Detroit Radiant Products Company LS3 Series - Manual (Page 38)

38
LS3 Series
Leak Testing
Use a soap solution or equivalent for leak testing. Leak testing solution must be non-corrosive, and be
rinsed off immediately after the leak test. Never test for leak with an open flame. Failure to comply could
result in personal injury, property damage or death.
Always leak test final gas assembly for gas leaks according to the procedures outlined in NFPA 54 and
all local codes and/or Standards.
For leak testing on pressures below 1/2 PSI
Before leak testing, close the field installed manual shut off valve shown on Figure 3.24 on the supply
line to isolate the gas valve from the pressure.
NOTE: All factory installed gas connections have passed
an approved leak test.
For leak testing on pressures above 1/2 PSI
When leak testing with pressures above 1/2 PSI (14 inches W.C.), the unit must be isolated from the
supply pipe. Close the field installed manual shut off valve, disconnect the supply line to the unit, and
temporarily cap the supply line for testing purposes.
WARNING
!
Gas pressures to the appliance controls must never exceed 14 inches W.C. (1/2 PSI).
Supply pressures greater than 14” W.C. can damage the controls, resulting in personal
injury, property damage, or death.
WARNING
!
Testing for gas leaks with an open flame or other sources of ignition may lead
to a fire or explosion and cause serious injury or death. Test in accordance
with NFPA or local codes.
3.0 Installation • Leak Testing
Chart 3.9 • Maximum capacity for Schedule 40 Metallic pipe, in CFH
Pipe
Length
1/2” 3/4” 1” 1-1/4” 1-1/2” 2”
Nat Prop Nat Prop Nat Prop Nat Prop Nat Prop Nat Prop
10 feet 132 86 278 182 520 340 1050 686 1600 1046 3050 1993
20 feet 92 60 190 124 350 229 730 477 1100 719 2100 1373
30 feet 73 48 152 99 285 186 590 386 890 582 1650 1078
40 feet 63 41 130 85 245 160 500 327 760 497 1450 948
50 feet 56 37 115 75 215 141 440 288 670 438 1270 830
60 feet 50 33 105 69 195 127 400 261 610 399 1150 752
70 feet 46 30 96 63 180 118 370 242 560 366 1050 686
80 feet 43 28 90 59 170 111 350 229 530 346 990 647
90 feet 40 26 84 55 160 105 320 209 490 320 930 608
100 feet 38 25 79 52 150 98 305 199 460 301 870 569
125 feet 34 22 72 47 130 85 275 180 410 268 780 510
150 feet 31 20 64 42 120 78 250 163 380 248 710 464
175 feet 28 18 59 39 110 72 225 147 350 229 650 425
200 feet 26 17 55 36 100 65 210 137 320 209 610 399