Generac Power Systems G007144, Руководство по установке

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Fuel Conversion / Gas Connections
Installation Guidelines For 50 Hz Air-Cooled Generator Sets 25
Natural Gas Pipe Sizing
To determine correct NG pipe size, find the kVA rating of
the generator set in the left column, and trace to the right.
The number to the right is maximum length (measured in
m / ft) allowed for the pipe sizes on top. Pipe sizes are
measured by trade size diameter to include any fittings,
valves (must be full flow), elbows, tees, or angles. NOTE: See Table B.3.2 in NFPA 54 or Table A.2.2 in the
ICC IFGC, Equivalent Lengths of Pipe Fittings and
Valves for the correct values to be added to overall fuel
piping length. Tables based on schedule 40 black pipe. If
installing any other piping system, follow the pipe sizing
charts for the selected piping system.
LP Gas Pipe Sizing
To determine correct LP gas pipe size, find the kVA rating
of the generator set in the left column, and trace to the
right. The number to the right is maximum length (mea-
sured in m / ft) allowed for the pipe sizes on top. The pipe
sizes are measured by trade size diameter to include any
fittings, valves (must be full flow), elbows, tees, or angles.
See Table B.3.2 in NFPA 54 or Table A.2.2 in the ICC
IFGC, Equivalent Lengths of Pipe Fittings and Valves for
the correct values to be added to overall fuel piping
length. NOTE: Pipe sizes are from the outlet of the second
stage regulator to the fuel shutoff valve. Table is based
on schedule 40 black pipe. If installing any other piping
system, follow the pipe size charts for the selected piping
system.
NOTE: Recommended minimum LP gas tank size is 946
L (250 gal). Contact LP provider to correctly size LP tank
to generator. Vertical tanks, which are measured in kilo-
grams (or pounds), are permitted if correctly sized for the
generator set. Do not connect generator to a 20 or 30 lbs
LP tank.
Table 5-1. NG Pipe Sizing
Pipe Size
(mm/in)
For 1.24–1.74 kPa
(5–7 in of water column)
For 0.87–1.24 kPa
(3.5–5 in of water column)
Allowable Pipe Distances (m / ft)
19 / 0.75 25 / 1 32 / 1.25 38 / 1.5 25 / 1 32 / 1.25 38 / 1.5
8 kVA 6.1 / 20 25.91 / 85 112.78 / 370 243.84 / 800 9.14 / 30 38.1 / 125 60.96 / 200
10 kVA 3.05 / 10 15.24 / 50 74.68 / 245 166.12 / 545 6.1 / 20 24.38 / 80 53.34 / 175
13 kVA — 12.19 / 40 57.91 / 190 129.54 / 425 3.05 / 10 18.29 / 60 38.1 / 125
Table 5-2. LP Gas Pipe Sizing
Pipe Size (mm / in)
For 2.49–2.99 kPa
(10–12 in of water column)
Allowable Pipe Distances (m / ft)
19 / 0.75 25 / 1 32 / 1.25
8 kVA 21.33 / 70 77.72 / 255 304.8 / 1000
10 kVA 13.72 / 45 51.82 / 170 210.31 / 690
13 kVA 7.62 / 25 39.62 / 130 164.59 / 540