Main
80+SingleStage
CategoryIFurnace
PrintedinU.S.A. 11/10/2005 441 01 2613 (02)
N8MPN&N8MPL *8MPN&*8MPL
SAFETY REQUIREMENTS
YES_I NO_I YES_I NO_I
NO [_I
YEs_I NO[31
NO[_I
NOE_I
1. Safe Installation Requirements
Safety Rules
Frozen Water Pipe Hazard Ifyourfurnace remains off for an extended time, the pipes in your
2. Installation
Location and Clearances
Installation Requirements
Dimensions and Clearances (N8MPN/L)
DIMENSIONAL INFORMATION
11124,10 213,4
Dimensions and Clearances (*8MPN/L Models)
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DIMENSIONAL INFORMATION
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Installation Positions
Horizontal
Typical Horizontal Installation
Main Line Entry
Pressure Switch Relocation
3. Side Venting
Rotating the Venter Assembly
Typical Downflow Installation
Furnace with Screws
Venter Gasket
4. Combustion & Ventilation Air
Outdoor Combustion Air Method
Air Openings and Connecting Ducts
Requirements
Contaminated Combustion Air
I/ SoffitVen,
4. Combination of Indoor and Outdoor Air shall have:
FreeArea
Indoor Combustion Air
Standard and Known-Air-Infiltration Rate Methods
75 I
If: [ other=combined input of all other than fan-assisted appliances in Btu/hr
ACH =air changes per hour (ACH shall not exceed 0.60.)
Ventilation Air
5. Gas Vent Installation
/2N
Venting to Existing Masonry Chimney
NOTE: Two (2) 45 elbows are equivalent to one (1)90 elbow.
Combined Venting into a Masonry Chimney
6. Horizontal Venting
Category I Furnaces With External Power Venters
Vent Termination
Venting Through a Non-Combustible and Combustible Wall
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Other than Direct Vent Termination Clearance
IVIVENTTERMINAL AIRSUPPLVINLET
3'(01cm) 7'(2.13m)
7. Masonry Chimney Venting
Chimney Inspection
Connector Type
VentingRestrictions for Chimney Types
5. The authority having jurisdiction approves.
Oondonsoto ",,<u,ob,,y
sll ed,,stedfle,ib,o eta,
j Tu_ I NotSuitable andlinerorventmanufacturer's
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Exterior Masonry Chimney, FAN+NAT Installations with Type-B Double-Wall Vent Connectors
APPLIANCE APPLICATION REQUIREMENTS
Vent dampers onany appliance connected
8. Gas Supply and Piping
GasPiping Requirements
GasSupply Requirements
IGasPressures
RightSide Gas SupplyPiping (N8MP)
Left Side Gas Supply Piping (N8MP)
Piping with Street Elbows
Gas Valve with Elbows (N8MP)
Piping with Close Nipples and Standard Elbows
Final Check
9. Electrical Wiring
Power Supply Wiring
J- Box Relocation
N8MPN/LModels
*8MPN/L Models
.0M
10. Ductwork and Filter (Upflow/Horizontal)
Duct Connections
Cutting Side Return Air Opening
Duct Design
Duct Installation Requirements
InspectionPanel on some models
Filters
A filter MUST be used.
High-Velocity Air Filter Sizes (max.600FPM)
Addition Of Air Conditioning
11. Ductwork and Filter (Downflow)
Exploded View of Sub-Base for Furnace ONLY
i!i ii
Sub-base for Combustible Floors -Downflow Coil Adapter Box
Condensate Line Raised by Base
Non-Combustible Floor
Duct Connections
o
Startup
GasSupply Pressure
Manifold Gas Pressure Adjustment 2. Turn gas ON. Operate the furnace by using a jumper wire on
wiseto decrease manifold pressure and clockwise to
Natural Gas Input Rating Check
Example
Orifice Sizing
FIRE, EXPLOSION, CARBON MONOXIDE POISONING HAZARD.
MANIFOLDPRESSUREAND ORIFICE SIZE FORHIGH ALTITUDEAPPLICATIONS
NATURAL GAS MANIFOLD PRESSURE (" w.c.)
High Altitude Air Pressure Switch
Changing Orifices
Manifold
LP Conversion
Main Burner Flame Check
Ignitor Location
Air TemperatureRise Check
REDUCED FURNACE LIFE HAZARD
Changing Blower Speed
Continuous-Fan Operationusing "G"
Hard Wired Continuous-Fan Operation
13. Furnace Maintenance
14. Sequence of Operation & Diagnostics
Cooling () Request:
Continuous Circulating Fan (G) Request:
Continuous Circulating Fan Hard-Wired (Cont) Request:
Heating (W) Request:
Heating Request with Gas Shut Off:
Control Board Diagnostic Codes (See Figure 40)
* Proper flame sense microamps: 0.7 microamps D.C. minimum 2.0 - 4.0 microamps nominal
Control Board
II I I I
Models
ALL Models(N8MPN)
GasType NatI LP NatI LPNatI NatI NatI NatI NatI LP NatI
THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE 44101261302
ALL Models(N8MPL)
OasType .atI LP .atI LP .at .at .at .at .at I LP
441ol261302 THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE [_1
ALL Models(*8MPN)
THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE 44101261302
ALL Models(*8MPL)
OasType .at l,P .at I LP .at I LP .atl'P .at l_P .at l_P
441Ol261302 THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE [_1
Mao,o,dPress._,och'sWC_3.5I10.0 3.5I10.0 3.5I10.0 3.5I10.0 3.5I10.0 3.5I10.0
15. Circulation Air Blower Data (CFM) 1
I IIMAxO Ms
THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE 44_01261302
1
C
1
IIIMAxO Ms
44101261302 THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE [_1
N8MPN/L125J22(2)(6)
_ISMPN150J20(2)(7)*DenotesBrand
+ +
III, _
--R R-- -@ HOT END.,ERLOC.' O=O.
--o -- -_ ,EUTRAL I L SWITCH
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