3
208/240V - 3 Phase - 50/60 Hz
PRESSURE
SWITCH
TIMERRELA
Y
MANUAL
RESET
Timer Checkout
1) De-energize compressor/control circuit. Insert small
screwdriver to hold bellows lever tab down (no pressure
position), see figure 3.
2) Re-energize compressor/control circuit – timer should then
be energized and stop the compressor in the preset time
period. After checkout, the FD113 timer must be reset.
Pressure Checkout
1) To accurately check the operating pressure of the FD113,
the compressor must be de-pressurized, the FD113 “Oil”
and “Low” pressure lines disconnected and a check
performed as outlined in “pressure check” under the
checking and adjusting procedure.
CONTROL CHECKOUT
FIGURE 2—FD113 MOUNTING DIMENSIONS
Contacts below are shown in normal run condition with oil pressure.
Typical Old Copeland 3-Wire Oil Pressure Safety Control Wiring
Manual reset timer contacts. Terminal 21 to 22 closed
during normal run and during time-out – open on time-out.
Terminals 21/24 (signal) closed after time-out.
Power to Timer thru pressure switch contacts. During normal run,
11/14 closed for “safe light” circuit. On loss of pressure, 11/14 open
and timer is energized for time delay period until trip-out.
FIGURE 4
FIGURE 3
*
Optional Current Sensing Relay
in Series with N/T1 line
for compressors with internal line break motor protectors.
(Prevents oil pressure safety control from tripping when internal
line-break motor protector trips.)
FIGURE 5
TIMER
RESET
BUTTON
