Modine Manufacturing IPT Installation And Service Manual page 15

INSTALLATION
7. When pressure/leak testing pressures above
14" W.C. (1/2 psi), close the field installed shut-off valve,
disconnect the unit, and its combination gas control from the
gas supply line, and plug the supply line before testing. When
testing pressures 14" W.C. (1/2 psi) or below, close the
manual shut-off valve on the unit before testing.
8. If the gas valve was rotated to change control access side,
leak test fittings
Figure 15.1 - Recommended Sediment Trap/
Manual Shut-Off Valve Installation
GAS
SUPPLY LINE
GAS
SUPPLY LINE
3"
MIN.
SEDIMENT
TRAP
Table 15.1 - 3/4" x 36" Flexible GasConnector Pressure
Drop ("W.C.)
Input MBH
50
60
75
100
150
175
200
Table 15.2 - Gas Pipe Capacities
Length
Of Pipe 1/2"
(feet) Natural Propane
10 132 83
20 92 58
30 73 46
40 63 40
50 56 35
60 50 32
70 46 29
80 43 27
90 40 25
100 38 24
125 34 21
150 31 20
GROUND
JOINT
UNION
W/ BRASS
SEAT
MANUAL GAS
SHUT-OFF VALVE
TO
CONTROLS
PLUGGED
1/8" NPT TEST
GAGE CONNECTION
Gas Type
Natural Propane
0.03 0.02
0.04 0.02
0.05 0.03
0.08 0.04
0.14 0.07
0.18 0.09
0.23 0.11
Gas Pipe Capacities (Up to 14" W.C. Gas Pressure through Schedule 40 Pipe)
Cubic Feet per Hour with Pressure Drop of 0.3" W.C.
Natural Gas - Specific Gravity - 0.60
Propane Gas - Specific Gravity - 1.50
3/4"
Natural Propane Natural
278 175 520
190 120 350
152 96 285
130 82 245
115 72 215
105 66 195
96 60 180
90 57 170
84 53 160
79 50 150
72 45 130
64 40 120
Figure 15.2 - Recommended Installation of Flexible
Gas Connector
Alternate Supply Locations
should be maintained on a
12" radius arc
Burner Box
(End View)
Warning: Connector must be installed in a
only a 36" long connector of 3/4" nominal ID with this heater. This is
offered as a factory supplied, field installed accessory.
Pipe Diameter
1" 1-1/4"
Propane Natural Propane
328 1050 662
221 730 460
180 590 372
154 500 315
135 440 277
123 400 252
113 370 233
107 350 221
101 320 202
95 305 192
82 275 173
76 250 158
9-511
Field Supplied Gas Piping
Note: The gas supply nipple
must be parallel to the
heater movement.
12"
2"
Burner Box
(Side View)
configuration. Use
1-1/2"
Natural Propane Natural
1600 1008 3050
1100 693 2100
890 561 1650
760 479 1450
670 422 1270
610 384 1150
560 353 1050
530 334 990
490 309 930
460 290 870
410 258 780
380 239 710
2"
Propane
1922
1323
1040
914
800
725
662
624
586
548
491
447
15