Form: 2435
Revision: 9
Free Flex Installation and Operation Manual
Date: 9-1-2017
Bryan Steam LLC, 783 N Chili Ave, Peru IN 46970
Web:
www.
bryanboilers
.com
Phone:
765-473-6651
Fax:
765-473-3074
Email:
25
It is recommended that a water meter be
installed in the make-up water system to the
boiler system. Scheduled recording of the
water meter register will show an indication of
a potential slow system leak in addition to
providing insight into any system problems.
Also, make-up water as well as water for the
initial system fill should be provided through
a water softener. Additionally, chemical
treatment of the system water is advisable.
Contact a qualified boiler water chemical
treatment company for their
recommendations. See section 3.8 for more
information.
See Appendix G for boiler water flow
pressure drop data and Appendix F for typical
boiler piping arrangements.
3.5.4.1
Water Flow Rates (Variable Primary
Pumping Systems)
Variable primary pumping systems shall be
capable of delivering no less than the
minimum and no more than the maximum
specified in Table 8 and Table 9 for each
boiler connected in the system.
Model
Minimum Flow Rate
gpm
Δ
P
(ft)
High Fire
Δ
T
FF1000
19
.51
100F
FF1500
29
.37
100F
FF2000
38
.65
100F
FF2500
48
.8
100F
FF3000
57
1.15
100F
Table 8 Minimum Water Flow Rates for
Variable Primary Pumping
Model
Maximum Flow Rate
gpm
Δ
P
(ft)
High Fire
Δ
T
FF1000
95
12.7
20F
FF1500
143
9.2
20F
FF2000
190
16.3
20F
FF2500
238
20
20F
FF3000
285
28.7
20F
Table 9 Maximum Water Flow Rates for
Variable Primary Pumping
WARNING
Do not use Table 8 or Table 9 to size a
constant volume pump.
3.5.4.2
Water Flow Rates (Primary /
Secondary Systems)
Each boiler connected to a secondary loop of
a primary / secondary pumping system shall
have a constant volume pump sized in
accordance with Table 10 or Table 11.