the heater (See Figure 6).
NOTE: Unit is 240/208 volts. When wiring a two conductor cable
with ground the white wire must be marked black by adding a piece
of black electrical tape to the wire near the point of connection.
NOTE: To decrease the heat output of the heating unit, see
Adjust the Heat Output, Table 2 and Wiring Diagrams Figure 7.
Adjusting the Heat Output
Heat output can be increased or decreased by switching wires at
the wattage change terminal board. The heater is factory wired
to deliver a heat output of 17,065 BTU per hour. Should your par-
ticular application require less heat output, refer to Table 2
below and change the wires at the wattage change terminal
board as shown in Wiring Diagram Figure 7A or 7B.
TO PREVENT POSSIBLE ELECTRIC SHOCK, DISCONNECT
POWER TO THE HEATER AT THE MAIN SERVICE BOX
BEFORE ATTEMPTIN TO ADJUST THE HEAT OUTPUT OF
THIS UNIT.
3
CEILING JOIST
WASHER
3/8" DIAGONAL
LAG BOLT
BRACKET
CEILING JOIST
WASHER
3/8" DIAGONAL
LAG BOLT
BRACKET
Figure 4-A
Figure 4-B
Single-Screw Mounting
Double-Screw Mounting
Figure 5 REMOVE SCREW TO OPEN DOOR
USE BOTTOM KEYHO E
S OTS IF HEATER IS
TO BE TI TED DOWN
GREEN
(or BareCopper)
WHITE
BLACK
L1
L2
BOTTOM
VIEW
POWER
TERMINAL
BLOCK
Figure 6
Table 2 - Heat Output Adjustments FUH54C
MAX
FUSE HEATER MOVE JUMPERS FROM
BTU/HR VOLTS WATTS SIZE AMPS C-D TO A-B
17065 240 5000 30 20.9 NONE
14215 240 4165 25 17.4 B UE
11365 240 3332 20 13.9 B UE & YE OW
8533 240 2500 15 10.4 B UE, YE OW & RED
12799 208 3750 25 18.0 NONE
10659 208 3123 20 15.0 B UE
8533 208 2500 15 12.0 B UE & YE OW
6396 208 1874 15 9.0 B UE, YE OW & RED
*
*NOTE: 240/208 volts. When wiring with a two conductor cable
with ground, the white wire must be marked black.
FUH724A
MAX
FUSE HEATER MOVE JUMPERS FROM
BTU/HR VOLTS WATTS SIZE AMPS C-D TO A-B
25,598 240 7,500 45 31.3 NONE
21,331 240 6,250 35 26.1 B UE
17,065 240 5,000 30 20.9 B UE & YE OW
12,799 240 3,750 20 15.7 B UE, YE OW & RED
19,198 208 5,625 40 27.1 NONE
15,990 208 4,685 30 22.3 B UE
12,799 208 3,750 25 18.1 B UE & YE OW
9,598 208 2,812 20 13.6 B UE, YE OW & RED

OPERATING
INSTRUCTIONS
1. Heater must be properly installed before operation.
2. After heater is completely assembled, rotate thermostat knob
counterclockwise until control stops. This is the minimum
heat setting.
3. Turn power supply to heater “ON” at main switch panel.
4. Heater should not operate. If it operates disconnect power
and recheck wiring.
5. Rotate thermostat clockwise until it stops (maximum heat set-
ting).
6. Heater should turn on after a brief delay (see Automatic Fan
Delay below). If heater and fan do not come on, disconnect
power and check wiring.
NOTE: The first time you operate the unit, it may smoke slightly.
This is due to the residual cleaning agents used to clean the ele-
ment when the heater is manufactured. This is normal and does
not indicate a problem with the unit. This condition will stop after
the heater has been in operation for a few minutes.
7. Allow heater to continue to operate until room temperature
reaches desired comfort level. Then rotate thermostat knob
counterclockwise slowly until thermostat clicks off. (Note that
the fan delay will keep the fan running until the elements
cool.) Heater will cycle on and off to maintain room tempera-
ture.
8. It may be necessary to readjust thermostat a time or so until
exact comfort level is attained. Rotation in the clockwise
direction will increase the amount of time the heater will pro-
duce heat. Rotation in the counterclockwise direction will
reduce the amount of time the heater is on.
Automatic Fan Delay: The FUH Series has an automatic fan
delay. When the thermostat calls for heat, fan action is delayed
momentarily until the heating elements warm. This prevents the
circulation of cold air. When the heater raises the temperature of
the room to the thermostat set point, the heating element is
turned off but the fan will continue to run until the heating ele-
ment cools down. This prevents exposing the unit to residual
heat, provides a higher comfort level and prolonged element life.
Automatic Thermal Limit: FUH Series is equipped with a
thermal limit which will automatically shut off the heater in the
event of overheating. Should the thermal limit activate an alarm
light will be visible on the front of the heater next to the thermo-
stat knob. The heater will turn on when the operating tempera-
ture returns to normal. Should the unit overheat and activate the
thermal limit, the cause of the overheating should be determined
before further operation.
NOTE: If the unit is installed in an area where the temperature is
below 50° F, the fan may cycle on and off until the temperature
in the room rises above 50° F, this is normal and does not indi-
cate a problem with the unit. As soon as the heater warms the
air in the room above 50°, the fan will operate continually until
the thermostat has reached the room set point.
Adjusting Air Flow Direction
You can adjust the direction of air flow by:
1. Turning the unit. If the unit has been installed with a single
lag bolt, as shown in Figure 8, simply turn the entire unit as
needed to adjust air flow.
DO NOT TAMPER WITH OR BYPASS ANY SAFETY LIMITS
INSIDE HEATER.
CAUTION - DO NOT CONTINUE TO ATTEMPT TO USE THE
HEATER IF THE THERMAL LIMIT REPEATEDLY OPERATES.
TO DO SO COULD PERMANENTLY DAMA E THE HEATER
OR CREATE A FIRE OR SAFETY HAZARD.
4
Figure 8
GND
4
6
5
2
3
1
MOTOR
FAN
2
1
11
12
9
10
8
7
L1 L2
DCBA
ELEMENT
FAN
CONTROL
HI LIMIT
FIELD WIRING
POWER
TERMINAL
BLOCK
THERMOSTAT
WATTAGE CHANGE
TERMINAL BOARD
RED
YEL
BLU BLK
T3 T2 T1
CONTACTOR
L3
2
L2
1
L1
ALARM LIGHT
Figure 7B - Wiring Diagram FUH724A
BLK
1
2
3
4
5
6
ELEMENT
HI
LIMIT
FAN
CONT.
7
8
9
10
11
12
C D A B
WATTAGE CHANGE
TERMINAL BOARD
GROUND
THERMOSTAT
L1 L2
POWER
TERMINAL
BLOCK
FIELD
WIRING
FAN
ALARM LIGHT MOTOR
RD
YL
BLU
Figure 7A - Wiring Diagram FUH54C

2. Tilting the unit. Loosen the bracket screws, tilt the heater to
the desired position, and re-tighten the bracket screws (see
Figure 4).
NOTE: To tilt the heater it must be mounted in bottom key hole
slots of mounting bracket to maintain adequate clearance and
prevent possible overheating.
3. Adjusting the louvers to the desired position.
NOTE: The louvers are designed so they can not be completely
closed. Do not attempt to defeat this feature, damage to the unit
can result.
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.
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 operat-
ing 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.
After completing the cleaning and servicing, the heater should
be checked for proper 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.
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 operat-
ing 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.
After completing the cleaning and servicing, the heater should
be checked for proper operation.
ALL SERVICIN BEYOND SIMPLE CLEANIN THAT
REQUIRES DISASSEMBLY SHOULD BE PERFORMED BY
QUALIFIED SERVICE PERSONNEL.
TO REDUCE RISK OF FIRE AND ELECTRIC SHOCK OR
INJURY, DISCONNECT ALL POWER COMIN TO HEATER
AT MAIN SERVICE PANEL AND CHECK THAT THE ELEMENT
IS COOL BEFORE SERVICIN OR PERFORMIN
MAINTENANCE.
ALL SERVICIN BEYOND SIMPLE CLEANIN THAT
REQUIRES DISASSEMBLY SHOULD BE PERFORMED BY
QUALIFIED SERVICE PERSONNEL.
TO REDUCE RISK OF FIRE AND ELECTRIC SHOCK OR
INJURY, DISCONNECT ALL POWER COMIN TO HEATER
AT MAIN SERVICE PANEL AND CHECK THAT THE ELEMENT
IS COOL BEFORE SERVICIN OR PERFORMIN
MAINTENANCE.
5

LIMITED WARRANTY
All products manufactured by Marley Engineered Products are warranted against defects in workmanship and materials for one year from date of installation, except
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
A REEMENT. MARLEY EN INEERED PRODUCTS SHALL NOT BE LIABLE FOR CONSEQUENTIAL DAMA ES ARISIN WITH RESPECT TO THE
PRODUCT, WHETHER BASED UPON NE LI ENCE, 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 fac-
tory 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. eneral 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