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Detroit Radiant Products Company
UH Series
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.
INSTALLER: Present this manual to the end user.
Keep these instructions in a clean and dry place for future reference.
Model#: ___________________ Serial #: _________________________
Manual
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.
(located on rating label)
Installation, Operation,
Maintenance and Parts
LIOUH-Rev. 05313
Print: 1M-02/13 (DRP)
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Table of Contents
Related Manuals for Detroit Radiant Products UH-30
Summary of Contents for Detroit Radiant Products UH-30
- Page 1 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.
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Page 2: Table Of Contents
Series Table of Contents Contents 1.0 Introduction ..............3 Overview . -
Page 3: Introduction
Series Introduction • Overview • Heater Components 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. -
Page 4: Initial Installation Considerations And Pre-Checks
Introduction Series • Initial Considerations and Pre-Checks 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. -
Page 5: Product Specifications
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 28” W 1/2" UH-30 30,000 24,000 17” D 8'-12' 3” 3”... -
Page 6: Safety Labels And Their Locations
COTÉ ACCÉDEZ INCH INCH INCH INCH INCH INCH DETROIT RADIANT PRODUCTS COMPANY FOR COMMERCIAL / INDUSTRIAL USE. 21400 HOOVER ROAD - WARREN, MI 48089 FOR INDOOR USE ONLY. MADE IN U.S.A. (586) 756-0950 - www.drp-co.com Rating Label (located inside of panel) - Page 7 Series Introduction • Safety Labels and Their Locations F/N: LLUHCL001 F/N: LLWUH001 - Wiring Diagram For Your Safety Service Access Door View (Inside View) F/N: LLUH006 UH Vent Length Notice F/N: LLUH001 - LED Status...
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Page 8: Safety
Safety Series • Warning Symbols 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. -
Page 9: Applications
Series 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. -
Page 10: Standards, Certifications And Government Regulations
Safety Series • Standards, Certifications and Government Regulations 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. - Page 11 Series Safety • Standards, Certifications and Government Regulations Chart 2.2 • Standard and Code Installation Guidelines • Building Location Building Guidelines Location High Guidelines Altitude 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.
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Page 12: Clearance To Combustibles
Safety Series • Clearance to Combustibles 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. -
Page 13: Installation
Series Installation • Configuring the Support Brackets 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. -
Page 14: Hanging The Unit Heater
Installation Series • Hanging Heater • Suspending Unit with Lag Bolts/Screws or Threaded Rod 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. -
Page 15: Pre-Configuration For 180° Installation
Series Installation • Rotated 180° Installation 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. -
Page 16: Rotating The Air Louvers
Recommended Mounting Heights Chart 3.1 • Recommended Mounting Heights* Typical Approximate Average Air Model Mounting Height Heat Throw Temperature Rise UH-30 8 to 12 Ft. 26 Ft. 45°F UH-45 8 to 14 Ft. 28 Ft. 45°F UH-60 10 to 16 Ft. -
Page 17: Gas Supply Installation Instructions
Series 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. - Page 18 Installation Series • Gas Supply Installation Instructions Refer to Chart 3.2 for natural gas and Chart 3.3 for propane to determine the cubic feet per hour (CFH) required for the type of gas and size of unit to be installed. To determine the proper pipe diameter, use the CFH value and the length of pipe necessary from Chart 3.4.
- Page 19 Series Installation • Gas Supply Installation Instructions Chart 3.4 • Maximum capacity for Schedule 40 Metallic pipe, in CFH Pipe 1/2” 3/4” 1” 1-1/4” 1-1/2” 2” Length L.P. L.P. L.P. L.P. L.P. L.P. (feet) 10’ 1050 1600 1046 3050 1993 20’...
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Page 20: Leak Testing
Installation Series • Gas Supply Installation Instructions • Leak Testing Figure 3.4 • Recommended Hardware – Manual Shut Off and Sediment Trap Flow of Shut Off To Unit Ground Joint Union Gas Supply Line 1/8-in. NPT Test Connection (Plugged) 3-in. Minimum Sediment Trap... -
Page 21: Electrical Requirements And Wiring Diagrams
Series Installation • Electrical Requirements and Wiring Diagrams • Internal Wiring Diagrams Electrical Requirements and Wiring Diagrams WARNING Shock hazard. Disconnect power supply before making wiring connections to prevent electrical shock and equipment damage. Any original factory wiring that requires replacement must be replaced with wiring material having a temperature rating of at least 105°C. -
Page 22: Field Wiring Supply Voltage
Installation Series • Field Wiring Supply Voltage Field Wiring Supply Voltage Before proceeding with electrical connections, ensure that the supply voltage, frequency, phase and current capacity meet the requirements specified on the rating plate. A dedicated line voltage supply with properly sized wire should run directly from the main electrical panel to the heater. The power to the unit must be protected with a circuit breaker appropriate for the load. - Page 23 Series Installation • Field Wiring Figure 3.6 • Field Wiring Flexible Conduit BX or Romex Connector Junction Box L2 (Neutral) Ground Green White to L2 (Ground) (Neutral) Black to L1 (Hot) Connect wires together with UL approved wire connectors. Green to Ground Black to L1 White to L2 Note: A UL Listed switch may be installed in the 2x4 junction box for use as a service disconnect.
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Page 24: Thermostat Connection
Installation Series • Thermostat Connection Thermostat Connection NOTE: Different thermostats operate according to their particular features. Refer to the thermostat’s specifications for details. Each UH Series heater requires a single stage thermostat rated for 24VAC to operate. The heater comes standard with a terminal strip for making the thermostatic connections, located on the back panel. -
Page 25: Thermostat Location
Series Installation • Thermostat Location Thermostat Location The location of the thermostat should be determined by the desired heating requirements and be mounted on an inside wall five (5) feet above the finished floor. Locate the thermostat in a conspicuous location, away from where it could be influenced by heat from the unit or other sources, as this may cause the unit to short cycle. -
Page 26: Venting
Installation Series • Venting • Replacing Existing Equipment Venting The UH Series unit heater must be vented as described here to properly direct the flue gases from the unit to the outside atmosphere. The venting can terminate vertically through the roof (up) or horizontally through a sidewall (sideways). -
Page 27: General Venting Requirements
Series Installation • General Venting Requirements General Venting Requirements The venting system for the UH Series heaters may terminate horizontally through a sidewall or vertically through the roof, and may be individually or commonly vented. Configuration of the vent termination determines the category type. - Page 28 Installation Series • General Venting Requirements General Vent Requirements Figure 3.8 • Vent Cap 24 in. Min.* Roof* Storm Collar Adjustable Roof Flashing 1 in. Minimum Clearance Double-Wall B Vent 1 in. Minimum Clearance Fire Stop Spacer Heater B to C Adapter Clean Out Tee Fitting Clean Out Cap #8 Sheet Metal Screws (field supplied)
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Page 29: Vertical Venting (Category I)
Series Installation • Vertical Venting (Category I) • Vent Locations and Clearances Vertical Venting (Category I) An appliance that operates with a non-positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent is said to be ‘Category I’. The UH Series heater is considered a Category I appliance if the venting system meets all of the following criteria: •... -
Page 30: Horizontal Venting (Category Iii)
Installation Series • Rooftop Venting • Horizontal Venting (Category III) Rooftop Venting - Side View Figure 3.9 • Vent Cap 24 in. Min.* Roof Double-Wall B-Vent Pipe B to C Adapter Firestop Spacer Heater Clean Out Tee Fitting Clean Out Cap *Consult the NFPA ANSI Z223.1 Gas Vent Termination criteria if roof pitch exceeds 9:12. - Page 31 Series Installation • Vent Locations and Clearances • Sidewall Venting Requirements Vent Locations and Clearances: • Category III venting systems may NOT be common vented, and no other gas units are allowed to be vented into it. • Vent must terminate a minimum of 4 feet below, 4 feet horizontally from, or 1 foot above any window or door that may be opened or gravity air inlet into the building.
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Page 32: Common Venting (Category I)
Installation Series • Common Venting (Category I) • Common Rooftop Venting Common Venting (Category I) The common vent system and all attached appliances must be Category I. The vent connector should be routed in the most direct route from the units to the common vent. Where two or more vent connectors enter a common gas vent or chimney flue, the smaller connector shall enter at the highest level consistent with the available head room or clearance to combustible material. -
Page 33: Concentric Venting
Series Installation • Concentric Venting • Combustion Air Requirements Concentric Venting Contact the factory for concentric venting requirements. Combustion Air Requirements Combustion air may be supplied to the heater by indoor or outdoor means. Follow these guidelines and all applicable codes for all models prior to installing the combustion air duct work. Local codes may vary. -
Page 34: Separated Combustion Systems
Installation Series • Separated Combustion Systems Separated Combustion Systems All UH Series heaters come with a factory-installed combustion air adapter for attaching air intake ducts to the heater. Attach the air intake duct material to the adapter with three (3) non-corrosive sheet metal screws. - Page 35 Series Installation • Separated Combustion Systems Combustion Air Sidewall Intake - Side View Figure 3.12 • Outside Exhaust Terminal Cap Listed Wall Thimble (P/N: DB-208 or SWD-4) 6 in. 12 in. Clean-out Min. Min. 1/4 in. pitch per foot Combustion Air (upward or downward) Intake Cap Heater...
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Page 36: Room Air Combustion Systems
Installation Series • Room Air Combustion Systems Room Air Combustion Systems When operating this unit as a room air combustion appliance, the factory installed air intake collar may be removed and the required air for combustion can be taken into the appliance from the space, so long as it is not a confined space. -
Page 37: Unit Start-Up (Commissioning)
Series Installation • Unit Start-Up (Commissioning) • Pre-Start Up Checks Unit Start-up (Commissioning) WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, serious injury, or death. This heater must be installed and serviced by a trained gas installation and service personnel only. CAUTION Shock Hazard. -
Page 38: Verify Proper Inlet Pressure
Installation Series • Verify Proper Inlet Pressure Verify Proper Inlet Pressure Before starting up the unit, smell all around the unit heater for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. When turning the gas shut off valve, only use your hand. -
Page 39: Verify Manifold Pressure
Series Installation • Verifying Manifold Pressure Remove the pressure gauge tube and the 1/8 inch NPT hose connector. Replace the inlet pressure tap plug on the gas control valve. Leak check the re-installed pressure tap plug using a soap solution or equivalent method as described in ANSI Z223.1 (NFPA 54). -
Page 40: Prior To Leaving The Job Site
Installation Series • Prior to Leaving the Job Site While waiting for the unit to stabilize, observe the characteristics of the flame. The flame should be stable and should not lift from any burner. The burner color should be light blue, and not create excessive noise. -
Page 41: High Altitude Operation
High Altitude Conversion Kits for Elevations of 2,000 to 4,500 Feet Kit Number Orifice Size Number of Model Orifices Natural Gas Propane Natural Gas Propane UH-30 HKN-50_2 HKP-59_2 50 DMS 59 DMS UH-45 HKN-50_3 HKP-59_3 50 DMS 59 DMS UH-60... - Page 42 High Altitude Conversion Kits for Elevations of 4,501 to 7,000 Feet Kit Number Orifice Size Number of Model Orifices Natural Gas Propane Natural Gas Propane UH-30 HKN-51_2 HKP-60_2 51 DMS 60 DMS UH-45 HKN-51_3 HKP-60_3 51 DMS 60 DMS UH-60...
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Page 43: Operation
Series Operation • Sequence of Operation Operation WARNING This appliance does not have a pilot ignition. It is equipped with an ignition device which automatically lights the burner. Do not attempt to light the system by hand. Sequence of Operation Standby: The ignition control continually checks for internal faults, circuit integrity and relay contact positioning. -
Page 44: Shutdown Procedures
Operation Series • Shutdown Procedures Shutdown Procedures: Set the thermostat to the lowest setting. Turn OFF all electrical power to the appliance if service is to be performed. Turn manual shut off knob clockwise to OFF. Do not force. If the heater’s internal diagnostic LED displays any of the signals listed in Charts 4.1-4.2, address the indicated problem as outlined. - Page 45 Series This page intentionally left blank.
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Page 46: Troubleshooting Guide
Series Troubleshooting Guide Troubleshooting Guide Limit switch is open or pressure Turn on control Find source of switch is stuck closed. Find device for heat. electrical problem. faulty switch and repair. Does the draft Does the heater have 120 VAC Does the air circulating inducer motor at the main power connection? - Page 47 Series Troubleshooting Guide Bypassing any switch is intended for testing purposes only. Do not leave switch bypassed NOTICE during normal operation or the heater’s built-in safety mechanisms will be compromised. Corrective Process Start Remove Action Question Question obstruction. Check fuse on circuit board and Is there 24 VAC internal controls transformer.
- Page 48 Series Troubleshooting Guide Continued from page 46. Is the gas supply Check inlet pressure to the heater. Is it within Do the burners ignite? valve to the heater in the minimum and maximum allowable range the “on” position? as per the rating plate? Turn on gas supply Adjust inlet pressure.
- Page 49 Series Troubleshooting Guide Does the heater’s gas Check manifold pressure. Are Were the gas lines type match the gas you reading within the specified purged of all air? supplied? pressures per the rating plate? Contact local Adjust pressure or Purge gas lines. representative or factory.
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Page 50: Maintenance
Maintenance Series Maintenance To check gas tightness of the safety shut off valves, turn off the manual valve upstream of the appliance combination control. Remove the hex head plug on the inlet side of the combination control and connect a manometer to that tapping. Turn the manual valve on to apply pressure to the combination control. -
Page 51: Limited Warranty Terms And Conditions
Prompt Disposition. Detroit Radiant Products Company will make a good faith effort for prompt correction or other adjustment with respect to any product which proves to be defective within limited warranty. For any product believed to be defective within limited warranty, first write or call dealer from whom the product was purchased. -
Page 52: Heater Assembly Components And Parts List
Maintenance • Series Heater Components and Parts List UH Series Cabinet 1 (UH-30 & UH-45) Parts Listing Figure 5.1 • Heater Assembly Components... - Page 53 Series Maintenance • Heater Components and Parts List • Chart 5.1 UH Series Cabinet 1 (UH-30 & UH-45) Parts List Part No. Description Part No. Description CKP_54_2 Propane Conversion Kit (UH-30) UF-441 Gas Orifice (Indicate Size) CKP_54_3 Propane Conversion Kit (UH-45)
- Page 54 Maintenance • Series Heater Components and Parts List UH Series Cabinet 2 (UH-60, UH-75) Parts Listing Figure 5.2 • Heater Assembly Components...
- Page 55 Series Maintenance • Heater Components and Parts List • Chart 5.2 UH Series Cabinet 2 (UH-60, UH-75) Parts List Part No. Description Part No. Description CKP_54_4 Propane Conversion Kit (UH-60) UF-441 Gas Orifice (Indicate Size) CKP_54_5 Propane Conversion Kit (UH-75) UF-450 Burner Chamber Support Bracket UF-114...
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Page 56: Kit Contents
LIOUH-Rev. 02813 Model#: ___________________ Serial #: _________________________ Print: 1M-01/13 (DRP) (located on rating label) UF-616 LLUH008 3” to 4” Vent/Intake Adapter Room Air Clearance Label (for UH-30 and UH-45 only) Part No. Description UH-30 UH-45 UH-60 UH-75 LIOUH UH Series Installation Manual...
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