Operation:
One leg of a 24 VAC transformer secondary supplies voltage to the common terminal of a SPDT (single-pole,
double-throw) relay. The NC (normally closed) terminal of that relay is connected to the red wire of the JVA cord,
and the NO (normally open) terminal is connected to the white wire of the JVA cord. The completion of the circuit
is through the black (common) wire of the JVA cord.
When the coil of the SPDT relay is de-energized, voltage is supplied from one leg of the transformer secondary
to the common terminal of the relay and then down the red wire of the JVA cord to the toggle switch at the rear
of the JVA. The toggle switch then routes the voltage to either the lower microswitch (toggle in AUTO 1 position),
the upper microswitch (toggle in AUTO 2 position), or to neither microswitch (toggle in OFF position). If the voltage
is routed to the lower microswitch, and that microswitch is closed, the voltage passes through the motor to the
black wire and then back to the other leg of the transformer secondary to complete the circuit. The motor will then
rotate clockwise, turning the gear train (and ultimately the output shaft) until the lower cam comes in contact with
the lower microswitch, which opens the circuit and stops the motor. If the voltage is routed to the upper microswitch,
the motor rotates in the opposite direction until the upper cam lobe comes into contact with the upper microswitch,
which stops the rotation.
If the coil of the SPDT relay is energized, the voltage travels through the white wire to the toggle switch, which as
above, routes it either to the lower microswitch for clockwise rotation or upper microswitch for counterclockwise
rotation, with the voltage traveling back the black wire to complete the circuit.
The capacitor, which is wired in parallel with the motor, keeps the motor rotating in the correct direction and
insures the JVA rotates with the proper torque.
JVA
pecifications:
Volta
e: 24 VAC
Ampera
e: 1.0 AMPS
Torque: 180 in/lbs.
Rotation Time: 34 sec. for 180 de
rees
Motor Type: Synchronous - Bidirectional
AquaLink
®
RS Troubleshooting
5 Jandy Valve Actuators
8
Toggle Switch
(on-off-on
D.P.D.T.)
otor
24 VAC
Lower Microswitch
(clockwise rotation)
Upper
Microswitch
(counter-
clockwise
rotation)
common
normally
closed
Capacitor
35UF - 150V
black
red
white