Armstrong A96UH2E Installation Instructions Manual Download

Page: 4 / 59

507581-04

Page 4 of 59

Issue 1933

A96UH2E Gas Furnace

The A96UH2E Category IV gas furnace is shipped ready

for installation in the upflow or horizontal position. The

furnace is shipped with the bottom panel in place. The

bottom panel must be removed if the unit is to be installed

in horizontal or upflow applications with bottom return air.

The A96UH2E can be installed as either a Direct Vent

or a Non-Direct Vent Gas Central Furnace.

Exception

A96UH2E030XE24B is direct vent only

The furnace is equipped for installation in natural gas

applications. A conversion kit (ordered separately) is

required for use in propane/LP gas applications.

NOTE

In Direct Vent installations, combustion air is taken

from outdoors and flue gases are discharged outdoors.

Non-Direct Vent installations, combustion air is taken from

indoors or a ventilated attic or crawl space and flue gases

are discharged outdoors. See Figure 2 and Figure 3 for

applications involving roof termination.

Figure 2.

Figure 3.

Shipping and Packing List

1 - Assembled Gas Furnace

1 - Bag assembly containing the following:

1 - Snap bushing
1 - Snap Plug
1 - Wire tie
1 - Condensate trap
1 - Condensate trap cap
1 - Condensate trap clamp
1 - 2” Diameter debris screen
1 - 3/4” Threaded street elbow

Check equipment for shipping damage. If you find any

damage, immediately contact the last carrier.

Please refer to specification sheets for available

accessories.

Safety Information

Improper installation, adjustment, alteration, service

or maintenance can cause property damage, personal

injury or loss of life. Installation and service must be

performed by a licensed professional installer (or

equivalent), service agency or the gas supplier.

WARNING

As with any mechanical equipment, personal injury can

result from contact with sharp sheet metal edges. Be

careful when you handle this equipment.

CAUTION

DANGER OF EXPLOSION!

There are circumstances in which odorant used with

LP/Propane gas can lose its scent. In case of a leak,

LP/Propane gas will settle close to the floor and may be

difficult to smell. An LP/Propane leak detector should be

installed in all LP applications.

DANGER

Use only the type of gas approved for use with this furnace.

Refer to unit nameplate.

A96UH2E units are CSA International certified to ANSI

Z21.47 and CSA 2.3 standards.

Summary of Contents for A96UH2E

Page 1: ...equivalent service agency or the gas supplier WARNING As with any mechanical equipment personal injury can result from contact with sharp sheet metal edges Be careful when you handle this equipment CAUTION Save these instructions for future reference P 507581 04 P507581 04 Manufactured By Allied Air Enterprises LLC A Lennox International Inc Company 215 Metropolitan Drive West Columbia SC 29170 Ta...

Page 2: ...nel COMBUSTION AIR INTAKE 2 51 Either Side 2 51 CONDENSATE TRAP CONNECTION Either Side 1 NOTE 20 C D 5 Ton size units installed in upflow applications that require air volumes of 1800 cfm 850 L s or greater must have one of the following 1 Single side return air with transition to accommodate 20 x 25 x 1 in 508 x 635 x 25 mm air filter 2 Single side return air with optional RAB Return Air Base 3 B...

Page 3: ...507581 04 Issue 1933 Page 3 of 59 Figure 1 Parts Arrangement ...

Page 4: ...Bag assembly containing the following 1 Snap bushing 1 Snap Plug 1 Wire tie 1 Condensate trap 1 Condensate trap cap 1 Condensate trap clamp 1 2 Diameter debris screen 1 3 4 Threaded street elbow Check equipment for shipping damage If you find any damage immediately contact the last carrier Please refer to specification sheets for available accessories Safety Information Improper installation adjus...

Page 5: ...o obtain a temperature rise within the range specified on the unit nameplate Failure to do so may cause erratic limit operation and premature heat exchanger failure This furnace must be installed so that its electrical components are protected from water Installed in Combination with a Cooling Coil When this furnace is used with cooling units Figure 4 it shall be installed in parallel with or on t...

Page 6: ...ILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS FAILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS VOIDS THE MANUFACTURER S EQUIPMENT LIMITED WARRANTY ALLIED AIR DISCLAIMS ALL LIABILITY IN CONNECTION WITH INSTALLER S FAILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS General These instructions are intended as a general guide and do not supersede local codes in any way Consult authorities...

Page 7: ...sion from the National Fuel Gas Code ANSI Z223 1 NFPA 54 This reprinted material is not the complete and official position of ANSI on the referenced subject which is represented only by the standard in its entirely In Canada refer to the CSA B149 Installation codes Do not install the furnace in a corrosive or contaminated atmosphere Meet all combustion and ventilation air requirements as well as a...

Page 8: ...be within 12 inches 305 mm of the top of the enclosure and one opening within 12 inches 305 mm of the bottom See Figure 5 Figure 5 Equipment in Confined Space All Air From Inside Air from Outside If air from outside is brought in for combustion and ventilation the confined space shall be provided with two permanent openings One opening shall be within 12 305 mm of the top of the enclosure and one ...

Page 9: ...t in Confined Space Inlet Air from Ventilated Crawlspace 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 645mm2per 1 17kW per hour of the total input rating of all equipment in the enclosure Roof Terminated Exhaust Pipe Furnace Ventilation Louvers Crawl space Intake Debris Screen Provided Inlet Air Minimum 12 in...

Page 10: ...e furnace is placed into operation After the bolt and washer have been removed the rigid leg will not touch the blower housing Figure 11 Units with 1 2 HP Blower Motor Upflow Applications The gas furnaces can be installed as shipped in the upflow position Refer to Figure 13 for clearances Select a location that allows for the required clearances that are listed on the unit nameplate Also consider ...

Page 11: ...4 in 610 mm Maintain a minimum of 24 in 610 mm for front service access Allow proper clearances to accommodate condensate trap installation For installations on a combustible floor do not install the furnace directly on carpeting tile or other combustible materials other than wood flooring Return Air Guidelines Return air can be brought in through the bottom or either side of the furnace installed...

Page 12: ...ensions for units requiring 1800 cfm or more of air W x H 23 x 11 in 584 x 279 mm The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown Side return air openings must be cut in the field There are cutting guides stenciled on the cabinet for the side return air opening The size of the opening must not extend beyond the markings on the furnace cabine...

Page 13: ...aust piping installation Cooling coils and supply and return air plenums must be supported separately NOTE When the furnace is installed on a platform or with the horizontal suspension kit in a crawl space it must be elevated enough to avoid water damage accommodate drain trap and to allow the evaporator coil to drain Platform Installation of Horizontal Unit 1 Select location for unit keeping in m...

Page 14: ...f a furnace with bottom return air is installed on a platform make an airtight seal between the bottom of the furnace and the platform to ensure that the unit operates properly and safely Use fiberglass sealing strips caulking or equivalent sealing method between the plenum and the furnace cabinet to ensure a tight seal If a filter is installed size the return air duct to fit the filter frame Pipe...

Page 15: ...ith cement forcefully insert end of pipe into socket until it bottoms out Turn PVC pipe 1 4 turn during assembly but not after pipe is fully inserted to distribute cement evenly Do not turn ABS or cellular core pipe NOTE Assembly should be completed within 20 seconds after last application of cement Hammer blows should not be used when inserting pipe 8 After assembly wipe excess cement from pipe a...

Page 16: ...outlet when this kit is used with this furnace Venting Piping Suspension Guidelines NOTE Isolate piping at the point where it exits the outside wall or roof in order to prevent transmission of vibration to the structure Wall Thickness Guidelines Figure 21 1 In areas where piping penetrates joist or interior walls hole must be large enough to allow clearance on all sides of pipe through center of h...

Page 17: ...ther gas burning appliances to their previous mode of operation 7 If a venting problem is found during any of the preceding tests the common venting system must be modified to correct the problem Resize the common venting system to the minimum vent pipe size determined by using the appropriate tables in Appendix G These are in the current standards of the National Fuel Gas Code ANSI Z223 1 Figure ...

Page 18: ...tems which include multiple pipe sizes NOTE All horizontal runs of exhaust pipe must slope back toward unit A minimum of 1 4 6 mm drop for each 12 305 mm of horizontal run is mandatory for drainage NOTE Exhaust pipe MUST be glued to furnace exhaust fittings NOTE Exhaust piping should be checked carefully to make sure there are no sages or low spots Figure 23 Exhaust Pipe Horizontal Application Do ...

Page 19: ...8 9 36 21 70 70 48 13 93 92 73 73 10 31 16 65 65 43 8 89 87 68 68 Standard Termination at Elevation 4 501 10 000 ft Number of 90 Elbows Used 1 1 2 Pipe 2 Pipe 2 1 2 Pipe 3 Pipe Model Model Model Model 030 045 70 90 110 030 045 70 90 110 030 045 70 90 110 030 045 70 90 110 1 25 n a n a n a 76 61 39 n a 110 110 88 53 133 132 113 113 2 20 71 56 34 105 105 83 48 128 127 108 108 3 15 66 51 29 100 100 7...

Page 20: ... 74 9 28 13 60 60 44 9 76 76 69 69 10 23 8 55 55 39 n a 71 71 64 64 Concentric Termination Elevation 4 501 10 000 ft Number of 90 Elbows Used 1 1 2 Pipe 2 Pipe 2 1 2 Pipe 3 Pipe Model Model Model Model 030 045 70 90 110 030 045 70 90 110 030 045 70 90 110 030 045 70 90 110 1 25 n a n a n a 68 53 37 n a 100 100 84 49 116 116 109 109 2 20 63 48 32 95 95 79 44 111 111 104 104 3 15 58 43 27 90 90 74 3...

Page 21: ...65 65 43 8 83 82 63 63 8 31 16 60 60 38 3 78 77 58 58 9 26 11 55 55 33 n a 73 72 53 53 10 21 6 50 50 28 68 67 48 48 Standard Termination Elevation 4 501 10 000 ft Number of 90 Elbows Used 1 1 2 Pipe 2 Pipe 2 1 2 Pipe 3 Pipe Model Model Model Model 030 045 70 90 110 030 045 70 90 110 030 045 70 90 110 030 045 70 90 110 1 25 n a n a n a 66 51 29 n a 95 95 73 38 113 112 93 93 2 20 61 46 24 90 90 68 3...

Page 22: ...nly TRANSITION 1 1 2 2 6 MINIMUM Figure 26 TYPICAL EXHAUST PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON DIRECT VENT APPLICATIONS RIGHT HAND DISCHARGE SHOWN SIDE VIEW 45 MAX 45 MAX 2 2 2 2 or 2 12 max EXHAUST TRANSITION 3 2 2 EXHAUST TRANSITION 1 1 2 2 2 EXHAUST or NOTE 1 1 2 Vent Pipe Diameter Allowed Only on 030 045 Units DO NOT transition from larger to smaller pipe in horizontal runs of exhaust...

Page 23: ...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 and guidelines listed in the Combustion Dilution Ventilation Air section must be followed Follow the next two steps when installing the unit in Direct Vent applications where combustion ai...

Page 24: ...ing or a platform Ensure that the intake air inlet will not be obstructed by loose insulation or other items that may clog the debris screen 2 If intake air is drawn from a ventilated attic Figure 31 or ventilated crawlspace Figure 32 the exhaust vent length must not exceed those listed in Table 5C If 3 diameter pipe is used reduce to 2 diameter pipe at the termination point to accommodate the deb...

Page 25: ...as furnace Table 6 Maximum Allowable Exhaust Vent Pipe Length in ft without Insulation in Unconditioned Space for Winter Design Temperatures Winter Design Temperatures1 ºF ºC Vent Pipe Diameter Unit Input Size 030 045 070 090 110 32 to 21 0 to 6 PVC 2 PP PVC 2 PP PVC 2 PP PVC 2 PP PVC 2 PP 2 in 13 12 21 18 33 30 46 42 30 30 2 1 2 in 10 N A 16 N A 26 N A 37 N A 36 N A 3 in 6 6 12 12 21 21 30 30 29 ...

Page 26: ...ets for part numbers For Canadian Installations Only In accordance to CSA International B149 installation codes the minimum allowed distance between the combustion air intake inlet and the exhaust outlet of other appliances shall not be less than 12 inches 305 mm IMPORTANT Do not use screens or perforated metal in exhaust terminations Doing so will cause freeze ups and may block the terminations I...

Page 27: ...ithin a height 15 feet 4 5m above the meter regulator assembly 3 feet 9m 6 inches 152mm for appliances 10 000 pliances 10 000 Btuh 3kw and 50 000 pliances 50 000 Btuh 15kw 6 inches 152mm for appliances 10 000 Btuh 3kw 12 inches 305mm for appliances 10 000 Btuh 3kw and 100 000 Btuh 30kw 36 inches 9m for appliances 100 000 Btuh 30kw 3 feet 9m above if within 10 feet 3m horizontally 6 feet 1 8m 7 fee...

Page 28: ... within a height 15 feet 4 5m above the meter regulator assembly 3 feet 9m 6 inches 152mm for appliances 10 000 pliances 10 000 Btuh 3kw and 50 000 pliances 50 000 Btuh 15kw 6 inches 152mm for appliances 10 000 Btuh 3kw 12 inches 305mm for appliances 10 000 Btuh 3kw and 100 000 Btuh 30kw 36 inches 9m for appliances 100 000 Btuh 30kw 3 feet 9m above if within 10 feet 3m horizontally 6 feet 1 8m 7 f...

Page 29: ... Figure 41 7 If intake and exhaust piping must be run up a side wall to position above snow accumulation or other obstructions piping must be supported every 24 610 mm as shown in Figure 41 Exhaust and intake piping that is run up a wall is considered to be in an unconditioned space so piping should be sized according to Table 6 The intake piping may be equipped with a 90 elbow turndown Using turn...

Page 30: ...ance above grade or average snow accumulation B Horizontal separation between intake and exhaust C Minimum from end of exhaust to inlet of intake D Exhaust pipe length E Wall support distance from top of each pipe intake exhaust 12 305 mm Min 12 305 mm Min 6 152 mm Min 24 610 mm Max 9 227 mm Min 12 305 mm Min 16 405 mm Max 6 152 mm Max 6 152 mm Min 24 610 mm Max 9 227 mm Min 12 305 mm Min 20 508 m...

Page 31: ...trated In any exterior portion of chimney the exhaust vent must be insulated Details of Exhaust Piping Terminations for Non Direct Vent Applications Exhaust pipes may be routed either horizontally through an outside wall or vertically through the roof In attic or closet installations vertical termination through the roof is preferred Figure 45 through Figure 48 show typical terminations 1 Exhaust ...

Page 32: ...scharge through an existing unused chimney or stack is required insert piping inside chimney until the pipe open end is above top of chimney and terminate as illustrated In any exterior portion of chimney the exhaust vent must be insulated Exhaust through Crawl Space Vent Option All 33 condensing gas furnaces 92 are now approved to be vented down through a crawl space Ensure a vent pipe drain kit ...

Page 33: ...ropriate location on the side of the unit Install provided 3 4 NPT street elbow fitting into cold end header box Use Teflon tape or appropriate pipe dope Figure 51 Upflow or Downflow Furnace with Exhaust through Crawl Space KIT 51W18 USA Basement Floor To Termination 1 2 PVC to Code Approved Drain 24 max Downflow Furnace Exhaust KIT 15Z70 Canada Kit 51W18 is shown NOTE Upflow furnaces exhaust from...

Page 34: ...y drain line were to become restricted NOTE In horizontal applications it is recommended to install a secondary drain pan underneath the unit and trap assembly NOTE Vinyl tubing may be used for condensate drain Tubing must be 1 1 4 o d X 1 i d and should be attached to the drain on the trap using a hose clamp 6 If unit will be started immediately upon completion of installation prime trap per proc...

Page 35: ...own a minimum of 1 4 per ft toward trap Figure 55 Evaporator Coil Using a Common Drain Unit shown in horizontal right hand discharge position Piping from furnace must slope down a minimum of 1 4 per ft toward trap Figure 56 Condensate Trap with Optional Overflow Switch Figure 57 Evaporator Coil Using a Common Drain ...

Page 36: ...rnished Drain Assembly for 3 4 inch Drain Pipe Condensate Drain Connection In Unit Condensate Drain Connection In Unit Vent To Drain Condensate Drain Connection In Unit Optional Condensate Drain Connection OptionalDrainPipingFromTrap DrainTrapAssembly Furnished DrainTrap Assembly with 1 2 inch Piping DrainTrap Assembly with 3 4 inch Piping 1 2 inch 3 4 inch 1 25 mm Min 2 50 mm Max Above Top Of Con...

Page 37: ...n vertical pipe runs to serve as a trap for sediment or condensate 5 A 1 8 N P T plugged tap or pressure post is located on the gas valve to facilitate test gauge connection See Figure 60 6 In some localities codes may require installation of a manual main shut off valve and union furnished by installer external to the unit Union must be of the ground joint type Compounds used on threaded joints o...

Page 38: ...ng Standard DRIP LEG MANUAL MAIN SHUT OFF VALVE Gas Valve Figure 62 Gas Piping Horizontal Configuration Horizontal Applications Possible Gas Piping Configurations NOTE BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET FIELD PROVIDED AND INSTALLED GROUND JOINT UNION DRIP LEG MANUAL MAIN SHUT OFF VALVE Horizontal Application Right Side Air Discharge Gas Valve GROUND JOINT UNION DRIP LEG MANUAL MAI...

Page 39: ... 16 42 530 15 01 490 13 87 460 13 03 430 12 18 400 11 33 1 1 2 38 1 1 610 40 894 2100 59 46 460 41 34 1180 33 41 990 28 03 900 25 48 810 22 94 750 21 24 690 19 54 650 18 41 620 17 56 2 50 8 2 067 52 502 3950 111 85 2750 77 87 2200 62 30 1900 53 80 1680 47 57 1520 43 04 1400 39 64 1300 36 81 1220 34 55 1150 32 56 2 1 2 63 5 2 469 67 713 6300 178 39 4350 123 17 3520 99 67 3000 84 95 2650 75 04 2400 ...

Page 40: ...d off for servicing Table 9 Model Maximum Over Current Protection Amps 045B12 070B12 090C12 030B08 090C16 090C20 110C16 15 110C20 20 4 Before connecting the thermostat check to make sure the wires will be long enough for servicing at a later date Make sure that thermostat wire is long enough to facilitate future removal of blower for service 5 Complete the wiring connections to the equipment Use t...

Page 41: ...ure to disconnect power supplies can result in property damage personal injury or death WARNING The furnace must be grounded and wired in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI NFPA No 70 latest edition and or CSA C22 1 Electrical Code latest edition if an external electrical source is utilized In all instances other than wiring for the ...

Page 42: ...ERMOSTAT LO HEAT 24VAC G MANUAL FAN FROM THERMOSTAT PAR C THERMOSTAT SIGNAL GROUND CONNECTED TO TRANSFORMER GRD TR CHASSIS GROUND GRD PAR COMMON 24VAC Y1 THERMOSTAT 1ST STAGE COOL SIGNAL 1 4 QUICK CONNECT TERMINALS Y2 THERMOSTAT 2ND STAGE COOL SIGNAL NEUTRALS 120 NEUTRAL O THERMOSTAT SIGNAL TO HEAT PUMP HUM UNPOWERED NORMALLY OPEN DRY CONTACTS REVERSING VALVE LI 120 VAC INPUT TO CONTROL L NOT USED...

Page 43: ...iated If the switch is toggled to the ON position it will provide a 12 minute delay before second stage heat is initiated This switch is only activated when the thermostat selector jumper is positioned for single stage thermostat use Indoor Blower Operation DIP Switch Settings Switches 3 and 4 Heating Mode Blower Off Delay The blower on delay of 30 seconds is not adjustable The blower off delay ti...

Page 44: ...stage heat ON delay OFF 7 minutes ON 12 minutes ON CUT ON BOARD LINK W915 2 STAGE COMPR DEHUM S1 T STAT FURNACE TERM STRIP OUTDOOR UNIT 1 Heat 2 Cool with t stat with humidity control NOTE Use DIP switch 2 to set second stage heat ON delay OFF 7 minutes ON 12 minutes ON CUT ON BOARD LINK W915 2 STAGE COMPR CUT ON BOARD LINK W914 DEHUM DEHUM S1 T STAT FURNACE TERM STRIP OUTDOOR UNIT Not required on...

Page 45: ...R CUT ON BOARD LINK W914 DEHUM S1 T STAT FURNACE TERM STRIP OUTDOOR UNIT 2 Heat 1 Cool with t stat with humidity control OFF CUT ON BOARD LINK W914 DEHUM S1 T STAT FURNACE TERM STRIP OUTDOOR UNIT Not required on all units 2 Heat 1 Cool OFF DO NOT CUT ANY ON BOARD LINKS DEHUM S1 T STAT FURNACE TERM STRIP OUTDOOR UNIT G G O W1 W1 W2 C C C Y1 Y1 Y1 R R R Y2 DS W2 G G O W1 W1 W2 C C C Y1 Y1 Y1 R R R D...

Page 46: ...at w bilities Capable of 2 stage gas heat control OFF CUT ON BOARD LINK W951 HEAT PUMP CUT ON BOARD LINK W915 2 STAGE COMPR DEHUM FURNACE TERM STRIP HEAT PUMP L7724U T STAT dual fuel capa dual fuel capa 67M41 H L Y2 D B L Y2 Y2 out blue Y2 DS G G Y1 Y1 Y1 O O O W1 W1 W1 W2 W2 R R R C C C 67M41 H L Y2 D B L Y2 DS G G Y1 Y1 Y1 O O O W1 W1 W1 W2 W2 R R R C C C Field Wiring Applications with Conventio...

Page 47: ...ities Capable of 2 stage gas heat midification OFF CUT ON BOARD LINK W914 DEHUM CUT ON BOARD LINK W951 HEAT PUMP CUT ON BOARD LINK W915 2 STAGE COMPR L7742U T STAT FURNACE TERM STRIP HEAT PUMP 67M41 H L Y2 D B L Y2 Y2 out blue dual fuel capa dual fuel capa control w dehu control w dehu Y2 C C C DS G G Y1 Y1 Y1 O O O W1 W1 W1 W2 W2 R R R 67M41 H L Y2 D B L Y2 DS G G Y1 Y1 Y1 O O O W1 W1 W1 W2 W2 R ...

Page 48: ...507581 04 Page 48 of 59 Issue 1933 Figure 66 ...

Page 49: ...47 0 70 765 181 650 150 550 124 385 90 180 51 0 80 715 187 615 159 500 127 325 94 135 52 Blower Performance A96UH2E045B12 Performance Less Filter External Static Pressure in w g Air Volume Watts at Various Blower Speeds High Medium High Medium Medium Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0 00 1345 340 1255 245 1150 185 895 105 845 95 0 10 1305 345 1225 250 1105 200 855 110 810 ...

Page 50: ...45 705 150 640 140 0 70 1145 380 1070 310 960 255 670 160 585 145 0 80 N A N A 1035 320 925 265 610 165 550 155 A96UH2E090C16 Performance Less Filter External Static Pressure in w g Air Volume Watts at Various Blower Speeds High Medium High Medium Medium Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0 00 1740 370 1505 250 1370 195 1285 160 1135 125 0 10 1695 390 1470 265 1325 205 1240 ...

Page 51: ...5 1765 335 1635 280 1435 200 2185 655 1915 440 1745 340 1620 275 1430 195 0 10 2170 660 1920 460 1715 350 1595 290 1380 205 2160 660 1880 460 1705 345 1570 285 1380 205 0 20 2130 680 1865 475 1670 370 1560 305 1345 220 2115 680 1835 470 1670 365 1535 305 1325 220 0 30 2095 700 1835 490 1640 390 1525 325 1285 230 2060 705 1795 495 1630 380 1505 320 1285 230 0 40 2065 720 1785 510 1600 405 1465 335 ...

Page 52: ... not attempt to manually light burners on this furnace Each time the thermostat calls for heat the burners will automatically light The ignitor does not get hot when there is no call for heat on these units Gas Valve Operation 1 STOP Read the safety information at the beginning of this section 2 Set the thermostat to the lowest setting Allowable Heating Speeds Model Low Fire Heating Speeds High Fi...

Page 53: ...he unit 11 Set the thermostat to desired setting NOTE When unit is initially started steps 1 through 11 may need to be repeated to purge air from gas line 12 If the appliance will not operate follow the instructions Turning Off Gas to Unit and call your service technician or gas supplier Figure 67 Turning Off Gas to Unit 1 Set the thermostat to the lowest setting 2 Turn off all electrical power to...

Page 54: ... 5 3 1 1 7 3 5 4 5 13 0 LP Propane 4 9 10 0 4 6 9 4 4 4 9 1 4 3 8 9 4 9 10 0 11 0 13 0 NOTE A natural to L P propane gas changeover kit is necessary to convert this unit Refer to the changeover kit installation instruction for the conversion procedure Table 18 Manifold and Supply Line Pressure 0 10 000 ft For proper furnace operation the minimum gas supply pressure is 4 5 w c and the maximum gas s...

Page 55: ...lame Rollout Switches Two These manually reset switches are located on the front of the burner box Pressure Switch The pressure switch is located in the heating compartment on the cold end header box This switch checks for proper combustion air inducer operation before allowing ignition trial The switch is factory set and must not be adjusted Temperature Rise After the furnace has been started and...

Page 56: ... combustion air pressure tubing from cold end header collector box 15 Mark and remove wires from pressure switch Remove pressure switch Keep tubing attached to pressure switch 16 Remove electrical junction box from the side of the furnace 17 Remove blower access panel 18 Mark and disconnect any remaining wiring to heating compartment components Disengage strain relief bushing and pull wiring and b...

Page 57: ...ing screws Burners are self aligning to center of clam shells 40 Reconnect gas supply line to gas valve 41 Reconnect flame rollout switch wires 42 Reconnect sensor wire and reconnect 2 pin plug from ignitor 43 Reconnect wires to gas valve 44 Replace the blower compartment access panel 45 Refer to instruction on verifying gas and electrical connections when reestablishing supplies 46 Follow lightin...

Page 58: ... equivalent service agency or gas supplier Cabinet Parts Upper Access Panel Blower Access Panel Top Cap Control Panel Parts Transformer Integrated Control Board Door Interlock Switch Blower Parts Blower Wheel Motor Motor Mounting Frame Motor Choke Blower Housing Cutoff Plate Heating Parts Flame Sensor Heat Exchanger Assembly Gas Manifold Combustion Air Inducer Gas Valve Main Burner Cluster Main Bu...

Page 59: ...nimum height of eight 8 feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS 4 INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not...

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