Timer Removal & Replacement - Heatilator C40 Owner's Manual

• After re-installing the timer assembly through the
fi rebox access door, re-attach the timer assembly to
the air chamber cover using a Phillips head screw
driver. See Figure 4.19.
• Attach the linkage upper arm to the lower linkage
arm.
Figure 4.20 Timer Box Installed
7. Timer Removal & Replacement
• Loosen set screw on timer, remove two screws and
remove timer. See Figure 4.21.
Remove
2 screws
Loosen Set Screw
Figure 4.21 Timer
24
Remove Timer
Heatilator • Constitution Owner's Manual • 480-2330 • Rev B 1-29-13
• Install new timer using same two screws. It is very
important that the D cut side of the timer shaft is
facing the opposite side of the linkage timer arm.
See Figure 4.22.
D cut side of timer shaft must face
away from the Linkage Timer Arm
Figure 4.22 D Cut on Shaft
• Place linkage control arm over timer shaft and tighten
set screw, Figure 4.23.
Tighten set screw
Figure 4.23 Linkage Control Arm Installed
• Rotate linkage control arm into fi nal position and
re-attach to mounting plate. Note that the D cut is now
facing the linkage timer arm. Re-attach the linkage
timer arm, Figure 4.23.
• Retun to Timer Assembly Replacement, Section
4.B.6.