INSTALLATION INSTRUCTIONS FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE. SPECIFICATIONS DESCRIPTION SureSwitch™ is an electronically-controlled relay that can be used to replace single and two-pole contactors commonly used in air
Installation instructions. Failure to read and follow all instructions carefully before installing or operating this...
49M11-843 Emerson SureSwitchTM Multi-Volt INSTALLATION INSTRUCTIONS FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE. DESCRIPTION SureSwitchTM is an electronically-controlled relay that can be used to replace single and two-pole contactors commonly used in air conditioners, heat pumps and other applications. A patented switching algorithm reduces arcing between contacts, which nearly eliminates SureSwitch is similar to a 1 1/2 pole contactor, in that L1 only the compressor terminal T1(C) is switched. The compressor terminal T2(R) is connected by a shorting bar to line input L2, and is energized even when a call is not present. pitting and welding for a longer life. The switching mechanism is sealed to prevent intrusion from insects and other debris. SPECIFICATIONS Installation should be done by a qualified heating and air conditioning contractor or licensed electrician. Do not exceed the specification ratings. All wiring must conform to local and national electrical codes and ordinances. ELECTRICAL RATINGS Line Voltage Input...............120/208/240 VAC, 1-phase, 50/60 Hz Full Load Amperes (FLA)...................40 A Locked Rotor Amperes (LRA)............200A 24 VAC Control (Coil) Voltage (Y, C)....24 VAC, 50/60 Hz 120/240 VAC Control (Coil) Voltage (L1/L2).....120/208/240 VAC, Disconnect power before changing settings. 1-phase, 50/60 Hz Tri-Color LED Fault/Status Indicator Short Cycle Protection Delay Dipswitch Crankcase Heater Test Power Button Contactor Coil Inputs TEST Delay Brown ON COUNT L1 Line Inputs L2 Run T2 Compressor Outputs Common T1 RECOMMENDED LUG TORQUE L1, L2, T2(R) and T1(C) #4 6 AWG.......................................................... 45 in-lbs #8 AWG............................................................... 40 in-lbs #10 14 AWG...................................................... 35 in-lbs Following installation or replacement, follow manufacturer's recommended installation/service instructions to ensure proper operation. SureSwitch has no user serviceable parts. Replace as a unit. ! WARNING Failure to comply with the following warnings could result in personal injury or property damage. FIRE HAZARD · Do not exceed the electrical ratings for voltage and current. · Protect the control from direct contact with water (dripping, spraying, rain, etc.). · If the control has been in direct contact with water, replace the control. · Label all wires before disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. · Safety route and secure wiring after installation. SHOCK HAZARD · Disconnect electric power before servicing or changing settings. · Ensure proper earth grounding of appliance. · Ensure proper connection of the L1 and L2 wires. · Compressor output T2(R) is not switched and is energized at all times. Brownout Protection Count Button Brown Dipswitch Disconnect power before changing settings. Compressor/Fan Capacitor Outputs Hardstart Option Fan Common 1. Disconnect power to the condensing unit or equipment at the disconnect switch and/or main electrical panel. Ensure that all sources of power are disconnected before proceeding. 2. Label wires and remove old contactor. 3. Find a suitable mounting location inside the control box. Rotate SureSwitch as necessary to allow space for wiring and other components. 4. Loosen four housing captive screws attaching the bottom mounting plate to the main housing and separate the mounting plate from the main housing. 5. The bottom of the mounting plate has four mounting holes that match the typical mounting screw locations of a single or two-pole Mounting Holes INSTALLATION MAIN HOUSING Housing Screws MOUNTING PLATE French language emerson.com/white-rodgers Spanish language PART NO. 37-7810001 2017 INSTALLATION contactor. Secure the bottom mounting plate to the control box using the two self-tapping screws provided. 6. Replace the main housing on the mounting plate and secure by tightening all four housing captive screws. Take care to avoid over tightening. 7. Connect line and control voltage wiring. Refer to the wiring diagrams provided for more information. Tighten the L1, L2, T2(R) and T1(C) lugs to the recommended torque specifications. 8. Affix the provided Quick Reference Label inside the control box for future service. 120/240V 24V 120/240V 24V WIRING DIAGRAM (1-2) 24VAC HVAC THERMOSTAT 4-Wire Condenser Fans 3-Wire Condenser Fans T2 T1 Fan Run Start Fan Capacitor Separate Capacitor (Optional) Common Run Fan Start Fan Separate Capacitor Capacitor (Optional) Crankcase Heater House Thermostat C Y 49M11-843 SureSwitch L2 L1 T1(R) T2(C) NOTE: Only 2 of the 3 coil terminals should be connected FAN Compressor Capacitor L2 COM L1 HERM Run Common Compressor Start 3 Wire Hardstart Kit (optional) 1 Start Capacitor 2 5 2 Wire Hardstart Kit (optional) Start Capacitor Legend: Line voltage Low voltage Line voltage optional circuit Optional components WIRING DIAGRAM (2-2) LINE VOLTAGE Line Voltage Controller/T-Stat CONTROLLER / THERMOSTAT Crankcase Heater L1 Compressor relay output L2 49M11-843 SureSwitch NOTE: Only 2 of the 3 coil terminals should be connected L2 L1 T1(R) T2(C) Compressor Capacitor L2 COM L1 HERM Run Common Compressor Start ! CAUTION L1/T1 is not switched. For each connected load, verify that both polarities are supplied from the contactor. If not, ensure the correct polarity is switched for proper operation. OPERATION TEST SureSwitch includes a Test Mode to assist in system installation and troubleshooting. Press the "TEST" button for one second to energize the compressor and fan for five seconds without a Y call. RANDOM START DELAY At power-up and when SureSwitch recovers from a brownout, a random start delay of 5-90 seconds will be activated. This delay is in addition to the short cycle delay. During this delay the compressor will not be energized, even if a call for compressor operation is present. The random start delay can help reduce spikes in power consumption when multiple loads are re-energized after a blackout or brownout. The random start delay cannot be disabled, but is only active at initial power-up and when recovering from a brownout. Normal compressor cycling will not activate the random start delay. SHORT CYCLE PROTECTION Disconnect power before changing this setting. At power-up, and any time the compressor is de-energized, SureSwitch will activate a three minute short cycle delay. During this delay the compressor will not be energized, even if a call for compressor operation is present, to prevent compressor damage due to rapid on and off cycling. Normal operation resumes when the delay expires. Short cycle protection can be disabled by setting the "Delay" dipswitch to the OFF position. LINE-VOLTAGE BROWNOUT PROTECTION Disconnect power before changing this setting. This control has an auto-detect voltage level algorithm and will set the low line voltage limit on initial power up. This brownout limit will be saved and used on subsequent power ups. The level can be re-set using the Factory Reset process. Brownout protection can be disabled by setting the "Brown" dipswitch to the OFF position. LIFETIME CYCLE COUNT A count of compressor cycles since the control was installed is stored in the control's memory. To display the count, press and hold the "COUNT" button for one second. The LED will flash to indicate the total number of compressor cycles, rounded to the nearest 100 cycles: GREEN One Flash per 10,000 Cycles RED One Flash per 1,000 Cycles YELLOW One Flash per 100 Cycles FACTORY RESET The control can be reset to clear cycle count and brownout voltage level by pressing both buttons for 2 seconds until the LED flashes red/ yellow, then release buttons. Emerson and White-Rodgers are trademarks of Emerson Electric Co. ©2020 Emerson Electric Co. All rights reserved. emerson.com/white-rodgersAdobe PDF Library 15.0 Adobe InDesign 15.0 (Windows)