84
12.2 - Pipe sizing
for natural gas
Refer to Figure 12-2 for pipe length
and diameter. For additional gas
pipe sizing information, refer to ANSI
Z223.1 (or B149.1 for Canadian
installations).
Natural gas supply pressure
requirements
1. Pressure required at the gas valve
inlet pressure port:
• Maximum 13”W.C. with no
fl
ow
(lockup) or with heater off.
• Minimum 3”W.C. with gas
fl
owing
(verify during high
fi
re).
2. Install 100% lockup gas pressure
regulator in supply line if inlet
pressure can exceed 13”W.C. at
any time. Adjust lockup regulator
for 13”W.C. maximum.
12 - INSTALLATION - Gas supply
12.3 - Propane Gas
WARNING!!!
These heaters
are typically shipped ready
to fi re on natural gas. Check
heater rating plate to determine
which fuel the heater is set for.
If set to natural gas, it may be
converted to LP by following
instruction on Section 12.6 or
12.7. Failure to comply could
result in severe personal injury,
death, or substantial property
damage.
Pipe sizing for propane gas
Contact gas supplier to size pipes,
tanks, and 100% lockup gas pressure
regulator.
Propane supply pressure
requirements:
1. Adjust propane supply regulator
provided by the gas supplier for
13”W.C. maximum pressure.
2. Pressure required at gas valve inlet
pressure port:
• Maximum 13”W.C. with no
fl
ow
(lockup) or with heater off.
• Minimum 3”W.C. with gas
fl
owing
(verify during high
fi
re).
WARNING!!!
Ensure that
the high gas pressure regulator
is at least 6 - 10 ft upstream
of the appliance. Failure to
comply could result in severe
personal injury, death, or
substantial property damage.
Iron Pipe size (in)
Nominal:
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
Actual ID:
0.824
1.049
1.380
1.610
2.067
2.469
3.068
4.026
Length (ft)
Capacity in Cubic Feet of Gas per Hour
10
273
514
1060
1580
3050
4860
8580
17500
20
188
353
726
1090
2090
3340
5900
12000
30
151
284
583
873
1680
2680
4740
9660
40
N/A
243
499
747
1440
2290
4050
8270
50
N/A
215
442
662
1280
2030
3590
7330
60
N/A
195
400
600
1160
1840
3260
6640
70
N/A
179
368
552
1060
1690
3000
6110
80
N/A
167
343
514
989
1580
2790
5680
90
N/A
157
322
482
928
1480
2610
5330
100
N/A
148
304
455
877
1400
2470
5040
125
N/A
131
269
403
777
1240
2190
4460
150
N/A
119
244
366
704
1120
1980
4050
175
N/A
N/A
224
336
648
1030
1820
3720
200
N/A
N/A
209
313
602
960
1700
3460
250
N/A
N/A
185
277
534
851
1500
3070
NOTICE!
Maximum pipe capacity is based on a 0.60 speci
fi
c gravity gas at a pressure of 0.5 PSIG and a
0.3”WC pressure drop
Figure 12-2 Gas pipe capacity for natural gas
Содержание Boiler
Страница 3: ...3 SAFETY INSTRUCTIONS ...
Страница 5: ...5 SAFETY INSTRUCTIONS ...
Страница 56: ...56 10 INSTALLATION Electrical connections Figure 10 4 Electrical customer connection for IB boilers ...
Страница 122: ...122 15 MAINTENANCE ...
Страница 126: ...126 17 SPARE PARTS Spare parts ...
Страница 129: ...129 17 SPARE PARTS 50 48 50 49 53 56 57 55 54 58 47 52 48 52 51 55 52 020010 03 006 199 ...
Страница 152: ...20 SEQUENCE OF OPERATION for BOILER ...
Страница 153: ...21 SEQUENCE OF OPERATION for WATER HEATER ...