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515 SureSwitchTM Universal Relay Overview

1 and 1.5 Pole, 40FLA, 208-240 VAC

Why Do Contactors Fail?

Pitting and Welding

of the Contacts

Contamination from

Bugs and Debris

Mechanical Contactor

• Open and Close at Random, opening and closing at peak of the Hz line-

LEADS TO ARCING!!!

SureSwitch Relay

• SureSwitch Relay Contacts are totally Sealed

• Only opens and closes when in the Zero Crossover Range-

NO ARCING NO DEBRIS

How Does SureSwitchTM Solve the Problem?

Zero Crossover (No Voltage)

60 Hz

No Voltage = No Arcing+ VAC

- VAC

1M CYCLES

300K CYCLES

SureSwitch Optical Reader Works at the

speed of light!

1-Pole• Only one line is

switched• No terminals for

unswitched line• Not common in

new units

1.5-Pole• Only one line is

switched• Terminals for

unswitched line• Most common in new

units

2-Pole• Both lines are

switched• Terminals for both

lines• Less common in new

units than 1.5-pole

Difference Between Contactors Poles

SureSwitch has been used on 2 Pole applications where it meets

local codes requirements

Installation and Wiring

Installation

• Mounts the Same as Traditional Contactor

– Mounting Plate Matches Traditional Contactor and can be mounted in any orientation

Wiring

• Wires the Same as a Mechanical Contactor 1 and 1.5 Pole 40 FLA

– Self-powered – Lug connections on most models

SureSwitch Universal Relay Contactor ReplacementSample Wiring Diagram

SureSwitchTM Relay Additional Features- Not an “old school” contactor!

• True 208/240VAC Line Brownout Protection – Protect system from operating during low conditions

during start up or while running– On/Off Option

• Random Start Delay Timer– Protects multi-unit installations from large surge on

restart – benefits utility and homeowner– 5 to 90 sec., On Power-Up & Brownout Recovery

• Short Cycle Protection – Ensure system pressure is stabilized before starting

compressor– On/Off Option

• Three-Color LED Status / Fault / Cycle Count Displays

No Arcing, Sealed Mechanical Relay with

a Microprocessor Brain

Benefit Feature Function

Easy to InstallSelf Powered / Universal Wiring No new wires needed

Lug Connectors Compressor and power wiring

Improved Reliability

Totally Sealed Switch Relay Protect from bugs or debris

Smart “Zero Cross” Switching ensures 5 times the life of contacts

Minimize contact damage, increased cycle life

Latching Compressor Relay No chatter, less VA draw

Line Voltage Brownout ProtectionNo low voltage operation, on start-up or during run

Short Cycle Protection System pressure equalization

Random start delayVariable (5 – 90s, On Power-Up &

Brownout Recovery)

Protects multi unit installations from large surge on restart

Easy to Service

Test Button Powered test of device

LED Status/Fault display Control and system info

Cycle Count Display Track product use history

Peace of Mind 5 Year Warranty Builds Confidence, Provides Value

Emerson SureSwitchTM Relay