Bosch FS 151 - Page 68

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Bosch Greenstar Applications Manual
Bosch Thermotechnology Corp.Data subject to change
Gas
Supply
A
B
C
System Return
System Supply
Boiler Return
Boiler Supply
Piping Section
Description Requirements
A
System Supply
Minimum length of 4 x pipe diameter based
on System header pipe size
B Closely Spaced Tees
Maximum distance of 4 x pipe diameter
(center-to-center) based on System header
pipe size
C System Return
Minimum length of 8 x pipe diameter based
on System header pipe
Boiler Input (btu/hr) Boiler Supply/Return pipe diameter
System Supply/Return Header pipe diameter*
57,000 1" 1"
79,000 1" 1"
100,000 1" 1.25"
131,000 1" 1.25"
151,000 1" 1.5"
System Header Pipe
*based on 2 – 4 ft/sec flow velocity.
system ¨T of 20°
system ¨T of 10°
1.25"
1.25"
1.5"
1.5"
2.0"
Appendix B: Primary/Secondary piping for Greenstar Wall Boiler