VariTrac Installation
The drawing shows the VariTrac system you will install in this workshop. you will
complete the power wiring and communications link. Then startup the system.
Install VariTrac UCMs and digital zone sensor
Reference: VariTrac Installation Manual (VAV-SVN03A-EN), Pages 23 through 27
1. Set the address DIP switches on each of the UCM boards to addresses 1, 2, and 3.
2. Connect UCM Comm4 wiring to terminalsTB2-1 and TB2-2, TB2-3 and TB-2-4 on each UCM
using the pre-configured wiring harness provided.
Important! Polarity must be observed at comm link connections on all devices that share the
Comm4 link.
3. Connect 24Vac power to terminals TB1-1 (24V) and TB-2 (ground) on each UCM using the
pre-configured wiring harness provided.
03- VariTrac Installation Workshop.doc 3-2
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