Table 3: P70, P72, and P170 Pressure Control Selection Matrix
P70 Various pressure connection styles available on many models (See Figure 11.)
P170 1/4 in. male flare pressure connection only (Style 5, see Figure 11.)
P72 DPST switch only, 3/4 in. conduit opening on most models, (E, F, G, H, J, and K, models not available)
A SPST switch (DPST in P72), Open-low, automatic reset
B SPST switch (DPST in P72), Open-low, manual reset lockout
C SPST switch (DPST in P72), Open-high, automatic reset
D SPST switch (DPST in P72), Open-high, manual reset lockout
E 1 hp SPDT switch (n/a in P72), automatic reset
F 1/4 hp SPDT switch (n/a in P72), automatic reset
G 4-wire, 2-circuit switch (n/a in P72), main switch Open-low, automatic reset
H 4-wire, 2-circuit switch (n/a in P72), main switch Open-low, manual reset lockout
J 4-wire, 2-circuit switch (n/a in P72), main switch Open-high, automatic reset
K 4-wire, 2-circuit switch (n/a in P72), main switch Open-high, manual reset lockout
A NEMA 1 enclosure, no adjustment knob
B NEMA 1 enclosure, with adjustment knob
C No enclosure, no adjustment knob
D No enclosure, with adjustment knob
E NEMA 3R enclosure, no adjustment knob
G NEMA 3R enclosure, no adjustment knob
H NEMA 1 enclosure, no adjustment knob, 1/4 in. quick connects
J NEMA 1 enclosure with adjustment knob, 1/4 in. quick connects
N NEMA 1 enclosure no adjustment knob, transportation application
P NEMA 1 enclosure with adjustment knob, transportation application
S NEMA 3R enclosure, no adjustment knob, transportation application
Note: Not all matrix combinations are available. To verify product availability and for quantity orders of
non-standard items,please contact Refrigeration Application Engineering at (414) 274-5535.
Figure11: Pressure Connections Styles Available on P70, P72, and P170 Controls
10 P70, P72, and P170 Controls for Low Pressure Applications Product/Technical Bulletin
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