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Air Switching Cumulator (Johnson Controls)

Price: $256.13
Excl. Shipping
SKU: PIL95061C
(See Product Details Below for Manufacturers Part Numbers)
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Manufacturer: Johnson Controls


Category: Pneumatic Controls

Sub Category: Controllers

Air Switching Cumulator

The C-9506 Air Switching
Cumulator is an auxiliary device
designed to switch its output
pressure from zero to full supply
pressure when the pilot pressure
reaches the switch point. It is
ideally suited for exhaust
damper applications requiring a
high output volume for quick
operation. The switch point is
factory set at approximately
9 PSIG (63 kPa) and is
adjustable from 2 to 12 PSIG
(14 to 84 kPa).
The C-9506 also doubles as the
unit replacement for all models
of D-9502 and V-9502


The C-9506 is a two-position
device with a 1 PSI (7 kPa)
differential. When the pilot
pressure is below the switch
point, the output will be zero.
As the pilot pressure rises above
the switch point, the output will
switch to full supply pressure.
When the pilot pressure drops
to 1 PSI below the switch point,
the output pressure will drop
back to zero.

Note: The C-9506 should not
be activated by a transmitter
or low-sensitivity controller.

A low volume input change
could cause the instrument to


The C-9506 is designed for
mounting in any position using
the two mounting holes in the
base of the instrument. Allow
enough clearance for cover
removal and switch point
adjustment. Air connections are
made to barbed fittings for 5/32
or 1/4 in. O.D. polytubing.


Note: The calibration
procedure below should only
be followed when the C-9506

is used as an air switching
cumulator. To calibrate the
C-9506 when it is used as a

positioner, refer to Product
Data D-9502 and/or V-9502 for
the proper procedure.

To adjust the switch point of the
C-9506 air Switching
proceed as follows:

1. Furnish 20 PSIG (140 kPa)
to the supply “S” port.

2. Apply the desired switch
point pressure to the pilot “P” port.

3. Remove the cover and turn
the adjusting screw
counterclockwise to
increase or clockwise to
decrease the switch point
until the output pressure
switches to 20 PSIG

Note: The output pressure
reading can be taken either
using a pressure gage in

the output line or at the
hypodermic needle test
point on the cumulator

4. Increase and decrease the
pilot pressure to check the
switch point differential of
the C-9506.

Replaces Part Numbers: C-9506-1, CARC-9506-1


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