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Pennant
( 500-2000 )
Figure 12. Water Heater Piping — Multiple Heaters, Multiple Tanks.
GPM
S
N
H
SIZE
500
45
68
90
750
45
68
90
1000
45
68
90
1250
68
68
90
1500
68
68
90
1750
68
68
90
2000
112
112
112
NOTES:
1. S = soft water (1 to 7.5 grains hardness)
2. N = normal water (7.6 to 17 grains hardness)
3. H = hard water (more than 17 grains hardness)
4. gpm = gallons per minutes, lpm = liters per minute, ft = headless in feet, m = headloss in meters
5. Headloss is for heater's heat exchanger only
FT
TEMP RISE °F
S
N
H
S
1.8
2.3
3.5
19
13
2.1
3.0
6.0
28
19
2.3
3.6
6.1
38
25
3.8
3.8
6.3
31
31
3.9
3.9
6.5
38
38
4.0
4.0
6.7
44
44
10.0 10.0 10.0
30
30
Table 9. Water Flow Requirements – PNCV.
LPM
N
H
S
N
9
170
257
341
14
170
257
341
19
170
257
341
24
257
257
341
28
257
257
341
33
257
257
341
30
424
424
424
M
H
S
N
H
0.5
0.7
1.1
10
0.6
0.9
1.8
16
0.6
1.1
1.9
21
1.2
1.2
1.9
17
1.2
1.2
2.0
21
1.2
1.2
2.0
24
3.0
3.0
3.0
17
Page 23
TEMP RISE °C
S
N
H
7
5
10
8
14
10
17
13
21
16
24
18
17
17
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