ICP F9MXT Installation Insrtuctions

ICP F9MXT Installation Insrtuctions

Variable speed motor, two-stage ecm motor and singe-stage 35" tall, high efficiency condensing gas furnace
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HJJ(J|)li_(i)))_J))1))
These instructions must be read and understood completely before attempting installation.
Safety Labeling and Signal Words
DANGER,
WARNING,
CAUTION,
and NOTE
The
signal
words
DANGER,
WARNING,
CAUTION,
and NOTE are used to identify levels of
hazard seriousness.
The signal word DANGER
is
only used on product labels to signify an immediate
hazard.
The signal words WARNING,
CAUTION,
and NOTE
will be used
on product
labels
and
throughout
this manual and other manual that may
apply to the product.
DANGER
- Immediate
hazards which will result in
severe personal
injury or death.
Signal
Words
in Manuals
The signal word WARNING
is used throughout
this manual
in the following
manner:
The signal word CAUTION
is used throughout
this manual
in the following
manner:
WARNING
- Hazards
or unsafe
practices
which
could result in severe personal
injury or death.
CAUTION
- Hazards
or unsafe
practices
which
may result in minor
personal
injury or product
or
property
damage.
NOTE - Used to highlight
suggestions
which will
result
in
enhanced
installation,
reliability,
or
operation.
TABLE
OF CONTENTS
Signal
Words
on Product
Labeling
Signal words are used in combination
with
colors and/or
pictures
or product
labels.
Zt&
Safety-alert
symbol
When you see this symbol
on the unit and in
instructions
or
manuals,
be alert
to
the
potential for personal
injury.
SAFETY CONSIDERATIONS
..............................
3
INTRODUCTION
.........................................
4
CODES AND STANDARDS
................................
4
ELECTROSTATIC
DISCHARGE
(ESD)
.....................
5
DIMENSIONS
...........................................
6
LOCATION RELATIVE TO COOLING EQUIPMENT
...........
8
AIR FOR COMBUSTION
AND VENTILATION
................
9
CONDENSATE
TRAP
....................................
12
INSTALLATION
..........................................
19
UPFLOW INSTALLATION
.................................
19
DOWNFLOW
INSTALLATION
..............................
20
HORIZONTAL
INSTALLATION
.............................
21
AIR DUCTS
.............................................
27
GAS PIPING .............................................
27
ELECTRICAL
CONNECTIONS
.............................
29
J-BOX
INSTALLATION
...................................
31
VENTING
...............................................
36
SPECIAL VENTING REQUIREMENTS
FOR
INSTALLATIONS
IN CANADA
.............................
36
DIRECT VENT / 2-PIPE SYSTEM ..........................
40
VENTILATED
COMBUSTION
AIR ..........................
4t
TERMINATION
REQUIREMENTS
FOR THE PROVINCES
OF ALBERTA AND SASKATCHEWAN
......................
4t
INSTALLING THE VENT TERMINATION
....................
50
MAXIMUM EQUIVALENT
VENT LENTH .....................
55
MAXIMUM ALLOWABLE
EXPOSED VENT LENGTHS
........
58
(SO9001)
Use of the AHR( Certified TM Mark indicates a
manufacturer's
participation
in the program.
For verification
of certification
for individual
products,
go to www.ahridirectory.org
.
INSTALLER:
Affix these instructions on or adjacent to the
furnace.
CONSUMER:
Retain
these
instructions
for
future
reference.
Portions
of the text and tables are reprinted from NFPA 54/ANS(
Z223.1-2009_<;P, with permission
of National
Fire Protection
Association,
Quincy, MA 02269 and American
Gas Association,
Washington,
DC
20001.
This reprinted
material is not the complete
and official position of the NFPA or ANSI, on the referenced
subject,
which is represented
only
by the standard
in its entirety.
Printed i nU.S.A.
440 01 4001 04
July 2012

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  • Page 1 HJJ(J|)li_(i)))_J))1)) These instructions must be read and understood completely before attempting installation. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE Signal Words in Manuals signal words DANGER, WARNING, The signal word WARNING is used throughout CAUTION, and NOTE are used to identify levels of this manual in the following manner:...
  • Page 2: Installations

    Required Notice for Massachusetts Installations Important The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA-54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet...
  • Page 3: Safety Considerations

    changing residential construction practices. We require these Safety Considerations instructions as a minimum for a safe installation. Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit.
  • Page 4: Codes And Standards

    accessory gas conversion kit is required to convert For accessory installation details, refer to the applicable instruction literature. furnace for use with propane gas. See Table 1 for required clearances to combustible NOTE: Remove all shipping materials, parts assemblies construction. literature before operating the furnace.
  • Page 5: Combustion And Ventilation Air

    Combustion and Ventilation Air Disconnect power furnace. Multiple disconnects may be required. DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE • US: Section 9.3 ofthe NFPA54/ANSI Z223.1-2009, CONTROL PRIOR TO DISCHARGING YOUR BODY'S Air for Combustion and Ventilation ELECTROSTATIC CHARGE TO GROUND.
  • Page 6 Figure 2 1Dimensions 6 15/16 NOTES: 11761] 23/10 1. Doors may vary by model. _ [584] 2. Minimum return-air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer's recommendations for equivalent diameters. a. For 800 CFM-16-in. (406 mm) round or 14 1/2 x 12-in.
  • Page 7 be located close to the chimney or vent and attached to an Location air distribution system. Refer to Air Ducts section. be provided ample space for servicing and cleaning. Always comply with minimum fire protection clearances shown in Table 1 or on the furnace clearance PERSONAL INJURY AND/OR PROPERTY DAMAGE...
  • Page 8: Fire Hazard

    Figure 3 1Multipoise Orientations AIRFLOW THE BLOWER IS LOCATED BELOW THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED UPWARD. THE BLOWER IS LOCATED TO THE RIGHT OF THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED TO THE LEFT. HORIZONTAL RIGHT1AIF F_LC w THE BLOWER IS THE BLOWER IS LOCATED TO THE LEFT...
  • Page 9: Air For Combustion And Ventilation

    Air for Combustion and Ventilation CARBON MONOXIDE POISONING HAZARD Introduction Failure to follow this warning could result in personal injury or death. Direct Vent (2-pipe) Applications The operation of exhaust fans, kitchen ventilation fans, When the furnace is installed as a direct vent (2-pipe) furnace, clothes dryers, attic exhaust...
  • Page 10 Indoor Combustion Air ° NFPA & AGA and 2. Determine the minimum required volume for each appliance in the space and add the volumes together to get the Standard and Known-Air-Infiltration Rate total minimum required volume for the space. Methods Table 4 - Minimum Space Volumes were determined...
  • Page 11: Combination Of Indoor And Outdoor Air

    Combination of Indoor and Outdoor Air Air for Combustion, Ventilation, Figure 7 and Dilution from Indoors Indoor openings shall comply with Indoor Combustion Air Method below and, CIRCULATING AIR VENT Outdoor openings shall be located as required in the DUCTS Outdoor Combustion Air Method mentioned previously and,...
  • Page 12: Condensate Trap

    Table 4 Minimum Space Volumes for 100% Combustion, Ventilation and Dilution Air from Outdoors OTHER THAN FAN-ASSISTED TOTAL FAN-ASSISTED TOTAL (1,000'S BTUH GAS INPUT RATE) (1,000'S BTUH GAS INPUT RATE) 1 O0 Space Volume Ft 3 (M 3) 1,050 1,400 1,750 1,400 1,500...
  • Page 13 Figure 9 Unconverted Factory Configuration as viewed in the Downflow Orientation Remove pressure switch tube from front pressure switch and discard. A new tube is shipped in the loose parts Remove tube from relief port. tief emovethe screw that secures the trap to the collector box and remove trap.
  • Page 14 Condensate Trap - Horizontal Orientation The condensate trap extends below the side of the When the furnace is installed in the horizontal right position, the casing in the horizontal position. A minimum of 2-in. condensate trap will be initially located at the bottom of the (51 mm) of clearance is required between...
  • Page 15 Horizontal R ightTrap Configuration(CONTINUED) NOTE: Remove knockout in casing before re-installing the condensate trap. Slide relief tube in stand-offs to adjust length. Vent elbow shown in alternate orientation. Tighten clamp on trap with screw to ttach condensate inlet to vent elbow 15 lb.-in. collector box.
  • Page 16: Condensate Drain Connection

    Horizontal Left Trap Configuration (CONTINUED) NOTE: Remove knockout in casing before re-installing condensate trap. Install two plugs previously removed in open ports on collector box. Rotate elbow to desired position "_ and torque clamp Connect relief tube to port on inlet 15 lb.-in. on collector box.
  • Page 17 7. Install the adapter or connect the 1/2-in. CPVC pipe by pipe to temporarily rest on the blower shelf (upflow) or sliding a spring clamp over the open end of the grommet burner (downflow). (NOTE: When inducer on the outside of the furnace casing. housing has been removed to ease installation in upflow applications, this step is not needed.) 8.
  • Page 18: Cut Hazard

    3. Remove the knock-out for the condensate trap in the Figure Modify Rubber Drain Elbow side of the casing. Cut line for left side condensate drain. 4. Install the drain trap grommet in the casing, if required for Do not discard parts after cutting, direct-vent applications.
  • Page 19: Supply Air Connections

    Figure16 Formed Rubber Drain Grommet Figure 1Furnace Pitch Requirements INSTALL CLAMPS ON DRAIN ELBOW LEVEL 0-IN. (0 MM) TO ATTACH DRAIN ELBOW CONDENSATE 1/2-iN. (13 MM) MAX DRAIN TRAP PULL DRAIN STUB MIN 1/4-1N.(6 MM) TO THROUGH CASING, l/2qN. (13 MM) MAX UPFLOW OR DOWNFLOW HORIZONTAL...
  • Page 20: Downflow Installation

    Install another nut on other side of furnace base. (Install Figure JRemoving Bottom Closure Panel flat washer if desired.) • Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement. ,d,°f Reinstall bottom closure panel if removed. DOWN FLOW INSTALLATION NOTE: The furnace must be pitched as shown in Figure 18 for proper condensate...
  • Page 21: Horizontal Installation

    subbase, or a factory-approved air conditioning coil casing. DO NOT cut main furnace casing to attach supply air duct, humidifier, or other accessories. All supply-side accessories FIRE, EXPLOSION, CARBON MONOXIDE MUST be connected to duct external to furnace casing. POISONING HAZARD Return Air Connections Failure to follow this warning could result in personal...
  • Page 22 i Table 5 Opening Dimensions - in. (mm) FURNACE PLENUM OPENING FLOOR OPENING CASI NG WIDTH APPLICATION IN, (mm) 12-11/1 Upflow Applications on Combustible or Noncombustible Flooring 21-5/8 13-5/16 22-1/4 (subbase not required) (322) (549) (338) (565) Downflow Applications on Noncombustible Flooring 12-9/16 13-3/16...
  • Page 23: Rollout Protection

    Figure 25 _Suspended Furnace Installation (SEE VENTING SECTION) VENT NOTE: EXTEND ANGLE NOTES: 1. A 1 In. (25ram) clearance minimum between IRON COIL SUPPORT top of furnace and combustible material & WASHER 2. The entire length of furnace must REQD, supported when furnace...
  • Page 24: Filter Arrangement

    Roll-Out Protection side and bottom of the furnace. (See Figure 28, Figure 31, and Figure 30) Provide a minimum 12-in. x 22-in. (305 x 559 mm) piece of For downflow applications, the filter rack (or field supplied sheet metal for flame roll-out protection in front of burner area accessory air cleaner) must only be connected to the bottom furnaces...
  • Page 25 Table 7 Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c. (Pa) Representative After-Market Filter Media* Factory-Accy Pleated* 14x 25 Filter Washable Fiberglass* (1-in. / 2.5 cm) (1-in, / 2,5 cm) (2-in, / 5 cm) (1-in. / 2.5 cm) (2-in.
  • Page 26 External Filter Cabinet Configurations Downflow Return Air Figure 27 Configurations and Restrictions Figure 30 _Accessory Bottom Filter Rack _fl_ RETURN SIDE RETURN PERMI]q'ED FOR ANY MODEL ® ® ® SIDE RETURN PERMITTED MODEL i s q LY L10F033 Upflow Return Air Configurations Figure 28 and Restrictions SUPPLY...
  • Page 27: Gas Piping

    Systems Design Guidelines reference tables available from Figure 31 _Accessory Side Filter Rack your local distributor. The duct system should be sized to handle the required system design CFM at the design external static pressure. The furnace airflow rates are provided in the Service and Technical Support Manual.
  • Page 28: Fire Or Explosion

    Table 10 Maximum Capacity of Pipe NOMINAL LENGTH OF PIPE - FT (M) INTERNAL IRONPIPE FIRE OR EXPLOSION HAZARD DIA. SIZE IN.(aM) Failure to follow this warning could result in personal (3.0) (6.0) (9.1) (12.1) (15.2) IN.(aM) injury, death, and/or property damage. 1/2 (13) 0,622(158) Gas valve inlet and/or inlet pipe must remain capped...
  • Page 29: Electrical Shock Hazard

    Figure33 /Gas Valves Figure 34 I Gas Entry Redundant Automatic Gas Valve (Two-Stage) Left Side Gas Entry. Gas Pipe Grommet Required For Direct Gas Pipe Grommet Required Vent Applications. For Direct Vent Applications ON,OFF Switch Regulator Seal Cap RegulatorAdjustment 1,2" NPT Inlet Regulator Seal Cap under...
  • Page 30 115-V Wiring Furnace must have a 115-v power supply properly connected FIRE HAZARD and grounded. Failure to follow this warning could result in personal NOTE: Proper polarity must be maintained for 115-v wiring. If injury, death, or property damage. polarity is incorrect, control status indicator light flashes rapidly Do not connect aluminum wire between disconnect and furnace does NOT operate.
  • Page 31: J-Box Installation

    Heating and Cooling Application Two-Stage Wiring Diagram with Single-Stage Thermostat ..FIELD 24-VOLT WIRING ..FIELD 115-, 208/230-, 460-VOLT WIRING FACTORY 24-VOLT WIRING FACTORY 115-VOLT WIRING NOTE @/THERMOSTAT FIVE_ 1 1-STAGE FELD-SUPPLIED FUSED DISCONNECT _ /TERMINALS WIRE__.__ ......BLOWER THREE_WIRE_ DOOR _ REATING-"__ [tT208/230...
  • Page 32: Power Cord Installation

    Figure37 J-Box Bracket Installation Figure 38 I Field-Supplied Furnace Casing Electrical Box on J-BOX MOUNTING SCREWS J-BOX MOUNTING "--.. BRACKET GROUNU NEUTRAb GROUND SCREW ", J-BOX COVER L12F025 A10141 Remove the J-Box cover and mounting bracket from the loose Power Cord Installation in Furnace J-Box parts bag.
  • Page 33: Alternate Power Supplies

    NOTE: Use AWG No. 18 color-coded copper thermostat wire energized when the Induced Draft Relay closes. The for lengths up to 100 ft. (30.5 M). For wire lengths over 100 ft., 24 VAC HUM terminal is energized when the low use AWG No.
  • Page 34 Table 11 Electrical Data (F/G)9MVT TWO-STAGE, VARIABLE SPEED FURNACES OPERATING MINIMUM MAXIMUM MAXIMUM VOLTAGE VOLTS- MAXIMUM WIRE FUSE OR CKT WIRE RANGE* HERTZ- UNIT UNIT SIZE LENGTH PHASE Max* Min* UNIT SIZE AMPS AMPAClTY# AMPST FT (M)$ 115-60-1 0401410 10.3 (11.0) 0601714 115-60-1...
  • Page 35: Select Chart

    Figure 40 _Example of Variable Speed Furnace Control for ECM Blower Motor - (F/G)9MVT COMMUNICATION CONTINUOUS OUTDOOR SETUP CONNECTOR (CF) AIRFLOW TEMP SWITCHES SETUP SWITCHES CONNECTOR MODEL PLUG CONNECTOR SETUP SWITCHES BLOWER OFF- DELAY AIR CONDITIONING (A/C) AIRFLOW SETUP SWITCHES HUMIDIFIER TERMINAL (24A!AC...
  • Page 36 Figure 1Example of Single Stage Furnace Control for ECM Blower Motor - (F/G)9MXE HEAT OFF-DELAY 24-V THERMOSTAT TERMINALS TWINNING AND/OR COMPONENT TEST TERMINAL HUMIDIFIER TERMINAL (24-VAC 0.5 AMP TRANSFORMER 24VAC CONNECTIONS 3-AMP FUSE COMBLUE 24VAC/RED P1 - LOW VOLTAGE MAIN HARNESS CONNECTOR OPERATION...
  • Page 37: Carbon Monoxide Poisoning

    General Uappr_t GVS-65 (Purple) et le ciment-solvant GVS-65 doivent _tre utilise avec les Royal Pipe. Systeme IPEX 636, appr_t If this furnace replaces a furnace that was connected to a vent PVC/CPVC, Purple pour evacuation des gaz de combustion et system or chimney, the vent or vent connectors...
  • Page 38: Venting Systems

    Venting Systems OPTIONAL CONFIGURATION FOR COMBUSTION AIR INLET PIPE CARBON MONOXIDE POISONING HAZARD In applications where there is a risk of excessive mois- Failure to follow the instructions outlined in Locating the ture entering the combustion air inlet pipe, a moisture Vent Termination for each appliance being placed into trap may be added to the inlet pipe to help prevent operation could result in carbon monoxide poisoning or...
  • Page 39 CARBON MONOXIDE POISONING HAZARD Failure to follow the instructions outlined in Locating the Vent Termination for each appliance being placed into operation could result in carbon monoxide poison- ing or death. The instructions included with this furnace DO NOT APPLY to vent systems that are located below the fur- nace.
  • Page 40: Locating The Vent Termination

    Locating the Vent Termination Vent Coupling and Adapter with Figure 43 Gaskets General NOTE: Termination Requirements for the Provinces Alberta and Saskatchewan are located at the end of this section. Combustion-air inlet pipe (Direct Vent/2-Pipe system only) and vent pipe must terminate outside structure, either through...
  • Page 41: Termination Requirements For The Provinces Of Alberta And Saskatchewan

    or tee, certified to ULC S636 from the adjacent property line must be used. (See Figure 46 and Figure 48) The concentric vent kit currently cannot be modified to attach CARBON MONOXIDE POISONING HAZARD an elbow to the vent portion of the rain cap. A tee attached to Failure to follow the instructions outlined in Locating the rain cap could potentially direct the flue gas plume toward...
  • Page 42 Figure 48 IVent Terminations OVERHANG Clearance to overhang per code For single pipe vent applicatioas, install a 45 .."_. downwarddegree elbow pointing SEPARATION 12 In (30&Smm) MIN Ground Level OR Snow Level COMBUSTION AIR LEVEL OR GRADE, (ELBOW PARALLEL WHICHEVER TO WALL) GREATER...
  • Page 43: Moisture Trap

    Figure 50 _Vent Pipe Termination for Non-Direct Vent and Ventilated Combustion Air System Roof Terminatbn (Preferred) (305mm) minimum clearance above highest ant_dpated snow bvel maxim um of 24 _n (61 gem) above roof Abandoned masonry used as raceway (percode) 12 _n m_n (305 mm)from overhang...
  • Page 44 4. If a Tee is used on the termination (Alberta Saskatchewan, when required), record the equivalent length of the Tee used. ADDITIONAL INFORMATION POLYPROPYL- 5. Calculate Total Equivalent Vent Length by adding the ENE VENTING SYSTEMS equivalent lengths of the fittings to the lengths of the Polypropylene venting systems...
  • Page 45 Figure 51 Optional Combustion Air Inlet Moisture Trap ® ® ® ® ® ® TO CODE-APPROVED DRAIN OR CONDENSATE PUMP Representative drawing only, some models may vary in appearance. L12F028 Combustion Air and Vent Piping Insulation Configure the Furnace Guidelines NOTE: Use closed cell, neoprene insulation or equivalent.
  • Page 46 Use a flat blade screwdriver and tap on the knockout Upflow Configurations (CONTINUED) opposite sides, where the knockout meets the casing. Fold the knockout down with duct pliers and work the knockout back and forth until it is removed. Trim any excess metal from the knockout with tin snips.
  • Page 47 Downflow Configurations (CONTINUED) Horizontal Left Configurations (CONTINUED) Rotate vent elbow to required position. ALTERNATE COMBUSTION DOWNFLOW RIGHT - VENT CONFIGURATION Representative drawing only, some models may vary in appearance. Alt3t2 A11328 HORIZONTAL LEFT - LEFT VENT CONFIGURATION Representative drawing only, some models may vary in appearance. ©...
  • Page 48 Installing the Vent Pipe Adapter Horizontal Right Configurations (CONTINUED) Combustion Air Pipe Adapter CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death. To route the vent pipe and combustion air pipe through the furnace, the manufacturer supplied kit must be...
  • Page 49 Install theremaining vent a ndcombustion airpipes asshown Optional Installation of the Vent Pipe below. It is recommended thatallpipes becut,prepared, and NOTE: THIS TECHNIQUE preassembled before p ermanently cementing anyjoint. POLYPROPYLENE VENTING SYSTEMS. 1.Working f romfurnace to outside, cutpipeto required length(s). This option provides a disconnect point for the vent pipe.
  • Page 50: Installing The Vent Termination

    Two-Pipe and Single-Pipe Terminations Figure 57 I Combustion Air Pipe Single and two pipe vent must be installed as shown Point elbow down towards Figure 49 and Figure 50. Maintain the required separation back of furnace distance between vents or pairs of vents as shown Figure 49 and Figure 50 and all clearance shown in Figure 60...
  • Page 51 Determine an appropriate location for termination kit using the as shown in Figure 46 and Figure 48 to avoid recirculation gases. guidelines provided in section "Locating The Vent Termination" in this instruction. Inducer Outlet Restrictor 1. Cut two holes, one for each pipe, of appropriate size for (PSC models only)
  • Page 52 Figure 58 1Crawl Space Vent Termination Ventilated Combustion Air intake pipe Pipe hangar '_" (76 mm) Ventilated Combustion Air 12" (305 mm) intake termination in crawl space CRAWL SPACE L11F016A Figure 59 l Attic Vent Termination Ventilated Combustion Air intake pipe Vent throuhgb__._ roof flashing ATTIC...
  • Page 53 Figure 60 AREAWHERE TERMINAL IS NOT PERMITED VEHTTERMINAL \\\X _/_ AIR SUPPLYINLET 25-24-65-2 NOTE: The following is based upon National codes for gas appliances, and is provided as a reference. Refer to Local codes which may supersede these standards and/or recommendations. Canadian Installations {1) U.S.
  • Page 54 Figure 61 1Other than Direct Vent Clearance - Ventilated Combustion Air Option VENT TERMINAL qXi AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITED 25-24-55-2 NOTE: The following is based upon National codesfor gas appliances, and is provided as a reference. Refer to Local codes which may supersedethese standards and/or recommendations.
  • Page 55 Table 14 (F/G)9MVT, (F/G)9MXT, (F/G)9MXE - MAXIMUM EQUIVALENT VENT LENTH - Feet (Meters) Note: Maximum Equivalent Vent Length (MEVL) does NOT include elbows or terminations Use Table 15 - DEDUCTIONS FROM MEVL to determine allowable vent len,qth for each application. DIRECT VENT (2-PIPE) AND NON-DIRECT VENT (1-PIPE) Altitude Unit Size...
  • Page 56 Example A direct-vent 60,000 BTUH furnace installed at 2100 ft. (640M). Venting system includes FOR EACH PIPE 100 feet (30 M) of vent pipe, 95 feet (28 M) of combustion air inlet pipe, (3) 90 °- long-radius elbows, (2) 450- long-radius elbows, and a factory accessory concentric vent kit.
  • Page 57 Table 16 (F/G)9MVT, (F/G)9MXT, (F/G)9MXE - MAXIMUM EQUIVALENT VENT LENTH - Feet (Meters) Note: Maximum Equivalent Vent Length (MEVL) does NOT include elbows or terminations. Use DEDUCTIONS FROM MEVL - Table 15 to determine allowable vent length for each application. Note: Vent sizing for Canadian installations over 4500 ft.
  • Page 58 Maximum Allowable Exposed Vent Lengths in Unconditioned Space - Single Stage Table 17 Maximum Length of Uninsulated and Insulated Vent Pipe-Ft (M) No Insulation 3/8-in. (9.5 mm) Insulation 1/2-in. (12.7 mm) Insulation Winter (F/G)9MXE Pipe Diameter - in. (mm) Pipe Diameter - in. (mm) Pipe Diameter - in.
  • Page 59 Maximum Allowable Exposed Vent Lengths in Unconditioned Space - Two-Stage Table 18 Maximum Length of Uninsulated and Insulated Vent Pipe-Ft (M) No Insulation (F/G)9MVT 3/8-in. (9.5 mm) 1/2-in. (12.7 mm) & Winter Pipe Diameter - in. (mm) Pipe Diameter - in. (mm) Pipe Diameter - in.

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