Control Board Features - St. Croix SCF-Revolution Installation & Operation Manual

The Control Board controls all functions of
the furnace by monitoring sensors that are in
the system. These sensors serve 2 purposes.
a. General Operation of the Furnace.
b. Safety Features, to shut the unit
down in the event the sensors detect
a problem in the unit.
The Control Board also has Diagnostic
Capabilities to help in diagnosing 3 areas in
the furnace. These areas are:
1. High Temperature Limit.
2. Proof of Fire Sensor
3. Vacuum in the Firebox
A closer look at the Control Board to the
right in figure 17 will explain how the board
works. There are essentially 4 buttons on the
control board. Two of these buttons, the
Heat Level and Trim Buttons, have a
High/Low side to advance these settings up
or down. There is a slide switch that controls
the Thermostat Mode and an LED Light bar
that indicates which of the 5 Heat Settings
the Furnace is running on.
The LED Light bar is also used during the
Diagnostic process, see page 38 for more
details.

Control Board Features

SCF-Revolution Manual
29
Figure 17