Évaluations - 3, GPA: 3.7 ( )

Fabricant : Lennox International Inc. Taille : 1.42 mb Nom Fichier : Langue d'enseignement:

The return air must not be drawn from a room where another gas appliance (ie,, a water heater) is installed. Even thoughthisfurnace draws its combustion air from outside of the structure, other gas appliances that share a utility room may not. When retum air is drawn from a room, a negative pressure is created in the room. If a gas appliance is operating in a room with negative pressure, the flueproducts can be pulled back down the vent pipe and into the room. This reverse flow of the flue gas may result in incomplete combustion and the formation of carbon monoxide gas. This toxic gas might then be distributed through the house by the furnace duct system. Pipe & _tttings S _.ifi_ti_ ] J :::%:::::::::::::::: ::: : :: All pipe,fittings,primerand solventcementmust conform withAmericanNationalStandard Instituteand the American Society for Testingand Materials (ANSI/ASTM) standards. The solvent shall be free flowing and contain no lumps, undissolved particles or any foreign matter that adversely affects the joint strength or chemical resistance of the cement. The cement shall show no gelation, stratification, or separation that cannot be removed by stining. Refer to table 2 for approved piping and fitting materials. TABLE 2 PIPING AND FITTINGS SPECIFICATIONS ASTM PIPE & FITrlNG MATERIAL SPECIFICATION Schedule 40 PVC (Pipe) D1785 Schedule 40 PVC (Cellular Core Pipe) F89t Schedule 40 PVC (Fittings) D2466 Schedule40 CPVC (Pipe) F441 Schedule 40 CPVC (Fittings) F438 SDR-21 PVC (Pipe) or SDR-26 PVC (Pipe) D2241 SDR-21 CPVC (Pipe) or SDR-26 CPVC (Pipe) F442 Schedule 40 ABS (Pipe) D1527 Schedule 40 ABS (Fittings) D2468 ABS-DWV (Drain Waste & Vent) (Pipe & Fittings) D2661 PVC-DWV (Drain Waste & Vent -D2665 Pipe & Fittings) A CAUTION Primers and solvents must meet ASTM specifications, PVC pdrnerisspecifiedin ASTM F 656. Use PVC solvent cement as specified in ASTM D 2564 and ABS solvent cement as specified in ASTM D 2235. Low temperature solvent cement is recommended. Metal or plastic strapping may be used for vent pipe hangers. Table 3 liststhe available exhaust termination kits. All Lennox vent terminations are PVC. Page 7 TABLE 3 TERMINATION KITS Lennox Part No. Kit LB# Description*Inches (ram) 1-1/2" (38) Concentric 60G77 LB-49107CE Termination Kit 3" (50,8) Low Pressure Drop 33K97 LB-87942 Concentric Term Kit 2" (50,8) Roof 15F75 LB-49107CC Termination Kit 2" (50.8) Well 22G44 LB-49107CD Assembly Termination Kit 15F74 LB_9107CB 2" (50.8) Walt Ring Kit 3" (76,2) Roof 44J41 LB-65678A Termination Kit 3" (76.2) Wall 44J40 LB-65701A Assembly TerminationKit 2" (50.8) Wall 30G28 WTK Termination ExtendedVent 2" (50.6) Wall Termination ExtensionRiser 30G79 WTKX When making ABS joints, pieces can be prepared with a cleaner. When joining ABS to PVC matedals, use PVC solvent cement. Refer to this procedure as specified in ASTM D3138. Canada Only -In some provinces, PVC primer must be purple in color, PVC solvent cement must be grey, ABS solvent cement must be yellow and PVC solvent cement used when joining ABS to PVC must be white. [l :: ::,::.:_::: : :: ::.::..: :.:::::::::: .::::::.::::::::::.:::::::::::::::: :;:. :::_::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::: :: :: ::.:] Pipe used for exhaust and intake lines should be sized according to table 4. Note that maximum lengthof vent pipe is for one run; either intake or exhaust. Maximum vent length given is not the total length of intake plus exhaust vents. Each 90° elbow is equivalent to 5 feet (1.52 m) of vent pipe. Two 45° elbows are equivalent to one 90° elbow. One 45° elbow is equal to 2.5 feet (.76 m) of vent pipe. If intake and exhaust piping runs are not equal in length and number of elbows, the larger diameter pipe must be used for both runs. NOTE -When a WTKX terminaUon kit (30G79) is installed as part of the intake and exhaust piping, add twelve feet to the equivalent length (the two 2 inch diameter 90° elbows end the 27 inch pipe in the kit). For 75 kBtuh units, connections are provided for 2 inch diameter venting which should satisfy most venting requirements. No transition pieces are provided or needed for 2 inch venting. TABLE 4 VENT PIPE SIZING TABLE FOR G32Q FURNACES MINIMUM DIAMETER OF INTAKE/EXHAUST PIPE Vent Pipe G32-76 G32-100 G32-125 Equivalent Length 75,000 100,000 125.000 Max. Feet (Meters) BTU BTU BTU 15 (4.57 m) 2"2" 2' 20 (6,10 m) 2" 2" 3" 25 (7.62 m) 2"2" 3" 30 (9.14 m) 2" 3" 3_ 40 (12.19 m) 2"3" 3" 50 (I 5.24 m) 2" 3" 3" 55 (16.76 m) 2"3" 3" 60 (18,29 m) 3"3" 3" 70 (21,34 rn) 3" 3" 3" 80 (24.38 m) 3"3" 3" 90 (27.43 m) 3" 3" 3" 100 (30.48 m) 3" 3" 3" 110 (33,53 m) 3" 3" 3" 120 (36.58 m) 3" 3" 3" 130 (39.62 m) 3" 3" - NOTE -Min. pipeforG32-75 is 5 feet and 2 elbowsof 2 inchdmmeterp_pe. NOTE -Min. pipe for G32-100 is 5 feet end 2 elbowsof 2 inch diameter pipe, NOTE -Min. pipe for G32-125 is 5 feetand 2e/bowsof2inchdiameter pipe. For -100 and -125 kBtuh units,the intakeconnectionis sized for 3inchdi...

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