Switch Definitions
NO:
Connected to a Normally Opened Circuit
NC:
Connected to a Normally Closed Circuit
24V:
Connected to a 24V Circuit
:
Connected to a
non-powered circuit.
Pre-installation checklist
Installing the Dry Contact Sensor
❶
Before you begin, turn off power to the equipment
we are monitoring.
❷
Identify the type of float switch for the HVAC unit
in the “Wiring Diagrams” section.
Wiring diagrams
Monitoring the R-wire with float switches
wired between the HVAC control board and
the thermostat
❶
Turn off power to the HVAC unit.
❷
Install or locate the existing float switches.
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