Viconics VC3000 User Manual

VC 3000 Series
Line Voltage Switching
Relay Pack Controllers

Installation Guide

For Commercial and Lodging HVAC

Fan Coil Applications

May 3rd, 2012 / 028-0296-R6

CONTENTS

Installation 2
Communication Wiring to VTR73xxA 4
Terminal Equipment Controller 4
VC3xxx LED Operation 5
Wiring of Remote Inputs to VC3504E and VC3404E 6
Model Chart 7
Terminals, Wire Identification & Ratings 8
Typical Wiring Example 9
Specifications 9
Dimensions 10
Important Notice Error! Bookmark not defined.

1 VC7300 Series-Installation Guide

INSTALLATION

IMPORTANT: ALL WIRING MUST CONFORM TO LOCAL
AND NATIONAL ELECTRICAL CODE REGULATIONS.

Please read the following instructions carefully before proceeding with the
installation. Failure to follow the instructions could damage the product or
cause a hazardous condition. Installation must be performed by a qualified
service technician or electrician. Disconnect power supply before installing in
order to prevent electrical shock.

There are three basic methods for installing the VC3000 transformer relay pack controller.

A) Inside an electrical cabinet of a fan coil unit

• Use the plastic mounting tabs to secure the unit to the inside of the electrical enclosure.

• Secure to the inside with screws.

• Cut one or both plastic mounting tabs if space is needed inside the enclosure.

• Install a low voltage or high voltage metal separator if required.

• Do not exceed the maximum rated temperature of the unit. (50 °C/122 °F)

2 VC7300 Series-Installation Guide

B) Outside of a junction box or electrical cabinet

 If replacing an old line voltage fan coil controller, label the wires

before removal of the old controller.

 Electronic controls are static sensitive devices. Discharge yourself

of any electrostatic build-up before manipulating or installing the
terminal equipment controller.

 A short circuit or wrong wiring may permanently damage the

terminal equipment controller or the equipment.

 VC3000 series transformer relay packs are to be used only as

operating controls. If installed incorrectly the intended application may
fail or lead to personal injury or loss of property. It is the responsibility
of the end user to ensure that the device has been properly installed
by a certified professional and that proper safety precautions have
been taken to protect against failures.

• Use the supplied lock nut to secure the transformer relay pack to the electrical junction
box or to the electrical cabinet of the fan coil unit.

C) Enclosed low voltage junction box type installation (if required by local codes)

• Install the transformer relay pack inside a 4”x 4” junction box.

• Cut one or both plastic mounting tabs if space is needed inside the enclosure.

• Use the supplied lock nut to secure the transformer relay pack (inside its junction box) to

the main electrical junction box or to the electrical cabinet of the fan coil unit.

3 VC7300 Series-Installation Guide