Webster SC Series - Gas Systems

Page 16 Fuel SystemsSC Manual
2. Gas Systems
Illustrated Gas Trains by Capacity and Code: The following illustrations show the Webster conguration for
UL, FM and IRI as grouped by UL capacity ratings. Refer to the legend below for component part identication.
These illustrations are not to be used for eld erection and/or system design purposes.
UL-FM Modulation Gas Piping Diagram - Up To 2,500 MBH Firing Rate
722166
To 2,500,000 Modulating
Modulating
Modulating
Modulating
Modulating
Modulating
Modulating
M
M
M
M
M
M
M
722166
722167
722168
722169
722170
722171
722172
X
X
X
X
X
X
X
UL Modulation Gas Piping Diagram - 2,500 To 5,000 MBH Firing Rate
722167
UL Capacity Range
BTU/Hr.
Operation Mode Webster
Designation
Code Illustration
UL FM
2,500,001
to 5,000,000
X
5,000,001
to 12,500,000
12,500,001
and Up