Amana GUX-X Installation Instructions Manual page 17

TANKS AND PIPING - PROPANE GAS UNITS
WARNING
To prevent death, personal injury or
property damage due to fire or explosion
caused by a propane gas leak, install a gas
detecting warning device. Since rust can
reduce the level of odorant in propane gas,
a gas detecting warning device is the only
reliable way to detect a propane gas leak.
Contact a local propane gas supplier about
installing a gas detecting warning device.
All propane gas equipment must conform to the safety
standards of the National Board of Fire Underwriters (See
NBFU Manual 58).
For satisfactory operation, propane gas pressure must be
10 inch W.C. at the furnace manifold with all gas appli-
ances in operation. Maintaining proper gas pressure de-
pends on three main factors:
1. Vaporization rate, depending on temperature of the
liquid, and "wetted surface" area of the container or
containers.
2. Proper pressure regulation. Two-stage regulation is
recommended for both cost and efficiency.
3. Pressure drop in lines between regulators, and be-
tween second stage regulator and the appliance. Pipe
size will depend on length of pipe run and total load of
all appliances.
Complete information regarding tank sizing for vaporiza-
tion, recommended regulator settings, and pipe sizing is
available from most regulator manufacturers and propane
gas suppliers.
Since propane gas will quickly dissolve white lead or most
standard commercial compounds, special pipe dope must
be used. Shellac base compounds resistant to the actions
of liquefied petroleum gases such as Gasolac, Stalactic,
Clyde's or John Crane are satisfactory.
Refer to Figure 19 for typical propane gas installations.
Figure 19
Propane Gas Installations (Typ.)
PROPANE GAS PIPING CHARTS
Sizing Between First and Second Stage Regulator
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
Pipe or
Tubing Tubing Size, O.D. Type L
Length, 3/8" 1/2"
Feet
10 730 1,700
20 500 1,100
30 400 920
40 370 850
50 330 770
60 300 700
80 260 610
100 220 540
125 200 490
150 190 430
175 170 400
200 160 380
To convert to capacities at 15 psig settings - multiply by 1.130
To convert to capacities at 5 psig settings - multiply by 0.879
Sizing Between Single or Second Stage Regulator and Appliance*
Maximum Propane Capacities Listed are Based on 1/2" W.C. pressure drop at 11" W.C. setting.
Capacities in 1,000 BTU/hour.
Pipe or
Tubing Tubing Size, O.D. Type L
Length, 3/8" 1/2" 5/8"
Feet
10 39 92 199
20 26 62 131
30 21 50 107
40 19 41 90
50 18 37 79
60 16 35 72
80 13 29 62
100 11 26 55
125 10 24 48
150 9 21 43
200 8 19 39
250 8 17 36
*Data in accordance with NFPA pamphlet NO. 54
WARNING
To prevent death, serious personal injury
or property damage due to fire or explosion
caused by a propane gas leak, install a gas
detecting warning device.
If the propane gas furnace is installed in a
basement, an excavated area or a confined
space, a warning device is required due to:
• Propane gas is heavier than air and any
leaking gas can settle in any low areas
or confined spaces.
• Propane gas odorant may fade, making
the gas undetectable except with a
warning device.
If the presence of gas is suspected, follow
the instructions on Page 2 of this manual.
17
Nominal Pipe Size
Schedule 40
5/8" 3/4" 7/8" 1/2"
3,200 5,300 8,300 3,200
2,200 3,700 5,800 2,200
2,000 2,900 4,700 1,800
1,700 2,700 4,100 1,600
1,500 2,400 3,700 1,500
1,300 2,200 3,300 1,300
1,200 1,900 2,900 1,200
1,000 1,700 2,600 1,000
900 1,400 2,300 900
830 1,300 2,100 830
780 1,200 1,900 770
730 1,100 1,800 720
Nominal Pipe Size
Schedule 40
3/4" 7/8" 1-1/8" 1/2" 3/4" 1"
329 501 935 275 567 1,071 2,205 3,307
216 346 630 189 393 732
181 277 500 152 315 590
145 233 427 129 267 504
131 198 376 114 237 448
121 187 340 103 217 409
104 155 289 89 185 346
90 138 255 78 162 307
81 122 224 69 146 275
72 109 202 63 132 252
66 100 187 54 112 209
60 93 172 48 100 185
3/4"
7,500
4,200
4,000
3,700
3,400
3,100
2,600
2,300
2,100
1,900
1,700
1,500
1-1/4" 1-1/2"
1,496 2,299
1,212 1,858
1,039 1,559
913 1,417
834 1,275
724 1,066
630 976
567 866
511 787
439 665
390 590