Zephyr ZNAE42CS Manual

OUTSIDE AIR

TO CENTRAL SYSTEM

RETURN AIR OR INTERIOR

WALL REGISTER 

DAMPER FLAP (Install in

vertical position shown.)

AIR FLOW

AIR FLOW

SET SCREW

Install the damper as shown. Make sure damper flap is in a verti-

cal position when closed and power is off. The set screw can be 

used to adjust the damper opening - thereby balancing the inside 

and outside air pressure when the range hood exhausts at high 

speed.

The pressure switch is designed to operate when the static 

pressure increases to 0.05” Ps or more. It may not operate at low

speeds since the pressure is below this limit.

More than one damper may be required to balance the system.

If  more  than  one  is  required  use  (1)  MUA006A,  MUA008A,  or

MUA010A  and  then  use  the  54060012  (6”),  54060013  (8”),  or

54060014 (10”) dampers as additional dampers.

For the probe & pressure switch to work effectively the roof or 

wall cap must have a spring loaded damper.