Trane UHAA-15 Owner's manual

SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing
of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and
training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or
serious injury. When working on the equipment, observe all precautions in the literature and on the tags,
stickers, and labels that are attached to the equipment.
Electric Architectural Forced-Air Wall Heater
Installation, Operation,
and Maintenance
UHAA-15 (1500 Watts UHAA-04 (4000 Watts)
UHAA-02 (2000 Watts) UHAA-48 (4800 Watts)
UHAA-03 (3000 Watts)
UHAA-IOM-1E
November 2015

© 2015Trane All rights reserved UHAA-IOM-1E
Introduction
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required.Your personal safety and the proper
operation of this machine depend upon the strict observance of these precautions.
The three types of advisories are defined as follows:
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTIONsIndicates a potentially hazardous situation which, if not avoided, could result in
minor or moderate injury. It could also be used to alert against unsafe practices.
NOTICE Indicates a situation that could result in equipment or property-damage only
accidents.
WARNING
Proper Field Wiring and Grounding Required!
Failure to follow code could result in death or serious injury. All field wiring MUST be
performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE
and ELECTROCUTION hazards.To avoid these hazards, you MUST follow requirements for field
wiring installation and grounding as described in NEC and your local/state electrical codes.
Failure to follow code could result in death or serious injury.
WARNING
Personal Protective Equipment (PPE) Required!
Installing/servicing this unit could result in exposure to electrical, mechanical and chemical
hazards.
• Before installing/servicing this unit, technicians MUST put on all PPE required for the work
being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard
hat/bump cap, fall protection, electrical PPE and arc flash clothing). ALWAYS refer to
appropriate Material Safety Data Sheets (MSDS)/Safety Data Sheets (SDS) and OSHA
guidelines for proper PPE.
• When working with or around hazardous chemicals,ALWAYS refer to the appropriate MSDS/
SDS and OSHA/GHS (Global Harmonized System of Classification and Labelling of
Chemicals) guidelines for information on allowable personal exposure levels, proper
respiratory protection and handling instructions.
• If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE
in accordance with OSHA, NFPA 70E, or other country-specific requirements for arc flash
protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING,
DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC
FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.
Failure to follow instructions could result in death or serious injury.

UHAA-IOM-1E 3
Introduction
Copyright
This document and the information in it are the property ofTrane, and may not be used or
reproduced in whole or in part without written permission.Trane reserves the right to revise this
publication at any time, and to make changes to its content without obligation to notify any person
of such revision or change.
Trademarks
All trademarks referenced in this document are the trademarks of their respective owners.
Revision History
• UHAA-IOM-1(September1990)
Original issue of manual, specifically intended for use by experienced service technicians. Provides
installation procedures and operating instructions for "A" design sequence UHAA Electric
Architectural Forced-Air Wall Heaters.
• UHAA-IOM-1A(April 1993) Metric dimensions added
• UHAA-IOM-1 B (May 1993) U. L. changes added to wiring diagram. Heater employs a visual
alarm light to warn that parts of the heater are getting excessively hot.
• UHAA-IOM-1C (July 1994) Minor change in introduction.
• UHAA-IOM-10(April1997) Modified for Canadian use.
• UHAA-IOM-1E (Nov. 2015) U.L. standard update added page 6 for disconnect switch lockout
instructions and revised Figure 7 wiring designations for Day/Night Relay.

4 UHAA-IOM-1E
Table of Contents
Model Number Codes ..............................................5
Important Precautions ..............................................6
Installation Instructions .............................................7
Locating the Heater .............................................. 7
Before Mounting ................................................ 8
Mounting Instructions ............................................ 8
Wiring Instructions .............................................. 9
Wiring Schematics ................................................10
Operation and Maintenance ........................................12
Pre-Start Procedures ............................................ 12
Operating Instructions .......................................... 12
Maintenance Instructions ........................................ 13

UHAA-IOM-1E 5
Model Number Codes
All standardTrane products are identified by a multiple character model number that precisely
identifies each unit. An explanation of the alphanumeric identification code used for UHAA units
is provided below. Use of the unit model number will enable the owner/operator, installing
contractors, and service technicians to define the installation, components and options for any
specific unit.
Important: Be sure to refer to the model number stamped on the unit name plate label when
ordering replacement parts or requesting service.
The following sample model number demonstrates the use of the listed codes:
Model Number: UHAA151ATADR
Digit Number 1 2 3 4 5 6789101112
Digits 1,2,3
ProductDescription
UHA = Electrical Architectural
Forced Air Wall Heater - Series
3320
Digit4
Development Sequence
A = First Generation
Digit 5,6
Unit Capacity
15 = 1500 Watts
02 = 2000 Watts
03 = 3000 Watts
04 = 4000 Watts
48 = 4800 Watts
Digit 7
Element Phase
1 = Single-Phase
Digit8
Element and Motor Voltage
A= 208 Volts
B = 240 Volts
C = 277 Volts
E = 120 Volts
Digit 9
Thermostat
T = Built-InThermostat
Digit 10
Design Sequence
A = First Design Sequence
Digit 11
Disconnect Type
D = Built-In Disconnect Switch
Digit 12
Relay (Optional)
R = Built-In Day/Night Relay

6 UHAA-IOM-1E
Important Precautions
Important Precautions
When using electrical appliances, basic precautions should always be followed to reduce the risk
of fire, electrical shock, and injury to persons, including the following:
• Read all instructions before using this heater.
• Keep cords and all other combustible material, such as furniture, papers, clothes and curtains
away from the heater. For safe and efficient operation, keep an open space around heater of
three feet in front and 12 inches at ends and rear.
• Extreme caution is necessary when any heater is used by or near children or invalids and
whenever the heater is left operating and unattended.
• Do not operate any heater after it malfunctions, has been dropped or damaged in any manner.
Return heater to authorized service facility for examination, electrical or mechanical
adjustment, or repair.
• Do not use outdoors.
• To disconnect the heater, turn controls to off, and turn off power to heater circuit at main
disconnect panel (or operate internal disconnect switch if provided).
• Do not insert or allow foreign objects to enter any ventilation or exhaust opening as this may
cause an electric shock.
• To prevent a possible fire, do not block air intakes or exhaust in any manner.
• Be aware that the heater has hot and arcing or sparking parts inside.
• WARNING: Do not use it in area where gasoline, paint, or flammable liquids are used or stored.
• 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.
• This heater may include an audible or visual alarm to warn that parts of the heater are getting
excessively hot.
• If the alarm sounds (or illuminates), 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 occur.
• DO NOT OPERATETHE HEATER WITHTHE ALARM SOUNDING (OR ILLUMINATING).
• SAVE THESE INSTRUCTIONS.
• Switch Lockout
WARNING
Safety Instructions!
Failure to follow safety precautions in this section could result in death, serious injury, and
property damage.
Note: Front grille must remain off during lockout
for switch lockout hasp or padlock
through bracket as shown here.

UHAA-IOM-1E 7
Installation Instructions
Installation Instructions
Locating the Heater
Heater is designed to be mounted on the wall near the ceiling or floor, with airflow directed
downward. Minimum mounting height for the heater is 8" (203.2mm) above a finished floor (see
Figure 1).
1. Use 3320EX33 for surface mounting.
2. Observe the proper clearances:
Figure 1. Architectural Wall Heater Clearance
WARNING
Fire Hazard!
Failure to follow instructions below could result in death or serious injury.
CAUTION
Avoid Heater Malfunction!
Do not allow curtains, furniture, or other objects to obstruct the front grille of the heater since
proper heater operation requires a free flow of intake and exhaust air.

8 UHAA-IOM-1E
Installation Instructions
Before Mounting
1. Insure that supply voltage matches voltage rating on heater label.
2. Turn off electrical power to heater circuit.
Mounting Instructions
You can either flush-mount or surface-mount the heater by performing the following steps:
1. Disassemble heater by removing seven screws shown as "C" in Figure 2 and 3.
2. Complete one of the following sequences according to Figure 2 or
To Flush-Mount Heater:
1. Place wall box "A" between studs at desired height
2. Secure to studs through holes "M" in box.
The flanges on the wall box must rest on the surface of the finished wall. Be sure to allow for
wall thickness.
Figure 2. Flush-Mounting Heater Into Wall
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.

UHAA-IOM-1E 9
Installation Instructions
To Surface-Mount Heater:
1. Secure wall box "A" to wall at desired height through holes "X" in box.
2. Place surface adapter "E" over wall box.
3. Bring electrical service in through bottom knockout "K" for surface mounting only.
Figure 3. Surface-Mounting Heater on a Wall
Wiring Instructions
Typical UHAA unit wiring diagrams are provided in figures 4 through 7. Heater electrical data is
provided inTable 1. All wiring must comply with NEC, CEC, and local codes.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of conductors. Failure to use copper
conductors could result in equipment damage.

10 UHAA-IOM-1E
Wiring Schematics
1. Bring service leads in through knockouts "K" (Figures 2 and 3) on top or bottom of wall box for
flush-mounting the heater. Bring service leads in through bottom knockouts "K" only for
surface-mounting the heater. When bringing wiring in from the bottom, install wires through
cover "G" by removing screw "H".
2. Connect service leads to two black leads on 208V/240V models; connect to black and white leads
on 120V/277V models. Connect ground lead to green wire with approved connectors.
3. Attach wiring compartment cover "D" to heater assembly with screw "C". Refer to Figure 2 and 3.
Junction box volume = 52 CI (1321 mm)
Wiring Schematics
Figure 4. Standard UHAA Unit
Table 1. UHAA Unit Electrical Data
Model
Number Watts Btu/Hr. Output
UHAA-15 1,500 5,119
UHAA-02 2,000 6,825
UHAA-03 3,000 10,250
UHAA-04 4,000 13,650
UHAA-48 4800 16,380