York ZF 180 Series Installation Manual

Also see for ZF 180 Series: Technical guide Installation manual Instruction manual Technical guide Installation manual

Contents

1061903-XIM-A-071320 Johnson Controls Unitary ProductsOptional Gas HeatThese gas-fired heaters have aluminized-steel or optionalstainless steel, tubular heat exchangers with spark ignition withproven pilot.Gas PipingProper sizing of gas piping depends on the cubic feet per hourof gas flow required, specific gravity of the gas and the length ofrun. “National Fuel Gas Code” Z223.1 (in U.S.A.) or the currentGas Installation Codes CSA-B149.1 (in Canada) should befollowed in all cases unless superseded by local codes or gasutility requirements. Refer to the Pipe Sizing Table 13. Theheating value of the gas may differ with locality. The valueshould be checked with the local gas utility.NOTE: There may be a local gas utility requirement specifyinga minimum diameter for gas piping. All units require aone-inch pipe connection at the entrance fitting.Figure 16: External Supply Connection External Shut-OffFigure 17: Bottom Supply Connection External Shut-OffNOTE: Maximum capacity of pipe in cubic feet of gas per hourbased upon a pressure drop of 0.3 inch W.C. and 0.6specific gravity gas.Table 13: Gas Application DataUnit Input(MBH) Output (MBH) Temp Rise(°F)Size Opt.180 24 300 240 20-5032 400 320 30-60240 24 300 240 20-5032 400 320 30-60Drip LegMainManualShut-offValveTable 14: Gas Pipe Sizing - Capacity of PipeLength ofPipe ft. (m)Nominal Iron Pipe Size1 in. 1-1/4 in.10 (3) 520 (14.7) 1050 (29.7)20 (6) 350 (9.9) 730 (20.6)30 (9.1) 285 (8) 590 (16.7)40 (12.1) 245 (6.9) 500 (14.1)50 (15.2) 215 (6) 440 (12.4)60 (18.2) 195 (5.5) 400 (12.4)70 (21.3) 180 (5) 370 (10.4)80 (24.3) 170 (4.8) 350 (9.9)90 (27.4) 160 (4.5) 320 (9)100 (30.4) 150 (4.2) 305 (8.6)Table 15: Gas Heat Minimum Supply Air ImperialSize(Tons) Heat SizeSupply Air (CFM)Cooling HeatingMin Max Min Max180(15)24 4500 7000 4500 700032 4500 7000 4500 7000240(20)24 6000 9400 6000 940032 6000 9400 6000 9400Table 16: Gas Heat Minimum Supply Air MetricSize(Tons) Heat SizeSupply Air (M 3 /S)Cooling HeatingMin Max Min Max180(15)24 2.13 3.3 2.13 3.332 2.13 3.3 2.13 3.3240(20)24 2.83 4.44 2.83 4.4432 2.83 4.44 2.83 4.44Drip LegMainManualShut-offValve