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The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc. www.johnsoncontrols.com
R-94
P70, P72, and P170 Series Controls for Low Pressure Applications
(Continued)
Standard Electromechanical Pressure Controls
1
2
3
L1
L2
Load
Alarm
1 to 3 opens, and 1 to 2 closes
on pressure rise.
Typical Wiring for SPDT Switch (P70E, F Models)
p7s_wir_spdt.eps
Typical Wiring for DPST Switch (P72A and B Models)
p7s_wir_dpst.eps
Line
M1
L1
L2
Load
Line
M2
Line to M1 and Line to M2 open on pressure drop.
L3*
*(L3 is third supply line in three-phase applications.)
Typical Wiring for Four-Wire Two-Circuit Switch
(P70G and H Models)
p7s_wir-4-2.eps
Line
M1
L1
L2
Load
Line
M2
Alarm
Circuit
Power
Alarm
Main circuit (Line to M2) opens and
auxiliary circuit (Line to M1) closes
on pressure rise.
Typical Wiring for SPST Open Low Switch and Open High Switch
(P70A, B, C, D, and P170A, C, D, Models)
L1
L2
Load
Line
M1
Open-High switch action:
opens on pressure rise.
(C and D Models)
L1
L2
Load
Line
M1
Open-Low switch action:
opens on pressure drop.
(A and B Models)
p7s_wir_spst.eps