Dwyer SVT - Manual (Page 3)

The SVT can be expanded up to 60 valves with the use of the
SVTE expander module. A maximum of 9 SVTE can be daisy
chained to the SVT. The SVT will automatically detect the
expander modules and make their valves available. See Figure
2 for wiring.
System Setup
On-Demand Cleaning / Down-Time Cleaning / Test
The SVT controls (dip-switch, 2 potentiometers) are accessed by
removing the transparent plastic cover.
The On-Demand Cleaning / Down-Time Cleaning and Test /
Normal Operation are set with the four pin dip switch. Dip switch
one changes the cleaning function. Down-time cleaning will start
when the circuit between pin 3-4 is opened/closed, when the
circuit opens/closes the system will complete 5 cycles, then shut
down. On-demand cleaning will start when the circuit between
pin 3-4 is closed and stop cleaning when the circuit
opens/closes. All cleaning cycles start the subsequent channel
where the last cleaning cycle left off. Dip switch 2 changes the
type of circuit required to start the cleaning function. Dip switch
4 controls a test function. Dip switch 3 is not used. See Figure 3.
Time Off and Time On Setup
Time off defines the period of time between solenoid activations.
This function has 15 settings ranging from 4 seconds and 210
seconds. Time on defines the solenoid on time. This function
may be set between 150 msec and 700 msec. If adjustments are
made while the system is in operation, the new setting will take
effect in the following solenoid cycle. Do not use excessive force
to turn the potentiometers, this will damage the unit. See Figure
3.
POWER SUPPLY
PRESSURE
SWITCH
CONNECT
ONLY GROUND
Figure 2