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TURBOPOWER 99
WATER HEATER
PV500-12 08/12 16
11 TEMPTRAC™ ELECTRONIC CONTROLLER PANEL
11.1 Principle Of Operation
The water heater operates to satisfy the setpoint of the TempTrac digital control whose sensor is located near
the top of the water heater tank. Demand (flow) will typically create a drop in temperature, thus activating the
water heater to add heat to the stored water. This setpoint is the desired water temperature to maintain.
11.2 Lower LED Readout
The default display of the lower readout (Probe 1) is the stored water temperature sensed near the top of the
water heater tank. This is used to regulate the temperature of the water heater.
11.3 Upper LED Readout
The default display of the upper readout (Probe 3) is the flue gas temperature exiting the heater. This readout
may also display a temperature reading from Probe 2. Probe 2 can be installed in a thermal well (this optional
probe and thermal well, with heat conductive paste, is custom and must be ordered from your PVI representative
or directly from PVI) to remotely monitor water temperatures, such as blended water temperature, downstream
of a thermal mixing valve or a remote storage tank. All the probes temperatures are available for monitoring
through the optional MODBUS RTU interface.
11.4 Control Buttons
SET
Displays and modifies the temperature set points.
In programming mode, it selects a parameter or confirms an operation.
UP
When held for 3 seconds, displays and modifies the energy saving (Night Time setback)
settings.
In programming mode, it browses the parameter codes or increases a displayed value.
DOWN
When held for 3 seconds, displays the working hours of the load relays.
In programming mode, it browses the parameter codes or decreases a displayed value.
CLOCK
Changes lower display from the stored water temperature to current time and day.
EXT
Changes upper display from Probe 2 temperature to Probe 3 temperature (when installed).
Also displays the temperature difference of the stored water temperature minus Probe 2
temperature. When held for 3 seconds, will put you in manual mode for setting 4-20mA
output used in startup (password is required).
ON/OFF
Switches the control ON or OFF. The BAS can still monitor the probe temperatures.
Appliance will not heat when in the off-state.
(See TempTrac User Manual PV500-40 for full description)