Table of Contents
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INSTALLATION INSTRUCTIONS
Variable Speed Motor, Two−Stage ECM Motor and Single−Stage
35" Tall, High Efficiency Condensing Gas Furnace
These instructions must be read and understood completely before attempting installation.
DANGER, WARNING, CAUTION, and NOTE
The
signal
words
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.
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
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Portions of the text and tables are reprinted from NFPA 54 /ANSI Z223.1−2012©, 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 in U.S.A.
(F/G)9MVT, (F/G)9MXT, (F/G)9MXE
Safety Labeling and Signal Words
DANGER,
WARNING,
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Signal Words in Manuals
The signal word WARNING is used throughout
this manual in the following manner:
WARNING
!
The signal word CAUTION is used throughout
this manual in the following manner:
CAUTION
!
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
Safety−alert symbol
When you see this symbol on the unit and in
instructions or manuals, be alert to the
potential for personal injury.
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INSTALLER: Affix these instructions on or adjacent to the
36
furnace.
CONSUMER:
Retain
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reference.
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Use of the AHRI Certified TM Mark indicates a
manufacturer's participation in the program.
For verification of certification for individual
products, go to www.ahridirectory.org .
these
instructions
440 01 4001 05
April 2013
for
future
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Table of Contents
Related Manuals for International comfort products F9MVT
Summary of Contents for International comfort products F9MVT
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS Variable Speed Motor, Two−Stage ECM Motor and Single−Stage 35” Tall, High Efficiency Condensing Gas Furnace (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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... - Page 2 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: (a) 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 above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied: INSTALLATION OF CARBON MONOXIDE DETECTORS.
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Page 3: Safety Considerations
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Safety Considerations changing residential construction practices. We require these instructions as a minimum for a safe installation. Follow all safety codes. Wear safety glasses, protective WARNING 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: Introduction
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE accessory gas conversion kit is required to convert For accessory installation details, refer to the applicable furnace for use with propane gas. instruction literature. See Table 1 for required clearances to combustible NOTE: Remove all shipping materials, parts assemblies and construction. -
Page 5: Electrostatic Discharge (Esd)
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Combustion and Ventilation Air Disconnect all power to the furnace. Multiple disconnects may be required. DO NOT TOUCH THE US: Section 9.3 of the NFPA54/ANSI Z223.1−2012, CONTROL OR ANY WIRE CONNECTED TO THE CONTROL PRIOR TO DISCHARGING YOUR BODY’S Air for Combustion and Ventilation ELECTROSTATIC CHARGE TO GROUND. -
Page 6: Dimensions
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 2 Dimensions SD5060−4 Rev F (F/G)9MVT SHIP WT. BOTTOM FURNACE SIZE CABINET WIDTH OUTLET WIDTH AIR INTAKE LB (KG) INLET WIDTH 0401410 14−3/16 (361) 12−1/2 (319) 12−9/16 (322) 7−1/8 (181) 121 (54) 0601714 17−1/2 (445) 15−7/8 (403) - Page 7 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Location • be located close to the chimney or vent and attached to an air distribution system. Refer to Air Ducts section. • be provided ample space for servicing and cleaning. CAUTION Always comply with minimum fire protection clearances shown in Table 1 or on the furnace clearance to combustible construction label.
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Page 8: Location Relative To Cooling Equipment
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 3 Multipoise Orientations 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. -
Page 9: Air For Combustion And Ventilation
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Air for Combustion and WARNING Ventilation CARBON MONOXIDE POISONING HAZARD Introduction Failure to follow this warning could result in personal Direct Vent (2−pipe) Applications injury or death. The operation of exhaust fans, kitchen ventilation fans, When the furnace is installed as a direct vent (2-pipe) furnace, clothes dryers, attic exhaust fans or fireplaces could no special provisions for air for combustion are required. - Page 10 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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 −...
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Page 11: Combination Of Indoor And Outdoor Air
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Combination of Indoor and Outdoor Air Air for Combustion, Ventilation, Figure 7 and Dilution from Indoors Indoor openings shall comply with the Indoor Combustion Air Method below and, Outdoor openings shall be located as required in the Outdoor Combustion Air Method mentioned previously and, Outdoor openings shall be sized as follows:... -
Page 12: Condensate Trap
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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) Space Volume Ft 1,050 1,400 1,750... - Page 13 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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 bag. Remove relief tube from relief Remove tube from relief port.
- Page 14 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Condensate Trap − Horizontal NOTICE 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 the casing collector box, as received from the factory.
- Page 15 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Horizontal Right Trap 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 Attach condensate orientation. Tighten clamp on trap with screw to inlet to vent elbow 15 lb.−in.
- Page 16 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Horizontal Left Trap Configuration (continued) NOTE: Remove knockout in casing before re−installing the Install two plugs previously condensate trap. removed in open ports on Rotate elbow to collector box. desired position and torque clamp Connect relief tube to port on inlet 15 lb.−in.
- Page 17 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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 box (downflow). (NOTE: When the inducer on the outside of the furnace casing.
- Page 18 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 3. Remove the knock−out for the condensate trap in the Figure 14 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.
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Page 19: Installation
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 16 Formed Rubber Drain Grommet Figure 18 Furnace Pitch Requirements INSTALL CLAMPS ON DRAIN ELBOW LEVEL 0-IN. (0 MM) TO ATTACH DRAIN ELBOW TO CONDENSATE 1/2-IN. (13 MM) MAX DRAIN TRAP PULL DRAIN STUB MIN 1/4-IN. -
Page 20: Downflow Installation
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Install another nut on other side of furnace base. (Install Figure 19 Removing Bottom Closure Panel flat washer if desired.) Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement. Reinstall bottom closure panel if removed. -
Page 21: Horizontal Installation
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE WARNING 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, AND 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 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Table 5 Opening Dimensions − in. (mm) FURNACE PLENUM OPENING FLOOR OPENING CASING WIDTH APPLICATION IN. (mm) Upflow Applications on Combustible or Noncombustible Flooring 12−11/16 21−5/8 13−5/16 22−1/4 (subbase not required) (322) (549) (338) (565) Downflow Applications on Noncombustible Flooring...
- Page 23 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 25 Suspended Furnace Installation COMBUSTION − AIR PIPE (SEE VENTING SECTION) 2−in. (51 mm) A11155 NOTE: Local codes may require a drain pan and condensate trap when a condensing furnace is installed over a finished ceiling.
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Page 24: Filter Arrangement
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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 for furnaces closer than 12−in. - Page 25 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Table 7 Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c. (Pa) Representative After-Market Filter Media* Factory-Accy Fiberglass* Pleated* 14 x 25 Filter Washable (1-in. / 2.5 cm) (1-in. / 2.5 cm) (2-in.
- Page 26 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE External Filter Cabinet Configurations Downflow Return Air Figure 27 Configurations and Restrictions Figure 30 Accessory Bottom Filter Rack L10F033 Upflow Return Air Configurations Figure 28 and Restrictions L10F031 22−5/16 (566.4) 28−7/16 (722.2) L10F032 Horizontal Return Air Figure 29 Configurations and Restrictions...
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Page 27: Air Ducts
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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. - Page 28 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE WARNING Table 10 Maximum Capacity of Pipe NOMINAL LENGTH OF PIPE − FT (M) INTERNAL FIRE OR EXPLOSION HAZARD IRON PIPE DIA. SIZE Failure to follow this warning could result in personal IN. (MM) (3.0) (6.0) (9.1)
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Page 29: Electrical Connections
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 33 Gas Valves Figure 34 Gas Entry Redundant Automatic Gas Valve (Two−Stage) Left Side Gas Entry. Gas Pipe Gas Pipe Grommet Required Grommet Required For Direct For Direct Vent Applications Vent Applications. ON/OFF Switch Regulator Seal Cap Regulator Adjustment... - Page 30 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE WARNING 115−V Wiring Furnace must have a 115-v power supply properly connected and grounded. FIRE HAZARD NOTE: Proper polarity must be maintained for 115-v wiring. If Failure to follow this warning could result in personal polarity is incorrect, control status indicator light flashes rapidly injury, death, or property damage.
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Page 31: J−Box Installation
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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 2 1 STAGE THERMOSTAT FIVE FIELD SUPPLIED... - Page 32 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 37 J−Box Bracket Installation Field−Supplied Electrical Box on Figure 38 Furnace Casing J−BOX MOUNTING SCREWS J−BOX MOUNTING BRACKET GROUND NEUTRAL LINE VOLTAGE 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.
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Page 33: Alternate Power Supplies
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Table 11 Electrical Data (F/G)9MVT TWO−STAGE, VARIABLE SPEED FURNACES OPERATING MINIMUM MAXIMUM MAXIMUM VOLTAGE VOLTS− MAXIMUM WIRE WIRE FUSE OR CKT RANGE* HERTZ− UNIT UNIT SIZE LENGTH Max* Min* UNIT SIZE PHASE AMPS AMPACITY# FT (M)} AMPS{...
- Page 35 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 40 Example of Variable Speed Furnace Control for ECM Blower Motor − (F/G)9MVT COMMUNICATION CONTINUOUS FAN OUTDOOR SW4 SETUP CONNECTOR F) AIRFLOW IR TEMP SWITCHES SETUP SWITCHES CONNECTOR MODEL PLUG CONNECTOR SW1 SETUP SWITCHES AND BLOWER OFF DELAY...
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Page 36: Venting
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 42 Example 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 24VAC HUMIDIFIER TERMINAL (24 VAC 0.5 AMP MAX) TRANSFORMER 24VAC CONNECTIONS 3 AMP FUSE... - Page 37 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE General L’apprêt GVS-65 (Purple) et le ciment-solvant GVS-65 doivent être utilisé avec les Royal Pipe. Système IPEX 636, apprêt If this furnace replaces a furnace that was connected to a vent PVC/CPVC, Purple pour évacuation des gaz de combustion et system or chimney, the vent or vent connectors of other système IPEX 636(1)t, ciment PVC pour évacuation des gaz remaining appliances may need to be re−sized.
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Page 38: Venting Systems
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Venting Systems NOTICE WARNING 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... - Page 39 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE WARNING 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.
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Page 40: Direct Vent / 2−Pipe System
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Locating the Vent Termination Vent Coupling and Adapter with Figure 43 Gaskets General NOTE: Termination Requirements for the Provinces of 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 sidewall or roof. -
Page 41: Ventilated Combustion Air
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE WARNING The concentric vent kit currently cannot be modified to attach an elbow to the vent portion of the rain cap. A tee attached to the rain cap could potentially direct the flue gas plume toward CARBON MONOXIDE POISONING HAZARD the intake air stream and contaminate the incoming combustion air for the furnace. - Page 42 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 48 Vent Terminations OVERHANG EXHAUST CLEARANCE TO OVERHANG PER CODE 12 IN. (305 MM) MIN. GROUND LEVEL OR ANTICIPATED SNOW LEVEL OPTIONAL BRACKET COUPLING 12 IN. (305 MM) MIN. SEPARATION BETWEEN BOTTOM OF COMBUSTION AIR AND BOTTOM OF VENT.
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Page 43: Size The Vent And Combustion Air Pipes
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 50 Vent Pipe Termination for Non−Direct Vent and Ventilated Combustion Air System Roof Termination (Preferred) Vent Maintain 12 in (305mm) minimum clearance above highest anticipated snow level maximum of 24 in. (610mm) above roof Abandoned masonry used as raceway (per code) - Page 44 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Trap Kit, refer to those instructions for proper drain 2. Count the number of elbows for each pipe. connections. 3. For each pipe, multiply the number of elbows by the equivalent length for the type of elbow used. Record the The tee may also be connected to the intake air pipe on the equivalent length of all the elbows for each pipe.
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Page 45: Configure The Furnace
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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 WARNING Guidelines NOTE: Use closed cell, neoprene insulation or equivalent. - Page 46 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 1. Loosen the clamp on the inlet of the vent elbow attached Figure 53 Upflow Configurations to the inducer. 2. Rotate the vent elbow to the required position. There are rounded notches in the vent elbow to align it with the inducer for each orientation.
- Page 47 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 54 Downflow Configurations Figure 55 Horizontal Left Configurations HORIZONTAL LEFT − VERTICAL VENT CONFIGURATION DOWNFLOW LEFT − VENT CONFIGURATION Representative drawing only, some models may vary in appearance. Representative drawing only, some models may vary in appearance. A11311 DOWNFLOW RIGHT −...
- Page 48 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE NOTES: Figure 56 Horizontal Right Configurations 1. Attach vent pipe adapter with gasket to furnace casing. 2. Align notches in rubber coupling over standoffs on adapter. Slide clamps over the coupling. 3. Slide vent pipe through adapter and coupling into vent elbow.
- Page 49 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 6. Tighten the clamp around the outlet of the vent elbow. ventilated combustion air terminations, refer to Figure 58 and Figure 59. Torque the clamp to 15 lb−in. 19. Use appropriate methods to seal openings where NOTICE combustion air pipe and vent pipe pass through roof or sidewall.
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Page 50: Installing The Vent Termination
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE WARNING Cut one 4−in. (102 mm) diameter hole for 2−in. (50 mm ND) kit, or one 5−in. (127 mm) diameter hole for 3−in. (80 mm ND) kit in the desired location. CARBON MONOXIDE POISONING HAZARD Loosely assemble concentric vent/combustion air termination Failure to follow this warning could result in personal components together using instructions in kit. - Page 51 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Two-Pipe and Single-Pipe Vent Termination (Direct Vent / Two-Pipe System ONLY) NOTE: Follow the instructions of the vent terminal When two or more furnaces are vented near each other, two vent terminations may be installed as shown in Figure 46 and manufacturer.
- Page 52 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 58 Crawl Space Vent Termination Ventilated Combustion Air intake pipe Pipe hangar 3” (76 mm) 12” (305 mm) Ventilated Combustion Air intake termination in crawl space CRAWL SPACE L11F016A Figure 59 Attic Vent Termination Ventilated Combustion Air intake pipe Vent through...
- Page 53 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 60 Direct Vent Termination Clearance 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. (1 ) (2 ) Canadian Installations...
- Page 54 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Figure 61 Other than Direct Vent Clearance − Ventilated Combustion Air Option 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. (1 ) (2 ) Canadian Installations...
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Page 55: Maximum Equivalent Vent Lenth
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Table 14 (F/G)9MVT, (F/G)9MXT, (F/G)9MXE − MAXIMUM EQUIVALENT VENT LENGTH - Feet (Meters) Note: Maximum Equivalent Vent Length (MEVL) does NOT include elbows or terminations Use Table 15 − DEDUCTIONS FROM MEVL to determine allowable vent length for each application. DIRECT VENT (2-PIPE) AND NON-DIRECT VENT (1-PIPE) Altitude Unit Size... - Page 56 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Example 1 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) 90º long-radius elbows, (2) 45º long-radius elbows, and a factory accessory concentric vent kit.
- Page 57 INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE Table 16 (F/G)9MVT, (F/G)9MXT, (F/G)9MXE − MAXIMUM EQUIVALENT VENT LENGTH - 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.
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Page 58: Maximum Allowable Exposed Vent Lengths
INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE 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 (F/G)9MXE Winter Pipe Diameter −... - Page 59 28.7 21.6 34.7 26.8 N/A 15.0 15.0 69.0 48.0 15.0 85.0 62.0 -40 (-40) 21.0 14.6 25.9 18.9 International Comfort Products S PO Box 128 S Lewisburg, TN 37091 USA 440 01 4001 05 Specifications subject to change without notice.