Manuals / Allied Air Enterprises / Household Appliance / Furnace

Allied Air Enterprises Upflow Confined Space / Outdoor Air, From Attic & Crawl Space

Models: Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace Upflow

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FROM ATTIC

Figure 4	When horizontal ducts are used to supply air from the
CONFINED SPACE / OUTDOOR AIR	outdoors, they must be of the same cross sectional area
	as the free area of the openings to which they connect.
FROM ATTIC	The minimum dimension of rectangular air ducts must not
	be less than 3 inches. Each opening must have a free
	area of not less than one square inch per 2,000 Btu per
	hour of total input of all appliances within the "Confined
	Space". These openings must be located 12 in. from the
	top and bottom of the furnace area. Neither opening can
	be blocked at any time (See Figure 6).
	Figure 6
	CONFINED SPACE / OUTDOOR
	AIR THROUGH HORIZONTAL DUCTS

Figure 5

CONFINED SPACE / OUTDOOR AIR

FROM ATTIC & CRAWL SPACE

For an attic installation it is important to keep insulation 12" or more away from any furnace openings. Some types of insulating materials may be combustible.

Furnaces installed with combustion air drawn from a heated space which includes exhaust fans, fireplaces, or other devices that may produce a negative pressure should be considered confined space installations.

20571201

Issue 0527

Page 10 of 28

Image 10

Allied Air Enterprises Upflow specifications Confined Space / Outdoor Air, From Attic, Air Through Horizontal Ducts

Contents

TABLE OF CONTENTS WHAT TO DO IF YOU SMELL GASIssue SAFETYPage 2 of Issue FURNACE SPECIFICATIONSPage 3 of Adjusting Airflow Issue FURNACE WIRING SPECIFICATIONSPage 5 of INTRODUCTION IssuePage 6 of This furnace may be installed on non-combustible LOCATION / PLACEMENTINSTALLATION POSITIONS Figure HORIZONTAL LINE CONTACTContaminated Combustion Air AIR FOR COMBUSTION AND VENTILATIONAdequate Ventilation and Combustion Air CONFINED SPACE / INDOOR AIR CONFINED SPACE / OUTDOOR AIRCONFINED SPACE / OUTDOOR CONFINED SPACE / OUTDOOR AIRFROM ATTIC AIR THROUGH HORIZONTAL DUCTSDuctwork Recommendation Table SPECIAL BASE INSTALLATIONDUCTING Figure BOTTOM PANEL REMOVALFilters Pre-InstallationVent System InspectionVENTING EXTERNAL FILTER RACK SIZEHorizontal Venting Masonry ChimneyType B Vent Table 4 AUXILIARY DRAFT INDUCERSFigure VENT PIPE GUARD KIT Figure VENT EXIT OPTIONSTo Convert toSide Flue Exit For Horizontal PositionsThermostat ELECTRICAL CONNECTIONSCARBON MONOXIDE POISONING HAZARD Single Stage Thermostat OperationFigure AUTOMATIC HEAT STAGING JUMPER TYPICAL GAS SERVICE CONNECTIONGAS CONNECTIONS FIRE OR EXPLOSION HAZARDVariable Speed Features CONTROL BOARD & VARIABLE SPEED MOTOR FEATURESElectronicAir Cleaner Connections Circulating Airflow AdjustmentsHeresHow Your Heating System Works UNIT SEQUENCE OF OPERATIONCooling Mode Standby ModeSTARTUP AND OPERATIONAL CHECKOUT Figure GAS CONTROL DIAGRAMManifold Pressure Adjustment Figure TYPICAL FLAME APPEARANCE Main BurnersDetermining Furnace Input - Natural Gas Only TABLE Gas Rate Cubic Feet per HourTABLE Burner Orifice Selection Blower Adjustment CheckoutBurner Orifice Sizing NaturalPressure Switch Check Flame Rollout SwitchFigure FLAME ROLLOUT SWITCH IssueSEQUENCE OF OPERATION DIRECT IGNITION SYSTEM CONTROLELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD Manifold or Burner/Manifold Removal/ReplacementSERVICING THE FURNACE Combustion Component CheckFigure BLOWER REMOVAL AND REPLACEMENT Blower Removal/ReplacementLubricating Motors High Heat State LED TroubleshootingFault Code History Button CFM LEDIssue WIRING DIAGRAMPage 27 of Issue Page 28 of