Rheem Raypak AVIA 264 - Igniter, Burner, and Blower Service

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Orice Removal
1. Locate and close the external manual shutoff valve.
2. Loosen the external gas union.
3. Locate and remove jacket top.
4. Locate and remove the four (4) bolts & nuts holding
the gas orifice in place. See Figure 64.
5. Carefully remove the gas orifice and do not misplace
the O-rings attached to the flanges.
6. Inspect and/or replace the orifice with the correct
size.
GAS ORIFICE
BRACKET
O-RING
Figure 64. Orice Location
Gas Orice Selection
Use Table R for the right gas orice selection. Propane
orices can be identied by the black paint on the edges.
The notches should face up for easy identication.
The gas orice is located on the gas train, between the gas
valve and the combustion blower.
NOTE: Gas orices for propane gas have a black oxide
nish.
Figure 65. Gas Orice
Pockets /
Notches
Model Gas Type Finish
1 264
Natural None
2 404
1 264
Propane Black
2 404
Table R. Gas Orice Selection
Igniter Removal.
1. Remove top cover.
2. Disconnect spark cable from igniter.
3. Use M10 socket, remove the two nuts holding the
igniter.
4. Carefully remove igniter and gasket.
5. When replacing igniter, be sure to add a new gasket
when installing igniter.
.15 +/- .01
Figure 66. Igniter
Burner Removal
1. See “Combustion Blower Removal” steps below.
Must remove blower to reach the burner.
2. Once the blower is removed. Use an M10 socket to
remove (16) nuts holding down the burner.
3. Be sure to install a new gasket before installing the
burner.