Air King AIK26YL Section, Shaft, “Y” Transition, Ducting, Installing Optional Balancing Damper

	Housing	NOTE: Units that include only one collar do not utilize the “Y”
	Joist	transition. Follow the same instructions as in step 1, except
		connect the one end of the ducting directly to the fan.
		2.	Connect one end of the ducting to the top of the “Y” transition
			and the other end to the intake of the fan (Figure 11).
Ceiling		3. Connect one end of the ducting to the exhaust of the fan and
			the other end to a wall or ceiling cap. (Figure 11). Always
			duct the fan to the outside through a wall or roof cap.
Figure 10	Housing Grill Collar	NOTE: When using insulated flexible duct, it is recommended that
		the inner vinyl core be screw clamped or taped to the inlet and
SECTION 6		outlet and that the vapor barrier surrounding the insulation be
		taped to the fan housing.
Ducting		NOTE: When attaching flex duct to the collar/damper combination
CAUTION: ALL DUCTING MUST COMPLY WITH LOCAL AND
		and an immediate elbow is necessary, be certain that the elbow is
NATIONAL BUILDING CODES.		installed with a "soft" bend to allow damper blades to operate properly.

NOTE: Insulated ducting is required for bathroom exhaust applications,
where ducting passes through unconditioned space or where noise	SECTION 7
is a factor. Failure to use insulation could result in excessive
condensation buildup within the duct, and undesirable sound levels	Installing Optional Balancing Damper
within the room. Duct runs should have as few bends as possible.	Some kits include an optional balancing damper to allow for
NOTE: Flexible insulated ducting may be used where allowed by local	adjustment of the system. The damper may be used where the
	grills will be connected using branches of unequal length or
code. For the quietest possible installations, it is recommended a
	where the flow will need to be balanced for any reason. To Install
minimum of 8' of insulated flexduct be used between any exhaust grill
	the optional damper:
and fan. When using flexible type duct work, duct should be stretched
as tight and straight as possible. Failure to do so could result in	1.	The damper must be installed on the branch with the least
dramatic loss of system performance. Flexible duct should be
		restriction. This is generally the duct that is shortest or has
connected to the fan with screw clamps or duct tape. All connections
		the fewest bends.
should be as airtight as possible to maximize system performance.
	2.	Drill a 5/16" hole approximately 1-1/2" from the edge on the
1. Connect one end of the ducting (not included) to the room
		flat side of the “Y” transition.
level grill housing and the other end to the “Y” transition.
	3. Insert the shaft of the damper into the hole drilled in step 2. Place
Secure both ends in place using tape or a screw clamp to
create as air tight a seal as possible. Repeat this step for the		the washer, handle, then wing nut onto the shaft (Figure 12).
other room level grill housing (Figure 11).
			Wing Nut

	Exhaust to	Washer	Handle
	Wall/Roof Cap		Shaft
		Hole
	Fan	Damper
		“Y” Transition
		Figure 12
	“Y” Transition	4. Adjust the damper to balance airflow and tighten the wing
Grill Housing		nut to secure.
		SECTION 8
	Ducting	Wiring the Fan
Figure 11		CAUTION: MAKE SURE POWER IS SWITCHED OFF AT
		SERVICE PANEL BEFORE STARTING INSTALLATION.
5S7635037 New 10-06	www.airkinglimited.com		4 of 16