Install/Operation - Thermal Products Inc

Trinity │Installation and Operation InstructionsTft SeriesVent/Air-inlet Pipe Length DeterminationUse Table 4-5 to determine the maximum pipe length that can be used. The table calculates 90º elbows, and 45ºelbows at 5 equivalent feet each.Example: When using 3” pipe, a Tft60-110 can be installed with 150 equivalent feet of air-inlet piping and 150equivalent feet of exhaust-vent piping. See Table 4-5 for more details.When operating on Propane, models Tft60-110 require a minimum vent/air-inlet length of6’ and 11’ for 2” and 3” venting respectfully.Table 4-5 Allowable Vent and Air-inlet Pipe Size and LengthsPipeLengthNumber of Elbows (90’s or 45’s) and Equivalent FeetModel No.GasSize(ft) 1 2 3 4 5 6 7 8 9Tft60-110 NG 100 95 90 85 80 75 70 65 60 55Tft60-85 2” 1 35 30 25 20 15 10 5 - - -LPTft11025 20 15 10 5 - - - - -Tft60-110 150 145 140 135 130 125 120 115 110 1053”Tft155-250NG/LP 100 95 90 85 80 75 70 65 60 55Tft300-399 4”Note:1 See WARNING below.100 95 90 85 80 75 70 65 60 55PVC Exhaust Venting – When using 2” PVC venting with models Tft60-110, the firstseven (7) equivalent feet of exhaust venting must be approved 2” CPVC or 3” PVC; seeexceptions in Table 4-4 and Figures 4-2b and 4-2d.16