Pump Requirements; Brute Boiler Flow And Head Requirements; Brute Water Heater Flow And Head Requirements - Bradford White Brute BNTH Installation And Operation Instructions Manual

Page 16
Brute
NATURAL GAS
REQUIRED
CU FT
SIZE / HR. TO SIZE PIPING:
Measure linear distance from meter outlet to last
150 150
boiler. Add total input of all boilers and divide
by 1000 to obtain cu ft / hr required. Add total
199/210 199/210
equivalent length of fittings used according to
285 285 Table 6B. Align total length (pipe and fittings) on
left side column of Table 6C with highest cubic
399 399
feet of gas required.
500 500
Notes:
600 600 Consult and confirm with Applicable Fuel Gas
Code before beginning work. Verify gas inlet
750 750
pressure is between 4 and 13 in W.C. before
starting boiler.
850 850
Table 5.
EQUIVALENT LENGTHS OF STRAIGHT PIPE FOR TYPICAL SCH 40 FITTINGS
NOMINAL PIPE SIZE
1/2" 3/4"
FITTING
LINEAR FEET
3.6 4.4
90° ELBOW
4.2 5.3
TEE
Table 6. Equivalent Lengths of Straight Pipe, SCH 40
SCH 40 METAL PIPE CAPACITY FOR 0.60 SPECIFIC GRAVITY NATURAL GAS
NOMINAL PIPE SIZE
1/2" 3/4"
LENGTH
FT CUBIC FEET OF GAS PER HOUR
20 92 190
40 130
60 105
80 90
100
Table 7. Nominal Pipe Size @ 0.30" W.C. Press Drop
SCHED 40 METAL PIPE CAPACITY FOR 1.50 SPECIFIC GRAVITY
UNDILUTED PROPANE
NOMINAL PIPE SIZE 11" W.C. INLET AND 0.5" W.C. PRESSURE DROP
@
1/2" 3/4"
SIZE
LENGTH MAXIMUM CAPACITY IN THOUSANDS OF BTU PER HOUR
20 200 418
40 137 287
60 110 231
80 94 197
100 84 175
NOTES:
1. Follow all local and national LP gas codes for line sizing and equipment
requirements.
2. Verify that inlet gas pressure remains between 4 and 13 inches of water
column before and during operation.
Source: ANSI Z223.1-80 National Fuel Gas Code.
Table 9. Nominal Pipe Size @ 0.11" W.C. and 0.5" Press Drop
1" 1-1/4" 1-1/2"
5.2 6.6 7.4
6.6 8.7 9.9
0.30" W.C. PRESSURE DROP
@
1" 1-1/4" 1-1/2"
350 730 1100
245 500 760
195 400 610
170 350 530
150 305 460
1" 1-1/4" 1-1/2"
787 1616 2422
541 1111 1664
434 892 1337
372 763 1144
330 677 1014
Section 5 -

PUMP REQUIREMENTS

5.1 Brute Boiler Flow and Head
Requirements
20°F
FLOW H/L
SIZE GPM FT
150 14.3 28.5
20 24.1
199/210
285 27 25.5
399 39 28
500 48 24
600 58 44
750 72 37
850 81 33
2"
8.5 11°C
12
FLOW H/L
SIZE lpm m
150 54 8.7
76 7.3
199/210
285 102 7.8
2"
399 148 8.5
500 182 7.3
2100
600 220 13.4
1450
750 273 11.3
1150
850 307 10.1
990
870
Table 8. Water Flow Requirements
5.2 Brute Water Heater Flow and Head
Requirements
Flow
2"
Size gpm
4664
150 19
199 25
3205
285 36
2574
50
399
2203
63
500
1952
60
600**
750** 68
850** 68
* Maximum water hardness of 10 grains per gallon allowed.
** See section 6B.7 on page 27 for pump information.
Table 10. Water Heater Flow Data
B
RADFORD
TEMPERATURE RISE IN °F
25°F 30°F 35°F
FLOW H/L FLOW H/L FLOW H/L
GPM FT GPM FT GPM
11.4 19 9.5 13.6 8.1 11.2
16 16.7 13.4 11.6 11.3
22 17.5 18 14 15 10.5
31 20 25 14.5 22
38 16 32 12 27
46 31 38 22 33
58 23 48 17 41
65 22 54 15 46
TEMPERATURE RISE IN °C
14°C 17°C 19°C
FLOW H/L FLOW H/L FLOW H/L
lpm m lpm m lpm
43 5.8 36 4.1 31
61 5.1 51 3.5 43
83 5.3 68 4.3 57
117 6.1 95 4.4 83
144 4.9 121 3.7 102 2.7
174 9.4 144 6.7 125 5.5
220 7.0 182 5.2 155 4.0
246 6.7 204 4.6 174 3.0
NORMAL WATER*
H/L Temp Flow
feet Rise °F lpm
49 15 72
28 15 95
33 15 98
35 15
189
28 15
239
24 19
227
35 21
257
26 24 257
W
HITE
40°F
FLOW H/L
FT GPM FT
7.1 8.8
9 9.9 6.9
13 8
11 19 9
9 24 8
18 29 15
13 36 10
10 41 8
22°C
FLOW H/L
m lpm m
3.4 27 2.7
2.7 37 2.1
3.2 49 2.4
3.4 72 2.7
91 2.4
110 4.6
136 3.0
155 2.4
H/L Temp
m Rise °C
14.9 8
8.5 8
10.1 8
10.7 8
8.5 8
7.3 11
10.7 12
7.9 13