Trane UHWA, UHAA, UHRA, UHXA, UHCA Catalogue

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Electric Unit Heaters

Model UHWA

Model UHAA

Model UHRA

Model UHCA

Model UHXA

Model UHEC

UH-PRC003-ENAugust 2005

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.

Model

UHEC 3 to 50 kW

Description

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.

Application

UHRA 3 to 48 kW

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

UHCA 2 to 5 kW

UHWA 2 to 5 kW Heavy Duty, Wall Mounted

Hose-Down, Corrosion-Resistant Electric Unit Heater

Commercial, Ceiling-Mounted Electric Unit Heater

Electric Unit Heater

Series 20 and 50

Used in industrial applications where dirt or dust may be extensive. The totally enclosed, watertight casing is corrosion-resistant for non-hazardous locations.

UHXA model may be applied where flammable gases, vapors, powdered metals or dust may be present.

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.

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.

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Contents

Introduction

Features and Benefits

Application Considerations

Selection Procedure

Model Number

General Data

Control Wiring

Dimensional Data

Options

Mechanical Specifications

4 13 14 15 19 29 32 39 42

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Features and

Electric Unit Heaters

Thirty-seven models to choose from

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ranging from 3.3 to 50 kW. Available for 208, 240/208, 277 or 480-volt operation. One unit can be used for either

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horizontal or vertical discharge. Specially designed inlet louvers, venturi

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and outlet diffuser provide uniform air temperature and throw characteristics. Single-phase units, easily converted to

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three-phase power, are available in 3.3 to 10 kW for 208 and 240-volt operation. Two-speed fan operation standard on

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25 kW units and above. Meets all requirements of UL listing

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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.

Benefits

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.

Model UHEC

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.

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.

LISTED

Casing — Die-formed heavy-gauge steel with baked enamel finish.

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.

Terminal Panel — Single-point terminal board wiring for easy control accessories installation.

Access Panel — Full width access panel secured by quarter-turn fasteners.

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Features and Benefits

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 singlepoint 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 fiveyear 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.

Model UHEC

Horizontal Discharge

Vertical Discharge

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Features and

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

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24-volt transformer and control circuit

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Three-position switch (off - heat - fan)

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Disconnect switch with enclosure

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interlock

Capillary thermostat with stainless steel

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sensor

Automatic reset thermal cutout

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Totally enclosed UL listed motor

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Pilot light (power on indicator)

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Chrome-plated finned tubular element

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Control panel on bottom of unit for ease

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of installation and service

304 Stainless Steel Casing

Plated Inlet Grille

Benefits

Control Enclosure

Single-point power connection

•

Meets all UL, NEC and OSHA

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requirements (when installed as directed)

Model UHRA

Corrosion-resistant in high humidity and

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water-saturated areas (for areas where corrosion-resistance is needed in non-hazardous areas).

Easy-mount bracket for Use with Field- Installed Hanger or Optional Mounting Brackets

Totally Enclosed Motor

Aluminum Fan Blade

Thermostat

Three-Position Fan Switch

Pilot Light (Heater Energized)

Door Interlock Disconnect Switch (Optional)

Stainless Steel Discharge Grille

Element

NEMA 4x Non-Metallic Enclosure

Control Components (24-Volt Standard)

UH-PRC003-EN6

Features and

Epoxy Coated 14-Gauge Cold Rolled Steel Cabinet

Cast Aluminum Control Enclosure with Oversized Opening

Benefits

Trane Explosion-Proof Electric Unit Heaters

Pressure Relief Valve Rated at 200 PSI

Model UHXA

Spiral Aluminum Finned Tubular Steel Heat Exchanger Core Liquid Filled Operation (see page 3)

14-Gauge Steel Adjustable Louvers with Minimum Position Stops

Built-In Load Carrying Contactor

Protective Heating Element Cover

Copper Sheathed Immersion Type Heating Element

Etched Aluminum Data Plates Riveted to Case

High Performance Aluminum Fan Blades (not shown)

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Features and Benefits

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.

Model UHXA

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

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tube heat exchanger core. Ethylene glycol water mixture used as

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heat transfer fluid in the heater core, providing -45°C, (-49°F) freeze damage protection. High-performance electric motor

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driven fan blows air across finned tubes to effect uniform heat transfer and area heat distribution. Automatic reset capillary type high limit

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provides high temperature regulation and is rated for 100,000 cycles of service. Stainless steel and aluminum pressure

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relief valve handles any over-pressure. 14-gauge steel cabinet contains heater

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core, motor and fan assembly. Narrow gap safety fan guard shields all

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moving parts. Adjustable louvers allow directional

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control of air. Copper conductor wires enclosed in

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rigid metal conduits carry all electrical power. Box lugs are furnished for field

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connections within an approved enclosure.

Heavy-duty control contactor with 24-volt control circuit provided on all models.

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Features and

Model UHWA

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.

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.

Benefits

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.

Series 20 and 50

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.

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 bladeover-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.

Series 50 with exposed thermostat knob and covered circuit breaker and control switch only

Series 20 and 50 with tamper-resistant thermostat cover plate which is included with each heater.

Series 50 with tamper-resistant cover removed.

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Features and

Model UHWA

Benefits

Series 20 and 50

Architecturally styled and

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vandal- resistant for schools, churches, stores, office buildings, transportation terminals, dormitories, hospitals. Use in vestibules, entrance ways,

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lobbies, corridors, stairways, reception rooms, rest rooms, offices. Simple application design — Wide

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selection of built-in, factory installed and wired, pre-engineered control systems. Saves design and on-the-job time. Versatile application — Higher capacity

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and wider range of voltage/phase and control systems than any similar heaters previously available. Heater front withstands with less than

•

/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.

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Features and

Model UHCA

Series 80 Recess mounted for 2’ (609.6 mm) x 2’ (609.6 mm) “T” bar or plaster ceilings

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.

Benefits

Series 70 and 80

Commercial and Industrial Ceiling - Mounted Fan Forced Heaters

Series 70 and 80 Features

Crisp, unique styling to blend into any

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architectural design — unit designed for long life and warranted for five years. Higher velocity ceiling-mounted heater

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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

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fraction of the cost of cabinet unit heaters. Five-year warranty.

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2,000 to 5,000 watts.

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208, 204 V single and three-phase.

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277 V single-phase.

UL listed and conform to Underwriters’

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Standard 1025.

Commercial and Institutional Applications

Use in vestibules, entrance ways,

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lobbies, restrooms and small office and guard building applications. A unique design offers surface and

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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

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control capabilities using accessory thermostat (see page 8).

Unit mounted controls for Series 80

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only with fan purge.

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Features and

Model UHAA

Benefits

Series 3320

Architectural Quality

Built - in tamper resistant thermostat

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Built - in tamper resistant disconnect

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switch Richly styled, rugged grille

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Whisper-quiet sound level

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Fan delay

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Decorator designed for functional

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beauty and versatility. Five-year element, limited warranty

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UL listed

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Optional Accessories

3320EX33 Surface Mounting Adapter

Factory-Installed Accessories

Suffix R Day/Night Relay

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.

UH-PRC003-EN12

Application Considerations

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

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surface operating temperature in excess of the ignition temperature of the specific gas or vapor. Class II: Equipment does not have

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surface temperature greater than the ignition temperature of the specified dust. Group D: Atmospheres such as but not

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limited to acetone, alcohol, gasoline, lacquer solvent vapors, natural gas, propane or other gases or vapors of equivalent hazard. Group E: Atmospheres containing

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combustible metal dust regardless of resistivity, or other combustible dust of similar hazard characteristics having resistivity of less than

ohm-centimeter.

10 Group F: Atmospheres containing

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carbon black, charcoal, coal or coke dust. Group G: Atmospheres containing

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combustible dust having resistivity of

ohm-centimeter or greater.

10 Division I: A location in which ignitable

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concentrations of flammable material exist under normal operating conditions. Division II: Locations in which flammable

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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 1

Refer to owner’s manual.

Model UHXA

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.

13UH-PRC003-EN

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.

UH-PRC003-EN14

Model Number

Model UHEC,

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

Description

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

UHRA, UHXA

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.

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Model Number Description

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

Model UHWA

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 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

Digit 18: Circuit Breaker

L = Unit Mounted

Digit 19: Transformer 24 Volt

M = 24V Transformer

Digit 20: Transformer 120 Volt

P = 120V Transformer

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Model Number Description

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

Model UHCA

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

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

17UH-PRC003-EN

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

Model UHAA

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

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General Data Model UHEC

Table GD-1 — Model UHEC

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 1/1 25 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

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

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 1/1 25 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 1/1 25 1550 400 40 12 9 9

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

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

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

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

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.

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

Electrical Data Air Delivery Data

7.9/6.9†

12.1/10.4†

20.8

†

18.1/15.6†

24/20.8†

19UH-PRC003-EN

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

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

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

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

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.

849 24.4 13.7 3.7 6.7

849 29.4 12.2 3.7 6.1

1321 25.0 16.8 4.6 7.3

1321 31.1 15.2 4.6 6.7

UH-PRC003-EN20

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 2 0 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 2 5 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 3 0 102,390 240/3 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. Ai r 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 2 0 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 2 5 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 3 0 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)

21UH-PRC003-EN

General Data

Model UHRA

Table GD-5 — Air Delivery Characteristics

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.

Velocity of Air Movement (FPM)

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

Table GD-6 — Air Delivery Characteristics

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.

Velocity of Air Movement (FPM)

(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

UH-PRC003-EN22

General Data

Model UHXA

Table GD-8 — Model UHXA

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

3 kW 033B1B 240/1

5 kW 051B1B 240/1

7.5 kW 071B1B 240/1

10 kW 103B1B 240/3

15 kW 153B1B 240/3

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

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.

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

031A1B 208/1 14.4 16.3 20.4 25 10 033A1B 208/3 8.3 9.8 12.3 15 14

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

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

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

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

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

253D1B 480/3

/4 12.5 14.8 10239 16.6 9.2 18.5 20 12

/4 20.8 23.1 17065 27.6 15.3 28.9 30 10

/4 31.3 33.6 25598 41.4 23.0 42.0 45 8

/4 24.1 25.5 34130 21.7 12.1 31.8 35 8

/2 36.1 38.1 51195 19.2 10.7 47.6 50 8

/2 24.1 25.1 31.3 35 8

/2 30.1 31.1 38.8 40 8

Air Temp. Air Temp. Max Min*

23UH-PRC003-EN

General Data Model UHXA

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

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

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

031A2B 208/1 14.4 16.3 20.4 25 10

3 kW 033B2B 240/1

033A2B 208/3 8.3 9.8 12.3 15 14

/4 12.5 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

5 kW 051B2B 240/1

053A2B 208/3 13.9 15.4 19.2 20 12

/4 20.8 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

7.5 kW 071B2B 240/1

073A2B 208/3 20.8 22.3 27.9 30 10

/4 31.3 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

10 kW 103B2B 240/3

101B2B 240/1 41.7 44.0 55.0 60 6

/4 24.1 25.5 34130 21.7 12.1 31.8 35 8 103D2B 480/3 (186 W) 12.0 12.7 15.9 20 12

15 kW 153B2B 240/3

153A2B 208/3 41.6 43.5 54.4 60 6

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

20 kW 203D2B 480/3 25 kW 253D2B 480/3

*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.

/2 36.1 38.1 51195 19.2 10.7 47.6 50 8

/2 (373 W) 24.1 25.1 68260 26.2 14.6 31.3 35 8

/2 (373 W) 30.1 31.1 85325 32.8 18.2 38.8 40 8

Air Temp. Air Temp. Max Min*

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

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

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

3 kW 033A3B 208/3

031A3B 208/1 14.4 16.3 20.4 25 10 208

/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

5 kW 053A3B 208/3

051A3B 208/1 24.0 26.0 32.4 35 8 208

/4 13.9 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

7.5 kW 073A3B 208/3

071A3B 208/1 36.1 38.0 47.5 50 8 208

/4 20.8 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

10 kW 101B4B 240/1

103A3B 208/3 27.8 29.3 36.6 40 8 208

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

15 kW 153A3B 208/3

/4 41.7 44.0 34130 21.7 12.1 55.0 60 6 240

/2 41.6 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.

Air Temp. Air Temp. Max Min*

UH-PRC003-EN24

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

UL Listing Class I, Group D, 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

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)

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

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

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

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

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

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

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

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

Max. 40°C, (104°F)

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

/4 (19.1 mm) rigid metal.

/8” (15.9 mm) NC tap, 2 holes.

120 volt optional on 208, 240 and 480 volt models. Line voltage on 208 and 240 volt models only.

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

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

25UH-PRC003-EN

Model UHWA

General Data

Series 20 and 50

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

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

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

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

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

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

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

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

021A2AT -400 208 1

021C2AT -404 277 1 031A2AT -406 208 1

031C2AT -410 277 1 041A2AT -412 208 1 041B2AT -414 240 1

043A2AT -418 208 3 043B2AT -420 240 3 051A2AT -422 208 1 051B2AT -424 240 1

053A2AT -428 208 3 053B2AT -430 240 3

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

Watts UHWA 2 33 + Motor Voltage Phase Lbs Kg BTU Air Rise Air Rise

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

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

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

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

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

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

021A5AT -431 208 1

021C5AT -435 277 1 031A5AT -437 208 1

031C5AT -441 277 1 041A5AT -443 208 1 041B5AT -445 240 1

043A5AT -449 208 3 043B5AT -451 240 3 051A5AT -453 208 1 051B5AT -455 240 1

053A5AT -459 208 3 053B5AT -461 240 3

UH-PRC003-EN26

Model UHCA

General Data

Series 70 and 80

Table GD-14 — Series 70 Electric Ceiling Surface Heaters

Model Order Element

Wa tt s UHCA 233 Voltage Phase Application Rating BTU Air Rise Air Rise

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

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

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

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

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

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

021A7A -300 208 1 Surface 9.6

021C7A -304 277 1 Surface 7.2 031A7A -306 208 1 Surface 14.4

031C7A -310 277 1 Surface 10.8 041A7A -312 208 1 Surface 19.2 041B7A -314 240 1 Surface 16.7

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

053A7A -328 208 3 Surface 13.9 053B7A -330 240 3 Surface 12.1

unit.

Table GD-15 — Series 80 Electric Ceiling Recessed Heaters

Model Order Element

Wa tt s UHCA 233 Voltage Phase Application Rating BTU Air Rise Air Rise

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

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

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

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

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

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

021A8A -331 208 1 Recessed 9.6

021C8A -335 277 1 Recessed 7.2 031A8A -337 208 1 Recessed 14.4

031C8A -341 277 1 Recessed 10.8 041A8A -343 208 1 Recessed 19.2 041B8A -345 240 1 Recessed 16.7

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

053A8A -359 208 3 Recessed 13.9 053B8A -361 240 3 Recessed 12.1

27UH-PRC003-EN

Model UHAA

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.

Series 3320

UH-PRC003-EN28

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

Single Phase Heater

with 24 Volt Control

L2 L1

Single Phase Heater

with 120 Volt Control

WD1

WD3 WD4

600 volts. They meet stringent UL requirements. However, it is essential that correct installation procedures be

24 Volt Control

WD1 – Single Phase

208, 240 Volt

WD2 – Three Phase

208, 240, 480 Volt

Three Phase Heater with 24 Volt Control

WD2

120 Volt Control

WD3 – Single Phase

208, 240 Volt

WD4 – Three Phase

208, 240, 480 Volt

Three Phase Heater

with 120 Volt Control

followed to eliminate all potential hazards arising from faulty installation.

Single Phase Heater Line Voltage Control

208V or 240V Models

Only

600 Volt Three Phase Heater with 24 Volt Control

WD5

WD7

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

Three Phase Heater

Line Voltage Control

208V or 240V Models

Only

WD6

600 Volt

Three Phase Heater

with 120 Volt Control

WD8

29UH-PRC003-EN

Model UHWA

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

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

/4”

(57.2 mm).

20 EX 8 Extension sleeve for

extending front additional 1” (25.4 mm) from finished wall. Heater recesses 3

/4”

(82.6 mm).

20 Box Must be used on all heater

installations.

Series 20 and 50

50 Series

50 EX 34 Extension sleeve for full

50 EX 16 Extension sleeve for

50 EX 8 Extension sleeve for

50 Box Must be used on all heater

surface mounting.

extending front additional 2” (50.8 mm) from finished wall. Heater recesses 2

/4”

(57.2 mm).

extending front additional 1” (25.4 mm) from finished wall. Heater recesses 3

/4”

(82.6 mm).

installations.

on all three-phase heaters, up to

3000 watts on 208 and 240V,

one - phase and up to 4000 watts on

277V, 1-phase.

UH-PRC003-EN30

Model UHCA

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.)

Series 70 and 80

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.

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

Fan purge (off delay to dissipate residual heat on shut off) supplied as a standard control on heaters with factory installed options.

31UH-PRC003-EN

Dimensional

Unit Casing

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)

Data

Horizontal Air Discharge Vertical Air Discharge

Model UHEC

Weld-Nut Location Dimensions, Inches (mm)

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)

Horizontal Vertical

Horizontal Air Discharge

HEATER

All dimensions approximate. Certified prints available on request.

CEILING

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.

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.

UH-PRC003-EN32

Dimensional Data

Vertical Air Discharge

Model UHEC

Louver Cone Diffuser

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)

33UH-PRC003-EN

Dimensional Data

3 kW thru 15 kW

Model UHRA

Dimensions shown in ( ) are in millimeters

20 kW thru 48 kW

Unit Size A B C D E F G H

03,05,07 12” (305) 18” (457) 19 3/4” (502 15 1/4” (387) 16 1/2” (419) 6 Ft. (1.8 M) 8” (203) 6” (152)

10,15 14” (356) 19” (483) 21 3/4” (552) 15 1/4” (387) 18” (457) 6 Ft. (1.8 M) 8” (203) 6” (152)

20,25,30 16” (406) 27” (686) 28 3/4” (730) 19 1/2” (495) 17 1/2” (445) 6 Ft. (1.8 M) 15 1/2” (394) 4 1/2” (114)

40,48 18” (457) 31” (787) 30 3/4” (781) 19 1/2” (495) 19 1/2” (495) 6 Ft. (1.8 M) 21 3/4” (552) 2 3/4” (70)

Dimensions, in. (mm)

UH-PRC003-EN34

Dimensional Data

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”

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)

Dimensions shown in ( ) are in millimeters

Model UHXA

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

/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 (102 mm) O.D. — not supplied].

/2” (89 mm) pipe [4”

HLWM Wall Mounting Bracket

Ideal for use in buildings that have substantial walls. Arm only can also be bolted directly to structural steel.

35UH-PRC003-EN

Dimensional

Model UHWA

Dimensions shown in are inches (mm)

Data

Series 20 and 50

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

Control System Wiring Diagrams

UH-PRC003-EN36

Dimensional

Model UHCA

Series 70 — Surface Mounted

Note: Dimensions shown in in inches (mm)

Data

Series 70 and 80

Series 70 — Surfaced Details

Series 80 — Recessed Mounted

37UH-PRC003-EN

Dimensional

Model UHAA

Dimensions are shown in inches (mm)

Data

Series 3320

UH-PRC003-EN38

Options Model UHEC

Dust Shield

Horizontal

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

Heater and

OSHA Fan Guards

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

Accessory Fan Guard Installation

thermostat allows the fan to operate without energizing the heating element. Recovering this otherwise wasted heat assures substantial energy savings.

Diffuser Options

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

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 1 0’ (3.0 M ) 3 0’ (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 1 7’ (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

Model Diffuser

39UH-PRC003-EN

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 summerfan 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.

Options

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.

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

UH-PRC003-EN40

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.

41UH-PRC003-EN

Mechanical Specifications

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.).

OSHA Fan Guards - Optional

Model No. Unit Size of Holes Edge Di men sio n OFG-5101 2-5 kW 4 OFG-5102 7-20 kW 4 OFG-5103 25-50 kW 4

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.

Number Dim. From Center to Center

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. Builtin 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.

/4" (6.4 mm) 3 3/4" (95 mm)

/4" (6.4 mm) 4 3/4" (121 mm)

Model UHEC

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

UH-PRC003-EN42

Mechanical Specifications

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

Model UHRA

(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 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 (nonhazardous) 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.

43UH-PRC003-EN

Mechanical

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 10 centimeter. Group F: Atmospheres containing

•

carbon black, charcoal, coal or coke dust. Group G: Atmospheres containing

•

combustible dust having resistivity of

ohm-centimeter or greater.

10 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.

ohm-

Specifications

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 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 2 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.

/4” (6.4 mm) spacing

/8” (16

Model UHXA

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,

/4 HP (559 W) @ 125 VAC,

VAC. Explosion-proof thermostat

•

(wall- mounted) - DPST 40°F (4.4°C) 90°F(32.2°C) 22 amps, 125-277 VAC,

/4 hp (559 W) @ 125 VAC, 1 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 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 3 (101.6 mm) OD supplied by others.

/2 hp (1119 W) @ 250-277

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

/2” (12.7 mm) pipe, cut and

/2” (88.9 mm) schedule 40 pipe 4”

UH-PRC003-EN44

Mechanical

Model UHWA

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 finished wall, surface mounted to extend no more than 5 from the finished wall or semi-recessed to extend no more than 2 from the finished wall.

Enclosure

Heater front can withstand, with less than 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 mm) x horizontal steel. Louvers are spaced for maximum opening of Louvers are welded at every intersection to three evenly spaced (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.

/2” (38.1 mm) from the

/4” (146.1 mm)

/2” (63.5 mm)

/16” (1.6 mm) permanent

/8” (9.5 mm) rounded edge

/4” (6.4 mm).

/16” (1.6

/16”

Specifications

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.

Series 20 and 50

Heaters with built-in, pre-wired contactors (and control transformers) will be operated from wall-mounted, pilot duty (24 V) or (120 V) wallmounted 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.

45UH-PRC003-EN

Mechanical

Model UHCA

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

/16” (217.5 mm) from the finished

than 8 ceiling.

Enclosure — Recessed

The return grille assembly is constructed of a one piece heavy gauge steel with 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.

/4” (6.4 mm) sq. slots for

Specifications

Surface Mounted

Enclosure are constructed of (1.6 mm) x 3/8” (9.5 mm) rounded edge horizontal steel louvers which are spaced for maximum opening of (7.9 mm). Louvers are welded at every intersection to evenly spaced (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.

/16”

/8”

/16”

Series 70 and 80

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.

UH-PRC003-EN46

Mechanical

Model UHAA

Specifications

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

/16” (487.4 mm) high x 14 3/16”

19 (360.4 mm) wide x 4” (101.6 mm) deep. Power wiring is connected through two

/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.

Series 3320

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.

47UH-PRC003-EN

Trane A Business of American Standard Companies www.trane.com

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

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.

Trane UHWA, UHAA, UHRA, UHXA, UHCA Catalogue

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