Owner's manual

Model 702G/O Advanced gas/oil burners — Instruction manual
Carlin part number MN702GO Rev. 06/23/14
– 13 –
Where appliance instructions differ from this manual, follow the appliance instructions.
NATURAL GAS
Capacities in Cubic feet per hour
for Schedule 40 metal pipe
Pipe size
(inches)
Total length of gas piping,
from meter to burner connection (feet)
20 40 60 80 100
Natural gas @ .60 specific gravity, pressure drop 0.3 in. w.c. (note 1)
1¼ 730 500 400 350 305
1½ 1,100 760 610 530 460
2 2,100 1,450 1,150 990 870
2½ 3,300 2,300 1,850 1,600 1,400
Natural gas @ .60 specific gravity, pressure drop 0.5 in. w.c. (note 1)
1¼ 950 660 530 460 400
1½ 1,460 990 810 690 620
2 2,750 1,900 1,520 1,300 1,150
2½ 4,350 3,000 2,400 2,050 1,850
Note 1 For natural gas with specific gravity other than 0.60,
consult National Fuel Gas Code for correction factor.
PROPANE GAS
Capacities in Btuh for
Schedule 40 metal pipe
Propane gas @ 1.5 specific gravity, pressure drop 1 psi
½ 1,839 1,264 1,015 869 770
¾ 3,845 2,643 2,122 1,816 1,610
1 7, 2 4 3 4.978 3,998 3,422 3,033
Propane gas @ 1.5 specific gravity, pressure drop 0.5 in. w.c.
1 787 541 434 372 330
1¼ 1,616 1 , 111 892 677 543
1½ 2,422 1.664 1,337 1 , 114 1,014
Table 3 Capacities of black iron pipe, cubic feet gas/hour Figure 8 Gas train pressure drop
3. Install gas piping (continued)
Regulator spring:
 Thestandardmaingaspressureregulatorspring(seeitem8,Figure7,page12)
isplated.Therangeisfrom3.0to6.0incheswatercolumn.
 The1"RV61regulatorisavailablewithanoptionalbluespring,witharangeof
5.0to12.0incheswatercolumn.
 The1¼"or1½"RV81regulatorisavailablewiththestandardplatedspring(3.0
to6.0incheswatercolumn)oravioletspring,witharangeof4.0to12.0inches
watercolumn.