80+SingleStage
Address
Limit Opens
Drip-Leg Upstream of Gas Valve? Yesi NOI
Dealer Name
Safe Installation Requirements
FIRE, EXPLOSION, and Asphixiation Hazard
Installation Requirements
Frozen Water Pipe Hazard
Location and Clearances
Carbon Monoxide Poisoning Hazard
Dimensions and Clearances N8MPN/L
Dimensional Information
Furnace
ReturnAir
Installation Positions
Furnace Installation
Dimensions and Clearances *8MPN/L Models
41I
Typical Horizontal Installation
Horizontal
Downflow
Fire Hazard
Pressure Switch Relocation
Rotating the Venter Assembly
Side Venting
Burn Hazard
Air Openings and Connecting Ducts
Combustion & Ventilation Air
Outdoor Combustion Air Method
Requirements
ThisinstallationNOTapprovedin Canada
SoffitVen
Indoor Combustion Air
FreeArea
MINIMUMSPACEVOLUMEFOR100%COMBUSTION
Ventilation Air
Category I Safe Venting Requirements
Andventilationair Fromindoors ft
Venting and Combustion Air Check
Venting to Existing Masonry Chimney
Vent Check
Lowing Check
Category I Furnaces With External Power Venters
Horizontal Venting
Vent Termination
Combined Venting into a Masonry Chimney
Iviventterminal
Masonry Chimney Venting
Chimney Inspection
Failure to properly vent this furnace could result
Authority having jurisdiction approves
Chimney Inspection Chart
Sll
FAN+NAT Installations with
Type-B Double-Wall Vent Connectors
Exterior Masonry Chimney
Nfpa & AGA
Gas Supply and Piping
Ventdampersonanyapplianceconnectedto the common vent
Gas Pressures
Typical Gas Piping N8MP
Left Side Gas Supply Piping N8MP
Piping with Close Nipples and Standard Elbows
Piping with Street Elbows
Final Check
Typical Gas Piping aMP
Piping with Street Elbows
Fire or Explosion Hazard
Electrical Wiring
Power Supply Wiring
Box Relocation
Thermostat
Ductwork and Filter Upflow/Horizontal
Furnace Control
Furnace Control Fuse
Duct Design
Duct Installation Requirements
Filters
High-Velocity Air Filter Sizes max600FPM
Risk of Reduced Furnace Life
Optional Filter Rack Installation Side Return
Internal Filter in Bottom- Return Installation
Addition Of Air Conditioning
20 x 25 Optional Filter Rack
Sub-bases For Combustible Floors Dimensions
Ductwork and Filter Downflow
Outlet Duct Flange
Sub-Bases for Combustible Floors Furnace Only
Exploded View of Sub-Base for Furnace only
Sub-base for Combustible Floors Downflow Coil
Adapter Box
Non-Combustible Floor
Checks and Adjustments
Manifold Gas Pressure Adjustment
Startup
Orifice Sizing
Wiseto decreasemanifoldpressureand clockwiseto
Natural Gas Input Rating Check
Operation Above 2000 Altitude
High Altitude Air Pressure Switch
I! i! i I! i! i! i! i
Changing Orifices
Natural GAS Manifold Pressure w.c
LP Conversion
Main Burner Flame Check
FIRE, EXPLOSION, Unit Damage Hazard
Removing NOx inserts
Hard Wired Continuous-Fan Operation
Changing Blower Speed
Ignitor Location
Reduced Furnace Life Hazard
Ous-fanoptionThisconnectionisintendedfor.thelow speed mo
Separate speed selections for Heat, Cool,
FIRE, EXPLOSION, or Carbon Monoxide Poisoning Hazards
Electrical SHOCK, Fire or Explosion Hazard
Sequence of Operation & Diagnostics
Continuous Circulating Fan Hard-Wired Cont Request
Continuous Circulating Fan G Request
Heating W Request
Control Board Diagnostic Codes See Figure
Heating Request with Gas Shut Off
Control Board
OFF
N8MPN050B12B1 N8MPL050B12B1
N8MPN075F16B1 N8MPL075F16B1
Denotes Brand
This Data is Subject to Change Without Notice
44101261302
General InputBtuh
441ol
Limits& Controls
PSC/II2 PSC/I/2
Natto LP NAHA001LP1172958
NatlLP NatlLP NatlLP NatlLP NatlLP NatlLP NatlLP NatlLP
8MPN
PSC/I/2 PSCII/2 PSCI3/4
441Ol261302
N8MPN/L050B12& *8MPN/L050B121 DenotesBrand
N8MPN/L075B12& *8MPN/L075B121 * Denotes Brand
N8MPN/L075F16& *8MPN/L075F1613* DenotesBrand
N8MPN100F14& *8MPN100F141 Denotes Brand
N8MPN/L125J2226
ISMPN150J2027* DenotesBrand
44101261302
Eutrali Switch
II,DUER%I .ICAPACITOR a
Ndif
Junction Relay Heatimhio
16 \
\ u
Replacement Parts N8MPN NaturalGas
Nsmpn
Replacement Parts N8MPN NaturalGas
Ioof
Key Description Part 12B1
14B1 20B1
20A1 22A1
Parts Not Illustrated
Replacement Parts N8MPL NaturalGas
N8MPL
Key Description Part 050B 075F
NSMPLO75B12B1
NSMPLIOOF2OB1 N8MPLIOOJ2OB1
NSMPL125J22B1
Nsmpl
Parts for *8MPN/L
IReplacement Parts *8MPN NaturalGas
Panel Top
Partnot Illustrated
Parts *8MPL NaturalGas
Key Description
075B
Replacement Parts 8MPL NaturalGas