ClimaCool IOM AR2 SERIES - Manual (Page 25)

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®
Description:
The pressure differential alarm option continually monitors
and displays the strainer’s inlet and outlet differential
pressure . When the strainer element (conical strainer basket)
becomes significantly clogged, the pressure differential
switch-gauge will trigger an audible siren and a visual
flashing alarm light . These alarms are intended to alert
maintenance personnel that the strainer element must be
removed and cleaned (see page 18 for complete strainer
element cleaning instructions) .
Operation Instructions:
Remove the power supply and insert the connector end into
the socket on the bottom of the PDA housing, as indicated
in the drawing above . Plug the transformer into the power
source . Standard systems are supplied with a 120V power
supply to the primary of the transformer, with an output,
secondary of 12 VDC .
The pressure differential switch-gauge is factory set to
7-8 PSI . The ClimaCool Strainer operates at a pressure
differential slightly less than 1 PSI during maximum flow
when the strainer screen is clean . By the time this differential
pressure reaches 7-8 PSI, the strainer element will be
significantly clogged and require immediate removal and
cleaning .
To adjust the pressure differential switch-gauge setting, insert
a 1/16” allen wrench and rotate the differential set-point
contact to the desired location (see Fig . 1) .
Note: We do not recommend setting the differential
switch-gauge higher than 10 PSI. Disabling the alarm
or increasing the alarm set point could result in damage
to the strainer element and allow debris to pass into the
system.
PSID High
PSID Low
Pressure Differential Alarm (PDA) option
Alarm Reset Button
FRONT
VIEW
LEFT SIDE
VIEW
Power To ATF
110 Volt/12 Volt DC
Wall Transformer
Visual
Alarm
Audible
Alarm
Pressure Differential
Switch-Gauge
LED Power Indicator
Differential
Set-Point Contact
Cover-Plate Screw (4) in Corners of
Box (DO NOT REMOVE).
Visual
Alarm
RIGHT SIDE
VIEW
TOP
VIEW
BOTTOM
VIEW AUX Contacts
(On or Off with Alarm)
Red & Black
Cable Retainer
Pressure Differential Alarm Option