Page 1 08/13 *2p0813* 507054-01 *p507054-01* p.O. Box 799900, dallas, tx 75379-9900 installation instructions 95af2dfv warm air gas furnaces upflow/horizontal left and right air discharge this is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be ...
Page 2 95af2dfv unit dimensions air exhaust air outlet combustion air intake flow gas piping inlet (either side) 9−1/8 (232) right 6−9/16 (167) left 2 (51) either side condensate trap connection 6−7/16 (163) either side 9 (229) either side (either side) 1 (25) 2−1/16 (52) electrical inlet (either si...
Page 3 95af2dfv parts arrangement 95af2dfv parts identification figure 1 combustion air inducer burner box assembly (includes sensor, rollout switches and ignitor) gas valve cold end header box primary limit combustion air inducer pressure switch control box (includes integrated control, transformer...
Page 4 95af2dfv gas furnace the 95af2dfv category iv gas furnace is shipped ready for installation in the upflow or horizontal position. The fur nace is shipped with the bottom panel in place. The bottom panel must be removed if the unit is to be installed in hori zontal or upflow applications wit...
Page 5 in order to ensure proper unit operation in non-direct vent applications, combustion and ventilation air supply must be provided according to the current national fuel gas code or csa‐b149 standard. Installation locations this furnace is csa international certified for installation clearances...
Page 6 d the input rate and temperature rise must be set per the furnace rating plate. D one hundred percent (100%) outdoor air must be pro vided for combustion air requirements during construc tion. Temporary ducting may supply outdoor air to the furnace. Do not connect duct directly to the furna...
Page 7 caution do not install the furnace in a corrosive or contami nated atmosphere. Meet all combustion and ventila tion air requirements, as well as all local codes. All gas‐fired appliances require air for the combustion pro cess. If sufficient combustion air is not available, the fur nace o...
Page 8 figure 6 equipment in confined space - all air from outside (inlet air from crawl space and outlet air to outside) note -the inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 btu (645mm 2 per 1.17kw) per hour of the total input rating of all equip...
Page 9 figure 9 equipment in confined space - all air from outside (all air through ventilated attic) note -the inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 btu (645mm 2 per 1.17kw) per hour of the total input rating of all equipment in the enclosur...
Page 10 figure 12 setting equipment front view side view air flow air flow unit front 1/2” max. Air flow unit front unit must be level side-to-side. Unit may be positioned from level to 1/2” toward the front to aid in draining. Side view figure 13 front note - do not install the furnace on its front...
Page 11 warning improper installation of the furnace can result in per sonal injury or death. Combustion and flue products must never be allowed to enter the return air system or air in the living space. Use sheet metal screws and joint tape to seal return air system to furnace. In platform install...
Page 12 table 2 combustible flooring base opening size cabinet width catalog number front to rear side to side in. Mm in. Mm b cabinet (17.5”) 11m60 22 559 18 - 3/4 476 c cabinet (21”) 11m61 22 559 22 - 3/4 578 figure 16 furnace supply air plenum combustible flooring base properly sized floor openin...
Page 13 filters this unit is not equipped with a filter or rack. A field-pro vided high velocity rated filter is required for the unit to oper ate properly. Table 3 lists recommended filter sizes. A filter must be in place whenever the unit is operating. Important if a highefficiency filter is be...
Page 14 caution solvent cements for plastic pipe are flammable liq uids and should be kept away from all sources of ignition. Do not use excessive amounts of solvent cement when making joints. Good ventilation should be maintained to reduce fire hazard and to minimize breathing of solvent vapors. A...
Page 15 table 5 outdoor termination usage* input size vent pipe dia. In. Standard concentric flush mount kit wall kit wall ring kit field fabricated 1-1/2 inch 2 inch 3 inch 2 inch 3 inch 2 inch 51w11 (us) 51w12 (ca) 22g44 (us) 4 30g28 (ca) 44j40 (us) 4 81j20 (ca) 15f74 71m80 (us) 4 44w92 (ca) 69m2...
Page 16 joint cementing procedure all cementing of joints should be done according to the specifications outlined in astm d 2855. Note - a sheet metal screw may be used to secure the intake pipe to the connector, if desired. Use a drill or self tapping screw to make a pilot hole. Danger danger of ex...
Page 17 2 - when furnace is installed in a residence where unit is shut down for an extended period of time, such as a vacation home, make provisions for draining conden sate collection trap and lines. Removal of the furnace from common vent in the event that an existing furnace is removed from a v...
Page 18 vent piping guidelines the 95af2dfv can be installed as either a non-direct vent or a direct vent gas central furnace. Note - in non‐direct vent installations, combustion air is taken from indoors or ventilated attic or crawlspace and flue gases are discharged outdoors. In direct vent instal...
Page 19 table 7 maximum allowable intake or exhaust vent length size intake and exhaust pipe length separately. Values in table are for intake or exhaust, not combined total. Intake and exhaust must be same pipe size. Note - additional vent pipe and elbows used to terminate the vent pipe outside the...
Page 20 table 8 maximum allowable exhaust vent length using ventilated attic or crawl space for intake air in feet note - additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation. Standard termination at elevation 0 -...
Page 21 figure 23 typical exhaust pipe connections transition 2” 2” 2” 3” pipe size determined in table 7. 2” 2” or do not transition from smaller to larger pipe size in horizontal runs of exhaust pipe. Top view exhaust intake * when transitioning up in pipe size, use the shortest length of 2” pvc p...
Page 22 intake piping the 95af2dfv furnace may be installed in either direct vent or non-direct vent applications. In non-direct vent applications, when intake air will be drawn into the furnace from the surrounding space, the indoor air quality must be considered. Guidelines listed in combustion, d...
Page 23 figure 27 typical air intake pipe connections non−direct vent applications air intake screen (provided) note - air intake screen and elbow may be rotated, so that screen may be positioned to face forward or to either side. Follow the next two steps when installing the unit in non‐ direct ven...
Page 24 table 9 maximum allowable exhaust vent pipe length without insulation in unconditioned space for winter design temperatures two - stage high efficiency furnace winter design temperatures 1 °f (°c) vent pipe diameter unit input size 045 070 090 110 135 32 to 21 (0 to -6) pvc pvc pvc pvc pvc 2...
Page 25 figure 29 vent termination clearances for non-direct vent installations in the usa and canada k d e l b c f g a b j a m i h inside corner detail vent terminal air supply inlet area where terminal is not permitted fixed closed operable b fixed closed operable b b a = b = c = d = e = f = g = h...
Page 26 figure 30 vent termination clearances for direct vent installations in the usa and canada k d e l b c f g a b j a m i h inside corner detail vent terminal air supply inlet area where terminal is not permitted fixed closed operable b fixed closed operable b b a = b = c = d = e = f = g = h = i...
Page 27 details of intake and exhaust piping terminations for direct vent installations note - in direct vent installations, combustion air is taken from outdoors and flue gases are discharged to outdoors. Note - flue gas may be slightly acidic and may adversely affect some building materials. If an...
Page 28 7 - if intake and exhaust piping must be run up a side wall to position above snow accumulation or other ob structions, piping must be supported. At least one bracket must be used within 6” from the top of the el bow and then every 24” (610mm) as shown in figure 34, to prevent any movement...
Page 29 figure 34 see venting table 3 for maximum venting lengths with this arrangement. * use wall support every 24” (610 mm). Use two wall supports if extension is greater than 24” (610 mm) but less than 48” (1219 mm). Note − one wall support must be within 6” (152 mm) from top of each pipe (intak...
Page 30 figure 35 direct vent concentric rooftop termination 71m80, 69m29 or 60l46 (us) 44w92 or 44w93 (canada) minimum above average snow accumulation sheet metal strap (clamp and sheet metal strap must be field installed to support the weight of the termination kit.) flashing (not furnished) clamp...
Page 31 4 - distance between exhaust pipe terminations on mul tiple furnaces must meet local codes. Figure 40 non-direct vent roof termination kit (15f75 or 44j41) unconditioned attic space 3” (76mm) or 2” (51mm) pvc provide support for exhaust lines 12” (305mm) above ave. Snow accumulation size te...
Page 32 figure 43 tubin g hose clamp barbed fitting field provided drain components elbow 6 - if unit will be started immediately upon completion of installation, prime trap per procedure outlined in unit start-up section. Condensate line must slope downward away from the trap to drain. If drain lev...
Page 33 figure 47 drain trap assembly (furnished) vent drain trap clean out 5 feet maximum coupling 3/4 inch slip x slip (not furnished) 90 ° elbow 3/4 inch pvc (not furnished) 3/4 inch pvc pipe (not furnished) 1/2 inch pvc pipe (not furnished) condensate drain connection in unit drain assembly for ...
Page 34 gas piping gas supply piping should not allow more than 0.5”w.C. Drop in pressure between gas meter and unit. Supply gas pipe must not be smaller than unit gas connection. Caution if a flexible gas connector is required or allowed by the authority that has jurisdiction, black iron pipe shall...
Page 35 ground joint union field provided and installed left side piping (standard) drip leg manual main shut-off valve right side piping (alternate) note - black iron pipe only to be routed inside of cabinet ground joint union drip leg manual main shut-off valve gas valve gas valve figure 49 field ...
Page 36 electrical electrostatic discharge (esd) precautions and procedures caution electrostatic discharge can affect elec tronic components. Take precautions to neutralize electrostatic charge by touching your hand and tools to metal prior to handling the control. The unit is equipped with a fiel...
Page 37 one line voltage “hum” 1/4” spade terminal is pro vided on the furnace integrated control. Any humidifier rated up to one amp can be connected to this terminal with the neutral leg of the circuit being connected to one of the provided neutral terminals. See figure 56 for control configurati...
Page 38 w1 on the integrated control must be connected to w1 on the thermostat. Figure 54 automatic heat staging humidifier terminals are provided on the integrated ignition/blower control for connection to a 120-volt humidifier. The “hum” terminal is energized whenever the thermostat calls for heat...
Page 39 95af2dfv schematic wiring diagram figure 55.
Page 40 integrated control figure 56 terminal designations hum -humidifier (120vac) line - input (120vac) xfmr - transformer (120vac) cont - continuous blower eac - indoor air accessory (120vac) cool - cool speed (120vac) park 1 - dead terminal for alternate speed tap park 2 - dead terminal for alte...
Page 41 unit start-up for your safety read before operating warning do not use this furnace if any part has been under water. A flood-damaged furnace is extremely dan gerous. Attempts to use the furnace can result in fire or explosion. Immediately call a qualified service technician to inspect the...
Page 42 4 - move gas valve switch to off. 5 - replace the access panel. Failure to operate if the unit fails to operate, check the following: 1 - is the thermostat calling for heat? 2 - are access panels securely in place? 3 - is the main disconnect switch closed? 4 - is there a blown fuse or trippe...
Page 43 proper combustion furnace should operate minimum 15 minutes with correct manifold pressure and gas flow rate before checking com bustion. Take combustion sample beyond the flue outlet and compare to the tables below. Table 16 95af2 model co 2 % for nat co 2 % for l.P low fire high fire low ...
Page 44 testing for proper venting and sufficient combustion air for non-direct vent applicaitons warning carbon monoxide poisoning hazard! Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monox ide pois...
Page 45 other unit adjustments primary limit . The primary limit is located on the heating compartment vestibule panel. This limit is factory set and requires no ad justment. Flame rollout switches (two) these manually reset switches are located on the front of the burner box. Pressure switch the p...
Page 46 warning the system must not be in either the passive or ac tive dehumidification mode when charging a cooling system. Single stage cooling a call for cooling from the thermostat closes the r to y cir cuit on the integrated ignition/blower control board. The control waits for a 1-second del...
Page 47 winterizing and condensate trap care 1 - turn off power to the furnace. 2 - have a shallow pan ready to empty condensate water. 3 - remove the clean out cap from the condensate trap and empty water. Inspect the trap then reinstall the clean out cap. Cleaning heat exchanger if cleaning the he...
Page 48 cleaning the burner assembly (if needed) 1 - turn off electrical and gas power supplies to furnace. Remove upper and lower furnace access panels. 2 - disconnect the 2-pin plug from the gas valve. 3 - remove the burner box cover (if equipped). 4 - disconnect the gas supply line from the gas v...
Page 49 start-up and performance check list gas supply pressure supply air line voltage gas supply natural gas lp propane gas piping connections tight leak tested supply line pressure “w.C.________ 1 intake / exhaust pipe all joints primed and glued terminations installed properly pipes sup ported ...
Page 50 contractor's: name_________________________telephone_____________checklist completed____________________ job address_____-________________________________technician's name___________________________________ 1 heating mode gas manifold pressure “w.C._____ combustion sample co 2 % ______ co pp...
Page 51 requirements for commonwealth of massachusetts modifications to nfpa-54, chapter 10 revise nfpa-54 section 10.8.3 to add the following re quirements: for all side wall, horizontally vented, gas-fueled equipment installed in every dwelling, building or structure used in whole or in part for ...
Page 52 for the province of ontario, horizontal sidewall vent applications only for exterior horizontal venting applications, the 2” x 1.5” reducer for 2” venting at the point where the exhaust pipe exits the structure is not required in direct or nondirect vent applications in the province of onta...
