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LGH/LCH420, 480, 540, 600
GAS VALVE
CAP
MANUAL MAIN
SHUT-OFF VALVE
FIGURE 14
PRESSURE TEST GAS LINE
CAUTION
Some soaps used for leak detection are corrosive to
certain metals. Carefully rinse piping thoroughly
after leak test has been completed. Do not use
matches, candles, flame or othe sources of ignition
to check for gas leaks.
WARNING
Danger of explosion. Can cause injury
or product or property damage. Do not
use matches, candles, flame or other
sources of ignition to check for leaks.
Flue and Intake Hoods
Hoods are shipped in the gas heat section. Install as shown
in figure 15. Secure with screws provided.
Two grommets are also shipped with the hood assemblies
for gas piping knockouts. Install one grommet in the gas
piping entry knockout. Install the other grommet in the heat
section division panel knockout.
FIGURE 15
INSTALL EXHAUST AND INTAKE HOODS
REMOVE AND DISCARD
SHIPPING COVERS OVER
EXHAUST OPENINGS
EXHAUST
HOODS
INTAKE
HOOD
High Altitude Derate
Locate the high altitude conversion sticker in the unit
literature bag. Fill out the conversion sticker and affix next to
the unit nameplate.
Refer to table 1 for high altitude adjustments.
TABLE 1
HIGH ALTITUDE DERATE
Altitude Ft.* Gas Manifold Pressure
2000-4500 See Unit Nameplate
4500 And Above Derate 4% / 1000 Ft. Above Sea Level
*Units installed at 0-2000 feet do not need to be modified.
NOTE ‐ This is the only permissible derate for these units.
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