Controller overview – Orion System HB Mini User Manual
Page 3
HB Mini Controller
3
Technical Guide
General
The HB Mini Controller is designed to work with a normal 24 VAC
Thermostat. Single or Multi-stage Thermostats can be used. When a
Single Stage Thermostat is used, an auto-staging feature is built-in for
Multi-stage HB units.
The HB Mini Controller also monitors equipment safeties, logs infor-
mation and locks out the equipment in the event of multiple failures.
Terminal block style connections are provided for field wiring of the
Thermostat. All other inputs and outputs are connected via a wiring
harness on the HB unit. A list of all available inputs and outputs fol-
lows.
Inputs
G, Y1, Y2, W1, W2, W3
Outdoor Air Temperature Sensor
Heat Safety Monitor (monitors main and auxiliary limit thermostats)
High Pressure Switch
Low Pressure Switch
Clogged Filter Switch
Controller Overview
Outputs
Supply Fan High Speed Relay
Supply Fan Low Speed Relay
Cool-1 Relay
Cool-2 Relay
Heat-1 Relay
Heat-2 Relay
Heat-3 Relay
C1, C2: Clogged Filter Switch 24 VAC Output Terminals
Figure 1: HB Mini Controller Dimensions
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