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.

Single−Stage, PSC Blower Motor

R9MSB0801716 (A Series Only)

R9MSB (All B Series)

Safety Labeling and Signal Words

DANGER,

WARNING,

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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.

VENTING SYSTEMS

INSTALLING THE VENT TERMINATION

VENTING SYSTEM LENGTH CALCULATIONS

INSTALLER: Affix these instructions on or adjacent to the

furnace.

CONSUMER:

Retain

reference.

440 01 6001 05

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these

instructions

8/15/2017

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future

Table of Contents

Summary of Contents for International comfort products R9MSB0801716

Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS Single−Stage, PSC Blower Motor 35” Tall, High Efficiency Condensing Gas Furnace R9MSB0801716 (A Series Only) R9MSB (All B Series) These instructions must be read and understood completely before attempting installation. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE...
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.
Page 3: Safety Considerations
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 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 FIRE, EXPLOSION, ELECTRICAL SHOCK, AND cautions included in literature and attached to the unit.
Page 4: Introduction
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB CODES AND STANDARDS 11. See Table 2 for required clearances to combustible construction. 12. Maintain a 1−in. (25 mm) clearance from combustible Follow all national and local codes and standards in materials to supply air ductwork for a distance of 36 in. addition to these instructions.
Page 5: Electrostatic Discharge Precautions
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB In the state of Massachusetts: DO NOT move or shuffle your feet, do not touch ungrounded objects, etc.). This product must be installed by a licensed plumber or 4. If you touch ungrounded objects (and recharge your gas fitter.
Page 6: Dimensional Drawing
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB SD5060−4 Rev F SHIP WT. FURNACE SIZE CABINET BOTTOM OUTLET WIDTH AIR INTAKE LB (KG) WIDTH INLET WIDTH 0601716B 17−1/2 (445) 15−7/8 (403) 16 (406) 8−3/4 (222) 144 (65) 0801716A 21 (533) 19−3/8 (492) 19−1/2 (495) 10−1/2 (267) 162 (73) 0801716B...
Page 7 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 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. THE BLOWER IS THE BLOWER IS LOCATED TO THE LEFT LOCATED ABOVE THE...
Page 8: General
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB General WARNING These furnaces are shipped with materials to assist in proper furnace installation. These materials are shipped in the main CARBON MONOXIDE POISONING blower compartment. See Table 1 for loose parts bag contents. COMPONENT DAMAGE HAZARD This furnace must: Failure to follow this warning could result in personal injury or death and unit component damage.
Page 9: Air For Combustion And Ventilation
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB U.S.A. Installations: Current edition of Section 9.3 of WARNING the NFPA 54/ANSI Z223.1, Air for Combustion and Ventilation and applicable provisions of the local building codes. FIRE HAZARD Canada: Current edition of Part 8 of the Failure to follow this warning could result in CAN/CSA−B149.1, Venting Systems and Air Supply personal injury, death and/or property damage.
Page 10 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB of combined input for all gas appliances in the space 2. For fan−assisted appliances such as this furnace: per Figure 6 and Table 3. = 15ft d. TWO OPENINGS OR VERTICAL DUCTS require 1 Volume 1000 Btu/hr sq.
Page 11: Minimum Free Area Required
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors TWO OPENINGS OR TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING VERTICAL DUCTS (1 SQ. IN./2,000 BTUH) (1 SQ. IN./3,000 BTUH) (1 SQ.
Page 12: Condensate Trap
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Condensate Trap − Downflow Orientation. When the furnace is installed in the downflow position, the condensate trap will be initially located at the upper left corner of the collector box, as received from the factory. See the top image in Figure 9.
Page 13 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Vent Pipe Clamp Condensate Trap Vent Elbow Clamp Relief Port Collector Box Plugs Vent Elbow Collector Box Plug Condensate Trap Relief Port Condensate Trap Pressure Switch Outlet Port UPFLOW TRAP CONFIGURATION 1 & 2 Stage Units A11307 Figure 8 −...
Page 14 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 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. port on condensate trap. Remove the screw that secures the trap to the collector box and remove trap.
Page 15 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Remove plug from If alternate vent position collector box. is required, loosen clamp DO NOT DISCARD. on inlet of vent elbow. Remove the screw that secures the trap to the collector box and remove trap. Unconverted Factory Configuration As Viewed in the Horizontal Right Orientation NOTE: Remove knockout in...
Page 16 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Remove the screw that secures the condensate trap to the collector box and remove trap. If alternate vent position is required, loosen clamp on vent elbow inlet. Remove relief tube from relief port on condensate trap.
Page 17 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB CONDENSATE DRAIN An indoor coil condensate drain or humidifier drain can be connected to the external furnace condensate drain provided: CONNECTION a. The drains are not hard piped together, and b. There is an air gap at the point where the two drain CAUTION lines meet or c.
Page 18 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB See Figure 16. DO NOT DISCARD THE FORMED NOTICE GROMMET OR THE RUBBER ELBOW. Both of these pieces will be used. The field-supplied, accessory horizontal drain trap Assemble and route the drain line to the opposite side of the grommet is ONLY REQUIRED FOR DIRECT VENT furnace as detailed below: APPLICATIONS.
Page 19 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Example of Field Drain Attachment Figure 13 Example of Field Drain Attachment Figure 12 (NOT ALLOWED) Evaporator Coil + + + + = Positive pressure Air gap here < + = Pressure lower than areas with + Open standpipe −...
Page 20 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Example of Field Drain Attachment cont. INSTALL CLAMPS ON DRAIN ELBOW ATTACH DRAIN ELBOW TO CONDENSATE DRAIN TRAP Evaporator Coil Ä Ä Ä Ä Ä Ä Ä Ä Ä PULL DRAIN STUB Ä Ä Ä Ä Ä Ä Ä Ä Ä THROUGH CASING Open standpipe Ä...
Page 21: Installation
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Supply Air Connections NOTE: Trap grommet is required only for direct-vent For a furnace not equipped with a cooling coil, the outlet duct applications. shall be provided with a removable access panel. This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for possible openings using light assistance or a probe can be inserted for sampling the air stream.
Page 22 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 4. Adjust outside nut to provide desired height, and tighten Bottom Return Air Inlet inside nut to secure arrangement. These furnaces are shipped with bottom closure panel installed 5. Reinstall bottom closure panel if removed. in bottom return−air opening.
Page 23: Filter And Return Duct Sizing
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB such a size that the heat exchanger can be viewed for possible A filter rack or any field supplied accessory air cleaner can also openings using light assistance or a probe can be inserted for be installed in the common return duct prior to entering the sampling the air stream.
Page 24 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c. (Pa) Table 6 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. / 5 cm) (1-in.
Page 25 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB FURNACE FILTER FRAME DOOR TABS FILTER ⅜” 2 ⅜” ½” 1 ¼” (1 cm) (1.3 cm) (6 cm) (3 cm) TABS (TYP.) 25 ⅛” ¾” (64 cm) 4” (2 cm) (3 cm) 16 ⅛” 23 ⅛” (41 cm) 17 ⅛”...
Page 26 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Table 8 – Opening Dimensions − In. (mm) FURNACE PLENUM OPENING FLOOR OPENING CASING APPLICATION WIDTH IN. (mm) Upflow Applications on Combustible or Noncombustible 12−11/16 21−5/8 13−5/16 22−1/4 Flooring (subbase not required) (322) (549) (338) (565) Downflow Applications on Noncombustible Flooring 12−9/16...
Page 27 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 5/ 16  (8mm) (8mm) 5/ 16   (44mm)  (44mm) (8mm)  SCREWS (4) (8mm) 5/ 16  BOTTOM (44mm) 3/ 4 PLATE  3/ 4  (44mm) Representative drawing only, some models may vary in appearance. Lay furnace on the back or side A89014 Remove the four (4) screws that secure the bottom...
Page 28 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB ANY COMBINATION OF 1, 2, OR 3 PERMITTED. A11037 A11036 Figure 28 − Downflow Return Air Configurations Figure 27 − Upflow Return Air Configurations and and Restrictions Restrictions HORIZONTAL TOP RETURN NOT PERMITTED FOR ANY MODEL HORIZONTAL TOP RETURN NOT PERMITTED FOR...
Page 29 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB COMBUSTION - AIR PIPE (SEE VENTING SECTION) 30 IN. (762 mm) MIN. WORK AREA 2-IN. (51 mm) ROLLOUT PROTECTION REQUIRED Install 12” x 22” (305x559 mm) sheet metal in front of burner compartment area. The sheet metal MUST extend underneath the furnace casing by 1-in. (25 mm) with the door removed.
Page 30: Air Ducts
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB AIR DUCTS GAS PIPING NOTICE WARNING Many states, provinces and localities are considering FIRE OR EXPLOSION HAZARD or have implemented standards and/or restrictions on Failure to follow this warning could result in duct sizing practices, ductwork leakage, and/or duct- personal injury, death, and/or property damage.
Page 31 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB A 1/8−in. (3 mm) NPT plugged tapping, accessible for test WARNING gauge connection, MUST be installed immediately upstream of gas supply connection to furnace and downstream of manual FIRE OR EXPLOSION HAZARD equipment shutoff valve. A failure to follow this warning could result in Piping should be pressure and leak tested in accordance with personal injury, death, and/or property damage.
Page 32: Electrical Connections
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 1 1/2 inch for Gas WARNING 7/8 inch for 115 VAC Electric ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury, death, or property damage. The cabinet MUST have an uninterrupted or unbroken ground according to current edition of the NEC NFPA 70 or local codes to minimize personal...
Page 33: J−Box Installation
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB J−Box Installation 11. Install the green ground screw to the J−Box bracket and attach both ground wires to the green ground screw. 12. Connect any code required external disconnect(s) to field WARNING power wiring. 13. Connect field power and neutral leads to furnace power FIRE OR ELECTRICAL SHOCK HAZARD leads inside the external electrical box as shown in Failure to follow this warning could result in personal...
Page 34 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB WARNING board marked EAC−1 and EAC−2. The terminals are rated for 115VAC, 1.0 amps maximum and are energized during blower motor operation. 2. Humidifier (HUM) FIRE, EXPLOSION, ELECTRICAL SHOCK, AND CARBON MONOXIDE POISONING HAZARD The HUM terminal is a 24 VAC output, energized when the LPS closes during a call for heat.
Page 35 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB OPTIONAL J−BOX LOCATIONS GROUND NEUTRAL LINE VOLTAGE Representative drawing only, some models may vary in appearance. L12F024 J−BOX MOUNTING SCREWS BLUNT−TIP ELECTRIC DISCONNECT SWITCH J−BOX COPPER MOUNTING WIRE ONLY BRACKET ALUMINUM WIRE A11146 Figure 37 − Field−Supplied External Electrical Box on Furnace Casing GROUND SCREW...
Page 36 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB FIELD 24-V WIRING FIELD 115-, 208/230-, 460-V WIRING FACTORY 24-V WIRING FACTORY 115-V WIRING NOTE 2 THERMOSTAT FIVE WIRE FIELD-SUPPLIED TERMINALS DISCONNECT THREE-WIRE HEATING-ONLY 208/230- OR BLOWER DOOR SWITCH 460-V THREE PHASE 208/230-V SINGLE PHASE AUXILIARY 115-V FIELD- J-BOX...
Page 37: Venting
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB VENTING Canadian standard CAN/CSA B149 is dependent upon full compliance with all installation instructions. Under this NOTE: Planning for the venting system should be done in standard, it is recommended that the vent system be checked conjunction with planning for the ductwork, drainage, and once a year by qualified service personnel.
Page 38: Venting Systems
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Care must be taken to prevent the exhaust gases from one WARNING appliance from contaminating the combustion air of other gas appliances. CARBON MONOXIDE POISONING HAZARD Do not take combustion air from inside the chimney when using ventilated combustion air or single−pipe vent option.
Page 39 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Table 11 – Vent Termination for Direct Vent (2−pipe) are discharged to outdoor atmosphere. Air for combustion Systems must be supplied as described in the Air For Combustion and Ventilation Section. Do not use an abandoned chimney to Diam.
Page 40 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Table 12 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (U.S.A. Installations) MATERIALS 1. All pipe, fittings, primers*, and solvents* must conform to American National Standards Institute (ANSI) standards and American Society for Testing and Materials (ASTM) standards or ULC S636 where required by code.
Page 41 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB When determining appropriate location for termination, consider Inside Corner Terminations the following guidelines: Inside corner vent terminations are permitted provided that: 1. Comply with all clearance requirements stated in 1. Only two exterior walls come together to form an angle of Figure 52 or Figure 53 per application.
Page 42 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB For clearance distances when vent termination is located more than 6 ft. (2 M) away from an inside corner, refer to the appropriate Direct Vent or Non−Direct Vent Clearance Table. Clearance description when termination is at least 3 ft. (1 M) away and not more than 6 ft. (2 M) away from an inside corner.
Page 43 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB to. Refer to the appropriate Vent Termination section above for The concentric vent kit currently cannot be modified to attach locating the vent termination 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 If the unobstructed distance from the foundation to the property the intake air stream and contaminate the incoming combustion...
Page 44 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 7. Select a diameter of vent pipe from Table 14 and note NOTICE the Maximum Equivalent Vent Length (MEVL) shown for that application for that specific furnace input size. ADDITIONAL INFORMATION FOR POLYPROPYL- Compare the Total Equivalent Vent Length (TEVL) to the ENE VENTING SYSTEMS MEVL: a.
Page 45 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Configure the Furnace Install the Vent and Combustion Air Pipe With the furnace installed in the required position, remove the WARNING desired knockouts from the casing. It will be necessary to remove one knockout for the vent pipe and the other knockout for the combustion air connection.
Page 46 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 3. Pilot drill the screw holes for the adapter in the casing 8. Torque clamp on vent coupling 15 lb−in. and attach the vent pipe adapter to the furnace with 9. Insert the combustion air pipe into the adapter. sheet metal screws 10.
Page 47: Installing The Vent Termination
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 2. Slide the plastic vent pipe adapter over the length of the WARNING vent pipe down to the furnace casing. Mark the pipe where it is flush with the outlet of the adapter. CARBON MONOXIDE POISONING HAZARD 3.
Page 48 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB (Direct Vent / Two-Pipe System ONLY) 3. Slide assembled kit with rain shield REMOVED through hole. When two or more furnaces are vented near each other, two NOTE: Do not allow insulation or other materials to accumulate vent terminations may be installed as shown in Figure 54, but inside of pipe assembly when installing it through hole.
Page 49 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Table 13 – Maximum Allowable Exposed Vent Lengths Insulation Table − Ft. / M Maximum Allowable Exposed Vent Length in Unconditioned Space (Feet) Unit Size 60,000 BTUH Uninsulated 3/8in. Insulation 1/2in. Insulation Pipe Dia. 1 ½ 2 ½...
Page 50 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Table 14 – Maximum Equivalent Vent Length − Ft. (M) Single Stage 92% - Feet/inches Unit Size 60,000 80,000 100,000 120,000 Pipe Dia. (in) 1 ½ 2 ½ 1 ½ 2 ½ 2 ½ 2 ½ 02000 20013000 30014000...
Page 51: Venting System Length Calculations
INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Venting System Length Calculations The Total Equivalent Vent Length for EACH combustion air or vent pipe equals the length of the venting system, plus the equivalent length of elbows used in the venting system from Table 15. Standard vent terminations or factory accessory concentric vent terminations count for zero deduction.
Page 52 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Attach gaskets to vent pipe and Vent Coupling and Adapter combustion air adapters. A13074 Figure 43 − Vent Coupling and Adapter with Gaskets TABS ON THE INDUCER OUTLET RESTRICTOR SNAP INTO THE SLOTS AT THE OUTLET OF THE INDUCER FOR USAGE: SEE MAXIMUM EQUIVALENT VENT LENGTH TABLE A170006...
Page 53 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Rotate vent elbow to required position. Any other unused knockout may be used for combustion air connection. Rotate vent elbow to required position. & UPFLOW LEFT CONFIGURATION DOWNFLOW LEFT CONFIGURATION A11309A A11311A Rotate vent elbow to required position.
Page 54 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB ALTERNATE COMBUSTION AIR CONNECTIONS HORIZONTAL LEFT−VERTICAL VENT CONFIGURATION HORIZONTAL RIGHT−VERTICAL VENT CONFIGURATION A11327A A11337 Alternate combustion air connection. Rotate vent elbow to required position. Vent Pipe Requires Internal Vent Kit See Product Data for Current Kit Number HORIZONTAL RIGHT−LEFT VENT CONFIGURATION HORIZONAL LEFT−LEFT VENT CONFIGURATION A11328A...
Page 55 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB NOTES FOR VENTING OPTIONS 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. 4.
Page 56 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 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 U.S.
Page 57 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB 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 U.S.
Page 58 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Roof Termination (Preferred) Note: 36−in. separation between pairs of inlets only required for direct−vent systems Note: Vertical separation between At least 36 in. “A” denotes 0 To 2 in. (51mm) combustion air and vent (914mm) Between the first 2 vents Third 8 ¾...
Page 59 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB OPTIONAL TERMINATION BRACKET FOR 2-PIPE TERMINATIONS OPTIONAL 12 IN. (305 MM) MIN. BRACKET COUPLING SEPARATION BETWEEN 12 IN. (305 MM) MIN. SEPARATION BOTTOM OF COMBUSTION BETWEEN BOTTOM OF AIR AND BOTTOM OF VENT. COMBUSTION AIR AND BOTTOM OF VENT.
Page 60 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Ventilated Combustion Air intake pipe Pipe hangar 3” (76 mm) 12” (305 mm) Ventilated Combustion Air intake termination in crawl space CRAWL SPACE highest level of insulation ATTIC A10497 Figure 57 − Vent Terminations for Ventilated Combustion Air Specifications subject to change without notice.
Page 61 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB TO CODE−APPROVED DRAIN OR CONDENSATE PUMP Recommend “T” fitting with 4−inch minimum height standpipe (A) of same diameter or larger extending upward. Dry Well Dry Well (water tight Dry Well (water tight and removable) and removable) (water tight and removable) Representative drawing only, some models may vary in appearance.
Page 62 INSTALLATION INSTRUCTIONS Gas Furnace: R9MSB Copyright 2017 International Comfort Products Lewisburg, TN 37091 USA Specifications subject to change without notice. 440 01 6001 05...

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