4
Periodically clean return air intake and re-cleanable filter (if equipped).
The interval in between cleanings will vary per l
ocation depending on the
amount of particles in the air. The holes in the screen must be free from
obstructions to ensure that the blowers can get enough air to function
properly. To clean filter, remove screws and remove screen. Remove filter
and simply flush with hot water or steam. Filters are made of rustproof
aluminum or galvanized steel. After cleaning, allow the filter to dry before
returning it to the unit.
n
*Before any internal maintenance is performed be sure all power to unit is discon
-
nected and locked out.
While doing routine maintenance, verify that the discharge steering vanes
are adjusted properly. The steering vanes come pre-set from the factory
and will not need adjusted in most cases. In some cases of extreme condi
-
tions such as that of high winds, the steering vanes can be adjusted to point
further towards the outside to counteract the wind. See Air Directional
Adjustment below.
n
MAINTENANCE
AIR DIRECTIONAL ADJUSTMENT:
Air curtain comes equipped with a steer
-
ing vane in the discharge to allow for the
outward adjustment of the discharge air
direction. To adjust, first wrap a rag around
the vane so it is not scratched. Grip the
vane near the end on one side with a pair
of channel locks and rotate it in the direc
-
tion that you want the air to flow. Repeat
for the other side. Periodic cleaning of the
steering vane may be required. To clean it
just wipe it down with a damp rag.
Periodically do a visual inspection on the unit to ensure that the unit is not
damaged and is operating properly with all motors spinning.
n
*Note that the air curtain blowers are direct drive so there are no belts to
maintain.
n
Motors are permanently lubricated, so there are not any fittings that need
greased.
VANE PIVOT POINT
VANE
A
IR
FL
O
W
AI
R
FL
OW
INSTALLATION OPTIONS
Wall Mount
- Back side of air curtain has 4 mounting holes
capable of accepting four 3/8 mounting bolts or lags, with
washers (use these holes only for mounting). Mark and
pre-drill mounting surface accurately. A long extension and
ratchet will negate the need to remove the motor/blower
plate when installing. Mounting bolts or lags of sufficient size
and strength should be installed and tightened through the
four slots in the motor/blower plate.
Side Extension Brackets -
Exten
-
sion brackets bolt on to the back
of the unit, utilizing the 4 origi
-
nal mounting holes, and allow
-
ing for external mounting of unit
to wall. Brackets have elongated
mounting slots that extend the
mounting width by 2
1/2 to 3 1/2
inches.
* Threaded rod
and angle brackets
by others.
Angle Brackets
- Angle brackets (also called
knee or L-brackets) can be flush to the wall or
constructed to account for a projection from
the wall. For proper sizing provide distance
from wall to back of air curtain. Max. offset
of 20”.
Top Mount
- Unit has four 3/8-16 threaded in
-
serts for installing one end of threaded rods.
The other ends of the threaded rods can be
attached to the ceiling. Threaded rod should
not extend more than 3/4 inch into air curtain.
The bottom of the air curtain
should be flush with the top of
the opening if possible. If not
and the air curtain has to be
raised, the following applies:
For every one inch the bottom
of the air curtain is mounted
above the door header, the
back side of the air curtain
should be moved away from
the wall 1/2 inch.
INSTALLATION
NOTE
CORRECT Installation
INCORRECT Installation
CEILING
CEILING
DOOR
HEADER
Air stream blocked
by door header
before it reaches
open door.
4 in.
8 in.
Air stream has a
clear path to the
open doorway.
AIR CURTAIN
AIR CURTAIN
3
