Heatiator NB3630M, NB4842M, NB4236MI, NB3933M B. Check Appliance Draft, Without, With doors, closed

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 flame producing match.

•Hold lit match at bottom edge of draft hood opening and observe flame/smoke per the figure.

Flame up-Acceptable Flame up-Acceptable

Flame in-Good Flame in-Good

Flame out-Bad	Flame out-Bad
Without￿	With doors￿
doors.	closed.

Figure 13.1 Checking Appliance Draft

30 Heatilator • Novus BV-Mesh • 4031-553 Rev F • 11/07