3 | PIR Ready VT76x7 Series-Installation Guide
11. Gently push excess wiring back into hole (fig. 3).
12. Re-Install wiring terminals in their correct locations (fig. 3).
13. Re-install the cover (top side first) and gently push extra wire length back into
the hole in the wall.
14. Install security screw.
T
HEORY OF OPERATION
The VT7600 uses a Viconics proprietary adaptive logic algorithm to control the space
temperature. This algorithm controls the heating / air conditioning system to minimize
overshoot while still providing comfort. It provides exceptional accuracy due to its unique
PI time proportioning control algorithm, which virtually eliminates temperature offset
associated with traditional, differential-based on/off Terminal Equipment Controllers.
Fig.2 - On/Off mechanical control vs. PI electronic control.
If replacing an existing Terminal Equipment Controller, label the wires
before removal of the Terminal Equipment Controller.
Electronic controls are static sensitive devices. Discharge yourself
properly before manipulating and installing the Terminal Equipment
Controller.
A short circuit or wrong wiring may permanently damage the Terminal
Equipment Controller or the equipment.
All VT7000 series Terminal Equipment Controllers are designed for use
as operating controls only and are not safety devices. These instruments
have undergone rigorous tests and verification prior to shipping to ensure
proper and reliable operation in the field. Whenever a control failure
could lead to personal injury and/or loss of property, it becomes the
responsibility of the user / installer / electrical system designer to
incorporate safety devices (such as relays, flow switch, thermal
protections, etc…) and/or an alarm system to protect the entire system
against such catastrophic failures. Tampering with the devices or
unintended application of the devices will result in a void of warranty.
