P545 Series Electronic Lube Oil Control Product/Technical Bulletin
5
Mounting
Mount the P545 Control
Use the mounting holes shown in Figure 5 for
mounting the control on a flat vertical surface. Two
No. 10 screws are provided for this purpose. Do not
use longer screws, as damage to internal components
may occur. Mount the control in an upright position,
and avoid warping or bending the case.
Use the Universal Mount (Part No. 271-51) to mount
the control to a vertical or horizontal surface. This
requires two 10-32 UNF-2B screws (not included).
Mounting Holes for a
Flat Vertical Surface
No. 10 Screws
(2 provided)
Universal Mounting
Bracket (UMB)
10-32 UNF-2B Screw
(not provided)
12
01
10
12
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Mounting Holes
for UMB
Figure 5: Mounting the P545 Control
Mount the P400 Switch
If you modify an existing refrigeration compressor to
accept the P400 switch, it may involve installing a
sensor block (such as a Johnson Controls®
CST29A-600C) or other part. For proper installation,
follow all procedures recommended by the compressor
manufacturer.
To mount the P400 switch:
1. Wet the switch nozzle and gasket with oil.
2. Fit the gasket over the nozzle as shown in
Figure 6.
3. Install the switch in the lube oil port according to
the compressor manufacturer’s instructions.
4. Hand-tighten the switch until the surfaces of
gasket and compressor housing meet.
5. Use a torque wrench to tighten the sensor until
sealed (40 lb
⋅
ft recommended torque).
Wiring
See Figure 7 through Figure 12 for typical wiring
diagrams, or refer to the compressor manufacturer’s
specifications. Make all wiring connections using
copper conductors only. Ensure all wiring conforms to
the National Electrical Code and local regulations.
!
WARNING: Risk of Electric Shock.
Disconnect the power supply before making electrical
connections. Contact with components carrying
hazardous voltage can cause electric shock and may
result in severe personal injury or death.
AVERTISSEMENT: Risque de décharge
électrique.
Débrancher l'alimentation avant de réaliser
tout branchement électrique. Tout contact avec des
composants conducteurs de tensions dangereuses
risque d'entraîner une décharge électrique et de
provoquer des blessures graves, voire mortelles.
Wire the P400 Switch
Use this procedure to connect the P400 switch to the
control:
1. Insert the plug into the connector until it snaps and
locks in place. See Figure 6.
2. Connect the wiring harness to the P545 control at
P2. See Figure 13 for the location and orientation
of the differential oil pressure switch connection.
Note:
The control does not function properly if the
wiring harness is connected improperly at the circuit
board.
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10
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Lube Oil Switch
Wiring
Harness
To P2 Connector
Insert
Plug
Switch
Nozzle
Gasket
Figure 6: Connecting the Wiring Harness to the
P400 Switch
