INSTALLATION INSTRUCTIONS - Lennox

Vent Pipe Sizing Worksheet
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Proposed vent pipe size : ______
Termination kit catalog number : _____________
Vent pipe equivalency value from table 3 : ______
Total number of 90° elbows required (indoors and outdoors)
______ X 5 = ______ equivalent feet of pipe
Total number of 45° elbows required (indoors and outdoors)
______ X 2.5 = ______ equivalent feet of pipe
Linear feet of straight pipe required : ______
Add equivalent feet of vent pipe listed in
steps 2 through 5.
Equivalent Feet
TOTAL
If the total is equal to, or less than, the allowable maximum given in table 5, the proposed pipe size is acceptable. If the
total exceeds the maximum allowed vent pipe length, repeat the process above using the next larger diameter pipe until
an acceptable total is achieved.
NOTE − In Direct Vent systems, total the equivalent length of either the exhaust OR intake piping run, depending upon which
will be LONGER. Intake and exhaust pipe diameter must be the same size and must be terminated in the same pressure
zone. Intake and exhaust pipe should be roughly the same length.
G43UF Start−Up & Performance Check List
Job Name
Job Location
Installer
Unit Model No.
Serial No.
Job No.
City
City
Technician
Heating Section
Electrical Connections Tight?
Supply Voltage
Blower Motor H.P.
Blower Motor Amps
Gas Piping Connections
Tight & Leak−Tested?
Fuel Type: Natural Gas?
LP/Propane Gas?
Furnace Btu Input
Line Pressure
Regulator Pressure w.c. − Nat.:
w.c. − LP/Propane
Flue Connections Tight?
Proper Draft?
Condensate Connections Tight?
Combustion Gas Tested?
Fan Control Setting
CO 2 CO
(45 Seconds Fixed On)
Fan Control Off Setting
Temperature Rise
Filter Clean & Secure?
Vent Clear?
Thermostat
Calibrated? Heat Anticipator Properly Set? Level?
Date
State
State
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