Start/Stop Levels - Watts AERCO Edge CFR 3000 Operator's And Service Manual

SECTION 3 START SEQUENCE
d) If no spark is present 3 seconds into the ignition trial, the Controller aborts the Ignition Cycle and
shuts down the boiler. Refer to SectionSECTION 9 in this guide for guidance if this occurs.
7. Up to 4 seconds are allowed for ignition to be detected. The ignition circuit is turned off one second
after a flame is detected.
8. After 2 seconds of continuous flame, the flame strength is indicated. After 5 seconds, the Unit
Status screen appears.
9. With the unit firing properly, it will be controlled by the temperature control circuitry. The boiler's
fire rate or valve position (depending on which was chosen in Section 4.2.2: Front Panel
Configuration of the Edge Controller Manual, OMM-0166) will continuously display on the
Controller's bar graph.
10. Once demand for heat is satisfied, the Edge Controller will turn off the SSOV gas valve. The blower
relay will be deactivated, and the Air/Fuel Valve will be closed. Standby is displayed.

3.3 Start/Stop Levels

The start and stop levels are the Air/Fuel Valve positions (% open) that start and stop the unit, based on
load. These levels are Factory preset as follows:
TABLE 3-1: Start/Stop Levels – NATURAL GAS
Start Level
Stop Level
Ignition Position
Normally, these settings do not require adjustment.
NOTE: The energy input of the boiler is not linearly related to the Air/Fuel Valve position.
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Figure 3-4: Air/Fuel Valve in Ignition Position
Level
•
CFR 3000
30%
25%
25%
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