Design and Installation Guide - CT.gov

Section 3: System Configuration
40
August 2010
SIZING RUN “B”
Run “B” is sized by the load of the supplied appliance and the section length
The load of the furnace is 80CFH
The section length to the furnace is 15ft
Referring to Table 7-19 (Pressure drop for Gastite ® CSST): for a 80CFH load, 1/2" CSST has a drop of 0.035"WC / ft.
The pressure drop over Run “B” is: 0.035" x 15ft = 0.525"WC
The available pressure at the end of run “B” is 6.055"WC - 0.525"WC = 5.530"WC
SIZING RUN “C”
Run “C” is sized by the load of the supplied appliance and the section length
The load of the water heater is 36CFH
The section length is 10ft
Referring to Table 7-19 (Pressure drop for Gastite ® CSST): for a 40CFH load, 3/8" CSST has a drop of 0.075"WC / ft.
The pressure drop over Run “C” is: 0.075" x 10ft = 0.750"WC
The available pressure at the end of run “C” is 6.055"WC - 0.750"WC = 5.305"WC
SIZING RUN “D”
Run “D” is sized by the load of the supplied appliance and the section length
The load of the range is 52CFH
The section length is 20ft
Referring to Table 7-19 (Pressure drop for Gastite ® CSST): for a 60CFH load, 1/2" CSST has a drop of 0.020"WC / ft.
The pressure drop over Run “D” is: 0.020" x 20ft = 0.400"WC
The available pressure at the end of run “D” is 6.055"WC - 0.400"WC = 5.655"WC
SIZING RUN “E”
Run “E” is sized by the total load of all supplied appliances and the section length
The total load of the BBQ and the dryer is 25 + 28 = 53CFH
The section length is 20ft
Referring to Table 7-19 (Pressure drop for Gastite ® CSST): for a 60CFH load, 1/2" CSST has a drop of 0.020"WC / ft.
The pressure drop over Run “E” is: 0.020" x 20ft = 0.400"WC
The available pressure at the end of run “E” is 6.055"WC - 0.400"WC = 5.655"WC
SIZING RUN “F”
Run “F” is sized by the load of the supplied appliance and the section length
The load of the dryer is 28CFH
The section length 5ft
Referring to Table 7-19 (Pressure drop for Gastite ® CSST): for a 30CFH load, 3/8" CSST has a drop of 0.044"WC / ft.
The pressure drop over Run “F” is: 0.044" x 5ft = 0.220"WC
The available pressure at the end of run “F” is 5.655"WC - 0.220"WC = 5.435"WC
SIZING RUN “G”
Run “G” is sized by the total load of the supplied appliance and the section length
The load of the BBQ is 25CFH
The section length 5ft
Referring to Table 7-19 (Pressure drop for Gastite ® CSST): for a 30CFH load, 3/8" CSST has a drop of 0.044"WC / ft.
The pressure drop over Run “G” is: 0.044" x 5ft = 0.220"WC
The available pressure at the end of run “G” is 5.655"WC - 0.220"WC = 5.435"WC
Gastite Division
603 Hendee Street / Springfield, MA 01104
800.662.0208 / www.gastite.com / gastite@gastite.com