Page 17
N
EO
T
HERM
Boilers and Water Heaters
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
SIZE
1/2” 3/4” 1” 1-1/4”
1-1/2” 2”
LENGTH
MAXIMUM CAPACITY IN THOUSANDS OF BTU PER HOUR
20 200 418 787 1616 2422 4664
40 137 287 541 1111 1664 3205
60 110 231 434 892 1337 2574
80 94 197 372 763 1144 2203
100 84 175 330 677 1014 1952
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 11.
Nominal Pipe Size @ 0.11” W.C. and 0.5” Press Drop
EQUIVALENT LENGTHS OF STRAIGHT PIPE FOR TYPICAL SCH 40 FITTINGS
NOMINAL PIPE SIZE
FITTING
1/2” 3/4” 1” 1-1/4”
1-1/2” 2”
LINEAR FEET
90° ELBOW
3.6 4.4 5.2 6.6 7.4 8.5
TEE
4.2 5.3 6.6 8.7 9.9 12
Table 8. Equivalent Lengths of Straight Pipe, SCH 40
SCH 40 METAL PIPE CAPACITY FOR 0.60 SPECIFIC GRAVITY NATURAL GAS
NOMINAL PIPE SIZE
@
0.30” W.C. PRESSURE DROP
LENGTH
1/2” 3/4” 1” 1-1/4”
1-1/2” 2”
FT
CUBIC FEET OF GAS PER HOUR
20 92 190 350 730 1100 2100
40 130 245 500 760 1450
60 105 195 400 610 1150
80 90 170 350 530 990
100
150 305 460 870
Table 9. Nominal Pipe Size @ 0.30” W.C. Press Drop
NEOTHERM
NATURAL GAS
REQUIRED
CU FT
SIZE
/ HR.
150 150
199/210 199/210
285 285
399 399
500 500
600 600
750 750
850 850
Table 7.
To Size Your Piping
TO SIZE PIPING:
Measure linear distance from meter outlet to last
boiler. Add total input of all boilers and divide
by 1000 to obtain cu ft / hr required. Add total
equivalent length of fittings used according to
Table 8. Align total length (pipe and fittings) on left
side column of Table 9 with highest cubic feet of
gas required.
Notes:
Consult and confirm with Applicable Fuel Gas
Code before beginning work. Verify gas inlet
pressure is between 4 and 13 in W.C. before
starting boiler.
Section 5 -
PUMP REQUIREMENTS
5.1 NeoTherm Boiler Flow and Head
Requirements
NORMAL WATER*
Flow H/L Temp
Flow H/L Temp
Size
gpm feet Rise °F
lpm
m
Rise °C
150
19 49 15
72 14.9 8
199
25 28 15
95 8.5 8
285
36 33 15
98 10.1 8
399
50 35 15
189 10.7 8
500
63 28 15
239 8.5 8
600
**
60 24 19
227 7.3 11
750
**
68 35 21
257 10.7 12
850
**
68 26 24
257 7.9 13
*
Maximum water hardness of 10 grains per gallon allowed.
**
See
SECTION 6B.7
for pump information.
Table 12. Water Heater Flow Data
5.2 NeoTherm Water Heater Flow and
Head Requirements
TEMPERATURE RISE IN °F
20°F
25°F
30°F
35°F
40°F
FLOW H/L FLOW H/L FLOW H/L FLOW H/L FLOW H/L
SIZE GPM FT GPM FT GPM FT GPM FT GPM FT
150 14.3 28.5 11.4 19 9.5 13.6 8.1 11.2 7.1 8.8
199/210
20 24.1 16 16.7 13.4 11.6 11.3 9 9.9 6.9
285 27 25.5 22 17.5 18 14 15 10.5 13 8
399 39 28 31 20 25 14.5 22 11 19 9
500 48 24 38 16 32 12 27 9 24 8
600 58 44 46 31 38 22 33 18 29 15
750 72 37 58 23 48 17 41 13 36 10
850 81 33 65 22 54 15 46 10 41 8
TEMPERATURE RISE IN °C
11°C 14°C 17°C 19°C 22°C
FLOW H/L FLOW H/L FLOW H/L FLOW H/L FLOW H/L
SIZE lpm m lpm m lpm m lpm m lpm m
150 54 8.7 43 5.8 36 4.1 31 3.4 27 2.7
199/210
76 7.3 61 5.1 51 3.5 43 2.7 37 2.1
285 102 7.8 83 5.3 68 4.3 57 3.2 49 2.4
399 148 8.5 117 6.1 95 4.4 83 3.4 72 2.7
500 182 7.3 144 4.9 121 3.7 102 2.7 91 2.4
600 220 13.4 174 9.4 144 6.7 125 5.5 110 4.6
750 273 11.3 220 7.0 182 5.2 155 4.0 136 3.0
850 307 10.1 246 6.7 204 4.6 174 3.0 155 2.4
Table 10. Water Flow Requirements
Summary of Contents for NTV
Page 4: ...LAARS Heating Systems...
Page 11: ...Page 7 NEOTHERM Boilers and Water Heaters...
Page 24: ...Page 20 LAARS Heating Systems Figure 16 Hydronic Piping Single Boiler Zoning with Circulators...
Page 84: ...Page 80 LAARS Heating Systems Parts Illustration 1 Jacket Components...
Page 86: ...Page 82 LAARS Heating Systems Parts Illustration 4 Internal Components Sizes 750 850...
Page 88: ...Page 84 LAARS Heating Systems Parts Illustration 6 Gas Train Components Sizes 600 850...
Page 91: ...Page 87 NEOTHERM Boilers and Water Heaters Notes...
