Roberts Gorden UHA[X][S] 30, UHA[X][S] 45 Concentric Vent Box, Vertical Option, Horizontal

Page 25

Vertical

SECTION 6: VENTING

Figure 12: Separated Combustion Heater - Vertical and Horizontal Vent Termination

12" (31 cm) Minimum from air inlet to vent termination (may be horizontal or vertical clearance).

NOTE: Vent supports not shown.

4" (10 cm) Diameter Air Intake

Vertical

Option

12" (31 cm)

Minimum from wall to vent termination.

4"

(10 cm) Diameter Vent

Listed Thimble

through

Combustible Wall

4" (10 cm)

Diameter Vent

4" (10 cm) Diameter

Air Intake

12" (31 cm)

Minimum from wall to vent termination.

Vent

Termination

Air Intake Termination

12" (31 cm)

Model	Air Intake & Vent Diameter	Part Number	Horizontal
UHA[X]S 30 - 125	4" (10 cm)	90502102	Horizontal
			Option
			Option

Minimum from air inlet to vent termination (may be horizontal or vertical clearance).

Figure 13: Concentric Vent Box

			of	4"	(10	cm)
	piece			4"	Model

One

		.Selkirk
	ent
	v

type

				(6	cm)	airspace
		1/4"			cm)	others)
						others)
				.(By
diameter, iv
	qu		alent
Vor	e
R

“B”

Seal joint between single wall

and Type B vent with silicone sealant.

Combustion Air
to Heater	Use 3 sheetmetal

Concentric

Vent Box

Toward

Outside

6" (15 cm) Single Wall Inlet Air Pipe (By Others)

Exhaust	screws equally
	spaced around joint.

from Heater

4" (10 cm) Single Wall Vent Pipe (By Others)

Use 3 sheetmetal screws equally spaced around collar.

19

Image 25

Contents Combat Installation, Operation & Service ManualUHA-Series Tubular Unit Heaters Low Profile Range Models UHAXS 30, 45, 60, 75, 100,Page 2008 Roberts-GordonLLC TABLE OF CONTENTSPrinted in U.S.A Page TABLE OF FIGURES Page 1.1 Manpower Requirements SECTION 1: HEATER SAFETY1.2 Safety Labels and Their Placement For separated combustion units only Figure 1: UHA 30 - 45 Label PlacementFor separated combustion units only Figure 2: UHA 60 - 75 Label PlacementFor separated combustion units only Figure 3: UHA 100 - 125 Label Placement2.1 Wall Tag SECTION 2: INSTALLER RESPONSIBILITY2.2 Corrosive Chemicals 2.3 National Standards and Applicable Codes3.2 Manufactured Units 3.4 Minimum Required Installation Clearances3.5 Clearances to Combustibles 3.6 Ventilation3.8 Electrical Supply 3.7 Gas Supply3.9 Vent 4.2 Aircraft Hangars 4.1 Gas Codes4.3 Parking Structures and Repair Garages 4.4 Electrical4.6 High Altitude 5.2 Shelf Mounting and Suspension SECTION 5: MAJOR COMPONENTS 5.1 General5.3 Wall Mounting Crush Hazard Use 3/8 threaded rod minimumFigure 6: Shelf-MountingMethods Figure 5: Suspension MethodsExisting cabinet screws must be re-used Part Number DescriptionWall Shelf Mounting Bracket Kit DescriptionPush in Figure 8: Vertical Louvers Optionallouver and compress spring to removeSECTION 6 VENTING 6.3 Vent Installation6.1 Changing Vent and Air Intake Orientation 6.2 Venting6.4 Unvented Operation 6.3.1Standard Vented Heaters Models UHAX 30 -6.5 Horizontal Venting 6.7 Length Requirements 6.6 Vertical Venting6.7.1 Maximum Vent Lengths 6.8 Vent MaterialVertical Figure 9: Vent and Roof DetailHorizontal OptionPage Vertical Option Figure 13: Concentric Vent BoxHorizontal OptionVent Terminal 7.2 Unvented Installation 7.1 Separated Combustion InstallationSECTION 7 AIR SUPPLY 7.3 Building Ventilation8.1 Connections SECTION 8: GAS PIPINGFigure 15: Gas Connection 9.1 Positioning Thermostats SECTION 9: WIRING9.1.1 Fan Control 9.2 Low Voltage Thermostat with One HeaterRelay Type ModelRelay Part Number UHAXS 30 -DPST UHAXS 60 -90436300 Max. Number of Heaters9.5 Internal Wiring Diagram 9.6 Ladder Wiring Diagram 9.7 Electrical Connection to the Heater 10.1 Pre-Start-UpChecks SECTION 10: OPERATION AND MAINTENANCE10.1.1 Louvers 10.1.2 Electrical ChecksFigure 17: Gas Valve for Models UHAXS 30 - Figure 16: Automatic Burner Control SequenceRequired Incoming Signals Signals Output By ControlFigure 18: Gas Valve for Models UHAXS 60 - 10.2.3 Pressure SwitchCheck Gas Rate 10.2.4 Turning Off the Heater10.3 Complete Start-Up 10.2.5 External Controls10.3.1 Instruction to the User Figure 19: Manual Reset Limit Switch Reset Limit Switch - See Page 33, SectionSECTION 11: USER INSTRUCTIONS 11.1 User Instructions11.5.1 Simple Troubleshooting Burner Faults 11.5 Simple TroubleshootingFigure 20: LED Diagnostic Codes 11.4.2 To Turn the Heater Off12.3 Fan/Motor Assembly Maintenance 12.2 Burner Maintenance12.4 Heat Exchanger Maintenance 12.5 Gas Valve Maintenance12.7 Venting and Air Intake Pipe 12.8 Maintenance ChecklistThe Vicinity of the Heater See Page 6, SectionCombustion Air Intake when installedPipe Heat ExchangerSTART SECTION 13: TROUBLESHOOTING 13.1 GeneralSECTION 13: TROUBLESHOOTING 13.3 Troubleshooting for Flame Supervision System 13.5Troubleshooting for Flue Blower 13.4Troubleshooting for Gas ValvesCorrect power STARTBurner Components SECTION 14 REPLACEMENT PARTS14.1 Gas Valve 14.2.1 Burner Injectors 14.2 Burner Compartment14.3 Ignition Electrode and Flame Probe 14.5 Louver and Louver Springs 14.4 Heat ExchangerInstall Vertical screws Horizontal14.6 Flue Blower Vertical Installation 14.9 Axial Fan/Guard/Motor Assembly 14.7 Pressure Switch14.8 Ignition Control 14.9.2 To Replace the Fan Assembly 14.9.1 Fan Removal and Replacement14.10 Limit Switches 14.10.1 Removal and ReplacementTOP VIEW SECTION 15: SPECIFICATIONS 15.1 Dimension DataSIDE VIEW REAR VIEW15.3 Technical Data Table All Models 15.2 General Technical Data Table All ModelsROBERTS GORDON WILL PAY FOR WARRANTY IS VOID IFROBERTS GORDON WILL NOT PAY FOR Roberts-GordonPage About the Installer OWNER WARRANTY REGISTRATION CARDPurchased From if different than installer Type of Installation check onePage Page Fire Hazard Installation Clearancesclose to heater injury or property damage