GB312 Applications Manual
6.6 Pipe Sizing
For piping details, see Section 6.1
6.6.1 Three Boiler recommended Near Boiler Piping Size
"C"
Pump
PK
Three
GB312 System (18°F Delta T) Recommended Near Boiler Piping Size
Models
GB312/90
Pipe A
2½"
Pipe B
2"
Pipe C
1½"
Header E
2½"
Three
GB312 System (36°F Delta T) Recommended Near Boiler Piping Size
Models
GB312/90
Pipe A
2"
Pipe B
1½"
Pipe C
1¼"
Header E
2"
See Sections 10.1 and 10.2, Tables 17 to 20 for Boiler pump
(PK) and LLHeader (Hydro-Seperator) selections.
Logano plus GB312 applications manual | 04.2008
"C"
"B"
Pump
PK
GB312/120
GB312/160
GB312/200
3"
4"
4"
2½"
3"
3"
2"
2½"
2½"
3"
4"
4"
GB312/120
GB312/160
GB312/200
2½"
2½"
3"
2"
2"
2½"
1½"
1½"
2"
2½"
2½"
3"
"A"
"B"
"A"
Pump
PK
Table 16
GB312/240
GB312/280
4"
4"
4"
4"
2½"
3"
4"
4"
Table 17
GB312/240
GB312/280
3"
4"
2½"
3"
2"
2½"
3"
4"
Technical specifi cations are subject to change without prior notice
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