H
OSPI
-G
ARD
®
I
SO
C
LEAN
®
and
I
SO
C
LEAN
®
UV
Operation Manual
Page 7
3.6.1.4. The HEPA filtered exhaust air can now be vented to the outside or
returned to the main HVAC system
2
. If 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.
3.6.2. An optional 8-inch Duct Collar (Part No. 23877-002P) and Front Exhaust Cover
(Part No. 38236-001P) must be purchased separately to convert the IsoClean
®
UV unit to the 100% exhaust mode.
3.6.2.1. Remove the Exhaust Cover Plate for the IsoClean
®
UV located on top
of the IsoClean
®
UV by taking off the four (4) screws and plastic caps
used to secure the cover to the IsoClean
®
UV exhaust port.
3.6.2.2. Replace the Exhaust Cover Plate with the optional 8-inch Duct Collar
and secure it to the IsoClean
®
UV using the four (4) screws that
originally held the Cover Plate.
3.6.2.3. Remove the Front Exhaust Grille and replace with the Front Exhaust
Cover.
3.6.2.4. Attach flexible exhaust duct (not included) over the 8-inch collar and
fasten tightly with a round hose clamp (not included).
3.6.2.5. The HEPA filtered exhaust air can now be vented to the outside or
returned to the main HVAC system
3
. If 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.
3.7. Negative Pressure
NOTE:
CDC Guidelines recommend that rooms used for negative pressure isolation
should be single patient rooms with negative pressure relative to the corridor or
other areas connected to the room. The minimum pressure difference
necessary to achieve and maintain negative pressure that will result in airflow
into the room is 0.01 inch W.G. (a higher pressure is preferred). To achieve
this, the exhaust flow should be 10% or 50 CFM greater than the supply
(whichever is greater).
3.7.1.
Achieving Negative Pressure
3.7.1.1. The IsoClean
®
unit is designed to exhaust 100-300 CFM when the
6-inch exhaust collar is used. It 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 IsoClean
®
will exhaust approximately 300 CFM and recirculate 500 CFM.
__________________________________________________________________________________
2
CDC recommends that air from negative pressure rooms be exhausted to the outside in accordance with federal, state and local
regulations. The air should not be recirculated into the general ventilation. In 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.
3
CDC recommends that air from negative pressure rooms be exhausted to the outside in accordance with federal, state and local
regulations. The air should not be recirculated into the general ventilation. In 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.