INSTALLATION INSTRUCTIONS Single--Stage, 35--in. (889 mm) Tall High Efficiency Condensing Gas Furnace N95ESN (Series A) NOTE: Read the entire instruction manual before starting the installation. SECTIONS TABLES SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 3 Loose Parts Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Minimum Clearances to Combustible Materials . . . . . . . . . . . . . 4 Minimum Free Area Required . . . . . . . . . . . . . . . .
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.
SAFETY CONSIDERATIONS WARNING ! FIRE, EXPLOSION, ELECTRICAL SHOCK, AND CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in dangerous operation, personal injury, death, or property damage. Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poisoning, explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage.
9. The furnace may be used for construction heat provided that the furnace installation and operation complies with the first CAUTION in the LOCATION section of these instructions. 10. These Multipoise Gas--Fired Furnaces are CSA design--certified for use with natural and propane gases (see furnace rating plate) and for installation in alcoves, attics, basements, closets, utility rooms, crawlspaces, and garages. The furnace is factory--shipped for use with natural gas. A CSA (A.G.A. and C.G.A.
CODES AND STANDARDS Follow all national and local codes and standards in addition to these instructions. The installation must comply with regulations of the serving gas supplier, local building, heating, plumbing, and other codes. In absence of local codes, the installation must comply with the national codes listed below and all authorities having jurisdiction.
A180203 FURNACE SIZE 0261410 0401410 0401712 0601412 0601714 0801716 0802120 1002120 1202420 1402422 A CABINET WIDTH 14--- 3/16 (361) 14--- 3/16 (361) 17--- 1/2 (445) 14--- 3/16 (361) 17--- 1/2 (445) 17--- 1/2 (445) 21 (533) 21 (533) 24--- 1/2 (622) 24--- 1/2 (622) B OUTLET WIDTH 12--- 1/2 (319) 12--- 1/2 (319) 15--- 7/8 (403) 12--- 1/2 (319) 15--- 7/8 (403) 15--- 7/8 (403) 19--- 3/8 (492) 19--- 3/8 (492) 22--- 7/8 (581) 22--- 7/8 (581) C BOTTOM INLET WIDTH 12--- 9/16 (322) 12--- 9/16 (322) 16 (406) 12--
LOCATION ! ! CAUTION WARNING CARBON MONOXIDE POISONING / COMPONENT DAMAGE HAZARD PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD Failure to follow this warning could result in personal injury or death and unit component damage. Improper use or installation of this furnace may result in premature furnace component failure.
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 LOCATED TO THE LEFT OF THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED TO THE RIGHT. THE BLOWER IS LOCATED ABOVE THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED DOWNWARD A12181 Fig.
AIR FOR COMBUSTION AND VENTILATION ! WARNING Introduction CARBON MONOXIDE POISONING HAZARD 2-- pipe Applications Failure to follow this warning could result in personal injury or death. When the furnace is installed as a 2-pipe furnace, no special provisions for air for combustion are required. However, other gas appliances installed in the space with the furnace may require outside air for combustion. Follow the guidelines below to insure that other gas appliances have sufficient air for combustion.
Indoor Combustion AirE NFPA & AGA Standard and Known-- Air-- Infiltration Rate Methods Indoor air is permitted for combustion, ventilation, and dilution, if the Standard or Known--Air--Infiltration Method is used. WARNING ! CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death. Many homes require air to be supplied from outdoors for furnace combustion, ventilation, and dilution of flue gases.
Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors TWO HORIZONTAL DUCTS (1 SQ. IN./2,000 BTUH) (1,100 SQ. MM/KW) FURNACE INPUT (BTUH) Free Area of Opening and Duct Sq. In (Sq. mm) 13 (8388) 20 (12904) 30 (19355) 40 (25807) 50 (32258) 60 (38709) 70 (45161) 26,000* 40,000* 60,000 80,000 100,000 120,000 140,000* SINGLE DUCT OR OPENING (1 SQ. IN./3,000 BTUH) (734 SQ. MM/KW) Free Area of Opening and Duct Sq. In (Sq.
CONDENSATE TRAP NOTICE Condensate Trap -- Upflow Orientation When the furnace is installed in the upflow position, it is not necessary to relocate the condensate trap or associated tubing. Refer to Fig. 9 for upflow condensate trap information. Refer to Condensate Drain section for information how to install the condensate drain. The field--supplied, accessory horizontal drain trap grommet is ONLY REQUIRED FOR DIRECT VENT APPLICATIONS.
A11587 Fig. 10 -- Downflow Trap Configuration (Appearance may vary) A11574 Fig. 12 -- Horizontal Left Configuration (Appearance may vary) CONDENSATE DRAIN CONNECTION ! CAUTION FROZEN AND BURST WATER PIPE HAZARD Failure to protect against the risk of freezing may result in property damage. Special precautions MUST be made if installing furnace in an area which may drop below freezing. This can cause improper operation or damage to equipment.
DO NOT trap the drain line in any other location than at the condensate drain trap supplied with the furnace. If possible, DO NOT route the drain line where it may freeze. The drain line must terminate at an inside drain to prevent freezing of the condensate and possible property damage. Special precautions MUST be made if installing furnace in an area which may drop below 32_ F (0_ C). This can cause improper operation or damage to the equipment.
9. Pull the grommet through the casing from the outside until it is seated in the knockout. 10. Align the Z-pipe with the long end of the grommet inside the furnace and insert slightly. The angled end of the tube at the other side of the casing should be facing the front of the furnace. 11. Slide a spring clamp over the end of the remaining rubber drain elbow. 12. Attach the drain elbow to the angled end of Z-pipe and the drain trap outlet stub.
4. Install the drain trap grommet in the casing if required for direct--vent applications. If necessary, remove the trap, install the grommet and re-install the trap. 5. Remove the pre-formed rubber drain elbow, and two spring clamps from the loose parts bag. 6. Connect the full or modified elbow and/or grommet to the outlet of the condensate trap with one spring clamp. Avoid misalignment of the drain pipe which may cause kinks in the elbow or grommet. 7.
ÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄ + ++ ÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄ Evaporator Coil &RLO RU KXPLGLILHU GUDLQ ZKHQ XVHG DIRECTION OF AIRFLOW + Air gap here Open standpipe LQ KLJK PLQLPXP for coil or humidifier drain TEE (1/2” CPVC to 3/4” PVC adapter from loose parts bag.) 3/4” PVC 3/4 + Condensing Furnace + + + 3/4” PVC 3/4 + + Open standpipe LQ KLJK PLQLPXP Air gap required when another drain is connected to furnace drain.
UPFLOW PERFORATED DISCHARGE DUCT FLANGE DOWNFLOW HORIZONTAL 90° 90° YES YES YES 120° MIN YES 120° MIN YES 120° MIN NO NO YES NO A10493 Return Air Connections ! FIRE HAZARD WARNING Fig. 19 -- Duct Flanges 3. Install another nut on other side of furnace base. (Install flat washer if desired.) 4. Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement. 5. Reinstall bottom closure panel if removed.
3. Construct plenum to dimensions specified in Table 8 and Fig. 29. 4. Install special base coil assembly or coil box as shown in in Fig. 29. NOTE: It is recommended that the perforated supply--air duct flanges be completely removed from furnace when installing the furnace on a factory--supplied cased coil or coil box. To remove the supply--air duct flange, use wide duct pliers or hand seamers to bend flange back and forth until it breaks off. Be careful of sharp edges. See Fig. 19.
HORIZONTAL TOP RETURN NOT PERMITTED FOR ANY MODEL A11038 ANY COMBINATION OF 1, 2, OR 3 PERMITTED. A11036 Fig. 22 -- Upflow Return Air Configurations and Restrictions Fig. 24 -- Horizontal Return Air Configurations and Restrictions Supply Air Connections For a furnace not equipped with a cooling coil, the outlet duct shall be provided with a removable access panel.
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. The bottom closure panel may be used for flame roll-out protection when bottom of furnace is used for return air connection. A150580 Fig.
Bottom Return Air Inlet These furnaces are shipped with bottom closure panel installed in bottom return--air opening. Remove and discard this panel when bottom return air is used. To remove bottom closure panel, see Fig. 27 and 28. Side Return Air Inlet These furnaces are shipped with bottom closure panel installed in bottom return--air opening. This panel MUST be in place when side return air inlet(s) are used without a bottom return air inlet.
Table 5 – Filter Media Pressure Drop (Clean) Versus Airflow -- In. W.C. (Pa) 14 x 25 Filter CFM L/s 600 (283) 800 (378) 1000 (472) 1200 (566) Factory-Accy Washable (1-in. / 2.5 cm) 0.04 (12) 0.06 (15) 0.07 (18) 0.08 (20) Representative After-Market Filter Media* Fiberglass* Pleated* (1-in. / 2.5 cm) (2-in. / 5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm) 0.07 (17) 0.10 (26) 0.24 (60) 0.16 (40) 0.10 (25) 0.15 (39) 0.34 (85) 0.23 (59) 0.13 (34) 0.21 (52) 0.32 (81) 0.17 (43) 0.
Table 7 – Air Filter Selection and Duct Sizing -- In.
Table 8 – Opening Dimensions -- In. (mm) FURNACE CASING WIDTH IN.
Table 9 – Air Delivery -- CFM (With Filter) UNIT SIZE 0261410 0401410 0401712 0601412 0601714 0801716 0802120 1002120 1202420 1402422 WIRE LEAD COLOR Black Yellow Orange Blue Red Gray Yellow Orange Blue Red Gray Yellow Blue Orange Red Gray Yellow Blue Orange Red Gray Yellow Orange Blue Red Gray Yellow Blue Orange Red Gray Yellow Orange Blue Red Gray Yellow Blue Orange Red Gray Blue Yellow Orange Red Gray Blue Yellow Orange Red SPEED TAPS 2, 3 (Function) Cooling. Do not use for heating.
AIR DUCTS GAS PIPING NOTICE ! Many states, provinces and localities are considering or have implemented standards and/or restrictions on duct sizing practices, ductwork leakage, and/or ductwork thermal, airflow and electrical efficiencies. CONSULT LOCAL CODE OFFICIALS for ductwork design and performance requirements in your area.
sparingly and only to male threads of joints. Pipe dope must be resistant to the action of propane gas. ! WARNING FIRE OR EXPLOSION HAZARD A failure to follow this warning could result in personal injury, death, and/or property damage. If local codes allow the use of a flexible gas appliance connector, always use a new listed connector. Do not use a connector which has previously served another gas appliance.
ELECTRICAL CONNECTIONS ! WARNING ! CAUTION FURNACE MAY NOT OPERATE HAZARD ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD Failure to follow this caution may result in intermittent furnace operation. Failure to follow safety warnings could result in dangerous operation, serious injury, death or property damage. Furnace control must be grounded for proper operation or else control will lock out. Control must remain grounded through green/yellow wire routed to gas valve and manifold bracket screw.
and factory spliced connections must be located inside the external electrical box. Do not leave splice connections unprotected inside the furnace. The J--Box cover, mounting bracket and screws are shipped in the loose parts bag included with the furnace. See Fig. 33 for J--Box mounting locations. The J--Box mounting bracket and green ground screw is used as a grounding point for all line voltage wiring options.
2. Align the J--Box bracket with the pilot holes inside the furnace casing. 3. Install 2 screws through the outside of the casing to secure the J--Box bracket to the furnace casing. 4. Route field power wiring into external electrical box. 5. Pull furnace line voltage power wires through strain--relief bushing of the external electrical box. 6. Pull the ground wire of the field line voltage wiring through the strain--relief bushing into the furnace casing. 7.
24--V Wiring Make field 24--v connections at the 24--v terminal strip. See Fig. 36. Connect terminal Y as shown in Fig. 35 for proper cooling operation. Use only AWG No. 18, color--coded, copper thermostat wire. NOTE: Use AWG No. 18 color-coded copper thermostat wire for lengths up to 100 ft. (31 M). For wire lengths over 100 ft., use AWG No. 16 wire. The 24--v circuit contains an automotive--type, 3--amp. fuse located on the control.
Table 11 – Electrical Data FURNACE SIZE 0261410 0401410 0401712 0601412 0601714 0801716 0802120 1002120 1202420 1402422 OPERATING VOLTAGE RANGE* VOLTS--HERTZ--PHASE Maximum* 115--- 60--- 1 115--- 60--- 1 115--- 60--- 1 115--- 60--- 1 115--- 60--- 1 115--- 60--- 1 115--- 60--- 1 115--- 60--- 1 115--- 60--- 1 115--- 60--- 1 127 127 127 127 127 127 127 127 127 127 Minimum* MAXIMUM UNIT AMPS UNIT AMPACITY# MINIMUM WIRE SIZE AWG MAXIMUM WIRE LENGTH FT (M)} MAXIMUM FUSE OR CKT BKR AMPS{ 104 104 104 10
POLYPROPYLENE VENTING SYSTEMS. Refer to the polypropylene venting system manufacturer’s installation instructions for the polypropylene venting system installation. NOTE: When using polypropylene venting systems, all venting materials used, including the vent terminations, must be from the same manufacturer. est directement relié à l’installation conforme aux instructions cihaut mentionnées. Le standard Canadien recommande l’inspection par un personel qualifié et ce, une fois par année.
Venting Systems combustion--air and vent pipes and be terminated individually, as shown in Fig. 53 for Direct Vent (2--Pipe) system, or Fig. 54 for single--pipe or ventilated combustion air option. A furnace shall not be connected to a chimney flue serving a separate appliance designed to burn solid fuel.
the furnace. See Fig. 52 for references to vent clearances required by National code authorities. NOTICE OPTIONAL VENTING BELOW THE FURNACE The venting system may be positioned below the furnace ONLY IF the factory accessory External Vent Trap Kit is used. The External Vent Trap Kit is only approved for PVC/ABS DWV venting systems. CAREFULLY FOLLOW THE INSTRUCTIONS PROVIDED WITH THE EXTERNAL VENT TRAP KIT FOR LAYING OUT THE VENTING SYSTEM AND THE DRAIN SYSTEM.
! WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow the instructions outlined below for each appliance being placed into operation could result in carbon monoxide poisoning or death. For all venting configurations for this appliance and other gas appliances placed into operation for the structure, provisions for adequate combustion, ventilation, and dilution air must be provided in accordance with: U.S.A. Installations: Current edition of Section 9.3 NFPA 54/ANSI Z223.
FURNACE NOT IN HORIZONTAL SECTION PIPE DIAMETER TRANSITION IN VERTICAL SECTION Fig. 39 -- Combustion Air and Vent Pipe Diameter Transition Location and Elbow Configuration A A A93034 A TO CODE-- APPROVED DRAIN OR CONDENSATE PUMP Recommend “T” fitting with 4--inch minimum height standpipe (A) of same diameter or larger extending upward. Representative drawing only, some models may vary in appearance.
The External Vent Trap Kit accessory may be used as a trap for the combustion air inlet pipe if a large amount of moisture must be removed. The drain line may be connected to the same drain as the furnace condensate and the evaporator coil condensate line ONLY if the inlet air trap drain and the evaporator coil drain empty into an open segment of pipe above the drain. See Fig.17. When using the External Vent Trap Kit, refer to those instructions for proper drain connections.
Configure the Furnace ! Install the Vent and Combustion Air Pipes WARNING 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 used. Failure to properly seal the blower compartment from the furnace vestibule could result in the circulation of carbon monoxide throughout the structure.
TABS ON THE INDUCER OUTLET RESTRICTOR SNAP INTO THE SLOTS AT THE OUTLET OF THE INDUCER FOR USAGE: SEE MAXIMUM EQUIVALENT VENT LENGTH TABLE (10FT. (3.1 M) OF VENT OR LESS ONLY) A170006 Fig. 42 -- Inducer Vent Elbow Installing the Vent Pipe Adapter and Combustion Air Pipe Adapter WARNING ! 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 used.
8. 9. 10. 11. 12. 13. 14. A13074 Fig. 43 -- Vent Coupling and Adapter with Gaskets Table 13 – Hanger Spacing Material Diameter PVC Sch 40 SDR 21 & 26 ABS CPVC Polypropylene 1 1/2--in. 3--ft. 2 1/2--ft. 3--ft. 3--ft. 3.25--ft. 38--mm 914--mm 762--mm 914--mm 914--mm 1000 mm 2--in. 3--ft. 3--ft. 3--ft. 3--ft. 3.25--ft. 51--mm 914--mm 914--mm 914--mm 914--mm 1000 mm 2 1/2--in. 3 1/2--ft. 3--ft. 3 1/2--ft. 3 1/2--ft. 3.25--ft.
Optional Installation of the Vent Pipe NOTE: DO NOT USE THIS TECHNIQUE FOR POLYPROPYLENE VENTING SYSTEMS. This option provides a disconnect point for the vent pipe. The vent pipe must be cemented to the plastic vent pipe adapter to maintain a sealed vestibule. See Fig. 49. 1. Insert a length of vent pipe through the casing into the outlet of the vent elbow. 2. Slide the plastic vent pipe adapter over the length of the vent pipe down to the furnace casing.
termination, or pair of vent terminations, must be at least 36 in. (914 mm) away from the first two terminations. It is important that vent terminations be made as shown in Fig. 53 to avoid recirculation of vent gases. NOTICE RECOMMENDED SUPPORT FOR VENT TERMINATIONS Inducer Outlet Restrictor It is recommended that sidewall vent terminations in excess of 24 inches (0.
Table 15 – Maximum Allowable Exposed Vent Length in Unconditioned Space -- Ft. / M Unit Size Pipe Dia. In. 20 Winter 0 Design Temp --- 20 °F --- 40 Unit Size Pipe Dia. in. Winter Design Temp ° F 20 0 -20 -40 Uninsulated 1½ 2 2½ 20 20 20 10 5 5 5 Unit Size Pipe Dia. in. Winter Design Temp °F 1½ 15 15 15 10 20 0 -20 -40 Unit Size Pipe Dia. in. Winter Design Temp ° F Winter Design Temp ° F 2 20 20 15 10 20 0 -20 -40 Unit Size Pipe Dia. in.
Table 16 – Maximum Equivalent Vent Length -- Ft. NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows. Use Table 17 - Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application. Unit Size Pipe Dia. (in) 0--- 2000 2001--- 3000 3001--- 4000 4001--- 4500 Altitude 4501--- 5000 (feet) 5001--- 6000 6001--- 7000 7001--- 8000 8001--- 9000 9001--- 10000 Unit Size Pipe Dia.
Venting System Length Calculations The Total Equivalent Vent Length (TEVL) 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 17. Standard vent terminations or factory accessory concentric vent terminations count for zero deduction. See vent system manufacturer’s data for equivalent lengths of flexible vent pipe or other termination systems.
A190032 Inside Corner Terminations Fig. 44 -- Inside Corner Termination Inside corner vent terminations are permitted provided that: S Only two exterior walls come together to form an angle of 90 degrees to 135 degrees. There are no other exterior walls attached to either wall to form an alcove. S The clearance distances apply when the vent is at least 3 feet (1 meter) from, but not more than 6 feet (2 meters) away from an inside corner.
7 Rotate vent elbow to required position. 3 6 2 5 4 5 1 Any other unused knockout may be used for combustion air connection. 4 Rotate vent elbow to required position. 5 1 3 2 & 5 6 7 UPFLOW LEFT CONFIGURATION DOWNFLOW LEFT CONFIGURATION A11309A A11311A Rotate vent elbow to required position. 4 5 1 2 5 3 7 6 2 5 1 Any other unused knockout may be used for combustion air connection. Any other unused knockout may be used for combustion air connection.
ALTERNATE COMBUSTION AIR CONNECTIONS HORIZONTAL LEFT ---VERTICAL VENT CONFIGURATION HORIZONTAL RIGHT ---VERTICAL VENT CONFIGURATION A11327A A11337 Alternate combustion air connection. 4 Rotate vent elbow to required position.
NOTES FOR VENTING OPTIONS 1. 2. 3. 4. 5. 6. 7. Attach vent pipe adapter with gasket to furnace casing. Align notches in rubber coupling over standoffs on adapter. Slide clamps over the coupling. Slide vent pipe through adapter and coupling into vent elbow. Insert vent pipe into vent elbow. Torque all clamps 15 lb.--in. Attach combustion air pipe adapter with gasket to furnace. Attach combustion air pipe to adapter with silicone. Pilot drill a1/8--in. hole in adapter and secure with a #7 x 1/2--in.
V V A12326 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.
V V A12325 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.
¾ in. (222mm) for 3 in. (76mm) ¾ in. (172mm) for 2 in. (51mm) 12 in. (305mm) min. separation between bottom of combustion air and bottom of vent (Typ.) A13305 Fig. 53 -- Combustion Air and Vent Pipe Termination for Direct Vent (2--Pipe) 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) 12 in. min. (305 mm)from overhang or roof 6 in.
A13078 Fig. 55 -- Alberta and Saskatchewan Vent Termination Fig. 56 -- Vent Terminations for Ventilated Combustion Air 440 01 4501 01 Specifications subject to change without notice.
START--UP, ADJUSTMENT, AND SAFETY CHECK NOTICE CAUTION ! UNIT OPERATION HAZARD Important Installation and Start--up Procedures Failure to follow this procedure may result in a nuisance smoke or odor complaint. The manifold pressure, gas rate by meter clocking, temperature rise and operation must be checked after installation. Minor smoke and odor may be present temporarily after start--up from the manufacturing process. Some occupants are more sensitive to this minor smoke and odor.
Adjustments ! NOTICE WARNING FIRE HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. DO NOT bottom out gas valve regulator adjusting screw. This can result in unregulated manifold pressure and result in excess overfire and heat exchanger failures. ! CAUTION FURNACE DAMAGE HAZARD Failure to follow this caution may result in reduced furnace life. The 26,000 BTUH model has a lower nominal manifold pressure than other models.
Table 18 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate 40,000 BTUH to 120,000 BTUH SINGLE-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE AVG. GAS RANGE HEAT VALUE U.S.A. and Canada ft (m) U.S.A. and Canada U.S.A. Only U.S.A. Only 0.62 0.64 Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold (Btu/cu ft) No. Pressure No. Pressure No. Pressure No. Pressure 900 43 3.8 42 3.
Table 18 -- Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate (Cont.) 40,000 BTUH to 120,000 BTUH SINGLE-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE AVG. GAS RANGE HEAT VALUE U.S.A. Only ft (m) U.S.A. Only 0.60 0.62 0.64 AT ALTITUDE Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold (Btu/cu ft) No. Pressure No. Pressure No. Pressure No. Pressure 650 42 3.4 42 3.5 42 3.
Table 19 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate 26,000 BTUH ONLY ORIFICE SIZE* AND MANIFOLD PRESSURE (IN WC) FOR GAS INPUT RATE (TABULATED DATA BASED ON 13,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL ALTITUDE AVG. GAS RANGE HEAT VALUE SPECIFIC GRAVITY OF NATURAL GAS 0.58 AT ALTITUDE Orifice U.S.A. Only U.S.A. Only U.S.A. Only U.S.A. Only U.S.A. and Canada U.S.A. and Canada ft (m) (Btu/cu ft) No. 0.60 0.62 0.
Table 21 (Continued) -- Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate 26,000 BTUH ONLY ORIFICE SIZE* AND MANIFOLD PRESSURE (IN WC) FOR GAS INPUT RATE U.S.A. Only U.S.A. Only U.S.A. Only (TABULATED DATA BASED ON 13,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL 650 43 1.7 43 1.8 42 1.5 42 1.6 7001 675 44 1.8 43 1.7 43 1.7 43 1.8 (2134) 700 44 1.7 44 1.8 44 1.8 43 1.7 725 44 1.6 44 1.7 44 1.7 44 1.8 to 750 44 1.5 44 1.5 44 1.
Adjust Manifold Pressure NOTE: There are two manifold pressure tables in these instructions. USE TABLE 19 FOR THE LOW CAPACITY 26,000 BTUH MODELS. The low capacity model can be identified by the green label affixed to the top of the gas valve. For all other models, see Table 18. 1. Adjust manifold pressure to obtain proper gas input rate. See Fig. 59. a. Refer to the correct manifold pressure table for the appropriate model. b. Turn gas valve ON/OFF switch to OFF. c.
temperature measurements, due to possible changes in duct static pressure and airflow. CAUTION ! blower motor lead from control HEAT terminal. See Fig. 36. Select desired blower motor speed lead from one of the other motor leads and relocate it/them to HEAT (heating blower tap) terminal(s). Reconnect original lead on SPARE terminal.
3. Record amp draw across terminals when furnace is in low heat and after blower starts. 4. Set heat anticipator on thermostat per thermostat instructions and install on subbase or wall. 5. Install blower access door. THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED (ANITICIPATOR, CLOCK, ETC., MUST BE OUT OF CIRCUIT.) HOOK-AROUND AMMETER R Y W G c. Turn on 115--v power to furnace. d. Set thermostat to “call for heat” and wait 1 minute.
A190101 Fig. 62 -- Service Label Information 440 01 4501 01 Specifications subject to change without notice.
Table 22 – Gas Rate (CU ft./hr) SECONDS FOR 1 REVOLUTION 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 SIZE OF TEST DIAL 1 Cu Ft. 2 Cu Ft. 5 Cu Ft.
The electrical ground and polarity for 115--v wiring must be properly maintained. Refer to Fig. 35 for field wiring information and to Fig. 69 for furnace wiring information. NOTE: If the polarity is not correct, the STATUS LED on the control will display status code 10 and prevent the furnace from heating. The control system also requires an earth ground for proper operation of the control and flame--sensing electrode. The 24--v circuit contains an automotive--type, 3--amp. fuse located on the control.
Care and Maintenance ! WARNING FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. Never store flammable or combustible materials on, near, or in contact with the furnace, such as: 1. Spray or aerosol cans, rags, brooms, dust mops, vacuum cleaners, or other cleaning tools. 2.
2. Remove blower door. 3. All factory wires can be left connected, but field thermostat and accessory wiring may need to be disconnected depending on their length and routing. 4. If the vent and combustion air pipe passes through the blower compartment, it will be necessary to remove the pipes from the blower compartment. Disconnect the vent and combustion air pipe by: a. Loosen the clamps on the vent couplings and combustion air pipe external to the furnace. b.
11. Verify that blower wheel is centered in blower housing and set screw contacts the flat portion of the motor shaft. Loosen set screw on blower wheel and reposition if necessary. 12. Spin the blower wheel by hand to verify that the wheel does not rub on the housing. 13. Reinstall blower assembly in furnace. 14. Reinstall 2 screws securing blower assembly to blower deck. 15. Reconnect blower leads to furnace control. Refer to furnace wiring diagram, and connect thermostat leads if previously disconnected.
To reinstall burner assembly: 1. Install the Hot Surface Igniter (HSI) and bracket in burner assembly. 2. Install flame sensor on burner. 3. Align the edges of the one-piece burner with the slots in the burner assembly and slide the burners forward until they are fully seated in the burner assembly. 4. Align the orifices in the manifold assembly with the support rings on the end of the burner. 5. Insert the orifices in the support rings of the burners.
NOTE: Ensure the pressure switch tube disconnected from the pressure switch is higher than the collector box opening or water will flow out of tube. 4. Remove the collector box plug from the top port on the upper corner of the collector box. See Fig. 57. 5. Attach a funnel with a flexible tube to port on the collector box. 6. Flush inside of collector box with water until discharge water from condensate trap is clean and runs freely. 7.
! CAUTION UNIT AND PROPERTY DAMAGE HAZARD Failure to follow this caution may result in unit component or property damage. If the furnace is installed in an unconditioned space where the ambient temperatures may be 32_ F (0_ C) or lower, freeze protection measures must be taken to prevent minor property or product damage. A11273 Fig. 67 -- Cleaning Heat Exchanger Cell 2. Remove control door. 3. Disconnect wires or connectors to flame rollout switch, gas valve, igniter, and flame sensor. 4.
faults are detected. After the 90--sec period, the furnace will respond to the thermostat normally. The blower door must be installed for power to be conducted through the blower door interlock switch ILK to the furnace control CPU, transformer TRAN, inducer motor IDM, blower motor BLWM, hot--surface igniter HSI, and gas valve GV. 1. Heating See Fig. 36 and 37 for thermostat connections. The wall thermostat “calls for heat,” closing the R--to--W circuit.
440 01 4501 01 Specifications subject to change without notice. 75 Go to section below for the flashed status code. Determine status code. The status code is a single or two digit number with the first number determined by the number of short flashes and the second number after the plus (+) sign, the number of long flashes.
A190092 Fig. 68 -- Troubleshooting Guide (Cont) 76 Specifications subject to change without notice.
344442--2 Rev. C A190259 Fig. 69 -- Wiring Diagram 440 01 4501 01 Specifications subject to change without notice.
PARTS REPLACEMENT INFORMATION GUIDE Casing Group Gas Control Group Blower door Bottom plate Control door Door knob assembly Top filler plate Burner Flame sensor Gas valve Hot surface igniter Manifold Orifice Electrical Group 3--Amp fuse Circuit board Control box Door switch Junction box Limit switch(es) Transformer Heat Exchanger Group Blower Group Inducer Group Blower housing Blower motor Blower wheel Cut--off plate Power choke (where used) Collector box Condensate trap Condensate trap elbow Gaske
