7.Using an Allen wrench, turn the screw clockwise to increase or counterclockwise to decrease high fire manifold pressure
8.Install the spring, weight and aluminum cap
9.For low fire adjustment, tighten the aluminum cap to increase and loosen to decrease low fire mani- fold pressure.
10.Install
11.Repeat steps 3 to 10 until correct manifold pres- sures are obtained.
12.Secure
Gas Valve Removal
1.Remove burner tray. See Burner Tray Removal procedure.
2.Disconnect, pilot tubing from gas valve.
3.Turn vertical gas pipe from manifold slightly and unscrew gas valve.
4.Reverse above procedure to
Main Burner and Orifice Removal
1.Remove burner tray. See Burner Tray Removal procedure.
2.Remove pilot. See Pilot Removal procedure.
3.Remove (8) total screws from the
4.Remove (8) total screws from the left and right sides of the manifold assembly. Detach the mani- fold assembly from the burner tray assembly.
5.Remove burners by raising the bracket on the back end of the burners up and out of their slots.
6.Use a long ½” socket wrench to remove orifices from the gas manifold.
7.Remove burners by raising the bracket on the back end of the burners up and out of their slots.
8.Reverse above procedure to
Pilot Removal
1.Disconnect pilot tubing from gas valve.
2.Remove (4) screws from control box. Open the control box.
3.Remove the pilot wire from the ignition wire.
4.Remove (2) screws that mount the pilot bracket to the air manifold assembly.
Fig. 48: IID Pilot
5.Pull the pilot bracket slightly, then drop and pull downwards and outwards.
6.Reverse above procedure to
FOR HEATERS
MADE IN OR AFTER
AUGUST 2001
Fig. 49: Pilot Removal
Combustion Fan Removal
1.Remove burner tray. See Burner Tray Removal procedure.
2.Remove (4) screws that mount the combustion blower to the manifold assembly.
3.Reverse above procedure to
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