Fuel Piping; Fuel Line Sizing; Gas Supply Piping - Installation - RBI IEW-199 Installation And Operation Instructions Manual

FUEL PIPING

5. FUEL PIPING
A. GENERAL
1. All fuel piping to the Infinite Energy boiler is to be in
accordance with local codes. In the absence of local
regulations refer to the National Fuel Gas Code, ANSI
Z223.1/NFPA 54.
2. Size and install fuel piping to provide a supply of gas
sufficient to meet the maximum demand of all
appliances supplied by the piping.
B. FUEL LINE SIZING
1. The required flow rate of gas fuel to the boiler can be
determined by the following.
( )
ft ³
/
Input Rate
hr
The gas heating value can be supplied by the gas supplier.
2. As an alternative, use Table 5.1 to determine the
required gas flow rate which uses typical heating values
for natural gas and liquefied petroleum (LP) gas.
3. Table 5.2 shows the maximum flow capacity of
several pipe sizes based on 0.3" of pressure drop.
a. The values shown are based on a gas specific
gravity of 0.60 (Typical for natural gas).
b. Multiply the capacities listed by the correction
factors listed for gas with a specific gravity other
than 0.60 to obtain the corrected capacity.
4. Size and install the fuel gas supply piping for no more
than 0.5 inches of water pressure drop between the
gas regulator and the boiler.
C. GAS SUPPLY PIPING - INSTALLATION
1. Do not install any piping directly in front of the boiler
or along either side. Always provide access to the
front cover and side panel openings.
2. Install a sediment trap as shown in Figure 5.1. Be sure
to allow clearance from the floor or other horizontal
surface for removal of the pipe cap.
WARNING
Use a pipe joint sealing compound that is resistant to
liquefied petroleum gas. A non-resistant compound
may lose sealing ability in the presence of this gas,
resulting in a gas leak. Gas leaks may potentially
cause an explosion or fire.
3. Install a ground joint union between the sediment trap
and the boiler to allow service to the appliance.
4. Install a service valve as shown in Figure 5.1 to allow
the gas supply to be interrupted for service.
5. Maintain a minimum distance of 10 feet (3048 mm)
between the gas pressure regulator and the boiler.
22
(
Btu
Boiler Input Rate
=
Gas Heating Value
(
Btu
Table 5.1: Required Fuel Input
Infinite Energy
Model
IEW-199
IEW-399
* Natural gas input rates are based on 1,000 Btu/ft
rates are based on 2,500 Btu/ft
Table 5.2: Pipe Capacity:
Maximum Capacity of pipe in cubic feet per hour (cubic meters
per hour) with a pressure drop of 0.3" of water (75 Pa).
Pipe
1/2" NPT
Length
Pipe
ft (m)
)
/
10 132
hr
(3.0) (3.7)
)
/
20 92
ft ³
(6.1) (2.6)
30 73
(9.1) (2.1)
40 63
(12.2) (1.8)
50 56
(15.2) (1.6)
60 50
(18.3) (1.4)
70 46
(21.3) (1.3)
80 43
(24.4) (1.2)
90 40
(27.4) (1.1)
100 38
(30.5) (1.1)
The values are based on a specific gravity of 0.60 (typical for
natural gas). See Table 4.3 for capacity correction factors for
gases with other specific gravities.
Specific Gravity
Correction Factor
Specific Gravity
Correction Factor
Specific Gravity
Correction Factor
6. Check all gas piping for leaks prior to placing the
boiler in operation. Use an approved gas detector,
non-corrosive leak detection fluid, or other leak
detection method. If leaks are found, turn off gas flow
and repair as necessary.
When checking for leaks, do not use matches,
candles, open flames or other methods that provide
an ignition source. This may ignite a gas leak
resulting in a fire or explosion.
7. Figure 5.1 shows the gas shutoff valve for the Infinite
Energy boiler. This valve is to be used in addition to the
gas service valve shown upstream of the sediment trap.
Required Input Rate*
Natural Gas ft 3 /hr LP Gas ft
(m 3 /hr)
199 (5.9)
399 (11.3)
3 .
1-1/4"
3/4" NPT 1" NPT
NPT
Pipe Pipe
Pipe
278 520 1,050
(7.9) (14.7) (29.7)
190 350 730
(5.4) (9.9) (20.7)
152 285 590
(4.3) (8.1) (16.7)
130 245 500
(3.7) (6.9) (14.2)
115 215 440
(3.3) (6.1) (12.5)
105 195 400
(3.0) (5.5) (11.3)
96 180 370
(2.7) (5.1) (10.5)
90 170 350
(2.5) (4.8) (9.9)
84 160 320
(2.4) (4.5) (9.1)
79 150 305
(2.2) (4.2) (8.6)
0.50 0.55 0.60 0.65
1.10 1.04 1.00 0.96
0.80 0.85 0.90 1.00
0.87 0.84 0.82 0.78
1.30 1.40 1.50 1.60
0.68 0.66 0.63 0.61
WARNING
3 /hr
(m 3 /hr)
84 (2.4)
166 (4.7)
3 , LP input
1-1/2"
NPT
Pipe
1,600
(45.3)
1,100
(31.1)
890
(25.2)
760
(21.5)
670
(19.0)
610
(17.3)
560
(15.9)
530
(15.0)
490
(13.9)
460
(13.0)
0.70 0.75
0.93 0.90
1.10 1.20
0.74 0.71
1.70 1.80
0.59 0.58