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Ease of Installation
Intermediate (Installs < 60 minutes)
Brand
Venstar
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Adapt a 5-Wire Thermostat to a 4-Wire System
Add-A-Wire Accessory for Programmable Digital Thermostats
Add-A-Wire Accessory for Programmable Digital Thermostats

Add-A-Wire
11 customer ratings: Customers rated this product 3.5 Stars
Item# 304AAW
Price: Normally $35.99 
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Overview

  • Allows 5-wire thermostats to use only 4 wires
  • Also allows 5 wires to work like 6 wires
  • Easy to install
  • Easier than running new wire

Essential Info

In applications where additional wiring cannot be run to your programmable digital thermostat, the Add-A-Wire accessory can be used to add a wire to the thermostat. The accessory can also be used to fix a broken wire, to make one thermostat work like two, to add cooling to a heat-only system, or to add a common wire to a 4-wire system.

Please Note: the green and yellow wires of the Diode "Y" may not be connected to the R or C terminal of the thermostat. (The function of a diode is to allow current in one direction and to block current in the opposite direction.)

This accessory works with the 1-Day Programmable Digital Thermostat, the 7-Day Programmable Digital Thermostat, and the 7-Day Programmable Thermostat, Dual Fuel (each sold separately).

Manuals/Software

What's Included

  • Add-A-Wire Accessory
  • Y Diode
  • 4 Wire Nuts
  • More Info


    STANDARD FEATURES:
  • Includes Yellow, Green, Blue wire splice (directionally sensitive)
  • Includes 4 wire nuts
  • Wires running from Add-A-Wire accessory are 9" long
  • Maximum distance for Add-A-Wire using 18-gauge wire is 100ft
  • Makes one wire work like two
  • Mounts inside equipment (not for outdoor use)
  • For use with 24-volt HVAC systems
  • Cannot be used as "R" power or "C" common wire

  • Specifications

    Specifications

    Manufacturer:Venstar
    Manufacturer Product No.:ACC0410
    Dimensions:3" x 1.75" box and 9" long wires
    Weight:0.5 lb.
    Safety Approvals:UL Listed
    Regulatory:FCC Compliant
    Warranty:5 years, limited



    Images/Video

    Add-A-Wire Dimensions  4 to 5 Wire Thermostat Diagram  2 Wire Cooling & Heating Diagram  4 Wire Single Stage Heat Pump Diagram 
    Add-A-Wire Dimensions  4 to 5 Wire Thermostat Diagram  2 Wire Cooling & Heating Diagram  4 Wire Single Stage Heat Pump Diagram 

    Reviews

    "A little pricy, but works well. Note that you can use more than one to increase the number of wires more." - CHARLES - CHICAGO, IL
    "Device works exactly as described. Directions are not clear." - PAUL - PHILADELPHIA, PA
    "I love that I was able to find his product and it really has given me so much more independence. It works great and would recommend to anyone" - RUTH ANN - GREELEY, CO

    Accessories

    1-day Programmable Digital Thermostat  7-day Programmable Digital Thermostat  7-day Programmable Thermostat, Dual Fuel   
    1-day Programmable Digital Thermostat  7-day Programmable Digital Thermostat  7-day Programmable Thermostat, Dual Fuel   

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