International comfort products N9MP1 Installation Instructions Manual
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International comfort products N9MP1 Installation Instructions Manual

International comfort products N9MP1 Installation Instructions Manual

90+ single stage fan assisted, direct vent gas furnace
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See also: Service Manual , User's Information Manual
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. Note is used to
highlight suggestions that will result in enhanced installation, reliability, or operation.
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--05. 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, LLC
Lewisburg, TN 37091 U.S.A.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
!
Failure to follow safety
warnings exactly could result
in serious injury and/or death.
Turn Off All Power Before
Servicing.
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
3
4
7
11
29
31
!
CARBON MONOXIDE POISONING AND FIRE
HAZARD.
Failure to follow safety warnings exactly could
result in serious injury, death, and/or property
damage.
This furnace is not designed for use in mobile
homes, trailers or recreational vehicles.
7/18/2005
* Denotes Brands (C, H, T)
INSTALLER: Affix these instructions
on or adjacent to the furnace.
CONSUMER: Retain these
instructions for future reference.
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WARNING
440 01 1021 (01)
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41
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44
47

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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:...

  • Page 3: Safe Installation Requirements

    1. Safe Installation Requirements WARNING · This furnace is NOT approved for installation in mo- bile homes, trailers or recreation vehicles. FIRE, EXPLOSION, AND ASPHIXIATION HAZARD · Seal around supply and return air ducts. · Improper adjustment, alteration, service, Install correct filter type and size. maintanence or installation could cause death, ·...

  • Page 4: Installation

    Frozen Water Pipe Hazard Have someone check the structure frequently during cold weather to make sure it is warm enough to prevent pipes CAUTION from freezing. Instruct them on a service agency to call to provide service, if required. WATER DAMAGE TO PROPERTY HAZARD --or-- FaiIure to protect against the risk of freezing may Install a reliable remote sensing device that will notify some-...

  • Page 5: Installation Requirements

    This furnace is NOT to be used for temporary heat of buildings or structures under construction. Figure 2 Typical Downflow Installation Install the vent pipes as short as practical. (See Gas Vent See Vent Termination Installation section). Coupling on inside Shielding in Vent Section.
  • Page 6 Figure 3 Dimensions & Clearances AIR INTAKE MINIMUM CLEARANCES TO VENT (*9MPD) COMBUSTIBLE MATERIALS FOR ALL UNITS REAR FRONT (combustion air openings in 3² furnace and in structure) Required For Service 24² ALL SIDES Of SUPPLY PLENUM 1² SIDES LEFT SIDE VENT FRONT TRAP (COUNTERFLOW)

  • Page 7: Combustion & Ventilation Air

    Installation Positions Horizontal Furnace Installation This furnace can be installed in an upflow, horizontal (either left or right) or downflow airflow position. DO NOT install this furnace on Typical Horizontal Installation Figure 4 its back. For the upflow position, the return air ductwork can be at- tached to either the left or right side panel and/or the bottom.

  • Page 8: Outdoor Combustion Air Method

    may be necessary to resize the existing vent and chimney to pre- 4. The minimum dimension of air ducts MUST NOT be less than 3² . vent oversizing problems for the other remaining appliance(s). See “Venting and Combustion Air Check” in this section. This fur- 5.
  • Page 9 Table 1 Free Area Minimum Free Area Required for Each Opening or Duct to Outdoors BTUH BTUH Input Two Horizontal Ducts Single Opening Two Vertical Ducts or Openings Round Duct Rating (sq. in./2,000 BTUH) (sq. in./3,000 BTUH) (sq. in./4,000 BTUH) (sq.
  • Page 10 shall commence within 12² (300 mm) of the ceiling and the adequate combustion air for all appliances, MAKE THE FOL- second opening shall commence within 12² (300 mm) of the LOWING CHECK. floor. The minimum dimension of air openings shall be at least WARNING 3²...

  • Page 11: Vent & Combustion Air Piping

    4. Vent and Combustion Air Piping WARNING · Hydrochloric acid. · Sulfuric Acid. CARBON MONOXIDE POISONING HAZARD. · Solvent cements and glues Failure to properly vent this furnace could result in · Antistatic fabric softeners for clothes dryers. death or personal injury. ·...
  • Page 12 Figure 33 in “Section 5” in this manual. sized for each furnace Btuh size based on total lineal vent length For Single Pipe Installation, models N9MP1 or *9MPD, refer (on inlet or outlet side), and number of 90° elbows required. Two to Figure 8 for vent termination clearances.
  • Page 13 Direct Vent Termination Clearance Figure 7 25--24--65--2 AREA WHERE TERMINAL IS NOT PERMITED VENT TERMINAL AIR SUPPLY INLET Item Clearance Description Canadian Installation (1) U.S. Installation (2) Clearance above grade, veranda, porch, deck, balcony, or 12² (30cm) # 12² (30 cm) anticipated snow level Clearance to a window or door that may be opened 6²...
  • Page 14 Other than Direct Vent Termination Clearance Figure 8 25--24--65--2 AIR SUPPLY INLET VENT TERMINAL AREA WHERE TERMINAL IS NOT PERMITED Item Clearance Descriptions Canadian Installation (1) U.S. Installation (2) Clearance above grade, veranda, porch, deck, balcony, or 12² (30cm) # 12²...
  • Page 15 CAUTION Condensate Drain Trap FROZEN AND BURST WATER PIPE HAZARD This furnace removes both sensible and latent heat from the prod- ucts of combustion. Removal of the latent heat results in con- Failure to do so may result in burst water pipes, densation of the water vapor.
  • Page 16 Figure 9 Upflow Installations Top Vent On Some Models ONLY Single Pressure Switch Plastic Caps (2) Yellow or black Coupling & Clamps (Optional) Vent Drain & Clamps Dual Pressure Switch Detail Drain Tee Relief Tube Black Rubber ² ² ² ² ID Drain Tube Black Rubber ²...
  • Page 17 Connect the Tee trap and the main drain line exiting the casing as · A standard field supplied 2² PVC tee (N9MP1 models), or shown in Figure 18. · A 2² PVC coupling fastened onto the Drain Tee (*9MPD mod-...
  • Page 18 Figure 11 All Models Vent thru Right Side Plastic Cap Yellow or black On Some Models ONLY Relief Tube Either: The PVC Black Rubber Dual Drain Tee or a field ² ² ² ² ID Vent Drain Pressure Switch supplied 2² ² ² ² PVC Tee &...
  • Page 19 · A standard field supplied 2² PVC tee (N9MP1), or Move the caps to the top of the Trap and mount the Trap externally · A 2² PVC coupling fastened onto the Drain Tee (*9MPD to the left side of the unit using the 2 screws provided.
  • Page 20 · A standard field supplied 2² PVC tee (N9MP1 models), or hole from the burner compartment to the blower compartment and secure with screws.
  • Page 21 · A standard field supplied 2² PVC tee (N9MP1 models), or Mount the Trap externally to the bottom side of the unit using the · A 2² PVC coupling fastened onto the Drain Tee (*9MPD 2 screws provided in the location shown.
  • Page 22 Reinstall and retighten the inducer screws either: to 20² pounds torque. · A standard field supplied 2² PVC tee (N9MP1 models), or Disconnect the hoses from the Trap assembly, and remove Trap and Trap mounting bracket from the blower compartment. Using ·...
  • Page 23 Figure 16 Horizontal Right thru Top Single Pressure Switch Detail Trap Connection “Clamp ears” Alternate Orienation Pointed OUT Plastic Cap AIRFLOW Yellow or black Coupling & Clamps Preassemble & (Optional) insert into furnace Field WARNING Supplied Tee Vent Drain & Clamps Add Cap and Clamp Tee Trap...
  • Page 24 · A standard field supplied 2² PVC tee (N9MP1 models), or hole from the burner compartment to the blower compartment and A 2² PVC coupling fastened onto the Drain Tee (*9MPD ·...
  • Page 25 Important: Prime both traps with water before operation. Connecting Tee Trap to Condensate Figure 18 Failure to prime the traps may result in discharge of flue gases Trap and Main Drain Line from the condensate drain line and open tee for a period of time, and may result in temporary lockout of the furnace upon start up.
  • Page 26 furnace. PVC, CPVC, ABS, and Cellular Core pipe and cement Proper Sealing Procedure for may be used on all other joints. Figure 19 Combustion Blower WARNING Vent Pipe Rubber Coupling CARBON MONOXIDE POISONING HAZARD (Top Panel Exit) & Clamps Failure to follow this warning could result in death or NOTE: The 90°...
  • Page 27 Vertical Termination Sidewall Termination 12² or More Figure 20 Above Snow Level or Grade Level Figure 22 shows the proper installation and clearances for vertical vent termination. The vertical roof termination 8” * *18² ² ² ² Minimum for cold climates MIN.
  • Page 28 Concentric Vent and Combustion- - Rooftop Inlet Vent and Exhaust- - Figure 24 Figure 27 Air Sidewall Termination Air Termination 18² ² ² ² Min. for Cold Climates (Sustained Below 0° ° ° ° F) 8² ² ² ² Min. Inlet 20¢...

  • Page 29: Concentric Vent Termination

    5. Concentric Termination Vent Termination Clearances Vertical & Horizontal Termination WARNING Determine the pipe diameters required for the installation from Table 5 and Figure 31. Determine the best location for the termination kit. See CARBON MONOXIDE POISONING, FIRE AND Figure 30 for vertical termination or Figure 34 for horizon- EXPLOSION HAZARD tal termination.
  • Page 30 Rain Cap to Vent Pipe Assembly Concentric Vent Dimensional Figure 31 Figure 32 Drawing Drill clearance hole in rain B PVC cap and pilot hole in vent pipe. Vent/Exhaust Stainless steel screw 25--22--02 (Field supplied) ² ² ² ² PVC Intake/Combustion Air 25--22--03 WARNING Model...

  • Page 31: Gas Supply And Piping

    Install the rain cap and the small diameter pipe assembly in Concentric Vent and Combustion- - the Y concentric fitting and the large pipe assembly. Ensure Figure 33 Air Side Termination that the small diameter pipe is bottomed out and securely cemented in the Y concentric fitting.
  • Page 32 WARNING Use black iron or steel pipe and fittings or other pipe ap- proved by local code. FIRE OR EXPLOSION HAZARD Use ground joint unions and install a drip leg no less than 3² Failure to properly install metal gas connector long to trap dirt and moisture before it can enter gas valve.

  • Page 33: Electric Shock Hazard

    Additional LP Connection Requirements Manifold Gas Pressure Adjustment NOTE: Make adjustment to manifold pressure with burners oper- Have a licensed LP gas dealer make all connections at stor- ating. age tank and check all connections from tank to furnace. WARNING If copper tubing is used, it MUST comply with limitation set in National Fuel Gas Code or CGA codes.

  • Page 34: Manifold Pressure And Orifice Size

    MANIFOLD PRESSURE AND ORIFICE SIZE FOR HIGH ALTITUDE APPLICATIONS NATURAL GAS MANIFOLD PRESSURE (² ² ² ² w.c.) Table 7 Table 7 MEAN ELEVATION FEET ABOVE SEA LEVEL 0 to 2001 to 3001 to 4001 to 5001 to 6001 to 7001 to HEATING 2000...
  • Page 35 NATURAL GAS MANIFOLD PRESSURE (² ² ² ² w.c.) Table 9 FOR THE 80,000 BTUH MODEL AND ALTERNATE INPUT MODELS MEAN ELEVATION FEET ABOVE SEA LEVEL HEATING HEATING 0 to 2001 to 3001 to 4001 to 5001 to 6001 to 7001 to VALUE 2000...

  • Page 36: Electrical Wiring

    In Canada, provincial codes may govern installation of switch. Turn OFF gas supply to all appliances and start furnace. Check with governing authorities. Example Changing Orifices for High Altitude Natural Gas No. of Seconds Time Per Cubic BTU Per WARNING BTU Content Per Hour Foot in Seconds...

  • Page 37: Electrical Connections

    for the unit maximum amps stated on the rating plate. Add the full ELECTRONIC AIR CLEANER -- EAC is energized when there load amps for potential field--installed accessories such as elec- is a blower speed call, except is NOT energized when blower tronic air cleaners and humidifiers that would receive power from operates in the hard--wired continuous fan mode.

  • Page 38: Ductwork And Filter

    8. Ductwork and Filter WARNING Side Return Air Cutout Figure 41 CARBON MONOXIDE POISONING HAZARD. A = 14 ² Height of Cutout for 16² x 25² Filter Failure to properly seal duct could result in death or B = 22 ²...
  • Page 39 Side Mounted Filter Rack Figure 42 Standoff Filter Rack Figure 45 Using Optional Standoff Filter Rack 25--20--90 Filter Installation using Optional Filter Rack 25--21--45a When installing or removing a bottom mounted filter, slide the two side filter clips to the back of the furnace BEFORE installing or re- moving.
  • Page 40 Subbase for Combustible Floor The Subbase for Combustible Floors MUST be used when a downflow furnace is set on a combustible floor, even when the fur- nace is installed on a coil box. NOTE: The three(3) screws in the top panel of the furnace next to Cut the opening in the floor according to Table 11.

  • Page 41: Checks And Adjustments

    This subbase for combustible floors has been designed so that the Figure 48 Setting the Subbase height of the subbase raises the downflow coil off the floor to allow easy installation of the condensate drain. See Figure 49. Furnace Figure 49 Condensate Line Raised by Base Installation of Combustible...

  • Page 42: Temperature Rise Check

    CAUTION Figure 51 Ignitor Location REDUCED FURNACE LIFE HAZARD Failure to properly set the air temperature rise may result in reduced furnace life. Use ONLY the following blower motor speed taps for setting air temperature rise. Blower Motor Speed Taps Model Sizes Hi (BLK) Med--Hi (O)

  • Page 43: Furnace Maintenance

    taps. When the low speed blower lead is connected to this termi- minal at the furnace control. The appropriate motor leads should nal, this will provide low speed blower operation whenever the oth- already be connected to the “Heat” and “Cool” terminals. er two speeds (Heat or Cool) are not energized.

  • Page 44: Sequence Of Operation & Diagnostics

    11. Sequence of Operation & Diagnostics The following is the normal operating sequence. Cooling (Y) Request: 24VAC signals applied to Y & G terminals of FCB (furnace control board) · Cool motor speed is energized after 5 second Cool Fan On Delay time. Y &...
  • Page 45 Heating Request with Gas Shut Off: 24 VAC signal applied to W terminal of FCB. The FCB will attempt 4 cycles for ignition then go to soft lockout for 3 hours then try for ignition again as long as the heat call remains. Power reset will clear lockout.
  • Page 46 440 01 1021 01...

  • Page 47: Technical Support

    N9MP2050B12C1 N9MP2075B12C1 N9MP2080F16C1 N9MP2100F14C1 N9MP2100J20C1 N9MP2125J20C1 Dual Certified *9MPD050F12C1 *9MPD075F12C1 *9MPD080J16C1 *9MPD100J14C1 *9MPD100J20C1 *9MPD125L20C1 * Denotes Brand International Comfort Products, LLC Lewisburg, TN 37091 Fast Parts Division 866- -380- -3278 Save This Manual For Future Reference 440 01 1021 01...
  • Page 48 Model Specifications Manufacturers Number (Mfr No - -See Rating Plate) ALL Models Specifications (N9MP1) N9MP1050B12C N9MP1075B12C N9MP1080F16C N9MP1100F14C N9MP1100J20C N9MP1125J20C General Gas Type Nat./ LP Nat./ LP Nat./ LP Nat./ LP Nat./ LP Nat./ LP Input (Btuh) 50,000 75,000 80,000...
  • Page 49 Manufacturers Number (Mfr No - -See Rating Plate) ALL Models Specifications (N9MP2) N9MP2050B12C N9MP2075B12C N9MP2080F16C N9MP2100F14C N9MP2100J20C N9MP2125J20C 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 50 Manufacturers Number (Mfr No - -See Rating Plate) ALL Models Specifications (*9MPD) *9MPD050F12C *9MPD075F12C *9MPD080J16C *9MPD100J14C *9MPD100J20C *9MPD125L20C 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 51 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...

  • Page 52: Wiring Diagram

    Wiring Diagram FURNACE CONTROL J1 COOL ON DELAY: 5 SEC COOL OFF DELAY: 90 SEC HEAT ON DELAY: 30 SEC EAC + HUM 1.0A MAX COMBINED HEAT HEAT HEAT HEAT OFF-DELAY OFF-DELAY OFF-DELAY OFF-DELAY C AP AC IT OR P R INT E D C IR C UIT B OAR D NOT E #5 NOT E #2...
  • Page 53 N9MP1, N9MP2 or *9MPD 440 01 1021 01...
  • Page 54 Replacement Parts - N9MP1 & N9MP2 Models N9MP1050B12C1, N9MP1075B12C1, N9MP1080F16C1, N9MP1100F14C1, N9MP1100J20C1 & N9MP1125J20C1 -- N9MP2050B12C1, N9MP2075B12C1, N9MP2080F16C1, N9MP2100F14C1, N9MP2100J20C1 & N9MP2125J20C1 (Natural Gas) Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
  • Page 55 Replacement Parts - N9MP1 & N9MP2 Models N9MP1050B12C1, N9MP1075B12C1, N9MP1080F16C1, N9MP1100F14C1, N9MP1100J20C1 & N9MP1125J20C1 -- N9MP2050B12C1, N9MP2075B12C1, N9MP2080F16C1, N9MP2100F14C1, N9MP2100J20C1 & N9MP2125J20C1 (Natural Gas) Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
  • Page 56 Replacement Parts - N9MP1 & N9MP2 Models N9MP1050B12C1, N9MP1075B12C1, N9MP1080F16C1, N9MP1100F14C1, N9MP1100J20C1 & N9MP1125J20C1 -- N9MP2050B12C1, N9MP2075B12C1, N9MP2080F16C1, N9MP2100F14C1, N9MP2100J20C1 & N9MP2125J20C1 (Natural Gas) Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
  • Page 57 Replacement Parts - N9MP1 & N9MP2 Models N9MP1050B12C1, N9MP1075B12C1, N9MP1080F16C1, N9MP1100F14C1, N9MP1100J20C1 & N9MP1125J20C1 -- N9MP2050B12C1, N9MP2075B12C1, N9MP2080F16C1, N9MP2100F14C1, N9MP2100J20C1 & N9MP2125J20C1 (Natural Gas) Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
  • Page 58 Replacement Parts - *9MPD Models -- *9MPD050F12C1, *9MPD075F12C1, *9MPD080J16C1, *9MPD100J14C1, *9MPD100J20C1 & *9MPD125L20C1 (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 050F12C 075F12C 080J16C 100J14C 100J20C...
  • Page 59 Replacement Parts - *9MPD Models -- *9MPD050F12C1, *9MPD075F12C1, *9MPD080J16C1, *9MPD100J14C1, *9MPD100J20C1 & *9MPD125L20C1 (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 050F12C 075F12C...
  • Page 60 Replacement Parts - *9MPD Models -- *9MPD050F12C1, *9MPD075F12C1, *9MPD080J16C1, *9MPD100J14C1, *9MPD100J20C1 & *9MPD125L20C1 (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 050F12C 075F12C...
  • Page 61 Replacement Parts - *9MPD Models -- *9MPD050F12C1, *9MPD075F12C1, *9MPD080J16C1, *9MPD100J14C1, *9MPD100J20C1 & *9MPD125L20C1 (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 050F12C 075F12C...

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