Heatilator • RBV4236/RBV4842 • 4048-210 Rev K • 02/07 31
B. Check Appliance Draft
Check draft of appliance to verify proper venting conditions.
• Close all windows and doors, turn on all exhaust fans in
home.
• Appliance is to be completely assembled to normal
operating condition.
• Turn on appliance and allow to operate for at least 10
minutes.
• Check draft as shown in Figure 13.1. This can be done
using a smoke or fl ame producing match.
• Hold lit match at bottom edge of draft hood opening and
observe fl ame/smoke per the fi gure.

Without

doors.

With doors

closed.

Flame up-Acceptable
Flame in-Good
Flame out-Bad
Flame up-Acceptable
Flame in-Good
Flame out-Bad
Figure 13.1 Checking Appliance Draft
C. High Limit Safety Switch
A high limit switch has been installed on this appliance. This
switch automatically turns off the appliance if it becomes too
hot. If this happens, do not attempt to operate the appliance
until it has been examined by a qualifi ed service technician.
For the high limit switch location, see Figures 13.2-13.3.
Figure 13.2 Remove the Hood
Figure 13.4 Limit Switch Location