RT-SVX063E-EN
43
Figure 26.
Gas heat component dimensions
A
B
C D
Combustion
inlet rain shield
(40-75 ton only)
Gas pipe
entry with
grommet CPVC Drain
Heat access
(850 MBH shown)
Flue Vent
Note: See gas piping figures for NPT size
Tonnage
Heater
Size
A
B
C
D
20–30
250, 350 &
500 MBh
6.75
7.59
5.29
7.85
40–55
350 MBh
6.75
11.85
5.42
11.58
40–75
500 MBh
6.75
11.85
5.42
11.58
40–75
850 MBh
10.5
18.0
5.42
11.58
60–75
1200 MBh
10.5
13.35
5.42
11.58
Connecting the Gas Supply Line to the
Furnace Gas Train
Follow the steps below to complete the installation
between the supply gas line and the furnace. Refer to
the following figures, for the appropriate gas train
configuration.
1. Connect the supply gas piping using a “ground-
joint” type union to the furnace gas train and check
for leaks.
2. Adjust the inlet supply pressure to the
recommended 7" to 14" w.c. parameter for natural
gas (11" to 14" w.c. for propane).
3. Ensure that the piping is adequately supported to
avoid gas train stress.
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