Isolation Systems Inc
Operation and Maintenance Manual PASS-1600ISO
2 October, 2020
Isolation Systems Inc
10
889 Erie Ave, North Tonwanda NY, 14120
2.4 Adjusting for Differential Pressure
2.4.1 For a
neutral
pressure application (recirculation only), the dampers on both the exhaust
and intake sides should be lowered to fully cover the smaller ports. The larger ports will be
fully uncovered to provide circulation at neutral pressure.
Small Ports fully
covered by
dampers for
Neutral Pressure
(Recirculation Only)
Exhaust End
Intake End
Important. For recirculation mode the room pressure fault alert must be overridden. Press the
Audio Alarm Cancel button on the Display Panel for 5 seconds to cancel the pressure fault
alert. An
R
will appear in the Digital Display next to the Room Pressure to indicate operation is
in the Recirculation mode.
2.4.2 For a
negative
pressure application, open the air flow damper on the smaller port on the
EXHAUST
end until about 1/3 open. Fully close the intake side’s smaller port damper.
2.4.3 For a
positive
pressure application, open the air flow damper on the smaller port on the
INTAKE
end until about 1/3 open. Fully close the exhaust side’s smaller port damper.
•
Attach the air supply and return ducting according to your selected configuration (see
examples below).
•
Plug in the unit, turn the power switch to ON, and adjust the blower speed control for the
desired airflow (0 to 1600 CFM).
•
Observe the pressure reading on the digital display and readjust the damper to achieve
the desired pressure differential. If the desired pressure differential cannot be achieved
even with a fully opened damper, increase the blower speed and repeat damper position
adjustment.
•
The CDC recommended differential pressure is > 0.01 inches WC.
•
When setup is complete, monitor the digital display for proper operating parameters and
for error alerts.
