PVI Industries PV500-40 User Manual

Page 3

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PV500-40 04/2013

1.4 UPPER

LED

READOUT

The default display of this readout is the temperature sensed at Probe 2. Probe 2 may display the tank stored water

temperature, outlet water temperature, flue gas temperature, ambient temperature, remote tank or blended water
temperature, etc., depending on the product and application. Refer to your specific water heaters Installation and
Maintenance Manual and the supplied wiring drawing. The upper LED readout can also be switched to display
Probe 1 or 3 (if used) or the modulation % or the temperature difference between Probe 1 and 2. If Probe 2 is not
utilized, the display will show “nu”.

By pressing and releasing the

button once, the Upper LED will display the actual temperature sensed at

Probe 3. Probe 3 (if used) may display the flue gas temperature or outside ambient temperature, etc.,
depending on the product and application.

By pressing and releasing the

button again, the Upper LED will display the modulation % (indicated by 0 to

100%). If the product is a non-modulating product, the displayed value should not be considered.

By pressing and releasing the

button a third time, the Upper LED will display the difference between the

temperature sensed at Probe 2 (if used) and the temperature sensed at Probe 1.

To return to the default in the Upper LED readout, press the

button to cycle back to the Probe 2

temperature.

All of the display information described above is available for monitoring through the optional MODBUS RTU

interface.

1.5

LOWER LED READOUT

The default display of this readout is the temperature sensed at Probe 1. Probe 1 will be inserted into the

appropriate area of the storage tank to provide effective temperature response for the heat source (this may not
be at the top of the tank). Refer to your specific water heaters Installation and Maintenance Manual and the
supplied wiring drawing. The lower LED readout can also be switched to display Probe 2 or 3 (if used) or the
modulation % or the Time of Day.

By pressing and releasing the

button once, the Lower LED display will show the Time of Day. Press again

to return to default display.

1.6

TO SET THE CURRENT TIME AND DAY (MILITARY TIME)

1. Push and hold the

button for more than 3 seconds. The

LED icon starts flashing and the “Hur” (hour)

parameter name is displayed in the Upper LED readout, its value is displayed in the Lower LED readout.

2. Pushing

the

button alternates the LED readouts between the following:

 “Hur” (hour) in the Upper readout and its value in the lower readout

 “Min” (minute) in the Upper readout, its value in the Lower readout

 “dAY” (day) in the Upper readout, its value in the Lower readout

3. To adjust a value, press the

button and the value in the Lower LED will start flashing. Change the value by

pressing the

buttons. When correct, press

4. To exit push

or wait 15 seconds without pressing any buttons.

Note: This device recognizes Sunday as the first day of the week and Saturday as the last.