Introduction; What Is A Vvt Bypass Ii - Carrier VVT Bypass II Installation And Startup Manual

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Introduction

The VVT Bypass II (#OPN-VVTBP-02), a component of the i-Vu® Control System, regulates the supply duct static

pressure by controlling one of the following:

•

The system's bypass damper

The controller's damper actuator provides 45 in/lbs (5 Nm) of torque. If the actuator's torque is insufficient,

the VVT Bypass II can be used to drive an external high-torque actuator. Or, the controller can drive multiple

external damper actuators.

•

The air source supply fan's variable frequency drive (VFD)

NOTE The VVT Bypass II controller is available in both English or Metric units. The metric version has (-M)

appended to the part number. Everything in this document applies to both versions.

The i-Vu Control System uses linkage to exchange data between the zone terminals and their air source to form a

coordinated HVAC system. The system's air source controller, zone controllers, and bypass controller are linked so

that their data exchange can be managed by one zone controller configured as the VVT Master.

You can disconnect the actuator from the controller and mount them separately, connecting them with just the

actuator cable or using an additional extension cable, up to a maximum distance of 300 feet.

The following illustration shows the VVT Bypass II in a typical i-Vu® Control System.

VVT Bypass II Controller

Installation and Start-up Guide

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