York ZF036 Installation Manual

Also see for ZF036: Installation manual

826081-XIM-C-021414 Johnson Controls Unitary Products1. The vaporization rate depends on (a) the temperature ofthe liquid and (b) the “wetted surface” area of the containeror containers.2. The proper pressure regulation. (Two-stage regulation isrecommended from the standpoint of both cost andefficiency.)3. The pressure drop in the lines between regulators andbetween the second stage regulator and the appliance.Pipe size required will depend on the length of the pipe runand the total load of all appliances.Complete information regarding tank sizing for vaporization,recommended regulator settings, and pipe sizing is availablefrom most regulator manufacturers and L.P./propane gassuppliers.L.P./propane gas is an excellent solvent and special pipecompound must be used when assembling piping for this gasas it will quickly dissolve white lead or most standardcommercial compounds. Shellac base compounds such asRectorseal #5 are satisfactory for this type of gas.Check all connections for leaks when piping is com-pleted, using a soap solution. NEVER USE A FLAME.FIRE OR EXPLOSION HAZARDVent And Combustion Air HoodsThe vent hood and combustion air hood (with screens) areshipped attached to the blower housing in the blowercompartment. These hoods must be installed to assure properunit function. All hoods must be fastened to the outside of thegas heat access panel with the screws provided in the bag alsoattached to the blower housing.The screen for the combustion air intake hood is secured to theinside of the access panel opening with three fasteners and thescrews used for mounting the hood to the panel. The top flangeof this hood slips in under the top of the access panel openingwhen installing. Refer to Vent and Combustion Air Hood Figure6.The vent hood is installed by inserting the top flange of the hoodinto the slotted opening in the access panel and securing inplace.The products of combustion are discharged horizontallythrough this screened, hooded vent openings on the gas heataccess panel.Optional Economizer/Motorized Damper Rain HoodThe instruction for the optional economizer/motorized damperrain hood can be found in form 035-07364-000. Use theseinstructions when field assembling an economizer rain hoodonto a unit. The outdoor and return air dampers, the damperactuator, the damper linkage, the outdoor and return air dividerbaffles, and all the control sensors are factory mounted as partof the “Factory installed” economizer option.Optional Power Exhaust/Barometric Relief Damper AndRain HoodThe instructions for the power exhaust/barometric relief damperand rain hood can be found in form 530.18-N1.0V. The exhaustfan, all supporting brackets, angles, and the wiring are factoryinstalled as part of the power exhaust option.All of the components, including the dampers, hardware, andmounting instructions are shipped in a single package externalfrom the unit. The hood must be field assembled and installed.Power exhaust is only available as a field installed accessory.Figure 5: Bottom Supply Connection External Shut-OffFailure to follow the safety warning exactly couldresult in serious injury, death or property dam-age.Never test for gas leaks with an open flame. usea commercially available soap solution madespecifically for the detection of leaks to check allconnections. A fire or explosion may result caus-ing property damage, personal injury or loss oflife.Figure 6: Vent And Combustion Air Hood