Air King 5000 Installation & Operation Manual page 5

BAD INSTALLATION
Figure 5
SUPPLY DUCT
WARM AIR
1. The bypass collar and damper and the humidifier body are
installed on the same ducting. This unit will not operate at all,
there will be no air-flow through the unit, the air pressure will
just equalize. This will be the case if both components are
mounted on the return or on the supply duct.
BAD INSTALLATION
Figure 6
SUPPLY DUCT
WARM AIR
1. The humidifier body is not mounted level on the duct. The
water which flows to the distribution tray and through the
evaporator pad will all run down one side of the evaporator pad.
2. The bypass collar and tube and humidifier body are not
mounted level. This will restrict air flow through the humidifier
as well as create uneven air-flow over the evaporator pad and
activating sensors.
3. The bypass tube used is well over the 36" supplied, the flex
tube is not pulled tight and the most direct route to the
opposite duct was not taken. This will restrict air flow through
the humidifier as well as create uneven air-flow over the
evaporator pad and activating sensors
RETURN DUCT
COLD AIR
Bypass tube and
humidifier installed
on the same duct
RETURN DUCT
COLD AIR
Bypass required is
more than 30" and
installer is using
flex tube
Unit is not level
Bypass collar and
humidifier not parallel
Model 5000 Flow Through Humidifier
• INSTALLATION TIP: In this type of installation the
installer should have mounted the bypass collar and
damper in the most convenient location to run ducting
back to the unit. If for some reason it was necessary to
run ducting like this, hard metal ducting and elbows
(sold separately) rather than the flex tube should be
used; the installer should also try to find the most direct
route to duct. While the humidifier and bypass collar
and damper may be more than the recommended 30",
apart the use of hard ducting rather than the flex ducting
will make up for any restrictions or turbulence which
would occur in aluminum flex tube. Flexible ducting
may be the most convenient for installation purposes
however when it comes to air-flow it is highly restrictive
(see fig 7.), its use should be kept to a minimum and
when used it should be pulled as tight as possible.
FLEX LOOSE
EQUIVALENT LENGTH = 9 FEET
HARD DUCTING ELBOW (90°)
EQUIVALENT LENGTH = 10 FEET
PREPARING THE HUMIDIFIER
FOR INSTALLATION
Model 5000 humidifiers may be mounted on the supply (hot air)
or return duct (cold air), however we recommend for safety
reasons you install it on the return duct, this will minimize the
high temperature the unit and components are exposed to. Only
install on the supply duct (hot air) if absolutely necessary and
ensure that the water supply, drain tube, or any other component
do not come into contact with hot surfaces or sharp edges.
Replace any component at the first sign of wear.
CAUTION: When cutting or drilling into ducting take care not to
damage any air-conditioning coils or other furnace apparatus
CAUTION: Wear safety glasses and work gloves when installing
this unit; sharp metal edges can cause severe injury.
CAUTION: Turn the furnace off before starting this installation.
STEP #1: RIGHT HAND DUCTING OR LEFT HAND DUCTING
Depending on your furnace, or for the convenience of your
installation it may be necessary to convert the humidifier from
right hand ducting or left handing ducting. Follow the steps below
to switch the side which the bypass duct will attach to the unit.
SWITCH THE DUCTING ONLY IF YOUR APPLICATION
REQUIRES IT.
1. Remove the humidifier front cover, which is secured in place
with a 10-24 plastic thumb screw at the bottom of the cover.
Figure 7
FLEX PULLED TIGHT
EQUIVALENT LENGTH = 2 1/2 FEET
FLEX DUCTING ELBOW (90°)
EQUIVALENT LENGTH = 30 FEET
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