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Page 14
NOTE: The shut-off gas cock must be installed outside of the
unit and should meet the specifications of all applicable national
and local codes.
2. Install a ground union joint downstream of the shut-off cock.
This joint must also be installed outside of the unit.
3. Install a drip leg at least six (6) inches in depth next to the union
as shown in Figure 14. This drip leg is required to collect any
sediment that may be deposited in the line.
4. Before connecting the piping circuit to the unit, bleed the air
from the supply line. Then cap or plug the line and test the
pressure at the tapped shut-off cock. The pressure reading
should not exceed 14 inches water column.
5. Using an appropriate backup wrench on the gas valve inlet
boss, connect the gas piping to the unit. Check the completed
piping for leaks using a soap and water solution or the equiva-
lent.
6. After installation of the gas pipe in the unit, the pipe chase
opening should be closed with the filler/barrier plug provided.
MANIFOLD PRESSURE
Check the manifold pressure at the unit gas valve. Do not exceed
the recommended pressure shown on the unit nameplate.
GAS PIPING INSTALLATION
BURNER & VALVE ILLUSTRATION
FLUE AND HOOD ILLUSTRATION
y
t
C66439
9
MANIFOLD
COVER
2ND STAGE
ADJUSTMENT
3/32" ALLEN
BRACKET-BURNE
R
HOLD DOWN
BURNER
ORFICE
SCREW
1ST STAGE
ADJUSTMENT
3/32" ALLEN
SCREW
BRACKET
BURNER
SUPPORT
C664400
GAS VALVE
ALTERNATE
MANUAL
"ON/OFF"
SWITCH
FUSE LINK