VAV-SVN03A-EN
42
VariTrac Dampers
o
UCM dampers mounted and secure according to recommendations.
Zone Temperature Sensors
o
Sensors are properly mounted and wired per instructions and in the
correct space.
UCM Wiring
o
UCM power is properly wired to TB1-1 and TB1-2.
NOTE: TB1-2 is COMMON (case ground) if grounded secondary transformers are
being used. Confirm polarity from one UCM to the next if more than one UCM is
being powered from a single transformer.
o
Confirm voltage present between 20 Vac and 28 Vac.
o
Ensure that the sensor is properly terminated.
o
If optional local heat is being used, confirm wiring per appropriate
diagram.
Communication Link Wiring
o
Field installed communications wiring complies with all applicable codes.
o
VariTrac Central Control Panel communication link wiring to UCMs is
connected at TB2-10, TB2-11, and TB2-12 on the CCP.
o
Communication link wiring is properly terminated at each zone damper
UCM on terminals TB2-1 through TB2-6. Ensure that polarity (+ -) has
been maintained through the link.
o
Communication link wire shields spliced at each device junction and
taped to prevent contact with earth ground.
Installation Checklist
