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®
Combat
UHD-Series
Tubular Duct Furnace
(Standard Range)
Installation, Operation
& Service Manual
Models UHD[X][S][R]
150, 175, 200, 225
250, 300, 350, 400
Installer
!
!
Please take the time to read and understand
"
#
these instructions prior to any installation.
$
Installer must give a c
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TABLE OF CONTENTS SECTION 1: Heater Safety......................................................1 SECTION 10: Operation and Maintenance ..........................21 1.1 Manpower Requirements .............................................1 10.1 Pre-Start-Up Checks ................................................21 SECTION 2: Installer Responsibility .....................................2 10.2 Begin Start-Up .........................................................21 2.1 Wall Tag ..................
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TABLE OF FIGURES Figure 1: Clearances to Combustibles ......................................3 Figure 2: Air Flow Direction.......................................................7 Figure 3: Suspension Methods .................................................8 Figure 4: Vent and Roof Detail ................................................ 11 Figure 5: Standard Vented Heater - Vertical and Horizontal Vent Termination...................................................... 12 Figure 6: Standard Vente
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SECTION 1: HEATER SAFETY SECTION 1: HEATER SAFETY Your Safety is Important to Us! This symbol is used throughout the manual to notify you of possible fire, electrical or burn hazards. Please pay special attention when reading and following the warnings in these sections. Installation, service and quarterly inspection of heater must be done by a contractor qualified in the installation and service of gas-fired heating equipment. Read this manual carefully before installation, operation
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UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL SECTION 2: INSTALLER RESPONSIBILITY The installer is responsible for the following: 2.2 Corrosive Chemicals • To install the heater, as well as the gas and Caution: Do not use heater in an area containing corrosive chemicals. Avoid the use of corrosive electrical supplies, in accordance with applicable chemicals to ensure a longer life of the burner, heat specifications and codes. Roberts-Gordon exchanger and other parts. r
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SECTION 3: CRITICAL CONSIDERATIONS SECTION 3: CRITICAL CONSIDERATIONS 3.1 Basic Information 3.5 Clearances to Combustibles UHD[X][S][R] heaters have automatic ignition WARNING burners for ON/OFF operation only. 3.2 Manufactured Units Gas-fired, power-vented duct furnace with tubular heat exchanger. Units shall have a minimum of 82% thermal efficiency. The standard unit shall consist of a non-separated combustion design with an Fire Hazard aluminized heat exchanger. Design and heat exchange
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UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 3.6 Ventilation 3.8 Electrical Supply WARNING WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented. Vented heaters must be vented outdoors. Electrical Shock Hazard Unvented heaters must be Disconnect electrical and gas supply before installed in buildings with servicing. ventilation rates as per section 6.4. This appliance must be connected to a properly grounded electrical source. Failure to follow
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SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES 4.1 Gas Codes 4.3 Parking Structures and Repair Garages The type of gas appearing on the name plate Installation in garages must be in accordance must be the type of gas used. Installation must with the following codes: comply with national and local codes and United States: Standard for Parking Structures requirements of the local gas company. NFPA 88A - latest revision or the Code for Unit
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UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 4.6 High Altitude These heaters are CSA-approved (without modifications) for installations up to 2000' (610 m) in US and Canada. CSA approved heaters installed above 2000' (610 m) must be de-rated. For installations above 2000' (610 m) in US, consult factory for information on burner de- rating. For installations from 2000' (610 m) to 4500' (1370m) in Canada, high altitude conversion kits are available. Heaters installed
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SECTION 5: DUCT HEATER INSTALLATION SECTION 5: DUCT HEATER INSTALLATION range shown on Page 7 , Section 5.1.2. The minimum inlet duct lengths shown on Page 7, Section 5.1.1 5.1 General must be observed. Pressure drop through the heat To connect the inlet and outlet ducts to the heater, exchanger at various air flows is shown on Page 7, Duct-Mate or similar flanges may be slid over the Section 5.1.2. duct connector flanges supplied on the unit and Figure 2: Air Flow Direction secured with
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UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 5.1.3 Air Flow And Temperature Rise Ranges Model Rate Air Flow Temperature Rise (Btu/h) Minimum (CFM) Maximum (CFM) Minimum (°F) Maximum (°F) UHD[X][S][R] 150 150,000 1,360 5,800 20 83 UHD[X][S][R] 175 175,000 1,400 6,850 20 95 UHD[X][S][R] 200 200,000 2,050 7,750 20 73 UHD[X][S][R] 225 225,000 2,100 8,300 20 80 UHD[X][S][R] 250 250,000 2,350 8,850 22 80 UHD[X][S][R] 300 300,000 2,700 10,200 23 86 UHD[X][S][R] 350 350,000 3,120
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SECTION 6: VENTING SECTION 6: VENTING tape or silicone sealant must be used to seal all joints. WARNING Aluminum tape shall have a minimum temperature Carbon Monoxide Hazard rating of 400° F (204° C) and meet SMACNA AFTS- 100-73 standards. High temperature silicone sealant Heaters may be installed must have a minimum temperature rating of 480° F vented or unvented. (250° C). Vented heaters must be vented outdoors. 6.2.1 United States Requirements Unvented heaters must be Vent must termina
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UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Vents and air intakes must be adequately States); 3 cfm per 1000 Btu/h firing rate (Canada). supported so that the heater does not bear the weight of the pipes. WARNING: Combustion by-products contain a For vent termination See Page 11, Figure 4 through chemical known to the State of California to cause Page 14, Figure 9. cancer and birth defects or other reproductive harm. 6.3.1 Standard Vented Heaters 6.5 Horizontal Ventin
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SECTION 6: VENTING The entire vent should be insulated with foil faced 4. Follow the lighting instructions. Place the fiberglass insulation (1/2" thick, 1-1/2# density appliance being inspected in operation. minimum). Adjust thermostat so that the appliance will operate continuously. 6.7.1 Maximum Vent Lengths 5. For any appliance having a draft hood, test for draft hood appliance spillage at the draft hood Model UHD[X][S][R] 150 - 400 Number of Elbows 40 ft (12.2 m) 1 relief opening after
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UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Figure 5: Standard Vented Heater - Vertical and Horizontal Vent Termination Model Vent Diameter Part Number UHD[X][R] 150 - 400 4" (10 cm) 90502102 Figure 6: Standard Vented Heater - Common Vertical Vent Termination 12
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SECTION 6: VENTING Figure 7: Separated Combustion Heater - Vertical and Horizontal Vent Termination 12" (31 cm) Minimum from air inlet to vent termination (may be horizontal NOTE: Vent supports not or vertical clearance). shown. Duct supports not shown. Duct and 12" (31 cm) vent supports not Minimum from provided by the wall to vent manufacturer. termination. Vent 12" (31 cm) Air Intake* Minimum from air inlet to vent Vertical termination (may be Option Horizontal horizontal or
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UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Figure 9: Concentric Vertical and Horizontal Vent Termination - Separated Combustion Heater Description Part Number Qty. Model Vent Diameter Concentric Vent Kit (150 - 250) UHVK1 UHD[X]S[R] 150 - 400 4" (10 cm) Concentric Vent Box Top & Side Assembly 90504113 1 Model *Air Intake Diameter Concentric Vent Box Bottom Assembly 90504112 1 UHD[X]S[R] 150 - 250 4" (10 cm) Screw #6 x 3/8 Self Drilling 91119100 14 UHD[X]S[R] 300 - 400 5
