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Recognize safety information. This is the safety--alert symbol
the potential for personal injury.
Understand the signal words DANGER, WARNING, or CAUTION. These words are used with the safety--alert symbol. DANGER identifies the
most serious hazards, those that will result in severe personal injury or death. WARNING signifies a hazard that could result in personal injury or
death. CAUTION is used to identify unsafe practices that could result in minor personal injury or product and property damage.
Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should
install, repair, or service heating equipment.
Untrained service personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels attached
to or shipped with the unit and other safety precautions that may apply.
Follow all safety codes. In the United States, follow all safety codes including the current edition National Fuel Gas Code (NFGC) ANSI
Z223.1--2002/NFPA No. 54--2002. In Canada, refer to the current edition of the National Standard of Canada Natural Gas and Propane Installation
Code (NSCNGPIC) CSA B149.1--00. Wear safety glasses and work gloves. Have fire extinguisher available during start--up and adjustment
procedures and service calls.
These instructions cover minimum requirements and conform to existing national standards and safety codes. In some instances, these instructions
exceed certain local codes and ordinances, especially those that may not have kept up with changing residential construction practices. We require
these instructions as a minimum for a safe installation.
International Comfort Products Corporation (USA)
Lewisburg, TN 37091 U.S.A.
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Electric Shock Hazard
Turn Off All Power Before Servicing.
Failure to do so can result in death,
personal injury and/or property
damage.
Printed in U.S.A.
SAFETY REQUIREMENTS
Table of Contents
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!
N9MP1 & N9MP2
*9MPD
FAN ASSISTED, DIRECT
VENT GAS FURNACE
!
. When you see this symbol on the furnace and in instructions manuals be alert to
INSTALLER: Affix these instructions
on or adjacent to the furnace.
CONSUMER: Retain these
instructions for future reference.
3
4
7
10
26
30
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FIRE OR EXPLOSION HAZARD
This furnace is not designed for use in mobile
homes, trailers or recreational vehicles.
Such use could result in death, bodily injury
and/or property damage.
4/28/2003
* Denotes Brands (C, H, T)
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440 01 1020 (02)
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Summary of Contents for Sears N9MP1
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Page 1: Table Of Contents
N9MP1 & N9MP2 *9MPD * Denotes Brands (C, H, T) FAN ASSISTED, DIRECT VENT GAS FURNACE SAFETY REQUIREMENTS Recognize safety information. This is the safety--alert symbol . When you see this symbol on the furnace and in instructions manuals be alert to the potential for personal injury. - Page 2 START- -UP CHECK SHEET For 90+ Furnace (Keep this page for future reference) Dealer Name: Address: Business Card Here City, State(Province), Zip or Postal Code: Phone: Owner Name: Manual Gas Shut--Off Upstream of Furnace/Drip--Leg? Address: Condensate Drain Connected? City, State(Province), Zip or Postal Code: Condensate Drain Trapped? Transition Pressure switch hose relocated for U/D/H Model Number:...
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Page 3: Safe Installation Requirements
1. Safe Installation Requirements · Unit MUST be installed so electrical components are pro- tected from direct contact with water. Safety Rules DEATH, PERSONAL INJURY AND/OR PROPERTY DAMAGE Your unit is built to provide many years of safe and dependable ser- Failure to carefully read and follow all instructions vice providing it is properly installed and maintained. -
Page 4: Installation
If your furnace remains off for an extended time, the pipes in your Install a reliable remote sensing device that will notify some- home could freeze and burst, resulting in serious water damage. body of freezing conditions within the home. Water may create a condition in which mold can grow in your home. -
Page 5: Installation Positions
preferred method is to use an angle iron frame bolted to the Figure 2 Typical Downflow Installation rafters or joists. See Vent Termination This furnace may be used for construction heat provided that: Coupling on inside Shielding in Vent Section. and outside of wall ·... - Page 6 Dimensions & Clearances Figure 3 Cabinet to Combustible Clearances AIR INTAKE BOT. BACK FRONT FLUE VENT (*9MPD) ² ² ² ² ² ² ² FRONT LEFT SIDE TRAP (COUNTERFLOW) ELECTRICAL VENT AIR INTAKE (ALTERNATE) TRAP UPFLOW/HORIZONTAL THERMOSTAT BOTTOM TYP. RIGHT SIDE Cabinet Cabinet Bottom...
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Page 7: Combustion & Ventilation Air
Leveling combustion air pipes attach to the furnace through the alternate locations on the furnace side panels. Proper leveling of the furnace must be provided to insure proper Note: On the Direct Vent furnace, the vent pipe attaches to the fur- drainage of the condensate from the furnace. - Page 8 Figure 5 illustrate how to provide combustion and ventila- One opening MUST be within 12² of the floor and the second tion air. A minimum of two permanent openings, one inlet opening within 12² of the ceiling. and one outlet, are required. Outside Air (This is ONLY a guide.
- Page 9 Install air intake a minimum of 12² above maximum snow level and clear of any obstruction. Duct or ventilation open- ing requires one square inch of free area per 4,000 BTUH of CARBON MONOXIDE POISONING HAZARD total input rating for all gas appliances in area. Failure to follow the steps outlined below for each Air inlet MUST be screened with not less than ²...
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Page 10: Vent & Combustion Air Piping
This furnace is approved for venting with Schedule 40 PVC, CPVC, ABS, Cellular Core pipe fittings and SDR--26 PVC. Single Pipe (N9MP1 Models) NOTE: All PVC, CPVC, ABS, and Cellular Core pipe fittings, sol- This furnace is certified as a category IV appliance. This furnace... - Page 11 The vent termination must be located at least 12² above Pipe Diameter Table Table 3 ground or normally expected snow accumulation levels. N9MP1 & *9MPD Models Do NOT terminate over public walkways. Avoid areas where 50,000, 75,000 & 80,000 Btuh Furnaces condensate may cause problems such as above planters, 40¢...
- Page 12 ² may also be used, as allowed by local codes. Alternate drain Vent Termination Clearances Figure 7 pipes and hoses may be used as allowed by local codes. (United States Only) The drain line must maintain a ² per foot downward slope toward the drain.
- Page 13 Figure 8 Upflow Installations Top Vent On Some Models ONLY Yellow or black Plastic Caps (2) Coupling & Clamps (Optional) Vent Drain & Clamps Dual Pressure Switch Detail Single Pressure Switch ² ² ² ² ID Rubber Tube Drain Tee ²...
- Page 14 · A standard field supplied 2² PVC tee (N9MP1 and 2 models), Connect the Tee trap and the main drain line exiting the casing as shown in Figure 17.
- Page 15 Connect the Tee trap and the main drain line exiting the casing as · A standard field supplied 2² PVC tee (N9MP1 and 2 mod- shown in Figure 17. els), or Note: It is recommended that all PVC piping and fitting connec- ·...
- Page 16 · A standard field supplied 2² PVC tee (N9MP1 and 2 mod- Move the caps to the top of the Trap and mount the Trap externally els), or to the left side of the unit using the 2 screws provided.
- Page 17 · A standard field supplied 2² PVC tee (N9MP1 and 2 mod- hole from the burner compartment to the blower compartment and els), or secure with screws.
- Page 18 · A standard field supplied 2² PVC tee (N9MP1 and 2 mod- Mount the Trap externally to the bottom side of the unit using the els), or 2 screws provided in the location shown.
- Page 19 Reinstall and retighten the inducer screws to either: 20² pounds torque. A standard field supplied 2² PVC tee (N9MP1 and 2 mod- · Disconnect the hoses from the Trap assembly, and remove Trap els), or and Trap mounting bracket from the blower compartment.
- Page 20 Figure 15 Horizontal Right thru Top Single Pressure Switch Detail Trap Connection “Clamp ears” Alternate Orienation Pointed OUT Yellow or black AIR FLOW Plastic Cap Preassemble & insert into furnace Coupling & Clamps (Optional) Vent Drain & Clamps Field WARNING Supplied Tee Add Cap and Clamp...
- Page 21 Trap mounting bracket from the blower compartment. Using cover plate and gasket provided in the loose parts bag, cover the · A standard field supplied 2² PVC tee (N9MP1 and 2 mod- hole from the burner compartment to the blower compartment and els), or secure with screws.
- Page 22 Figure 17 Connecting Tee Trap to Condensate Trap and Main Drain Line Open Tee Tee Trap Condensate Trap Evaporator Coil Drain Line (Optional) Main Drain Line 25--24--41N Connecting Vent and Combustion Air Piping The Tee Trap must be connected to the main condensate drain line as conceptually shown above.
- Page 23 The air intake coupling is sized for 2² PVC pipe. NOTE: All PVC, CPVC, ABS, and Cellular Core pipe fittings, sol- vent cement, primers and procedures MUST conform to American Install the combustion air pipe to the air intake coupling using RTV National Standard Institute and American Society for Testing and sealant to provide for future serviceability.
- Page 24 Vertical Termination Sidewall Termination 12² or More Figure 19 Above Snow Level or Grade Level Figure 21 shows the proper installation and clearances for vertical vent termination. The vertical roof termination 8” * *18² ² ² ² Minimum for cold climates should be sealed with a plumbing roof boot or equivalent MIN.
- Page 25 Concentric Vent and Combustion- - Rooftop Inlet Vent and Exhaust- - Figure 23 Figure 26 Air Sidewall Termination Air Termination 18² ² ² ² Min. for Cold Climates (Sustained Below 0° ° ° ° F) 8² ² ² ² Min. 20¢...
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Page 26: Gas Supply And Piping
5. Gas Supply and Piping Table 6 Gas Pressures Below 2000¢ ¢ ¢ ¢ CARBON MONOXIDE POISONING, FIRE AND EX- Manifold Supply Pressure PLOSION HAZARD. Type Pressure Recommended Max. Min. Failure to follow these instructions can result in Natural 7² 14²... - Page 27 MANIFOLD PRESSURE AND ORIFICE SIZE FOR HIGH ALTITUDE APPLICATIONS Table 7 NATURAL GAS Elevation Above Sea Level Heat Value Heat Value 0- -1999 2000- -2999 3000- -3999 4000- -4999 5000- -5999 6000- -6999 7000- -7999 Btu/Cu.Ft. (² ² ² ² × × × × wc) (²...
- Page 28 Figure 29 Typical Gas Piping for Upflow Gas Pipe Grommet (Single Pipe) Drip Leg and Union, Union* should be outside the cabinet. Manual shut- off valve MUST be upstream of dripleg, union, and furnace. Manual shut- off valve Use elbows and 3² ² ² ² pipe nipple to connect valve to piping when using right side gas pipe entry.
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Page 29: Electrical Wiring
If copper tubing is used, it MUST comply with limitation set in National Fuel Gas Code or CGA codes. If a flexible connector is required or allowed by authority Two--stage regulation of LP gas is recommended. having jurisdiction, black iron pipe shall be installed at gas valve and extended a minimum of 2²... -
Page 30: Ductwork And Filter
Control Center Fuse Figure 31 Electrical Connections The 24V circuit contains a 5--amp, automotive--type fuse located NOTE: Junction Box can be mounted to either the left or right on fan timer board. (See Figure 32) Any electrical shorts of 24V side. - Page 31 For side connections using a 16² x 25² filter, cut out the em- Side Mounted Filter Rack Figure 34 bossed area shown in Figure 33. This will provide a 14 ² x ² approximate opening. Side Return Air Cutout Figure 33 A = 14 ²...
- Page 32 Combustible Floor Installation CAUTION If filters are only suitable for heating application, advise homeowner that filter size may need to be increased if air conditioning is added. FIRE HAZARD Failure to install unit on noncombustible subbase can Addition Of Air Conditioning result in death, personal injury and/or property damage.
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Page 33: Checks And Adjustments
Position furnace or coil cabinet and furnace on subbase so it Figure 39 aligns between the locating tabs. Setting the Subbase Figure 37 Furnace Subbase Furnace Installation of Combustible Floor Base Plenum 2” Wood Floor Plenum 2” 25--20--46a 1” Wood Screw Combustible Floor Base This subbase for combustible floors has been designed so that the... -
Page 34: Main Burner Flame Check
Turn gas ON and remove adjustment screw cover on gas Place thermometers in supply and return air registers as valve. Turn counterclockwise to decrease pressure and close to furnace as possible, avoiding direct radiant heat clockwise to increase. from heat exchangers. Operate furnace continuously for 15 minutes with all regis- For altitudes up to 2000¢, set pressure to value shown in ters and duct dampers open. -
Page 35: Continuous Fan Operation
Separate speed selections for Heat, Cool, and If the same speed must be used for both heating and cool- ing, remove the undesired motor speed lead from the “Heat” Continuous Fan or “Cool” terminal and connect that lead to the open termi- nal at “Unused Motor Lead”... - Page 36 · Following a 3 second prepurge delay, the pilot valve opens and the ignitor begins to warm up. · The ignitor glows red--hot for 30 seconds, then turns off. · The igniter stays off for 25 seconds, then begins to warm--up again. ·...
- Page 37 HONEYWELL SV9541M “SMART VALVE” Sequence of Operation POWER APPLIED TO APPLIANCE THERMOSTAT CALLS FOR HEAT PRESSURE SWITCHES PROVED OPEN? WAIT FOR PRESSURE SWITCHES TO OPEN COMBUSTION BLOWER ENERGIZED COMBUSTION BLOWER DE- ENERGIZED FIVE MINUTE WAIT PERIOD PRESSURE SWITCHES CLOSED WITHIN 30 SEC- ONDS? 3 SECOND PRE- PURGE PILOT VALVE OPENS:...
- Page 38 HONEYWELL SV9541M “SMART VALVE” Trouble shooting The 6 + X designation indicates a combination of flash codes: 6 flashes shows the control is in soft lockout, followed by X flashes to indicate the reason the control went into soft lockout. Last status code indicates repair to address first INDICATES CHECK/REPAIR STATUS...
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Page 39: Concentric Vent Termination
HONEYWELL SV9541M “SMART VALVE” Trouble shooting continued INDICATES CHECK/REPAIR STATUS Soft Lockout. Last failure was pressure switch Ignition system control switch must be in the ON position. Maximum recycle count exceeded 6 Flashes Pressure switches operation, tubing, and wiring. 3 Flashes Restrictions in furnace air intake or vent piping. - Page 40 Vertical termination is preferred. Field supplied pipe and fittings are Concentric Vent Dimensional Figure 46 required to complete the installation. Drawing Figure 44 Kit Components B PVC Vent/Exhaust Kit Contents: 3² ² ² ² Rain Cap or 2² ² ² ² Rain Cap 3²...
- Page 41 Concentric Termination Kit Table 11 NAHA001CV & NAHA002CV Venting Table for N9MP2 Models CARBON MONOXIDE POISONING HAZARD 50,000 & 80,000 Btuh Furnaces Failure to follow this warning could result in death, personal injury and/or property damage. NAHA002CV - - 35¢ & (4) 90° elbows with 2² PVC pipe or NAHA001CV - - 65¢...
- Page 42 Install the rain cap and the small diameter pipe assembly in Concentric Vent Sidewall the Y concentric fitting and the large pipe assembly. Ensure Figure 49 Attachment that the small diameter pipe is bottomed out and securely cemented in the Y concentric fitting. Cement the furnace combustion air and vent pipes to the Strap concentric vent termination assembly.
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Page 43: Tech Support And Parts
Four Position Furnace Models Single Pipe N9MP1050B12B1 N9MP1075B12B1 N9MP1080F16B1 N9MP1100F14B1 N9MP1100J20B1 N9MP1125J20B1 Two Pipe N9MP2050B12B1 N9MP2075B12B1 N9MP2080F16B1 N9MP2100F14B1 N9MP2100J20B1 N9MP2125J20B1 Dual Certified *9MPD050F12B1 *9MPD075F12B1 *9MPD080J16B1 *9MPD100J14B1 25- -23- -30 *9MPD100J20B1 *9MPD125L20B1 Denotes Brand International Comfort Products Corporation (USA) Lewisburg, TN 37091 USA Fast Parts Division 615- -248- -8300 Save This Manual For Future Reference... - Page 44 Manufacturers Number (Mfr No - -See Rating Plate) ALL Models Specifications (N9MP1) N9MP1050B12B N9MP1075B12B N9MP1080F16B N9MP1100F14B N9MP1100J20B N9MP1125J20B General Gas Type Nat./ LP Nat./ LP Nat./ LP Nat./ LP Nat./ LP Nat./ LP Input (Btuh) 50,000 75,000 80,000 100,000 100,000...
- Page 45 Manufacturers Number (Mfr No - -See Rating Plate) ALL Models Specifications (N9MP2) N9MP2050B12B N9MP2075B12B N9MP2080F16B N9MP2100F14B N9MP2100J20B N9MP2125J20B General Gas Type Nat./ LP Nat./ LP Nat./ LP Nat./ LP Nat./ LP Nat./ LP Input (Btuh) 50,000 75,000 80,000 100,000 100,000 125,000 Output (Btuh) 45,500...
- Page 46 Manufacturers Number (Mfr No - -See Rating Plate) ALL Models Specifications (*9MPD) *9MPD050F12B *9MPD075F12B *9MPD080J16B *9MPD100J14B *9MPD100J20B *9MPD125L20B General Gas Type Nat./ LP Nat./ LP Nat./ LP Nat./ LP Nat./ LP Nat./ LP Input (Btuh) 50,000 75,000 80,000 100,000 100,000 125,000 Output (Btuh) 46,000...
- Page 47 CIRCULATION AIR BLOWER DATA For 050 Models 3 Ton Units For 080 Models 4 Ton 19² ² ² ² & 22 ² ² ² ² Units Speed Speed Med L Med H Med L Med H 1083 1301 1408 1109 1527 1850 1050...
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Page 48: Wiring Diagram
1. Wiring Diagram 440 01 1020 02... - Page 49 2. N9MP1, N9MP2 or *9MPD 440 01 1020 02...
- Page 50 Replacement Parts - N9MP1 & N9MP2 Models N9MP1050B12B1, N9MP1075B12B1, N9MP1080F16B1, N9MP1100F14B1, N9MP1100J20B1 & N9MP1125J20B1 -- N9MP2050B12B1, N9MP2075B12B1, N9MP2080F16B1, N9MP2100F14B1, N9MP2100J20B1 & N9MP2125J20B1 (Natural Gas) Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
- Page 51 Replacement Parts - N9MP1 & N9MP2 Models N9MP1050B12B1, N9MP1075B12B1, N9MP1080F16B1, N9MP1100F14B1, N9MP1100J20B1 & N9MP1125J20B1 -- N9MP2050B12B1, N9MP2075B12B1, N9MP2080F16B1, N9MP2100F14B1, N9MP2100J20B1 & N9MP2125J20B1 (Natural Gas) Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
- Page 52 Replacement Parts - N9MP1 & N9MP2 Models N9MP1050B12B1, N9MP1075B12B1, N9MP1080F16B1, N9MP1100F14B1, N9MP1100J20B1 & N9MP1125J20B1 -- N9MP2050B12B1, N9MP2075B12B1, N9MP2080F16B1, N9MP2100F14B1, N9MP2100J20B1 & N9MP2125J20B1 (Natural Gas) Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
- Page 53 Replacement Parts - N9MP1 & N9MP2 Models N9MP1050B12B1, N9MP1075B12B1, N9MP1080F16B1, N9MP1100F14B1, N9MP1100J20B1 & N9MP1125J20B1 -- N9MP2050B12B1, N9MP2075B12B1, N9MP2080F16B1, N9MP2100F14B1, N9MP2100J20B1 & N9MP2125J20B1 (Natural Gas) Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
- Page 54 Replacement Parts - *9MPD Models -- *9MPD050F12B1, *9MPD075F12B1, *9MPD080J16B1, *9MPD100J14B1, *9MPD100J20B1 & *9MPD125L20B1 (Natural Gas) *Denotes Brand Replacement part supplied will be current active part. For parts not listed, consult place of purchase. Description Part *9MPD Functional Number 050F12B 075F12B 080J16B 100J14B 100J20B...
- Page 55 Replacement Parts - *9MPD Models -- *9MPD050F12B1, *9MPD075F12B1, *9MPD080J16B1, *9MPD100J14B1, *9MPD100J20B1 & *9MPD125L20B1 (Natural Gas) *Denotes Brand Replacement part supplied will be current active part. For parts not listed, consult place of purchase. *9MPD Description Description Part Part Non- Functional Number 050F12B 075F12B...
- Page 56 Replacement Parts - *9MPD Models -- *9MPD050F12B1, *9MPD075F12B1, *9MPD080J16B1, *9MPD100J14B1, *9MPD100J20B1 & *9MPD125L20B1 (Natural Gas) *Denotes Brand Replacement part supplied will be current active part. For parts not listed, consult place of purchase. *9MPD Description Description Part Part Non- Functional Number 050F12B 075F12B...
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