Cleaver-Brooks CBW - Circulation Chart; Continuous Flow through the Boiler

CHAPTER2
THE PRESSURE VESSEL
8cH..,
Boner
System T..,pe,.ture Crap- De9,... F
S!a
Ou•t
10 1
20
30
I
40 50
10
70
"'
10
100
{1000)
(BHP)
Btu/Hr
Muimum =n:uiattnv Rllte - GPM
15
500
100 1
50
33
25
20
17
,.
12 11 10
20 670
13-4 I
61
•s
33
27
221
19
11 1
15
13
30
1.005
2001
100
67
50
4&0j
33
29
251
22
20
4&0
1,340
25a I
13-4
89
61
I
So4l
45
38 33
30
27
so
1,675
3351
HS8 I
112 1
&4
67
sol
.aj
42 I 37
33
60
2.010
4021
201
134
101 !
sol
67 sa
sol
45 40
70
2.34!
•1o 1
235j
157 1
11e I
941
1a 1
57
s9 1
52
47
80 2.580
5361 2sa 1
179 1
134
I
101 1
901
nj
stl
60
5:4
100
3..150 I
67o 1
3351
223
168
13-4 ,2,
961
841
75 1
67
125
•.18.5 I
8361
-'18 1
2791
209
I
168 I 1.-o I 120 I 1os I
931
&4
150
s.02S
1 1.oos I
503 335j
251
201 1 1sa 1 ,...,. 1 126
112
1 100
200
I
6.695
1.340
I
67o 1
4o&7
335
I
268 I 22• I 192 I 168 I 1•e I 134
2SO
a.370 1 1 .s1s I
8381
ssal
<419
I
3351280
24&0 1 210 1 186
167
I
300
'
1o,045 \ 2.o1o 1 , .oos I
67o I
S03
I
402 I ns I 2a1 I 251 I 223 I 201
3SO
11.120 1 2..35o 1 1.11s 1
78A I
587
·I
•10 I 392 I 338
294 I 251
2:35
40)
I 13,AOO I 2.680 I 1.340 I
895 610
535 I ~7 I 383 33512981258
5CXl
16.740 1 3.350 1 1.67s 1 1.120
838
I
670 ! ssa I •79 I •1e I 312
33.5
600
. 20.080
•.020 I 2..01 o
1,340 ' 1.005
sos ! 67o I 575 r sa2 I 4.&8
4.02
700 23.430
•.aso I 2..3<45
1.565 1 1. 175
I
s.o 1 1a.s 1 67o I sas
.520 1 47o
800
26.780
s.3eo I 2.680
1,785
1.340
1.075
J 895 1 1ss 1 sto
595
S3S
[FIGURE 2·1 I CIRCULATION CHART]
CAUTION!
The circulating pump should be
interlocked with the burner so
that the burner cannot operate
unless the circulating pump is
running to avoid damage to the
equipment.
When individual zone circulating pumps are
used, it is
recommended that they be kept running
-
even though the heat users do not require hot
water.
The relief device or by-pass valve thus will
750-150
allow continuous circulation through the boiler
and will help prevent rapid replacement
of boiler
water
with "cold" zone water.
Continuous Flow Through the Boiler - The
. system should be piped and the controls so ar-
ranged that there will be water circulation
through the boiler under all operating conditions.
The operation of three-way valves and system
controls
should be checked to make sure that the
boiler will not
be by-passed. Constant circulation
through the boiler eliminates the possibility
of
stratification within the unit and results in more
even water temperatures to the system.
CHAPTER 2...3