User manual

Chapter 3: Configuring your SEC-HD Phason
24
Configuring relay stages, parameters 21 to 23
The SEC-HD has three relay stages you can configure as one of the following options.
 Off: the relay is always open (OFF).
 On: the relay is always closed (ON). You can use this configuration as an override.
 Cool: the relay controls a cooling element and is on when the temperature is above the set point.
 Heat: the relay controls a heating element and is on when the temperature is below the set point.
 Proportional cool (stage 5 only): the relay controls a water pump or sprinkler solenoid and
operates as a proportional cycle timer. The relay switches on for a portion of the cycle/interval
and off for the remainder. The duration the relay is on depends on the temperature.
Proportional control provides better control of temperature and more efficient operation.
Typical use for proportional cooling is soaking or direct evaporative cooling, which is often used
in hog and dairy operations.
 Proportional heat (stage 5 only): the relay controls a pump or valve and operates as a
proportional cycle timer. Typical use for proportional heating is in-floor heating using water
pipes, which is often in livestock buildings.
Defaults: stage 3 and 4 COOL, stage 5 HEAT
 If you need to connect more cooling elements than you have relays available,
and you are not using both variable stages, you can use an available variable
stage as an ON/OFF stage (for 120/230 VAC-powered equipment only). For
more information, read Programming variable stages, parameters 2 to 9 on page
30.
 Use the Relay stages worksheet on page 58 when configuring relays.
To configure relay stages
1. Press Program until
( 0 N f
displays and then press Select.
The display shows
17
, the first item in the Configuration menu.
2. Press Up until
21
displays for stage 3 (
2 2
for stage 4, or
23
for
stage 5) and then press Select.
The display shows the current configuration.
3. Press Up or Down until you reach the option you want and then
press Select.
The control returns to the Configuration menu.
4. To return to the Main menu, press Back once. To return to the
Main display, press Back twice.
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