connection close after 5 seconds.
56.The stage 4 temperature controller contacts close.
57.Power is sent to gas valve 4.
58.The heater is now operating at full fire.
Ignition Module
Reset button on
The standard ignition module will attempt to light three times before locking out. To reset it, turn off power to the heater, wait 30 seconds and
The optional
High Limit (Manual Reset)
Fig. 28: Ignition Module
When additional heat is needed, the combustion air blower starts to purge air from the combustion cham- ber for about 15 seconds. On
| Code | Condition |
|
|
|
|
|
| On | System OK; |
|
| No faults present |
| |
|
|
| |
|
|
|
|
| Off | Possible control fault; |
|
| Check power |
| |
|
|
| |
|
|
|
|
| 1 Flash | Low air pressure, brief |
|
| flashing normal on |
| |
|
|
| |
|
|
|
|
| 2 Flashes | Flame in combustion |
|
| chamber; No call for heat |
| |
|
|
| |
|
|
|
|
| 3 Flashes | Ignition lockout |
|
|
|
|
|
| 4 Flashes | Low igniter current |
|
|
|
|
|
| 5 Flashes | Low 24 VAC, check control |
|
| supply voltage |
| |
|
|
| |
|
|
|
|
| 6 Flashes | Internal fault; |
|
| Replace module |
| |
|
|
| |
|
|
|
|
Table O: Ignition Module Diagnostic LED Codes
Fig. 29: High Limit (Manual Reset)
The heater is equipped with a manual reset high limit temperature device. Push the reset button and adjust the setting to 40 - 50°F above desired operating tem- perature.
Flow Switch
Fig. 30: Flow Switch
This
Operating Control
The heater may be equipped with different types of operating controls. Consult the individual control data
37