36
B o i l e r
Model
Delta 20 °F
Delta 25 °F
Delta 30 °F
Delta 35 °F
Delta 40 °F
Delta 45 °F
Delta 50 °F
Delta 55 °F
Req.
GPM
Head
Loss
(ft)
Req.
GPM
Head
Loss
(ft)
Req.
GPM
Head
Loss
(ft)
Req.
GPM
Head
Loss
(ft)
Req.
GPM
Head
Loss
(ft)
Req.
GPM
Head
Loss
(ft)
Req.
GPM
Head
Loss
(ft)
1
Req.
GPM
Head
Loss
(ft)
BFIT 1000
97
11
78
6.7
65
5.2
55
4.1
49
3.8
43
3.8
40
2.5
35
2.0
BFIT 1250 121
16
97
11
81
7.2
69
6.1
61
5.2
54
3.8
50
3
44
2.8
BFIT 1500
146
17
116
10.5
97
8.4
83
6
73
5
65
4.2
60
3.4
53
3.0
BFIT 2000
194
19
155
13.4
129
10
111
8.3
97
6.7
86
5
80
4.2
71
4.0
Notes
: Required Flow =
Output*1000/(500*ΔT)
, where flow rate is in GPM, output is in MBH, and ΔT is in °F. Outputs for specific boiler
models are provided in Table 1. Using boiler antifreeze will result in increased fluid density and may require larger circulators.
1
Absolute minimum flow rate.
Figure 14: Boiler Head Loss
IX. Hydronic Piping
(continued)
Table 13: Temperature Rise
0
5
10
15
20
25
40
65
90
115
140
165
W
at
er
P
re
ss
ur
e
lo
ss
es
s
(f
t
-
he
ad)
Water Flow Rate (gal/min)
Boiler Head-
Loss
AMP 1000/1250
AMP 1500
AMP 2000
D. Temperature Rise and Heat Exchanger Head Loss
1. The BFIT heat exchanger add pressure drop
which must be accounted in your system
design.
2. For systems with glycol mixture, the flow
rate specified in Table 13 will increase as
specified in Table 14 due to the extra frictional
loss introduced by the glycol. Size pump
accordingly.
3. Strictly follow glycol manufacturer’s guidelines
and recommendations when adding glycol in
the heating system.
1
System Glycol
Concentration (%)
Increase Flow,
GPM (%)
50
24
30
14
1
Total system water volume includes expansion
tank
(
s
)
and reservoirs.
Table 14: Increase Flow For Glycol System
Summary of Contents for BFIT 1000
Page 9: ...9 Figure 1 BFIT MODEL 1000 2000 ...
Page 12: ...12 IV BFIT Component Identification continued Figure 2 Component Identification ...
Page 13: ...13 IV BFIT Component Identification continued Figure 3 Component Identification ...
Page 52: ...52 Figure 24 Operating Instructions XII System Start up continued ...
Page 66: ...66 APPENDIX D INLET OUTLET WATER AND FLUE OUTLET TEMPERATURE SENSOR RESISTANCE VOLTAGE CHART ...
Page 68: ...68 ...
