Sterling RF-30, RF-60, RF-90, RF-75, RF-45 specifications Category I Horizontal Venting Requirements

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Table 4 - Category I Horizontal Venting Requirements

	Vent	Maximum Number	Maximum Horizontal	Minimum	Extension
Unit	Diameter	Elbows	Vent Length	Vertical Rise	Distance
Size	(in)	*	(Ft.)	(In.)	from Wall

30	4	1	4	12	36
	4	1	8	18	36
	4	2	4	12	36
	4	2	8	18	36

45	4	1	10	18	36
	4	2	5	18	36
	5	2	10	12	36

60	5	2	10	12	36

75	5	2	10	24	36

90	5	1	10	24	24
	5	2	10	36	24

*One elbow is required to make the vertical extension, See Figure 13.

Figure 13 - Category I Horizontal Venting Requirements

D-06838A

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Image 14

Contents Tubular GAS Fired Direct Spark Propeller Unit Heaters Receiving InstructionsTable of Contents DescriptionGeneral Safety Information Dimensional Drawing Tubular 30 thru 90 Propeller Unit Heater Installation Installation Gas Pipe Size GAS PipingPipe Sizing Pipe Installation Gas Piping RequirementsThermostat Wiring and Location Electrical ConnectionsElectrical Connections Venting into an unlined masonry chimney is prohibited Additional Requirements for Canadian InstallationsVenting Not apply to equipment specified Vertically Vented Unit Heaters CategoryVenting Categories Within this manualVent Systems Termination Clearance Requirements Structure Category I Horizontal Venting Requirements Vent Maximum Number Maximum Horizontal Minimum ExtensionVent Support Horizontally Vented Unit Heaters Category Type B Draft Hood Connector Venting Venting Determine and Correct the Cause of the flame roll-out OperationExplanation of Controls See Figure Shut DownMain Burner Orifice Schedule Primary AIR Shutter AdjustmentGAS Input Rate Tubular Unit Heater High Altitude DerationPeriodic Service Never over oil the motor or premature failure may occurTubular Propeller Troubleshooting Guide Symptoms Possible Causes Corrective ActionRealign power ventor wheel Check for continuous 115v on terminal Troubleshooting with LED Indicator Assistance LED Status Indicates CHECK/REPAIRItemDescription Propeller Parts HOW to Order Replacement Parts PRE-INSPECTION Information With power and gas offWith power and gas on General