10
Condensing PV Series
10
Power Up Sequence
1. Start Up.
Upon power up, the control runs a safe-start check with a typical start-up delay of 5
seconds.
2. Flammable Vapor.
To assure no outputs are energized if the “Simulated Resistive Device”, is out of
range, the control will test the “Simulated Resistive Device” for proper operating
range. If “Simulative Resistive Device” is out of range, the control LED immediately
flashes 7 times with a 3 second pause.
Normal Heating Sequence
1. Thermostat calls for heat.
Prior to energizing the blower, the gas control checks the safety circuit to insure that
the circuit is open. Normal switch positions in the safety circuit are as follows:
a) Pressure switch normally open.
b) Blower temperature switch normally closed.
If the safety circuit is closed, the control waits 4 seconds, then the gas
control LED flashes 2 times with a 3 second pause. The gas control waits 2
minutes and then the blower runs for 30 seconds. This cycle repeats until
the safety circuit opens.
2. Blower energizes.
3. Pressure switch proves blower/vent system operation.
If the pressure switch does not close within 30 seconds, the control LED flashes 3
times with 3 second pause. The blower runs for 30 seconds every 2 minutes trying
to get the pressure switch or blower temperature switch to close. This cycle repeats
as long as there is a call for heat.
4. Blower pre-purge period (2 seconds).
5. Trial for pilot ignition (90 seconds).
a. The gas control lights the pilot by activating the spark igniter and gas flow to
the pilot burner.
b. If the flame is not sensed within 90 seconds, the igniter and gas flow are
deactivated, the blower will post purge and the control LED flashes 6 times
with a 3 second pause.
6. Main burner ignition.
After the pilot flame is sensed, the gas control activates the main valve for main
burner ignition. The gas control will ignore the flame and pressure switch signals
for 3 seconds allowing for the main burner to stabilize.
