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HUHAA Series 

Modular Unit Heaters 

Read Carefully - These instructions are written to help you
prevent difficulties that might arise during installation of
heaters.  Studying the instructions first may save you 
considerable time and money later.  Observe the following
procedures, and cut your installation time to a minimum.

1.

To prevent electrical shock, disconnect all power coming to heater

at main service panel before wiring or servicing.

2.

All  wiring  must  be  in  accordance  with  the  National  and    Local

Electrical Codes and the heater must be grounded as a precaution

against possible electric shock.

3.

Verify  the  power  supply  voltage  coming  to  heater  matches  the 

ratings printed on the heater nameplate before energizing.

4.

This heater is hot when in use. To avoid burns, do not let bare skin

touch hot surfaces.

5.

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

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

age to the heater.

6.

To prevent a possible fire, do not block air intakes or exhaust in any

manner. Keep combustible materials, such as crates, 

d r a p e s ,

etc.,  away  from  heater.  Do  not  install  behind  door,  furniture, 

towels, or boxes.

7.

A heater has hot and arcing or sparking parts inside. Do not use it

in areas where gasoline, paint or flammable liquids are stored.

8.

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.

9.

This heater is not approved for use in corrosive atmospheres such

as marine, green house or chemical storage areas.

SAVE THESE INSTRUCTIONS

!

Dear Owner,

Congratulations!    Thank  you  for  purchasing  this  new  heater  manufactured  by  Marley  Engineered  Products.   
You  have  made  a  wise  investment  selecting  the  highest  quality  product  in  the  heating  industry.   
Please carefully read the installation and maintenance instructions shown in this manual.  You should enjoy
years of efficient heating comfort with this product from Marley Engineered Products... the industry’s leader in
design, manufacturing, quality and service.

... The Employees of
Marley Engineered Products

Installation, Operation & Maintenance Instructions

WARNING

 

FILE #E21609

Summary of Contents for HUHAA series

Page 1: ...fire do not block air intakes or exhaust in any manner Keep combustible materials such as crates d r a p e s etc away from heater Do not install behind door furniture towels or boxes 7 A heater has hot and arcing or sparking parts inside Do not use it in areas where gasoline paint or flammable liquids are stored 8 Use this heater only as described in this manual Any other use not recommended by th...

Page 2: ...all and ceiling clearances before mounting heater The heater may be mounted for either vertical or horizontal dis charge by the use of threaded rods Refer to Table 2 for thread ed rod sizes required Observe the detailed procedures in the following installation instructions The heater may also be suspended from the wall or ceiling by means of an optional mounting bracket type HUHAAB or HCMB which p...

Page 3: ...hese units are factory wired for single phase operation If these heaters are for use with three phased power recon nect the wires as indicated in the wiring diagram attached to the heater Additional information can be found by looking at the wiring illustrations in Figures 3a and 3b and following the directions shown below On models HUHAA520 HUHAA524 HUHAA720 HUHAA724 HUHAA1020 and HUHAA1024 Figur...

Page 4: ...OVERY AT OR REMOTE H HUHAARFS2 REMOTE SUMMER FAN SWITCH HUHAARFS 1 OR SUMMER FAN SWITCH HUHAAFS MANUAL HUHAA MT 2 HUHAA MT 1 HUHAA MT 2 Figure 4 Control Terminal Board for Heaters Without Contactors NOTES 1 THIS STYLE CONTROL TERMINAL BOARD USED WITH MODELS HUHAA320 HUHAA324 HUHAA327 HUHAA520 HUHAA524 HUHAA527 2 WHEN UNIT IS WIRED FOR SINGLE PHASE JUMPER H1 TO H2 IF SINGLE POLE THER MOSTAT IS USED...

Page 5: ...27 2 HUHAA2024 60 27 2 HUHAA2048 60 27 2 HUHAA2524 93 42 3 HUHAA2548 30 26 5 8 13 3 4 93 42 3 HUHAA3020 76 2 676 4 346 8 93 42 3 HUHAA3024 93 42 3 HUHAA3048 93 42 3 HUHAA4024 119 54 0 HUHAA4048 30 26 5 8 18 1 8 119 54 0 HUHAA5020 76 2 676 4 457 2 119 54 0 HUHAA5024 119 54 0 HUHAA5048 119 54 0 MODEL NO HUHAA324 DATE CODE 0395 MFG NO VOLTS AC KILOWATTS PHASE 60 HZ 208 240 2 2 3 1 MOTOR CONTROL VAC A...

Page 6: ... 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 UPO...

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