Operation and Installation Manual

27
Figure 18 - Combustion Air and Vent Piping - Boiler Connections
COMBUSTION AIR AND VENT PIPE
2” (50.8mm) Diameter Vent And Combustion
Air Intake Piping
- 21 ft (6.4m)maximum total equivalent length
for 90-100 models
-26 ft (7.9m) maximum total equivalent length
for 90-50 and -90-75 models
- 2 ft (0.6m) minimum total equivalent length
for all models
TRANSITION FITTING
2” (50.8mm) ⊘ to 3” (76.2mm)
⊘ IN VERTICAL RUN
3” (76.2mm) Diameter Vent And Combustion
Air Intake Piping
- 92 ft (28m) maximum total equivalent length
for 90-100 models
- 15 ft (4.6m) minimum total equivalent length
for 90-100 models
- 112 ft (34m) maximum total equivalent
length for 90-50 and 90-75 models
- 20 ft. (6m) minimum total equivalent length
for 90-50 and 90-75 models
SAFETY RELIEF
VALVE SEE
PAGE 18 FOR
REQUIREMENTS
3”
SAFETY RELIEF
VALVE SEE
PAGE 18 FOR
REQUIREMENTS