Product Overview
Table Of Contents
- Code No. LIT- 1900170
- P70, P72, and P170 Series
- Controls for Low Pressure Applications
- P70AB-12 MICRO-SETTM Low Pressure Control
- Selection Chart for Standard P70, P72, and P170 Controls for Low Pressure Applications
- Technical Specifications
- Typical Wiring for SPST Open-Low Switch and Open-High Switch (P70A, B, C, D, and P170A, C, D, Models)
- Typical Wiring for SPDT Switch (P70E, F Models)
- Typical Wiring for 4-wire 2-circuit Switch (P70G and H Models)
- Typical Wiring for DPST Switch (P72A and B Models)
- Dimensions for Low Pressure Controls with NEMA 3R Enclosure, in. (mm)*
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. © 2009 Johnson Controls, Inc.
www.johnsoncontrols.com
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Controls for Low Pressure Applications (Continued)
Technical Specifications
Single Pressure Controls Switch Action, Low Event, High Event, and Models
Switch and Action Low Event High Event Models
Single-Pole Single-Throw (SPST)
Open-low
Cut Out
(Opens Line to M1)
Cut In
(Closes Line to M1)
P70A, P70B, P170A
Single-Pole Single-Throw (SPST)
Open-high
Cut In
(Closes Line to M1)
Cut Out
(Opens Line to M1)
P70C, P70D, P170C, P170D
Single-Pole Double-Throw (SPDT) Opens 1 to 2 and
closes 1 to 3
Closes 1 to 2 and
Opens 1 to 3
P70E, P70F
4-wire, 2-circuits, 1 N.O., 1 N.C.
Open-low
Cut Out
(Opens M2 to Line and Closes M1 to Line)
Cut In
(Closes M2 to Line and Opens M1 to Line)
P70G, P70H
4-wire, 2-circuits, 1 N.O., 1 N.C.
Open-high
Cut In
(Closes M2 to Line and Opens M1 to Line)
Cut Out
(Opens M2 to Line and Closes M1 to Line)
P70J, P70K, P170K
Double-Pole Single-Throw (DPST)
Open-low
Cut Out
(Opens M1 to Line and M2 to Line)
Cut In
(Closes M1 to Line and M2 to Line)
P72A, P72B
Double-Pole Single-Throw (DPST)
Open-high
Cut In
(Closes M1 to Line and M2 to Line)
Cut Out
(Opens M1 to Line and M2 to Line)
P72C, P72D
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)
Typical Wiring for SPST Open-Low Switch and Open-High Switch
(P70A, B, C, D, and P170A, C, D, Models)
p7s_wir_spst.eps
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
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 4-wire 2-circuit Switch (P70G and H Models)
p7s_wir-4-2.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 3-phase applications.)
Typical Wiring for DPST Switch (P72A and B Models)
p7s_wir_dpst.eps