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3.3 Air Ducting
3.3A Inlet Ducting
Occasionally the area to be filtered is difficult to access and/
or the unit cannot be located in the area. In such cases, the
air can be ducted to the unit’s inlet.
A round 16” diameter flexible duct can be attached to the
unit inlet. It connects by placing the wire in the duct over the
duct collar lip at one location and working over it over the lip
gradually. It may be removed after use for easier transport
and storage. Flexible 16” duct is available from Therma-Stor
LLC. (4028357)
3.3B Outlet Ducting
A detachable trapazoid shaped exhaust ring is supplied that
will allow 10” round lay-flat plastic duct to be attached to
the Phoenix Guardian R HEPA System outlet. Lay-flat plastic
ducting is available from Therma-Stor LLC. (4024935)
To attach ducting to the collar, remove the ring from the unit
by pressing release tab at the top of the grill. Put the plastic
duct end through the inside of the ring. Roll the duct end
outward so that it over-laps the outside of the ring. Clip the
ring back onto the exhaust grill.
3.3C Negative Air Ducting
The Phoenix Guardian R HEPA System can be used to filter
and exhaust air from a space. When exhausting to outside
the space, the space will be under a slight negative pressure.
This will help prevent airborne particles from leaving the
space, because the negative pressure will draw air in through
openings in the space’s exterior surfaces.
CAUTION: Exhausting too much air from a space with open
combustion devices (e.g. furnace, fireplace or water heater)
can cause those devices to backdraft. This can contaminate
the space with potentially fatal gases.
In such cases, the Phoenix Guardian R HEPA System must be
used in one of the following three ways:
A. As a filtering unit only. Exhausting no air from the
space and thus causing no negative pressure or
backdrafting.
B. Exhausting a very limited amount of air which does not
cause backdrafting. In case B, the open combustion
devices must be thoroughly checked to guarantee that
they do not backdraft while the Phoenix Guardian R
HEPA System is running.
C. Direct the outlet duct from the Guardian R HEPA System
to the room with the open combustion device(s). This
will positively pressurize the room with HEPA filtered
air, thus preventing backdrafting. As in case B, those
combustion devices must be checked after the Guardian
R HEPA System is running to guarantee that they are not
backdrafting.
3.4 Power/Speed Control
The power/speed switch is located on the control panel.
When turned on to any speed, it powers the impeller fan.
Occasionally the impeller fan may not start on low speed. If
this occurs, rotate the speed control to high speed until the
impeller fan starts, then adjust it to a lower speed.
CAUTION: Do not remove HEPA filter with the unit on.
Removing the top and filters while running will expose the
dangerous rotating impeller fan. Disconnect the appliance
before changing filters.
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To remove ducting
