Trane Electric Unit Heaters Catalogue UH PRC003 EN

2015-04-02

: Trane Trane-Electric-Unit-Heaters-Catalogue-684289 trane-electric-unit-heaters-catalogue-684289 trane pdf

Open the PDF directly: View PDF .
Page Count: 48

Electric Unit Heaters

UH-PRC003-ENAugust 2005

Model UHEC

Model UHXA

Model UHWA

Model UHAA

Model UHRA

Model UHCA

Introduction

Electric unit heaters have been a traditional means of heating hard-to-warm spaces for many years. Their uncomplicated

approach in auxiliary heating make them easy to install and maintain. Their versatile characteristics allow Trane’s

electric unit heaters to fill nearly every heating application gap, while their structural integrity makes them a reliable

heat source to blend into today’s building décor.

Trane’s electric unit heaters are available in 6 variations. The following chart presents a brief overview of the different

electric unit heater models Trane offers.

Horizontal and Vertical Spot

Heating Electric Unit Heater

Applied as an auxiliary heat source

in walkways, stairways, vestibules,

and entrances. The horizontal and

vertical spot heater may be used in

commercial, industrial and

institutional applications.

Hose-Down, Corrosion-Resistant

Electric Unit Heater

Used in industrial applications where

dirt or dust may be extensive. The

totally enclosed, watertight casing is

corrosion-resistant for non-hazardous

locations.

UHXA 3 to 25 kW Explosion-Proof Electric Unit Heater Designed for hazardous locations, the

UHXA model may be applied where

flammable gases, vapors, powdered

metals or dust may be present.

Commercial, Ceiling-Mounted

Electric Unit Heater

The surface- or recessed mounted

model may be applied in restricted

areas or where wall space is limited.

This may included vestibules, lobbies,

rest rooms, small-offices or guard

buildings.

UHRA 3 to 48 kW

UHWA 2 to 5 kW Heavy Duty, Wall Mounted

Electric Unit Heater

Series 20 and 50

Suited for public buildings such as

schools, stores, offices, dormitories,

hospitals and transportation

terminals.

UHAA 1.5 to 4.8 kW Architectural Wall Mounted

Electric Unit Heater

The rugged construction and

attractive design of the UHAA model

make them appropriate for offices,

lobbies, and reception areas for

schools and dormitories.

Model Description Application

UHCA 2 to 5 kW

UHEC 3 to 50 kW

Contents

UH-PRC003-EN

Introduction

Features and Benefits

Application Considerations

Selection Procedure

Model Number

General Data

Control Wiring

Dimensional Data

Options

Mechanical Specifications

UH-PRC003-EN4

Features and

Benefits Model UHEC

Electric Unit Heaters

•Thirty-seven models to choose from

ranging from 3.3 to 50 kW. Available for

208, 240/208, 277 or 480-volt operation.

•One unit can be used for either

horizontal or vertical discharge.

•Specially designed inlet louvers, venturi

and outlet diffuser provide uniform air

temperature and throw characteristics.

•Single-phase units, easily converted to

three-phase power, are available in 3.3

to 10 kW for 208 and 240-volt

operation.

•Two-speed fan operation standard on

25 kW units and above.

•Meets all requirements of UL listing

standard 1278 when installed as

directed.

UHEC electric unit heaters are ideal for

applications ranging from new

construction to auxiliary heat to

renovation. They are available in 37

models ranging from 3.3 kW to 50 kW. In

addition to a wide capacity range, each

compact, attractive unit can be mounted

in either a horizontal or vertical discharge

arrangement.

Flexibility

The Trane electric unit heater shows its

flexibility in installation and operation.

Intended for industrial, commercial or

institutional use, the Trane electric unit

heater is available for 208 to 480-volt,

single or three-phase operation. Units

from 3.3 to 10 kW for 208 and 240-volt

operation may be converted easily from

single to three-phase operation in the

field. Two-speed fan operation on 25 kW

units and above provides greater airflow

flexibility.

Uniform Air Distribution

The Trane unit heater uniformly directs

the air to exactly where it’s needed. A

specially designed deep-drawn venturi

assures uniform air distribution. The

outward-drawn venturi channels the air

forward for maximum, uniform air throw.

Outlet diffusers are provided to properly

direct the heated discharge air.

In order to minimize the potential for hot

spots on the heating coil, inlet louvers

evenly distribute intake air over the entire

heating element.

Trane electric unit heaters are designed

with totally enclosed, permanently

lubricated industrial motors. The

air-over-motor design reduces operating

temperatures, promoting long motor life.

Thermal overloads provide additional

protection for major circuits, in case

normal operating temperatures are

exceeded.

Quick and Easy

Low-Cost Installation

Installation time and costs are minimized.

Compact and completely factory wired,

the Trane electric unit heater requires

only a single-source power supply

connection. The units are available with

factory installed 24-volt control

transformers and contactors.

Terminal Panel — Single-point terminal

board wiring for easy control accessories

installation.

Casing — Die-formed heavy-gauge steel

with baked enamel finish.

Outlet Louvers — Individually adjustable

from 30° up to 45° down.

Motor and Fan — Totally enclosed,

permanently lubricated, sealed bearing,

all-angle motor and fan combination

through 20 kW and two-speed permanent

capacitor-type motor on 25 through 50

kW units.

Contactors — All units 25 kW and larger

are equipped with two contactors and

two element banks for either single or

two-stage heating operation.

Fusing — Element, motor and transformer

primary fusing are factory installed and

wired where required to NEC. Branch

circuit fusing installed where required on

48 amps and up.

Intake Louvers — Designed to provide

uniform air distribution across entire

heating element.

Element — High mass, all steel finned,

tubular heating element.

Transformer — 24-volt control circuit for

closer temperature control and added

safety. Standard on most models,

optional on 3.0 and 5 kW 208, 240/208,

277-volt models.

Thermal Overloads — Automatic reset

thermal cutouts disconnect motor and

element in the event normal operating

temperatures are exceeded.

Access Panel — Full width access panel

secured by quarter-turn fasteners.

LISTED

5UH-PRC003-EN

Features and

Benefits Model UHEC

Mounting the unit is easily accomplished

with the use of hanger rods connected to

weld nuts on the unit casing. An

accessory mounting bracket is available

for single-point mounting. Field installed

accessories such as built-in thermostats,

disconnect switches and summer fan

switches are provided with spade

terminals for easy installation to a single-

point terminal board.

Reliable Operation

Trane electric UHEC unit heaters operate

reliably when installed and operated as

directed. In addition to meeting all

requirements of UL listing standard 1025,

the heating element is backed with a five-

year warranty.

Easy Access

In the event that service is required, easy

access to the control components is

provided with a full-length access panel

secured by quarter-turn fasteners. For

added convenience, unit wiring diagrams

are located inside the access panel for

easy reference during installation and

servicing.

Horizontal Discharge

Vertical Discharge

UH-PRC003-EN6

Features and

Benefits Model UHRA

Hose-Down Electric Unit Heaters

Trane UHRA hose-down electric unit

heaters are constructed for use in areas

that require washing or hosing of

equipment due to a dirty or dusty

industrial environment in

non- hazardous locations. The

totally enclosed, watertight casing made

with corrosion-resistant material, makes

the unit ideal for industrial heating

applications. All controls are built-in and

the safety temperature controls are

wired in a nonmetallic NEMA 4x control

panel with single-point power

connections.

Standard Features

•Heavy-duty 304 stainless steel casing

•NEMA 4x nonmetallic control panel

•24-volt transformer and control circuit

•Three-position switch (off - heat - fan)

•Disconnect switch with enclosure

interlock

•Capillary thermostat with stainless steel

sensor

•Automatic reset thermal cutout

•Totally enclosed UL listed motor

•Pilot light (power on indicator)

•Chrome-plated finned tubular element

•Control panel on bottom of unit for ease

of installation and service

•Single-point power connection

•Meets all UL, NEC and OSHA

requirements (when installed as

directed)

•Corrosion-resistant in high humidity and

water-saturated areas (for areas where

corrosion-resistance is needed in

non-hazardous areas).

304 Stainless Steel Casing

Control Components (24-Volt Standard)

NEMA 4x Non-Metallic Enclosure

Element

Stainless Steel

Discharge Grille

Easy-mount bracket for Use with

Field- Installed Hanger or Optional

Mounting Brackets

Door Interlock

Disconnect Switch

(Optional)

Pilot Light (Heater

Energized)

Three-Position Fan Switch

Thermostat

Aluminum Fan Blade

Totally Enclosed Motor

Plated Inlet Grille

Control Enclosure

7UH-PRC003-EN

Features and

Benefits Model UHXA

Trane Explosion-Proof

Electric Unit Heaters

Pressure Relief Valve

Rated at 200 PSI

Spiral Aluminum Finned Tubular Steel

Heat Exchanger Core Liquid Filled

Operation (see page 3)

14-Gauge Steel Adjustable

Louvers with Minimum

Position Stops

Epoxy Coated 14-Gauge Cold Rolled

Steel Cabinet

Cast Aluminum Control Enclosure

with Oversized Opening

Built-In Load Carrying Contactor

Protective Heating Element Cover

Copper Sheathed Immersion Type

Heating Element

High Performance Aluminum Fan

Blades (not shown)

Etched Aluminum Data Plates

Riveted to Case

UH-PRC003-EN8

Features and

Benefits Model UHXA

Liquid to air heat exchanger with low

watt density heating elements in

ethylene glycol solution that provides

freeze protection to -45°C.

Ball bearing permanently lubricated

explosion-proof motor. Chrome plated

guard meets OSHA requirements.

Heavy-duty control contactor with

24-volt control circuit provided on all

models.

Designed for rugged industrial

applications in hazardous locations

where the possibility of explosion or fire

exists due to the presence of certain

flammable gases, vapors, powdered

metals or dusts.

•Permanently sealed, liquid to air, finned

tube heat exchanger core.

•Ethylene glycol water mixture used as

heat transfer fluid in the heater core,

providing -45°C, (-49°F) freeze damage

protection.

•High-performance electric motor

driven fan blows air across finned tubes

to effect uniform heat transfer and area

heat distribution.

•Automatic reset capillary type high limit

provides high temperature regulation

and is rated for 100,000 cycles of

service.

•Stainless steel and aluminum pressure

relief valve handles any over-pressure.

•14-gauge steel cabinet contains heater

core, motor and fan assembly.

•Narrow gap safety fan guard shields all

moving parts.

•Adjustable louvers allow directional

control of air.

•Copper conductor wires enclosed in

rigid metal conduits carry all electrical

power.

•Box lugs are furnished for field

connections within an approved

enclosure.

9UH-PRC003-EN

Features and

Benefits

Model UHWA

Series 20 and 50

Heavy-Duty Wall Heaters

Trane heavy-duty wall mounted electric

forced-air unit heaters are

architecturally styled in a

vandal- resistant design for all

commercial, institutional and many

industrial applications. They are

particularly suited for schools, office

buildings, dormitories, stores, hospitals

and other public buildings.

The high capacity and wide range of

voltage/phase and control systems

provides application versatility to meet

most installation requirements. A wide

selection of built-in factory installed and

wired, pre-engineered control systems

minimizes system design and

installation time.

All units are equipped with zero voltage

reset thermal cut-outs for overheat

protection and a totally enclosed,

permanently lubricated motor. Optional

circuit breaker, control transformer and

a selection of integral or wall-mounted

thermostat controls are part of the unit

package.

Series 50 with exposed thermostat knob

and covered circuit breaker and control

switch only

Series 50 with tamper-resistant cover

removed.

Series 20 and 50 with tamper-resistant

thermostat cover plate which is included

with each heater.

Louvered Grille

Heavy-duty welded steel for maximum

impact resistance. Closely spaced

(pencil proof), tamperproof.

Motor Shield

Protects motor by separating return air

from heated air.

Motor

Heavy-duty unit bearing, permanently

lubricated, totally enclosed, impedance

protected.

Blade

Highly efficient, space saving blade-

over-motor design, individually

balanced.

Contactor

Optional, definite purpose, heavy-duty

type with flame path separators and

dust covers. Choice of heater voltage,

120 volt or 24 volt holding coil.

Thermostat

Optional heavy-duty hydraulic snap

action type with sensing bulb in return

airstream. Disconnects all ungrounded

conductors in OFF position.

Solid Construction and

Dependable Components

Sleeve

Sleeve for surface or semi-recessed

installation. 16 gauge (1.5 mm

thickness) zinc coated steel.

Element

Totally enclosed, corrosion-resistant.

Maximum finning for lower operating

temperature and longer life. Will not

become dust clogged. (No filter

required.)

Thermal Cut-Out

Exclusive “zero voltage reset” type for

high degree of effectiveness if normal

operating temperatures are exceeded.

Transformer

Optional factory assembled and wired

in 50 Series. Choice of 24 or 120 volt

secondary.

Entrance Terminals

Line side termination enclosed for safe

servicing of heaters when supplied with

circuit breakers.

Circuit Breakers

Reduces installation cost by allowing

one or more heaters to be wired from

feeder and feeder tap. Separate control

circuit switch supplied when required.

All power can be turned off before front

cover is removed.

UH-PRC003-EN10

Features and

Benefits

Model UHWA

Series 20 and 50

•Architecturally styled and

vandal- resistant for schools, churches,

stores, office buildings, transportation

terminals, dormitories, hospitals.

•Use in vestibules, entrance ways,

lobbies, corridors, stairways, reception

rooms, rest rooms, offices.

•Simple application design — Wide

selection of built-in, factory installed and

wired, pre-engineered control systems.

Saves design and on-the-job time.

•Versatile application — Higher capacity

and wider range of voltage/phase and

control systems than any similar

heaters previously available.

•Heater front withstands with less than

1/16” (1.6 mm) permanent distortion,

10.8 ft lbs (324 poundals) impact and

400 lbs (181.4 kg) static force applied to

an 8 sq. in. (5160 sq. mm) area at center

grille location.

11UH-PRC003-EN

Features and

Benefits

Model UHCA

Series 70 and 80

Series 70 and 80 Features

•Crisp, unique styling to blend into any

architectural design — unit designed for

long life and warranted for five years.

•Higher velocity ceiling-mounted heater

gets air down to warm those hard to

heat areas where public accessibility is

not desired or where wall area is

restricted.

•Single or multiple installations at a

fraction of the cost of cabinet unit

heaters.

•Five-year warranty.

•2,000 to 5,000 watts.

•208, 204 V single and three-phase.

277 V single-phase.

•UL listed and conform to Underwriters’

Standard 1025.

Commercial and Industrial

Ceiling - Mounted Fan Forced Heaters

Commercial and Institutional

Applications

•Use in vestibules, entrance ways,

lobbies, restrooms and small office and

guard building applications.

•A unique design offers surface and

recessed applications with higher

wattage capacity and wider range of

voltage and phase capabilities than

other heaters of this type.

•Control: Line voltage and low voltage

control capabilities using accessory

thermostat (see page 8).

• Unit mounted controls for Series 80

only with fan purge.

Mounting Bracket — features swing up

installation on surface mounted 70

Series. Bracket center notched to

accept screws of ceiling outlet box

(installed by others). Recessed heater

80 Series has junction box attached to

heater can.

Motor — heavy-duty unit bearing,

permanently lubricated, totally

enclosed, impedance protected.

Blade — highly efficient, space-saving

blade over motor design, individually

balanced.

Thermal Cut-Out — exclusive “zero

voltage reset” type for highest degree

of effectiveness in event normal

operating temperatures are exceeded.

Heater must be manually shut off for

five minutes to reset. (See page 8.)

Element — totally enclosed and

corrosion resistant. Maximum finning

for lower operating temperatures and

long life. Will not become dust clogged.

(No filter required.)

Discharge Venturi — bull’s-eye design

permitting heated air to leave in

uniform pattern.

Plaster Trim — optional plaster trim for

recessed mounted heaters (series 80)

only. Provides finished ceiling

appearance.

Series 80

Recess mounted for 2’ (609.6 mm) x

2’ (609.6 mm) “T” bar or plaster

ceilings

UH-PRC003-EN12

Features and

Benefits

Model UHAA

Series 3320

Architectural Quality

•Built - in tamper resistant thermostat

•Built - in tamper resistant disconnect

switch

•Richly styled, rugged grille

•Whisper-quiet sound level

•Fan delay

•Decorator designed for functional

beauty and versatility.

•Five-year element, limited warranty

•UL listed

Rugged Grille — Grille made of 18

gauge (1.2 mm thickness) steel painted

with a dark brown baked enamel finish.

Richly Styled Grille — Grille is

highlighted by a snap-on, 14-gauge

(1.9 mm thickness) aluminum frame,

secured to the heater with an

inconspicuous fastener.

Element — Steel sheath with plate heat

exchanger.

Fan Delay Switch — To allow the fan to

continue to run for a short period after

the thermostat is satisfied, to expel

warm air from inside the heater. Also

delays fan on start up to insure delivery

of heated air. This switch also prolongs

element life.

“Unique” Vane Axial Fan Wheel —

Draws in large volumes of air then

quietly and gently discharges 175 cfm

(82.6 l/s) of heated air downward into

the room.

Optional Accessories

3320EX33 Surface Mounting Adapter

Factory-Installed Accessories

Suffix R Day/Night Relay

13UH-PRC003-EN

Application

Considerations Model UHXA

Abbreviated descriptions of UL classes,

groups and divisions. Before selecting any

heater for a particular application, refer to

Article 500 as well as other standards

referenced in the National Electric Code.

•Class I: Equipment does not have

surface operating temperature in

excess of the ignition temperature of

the specific gas or vapor.

•Class II: Equipment does not have

surface temperature greater than the

ignition temperature of the specified

dust.

•Group D: Atmospheres such as but not

limited to acetone, alcohol, gasoline,

lacquer solvent vapors, natural gas,

propane or other gases or vapors of

equivalent hazard.

•Group E: Atmospheres containing

combustible metal dust regardless of

resistivity, or other combustible dust

of similar hazard characteristics

having resistivity of less than

105 ohm-centimeter.

•Group F: Atmospheres containing

carbon black, charcoal, coal or coke

dust.

•Group G: Atmospheres containing

combustible dust having resistivity of

105 ohm-centimeter or greater.

•Division I: A location in which ignitable

concentrations of flammable material

exist under normal operating conditions.

•Division II: Locations in which flammable

materials will normally be confined

within closed containers and escape

only in the case of accidental rupture,

breakdown or during maintenance

operations. Any equipment approved

for Division I is automatically also

approved for Division II.

Selection and application of electric unit

heaters should consider the location,

classification and properties of flammable

vapors, liquids, gases, dusts and fibers

which may be present. Each room,

section or area should be considered

individually.

For further information consult National

Electric Code and National Fire Prevention

Association (ANSI) standards. All models

conform to OSHA requirements when

mounted at any height.

Installation Conditions

Refer to owner’s manual.

The Trane explosion-proof electric unit

heaters have been listed by the

Underwriters Laboratories for maximum

surface temperatures. Use only in

atmospheres having an ignition

temperature higher than 165°C (T3B) for

Class I and Class II operation.

Altitude restrictions — see specification

table.

Heater must be installed in permanently

mounted upright position and connected

to fixed power supply.

Do not operate in atmospheres corrosive

to steel and aluminum.

UH-PRC003-EN14

Selection

Procedure

Model UHEC, UHRA, UHXA, UHWA,

UHCA, UHAA

Calculate the heating loads using the

NEMA, ASHRAE, or other accepted

heating load calculation method.

Determine the quantity and size of unit

heaters to be used. To maintain uniform

temperature and recommended air

circulation, it is suggested that cfm should

be adequate to accomplish three air

changes per hour.

For maximum comfort, the use of smaller

units with lower airflows is suggested to

provide more uniform temperature and

even airflow. In warehouses and storage

areas where uniform heat distribution

and temperature control is of lesser

importance, it is desirable to use fewer

units with greater capacity.

Unit heaters mounted in the horizontal

discharge position are most effective

when heat is directed along the perimeter

of the building wall with the airflow of

each unit supporting the airflow of the

other units to create a constant flow of

warm air.

Model UHEC and Model UHRA

Unit heaters in the vertical position are

ideal for use in high ceiling areas and

areas where low mounting heights

would interfere with personnel or

equipment activity. Units mounted in the

vertical discharge position should not be

mounted higher than the unit’s published

maximum mounting height ratings.

When unit heaters are used to temper

areas such as loading dock doors, one or

more units should be arranged to

blanket the exposed opening.

15UH-PRC003-EN

Model Number

Description

Model UHXA

Digits 1-3 —

Electric Explosion-Proof

Unit Heater

Digit 4 — Development Sequence

Digits 5-6 — Unit Capacity

03 — 3 kW

05 — 5 kW

07 — 7.5 kW

10 — 10 kW

15 — 15 kW

20 — 20 kW

25 — 25 kW

Digit 7 — Element Phase

1 — Single Phase

3 — Three Phase

Digit 8 — Voltage

A — 208 Volts

B — 240 Volts

D — 480 Volts

F — 600 Volts

Digit 9 — Control Voltage

1 — 24 Volts (STD)

2 — 120 Volts (For 208, 240 & 480 Volts only)

3 — 208 Volts (For 208 Volts only)

4 — 240 Volts (For 240 Volts only)

Digit 10 — Design Sequence

Notes:

1. Available in 3 phase only.

2. Available in 480 volts or 600 volts,

3 phase only.

3. Available for 3 kW, 5 kW and 7.5 kW in

208 and 240 volts and 10 kW in 240 volts

only.

Model UHEC

Digits 1-3 — Electric Unit Heater

Digit 4 — Development Sequence

Digits 5-6 — Unit Capacity

03 — 3.3 kW

05 — 5 kW

07 — 7.5 kW

10 — 10 kW

15 — 15 kW

20 — 20 kW

25 — 25 kW

30 — 30 kW

40 — 40 kW

50 — 50 kW

Digit 7 — Element Phase

1 — Single-phase

2 Single-phase/three-phase

(field convertible)

3 — Three-phase

Digit 8 — Element and Motor Voltage

A — 208 V

B — 240/208 V

C — 277 V — Single-phase only

D — 480 V — Three-phase only

Digit 9 — 24-Volt Control Transformer

0 — None - wired for direct line voltage

A — Transformer - for 24-volt control

circuits

Digit 10 — Design Sequence

Digit 11 — Contactors

0 — None - wired for direct line voltage

A — Contactor - for 24-volt control circuits

Model UHRA

Digits 1-3 — Electric Hose-Down Corrosion

Resistant Unit Heater

Digit 4 — Development Sequence

Digits 5-6 — Unit Capacity

03 — 3.3 kW

05 — 5 kW

07 — 7.5 kW

10 — 10 kW

15 — 15 kW

20 — 20 kW

25 — 25 kW

30 — 30 kW

40 — 40 kW

48 — 48 kW

Digit 7 — Element Phase

1 — Single-phase

3 — Three-phase

Digit 8 — Element Voltage

A — 208 V

G — 240 V

C — 277 V

D — 480 V

F — 600 V

Digit 9 — 24-Volt Control

Transformer/Relay

A — Transformer/Relay — Standard

Digit 10 — Design Sequence

Digit 11 —Thermostat/off/on/fan switch

— Factory installed and wired

T — Thermostat/off/on/fan switch —

Standard

Model UHEC,

UHRA, UHXA

UH-PRC003-EN16

Model Number

Description Model UHWA

Model UHWA

Digits 1-3: Unit Type

UHW = Electric Wall Mounted Unit Heater

Digit 4: Development Sequence

Digits 5 - 6: Unit Capacity

02 = 2 kW

03 = 3 kW

04 = 4 kW

05 = 5 kW

Digit 7: Element Phase

1 = 1 Phase/60 Cycle

3 = 3 Phase/60 Cycle

Digit 8: Element and Motor Voltage

A = 208 Volt

B = 240 Volt

C = 277 Volt

Digit 9: Unit Series

2 = Unit Series 20

5 = Unit Series 50

Digit 10: Current Design Sequence

Digit 11: Built-in Thermostat

0 = None

T = Unit Mounted Tamper Proof

Thermostat

Digit 12: Wall Box

2 = Series 20 Wall Box

5 = Series 50 Wall Box

Digit 13: Extension Sleeves

0 = No Extension Sleeves

A = 4” (102 mm) Ext Surface Mounted

(20 Series)

B = 2” (51 mm) Ext Semi-Recessed

(20 Series)

C = 1” (25 mm) Ext Semi-Recessed

(20 Series)

D = 4” (102mm) Ext Surface Mounted

(50 Series)

E = 2” (51 mm) Ext Semi-Recessed

(50 Series)

F = 1” (25 mm) Ext Semi-Recessed

(50 Series)

Digit 14: Wall Mounted Line Voltage Thermostat

1 = DPST 1-Phase Line Voltage

2 = DPST 1-Phase Tamper Resistant

3 = DPST 3-Phase Line Voltage

4 = SPST Pilot Duty Line Voltage

5 = SPST Pilot Duty Tamper Resistant

Digit 15: Contactors

H = Line Voltage

J = 24V

K = 120V

Digit 18: Circuit Breaker

L = Unit Mounted

Digit 19: Transformer 24 Volt

M = 24V Transformer

Digit 20: Transformer 120 Volt

P = 120V Transformer

17UH-PRC003-EN

Model UHCA

Digit 1-3: Unit Type

UHC = Electric Ceiling Mounted Commercial

Heater

Digit 4: Development Sequence

Digits 5-6: Unit Capacity

02 = 2 kW

03 = 3 kW

04 = 4 kW

05 = 5 kW

Digit 7: Element Phase

1 = 1 Phase/60 Cycle

3 = 3 Phase/60 Cycle

Digit 8: Element and Motor Voltage

A = 208 Volt

B = 240 Volt

C = 277 Volt

Digit 9: Unit Series

2 = Surface Mounted, Unit Series 70

5 = Recess Mounted, Unit Series 80

Digit 10: Current Design Sequence

Digit 12-13: Unit Mounted Thermostat

T1 = Single Pole Thermostat

T2 = Double Pole Thermostat

Digit 14: Unit Mounted Disconnect

S = Unit Mounted Disconnect Switch

Digit 15-16: Unit Mounted Relay

R1 = Unite Mounted 24 Volt Transformer/Relay

R = Unit Mounted Line Voltage Relay

R2 = Unit Mounted 120 Volt Relay

Digit 17: Plaster Trim

A = Plaster Trim

Digit 18: Wall Mounted Line Voltage Thermostat

1 = DPST 1-Phase Line Voltage Thermostat

2 = DPST 1-Phase Tamper Resistant Thermostat

3 = DPST 3-Phase Line Voltage Thermostat

4 = SPST Pilot Duty Line Voltage Thermostat

5 = SPST Pilot Duty Tamper Resistant

Thermostat

Digit 19: Control Panels

A = 24V Control Panel for 208V, 1-Contactor

B = 24V Control Panel for 240V, 1-Contactor

C = 24V Control Panel for 277V, 1-Contactor

D = 24V Control Panel for 208V, 2-Contactor

E = 24V Control Panel for 240V, 2-Contactor

F = 24V Control Panel for 277V, 2-Contactor

G = 24V Control Panel for 208V, 3-Contactor

H = 24V Control Panel for 240V, 3-Contactor

J = 24V Control Panel for 277V, 3-Contactor

1 = 120V Control Panel for 208V, 1-Contactor

2 = 120V Control Panel for 240V, 1-Contactor

3 = 120V Control Panel for 277V, 1-Contactor

4 = 120V Control Panel for 208V, 2-Contactor

5 = 120V Control Panel for 240V, 2-Contactor

6 = 120V Control Panel for 277V, 2-Contactor

7 = 120V Control Panel for 208V, 3-Contactor

8 = 120V Control Panel for 240V, 3-Contactor

9 = 120V Control Panel for 277V, 3-Contactor

Digit 20: Low Voltage Thermostat Option

0 = No Low Voltage T-Stat

7 = Low Voltage T-Stat

Digit 21: Thermal Relay with Transformer

0 = No Thermal Relay

A = SPST Relay w/Transformer

Digit 22: Tamper Proof Kit

8 = Tamper Proof Kit

Model UHCA

Model Number

Description

UH-PRC003-EN18

Model UHAA

Model Number

Description

Model UHAA

Digit 1 - 3: Unit Type

UHA = Electric Architectural Wall Heater

Digit 4: Development Sequence

Digits 5–6: Unit Capacity

15 = 1.5 kW

02 = 2 kW

03 = 3 kW

04 = 4 kW

48 = 4.8 kW

Digit 7: Element Phase

1 = 1 Phase/60 Cycle

Digit 8: Element and Motor Voltage

A = 208 Volt

B = 240 Volt

C = 277 Volt

E = 120 Volt

Digit 9: Built-in Thermostat

T = Unit Mounted Tamperproof Thermostat

Digit 10: Current Design Sequence

Digit 11: Unit Mounted Disconnect

D = Unit Mounted Disconnect Switch

Digit 12: Day/Night Relay

0 = None

R = Unit Mounted Day/Night Relay

Digit 13: Surface Mounting Adapter Option

0 = None

A = 3320EX33 Surface Mounting Adapter

19UH-PRC003-EN

Table GD-1 — Model UHEC

Electrical Data Air Delivery Data

Element Min. Supply Airflow Approx. Horiz. Rec. Max.

Unit Capacity and Std. Max. Circuit Wire At Air Rise Air Mounting

Model kW Btu/Hr Motor Element Control Amp Fuse Gauge Motor Data Outlet @ Outlet Throw Height (Ft)

Number Rating (000) Voltage Phase Voltage Rating Size (60°C) Hp Rpm (Cfm) (F) (Ft) Horiz. Vert.

UHEC-031A0C0 3.3 11.2 208 1 208 15.9 20A 12G 1/125 1550 400 26 12 9 9

UHEC-031B0C0 3.3/2.5 11.2/8.5 240/208 1 240/208 13.7/11.9 20A/15A 12GA/14GA 1/125 1550 400 26 12 9 9

UHEC-031AACA 3.3 11.2 208 1 24 15.9 20A 12G 1/125 1550 400 26 12 9 9

UHEC-032A0C0 3.3 11.2 208 1-3 208 15.9/9.2† 20A 12GA 1/125 1550 400 26 12 9 9

UHEC-032B0C0 3.3/2.5 11.2/8.5 240/208 1-3 240/208 13.7/11.9 20A/15A 12GA/14GA 1/125 1550 400 26 12 9 9

7.9/6.9†

UHEC-031C0C0 3.3 11.2 277 1 277 11.9 15A 14GA 1/125 1550 400 26 12 9 9

UHEC-031CACA 3.3 11.2 277 1 24 11.9 15A 14G 1/125 1550 400 26 12 9 9

UHEC-033DACA 3.3 11.2 480 3 24 4.0 15A 14GA 1/125 1550 400 26 12 9 9

UHEC-031BACA 3.3/2.5 11.2/8.5 240/208 1 24 13.7/11.9 20A/15A 12GA/14GA 1/125 1550 400 26 12 9 9

UHEC-032AACA 3.3 11.2 208 1-3 24 15.9/9.2† 20A 12GA 1/125 1550 400 26 12 9 9

UHEC-032BACA 3.3/2.5 11.2/8.5 240/208 1-3 24 13.7/11.9 20A/15A 12GA/14GA 1/125 1550 400 26 12 9 9

7.9/6.9†

UHEC-051A0C0 5.0 17.1 208 1 208 24.1 35A 8GA 1/125 1550 400 40 12 9 9

UHEC-052AACA 5.0 17.1 208 1-3 24 24.1/13.9 35A 8GA 1/125 1550 400 40 12 9 9

UHEC-051B0C0 5.0/3.7 17.1/12.8 240/208 1 240/208 20.9/18.1 30A/25A 10GA/10GA 1/125 1550 400 40 12 9 9

UHEC-052A0C0 5.0 17.1 208 1-3 208 24.1/13.9

†

35A 8GA 1/125 1550 400 40 12 9 9

UHEC-052B0C0 5.0/3.7 17.1/12.8 240/208 1-3 240/208 20.9/18.1 30A/25A 10GA/10GA 1/125 1550 400 40 12 9 9

12.1/10.4†

UHEC-052BACA 5.0/3.7 17.1/12.8 240/208 1-3 24 20.9/18.1 30A/25A 10GA/10GA 1/125 1550 400 40 12 9 9

12.1/10.4†

UHEC-051C0C0 5.0 17.1 277 1 277 18.1 25A 10GA 1/125 1550 400 40 12 9 9

UHEC-053DACA 5.0 17.1 480 3 24 6.1 15A 14GA 1/125 1550 400 40 12 9 9

UHEC-051AACA 5.0 17.1 208 1 24 24.1 35A 8GA 1/125 1550 400 40 12 9 9

UHEC-051BACA 5.0/3.7 17.1/12.8 240/208 1 24 20.9/18.1 30A/25A 10GA/10GA 1/125 1550 400 40 12 9 9

UHEC-05ACACA 5.0 17.1 277 1 24 18.1 25A 10GA 1/125 1550 400 40 12 9 9

UHEC-072AACA 7.5 25.6 208 1-3 24 36.1 20.8 50A 6GA 1/50 1550 700 34 22 10 12

20.8

†

UHEC-072BACA 7.5/5.6 25.6/19.2 240/208 1-3 24 31.3/27.1 40A/35A 8GA/8GA 1/50 1550 700 34 22 10 12

18.1/15.6†

UHEC-071CACA 7.5 25.6 277 1 24 27.1 35A 8GA 1/50 1550 700 34 22 10 12

UHEC-073DACA 7.5 25.6 480 3 24 9.1 15A 14GA 1/50 1550 700 34 22 10 12

UHEC-102AACA 10.0 34.1 208 1-3 24 47.8/27.7

†

60A 4GA 1/50 1550 700 45 22 10 14

UHEC-102BACA 10.0/7.5 34.1/25.6 240/208 1-3 24 42.2/36.1 60A/50A 4GA/6GA 1/50 1550 700 45 22 10 14

24/20.8†

UHEC-101CACA 10.0 34.1 277 1 24 36.1 50A 6GA 1/50 1550 700 45 22 10 14

UHEC-103DACA 10.0 34.1 480 3 24 12.1 20A 12GA 1/50 1550 700 45 22 10 14

UHEC-153AACA 15.0 51.2 208 3 24 41.7 60A 4GA 1/20 1550 1100 43 32 11 20

UHEC-153BACA 15.0/11.2 51.2/38.4 240/208 3 24 36.1/31.3 50A/40A 6GA/6GA 1/20 1550 1100 43 32 11 20

UHEC-153DACA 15.0 51.2 480 3 24 18.1 25A 10GA 1/20 1550 1100 43 32 11 20

UHEC-203BACA 19.7/14.8 67.2/50.5 240/208 3 24 47.8/41.1 70A/60A 4GA/4GA 1/20 1550 1100 57 32 12 18

UHEC-203DACA 20.0 68.3 480 3 24 24.1 35A 8GA 1/20 1550 1100 57 32 12 18

UHEC-253AACA 25.0 85.3 208 3 24 69.5 90A 2GA 1/12 1550 2000/1800 40/44 45 12 22

UHEC-253BACA 25.0/18.7 85.3/64.0 240/208 3 24 60.2/52.1 80A/70A 3GA/4GA 1/12 1550 2000/1800 40/44 45 12 22

UHEC-253DACA 25.0 85.3 480 3 24 30.1 40A 8GA 1/15 1550 2000/1800 40/44 45 12 22

UHEC-303AACA 30.0 102.4 208 3 24 83.4 110A 1GA 1/12 1550 2000/1800 47/53 40 12 20

UHEC-303BACA 30.0/22.5 102.4/76.8 240/208 3 24 72.3/62.5 100A/80A 1GA/3GA 1/12 1550 2000/1800 47/53 40 12 20

UHEC-303DACA 30.0 102.4 480 3 24 36.2 50A 6GA 1/15 1550 2000/1800 47/53 40 12 20

UHEC-403AACA 40.0 136.5 208 3 24 111.2 150A 1/0* 1/4 1550 3100/2800 40/45 55 15 24

UHEC-403BACA 40.0/30.0136.5/102.4 240/208 3 24 96.4/83.4 125A/110A 1/0/1GA 1/4 1550 3100/2800 40/45 55 15 24

UHEC-403DACA 39.0 133.1 480 3 24 47.0 70A 4GA 1/5 1550 3100/2800 40/45 55 15 24

UHEC-503AACA 50.0 170.6 208 3 24 139.0 175A 2/0* 1/4 1550 3100/2800 51/56 50 15 22

UHEC-503BACA 50.0/37.5170.6/128.0 240/208 3 24 120.5/104.3 175A/175A 2/0/2/0 1/4 1550 3100/2800 51/56 50 15 22

UHEC-503DACA 50.0 170.6 480 3 24 60.3 80A 3GA 1/5 1550 3100/2800 51/56 50 15 22

Notes: 1. Maximum amp rating indicates single-phase on those units suitable for both single and three-phase. 2. 25 through 50 kW models are wired for two-stage, low voltage control. These units

are also equipped with two-speed motors for Hi-Lo fan operation with addition of fan switch option. 3. Dual voltage unit ratings indicate highest voltage performance. 4. 1 kW equals 3,413 BTU.

*Supply wire on these models should have insulation rated 75°C minimum.

† Amp Rating for three-phase operation.

General Data Model UHEC

UH-PRC003-EN20

General Data Model UHEC

Table GD-2 — Model UHEC — Metric

Unit Heater Airflow Approx. Horiz. Rec. Max

Capacity at Air Rise Air Mounting

kW Motor Data Outlet @ Outlet Throw Height (M)

Rating Watts R.P.S. (L/S) (C) (M) Horizontal Vertical

3.3 6 25.8 189 14.4 3.7 2.7 2.7

5.0 6 25.8 189 22.2 3.7 2.7 2.7

7.5 14 25.8 330 18.9 6.7 3.0 3.7

10 14 25.8 330 25.0 6.7 3.0 4.3

15 37 25.8 519 23.9 9.8 3.4 6.1

20 37 25.8 519 31.7 9.8 3.7 5.5

25 62 25.8 944/ 22.2/ 13.7 3.7 6.7

849 24.4 13.7 3.7 6.7

25 50 25.8 944/ 22.2/ 13.7 3.7 6.7

480/3 Mtr 849 24.4 13.7 3.7 6.7

30 62 25.8 944/ 26.1/ 12.2 3.7 6.1

849 29.4 12.2 3.7 6.1

30 50 25.8 944/ 26.1/ 12.2 3.7 6.1

480/3 Mtr 849 29.4 12.2 3.7 6.1

40 186 25.8 1463/ 22.2/ 16.8 4.6 7.3

1321 25.0 16.8 4.6 7.3

40 149 25.8 1463/ 22.2/ 16.8 4.6 7.3

480/3 Mtr 1321 25.0 16.8 4.6 7.3

50 186 25.8 1463/ 28.3/ 15.2 4.6 6.7

1321 31.1 15.2 4.6 6.7

50 149 25.8 1463/ 28.3/ 15.2 4.6 6.7

480/3 Mtr 1321 31.1 15.2 4.6 6.7

Note 1. 25 through 50 kW models are equipped with two-speed motors for Hi-Lo fan operation with addition of fan switch

option.

21UH-PRC003-EN

General Data Model UHRA

Table GD-3 — Model UHRA

Unit Motor &

Model Heater Max

Number kW Volts/ Control Amp Motor Motor

UHRA Rating Btu/Hr Phase Volts Rating H P RPM

031AAAT 208/1 15.9

033AAAT 208/3 9.2

031GAAT 240/1 13.8

033GAAT 3.3 11,200 240/3 24 8.0 35 mhp 1550

031CAAT 277/1 12.0 (21 w) (26 rps)

033DAAT 480/3 4.0

033FAAT 600/3 3.2

051AAAT 208/1 24.1

053AAAT 208/3 13.9

051GAAT 240/1 20.9

053GAAT 5.0 17,100 240/3 24 12.1 35 mhp 1550

051CAAT 277/1 18.1 (21 w) (26 rps)

053DAAT 480/3 6.1

053FAAT 600/3 4.9

071AAAT 208/1 36.1

073AAAT 208/3 20.9

071GAAT 240/1 31.3

073GAAT 7.5 25,600 240/3 24 18.1 35 mhp 1550

071CAAT 277/1 27.1 (21 w) (26 rps)

073DAAT 480/3 9.1

073FAAT 600/3 7.3

101AAAT 208/1 48.1

103AAAT 208/3 27.8

101GAAT 240/1 41.7

103GAAT 10 34,130 240/3 24 24.1 35 mhp 1550

101CAAT 277/1 36.2 (21 w) (26 rps)

103DAAT 480/3 12.1

103FAAT 600/3 9.7

151AAAT 208/1 72.2

153AAAT 208/3 41.7

151GAAT 240/1 62.5

153GAAT 15 51,200 240/3 24 36.2 35 mhp 1550

153DAAT 480/3 18.1 (21 w) (26 rps)

153FAAT 600/3 14.5

203AAAT 208/3 55.6

203GAAT 20 68,260 240/3 24 48.2 1/3 1625

203DAAT 480/3 24.1 (249 w) (27 rps)

203FAAT 600/3 19.3

253AAAT 208/3 69.5

253GAAT 25 85,325 240/3 24 60.3 1/3 1625

253DAAT 480/3 30.2 (249 w) (27 rps)

253FAAT 600/3 24.1

303AAAT 208/3 83.4

303GAAT 30 102,390 240/3 24 72.3 1/3 1625

303DAAT 480/3 36.2 (249 w) (27 rps)

303FAAT 600/3 29.0

403DAAT 40 136,520 480/3 24 48.2 1/3 1625

403FAAT 600/3 38.6 (249 w) (27 rps)

483DAAT 48 163,824 480/3 24 57.9 1/3 1625

483FAAT 600/3 46.3 (249 w) (27 rps)

Table GD-4 — Air Delivery Data

Unit F Deg.

Model Temp. Air Rec.

Number Cfm FPM Rise Throw Mtg.

UHRA kW Outlet Outlet Outlet Feet Height

031AAAT

033AAAT

031GAAT

033GAAT 3.3 400 500 26°F 20 Ft. 6 Ft.

031CAAT (189 L/S) (2540 MM/S) (-3.3°C) (6.1 M) (1.8 M)

033DAAT

033FAAT

051AAAT

053AAAT

051GAAT

053GAAT 5.0 400 500 40°F 20 Ft. 6 Ft.

051CAAT (189 L/S) (2540 MM/S) (4.4°C) (6.1 M) (1.8 M)

053DAAT

053FAAT

071AAAT

073AAAT

071GAAT

073GAAT 7.5 400 500 60°F 20 Ft. 6 Ft.

071CAAT (189 L/S) (2540 MM/S) (16°C) (6.1 M) (1.8 M)

073DAAT

073FAAT

101AAAT

103AAAT

101GAAT

103GAAT 10 700 660 45°F 28 Ft. 6 Ft.

101CAAT (330 L/S) (3353 MM/S) (7.2°C) (8.5 M) (1.8 M)

103DAAT

103FAAT

151AAAT

153AAAT

151GAAT

153GAAT 15 700 660 68°F 28 Ft. 6 Ft.

153DAAT (330 L/S) (3353 MM/S) (20°C) (8.5 M) (1.8 M)

153FAAT

203AAAT

203GAAT 20 1400 1000 45°F 35 Ft. 6 Ft.

203DAAT (661 L/S) (5080 MM/S) (7.2°C) (10.7 M) (1.8 M)

203FAAT

253AAAT

253GAAT 25 1400 1000 56°F 35 Ft. 6 Ft.

253DAAT (661 L/S) (5080 MM/S) (13.3°C) (10.7 M) (1.8 M)

253FAAT

303AAAT

303GAAT 30 1400 1000 68°F 35 Ft. 6 Ft.

303DAAT (661 L/S) (5080 MM/S) (20°C) (10.7 M) (1.8 M)

303FAAT

403DAAT 40 1800 1000 70°F 42 Ft. 6 Ft.

403FAAT (849 L/S) (5080 MM/S) (21°C) (12.8 M) (1.8 M)

483DAAT 48 1800 1000 84°F 42 Ft. 6 Ft.

483FAAT (849 L/S) (5080 MM/S) (29°C) (12.8 M) (1.8 M)

UH-PRC003-EN22

Table GD-5 — Air Delivery Characteristics

Velocity of Air Movement (FPM)

Heater Distance from Heater

Capacity 6 Ft. 12 Ft. 24 Ft. Throw

(kW Rating) (1.8 M) (3.7 M) (7.3 M) Distance Weight

3.3, 5.0 210 80 25 36 Ft. 45 lbs.

7.5 (12.8 M/S) (4.9 M/S) (1.5 M/S) (11 M) (20.4 Kg)

10, 15 270 95 45 46 Ft. 55 lbs.

(16.5 M/S) (5.8 M/S) (2.7 M/S) (14 M) (24.9 Kg)

Table GD-6 — Air Delivery Characteristics

Velocity of Air Movement (FPM)

Heater Distance from Heater

Capacity 10 Ft. 20 Ft. 30 Ft. Throw

(kW Rating) (3.0 M) (6.1 M) (9.1 M) Distance Weight

20, 25, 750 450 300 55 Ft. 85 lbs.

30 (45.7 M/S) (27.4 M/S) (18.3 M/S) (16.8 M) (39 Kg)

40, 48 900 500 350 65 Ft. 130 lbs.

(54.9 M/S) (30.5 M/S) (21.3 M/S) (19.8 M) (59 Kg)

Table GD-7 — Unit Electrical Data

Model BTU/Hr.

Number Watts Output

UHRA-03 3.300 11,261

UHRA-05 5,000 17,062

UHRA-07 7,500 25,594

UHRA-10 10,000 34,125

UHRA-15 15,000 51,188

UHRA-20 20,000 68,250

UHRA-25 25,000 85,313

UHRA-30 30,000 102,375

UHRA-40 40,000 136,500

UHRA-48 48,000 163,800

General Data Model UHRA

23UH-PRC003-EN

General Data Model UHXA

Table GD-8 — Model UHXA

Air Temp. Air Temp. Max Min*

Model No. Volts/ Motor Heater Line BTU/ Rise Rise Min. Cir. Fuse Wire

Unit Size UHXA Phase H P Amps Amps Hr. Deg. F Deg. C Ampacity Amps AWG

031A1B 208/1 14.4 16.3 20.4 25 10

033A1B 208/3 8.3 9.8 12.3 15 14

3 kW 033B1B 240/1 1/412.5 14.8 10239 16.6 9.2 18.5 20 12

033B1B 240/3 (186W) 7.2 8.6 10.8 15 14

033D1B 480/3 3.6 4.3 5.4 15 14

033F1B 600/3 2.9 3.5 4.4 15 14

051A1B 208/1 24.0 26.0 32.4 35 8

053A1B 208/3 13.9 15.4 19.2 20 12

5 kW 051B1B 240/1 1/420.8 23.1 17065 27.6 15.3 28.9 30 10

053B1B 240/3 (186 W) 12.0 13.4 16.8 20 12

053D1B 480/3 6.0 6.7 8.4 15 14

053F1B 600/3 4.8 5.4 6.8 15 14

071A1B 208/1 36.1 38.0 47.5 50 8

073A1B 208/3 20.8 22.3 27.9 30 10

7.5 kW 071B1B 240/1 1/431.3 33.6 25598 41.4 23.0 42.0 45 8

073B1B 240/3 (186 W) 18.0 19.4 24.3 25 10

073D1B 480/3 9.0 9.7 12.2 15 14

073F1B 600/3 7.2 7.8 9.8 15 14

103A1B 208/3 27.8 29.3 36.6 40 8

101B1B 240/1 41.7 44.0 55.0 60 6

10 kW 103B1B 240/3 1/424.1 25.5 34130 21.7 12.1 31.8 35 8

103D1B 480/3 (186 W) 12.0 12.7 15.9 20 12

103F1B 600/3 9.6 10.2 12.8 15 14

153A1B 208/3 41.6 43.5 54.4 60 6

15 kW 153B1B 240/3 1/236.1 38.1 51195 19.2 10.7 47.6 50 8

153D1B 480/3 (186 W) 18.0 19.0 23.8 25 10

153F1B 600/3 14.4 15.2 19.0 20 12

203D1B 480/3 1/224.1 25.1 31.3 35 8

20 kW 203F1B 600/3 (373 W) 19.2 20.0 68260 26.2 14.6 25.1 30 10

253D1B 480/3 1/230.1 31.1 38.8 40 8

25 kW 253F1B 600/3 (373 W) 24.1 24.9 85325 32.8 18.2 31.1 35 8

*Supply conductors must be suitable for 90°C

1. 1 watt equals 3.413 Btu.

2. 1 kW equals 3,413 Btu.

3. 24 volt control voltage is standard and includes built-in contactor and 24 volt control transfer.

UH-PRC003-EN24

General Data Model UHXA

Table GD-9 — Model UHXA with 120 Volt Control Voltage

Air Temp. Air Temp. Max Min*

Model No. Volts/ Motor Heater Line BTU/ Rise Rise Min. Cir. Fuse Wire

Unit Size UHXA Phase H P Amps Amps Hr. Deg. F Deg. C Ampacity Amps AWG

031A2B 208/1 14.4 16.3 20.4 25 10

033A2B 208/3 8.3 9.8 12.3 15 14

3 kW 033B2B 240/1 1/412.5 14.8 10239 16.6 9.2 18.5 20 12

033B2B 240/3 (186W) 7.2 8.6 10.8 15 14

033D2B 480/3 3.6 4.3 5.4 15 14

051A2B 208/1 24.0 26.0 32.4 35 8

053A2B 208/3 13.9 15.4 19.2 20 12

5 kW 051B2B 240/1 1/420.8 23.1 17065 27.6 15.3 28.9 30 10

053B2B 240/3 (186 W) 12.0 13.4 16.8 20 12

053D2B 480/3 6.0 6.7 8.4 15 14

071A2B 208/1 36.1 38.0 47.5 50 8

073A2B 208/3 20.8 22.3 27.9 30 10

7.5 kW 071B2B 240/1 1/431.3 33.6 25598 41.4 23.0 42.0 45 8

073B2B 240/3 (186 W) 18.0 19.4 24.3 25 10

073D2B 480/3 9.0 9.7 12.2 15 14

103A2B 208/3 27.8 29.3 36.6 40 8

101B2B 240/1 41.7 44.0 55.0 60 6

10 kW 103B2B 240/3 1/424.1 25.5 34130 21.7 12.1 31.8 35 8

103D2B 480/3 (186 W) 12.0 12.7 15.9 20 12

153A2B 208/3 41.6 43.5 54.4 60 6

15 kW 153B2B 240/3 1/236.1 38.1 51195 19.2 10.7 47.6 50 8

153D2B 480/3 (186 W) 18.0 19.0 23.8 25 10

20 kW 203D2B 480/3 1/2 (373 W) 24.1 25.1 68260 26.2 14.6 31.3 35 8

25 kW 253D2B 480/3 1/2 (373 W) 30.1 31.1 85325 32.8 18.2 38.8 40 8

*Supply conductors must be suitable for 90°C.

1. 120 volt control voltage is standard and includes built-in contactor and 120 volt control transformer.

2. Not available for 600 volt heaters.

Table GD-10 — Model UHXA with 208 or 240 Volt Control Voltage

Air Temp. Air Temp. Max Min*

Model No. Volts/ Motor Heater Line BTU/ Rise Rise Min. Cir. Fuse Wire Control

Unit Size UHXA Phase H P Amps Amps Hr. Deg. F Deg. C Ampacity Amps AWG Voltage

031A3B 208/1 14.4 16.3 20.4 25 10 208

3 kW 033A3B 208/3 1/4 8.3 9.8 12.3 15 14 208

033B4B 240/1 (186 W) 12.5 14.8 10239 16.6 9.2 18.5 20 12 240

033B4B 240/3 7.2 8.6 10.8 15 14 240

051A3B 208/1 24.0 26.0 32.4 35 8 208

5 kW 053A3B 208/3 1/413.9 15.4 19.2 20 12 208

051B4B 240/1 (186 W) 20.8 23.1 17065 27.6 15.3 28.9 30 10 240

053B4B 240/3 12.0 13.4 16.8 20 12 240

071A3B 208/1 36.1 38.0 47.5 50 8 208

7.5 kW 073A3B 208/3 1/420.8 22.3 27.9 30 10 208

071B4B 240/1 (186 W) 31.3 33.6 25598 41.4 23.0 42.0 45 8 240

073B4B 240/3 18.0 19.4 24.3 25 10 240

103A3B 208/3 27.8 29.3 36.6 40 8 208

10 kW 101B4B 240/1 1/441.7 44.0 34130 21.7 12.1 55.0 60 6 240

103B4B 240/3 (186 W) 24.1 25.5 31.8 35 8 240

15 kW 153A3B 208/3 1/241.6 43.5 54.4 60 6 208

153B4B 240/3 (186 W) 36.1 38.1 51195 19.2 10.7 47.6 50 8 240

*Supply conductors must be suitable for 90°C.

1. Not available for 480 and 600 volt heaters.

25UH-PRC003-EN

General Data Model UHXA

Table GD-11 — Model UHXA

Unit Size 3 kW, 5 kW & 7.5 kW 10 kW 15 kW, 20 kW & 25 kW

Capacities 3 kW 10,236 Btu 10 kW 34,120 Btu 15 kW 51,180 Btu

Available 5 kW 17,060 Btu 20 kW 68,240 Btu

7.5 kW 25,590 Btu 25 kW 85,300 Btu

UL Listing Class I, Group D, Divisions 1 & 2

Class II, Groups E, F & G, Divisions 1 & 2

UL Temperature Class I: T3B 165°C (329°F)

Code Class II: T3B 165°C (329°F)

CFM @ 70°F (21°C) 580 1500 2450

L/S @ 21°C (70°F) 274 708 1156

FPM 1000 1600 2000

MM/S 5080 8128 10160

Air Temperature Rise 3 kW 16.3°F 10 kW 21.0°F 15 kW 19.0°F

9.1°C 11.7°C 10.6°C

5 kW 27.2°F 20 kW 25.5°F

15.1°C 14.2°C

7.5 kW 40.8°F 25 kW 32.3°F

22.7°C 17.9°C

Horizontal 24 ft. 40 ft. 43 ft.

Throw 7.3 M 12.2 M 13.1 M

Max. Mtg. Height 8 ft. 10 ft. 13 ft.

from floor 2.4 M 3.1 M 4.0 M

Max. Operational 3 kW, 5 kW, 10 kW & 15 kW - 8000 ft. (2438 M)

Altitude 20 kW - 7000 ft. (2134 M)

7.5 kW & 25 kW - 5500 ft. (1676 M)

Ambient Temperature Limits Min. -45°C, (-49°F)

Max. 40°C, (104°F)

RPM/RPS 1725/29 1725/29 1725/29

Propeller Fan — 3 wing, Aluminum 12” Dia. (305 mm) 16” Dia. (406 mm) 20” Dia. (508 mm)

Motor Motor Voltage/Phase same as element. PSC, Explosion-Proof, Permanently Lubricated, Ball Bearing

1/4 HP (186 W) 1/4 HP (186 W) 1/2 HP (373 W)

Heat Exchanger Heavy wall, liquid filled with immersion elements.

Core Material Steel with aluminum fins.

Heat Transfer Fluid Ethylene-glycol solution, protected to -45°C (-49°F).

Heating Elements Three, low watt density, immersion type copper sheathed.

Thermal Cut-Out Snap action capillary type rated 100,000 cycles pilot duty.

Relief Valve Stainless steel and aluminum construction, opens @ 200 PSI (1379 kPa).

Cabinet 14-gauge cold rolled steel, epoxy coated, individually adjustable louvers.

Fan Guard Wire, less than 1/4” (6.4 mm) spacing, plated, split design for easy removal.

Fasteners Zinc plated.

Conduit Material 3/4 (19.1 mm) rigid metal.

Control Box Cast aluminum with oversized opening. (2) 1” (25.4 mm) NPS with conduits stops for field wiring.

Hanger Connections 5/8” (15.9 mm) NC tap, 2 holes.

Contactors Heavy-duty, break all ungrounded conductors rated 100,000 cycles @ full load. Built-in and prewired.

Control Transformer Built-in and prewired - 24 volt secondary (standard) and 120 volt (optional).

Control Circuits 24 volt standard on all models.

120 volt optional on 208, 240 and 480 volt models.

Line voltage on 208 and 240 volt models only.

Remote wall mounted Explosion-proof 40-90°F operating range

Thermostats Models 22A, 125-277 VAC - 3/4 HP @ 125 VAC; 11/2 HP

TW161 & TW162 @ 250-277 VAC.

Built-in “T” Option 125 VA pilot duty Sensing Bulb and Capillary made from 300 Series Stainless Steel ASW Tube.

Heater Net Weight 3, 5 & 7.5 kW 10 kW 15, 20 & 25 kW

132 lbs (60 Kg) 158 lbs (72 Kg) 190 lbs (86 Kg)

Shipping Weight 3, 5 & 7.5 kW 10 kW 15, 20 & 25 kW

167 lbs (76 Kg) 193 lbs (88 Kg) 225 lbs (102 Kg)

UH-PRC003-EN26

Model UHWA

Series 20 and 50

General Data

Table GD-12 — Electric Wall-Mounted Unit Heaters — Series 20

Model No. Order No. Element Element Ship Wt. Ship Wt. Degree F Degree C

Watts UHWA 233 + Motor Voltage Phase Lbs Kg BTU Air Rise Air Rise

021A2AT -400 208 1

2000 Watts 021B2AT -402 240 1 41 18.6 6,826 27 15

021C2AT -404 277 1

031A2AT -406 208 1

3000 Watts 031B2AT -408 240 1 41 18.6 10,239 41 23

031C2AT -410 277 1

041A2AT -412 208 1

041B2AT -414 240 1

4000 Watts 041C2AT -416 277 1 41 18.6 13,652 57 32

043A2AT -418 208 3

043B2AT -420 240 3

051A2AT -422 208 1

051B2AT -424 240 1

5000 Watts 051C2AT -426 277 1 41 18.6 17,065 73 41

053A2AT -428 208 3

053B2AT -430 240 3

Note: ONLY thermostat and/or contactor may be built-in on Series 20 wall heaters.

Table GD-13 — Electric Wall-Mounted Unit Heaters — Series 50

Model No. Order No. Element Element Ship Wt. Ship Wt. Degree F Degree C

Watts UHWA 233 + Motor Voltage Phase Lbs Kg BTU Air Rise Air Rise

021A5AT -431 208 1

2000 Watts 021B5AT -433 240 1 54 24.5 6,826 27 15

021C5AT -435 277 1

031A5AT -437 208 1

3000 Watts 031B5AT -439 240 1 55 24.9 10,239 41 23

031C5AT -441 277 1

041A5AT -443 208 1

041B5AT -445 240 1

4000 Watts 041C5AT -447 277 1 55 24.9 13,652 57 32

043A5AT -449 208 3

043B5AT -451 240 3

051A5AT -453 208 1

051B5AT -455 240 1

5000 Watts 051C5AT -457 277 1 55 24.9 17,065 73 41

053A5AT -459 208 3

053B5AT -461 240 3

Note: If circuit breaker and/or transformers are required, the Series 50 wall heater must be ordered. 1 Watt Equals 3.413 Btu.

27UH-PRC003-EN

General Data

Table GD-15 — Series 80 Electric Ceiling Recessed Heaters

Model Order Element

No. No. + Motor Element Mounting Amp *Degree F *Degree C

Watts UHCA 233 Voltage Phase Application Rating BTU Air Rise Air Rise

021A8A -331 208 1 Recessed 9.6

2000 021B8A -333 240 1 Recessed 8.3 6,826 15 13.9

021C8A -335 277 1 Recessed 7.2

031A8A -337 208 1 Recessed 14.4

3000 031B8A -339 240 1 Recessed 12.5 10,239 32 17.8

031C8A -341 277 1 Recessed 10.8

041A8A -343 208 1 Recessed 19.2

041B8A -345 240 1 Recessed 16.7

4000 041C8A -347 277 1 Recessed 14.4 13,652 40 22.2

043A8A -349 208 3 Recessed 11.1

043B8A -351 240 3 Recessed 9.6

051A8A -353 208 1 Recessed 24.1

051B8A -355 240 1 Recessed 20.8

5000 051C8A -357 277 1 Recessed 18.1 17,065 44 24.4

053A8A -359 208 3 Recessed 13.9

053B8A -361 240 3 Recessed 12.1

Recessed Mounted Ceiling Heaters — Series 80 packed as a complete unit. Contains junction box, heater box and grille. For

finished ceiling application, use plaster trim (PT3480) which is an optional accessory. Approximate weight 35 lbs (15.9 kg) for

use with 2’ (609.6 mm) x 2’ (609.6 mm) T-bar or hard surface.

* Use PT3480 plaster trim for Series 80 when recessed in a hard finished ceiling. Option Accessory.

Performance Data —

*Degree F (c) air rise measured at 710 fpm (3606.8 mm/s) and 425 cfm (201 l/s) in both 70 and 80 Series.

Throw designed for 8 foot (2438.4 mm) to 12 foot (3657.6 mm) ceilings.

DB RE 10-12 WATT = 63.9

Table GD-14 — Series 70 Electric Ceiling Surface Heaters

Model Order Element

No. No. + Motor Element Mounting Amp *Degree F *Degree C

Watts UHCA 233 Voltage Phase Application Rating BTU Air Rise Air Rise

021A7A -300 208 1 Surface 9.6

2000 021B7A -302 240 1 Surface 8.3 6,826 15 13.9

021C7A -304 277 1 Surface 7.2

031A7A -306 208 1 Surface 14.4

3000 031B7A -308 240 1 Surface 12.5 10,239 32 17.8

031C7A -310 277 1 Surface 10.8

041A7A -312 208 1 Surface 19.2

041B7A -314 240 1 Surface 16.7

4000 041C7A -316 277 1 Surface 14.4 13,652 40 22.2

043A7A -318 208 3 Surface 11.1

043B7A -320 240 3 Surface 9.6

051A7A -322 208 1 Surface 24.1

051B7A -324 240 1 Surface 20.8

5000 051C7A -326 277 1 Surface 18.1 17,065 44 24.4

053A7A -328 208 3 Surface 13.9

053B7A -330 240 3 Surface 12.1

Surface Mounted Ceiling Heaters — Series 70 designed to be mounted to standard 4 inch (101.6 mm) ceiling

box furnished and installed by others. Approximate weight 32 lbs (14.5 kg) packed and shipped as complete

unit.

Model UHCA

Series 70 and 80

UH-PRC003-EN28

General Data

Table GD-16 – Electrical Specifications and Ordering Information

Unit No. Volts kW Watts Btu/Hr Output Wgt Lbs Wgt Kg

UHAA151ETAD 120

UHAA151BTAD 240 1.5 1500 5119 22 10

UHAA151ATAD 208

UHAA151CTAD 277

UHAA021BTAD 240

UHAA021ATAD 208 2.0 2000 6825 22 10

UHAA021CTAD 277

UHAA031BTAD 240

UHAA031ATAD 208 3.0 3000 10240 22 10

UHAA031CTAD 277

UHAA041BTAD 240

UHAA041ATAD 208 4.0 4000 13650 22 10

UHAA041CTAD 277

UHAA481BTAD 240

UHAA481ATAD 208 4.8 4800 16380 22 10

UHAA481CTAD 277

Notes: 1 watt equals 3.413 btu.

1000 Watts Equals 1 kW.

Model UHAA

Series 3320

29UH-PRC003-EN

Control Wiring Model UHXA

The Trane heaters have been designed

for explosion-proof service with single

and 3-phase inputs of 208, 240, 480 and

600 volts. They meet stringent UL

requirements. However, it is essential

that correct installation procedures be

followed to eliminate all potential hazards

arising from faulty installation.

24 Volt Control

WD1 – Single Phase

208, 240 Volt

WD2 – Three Phase

208, 240, 480 Volt

WD1 WD2

WD3 WD4

WD5

WD7

120 Volt Control

WD3 – Single Phase

208, 240 Volt

WD4 – Three Phase

208, 240, 480 Volt

Line Voltage Control

WD5 – Single Phase

208, 240 Volt

WD6 – Three Phase

208, 240 Volt

600 Volt

WD7 – Three Phase

24 Volt Only

WD8 – Three Phase

120 Volt Only

600 Volt

Three Phase Heater

with 120 Volt Control

600 Volt

Three Phase Heater

with 24 Volt Control

Single Phase Heater

with 24 Volt Control

Single Phase Heater

with 120 Volt Control

Single Phase Heater

Line Voltage Control

208V or 240V Models

Only

Three Phase Heater

with 24 Volt Control

Three Phase Heater

with 120 Volt Control

Three Phase Heater

Line Voltage Control

208V or 240V Models

Only

WD6

WD8

UH-PRC003-EN30

Controls

Control Systems

Type of Control WD Heater Type

Built-in thermostat control 1 20 & 50 (1)

Wall mounted thermostat, heater voltage, line duty. For single phase heaters use SP or DP (DP if used as a disconnect) 2 20 & 50 (1)

of sufficient capacity. For three-phase heaters use TW1512 which cycles two poles simultaneously.

Wall mounted, heater voltage, pilot duty, one or more heaters. Heater has built-in contactor with heater voltage coil. 3 20 & 50 (1)

Wall mounted, 120 V, pilot duty, one or more heaters. Heater has built-in contactor with 120 V coil. 4 20 & 50

Wall mounted, 24 V, pilot duty, one or more heaters. Heater has built-in contactor with 24 V coil. 4 20 & 50

Wall mounted, 24 V. Heater has built-in contactor with 24V coil and heater voltage/24 V transformer. 5 50 Only

Wall mounted, pilot duty, 120 V. Heater has built-in contactor with 120V coil and heater voltage/120 V transformer. 5 50 Only

(1) If built-in circuit breaker and/or built-in transformer are desired, 50 Series must be ordered.

Transformer with 24 V secondary (A1) available on all models.

Transformer with 120 V secondary (A2) available on following models only:

All three-phase models

277 V one-phase up to 4000 watts

208 and 240 V one-phase up to 3000 watts

Accessories

For accessory built-in controls:

T Built-in thermostat breaks all

ungrounded conductors in OFF

position.

C Circuit breaker (Series 50 only)

arranged to be disconnected

before removal of front with line

side terminals covered for safe

maintenance. Additional control

circuit switch installed if required.

R Built-in contactor holding coil same

as heater voltage.

R1 Built-in contactor 24V holding coil.

R2 Built-in contactor 120V holding coil.

A1 Built-in control transformer, (Series

50 only) 24V secondary.

A2 Built-In control transformer, (Series

50 only) 120V secondary available

on all three-phase heaters, up to

3000 watts on 208 and 240V,

one - phase and up to 4000 watts on

277V, 1-phase.

For semi-recessed and surface

mounting:

20 Series

20 EX 34 Extension sleeve for

full surface mounting.

20 EX 16 Extension sleeve for

extending front additional

2” (50.8 mm) from finished

wall.

Heater recesses 2 1/4”

(57.2 mm).

20 EX 8 Extension sleeve for

extending front additional

1” (25.4 mm) from finished

wall.

Heater recesses 3 1/4”

(82.6 mm).

20 Box Must be used on all heater

installations.

50 Series

50 EX 34 Extension sleeve for full

surface mounting.

50 EX 16 Extension sleeve for

extending front additional

2” (50.8 mm) from finished

wall.

Heater recesses 2 1/4”

(57.2 mm).

50 EX 8 Extension sleeve for

extending front additional

1” (25.4 mm) from finished

wall.

Heater recesses 3 1/4”

(82.6 mm).

50 Box Must be used on all heater

installations.

Model UHWA

Series 20 and 50

31UH-PRC003-EN

Control Wiring

Optional Control Systems

• Heaters operated from wall mounted,

line voltage, heavy-duty thermostats.

• Direct Line Voltage. More than one

heater may be controlled from one

thermostat providing total amperage of

heaters does not exceed thermostat

rating.

• Single-Phase Heaters. Use any good

quality single pole thermostat of sufficient

ampacity. Use double pole thermostat if

positive off is desired. Knob operated and

tamper resistant type available.

• Three-Phase Heaters. Use TW1512.

Makes and breaks two poles

simultaneously.

• Control Panels. For control of one or

more single or three-phase ceiling

heaters from one 24V or 120V

thermostat. Panels are in NEMA 1

enclosures and have one or more

30 amp, three-pole, 600 VAC contactor(s),

operating voltage to control voltage

transformer and transformer fusing.

(User must provide separate circuit for

each contactor.)

• Three-phase heaters shall be used with

a control panel when controlled by a low

voltage (24V or 120V) thermostat.

• Low Voltage Thermostat (Wall

Mounted). Heaters operated from wall

mounted, low voltage thermostats.

• Thermal Relay With Built-In Line

Voltage/24 Volt Transformer. Relay with

built-in line volt/24 V transformer are

provided for use with wall mounted low

voltage thermostat. For remote mounting

only.

Single Phase

Typical heater element, motor, zero

voltage reset thermal cut-out

Three Phase

Optional

• Unit Mounted Controls for Series 80

Recessed Ceiling Heater only shall be

factory installed and wired on the

Heater.

T2 = Tamper Proof Built-in Thermostat

Double Pole.

S = Disconnect Switch.

R1 = Transformer with 24 volt

Secondary and Relay for low

voltage control.

R = Relay — Coil operates on heater

supply voltage.

R2 = Relay — Provided with 120 volt

control coil.

Fan purge (off delay to dissipate

residual heat on shut off) supplied as a

standard control on heaters with factory

installed options.

Model UHCA

Series 70 and 80

UH-PRC003-EN32

CEILING

HEATER

Dimensional

Data Model UHEC

Unit Casing (Inches)

Unit Size H W D

3.3-5 17 3/4 (451) 14 15/32 (368) 6 1/2 (165)

7.5-10 24 5/16 (618) 21 1/2 (546) 6 1/2 (165)

15-20 28 11/16 (729) 21 1/2 (546) 6 1/2 (165)

25-50 34 (864) 29 1/4 (743) 10 1/16 (256)

Unit Casing

Weld-Nut Location Dimensions, Inches (mm)

Horizontal Vertical

Unit Size A B C D E F

3.3-5 3 1/32 (77) 5 1/4 (133) 2 7/16 (62) 1 5/32 (29) 11 5/32 (283) 5 7/16 (138)

7.5-10 7 17/32 (191) 5 1/4 (133) 3 1/2 (89) 1 7/8 (48) 16 1/16 (408) 6 3/8 (162)

15-20 7 17/32 (191) 5 1/4 (133) 3 1/2 (89) 1 7/8 (48) 20 7/16 (519) 6 3/8 (162)

25-50 10 27/32 (275) 8 13/16 (224) 6 13/16 (173) 1 7/8 (48) 26 1/2 (673) 5 5/8 (143)

Vertical Mounting Bracket Clearance Requirements (Inches)

Minimum Distance

Model Adjacent Mounting

Unit Mounting Ceiling Surface Floor Bracket Wt. Dimensions

Size Bracket To Unit To Unit To Unit* lbs. (Kg) E F G

3.3-5 V5105 12 (305) 12 (305) 84 (2134) 9 (4.1) 26 (660) 9 1/8 (232) 18 3/4 (476)

7.5-20 V5120 18 (457) 24 (610) 84 (2134) 13 (5.9) 36 9/16 (929) 13 7/8 (352) 24 1/2 (622)

25-50 V5150 18 (457) 24 (610) 84 (2134) 13 (5.9) 42 (1067) 13 7/8 (352) 28 1/16 (713)

*Do not exceed unit’s maximum mounting height.

Horizontal Wall/Ceiling Swivel Bracket Clearance Requirements (Inches)

Minimum Distance

Model Adjacent Mounting

Unit Mounting Ceiling Surface Floor Bracket Wt. Dimensions

Size Bracket To Unit To Unit To Unit* lbs. (Kg) A B C

3.3-5 A5105 12 (305) 12 (305) 84 (2134) 6 (2.7) 19 15/64 (487) 10 1/2 (267) 9 1/4 (235)

7.5-20 A5120 18 (457) 12 (305) 84 (2134) 9 (4.1) 23 (584) 12 (305) 19 1/8 (486)

25-50 A5150 18 (457) 12 (305) 84 (2134) 11 (5.0) 26 21/32 (677) 13 1/2 (343) 19 7/8 (505)

*Do not exceed unit’s maximum mounting height.

All dimensions approximate.

Certified prints available on request.

Horizontal Air Discharge Vertical Air Discharge

Horizontal Air Discharge

33UH-PRC003-EN

Dimensional

Data Model UHEC

Louver Cone Diffuser Dimensions, in. (mm)

Unit Size P R S T

03 & 05 N/A N/A N/A N/A

07 & 10 11 5/8 (295.3) 14 1/4 (362.0) 6 1/2 (165.1) 1 3/4 (44.5)

15 & 20 11 5/8 (295.3) 14 1/4 (362.0) 6 1/2 (165.1) 1 3/4 (44.5)

25-50 17 1/8 (435.0) 21 (533.4) 9 3/4 (247.7) 2 3/4 (69.9)

Vertical Air Discharge

Louver Cone Diffuser

UH-PRC003-EN34

Dimensional

Data Model UHRA

Dimensions, in. (mm)

Unit Size A B C D E F G H

03,05,07 12” (305) 18” (457) 19

” (502 15

” (387) 16

” (419) 6 Ft. (1.8 M) 8” (203) 6” (152)

10,15 14” (356) 19” (483) 21

” (552) 15

” (387) 18” (457) 6 Ft. (1.8 M) 8” (203) 6” (152)

20,25,30 16” (406) 27” (686) 28

” (730) 19

” (495) 17

” (445) 6 Ft. (1.8 M) 15

” (394) 4

” (114)

40,48 18” (457) 31” (787) 30

” (781) 19

” (495) 19

” (495) 6 Ft. (1.8 M) 21

” (552) 2

” (70)

3 kW thru 15 kW

20 kW thru 48 kW

Dimensions shown in ( ) are in

millimeters

35UH-PRC003-EN

Dimensional

Data Model UHXA

Unit C

Size A B 3 PH. 1 PH. D E F G

3-5 7.5 kW (450.9) (568.3) (501.7) (523.9) (412.8) (266.7) (355.6) (76.2)

10 kW (527.1) (669.9) (527.1) (549.3) (514.4) (292.1) (457.2) (101.6)

15-20 25 kW (628.7) (771.5) (571.5) — (616.0) (317.5) (558.8) (114.3)

Physical Dimensions, in. (mm)

Unit C

Size A B 3 PH. 1 PH. D E F G

3-5 7.5 kW 17 3/4” 22 3/8” 19 3/4” 20 5/8” 16 1/4” 10 1/2” 14” 3”

10 kW 20 3/4” 26 3/8” 20 3/4” 21 5/8” 20 1/4” 11 1/2” 18” 4”

15-20 25 kW 24 3/4” 30 3/8” 22 1/2” — 24 1/4” 12 1/2” 22” 4 1/2”

Dimensions shown in ( ) are in millimeters

Mounting Bracket Kit

In examples HLPM and HLWM, heater

may be rotated horizontally at attachment

point as required.

HLHM

Ceiling Mounting Bracket

Simple and economical if adequate

overhead structure exists. Requires

1/2” (13 mm) pipe, cut and threaded (not

supplied).

HLPM

Floor Mounting Bracket

Particularly useful in buildings with

insufficient strength to use other types of

mounts. Requires 3 1/2” (89 mm) pipe [4”

(102 mm) O.D. — not supplied].

HLWM

Wall Mounting Bracket

Ideal for use in buildings that have

substantial walls. Arm only can also be

bolted directly to structural steel.

UH-PRC003-EN36

Dimensional

Data

Model UHWA

Series 20 and 50

Control System Wiring

Diagrams

Typical Heater Element, Motor, “Zero Voltage Reset” Thermal

Cutout

Dimensions shown in are inches (mm)

37UH-PRC003-EN

Dimensional

Data

Model UHCA

Series 70 and 80

Series 70 — Surface Mounted

Series 70 — Surfaced Details

Series 80 — Recessed

Mounted

Note: Dimensions shown in in inches

(mm)

UH-PRC003-EN38

Dimensional

Data

Model UHAA

Series 3320

Dimensions are shown in inches (mm)

39UH-PRC003-EN

Options Model UHEC

Dust Shield

Horizontal

Heater and

Used On Wall Brackets Dust Shield

3.3 kW A5105 DS5105

7.5 kW to 20.0 kW A5120 DS5120

25.0 kW to 50.0 kW A5150 DS5150

Stratification Control Option

Electric UHEC unit heaters are an

efficient way to provide quick, efficient

heat when and where it’s required. A

wall thermostat with an optional

stratification thermostat makes the

Trane unit heater even more energy

efficient. The stratification thermostat

recovers trapped ceiling heat, saving

electrical energy. When ceiling

temperatures are high, the stratification

thermostat allows the fan to operate

without energizing the heating element.

Recovering this otherwise wasted heat

assures substantial energy savings.

Accessory

Fan Guard

Installation

OSHA Fan Guards

Diffuser Options

Optional diffusers lend added air pattern versatility to individual vertical down blown installations as shown in illustrations.

Model Diffuser

Description Used On No. Max. Mtg. Ht. Dim. A Dim. B Pattern

1. Louver Diffuser (Standard) 3.3 & 5.0 kW STD 9’ (2.7 M) 20’ (6.1 M) 10’ (3.0 M)

Louvers can be individually 7.5 & 10.0 kW STD 12’ (3.7 M) 40’ (12.2 M) 22’ (6.7 M)

adjusted for rectangular 15.0 & 20.0 kW STD 18’ (5.5 M) 52’ (15.8 M) 30’ (9.1 M)

coverage over doorways as 25.0 & 30.0 kW STD 22’ (6.7 M) 75’ (22.9 M) 42’ (12.8 M)

an air curtain or to meet 40.0 & 50.0 kW STD 24’ (7.3 M) 84’ (25.6 M) 47’ (14.3 M)

rectangular floor pattern

heating requirements.

2. General Distribution 3.3 & 5.0 kW N/R 9’ (2.7 M) 15’ (4.6 M)

(No Diffuser) 7.5 & 10.0 kW N/R 12’ (3.7 M) 30’ (9.1 M)

Trane’s Airchute Venturi 15.0 & 20.0 kW N/R 18’ (5.5 M) 40’ (12.2 M)

permits general downflow air 25.0 & 30.0 kW N/R 22’ (6.7 M) 55’ (16.8 M)

pattern distribution as 40.0 & 50.0 kW N/R 24’ (7.3 M) 64’ (19.5 M)

required at a higher mounting

height.

3. Anemostat Diffuser (Optional) 3.3 & 5.0 kW N/A — — — —

For application where draft 7.5 & 10.0 kW AD5120 10’ (3.0 M) 30’ (9.1 M)

restriction is required at lower 15.0 & 20.0 kW AD5120 15’ (4.6 M) 38’ (11.6 M)

unit mounting heights. 25.0 & 30.0 kW AD5150 17’ (5.2 M) 50’ (15.2 M)

40.0 & 50.0 kW AD5150 20’ (6.1 M) 60’ (18.3 M)

4. Louver Cone Diffuser 3.3 & 5.0 kW N/A 45° 90° 45° 90°

(Optional) 7.5 & 10.0 kW RD5120 — — — —

Individually adjustable blades 15.0 & 20.0 kW RD5120 10’ 3.0 M 14’ 4.3 M) 36’ 11.0 M 30’ 9.1 M

permit increased floor 25.0 & 30.0 kW RD5150 14’ 4.3 M 21’ 6.4 M 42’ 12.8 M 35’ 10.7 M

coverage at 45° open. 40.0 & 50.0 kW RD5150 20’ 6.1 M 30’ 9.1 M 62’ 18.9 M 44’ 13.4 M

Additional throw is 18’ 5.5 M 28’ 8.5 M 68’ 20.7 M 54’ 16.5 M

accomplished when blades

are 90° vertical. Allow higher

mounting height.

STD = Standard N/R = None Required N/A = Not Applicable

UH-PRC003-EN40

Model UHRA

•Remote 24-volt thermostat

•Stainless steel wall/ceiling mounting

bracket (3.3-15 kW)

•Cast iron painted mounting bracket

available on all units for wall/ceiling or

pipe mounting

•Hanging bracket for use with

threaded rod

Options

Model UHEC

Model UHRA

Model UHEC

Unit-Mounted Room and Stratification

Thermostats

Unit-mounted thermostats for field

installation are available in low voltage

(24V) for either single or two-stage

operation, and line voltage (up to 277V)

for single-stage operation. All room

thermostats have an adjustable

temperature setting range of 45°F (7.2°C)

to 90°F (32.2°C); and the stratification

thermostat has a range of 70°F (21.1°C) to

130°F (54.4°C).

Low voltage thermostats should only be

used with units provided with contactors

and a low voltage control transformer.

Line voltage thermostats can be used

with all units provided the thermostat’s

maximum amp and voltage ratings are

not exceeded. Line voltage thermostats

have a maximum amp rating of 25 amps,

and maximum voltage rating of 277V.

Two-stage thermostats can be used on

unit sizes 25 kW and above to provide

automatic two-stage heating operation.

Unit and Wall Mounted Summer-Fan

Switches

Unit mounted and wall mounted summer-

fan switches are available for line voltage

(up to 277V) and low voltage (24V).

Summer fan switches allow

fan only operation without energizing the

unit’s heating element. During the

nonheating season, the summer fan

switch will allow the unit’s fan to provide

air circulation without providing heat.

Wall-Mounted Room Thermostat

Wall-mounted thermostats are available

in low voltage (24V) for either single or

two-stage operation, and line voltage (up

to 277V) for single-stage operation. All

Line voltage thermostats have an

adjustable temperature setting range of

40°F (4.4°C) to 90°F (32.2°C).

Single stage low voltage thermostats

have a range of 50°F (10°C) to 80°F

(26.7°C), and two-stage low voltage

thermostats have a range of 45°F (7.2°C)

to 85°F (29.4°C).

The same guidelines for the application of

unit-mounted thermostats are also

applicable to wall-mounted thermostats.

Unit and Wall Mounted Power

Disconnect Switches

Unit and wall mounted power disconnect

switches are available to provide a

positive disconnect of the unit from the

power supply. Two-pole and three-pole

power disconnect switches are available

with voltage ratings from 25 to 63 amps.

41UH-PRC003-EN

Options Model UHXA

Mounting Bracket Kits

Trane makes three mounting kits

available — the HLPM Pipe Mounting

Bracket, the HLHM Ceiling Mounting

Bracket, and the HLWM Wall Mounting

Bracket. Each of these is illustrated and

described on page 20 of this brochure. To

order, specify the type of bracket with the

heater model desired.

Explosion-Proof Thermostat

Specifications

•TW161 Single Pole

•22 Amps 125-277 VAC

•3/4 Hp 125 VAC

•11/2 Hp 250-277 VAC

•51/2” H x 51/2” W x 43/4” D

•Can be used for heating or cooling

applications

Built-In Hydraulic Thermostat

Optional On All Models

•Stainless steel bulb and capillary

•125 VA pilot duty

•Used on 24 volt, 120 volt or 208-240

volt line voltage control

•60°F to 90°F temperature range

•Adjustable from front of unit with

screwdriver.

UH-PRC003-EN42

Mechanical

Specifications Model UHEC

Heaters shall be installed and wired in

accordance with the manufacturer’s

recommendations and applicable

national and local codes.

Casing

Casings fabricated of die-formed,

heavy gauge steel and finished in high

gloss, baked enamel. Supply air shall be

drawn through a stamped louver

periphery evenly across the heating

element, and discharged through an

outward drawn venturi. Adjustable

discharge louvers shall be provided to

control the direction of airflow. A large,

hinged access door shall extend the

width of the heater and locked in position

by quarter-turn fasteners. Heater and

supply wiring diagram shall be

permanently attached to the inside of the

access door.

Elements

Elements shall be high mass, all steel

tubular finned type, copper brazed.

Centrally located and installed in fixed

element banks.

Motors

Motors shall be totally enclosed, all angle

industrial rated. All units 3.3 through 20

kW will utilize sealed bearings to assure

permanent lubrication. 25 through 50 kW

units are provided with a two-speed,

permanent capacitor-type.

Fan Blades

Fan blades shall be of the axial

flow type designed for quiet efficient

operation. Fan speed does not exceed

1,600 rpm (26.7 R.P.S.).

Wiring

Heaters designed for a single circuit, with

elements, motor and control circuits

subdivided with factory wired fuses to

conform to the National Electric Code and

Underwriter’s Laboratory, Inc., Standard

1278. All three-phase heaters shall have

balanced phases.

Thermal Overload Protection

All heaters shall be equipped with

automatic reset thermal overloads which

shut down the element and motor if safe

operating temperatures are exceeded.

Fusing

Element, motor and transformer primary

fusing are factory installed and wired

where required by NEC. Branch circuit

fusing is installed where required (48

amps and up).

Control

Contactors and control circuit

transformers where required are factory

installed and wired. Only direct line

supply and thermostat connections in the

field are required. Two-stage operation is

standard on all units 25 kW and larger

with use of two-stage thermostats. Built-

in fan override is provided to purge unit

casing of excess heat after unit

shutdown. The units are listed under the

Reexamination Service of Underwriter’s

Laboratories, Inc. Units are warranted to

be free from defective material and

workmanship for a period of one year

with the exception of the heating

elements which are warranted for five

years.

Control Options

•Integral power disconnects (where

applicable) — supplied to disconnect all

ungrounded connectors in the “Off”

position. Disconnect is isolated from unit

wiring by use of a metal plate and fisch

paper.

•Thermostats (unit-mounted);

(wall- mounted) — heavy-duty

hydraulic actuating-type. Thermostat

range 45°F (7.2°C) to 90°F (32.2°C).

Unit-mounted thermostat can be

rendered tamperproof by removing the

temperature adjustment knob.

•Independent fan operation for summer

air circulation — provided from a line or

low voltage (unit- mounted)

(wall- mounted) fan switch.

•Combination low voltage wall

thermostat and fan switch — provided

to give wall mounted control of element

and fan.

•Stratification thermostat with a range of

70°F (21.1°C) to 130°F (54.4°C) —

provided for units mounted in the

vertical discharge position to provide an

energy saver cycle recovering warm

stratified air.

Optional Dust Shield

•For use on horizontal units with wall

brackets only, to protect from dust and

other particles falling inside the unit

heater.

Optional Diffusers

•Louver Cone Diffuser — shall have

individually adjustable blades to permit

increased floor coverage at 45 degrees

open. Additional throw is accomplished

when blades are 90 degrees vertical,

allowing higher mounting height.

•Anemostat Diffuser — for applications

where draft restriction is required at a

lower unit mounting height.

Quiet Operation

The heater’s air chute is specifically

designed with an outward deep-drawn

venturi to provide the maximum throw of

warm air forward in either the horizontal

or vertical mounting position.

Sound Ratings of Free Field

Unit Size dba Rating

3.3-5.0 kW 56

7.5-10 kW 57

15-20 kW 71

25-30 kW 70 High/70 Low Speed

40-50 kW 79 High/73 Low Speed

OSHA Fan Guards - Optional

Number Dim. From Center to Center

Model No. Unit Size of Holes Edge Dimension

OFG-5101 2-5 kW 4 1/4" (6.4 mm) 3 3/4" (95 mm)

OFG-5102 7-20 kW 4 1/4" (6.4 mm) 4 3/4" (121 mm)

OFG-5103 25-50 kW 4 1/4" (6.4 mm) 4 3/4" (121 mm)

1. For units with existing holes in louver frame, the fan guard snaps into place.

2. To retrofit the fan guard, holes must be drilled 1/8" (3.2 mm) diameter.

3. OSHA approved.

43UH-PRC003-EN

Mechanical

Specifications Model UHRA

Heaters shall be installed and wired in

accordance with the manufacturers

recommendations and applicable national

and local codes.

Casing

The casing that houses the heating

elements shall be fabricated from

16-gauge 304 stainless steel with a 304

stainless steel outlet protective grille and

angled outlet louvers to insure uniform air

flow and delivery temperature across the

entire face of the heater. The inlet grille

shall be chrome plated. The control

enclosure compartment factory installed

to the bottom of the heater shall be NEMA

4x nonmetallic provided with a hinged

and latched access door that opens from

the bottom to simplify wiring installation

and maintenance. A single point line

voltage connection is provided for 208,

240, 277, 480 and 600 volt service.

Elements

Heavy duty heating elements shall be

manufactured from rugged finned tubular

steel and chrome-plated for corrosion

resistance. Factory wired and sealed for

washdown applications.

Motors

Motors shall be totally enclosed

permanently lubricated manufactured

with corrosion resistant windings to resist

moisture and corrosion, factory wired to

NEMA 4x enclosure and UL Listed. Both

the motor and fan blade shall be factory

installed within the heaters casing on

rubber isolators to minimize vibration and

noise.

Fan Blades

Fan Blades shall be manufactured from

anodized aluminum and finished with an

epoxy coating.

Thermal Overload Protection

All heaters equipped with corrosion

resistant auto reset thermal overloads

shall be sealed to prevent moisture to

enclosure. Shuts down the element and

motor if safe operating temperatures are

exceeded.

Controls

All heaters shall be provided as standard

with 24-volt transformer and control

circuit, fusing (NEC required), pilot light

(power-on indicator), thermostat with

stainless steel capillary sensor and

three-position switch (heat- off-fan)

factory installed and wired in the control

enclosure compartment to the terminal

block for ease of wiring.

•Fan delay relay shall be provided as

standard factory installed and wired in

the control enclosure to maintain fan

operation for approximately 21/2

minutes (150 S) after the heating cycle

has ended.

•Disconnect switch with control

enclosure compartment door interlock

shall be furnished as standard factory

installed and wired.

Installation

All heaters shall be used in (non-

hazardous) locations with corrosive

atmospheres where humidity, incidental

water, water-saturated or direct spray of

water is the normal condition.

Supply Connections

Supply connections shall meet all local

and NEC requirements and shall be

suitable for use in WET or CORROSIVE

atmospheres and locations.

Wiring Instructions

The heaters wiring diagram for field

connections shall be located inside the

control enclosure and all field wiring

connections shall terminate in coded

terminal blocks. Terminal blocks shall be

suitable for either copper or aluminum

field wiring. A single power supply circuit

shall be provided for all voltages thru 48

kW size heaters.

UL, NEC and OSHA

Heaters shall meet all UL, NEC and

OSHA requirements when installed as

directed per Installation Operation

Maintenance Manual (UHRA-IOM-1)

dated March 1994.

Mounting Bracket Kits

Wall Mounting Bracket Kits — Model

A5520 shall be manufactured from

stainless steel and epoxy coated. Models

W5520, W5550, H5550, P5520 and

P5550 shall be manufactured from epoxy

coated steel.

UH-PRC003-EN44

Heaters shall be installed and wired in

accordance with the manufacturer’s

recommendations and applicable

national and local codes for use in

hazardous classified locations and shall

be UL listed.

UL Classes

For Class I, Group D, Divisions 1 and 2

and Class II, Groups E, F and G, Divisions 1

and 2.

Abbreviated descriptions of UL classes,

groups and divisions.

Before selecting any heater for a

particular application, refer to Article 500

as well as other standards referenced in

the National Electric Code.

•Class I: Equipment does not have

surface operating temperature in

excess of the ignition temperature of

the specific gas or vapor.

•Class II: Equipment does not have

surface temperature greater than the

ignition temperature of the specified

dust.

•Group D: Atmospheres such as but not

limited to acetone, alcohol, gasoline,

lacquer solvent vapors, natural gas,

propane or other gases or vapors of

equivalent hazard.

•Group E: Atmospheres containing

combustible metal dust regardless of

resistivity, or other combustible dust of

similar hazard characteristics having

resistivity of less than 105 ohm-

centimeter.

•Group F: Atmospheres containing

carbon black, charcoal, coal or coke

dust.

•Group G: Atmospheres containing

combustible dust having resistivity of

105 ohm-centimeter or greater.

•Division I: A location in which ignitable

concentrations of flammable material

exist under normal operating

conditions.

•Division II: Locations in which

flammable materials will normally be

confined within closed containers and

escape only in the case of accidental

rupture, breakdown or during

maintenance operations. Any

equipment approved for Division I is

automatically also approved for

Division II.

UL Temperature Codes

The UL temperature code is T3B 165°C

(329°F) for Class 1 and Class 2, indicating

maximum operating surface

temperatures.

Cabinet

Cabinet fabricated of 14-gauge (1.9 mm

thickness) cold rolled steel, with

individually adjustable louvers, epoxy

coated. A wire fan guard chrome-plated

with less than 1/4” (6.4 mm) spacing

conforms to NEMA requirements and

shields all moving parts to meet OSHA

requirements. Zinc plated fasteners,

conduit made of cadmium-plated

seamless steel tubing, cast aluminum

control box with opening and 25/8” (16

mm) NC top hanger connections.

Heat Exchanger

Heat exchanger double walled, liquid

filled with three low watt density

immersion type copper sheathed

elements hermetically sealed into the

core made of steel with aluminum fins.

Heat transfer fluid of ethylene-glycol

solution protected to -45°C (-49°F).

Motors

Motors PSC, explosion-proof,

permanently lubricated, ball bearing type,

1725 rpm (29 rps). Motor voltage/phase

same as element.

Fan Blade

Fan blades are made of aluminum

designed for quiet efficient operation.

Controls Factory Installed

Contactors shall be built-in and pre- wired

into an explosion-proof enclosure.

Contactors shall be heavy duty and break

all ungrounded conductors and be rated

for 100,000 cycles at all full load. Control

transformers where required shall be

built-in and pre-wired. Control circuits

shall be 24 volts on 208, 240, 480 and 600

volt heaters or 120 volts on 208, 240 and

480 volt heaters or 208 volts on 208 volt

heaters or 240 volts on 240 volt heaters.

Thermal Overload Protection

All heaters equipped with automatic

reset thermal overload switch capillary

type rated for 100,000 cycles of reliable

service for temperature regulation.

Relief Valve

Over-pressure arising from excessive

external temperature is relieved by a

pressure relief valve factory installed in

the top header tank. Made of stainless

steel opens @ 200 psi (1379 kPa).

Control Options:

•Explosion-proof thermostat

(wall- mounted) - SPST 40°F (4.4°C) -

90°F (32.2°C) 22 amps, 125-277 VAC,

3/4 HP (559 W) @ 125 VAC,

11/2 hp (1119 W) @ 250-277

VAC.

•Explosion-proof thermostat

(wall- mounted) - DPST 40°F (4.4°C) -

90°F(32.2°C) 22 amps, 125-277 VAC,

3/4 hp (559 W) @ 125 VAC,

11/2 hp (1119 W) @ 250-277 VAC.

•Explosion-proof hydraulic thermostat

(built-in) — 45°F (7.2°C) -90°F (32.2°C)

125 VA pilot duty.

Mounting Bracket Kits:

•Wall mounting bracket, ideal for use in

buildings that have substantial walls.

Note the arm only can be bolted directly

to structural steel.

•Ceiling mounting bracket, must have

adequate overhead structure to mount

to. Note 1/2” (12.7 mm) pipe, cut and

threaded and supplied by others is

required.

•Floor mounting bracket should be used

in buildings with insufficient strength to

use other types of mounting brackets.

To be used with

31/2” (88.9 mm) schedule 40 pipe 4”

(101.6 mm) OD supplied by others.

Mechanical

Specifications Model UHXA

45UH-PRC003-EN

Mechanical

Specifications

Model UHWA

Series 20 and 50

Contractor shall supply and install

heavy-duty, wall-mounted forced-air

electric unit heaters of the wattage,

voltage and phase as indicated on the

plans. The heater is designed to provide

an even distribution of heated air to the

space by drawing return air in the

periphery of the heater across the

element, which shall then be discharged

from the center section of the heater by

means of an electric motor and axial

flow fan blade.

Heaters are recessed to extend no

more than 1 1/2” (38.1 mm) from the

finished wall, surface mounted to

extend no more than 5 3/4” (146.1 mm)

from the finished wall or semi-recessed

to extend no more than 2 1/2” (63.5 mm)

from the finished wall.

Enclosure

Heater front can withstand, with less

than 1/16” (1.6 mm) permanent

distortion, 10.8 ft. lbs (324 poundals)

impact and 400 lbs. (181.4 kg) static

force applied to an 8 sq. in. (5160 sq

mm) area at center grille location.

The combination return and supply grille

assembly are constructed of 1/16” (1.6

mm) x 3/8” (9.5 mm) rounded edge

horizontal steel. Louvers are spaced for

maximum opening of 1/4” (6.4 mm).

Louvers are welded at every

intersection to three evenly spaced 1/16”

(1.6 mm) diameter vertical members

and completely framed in a

heavy - gauge natural anodized

aluminum extrusion. Front assembly

are be attached to the chassis by hidden

tamper-resistant (Allen-head) machine

screws. All other parts are 16-gauge

(1.5 mm thickness) steel zinc coated

both sides painted in a high gloss bronze

colored baked enamel finish.

Motor

Motors are permanently lubricated unit

bearing, totally enclosed, shaded pole

type with impedance protection. Motors

will operate at no more than 1400 rpm

(23.3 rps) and are the same voltage as

the heater. A protective shield shall

surround the motor to separate return

air from heated air.

Performance

Heaters have a rating of 245 cfm

(115.6 l/s) at 660 fpm (3352.8 mm/s)

with a maximum temperature rise of

73 F (40.6 C).

Elements

Element assemblies consist of two or

three corrosion-resistant steel sheathed

type elements mechanically bonded to

common corrosion-resistant steel fins.

Each sheathed element consist of

helically coiled nickel chromium

alloy- resistant wire completely

embedded in and surrounded by

magnesium oxide, enclosed and

wedged into corrosion- resistant steel

sheaths. Elements have 2” (50.8 mm)

cold conductor pins extending into the

sheath and have a density of no more

than 60 watts per inch (25.4 mm).

Thermal Overload

Heaters are equipped with a “zero

voltage reset” thermal overload which

disconnects elements and motor in the

event normal operating temperatures

are exceeded. For safety, if opened due

to abnormal temperatures, thermal

overload will remain open until

manually reset by turning heater off for

five minutes. Automatic reset thermal

overloads which allow the element to

continue to cycle under abnormal

conditions will not be accepted.

Warranty

Heaters are warranted for 5 years.

Approval

Heaters are Underwriters’ Laboratories

listed. Heaters are conform to

Underwriters’ Laboratories, Inc.

Standard 1025, Paragraphs 31.20,

31.21, 31.22 and 31.23. Heaters not

conforming to these paragraphs will not

be acceptable.

Optional Control Systems

Heaters are operated from

wall - mounted, line voltage, heavy-duty

(tamper-resistant) thermostats.

Heaters with built-in, pre-wired

contactors are operated from

wall - mounted, line voltage, pilot duty

(tamper-resistant) thermostats.

Heaters with built-in, pre-wired

contactors (and control transformers)

will be operated from wall-mounted,

pilot duty (24 V) or (120 V) wall-

mounted tamper-resistant thermostats.

Heaters are controlled by integrally

mounted thermostats. Thermostats are

heavy-duty, hydraulic type with a range

of 40 F (4.4 C) to 80 F (26.7 C) and with

remote sensing bulb placed in the return

air. Thermostats shall be electrically

rated at least 125 percent of heater

rating. Thermostats also act as a

disconnect by breaking all ungrounded

conductors in the OFF position.

(Thermostat control knob is covered by

a 16-gauge (1.5 mm thickness)

tamper- resistant access plate to

prevent adjustment by unauthorized

personnel.)

Contactors

Where required, heaters are equipped

with heavy-duty, definite purpose

contactors with flame path separators

and dust covers. Contactors will cycle all

ungrounded conductors. Contactors

have holding coils (of the same voltage

as the heater), or 120 volts or 24 volts.

Contactors are be rated at least

125 percent of heater rating and are UL

approved for 250,000 cycles.

Control Transformers

Heater are equipped with a Class 2

control transformer, sealed rating of

20 VA, to supply control circuits of 24

volts or 120 volts. (120 volt secondaries

not available in single phase heaters

over 3 kW.)

Circuit Breakers

Heaters equipped with built-in circuit

breakers in order to allow the heaters to

be supplied from feeder taps. A

separate switch providing a positive off

for control circuits are included where

required. Circuit breakers and control

switches are arranged so that all line

side conductors will be separately

enclosed when heater front is removed

for servicing so that no current-carrying

parts are accessible without the use of

additional tools.

UH-PRC003-EN46

Mechanical

Specifications

Model UHCA

Series 70 and 80

Contractor shall supply and install

heavy duty ceiling-mounted forced-air

electric heater(s) of the wattage, voltage

and phase as indicated on the plans. The

heater is designed to provide an even

distribution of heated air to the space to

be heated by drawing return air in the

periphery of the heater, across and

through the element and be discharged

from the center section of the heater by

means of an electric motor and axial

flow fan blade.

Heaters that are recessed type and

mounted flush with the finished ceiling

or surfaced mounted to extend no more

than 8 9/16” (217.5 mm) from the finished

ceiling.

Enclosure — Recessed

The return grille assembly is

constructed of a one piece heavy gauge

steel with 1/4” (6.4 mm) sq. slots for

return air and concentric rings for

uniform air discharge. Grille assembly is

attached to the chassis by

tamper- resistant (Allen head) machine

screws. All parts of enclosure are heavy

gauge steel, zinc coated both sides and

finished in neutral, off-white colored,

baked enamel.

Surface Mounted

Enclosure are constructed of 1/16”

(1.6 mm) x 3/8” (9.5 mm) rounded edge

horizontal steel louvers which are

spaced for maximum opening of 5/16”

(7.9 mm). Louvers are welded at every

intersection to evenly spaced 1/8”

(3.2 mm) diameter vertical members.

Discharge grille to have concentric rings

for uniform air discharge. Grille

assembly are attached to chassis by

tamper-resistant (Allen head) machine

screws. All parts of enclosure are heavy

gauge steel, zinc coated both sides and

finished in neutral, off- white colored,

baked enamel.

Motor

Motors are permanently lubricated, unit

bearing, totally enclosed shaded pole

type with impedance protection. Motors

operate at no more than 1,300 rpm

(21.7 RPS) and are the same voltage as

the heater.

Performance

Heaters have a rating of 425 cfm

(200.6 l/s) at 710 fpm (3606.8 mm/s)

with a maximum temperature rise of

44 F (24.4 C) and 63.9 DB RE 10-12 watt.

Elements

Element assemblies consist of

two or three corrosion-resistant,

steel- sheathed type elements

mechanically bonded to common

corrosion-resistant steel fins. Each

sheathed element consist of helically

coiled nickel chromium alloy resistant

wire completely embedded in and

surrounded by magnesium oxide,

enclosed and wedged into corrosion

resistant steel sheaths. Elements have

2” (50.8 mm) cold conductor pins

extending into sheath and have a

density of no more than 60 watts per

inch (25.4 mm).

Thermal Overload

Heaters are be equipped with a “zero

voltage reset” thermal overload which

disconnects elements and motor in the

event normal operating temperatures

are exceeded. For safety, if opened due

to abnormal temperatures, thermal

overload will remain open until

manually reset by turning heater off for

five minutes. Automatic reset thermal

overloads which allow the element to

continue to cycle under abnormal

conditions will not be accepted.

Approval

Heaters are Underwriters’ Laboratories

listed. Heaters conform to

Underwriters’ Standard 1025.

47UH-PRC003-EN

Mechanical

Specifications

Model UHAA

Series 3320

Furnish and install heavy-duty forced

air wall heaters, Series 3320 where

specified. Heaters are architectural

styled, constructed of a 18-gauge

(1.2 mm thickness) steel housing with a

14-gauge (1.9 mm thickness) extruded

aluminum frame. The rugged steel

grille and heater box are painted with a

rust resistant dark brown baked enamel

color finish. Rough-in dimensions of

19 3/16” (487.4 mm) high x 14 3/16”

(360.4 mm) wide x 4” (101.6 mm) deep.

Power wiring is connected through two

1/2” (12.7 mm) knockouts in the top of

the heater and one 1/2” (12.7 mm)

knockout on the bottom of the heater.

Units are available in ratings from 1500

to 4800 watts at 240, 208 and 277 volts

and 1500 watts at 120 volts. The

heaters have a low-speed 600 rpm (10

rps), four-pole motor which drives a

vane axial blower to deliver a quiet 175

cfm (82.6 l/s) of down flow air.

The heating element are of the sealed

tubular type with large, parallel steel fins

for quick heat transfer.

Unit’s have as standard, thermal

overload cut-off for added safety, fan

delay switch, manual tamper resistant

disconnect switch and a tamper

resistant thermostat which are

calibrated to provide a range of 55 F

(12.8 C) to 85 F (29.4 C). All items factory

installed and wired.

Optional accessories include a surface

mounting adapter and day-night relays.

All heaters are listed by Underwriter’s

Laboratories, Inc. The heating element

are supplied with a manufacturer’s

five - year limited warranty.

Trane

A Business of American Standard Companies

www.trane.com

For more information contact your local district

office or e-mail us at comfort@trane.com

Trane has a policy of continuous product and data improvement and reserves the right to change design

and specifications without notice.

Literature Order Number

File Number

Supersedes

UH-PRC003-EN

PL-UH-000-UH-PRC003-08/05

UH-PRC003-EN-12/01, UH-DS-6-04/98

Trane Electric Unit Heaters Catalogue UH PRC003 EN

Navigation menu

Versions of this User Manual:

Views

Navigation