Tracer Uc600 Pre-Power Checks; Resistive Inputs; Voltage Inputs - Trane Tracer UC600 Installation Manual

Tracer UC600 Pre-power Checks

To avoid equipment damage, a pre-power check for inputs and outputs is recommended before
applying power to the Tracer UC600. Before applying power, check for the following:
•
•
•
•
This section provides illustrations and methods of how to check the Tracer UC600 points before
connection has been made and power applied. The step numbers in each illustration correspond
to the information in each table.

Resistive Inputs

Checkout
Procedure
Step 1
Step 2
Step 3

Voltage Inputs

The sensor senses the voltage and is powered.
8
All thermistors; check for resistance by using a digital multimeter (DMM). At room
temperature, the resistance reading will be approximately 11 kΩ for a Trane thermistor.
Thumbwheels; range between 189 Ω and 890 Ω.
Binary outputs; check for any shorts.
Analog outputs; verify that AC voltage is not present and that the load does not have 24 Vac
or 120 Vac.
Measurement
Measure AC voltage across the resistive
termination.
Measure DC voltage across the resistive
termination.
Measure the resistance across the resistive
termination.
Expected Value
Vac » 0.0 V AC voltage will affect further
measurement.
Vdc » 0.0 V DC voltage will affect further
measurement.
Compare the measured resistance with the
expected value based on the manufacturer's
specification and current conditions.
BAS-SVP042A-EN