Modine Manufacturing MRL Series Installation And Service Manual page 23

MRL Series
Figure 3.15 • Recommended Hardware
In Canada, infrared heater shall only be
connected with a Type I hose connector that
is (a) certified as being in compliance with
the Standard for Elastomeric Composite
Hose and Hose Couplings for Conducting
Propane and Natural Gas, CAN/CGA 8.1 ; and
(b) of a length of 36 ± 6 in (90 ± 15 cm).
1/2" x 24" 304 Stainless Steel Gas
Connector formed into smooth C-shape
Chart 3.4 • Maximum Capacity for Schedule 40 Metallic pipe, in CFH
1/2"
Pipe
Length
Nat Prop
10 feet 132 86
20 feet 92 60
30 feet 73 48
40 feet 63 41
50 feet 56 37
60 feet 50 33
70 feet 46 30
80 feet 43 28
90 feet 40 26
100 feet 38 25
125 feet 34 22
150 feet 31 20
175 feet 28 18
200 feet 26 17
The MRL Series heater is equipped to receive a gas supply line nipple of ½" NPT Schedule 40 metallic
pipe. All piping must be installed in accordance with the requirements outlined in the National Fuel Gas
Code ANSI/Z223.1 (latest edition) or CSA-B149.1. Support all gas supply piping with pipe hangers, metal
strapping, or other suitable material. Do not rely on the heater to support the gas pipe.
• Manual Shut Off and Sediment Trap
Shut Off
3/4" 1"
Nat Prop Nat
278 182 520
190 124 350
152 99 285
130 85 245
115 75 215
105 69 195
96 63 180
90 59 170
84 55 160
79 52 150
72 47 130
64 42 120
59 39 110
55 36 100
23
3.0 Installation • Gas Supply Installation Instructions
Flow of Gas
Sediment
Trap
1 1/4"
Prop Nat Prop
340 1050 686
229 730 477
186 590 386
160 500 327
141 440 288
127 400 261
118 370 242
111 350 229
105 320 209
98 305 199
85 275 180
78 250 163
72 225 147
65 210 137
1/8" NPT Test Connection
(Plugged)
Ground Joint
Union
3" Minimum
1 1/2" 2"
Nat Prop Nat
1600 1046 3050
1100 719 2100
890 582 1650
760 497 1450
670 438 1270
610 399 1150
560 366 1050
530 346 990
490 320 930
460 301 870
410 268 780
380 248 710
350 229 650
320 209 610
Prop
1993
1373
1078
948
830
752
686
647
608
569
510
464
425
399