Vent Pipe Sizing Worksheet; Start−Up & Performance Check List - Lennox G51MP SERIES Installation Instructions Manual

Vent Pipe Sizing Worksheet

Step 1 Proposed vent pipe size : ______
Step 2 Termination kit catalog number : _____________
Vent pipe equivalency value from table 5 : ______
Step 3 Total number of 90° elbows required (indoors and outdoors)
______ X 5 = ______ equivalent feet of pipe
Step 4 Total number of 45° elbows required (indoors and outdoors)
______ X 2.5 = ______ equivalent feet of pipe
Step 5 Linear feet of straight pipe required : ______
Add equivalent feet of vent pipe listed in
Step 6
steps 2 through 5.
If the total is equal to, or less than, the allowable maximum given in table 7, 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.
G51MP Start−Up & Performance Check List
Job Name
Job Location
Installer
Unit Model No.
Serial No.
Heating Section
Electrical Connections Tight?
Supply Voltage
Blower Motor Amps
Fuel Type: Natural Gas?
Furnace Btu Input
Line Pressure
Regulator Pressure
Flue Connections Tight?
Condensate Connections Tight?
Combustion Gas Tested?
Fan Control Setting
(45 Seconds Fixed On)
Fan Control Off Setting
Filter Clean & Secure?
Thermostat
Calibrated?
Job No.
City
City
Technician
LP/Propane Gas?
w.c. − Nat.:
CO
CO
2
Heat Anticipator Properly Set?
Page 53
Blower Motor H.P.
Gas Piping Connections
Tight & Leak−Tested?
w.c. − LP/Propane
Proper Draft?
Temperature Rise
Vent Clear?
Equivalent Feet
TOTAL
Date
State
State
Level?