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• Priority 3 and 4 have connections for one contactor only.
• Four LEDs, located on the load shed module, will indicate when

a load priority level is enabled.

• Any loads, including central air conditioners, can be controlled

via a contactor that must be purchased separately. Up to four

contactors can be controlled by the load shed module. The LSM

supplies the 120 Vac to energize each contactor coil.

• Generator overload condition is determined by generator fre-

quency. Loads are shed when the frequency is <58Hz for 3

seconds or <50Hz for ½ Second (For 60Hz).

The LSM has a Test button which forces the unit to act as if an

overload has occurred. This button operates even when the trans-

fer signal is inactive.

Figure 1.2 — Load Shed Module

0 Ground

194 +12V

23 Transfer

NEUTRAL

AIR 1

AIR 2

CONTACTOR

Priority 1

Priority 2

Priority 3

Priority 4

0 Ground

194 +12V

23 Transfer

NEUTRAL

AIR 1

AIR 2

CONTACTOR

Priority 1

Priority 2

Priority 3

Priority 4

Air Conditioner Connections:
Up to two A/Cs can be
controlled via low voltage
thermostat wires

Status LEDs: Shows
which loads are
currently allowed
to run.

Load Connections: Up to four loads of any type can
be controlled via these connections. (A separate
contactor module is required.)

1.4

TRANSFER SWITCH DATA

DECAL

A DATA DECAL is permanently affixed to the transfer switch enclo-

sure. Use this transfer switch only with the specific limits shown

on the DATA DECAL and on other decals and labels that may be

affixed to the switch. This will prevent damage to equipment and

property.
When requesting information or ordering parts for this equipment,

make sure to include all information from the DATA DECAL.
Record the Model and Serial numbers in the space provided below

for future reference.

MODEL #
SERIAL #

1.5

TRANSFER SWITCH

ENCLOSURE

The standard switch enclosure is a National Electrical Manufacturer’s

Association (NEMA) and UL 3R type. UL and NEMA 3R type enclo-

sures primarily provide a degree of protection against falling rain

and sleet; undamaged by the formation of ice on the enclosure.

1.6

SAFE USE OF TRANSFER

SWITCH

Before installing, operating or servicing this equipment, read the

SAFETY RULES (inside front cover) carefully. Comply strictly

with all SAFETY RULES to prevent accidents and/or damage to

the equipment. The manufacturer recommends that a copy of the

SAFETY RULES are posted near the transfer switch. Also, be sure

to read all instructions and information found on tags, labels and

decals affixed to the equipment.
Three publications that outline the safe use of transfer switches

are the following:
• NFPA 70; National Electrical Code
• NFPA 70E; Standard for Electrical Safety in the Workplace
• UL 1008, STANDARD FOR SAFETY-AUTOMATIC TRANSFER

SWITCHES

NOTE:

It is essential to use the latest version of any standard to ensure

correct and current information.

2.1

INTRODUCTION TO

INSTALLATION

This equipment has been wired and tested at the factory. Installing

the switch includes the following procedures:
•  Mounting the enclosure.
•  Connecting power source leads and load leads.
•  Connecting the generator sensing and transfer relay circuits.
•  Connecting any auxiliary contact (if needed)
•  Connect load shed module loads (as required)
• Testing functions.

2.2 MOUNTING

Mounting dimensions for the transfer switch enclosure are in this

manual. Enclosures are typically wall-mounted. See “Installation

Diagram”.



Handle transfer switches carefully when install-

ing. Do not drop the switch. Protect the switch

against impact at all times, and against con-

struction grit and metal chips. Never install a

transfer switch that has been damaged.

This transfer switch is mounted in a UL type 3R enclosure. It can

be mounted outside or inside and should be based on the layout