System 450 Sensors And Sensor Types For C450Ccu; Condensing Unit Control System Sensors And Switches - Johnson Controls System 450 Series Technical Bulletin

The condensing unit control module automatically designates the sensor connected to the Sn-1
terminal and a common (C) terminal as the Sn-1 sensor in the UI. The sensor connected to the Sn-2
and a C terminal is designated Sn-2. Set up each sensor on the corresponding sensor setup screen
in the UI.
Note: To operate the condensing unit control system, you must wire the correct temperature
sensor or pressure transducer model to the correct sensor input terminals on the control
module. Select the correct sensor type on the select sensor type screen on the UI.
For more information about how to set up sensors and sensor types in the condensing unit control
module UI, see Setting up a condensing unit control system
transducers.

System 450 sensors and sensor types for C450CCU

Table 3: Condensing unit control module sensor information
Sensor Unit of measurement
type value (condition and
units)
°F °F (temperature and
degrees)
°C °C (temperature and
degrees)
bin Open or closed
P8 Bar (Pressure)
P15 Bar (Pressure)
P100 PSI (Pressure/psi)
P110 Hg/PSI (Pressure/Hg-psi)
P200 PSI (Pressure/psi)
For more information about compatible A99 Series Temperature Sensors for use with the C450CCU
condensing unit control module, see Table 23 in
For more information about compatible P499 Pressure Transducers for use with the C450CCU
condensing unit control module, see Table 24 to Table 26 in

Condensing unit control system sensors and switches

C450CCU condensing unit control systems use A99 Series positive temperature coefficient (PTC)
sensors. Other temperature sensors cannot substitute the A99 Series sensors. For information
about the available A99 Series temperature sensors, see
System 450 Series C450CCU Condensing Unit Control System Technical Bulletin
Effective Range of Resolution
sensing usable increment
range values value
-46°F to -40°F to 1
255°F 250°F
-43°C to -40°C to 0.5
124°C 121°C
-1 bar to 8 -1 bar to 8 0.5
bar bar
-1 bar to - -1 bar to 15 0.10
15 bar bar
0 to 100 0 to 100 0.5
-10 to 100 -10 to 100 0.5
0 to 200 0 to 200 1
Ordering information
and Setting up the sensors and
Minimum
proportional or
control band
1
0.5
1
1
1
1
1
Ordering information
Ordering information.
Sensor product
number
A99x-xxx
A99x-xxx
P499RCP-401C
P599RCPS401C
P499RCP-402C
P599RCPS402C
P499RAP-101C
P499RAP-101K
P499RCP-101C
P499RCP-101K
P599RAPS101K
P599RCPS101K
P499RAPS-100C
P499RAPS-100K
P499RCPS-100C
P499RCPS-100K
P599RAPS100K
P599RCPS100K
P499RAP-102C
P499RAPS102C
P499RAPS102K
P499RCPS102C
P499RCPS102K
P599RAPS102K
P599RCPS102K
.
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