Additional controls in this line only.
Crankcase
Heater
When Used*
240
1
L
2
M
A
120
P28 or P128
*Crankcase heater cannot be cycled with this hookup. See Figure 5.
Figure 4: P28 or P128 Used on a 240V System with
240V Magnetic Starter Coil
Additional controls in this line only.
Crankcase
Heater
Runlight
When Used*
if Used
240
3
L
1
2
*
M
Alarm
if Used
A
120
P28 or P128
*When crankcase heater is used, disconnect jumper from 2 to M
and reconnect from 2 to L.
Figure 5: P28 or P128 Wired for 3-wire Control
(Jumper between 2 and M [or L] must be field
installed.)
P—P28 and P128 Series Lube Oil Controls with Built-in Time Delay Relay Product/Technical Bulletin 5
240V 3-phase
L
L
L
1
2
3
Operating
Control
T
T
T
1
2
3
Motor
240V 3-phase
L
L
L
1
2
Operating
Control
T
T
T
1
2
Motor
Ground
120 or 240V
Supply
Hot
Crankcase
Heater
When Used*
3
1
2
*
Alarm
if Used
P28 or P128
*When crankcase heater is used, disconnect jumper from 2 to M
and reconnect from 2 to L.
Figure 6: P28 or P128 Where Separate Supply is
Provided for Control Circuit (Jumper between
2 and M [or L] must be field installed.)
3
Crankcase
Heater
When Used*
3
3
1
2
Alarm
if Used
P28 or P128
*When crankcase heater is used, disconnect jumper 2 to M
and reconnect 2 to L. Also, make sure that control circuit
transformer has sufficient output for additional load.
Figure 7: P28 or P128 Wired for 440V Supply
and 240V Magnetic Start Coil (Also for 550V
Using Proper Transformer) (Jumper between
2 and M [or L] must be field installed.)
C
2
C
3
Runlight
if Used
240
L
240 or
120V
M
Operating
A
Control
Additional controls
120
in this line only.
240V
440V
C
2
Runlight
C
if Used
3
240
L
M
*
Operating
A
Control
Additional controls
120
in this line only.
Any Voltage
L
L
L
1
2
3
C
4
T
T
T
1
2
3
Motor
440V
3-phase
L
L
L
1
2
3
T
T
T
1
2
3
Motor
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