Wiremold ZA277Y Installation Manual

ZONESENTINEL® SERIES

AC Panel Transient Voltage Surge Suppressors

Installation

Instructions

& User Manual

INTRODUCTION

This document explains how to install the ZoneSentinel® Series
of AC Panel Surge Protective Devices.

INSTALLATION INSTRUCTIONS

Warning: Terminals marked L1, L2, L3, N, GND (where relevant)

must be connected respectively to phase(s) neutral and ground.
Failure to comply may result in danger or damage. See correspond­ing diagrams for proper connections.

INSTALLATION DESCRIPTION

ZoneSentinel® units are connected in parallel (or in “shunt” across)

the supply to be protected. The connecting cable does not carry
the supply current, only the current associated with suppressing
the transient overvoltage.

MOUNTING

The units should be mounted as close as possible to the panel to be
protected. See Connecting Lead lenghts on page 4. Conduit, prefer­ably metallic, is to be installed from the suppressor to the panel.
Drill holes in the ZoneSentinel® enclosure only in the designated
areas as shown in recommended cable dressing illustrations (page

5). Mount the unit in the appropriate location using the mounting
holes provided on the enclosure.

2

OVERCURRENT PROTECTION

The ZoneSentinel® can be installed on electrical services without
overcurrent protection if the available SCCR is 100k AIC or less. If
the SCCR is greater than 100k AIC, coordinated overcurrent protection
(30-60A) must be installed.

FLUSH MOUNT

The fl ush mount ZoneSentinel® is installed into a suitably sized hole in
the wall. Remove the four snap-in screw covers and remove the cover,
temporarily disconnect the cover ground wire. Choose a location such
that the recessed part of the ZoneSentinel® enclosure can be fi xed to a
wall stud or suitable upper or lower support. Be sure that the ZoneSen-
tinel® enclosure is fl ush with the wall. Follow the standard instructions
for location and connecting leads. Reconnect the cover ground wire and
install the cover plate. Replace the four snap-in screw covers.

INCORRECT INSTALLATION WILL IMPAIR THE EFFEC­TIVENESS OF THE AC PANEL PROTECTORS. Particularly

important is the length of the connecting leads (page 4).

CONNECTING LEADS

Connect the suppressor as shown in the installation diagram.
Refer to page 5 for recommended cable dressing. Connect the
terminals within the suppressor to the load side of 30A breakers
within the panel.

RECOMMENDED WIRE GAUGE

Minimum of 10 AWG
Maximum of 4 AWG ( for ease of dressing)

LENGTH OF CONNECTING LEADS

The longer the connecting leads between the ZoneSentinel® and
power panel, the higher the residual transient
voltage.

RECOMMENDED MAXIMUM: 19” (500mm)
IDEALLY: 10” (250mm)

Each 10” (250mm) increase in cable length; increases clamping
voltage by 25V per 1000A surge current discharged.

• BIND THE PHASE NEUTRAL AND GROUND
CONDUCTORS TIGHTLY, OVER THE ENTIRE RUN
FROM THE SUPPRESSOR TO THE SERVICE PANEL.

• ALWAYS USE THE SHORTEST LENGTH OF
CONNECTING CABLE POSSIBLE.

4

RECOMMENDED CABLE DRESSING

DIMENSIONS

5

STATUS INDICATORS

The ZoneSentinel® units have comprehensive, continuous visual status
monitoring present on each module.

Power/Protection

Indicator

Status Full Reduced No No Power to High N-G

Indicated Protection (Standby) Protection Protector Voltage*
Present Protection

LED Green Red Red Green Red & Green
Indicator LED Lit LED Lit LED Lit LED Out LED Lit

REMOTE INDICATORS

A remote indication of the reduced protection state is available as a nor ­mally open or normally closed dry contact.

Pluggable Connector

Customer

supplied wires

Common

Normally Closed

Normally Open

End view of
ZoneSentinel Module

*WARNING:

OF HIGH NEUTRAL TO GROUND VOLTAGE

On certain models, if both Red and Green lights are on, consult a qualifi ed
electrical contractor to check the integrity of the building wiring.

6 3

ZONESENTINEL

and Schematic Connection Diagrams

120/240V SPLIT PHASE 3W

®

Confi guration

ZONESENTINEL

and Schematic Connection Diagrams

120/208V THREE PHASE 4W WYE
240/415V THREE PHASE 4W WYE
277/480V THREE PHASE 4W WYE
220/380V THREE PHASE 4W WYE

®

Confi guration

7

MAINTENANCE

At intervals not exceeding two months, check:

1. Status indication lights

2. Conditions of connecting cables and terminals

Module Replacement

WARNING: Before opening the access panel, ensure

that the AC supply has been disconnected.

Unplug the remote contact connector at the top of the module.
Remove the mounting nuts at the top and bottom of the module.
The protection module can now be removed.

WARNING: Replace the defective module with a module

having the same model numbers.

Installation of the replacement module is the reverse of the above
procedure. Final step, check that all cable connections are secure
and nuts are tightened. Do not overtighten.

NOTE: No customer serviceable parts inside. Opening
module WILL void Warranty

The Wiremold Company

In US:

60 Woodlawn Street, West Hartford, CT 06110
800-621-0049 FAX [phone]
Outside U.S.: 860-232-6251

In Canada:

Patented No. 5, 311, 393

801400 Rev. D 6/06/08

850 Gartshore Street, Fergus, Ontario N1M 2W8
[phone] FAX [phone]