SPECIFICATIONS
FAILED FLAME SENSE/TRIAL FOR IGNITION
When the pressure switch closes and a
1.As spark voltage is supplied to the ignitor elec- trodes, the gas valve opens and this causes the burners to ignite.
2.The ignition control continues to energize spark voltage until a flame sense signal is supplied to the flame terminal on the ignition control.
3.If a flame sense signal is not received at the flame terminal on the ignition control, the spark igni- tion cable terminal remains energized for 10 seconds.
4.After the
5.Once the
6.After the spark ignition cable terminal
7.After
8.If the flame sense signal is not received, the system goes through three trials following the above sequence.
9.After three trials, the system goes into lockout and only the limit switch circuit and pressure switch circuit remain energized during the
10.If the flame sense is lost during the heat cycle, the gas valve
FAN ON
1.When the thermostat is switched to the “FAN ON” position, the
2.The
3.L1 power is sent to the circulating air blower terminal block, causing the circulating air blower to run in cooling speed.
4.The circulating air blower continues to run in cooling speed until the thermostat is switched to “AUTO”, interrupting the
Note: With the thermostat in the “FAN ON” position during heat call, ignition control will not energize the heat speed relay. The circulating air blower continues to run in cooling speed unless the limit switch circuit opens, which would cause the heat speed relay and the induced draft blower relay to become energized. This would
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