Manufacturer: Johnson Controls
Description: DIRECT MOUNT PRESS.TRANSDUCER
Category: Electrical Controls
P35 Pressure Transducer and VFD66 Control
IMPORTANT: The P35 Pressure Transducer is
intended to provide an input to equipment under
normal operating conditions. Where failure or
malfunction of a P35 Pressure Transducer could
lead to an abnormal operating condition that could
cause personal injury or damage to the equipment
or other property, other devices (limit or safety
controls), or systems (alarm or supervisory)
intended to warn of, or protect against, failure of
the P35 Pressure Transducer must be
incorporated into and maintained as part of the
The P35 Pressure Transducer provides a control
signal to the VFD66 Series Condenser Fan Speed
Control. The P35 transducer and VFD66 control
work together to vary the speed of the condenser
fan based on refrigerant pressure and to provide the
optimum head pressure for the given load demand
on the refrigeration or air conditioning system.
IMPORTANT: Improper mounting of the P35
transducer can result in malfunction of or damage
to the transducer. Mount the transducer upright
and level. Locate pressure tap points on the top
side of the refrigerant lines. Mount the transducer
where it is not exposed to rain or other moisture.
IMPORTANT: If the P35 pressure transducer is
installed on equipment that contains hazardous or
regulated materials, such as refrigerants or
lubricants, the installer and user should observe all
regulations governing the handling and
containment of those materials.
The P35 transducer has an integral Schrader
depressor and mounts directly to a 1/4 in. SAE male
flare fitting. Mount the P35 transducer downstream
from the coil, away from severe pressure pulsation
and mechanical vibrations, which can occur near the
Use the holes in the mounting bracket to attach the
transducer to a flat surface. Use only
the screws provided to mount the transducer and
! WARNING: Risk of Electrical Shock.
Disconnect power supply before making electrical
connections to avoid possible electrical shock.
Use the following instructions when assembling and
wiring the terminal block assembly:
1. Remove the fastening screw.
2. Locate the small slot on the side of the terminal
block and use a small standard screwdriver or
similar tool to carefully remove the terminal block.
3. Remove the threaded bushing and insert the wires
through the bushing, spacer, grommet, and terminal
4. Connect the wires to the terminal block. Note the
numbering sequence molded into the front of the
5. Insert the terminal block into the housing, and
secure both to the P35 transducer with the fastening
6. Tighten the threaded bushing.
Replaces Part Numbers: P35AG-9200R, CARP35AG-9200R