Five Seasons DM900UV-VO-A Owner's Manual page 4

GENERAL INSTALLATION STEPS
(Collar Mount) (see Fig. 2)
(Inlet collars are available as a kit from your
distributor)
1. Before installing, remove any packaging. Open
the door and remove the filters. Remove the
lower panel on the front of the unit to remove
PCO and VOC filters and the lamps and gloves
which were packed at the bottom of the unit.
See Maintenance for instructions to remove the
filters.
If the top and bottom openings are being used to
install this Air Cleaner, ducting MUST be installed to
ensure no light escapes from the unit.
2. This unit can be installed with collars and
aluminum flexible ducting if desired. DO NOT
use plastic duct. Openings are pre-punched
on the top and bottom of the unit for this
purpose. Remove the plastic film covering the
holes and snip out the joints to open the hole.
Do not open the holes on the back of the
unit if you are collar mounting the Air
Cleaner.
3. The collar is installed with the flange on the
inside of the cabinet with only the collar ring on
the outside of the cabinet. Compress the collar
until you can insert the flange into the opening
in the enclosure. Enlarge the collar to its
maximum and install two screws into the ring to
hold it to the proper diameter. Turn the collar in
the hole until the holes in the enclosure line up
to the holes on the collar flange. Secure with
the screws provided.
Fig. 2 – Collar Mount Installation
WARNING
4. The intake collar on the return duct must be
installed after the last return branch connection
on the plenum. If outside air is introduced into
the return air duct, either through a HRV (Heat
Recovery Ventilator) or direct, it should be
added to the system before the intake inlet to
the Air Cleaner.
5. The 8 inch intake collar (top) must draw air from
the return duct at a location that will be ahead of
the clean exhaust air, that will be returned to the
duct from the Air Cleaner.
An 8 inch collar will be installed on the return
duct and a length of 8 inch flexible hose or duct
is required to attach between the 8 inch intake
collar and the collar on the return duct. When
running the hose, make sure that there are no
kinks or sharp bends that will impede the air
flow to the unit. Secure and seal the hose and
connections to prevent air leakage.
6. The 8 inch exhaust collar can be mounted in the
same manner to the bottom of the unit. An 8
inch collar will be installed on the return duct
close to the furnace and a length of 8 inch
flexible hose or duct is required to attach
between the exhaust collar and the collar on the
return duct. Do Not use plastic duct. The ideal
location is low on the return air boot pointing at
the furnace. To prevent air shear inside the
duct, it is recommended that you install a
deflector inside the boot, so the discharged air
is deflected down into the boot. When running
the hose, make sure that there are no kinks or
sharp bends that will impede the air flow from
the unit. Secure and seal the hose and
connections to prevent air and UV light leakage.
Alternate Installations
Fig. 3 – Self-Contained Basement Installation
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