Johnson Controls P70 Mode D'emploi page 6

Avoid Contact between the Capillary Tubing and
Sharp or Abrasive Objects
Vibration of sharp or abrasive objects in contact with
capillary tubes can result in leaks.
Do Not Overtighten Flare Nuts on Pressure
Connection Line Fittings
Overtightening flare connections may damage the
threads on the flare nuts or flare connectors, and may
result in leaks. Do not exceed 9 ft·lb (12 N·m) of torque
when tightening brass flare connections.
Avoid Severe Pressure Pulsation at Pressure
Connections
Install pressure connection lines to pressure tap points
away from the compressor, to minimize the effects of
pressure pulsation from reciprocating compressors.
IMPORTANT: After installing the control,
evacuate the control and
pressure connection lines in
accordance with applicable
Environmental Protection Agency
(EPA) and other regulations, to
remove air, moisture, and other
contaminants.
W
iring
P70, P72, and P170 controls for low pressure
applications are available with several switch options
and electrical ratings. Check the label inside the
control cover for model number, switch action, and
electrical rating. (See Table 1 for switch action and
models.)
Check the wiring terminal designations on the control
switch-block and refer to the following guidelines and
applicable wiring diagrams, when wiring the control.
!
WARNING: Risk of Electric Shock.
Disconnect power supply before
making electrical connections to
avoid possible electric shock or
equipment damage.
IMPORTANT: Use terminal screws furnished in
the switch block. Using other
terminal screws will void the
warranty and may damage the
switch.
P70, P72, and P170 Controls for Low Pressure Applications Product/Technical Bulletin
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IMPORTANT: Make all wiring connections in
accordance with the National
Electrical Code and all local
regulations. Use copper
conductors only. Do not exceed
the control's electrical rating.
Figure 5: Typical Wiring for SPST Open-Low
Switch and Open-High Switch
(P70A, B, C, D and P170A, C, D, Models)
Figure 6: Typical Wiring for SPDT Switch
(P70E, F Models)
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