Installation of the Propane Gas Orifice
1. Close the manual gas shut off valve to the appli-
ance.
2. Turn off the electrical power supply to the appliance.
3. Remove the front panel by flipping down the control
panel and loosening the two Phillips head mounting
screw(s) at the control panel. Pull bottom of front
panel forward to remove.
4. Disconnect the gas piping inside the CHALLENGER
enclosure at the brass union located above the gas
valve, and rotate piping towards the back of appli-
ance, see Fig. 1.
The gas orifice is installed in a O-ring gasket. This O-ring
gasket must be reinstalled when ever the gas orifice is
changed. Use care not to damage the O-ring gasket.
5. Separate the O-ring gasket from the natural gas ori-
fice and insert the appropriate brass propane orifice
from Table 1 into the O-ring gasket.
The CHALLENGER appliances contain a natural gas ori-
fice. This orifice must be removed prior to the installation
of the propane orifice.
Failure to retain the O-ring gasket on the gas orifice will cause an
improper seal between the gas valve and the union resulting in a
potential risk of a gas leak. Ensure unions at top and bottom of
gas valve are tight. Any potential gas leakage may result in
death, serious injury or substantial property damage.
Ensure the proper orifice for propane is installed as given in
Table 1. Failure to comply will affect input rate and combus-
tion efficiency of the appliance which may result in death,
serious injury or substantial property damage.
6. Install proper propane gas orifice/O-ring gasket
assembly on the top of the gas valve.
7. Reconnect the gas piping on top of gas valve and
tighten the brass union connections at the gas valve.
NOTICE
NOTICE
WARNING
WARNING
Gas Orifice
O-Ring Gasket
Gas
Piping
Union
Nut
Gas
Valve
CHALLENGER
Natural Gas to Propane Instructions
2
Fig. 1: CHALLENGER Gas Valve/Orifice
Assembly
Table 1: Propane Gas Orifice
CHALLENGER
MODEL
Propane Gas
Orifice Size
Orifice
Marking
CC50s
0.130” [3.30 mm]
330
CC85 or
CC85s
0.199” [5.05 mm]
505
CC105 or
CC105s
0.199” [5.05 mm]
505
CC125, CC125c or
CC125s
0.220” [5.60 mm]
-580-
CC125H or
CC125Hs
0.181” [4.60 mm]
460
CC150s
0.220” [5.60 mm]
-580-
