Envirco Isoclean UV - Manual (Page 10)

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H
OSPI
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I
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LEAN
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and
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SO
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UV
Operation Manual
3.5. Partial Exhaust/Recirculation Mode
NOTE: The lsoClean and lsoClean UV units come with a removable Exhaust Cover
Plate and a removable 6-inch (152mm) Duct Collar for attachment to exhaust
ducting (not included) to create a negative pressure room. lf the Exhaust
Cover Plate is not removed, both the lsoClean and lsoClean UV
units will
operate in the 100% recirculation mode.
3.5.1. Remove the Exhaust Cover Plate located on top of the lsoClean unit by taking off
the four (4) screws and plastic caps used to secure the cover to the lsoClean
exhaust port.
3.5.2. Remove the 6-inch (152mm) duct collar underneath the top cover and flip the
collar over.
3.5.3. Attach exhaust ducting (not included) onto the collar and fasten tightly with a
round hose clamp (not included).
3.5.4. Mount the duct collar with ducting onto the lsoClean exhaust port using the four
(4) screws that originally held the cover p ate.
NOTE: Keep the top plate and plastic washers for re-assembly when needed.
3.5.5. The HEPA filtered exhaust air can now be vented to the outside or returned to
the main HVAC system
1
. lf the unit is ducted to an exhaust duct rather than
directly to the outside, it must be verified that the exhaust duct is capable of
handling the exhaust air expelled by the unit.
3.5.6. The lsoClean is designed to exhaust 100-300 CFM (170-510 m 3 /h) at the 6-inch
exhaust port. lt is recommended that the unit be set on the high-speed setting
when operating in this mode to achieve maximum exhaust and negative pressure.
At this setting, the lsoClean will exhaust approximately 300 CFM (510 m
3 /h) and
recirculate 500 CFM (850 m 3 /h).
3.6. Total Exhaust Mode (Negative Pressure)
NOTE: The cover plate must be securely attached to the top of the lsoClean for the
unit to run in the 100% exhaust mode.
3.6.1. An optional 8-inch (203mm) Exhaust Collar with Flange (Part No. 11055) is
available to convert the lsoClean unit to the 100% exhaust mode.
3.6.1.1. Remove the front exhaust grille by pulling down and lifting out.
3.6.1.2. Place the optional 8-inch (203mm) exhaust collar over the opening where
the grille was removed and attach with the screws included with the 8-inch
collar.
3.6.1.3. Attach flexible exhaust duct (not included) over the 8-inch collar and
fasten tightly with a round hose clamp (not included).
1
CDC recommends that air from negative pressure rooms be exhausted to the outside in accordance with federal, state, local or country
regulations. The air should not be recirculated into the general ventilation. ln certain cases in existing facilities, recirculation of air into the
general ventilation system is unavoidable and, in such cases, CDC guidelines state that HEPA filters should be installed in the exhaust
duct leading from the room to the general ventilation system.