PNEG-1499
Digital High/Low Thermostat
15
5. Programming
Programming Set Point Values
Programming can be done anytime that the thermostat control is receiving power, even when the
heater is in operation.
1. Press the SET key once to set temperature scale mode. Use the UP or DOWN arrow key to toggle
between F for degrees Fahrenheit or C for degrees Celsius.
2. Press the SET key again to access the Stage 1 set point. “S1” will blink on the screen. Press the
UP arrow to increase or the DOWN arrow to decrease the set point to the desired temperature.
Cycle Set Point
-
If the plenum temperature increases above this point, the flame is reduced to
“Low Flame”.
3. Press the SET key again to access the Stage 1 differential. “DIF1” will blink on the screen. Press the
UP arrow to increase or the DOWN arrow to decrease the differential to the desired setting.
Temperature Differential 1
-
If the flame shuts off because the temperature is greater than the Cycle
Set Point, then the temperature must fall below (Set Point minus Temperature Differential) for the
flame to come back ON. Heater will resume high flame operation.
4. Press the SET key again to access the Stage 1 heating. “H1” should appear on the screen. This must
read “H1” for the heater to operate correctly. If not, use the arrow keys to scroll through the values
until the screen reads “H1”.
5. Press the SET key again to access the Stage 2 setpoint. “S2” will blink on the screen. Press the
UP arrow to increase or the DOWN arrow to decrease the set point to the desired temperature.
High Limit Set Point
-
If the plenum temperature increases above this point, the flame is shut off -
“OFF Cycle”.
6. Press the SET key again to access Stage 2 differential. “DIF2” will flash on the screen. Press the
UP arrow to increase or the DOWN arrow to decrease the differential to the desired setting.
Temperature Differential 2
-
If the flame shuts off because the temperature is greater than the High
Limit Set Point, then the temperature must fall below (Set Point minus Temperature Differential) for
the flame to come back ON. Heater will resume low flame operation.
7. Press the SET key again to access Stage 2 heating. “H2” should appear on the screen. This must
read “H2” for the heater to operate correctly. If not, use the arrow keys to scroll through the values
until the screen reads “H2”.
8. Press the SET key again. This will end programming.
The Thermostat Control will automatically end programming if no keys are pressed for a period of
30 seconds. Any settings that have been input to the control will be accepted at that point.
All control settings are retained in memory. Re-programming is not necessary after power outages
or disconnects unless different control settings are required.
The temperature differentials can be set from 1-30°. It is recommended that these temperature
differentials be set in the range of 10-15 °F for high temperature units and 1-5 °F for low
temperature units.
