Controller sequence of operation – Orion System HB Mini User Manual
Page 4
Technical Guide
HB Mini Controller
4
Fan Mode
The HB Mini Controller controls the 2 Speed Supply Fan . On a call for
"G" the Supply Fan runs at Low Speed. Minimum on and off times are
maintained in the event of a short cycled call for "G".
Heating Mode
On a call for "W1" the Supply Fan runs at High Speed (maintained
during the Heating mode) and Heat Stage 1 is energized. On a call for
"W2", Heat Stage 2 is energized after the stage up delay. If "W2" is
called without "W1", Heat Stage 1 is energized and then Heat Stage 2 is
energized after the Auto Stage Up Delay period. On a call for "W3",
Heat stage 3 is energized after the Stage Up delay. If "W3" is called
without "W1" or "W2", Heat Stages 1, 2 and 3 will energize based on
Auto Stage Up Delays.
Cooling Mode
If the HB Mini Controller is configured for 1 stage of Cooling, on a call
for "Y1" the Supply Fan runs at High speed and Cool Stage 1 will
energize. If the HB Mini Controller is configured for 2 stages of Cool-
ing, on a call for "Y1" the Supply Fan runs at Low Speed and Cool
Stage 1 is energized. On a call for "Y2" the Supply Fan runs at High
Speed and Cool Stage 2 is energized after the Stage Up Delay. If "Y2"
is called without "Y1", Cool stage 1 is energized and then Cool stage 2
is energized after the Auto Stage Up Delay.
Lockout Modes
Heating Mode is locked out if the HSM (Heat Safety Monitor) trips 3
times during a call for Heating. To reset the lockout condition, either
remove the call for Heating or cycle power to the HB Mini Controller.
Heating Mode is also locked out if the Outdoor Air Temperature is above
the OAT Heat Lockout setpoint temperature.
Cooling Mode is locked out if the LPS (Low Pressure Switch) trips 3
times during a call for Cooling. To reset the lockout condition, either
remove the call for Cooling, or cycle power to the HB Mini Controller.
Cooling Mode is also locked out if the Outdoor Air Temperature is
below the OAT Cool Lockout setpoint temperature or if the OAT Sen-
sor is bad or missing.
Controller Sequence Of Operation