Daikin DCG Series Service Instructions Manual page 32

SYSTEM OPERATION
TYPICAL PROPANE PIPING
First Stage
Regulator
200 PSIG
Maximum
Although the unit itself cannot be installed in an
excavated or confined space, the gas piping may be
routed through such areas and we strongly
recommend that you contact your propane supplier
about installing a gas detecting warning device
that would alert you to a gas leak.
• 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.
An undetected gas leak will create a danger of
explosion or fire. If you suspect the presence of gas,
follow the instructions on page 9. Failure to do so
could result in serious personal injury or death.
PROPANE TANK SIZING (MINIMUM)
TANK SIZE REQUIRED IF LOWEST OUTDOOR
MAXIMUM GAS TEMPERATURE (AVG. FOR 24 HOURS) REACHES
NEEDED TO
32°F 20°F
VAPORIZE*
125K BTU/HR 115 115
(50 CFH) GAL GAL
250K BTU/HR 250 250
(100 CFH) GAL GAL
375K BTU/HR 300 400
(150 CFH) GAL GAL
500K BTU/HR 400 500
(200 CFH) GAL GAL
750K BTU/HR 750 1000
(300 CFH) GAL GAL
* AVERAGE RATE/HOUR WITHDRAWL IN 8 HOUR PERIOD
32
5 to 15 PSIG
(20 PSIG Max.)
Continuous
11" W.C.
Second Stage
Regulator
10°F 0°F -10°F -20°F
115 250 250 400
GAL GAL GAL GAL
250 400 500 1000
GAL GAL GAL GAL
500 500 1000 1500
GAL GAL GAL GAL
750 1000 1500 2000
GAL GAL GAL GAL
1500 2000 2500 4000
GAL GAL GAL GAL
PROPANE GAS PIPING CHARTS
Sizing Between First and Second Stage Regulator
Maximum Propane Capacities listed are based on 1 PSIG Pressure Drop at 10
PSIG Setting. Capacities in 1,000 BTU/HR
PIPE OR
TUBING
LENGTH,
FEET
3/8"
30 309
40 265
50 235
60 213
70 196
80 182
90 171
100 161
150 130
200 111
250 90
300 89
350 82
400 76
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/HR
PIPE OR
TUBING SIZE, O.D., TYPE L
TUBING
LENGTH,
FEET
3/8" 1/2"
10 49 110
20 34 76
30 27 61
40 23 52
50 20 46
60 19 42
80 16 36
100 14 32
125 12 28
150 11 26
-30°F
200 10 22
600
250 9 19
GAL
300 8 18
1500
350 7 16
GAL
400 7 15
2500
*DATA IN ACCORDANCE WITH NFPA PAMPHLET NO. 54
GAL
3500
GAL
5000
GAL
TUBING SIZE, O.D., TYPE L
1/2" 5/8" 3/4" 7/8"
700 1,303 2,205 3,394
599 1,115 1,887 2,904
531 988 1,672 2,574
481 896 1,515 2,332
446 824 1,394 2,146
412 767 1,297 1,996
386 719 1,217 1,873
365 679 1,149 1,769
293 546 923 1,421
251 467 790 1,216
222 414 700 1,078
201 378 634 976
185 345 584 898
172 321 543 836
NOMINAL PIPE SIZE,
SCHEDULE 40
5/8" 3/4" 7/8" 1/2" 3/4"
206 348 539 291 608
141 239 368 200 418
114 192 296 161 336
97 164 253 137 284
86 146 224 122 255
78 132 203 110 231
67 113 174 94 198
59 100 154 84 175
52 89 137 74 155
48 80 124 67 141
41 69 106 58 120
36 61 94 51 107
33 55 85 46 97
30 51 78 43 89
28 47 73 40 83
NOMINAL PIPE SIZE,
SCHEDULE 40
1/2" 3/4"
1,843 3,854
1,577 3,298
1,398 2,923
1,267 2,649
1,165 2,437
1,084 2,267
1,017 2,127
961 2,009
772 1,613
660 1,381
585 1,224
530 1,109
488 1,020
454 949
1" 1-1/4" 1-1/2"
1,146 2,353 3,525
788 1,617 2,423
632 1,299 1,946
541 1,111 1,665
480 985 1,476
436 892 1,337
372 764 1,144
330 677 1,014
292 600 899
265 544 815
227 465 697
201 412 618
182 374 560
167 344 515
156 320 479