Low oil guard for 5 to 25 hp compressors, Tf0628, Installation (continued) – Campbell Hausfeld LOW OIL GUARD TF0628 User Manual

Page 2: Operation, Maintenance

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2

Operating Instructions and Parts Manual

Low Oil Guard
for 5 to 25 HP Compressors

Installation (Continued)

guard must be tested to verify proper
installation. Before refilling crankcase
with oil, briefly turn on power to the
compressor motor (2-3 seconds max.).

NOTE: Some oil film remains on the lu-
bricated parts of the compressor.
Running the compressor dry for 2-3 sec-
onds will not cause any damage.

If motor does not run, installation is
correct. If motor begins to run, turn
power off immediately. The installation
is wrong and the following items
should be checked:

1. Check for loose wire connections.

2. Check for wrong wiring (Refer to

Figure 4, 5 or 6).

3. Check to see if the float mechanism is

moving freely.

4. Check the compressor for a level

position.

After the monitor installation has been
tested and found correct, refill the com-
pressor pump with compressor oil. For
complete information on compressor
pump oil, see your compressor pump
manual.

TF0628

PRESSURE
SWITCH

FUSED DISCONNECT
OR BREAKER

RED

ORANGE

WHITE

BLACK

OIL

LEVEL

GUARD

L 2

L 1

O.L.

MAGNETIC
STARTER

T 2

T 1

SINGLE

PHASE

MOTOR

COIL

PRESSURE
SWITCH

FUSED DISCONNECT
OR BREAKER

RED

ORANGE

WHITE

BLACK

OIL
LEVEL
GUARD

L 3

L 2

O.L.

MAGNETIC
STARTER

T 2

T 1

T 3

L 1

THREE
PHASE

MOTOR

COIL

Operation

In normal operation, the low oil-level
monitor should not have any effect on
the performance of the compressor. If
the oil level in the pump is too low, the
monitor will shut off power to the
motor, stopping the compressor pump.

Maintenance

The operation of the low oil-level mon-
itor should be checked at every oil
change. After the oil has been drained
from the crankcase, repeat the initial
test as previously described.

Figure 4 - 208-230 Volt Single-Phase Wiring Diagram

Figure 5 - 208-230 Volt Three-Phase Wiring Diagram

Wire nut not
included

Wire nut not
included

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