BRANT RADIANT UH User Manual

Detroit Radiant Products Company

UH Series Manual

Installation, Operation,

Maintenance and Parts

The UH Series heater is a gas-ﬁred unit heater. This manual provides speciﬁc information related to the UH Series models. All persons involved with the installation, operation and maintenance of the heater system must read and understand the information in this manual.

Improper installation, adjustment, alteration, service or maintenance can cause property damage, serious injury or death. Read and understand the installation, operating and maintenance instruction thoroughly before installing or servicing this equipment.

This heater must be installed and serviced by trained gas installation and service personnel only. Failure to comply could result in personal injury, asphyxiation, death, and ﬁre or property damage.

Do not store or use gasoline or other ﬂammable vapors and liquids in the vicinity of this or any appliance.

Do not use this heater in indoor living or sleeping quarters! Installation of this unit in a residential indoor living space may result in property damage, serious injury, asphyxiation or death.

For Your Safety

If you smell gas:

• Open windows.

• Do not touch any electrical switch.

• Extinguish any open ﬂame.

• Do not use any phone in your building.

WARNING

• Immediately call your gas supplier from a neighbor’s phone.

• Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the ﬁre department.

INSTALLER: Present this manual to the end user.

Keep these instructions in a clean and dry place for future reference.

Model#: ___________________ Serial #: _________________________

(located on rating label)

LIOUH-Rev. 05313

Print: 1M-8/13_r2-5/14 (CDS)

Table of Contents

UH Series

Contents

1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Overview ...................................................................... 3

Heater Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Initial Installation Considerations and Pre-Checks ...................................... 4

Product Speciﬁcations ........................................................... 5

Safety Labels and Their Locations .................................................. 6

2.0 Safety . . ................................................................... 8

Warning Symbols ............................................................... 8

Applications ................................................................... 9

Standards, Certiﬁcations and Government Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Clearance to Combustibles ....................................................... 12

3.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Conﬁguring the Support Brackets................................................... 13

Hanging the Unit Heater .......................................................... 14

Suspending the Unit Using Lag Bolts/Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Suspending the Unit by Threaded Rod............................................... 14

Pre-Conﬁguration for 180° Installation ............................................... 15

Rotated 180° Installation .......................................................... 15

Rotating the Air Louvers .......................................................... 16

Rotating the Service Access Door Panel Handle ....................................... 16

Recommended Mounting Heights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Gas Supply Installation Instructions ................................................. 17

Leak Testing ................................................................... 20

Electrical Requirements and Wiring Diagrams ......................................... 21

Internal Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Field Wiring Supply Voltage ....................................................... 22

Thermostat Connection .......................................................... 24

Thermostat Location ............................................................. 25

Venting ....................................................................... 26

Replacing Existing Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

General Venting Requirements..................................................... 27

Vertical Venting (Category I)....................................................... 29

Horizontal Venting (Category III).................................................... 30

Common Venting (Category I) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Concentric Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Combustion Air Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Separated Combustion Systems ................................................... 34

Room Air Combustion Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Unit Start-Up (Commissioning)..................................................... 37

Pre-Start Up Checks............................................................. 37

Verify Proper Inlet Pressure ....................................................... 38

Verify Manifold Pressure .......................................................... 39

Prior to leaving the Job Site ....................................................... 40

High Altitude Operation........................................................... 41

4.0 Operation ................................................................... 43

Sequence of Operation........................................................... 43

Shutdown Procedures............................................................ 44

Troubleshooting Guide ........................................................... 46

5.0 Maintenance................................................................. 50

Limited Warranty Terms and Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Heater Assembly Components and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Kit Contents ................................................................... 56

UH Series

1.0 Introduction • Overview • Heater Components

1.0 Introduction

Overview

The intent of this manual is to provide information regarding safety, design guidelines, installation, operation and maintenance of the UH Series gas-ﬁred unit heater. You must read and understand the instructions and all safety warnings before installing the gas-ﬁred unit heater. This manual is property of the owner, and must stay with the owner or unit after installation is complete.

Heater Components

Prior to installation, verify that the heater’s gas type and voltage (as listed on the rating plate) match that of your application. Also verify that you have received the entire heater contents included with your unit. Refer to page 56 for a list of the kit contents for your heater. Materials not included with the unit (e.g. screws, vent material, threaded rod, etc.) are the responsibility of the installer. Notify your product representative or the factory of any discrepancy of missing items prior to installing the unit.

Figure 1.1 • Heater Subcomponents

Gas Valve

Draft

Inducer

Pressure

Switch

Rollout

Switches

Flame

Louvers

Flame Sensor

High Limit Switch

Spark Igniter

Control

Transformer

Direct Spark Igniter Board

1.0 Introduction • Initial Considerations and Pre-Checks

UH Series

Initial Installation Considerations and Pre-Checks

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, serious injury or death. Read and understand the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment. Only a trained, qualiﬁed installation or service personnel may install or service this equipment.

Placement of the heater is inﬂuenced by many factors. Aside from safety factors, considerations for the general space and heating requirements, availability of gas and electrical supply, and proximity of possible vent locations are a few examples of factors that should all be considered.

Inspect and evaluate the location of the heater to ensure that the structural support is adequate to support the unit’s weight. The unit must be installed in a horizontally level position to ensure proper operation. To reduce noise attenuation along the structure caused by vibration of the unit, the heater should be installed within 15 feet of a primary building support. In the cases where this installation is not practical or feasible, the use of spring vibration isolators may be used, so long as they are rated for use of the unit’s weight (see Chart 1.1).

Adequate space around the heater must also be considered in order to maintain the published minimum clearance to combustibles and recommended service clearances.

When designing a unit heater system, consider the following:

• Has the building’s heat loss been evaluated?

• Does the design meet the needs of the space?

• Have the recommended mounting heights been observed?

WARNING

Do not locate any gas-ﬁred units in area where chlorinated, halogenated, or acid vapors are present in the atmosphere. These substances can cause premature heat exchanger failure due to corrosion, which can cause property damage, serious injury or death.

UH Series

1.0 Introduction • Product Speciﬁcations

Product Speciﬁcations

The UH Series unit heater is a single input warm air heater with an average thermal efﬁciency of 80%, unless otherwise indicated on the rating label. All units are to be supplied with single-phase 60 Hz 120VAC power. The exterior of all models are ﬁnished with industrial-grade colored enamel. For speciﬁc information on each model, see Chart 1.1, below.

Chart 1.1 • Speciﬁcations

Model Number

UH-30

UH-45

UH-60

UH-75

Cabinet Number

Gas Type

Nat

or LP

Nat

or LP

Nat

or LP

Nat

or LP

BTU/h Input

30,000 24,000

45,000 36,000

60,000 48,000

75,000 60,000

BTU/h Output

Physical

28” W

17” D 12” H

28” W

17” D 12” H

28” W

17” D 17” H

28” W

17” D 17” H

Dimensions

Standard Weight

Lbs.

Recommended

8'-12'

8'-14'

10'-16'

10'-18'

Mounting Height*

Gas Connection

1/2"

NPT

1/2"

NPT

1/2"

NPT

1/2"

NPT

Vent Connection

Inlet Connection

3” 3” CCW

4” 4” CCW

Axial Fan Rotation

120

VAC

120

VAC

120

VAC

120

VAC

Primary Voltage

Thermostat

Voltage

VAC

* Recommended mounting heights are provided as a guideline. Actual conditions may dictate variations from the above data. Clearance to combustibles must always be maintained.

Figure 1.2 • Dimensional Data (see Chart 1.1 for Physical Dimensions)

Top View

ReaR View

1.0 Introduction • Safety Labels and Their Locations

UH Series

Safety Labels and Their Locations

Product safety signs or labels should be replaced by the product user when they are no longer legible. Contact either your local distributor or product manufacturer for obtaining replacement signs or labels.

F/N: LLUH003 - Mounting Notice

Front View

Rear View

F/N: LLV3EP6 - Gas Valve and

Pressure Switch Operation

SEPARATED COMBUSTION SYSTEM UNIT HEATER

MODEL NUMBER

NUMÉRO DE MODÈLE

TYPE OF GAS

TYPE DE GAZ

HEAT INPUT

DEBIT CALORIFIQUE

HEAT OUTPUT

REDENMENT

VENT CATAGORY

ÉVENT CATÉGORIE

THIS DESIGN COMPLIES WITH UNIT HEATER STANDARD:

ANSI Z83.8b-2006 • CSA2.6B-2006 UNIT HEATER

TOP

HAUT

DETROIT RADIANT PRODUCTS COMPANY 21400 HOOVER ROAD - WARREN, MI 48089 (586) 756-0950 - www.drp-co.com

AÉROTHERME À SYSTÈME DE COMBUSTION ISOLÉ

SERIAL NUMBER

NUMÉRO DE SÉRIE

UH-30N

NATURAL

30,000 24,000

CATAGORY III

DÉGAGEMENT MINIMUM POUR MATIÉRES COMBUSIBLES

RIGHT SIDE

BOTTOM

BAS

COTÉ DROIT

INCH

1 1 1 6

YYMMREPCSHIPPE#### 09/12

MANIFOLD PRESSURE

PRESSION A LA TUBULURE D'ALIMENTATION

MAXIMUM INLET PRESSURE

PRESSION D'ALIMENTATION MAXIMALE

BTU/h

MINIMUM INLET PRESSURE FOR PURPOSE OF ADJ.

PRESSION D'ALIMENTATION EN GAS MIN. ADMISE

BTU/h

ORIFICE SIZE

DIM DE L'INJECTEUR

SAMPLE

MINIMUM CLEARANCE TO COMBUSTIBLE MATERIAL

LEFT SIDE

COTÉ GOUCHE

INCH INCH INCH INCH

INCHES W.C.

14.0

INCHES W.C.

5.0

NATURAL GAS PROPANE GAS

D.M.S. D.M.S.

VENT CONNECTOR

CONNECTEUR D'AERATION

FOR COMMERCIAL / INDUSTRIAL USE.

FOR INDOOR USE ONLY.

VOLTAGE

AMPS

PHASE

FREQUENCY

LABEL REVISION

MADE IN U.S.A.

SERVICE ACCESS

COTÉ ACCÉDEZ

Rating Label (located inside of panel)

VERSION

1203.5

2.4

SINGLE

VAC

F/N: LLUH005 Vent Out

F/N: LLUH004 Air In

UH Series

1.0 Introduction • Safety Labels and Their Locations

F/N: LLWUH001 - Wiring Diagram

F/N: LLUH006 UH Vent Length Notice

F/N: LLUHCL001 For Your Safety

Service Access Door View

(Inside View)

F/N: LLUH001 - LED Status

2.0 Safety • Warning Symbols

UH Series

2.0 Safety

Read and understand all safety information and warnings in this manual prior to installation, operation, and maintenance of this unit heater. Warnings indicate a potentially hazardous situation which, if not avoided, could result in death or injury.

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, serious injury or death. Read and understand the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment. Only trained qualiﬁed gas installation and service personnel may install or service this equipment.

Warning Symbols

Safety is the most important consideration during installation, operation and maintenance of the unit heater. You will see the following symbols and signal words when there is a hazard related to safety or property damage.

CAUTION

NOTICE

Warning indicates a potentially hazardous

situation which, if not avoided, could result in death or injury.

Caution indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.

Notice indicates a potentially hazardous situation which, if not avoided, could result in property damage.

UH Series

2.0 Safety • Applications

Applications

This is not an explosion proof heater. This heater may not be used in a Class 1 or Class 2 Explosive Environment. Consult your local Fire Marshall, insurance carrier and other authorities for approval if the proposed installation is in question.

Residential Garages

The UH Series unit heater is designed and approved for use in residential garage applications or non-conﬁned living space applications. If installed in a residential application, the unit must be installed higher than 18 inches above the ﬁnished ﬂoor when measuring from the bottom of the unit. In addition, the heater must be located or protected to avoid physical damage by vehicles.

WARNING

This unit is not to be used as a central heating furnace. This unit is not designed for connecting to a ductwork system. Installing restrictive devices of the inlet or outlet air discharge may result in premature failure of the exchanger pipe, overheating of the appliance, or damage to the components.

Commercial / Industrial

The UH Series unit heater is designed and certiﬁed for use in industrial and commercial buildings, such as warehouses, manufacturing plants, aircraft hangars, and vehicle maintenance shops. For maximum safety, the building must be evaluated for potential problems before installing the heater system. This unit is certiﬁed for use as furnished by the manufacturer. Do not alter the fan or operate motors at a reduced speed.

CAUTION

Installation of restrictive devices to the inlet or outlet of the fan motor may result in premature failure of the exchanger pipe, overheating of the appliance, or damage to the components. Do not attach ductwork, air ﬁlters, or poly-tubes to any UH Series unit heater.

2.0 Safety • Standards, Certiﬁcations and Government Regulations

UH Series

Standards, Certiﬁcations and Government Regulations

Installation of this gas-ﬁred heater must conform with all applicable local, state and national speciﬁcations, regulations and building codes. Contact the local building inspector and/or Fire Marshall for guidance.

In the absence of local codes, the installation must conform to the latest edition of:

United States: National Fuel Gas Code, ANSI Z223.1 (NFPA 54). Canada: CAN/CGA B149.1 and .2, Canadian Electrical Code C22.1

Copies of these Standards can be viewed or purchased at www.nfpa.org or www.scc.ca.

Chart 2.1 • Standard and Code Installation Guidelines • Building Type

Building

Type

Public

Garages

Aircraft

Hangars

Codes and Guidelines

Installation of this heater in public garages must conform to the following codes:

United States: Standard for Parking Structures NFPA 88A (latest edition) or the Code for Motor Fuel Dispensing Facilities and Repair Garages NFPA 30A (latest edition).

Canada: Refer to CAN/CGA B149.1: Installation Codes for Gas Burning Appliances and applicable Standards for Public Garages.

Guidelines:

• Heaters must not be installed less than 8 ft. (2.4 m) above the ﬂoor. Minimum clearances to combustibles must be maintained from vehicles parked below the heater.

• When installed over hoists, minimum clearances to combustibles must be maintained from the upper most point of objects on the hoist.

Installation of this heater in aircraft hangars must be in accordance with the following codes:

United States: Refer to Standard for Aircraft Hangars, ANSI/NFPA 409 (latest edition).

In Canada: Refer to Standard CAN/CGA B149.1 and applicable Standards for Aircraft Hangars.

Guidelines:

• In aircraft storage and servicing areas, heaters shall be installed at least 10 ft. (3 m) from above the upper surface of wings or of the engine enclosures of the highest aircraft that may be housed in the hangar. The measurement shall be made from the wing or engine enclosure, whichever is higher from the ﬂoor, to the bottom of the heater.

• In areas adjoining the aircraft storage area (e.g., shops, ofﬁces) the bottom of heaters shall be installed no less than 8 ft. (2.4 m) above the ﬂoor.

• Suspended or elevated heaters shall be located in spaces where they shall not be subject to damage by aircraft, cranes, movable scaffolding or other objects.

Provisions shall be made to assure accessibility to suspended heaters for recurrent maintenance purposes.

UH Series

Chart 2.2 • Standard and Code Installation Guidelines • Building Location

2.0 Safety • Standards, Certiﬁcations and Government Regulations

Building

Location

High

Altitude

Non-

Standard

BTU Gas

Chart 2.3 • Standard and Code Installation Guidelines • Building Aspect

Building

Aspect

Electrical

Guidelines

Installation of this heater is approved, without modiﬁcations, for elevations up to 2,000 feet (610 m) above MSL (sea level) in the United States. For elevations above 2,000 feet, the heater input must be derated. See page 41 for details on how to derate.

The type of gas appearing on the nameplate must be the type of gas used. Installation must comply with national and local codes and requirements of the local gas company.

Guidelines:

Unless otherwise noted on the rating plate, this heater is designed and oriﬁced to operate on standard BTU gas. Contact the factory if utilizing non-standard BTU gas.

Codes and Guidelines

The heater must be electrically grounded in accordance with the following codes:

United States: Refer to National Electrical Code Wiring must conform to the latest edition of National Electrical Code®, local ordinances, and any special diagrams furnished.

Guidelines

, ANSI/NFPA 70 (latest edition).

Canada: Refer to Canadian Electrical Code CSA C22.1 Part 1 (latest edition).

Venting

Applicable authorities governing the manufacturing or installation of this unit here include (but are not limited to) the following organizations:

In the United States:

• NFPA 54 / ANSI Z223.1 – National Fuel Gas Code.

• ANSI Z83.8 / CSA 2.6 – Gas Unit Heater Construction Standard.

• ANSI/NFPA 70 - National Electric Code.

In the Canada:

• CAN/CGA B149.1-10 – Natural Gas and Propane Installation Code.

• ANSI Z83.8 / CSA 2.6 – Gas Unit Heater Construction Standard.

• C22.1 Part 1 – Canadian Electrical Code.

Venting must be installed in accordance with the requirements within this manual and the following codes:

United States: Refer to NFPA 54/ANSI Z223.1 (latest edition), National Fuel Gas Code.

Canada: Refer to CAN/CGA B149.1 Installation Codes for Gas Burning Appliances.

2.0 Safety • Clearance to Combustibles

UH Series

Clearance to Combustibles

Clearance to combustibles is deﬁned as the minimum distance that must exist between the speciﬁed feature of the heater, and any combustible items. It also pertains to the distance that must be maintained from moving objects around the unit heater. A recommended service clearance is deﬁned as the minimum distance that is needed to properly service the heater. When installing the unit heater, clearances to combustible for the model heater must be maintained. Refer to Chart 2.4 to determine the required distances for your model.

WARNING

Placement of explosive objects, ﬂammable objects, liquids and vapors close to the heater may result in explosion, ﬁre, property damage, serious injury or death. Do not store or use explosive objects, liquids or vapor in the vicinity the heater.

Chart 2.4 • Clearances to Combustible Materials (in Inches) Residential Models

Top and

Unit Side Front

Clearance to Combustibles

Clearance to Allow Service

60 1 18 1 1 6

60 1 18 1 18 6

Bottom

Figure 2.1 • Clearance to Combustibles Diagram

FRONT VIEW

Top

Access

Side

Bottom

Access

Side

Vent

Connection

Non-Access Side

Non-Access

Side Rear

Rear

Vent

Connection

SIDE VIEW

Top

Front

Bottom

UH Series

3.0 Installation • Conﬁguring the Support Brackets

3.0 Installation

NOTICE

High humidity or saltwater atmospheres will accelerate heater corrosion and reduce useful life. Do not install the heater in locations where water (in the form of rain, drips, or spray) could fall onto the gas ignition components.

WARNING

Improper suspension of the unit heater may result in collapse and being crushed. Always suspend from a permanent part of the building structure that can evenly support the total force and weight of the heater.

Failure to maintain minimum clearance to combustibles may result in ﬁre and/ or explosion, property damage, serious injury or death. Always maintain minimum clearances.

The unit is shipped ready for installation. The unit may be installed as shown in Figure 3.3 or inverted 180° depending on the desired location as governed by clearances, vent connection locations, air direction, gas supply, electrical supply, and service accessibility. The standard installation is installed how it was factory conﬁgured, with the controls on the left side of the heater (when looking at the front).

Conﬁguring the Support Brackets

Standard Installation (Control Panel is on the Left Side)

1 For standard control access, remove the four (4) #10 sheet metal screws and mounting bracket

along the top edge of both the front and back of the unit.

2 Install the front bracket as shown in Figure 3.1 by aligning the screw holes on the bracket with the

screw holes on top of the edge of the unit.

3 Repeat this process for the opposite bracket on the back panel.

Figure 3.1 • Support Brackets

Mounting

Bracket

Mounting Bracket

Sheet Metal Screws

3.0 Installation • Hanging Heater • Suspending Unit with Lag Bolts/Screws or Threaded Rod

UH Series

Hanging the Unit Heater

To ensure proper operation, the heater must be installed in a level horizontal position. The units are designed to be hung from the brackets (supplied) and must be ﬁeld conﬁgured prior to hanging the unit.

The mechanism that suspends the heater from the brackets (e.g. lag screws, threaded rod, or threaded pipe) must be adequate to support the weight of the unit (see page 5 for unit weights).

Suspending the Unit Using Lag Bolts/Screws

Determine the desired mounting points, and mark the locations for reference.

Using the hole spacing diagram (Figure 3.2), mark and prepare the structure mounting surface. If

necessary, weld blocks, drill holes, or install additional bracketing or steel channel.

NOTE: When bolting the unit directly to a wood truss, the recommended hardware is ¼”x 1-1/2” (minimum) lag bolts with ½” washers. The unit must be supported by a minimum of four (4) suspension points. Brackets are slotted to accommodate joists on 16 inch or 24 inch centers.

Raise the unit heater to the mounting location and secure it to the building structure using the

selected hardware. Ensure that the lag bolts are not stripped and are properly bearing the load of the unit heater.

1 inch angle mounting brackets are slotted to accommodate joists on 16 inch or 24 inch center lines.

Figure 3.2 • Mounting Bracket Hole Spacing Diagram (in Inches)

0.54

0.45 .00

.00

1.3 0

0.50

4.45

2.88

6.03

9.18

7.6 0

10.50

13.91

12.33

17. 0 6

15.73

18.63

20.21

21.78

23.36

25.73

24.93

Suspending the Unit by Threaded Rod

Determine the desired mounting points, and mark the locations for reference.

Using the hole spacing diagram (Figure 3.2) mark and prepare the structure mounting surface. If

necessary, weld blocks, drill holes, or install additional bracketing or steel channel.

NOTE: The recommended hardware is 3/8”–16 threaded rod. The unit must be supported by a minimum of four (4) suspension points.

Fasten beam clamp, screw hook, turnbuckle, steel channel, or other anchoring device to the

suspension points.

Determine the desired mounting height. Cut four Pieces of 3/8” -16 threaded rod of equal length in

which the heater will be hung. Ensure that the threads are not damaged during the cutting process.

Attach the threaded rod to the unit mounting brackets, securing with a top and bottom nut. A lock

washer is preferred, or a secondary jam nut may also be used.

UH Series

Attach threaded rod to prepared anchoring device. Adjust the threaded rod until the unit is level and

equal weight distribution is achieved. The threaded rod must be perpendicular with the unit heater. Do not install threaded rods at an angle, as this can result in weakened structural integrity or undue noise.

Figure 3.3 • Threaded Rod Support - Rear View

3.0 Installation • Rotated 180° Installation

Support Rods

Pre-Conﬁgurations for 180° Installation

Prior to installing the heater in an inverted position of 180° from the standard conﬁguration, a few items must be conﬁgured to accommodate this installation.

Rotated 180° Installation (Control Panel is on the Right side)

For 180° installations, remove the four (4) #10 sheet metal screws and mounting brackets along

the top edge of both the front and back of the unit.

Reinstall the screws into the panel, without attaching the brackets.

Along the opposite edge, remove the four (4) corresponding #10 sheet metal screws and afﬁx the

brackets to the unit (the side that was originally the bottom now becomes the top.)

Proceed with suspending the unit normally as described here in the manual.

3.0 Installation • Rotating Air Louvers and Service Door Handle • Recommended Mounting Heights

UH Series

Rotating the Air Louvers

Remove the spring loaded air louvers from the front by compressing the spring, and swinging out

the louver from the mounting holes. Take care not to lose the spring.

Turn the louvers 180°, and insert the spring end in ﬁrst. Compress the spring and swing in the other

end until it is securely in the correct mounting hole.

Adjust the louver direction so that they are in the desired position to direct the heated air downward

towards the ﬂoor. The louvers should not be adjusted beyond 60°.

Rotating the Service Access Door Panel Handle

1 Remove and retain screws securing the service access door.

2 Remove the two (2) screws holding the handle in place, and rotate the handle 180°. Secure

handle in new position with retained screws.

3 Reinstall the service access door, positioning the sight glass in line with the burners. The

handle should now taper up towards the new top of the unit.

Recommended Mounting Heights

Chart 3.1 • Recommended Mounting Heights*

Typical

Model

UH-30

UH-45

UH-60

UH-75

* Recommended mounting heights are provided as a guideline. Actual conditions may dictate variations from the above data. Clearance to combustibles must always be maintained.

The recommended mounting heights of the units are critical to its performance. Refer to the Chart 3.1 for speciﬁc recommended mounting heights. The mounting height is measured from the ﬁnished ﬂoor to the bottom of the unit. Units that are mounted higher than the recommended mounting heights may not directly deliver heated air to the ﬂoor level.

Mounting Height

8 to 12 Ft. 26 Ft. 45°F

8 to 14 Ft. 28 Ft. 45°F

10 to 16 Ft. 37 Ft. 45°F

10 to 18 Ft. 39 Ft. 45°F

Approximate

Heat Throw

Average Air

Temperature Rise

UH Series

3.0 Installation • Gas Supply Installation Instructions

Gas Supply Installation Instructions

The gas supply to the unit heater must be connected and tested in accordance with national, state, provincial, and local codes along with guidelines in this manual. In the United States refer to the latest edition of the ANSI Z223.1 (NFPA54) Standard and in Canada refer to the latest edition of the CAN/ GCA B149.1 Standard.

Supply gas piping to the unit should conform with the local and national requirements for type and volume of gas handled, and pressure drop allowed in the line. Avoid pipe sizes smaller than 1/2”.

WARNING

Improperly connected gas lines may result in serious injury and death, explosion, poisonous fumes, toxic gases or asphyxiation. Connect gas lines in accordance to national, state, provincial and local codes.

Gas pressure to the appliance controls must never exceed ½” PSI (14” W.C.). Damage to the controls may result.

CAUTION

Gas lines should be purged of air as described in ANSI Z223.1 (NFPA 54) or CSA-B149.1– latest version. Installation of the piping must also conform with the local building codes, or in the absence of local codes, with the latest edition of the National Fuel Gas Code (NFPA 54). In Canada, installation must be in accordance with CSA-B149.1

NOTICE

The total input to the appliance must fall within +/- 5% of the rated input as indicated on the rating plate. Otherwise the heat exchanger may prematurely fail.

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