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FUH Series 

Unit Heater

WHEN USING ELECTRIC APPLIANCES, BASIC PRECAU-
TIONS SHOULD ALWAYS BE FOLLOWED TO REDUCE THE
RISK OF FIRE, ELECTRIC SHOCK, AND INJURY TO PER-
SONS, 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 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

Summary of Contents for FUH series

Page 1: ...cked 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...

Page 2: ...des 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 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 4 CAUTION High temperature risk of fire keep electrical cords drapery furnishings ...

Page 3: ...ating 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 chang...

Page 4: ...urned 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 th...

Page 5: ...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 in...

Page 6: ... 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 S...

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