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CHECKLIST—DIRECT VENT (2-PIPE) INSTALLATION
LOAD CALCULATION
____________ Heating Load (Btuh)
____________ Cooling Load (Btuh)
____________ Furnace Model Selection
COMBUSTION AIR AND VENT PIPING
Termination Location
____________ Roof or Sidewall
____________ Termination Kit --- 2 Pipe or Concentric
____________ Combustion-Air Pipe Length
____________ Combustion-Air Pipe Elbow Quantity
____________ Vent Pipe Length
____________ Vent Pipe Elbow Quantity
____________ Pipe Diameter Determined from Sizing Table
____________ Pipe Sloped To Furnace
Pipe Insulation
____________ Over Ceilings ________
____________ Low-Ambient Exposed Pipes
Condensate Drain
____________ Unit Level or Pitched Forward
____________ Internal Tubing Connections Free of
Kinks and Traps
____________ External Drain Connection
Leak Tight a nd Sloped
____________ Condensate Trap Primed before Start-Up
____________ Heat Tape Installed if Required
CHECKLIST -- START-UP
____________ Gas Input Rate
(Set Within 2 percent of Rating Plate)
____________ Temperature Rise Adjusted
Thermostat Anticipator
____________ Anticipator Setting Adjusted or
____________ Cycle Rate (3 Cycles per Hr) Selected
Safety Controls Check Operation
____________ Primary Limit
____________ Pressure Switch
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