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20"/100#LS, 100/425#HS AMM. P70 Series MICRO-SETTM Pressure Control

Price: $337.54
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Manufacturer: Johnson Controls

Description: 20"/100#LS,100/425#HS AMM.# SW

Category: Electrical Controls

Sub Category: Pressure Controls

P70 Series MICRO-SETTM Pressure Controls

for Refrigeration and Air Conditioning,

4-Wire, 2-Circuit Contact Block

P70 single and dual function
pressure controls are used in
commercial air conditioning and
refrigeration applications. The
load-carrying contacts provide
direct control of A.C. motors
within the control’s rating. (See
cover label for the electrical
The controls can be used with R-
12, R-22, R-500, or R-502
refrigerants. Specific models for
ammonia applications are also
available. The MICRO-SET
construction of low pressure
controls and low side of dual
models permits differentials to a
minimum of 5 psi (34 kPa).

! WARNING: On ammonia
applications, the ammonia
P70 pressure control must
be mounted separately from
the electrical cabinet.

All Series P70 controls are
designed for use only as
operating controls. Where an
operating control failure would
result in personal injury and/or
loss of property, it is the
responsibility of the installer to
add devices (safety, limit
controls) that protect against, or
systems (alarm, supervisory
systems) that warn of control

The controls have a single “sight-set” calibrated scale which
shows cutout setting and the
differential. Adjustments can be
made readily without removing
the control cover.


Mount the control on a flat
surface or panel board by two
screws or bolts through the holes
in the back of the case. The
control should be mounted above the element connections
to provide drainage from the
sensing elements. The pressure
connection on the bellows should
be above the liquid level of the
equipment on which the control
is used. This reduces possible
accumulation of foreign matter
inside the bellows.

! CAUTION: Do not mount

the control in a position

where dirt, sediment, or oil

will affect the operation of

the control.

Replaces Part Numbers: P70LA-2, CARP70LA-2

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