4-WAYMULTIPOISE GAS FURNACE
Installation, Start-up,Operating and
Service and Maintenance Instructions Series 140/E
312AAV/JAV 2-STAGEDELUXE, INDUCED COMBUSTION
312AAV
Fig. 1 - Dimensional Drawing
Table 1 - Dimensions - In. mm
CUT HAZARD
SAFETY CONSIDERATIONS
INTRODUCTION
FURNACE RELIABILITY HAZARD
312AAV
Fig. 2 - Clearances to Combustibles
Step 6 - Gas Piping and Gas Pipe Pressure Testing
ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDURE
Step 1 - Safety
Step 2 - General Installation
CARBON MONOXIDE POISONING AND UNIT DAMAGE HAZARD
LOCATION
Fig. 4 - Multipoise Orientations
GENERAL
FIRE, INJURY OR DEATH HAZARD
Fig. 5 - Installation in a Garage
Fig. 6 - Prohibit Installation on Back
AIR FOR COMBUSTION AND VENTILATION
312AAV
FURNACE CORROSION HAZARD
CARBON MONOXIDE POISONING HAZARD
Outdoor Combustion Air Method
CARBON MONOXIDE POISONING HAZARD
Outdoors
Indoors
INSTALLATION
Leveling Legs If Desired
DOWNFLOW INSTALLATION
HORIZONTAL INSTALLATION
Fig. 9 - Removing Bottom Closure Panel
Roll-OutProtection
Fig. 11 - Floor and Plenum Opening Dimensions
Installed on a Combustible Floor
Platform Furnace Support
312AAV
Table 4 - Opening dimensions - In. mm
Fig. 14 - Duct Flanges
UPFLOWDOWNFLOW HORIZONTAL
1/4 6mm THREADED ROD 4 REQ
Fig. 15 - Horizontal Unit Suspension
Fig. 16 - Horizontal Suspension with Straps
312AAV
Ductwork Acoustical Treatment
Fig. 17 - Typical Attic Installation
FILTER ARRANGEMENT
AIR DUCTS General Requirements
312AAV
Table 5 - Air Delivery - CFM With Filter
GAS PIPING
Table 5 - Air Delivery - CFM With Filter* Cont
Downflow Furnaces
Return Air Connections
A02162
312AAV
A02075
A02163
Fig. 22 - Typical Gas Pipe Arrangement
Table 6 - Maximum Capacity of Pipe
FURNACE DAMAGE HAZARD
Fig. 21 - Burner and Manifold
ELECTRICAL CONNECTIONS
Fig. 23 - Field Wiring Diagram
115-VWIRING
ELECTRICAL SHOCK AND FIRE HAZARD
ELECTRICAL CONNECTION TO J-BOX
Table 7 - Electrical Data
J-BOXRELOCATION
Fig. 24 - Relocating J-Box
312AAV
POWER CORD INSTALLATION IN FURNACE J-BOX
BX. CABLE INSTALLATION IN FURNACE J-BOX
24-VWIRING
and Single-SpeedHeat Pump
Fig. 26 - Two-StageFurnace with Two-SpeedAir
Conditioner
Dual Fuel
312AAV
FOR FIGURES
and Two-SpeedHeat Pump
and Two-SpeedAir Conditioner
312AAV
ACCESSORIES
VENTING
Fig. 33 - Furnace Control-PSCBlower Motor
CARBON MONOXIDE POISONING HAZARD
GENERAL VENTING REQUIREMENTS
MASONRY CHIMNEY REQUIREMENTS
312AAV
A10133
Fig. 34 - Chimney Inspection Chart
312AAV
Thousands of BTUH per Hour
Installations with Type-B Double-WallVent
Connectors ENFPA & AGA
Exterior Masonry Chimney FAN + NAT
312AAV
Fig. 35 - Upflow Application-VentElbow Up
ADDITIONAL VENTING REQUIREMENTS
Fig. 36 - Upflow Application-VentElbow Right
312AAV
Fig. 38 - Downflow Application-VentElbow Up
then Up
then Up
312AAV
312AAV
VENTING NOTES FOR FIG
312AAV
START-UP,ADJUSTMENT, AND SAFETY CHECK
Step 1 - General
BURN HAZARD
UNIT DAMAGE HAZARD
Step 2 - Start-UpProcedures
Step 3 - Adjustments
FIRE AND EXPLOSION HAZARD
312AAV
Table 11 - Altitude Derate Multiplier for U.S.A
Fig. 48 - Redundant Automatic Gas Control Valve
ELECTRICAL SHOCK HAZARD
Fig. 49 - Orifice Hole
312AAV
312AAV
Table 12 - Gas Rate cu ft. /hr
FURNACE OVERHEATING HAZARD
FIRE HAZARD
Table 13 - Speed Selection
312AAV
ELECTRICAL SHOCK HAZARD
312AAV
Step 4 - Check Safety Controls
Step 5 - Checklist
Fig. 50 - Amp. Draw Check with Ammeter
A10184
312AAV
A10184A
312AAV
A10185
312AAV
A10185A
312AAV
FIRE, PERSONAL INJURY AND UNIT DAMAGE HAZARD
SERVICE AND MAINTENANCE PROCEDURES
ELECTRICAL CONTROLS AND WIRING
Step 1 - Introduction
SERVICE
Step 2 - Care and Maintenance
Fig. 51 - Service Label
CARBON MONOXIDE POISONING AND FIRE HAZARD
A07125
Fig. 52 - Wiring Diagram
312AAV
312AAV
CLEANING AND/OR REPLACING AIR FILTER
Table 17 - Filter Size Information In. / Mm
BLOWER MOTOR AND WHEEL
UNIT DAMAGE HAZARD
CLEANING HEAT EXCHANGER
Fig. 53 - Igniter Position-SideView
312AAV
312AAV
Fig. 55 - Cleaning Heat Exchanger Cell
Step 3 - Sequence of Operation
Fig. 54 - Igniter Position-TopView
See Fig. 23 or 32 for thermostat connections
312AAV
312AAV
a.Single-SpeedCooling
4.Thermidistat Mode
312AAV
Step 4 - Wiring Diagrams
Step 5 - Troubleshooting
5.Continuous Blower Mode
312AAV
Fig. 56 - Troubleshooting Guide - 2-Speed
A05001
KitAdapter Chimneyin usedswitch shutoffvent
312AAV
Blocked
PART NUMBER
Table 18 - Accessory List
312AAV
DESCRIPTION
ELECTRICAL GROUP
PARTS REPLACEMENT INFORMATION GUIDE
CASING GROUP
GAS CONTROL GROUP