Installation Manual Model THERM-500
Thank You Congratulations and thank you for purchasing your new First Alert™ Onelink™ Wi-Fi® Thermostat. You’ve chosen to invest in one of the world’s most advanced and convenient thermostats for controlling your home’s heating and cooling systems. The First Alert™ Onelink™ Wi-Fi Thermostat is easy to install, easy to use and can help save you money on your heating and cooling costs. A typical installation takes only 20-30 minutes. If you have any problems or questions during installation please visit www.
Compatibility The First Alert™ Onelink™ Wi-Fi Thermostat is designed to work with 5 both 4-Wire and 5-Wire 24V systems, including gas, electric, oil, WIRE forced air, variable speed, heat pump and radiant.
Removal Instructions Your First Alert™ Onelink™ Wi-Fi Thermostat is designed to work with most 5-wire and 4-wire systems. 7 wires required for most VIDEO multistage systems, systems with cooling, and all electric heating systems that include humidification / dehumidification equipment. Look for the following icons for special instructions that apply specifically to either a 5-wire or 4-wire system. Visit www.firstalert. com/thermostats for installation and support videos.
Step 3 Label and Disconnect Wires 1) TIP: Before disconnecting any wires, take a photo of your current wire configuration with your mobile device. One by one, apply the corresponding sticker (below) to each wire and disconnect each from your current thermostat. 2) Be sure to note placement of jumper cables as you may need them in the new system.
Installation Instructions Step 4 Remove Current Backplate Unscrew the current backplate and remove it TIP: Wrap the wires around a pencil or pen to keep them from falling inside the wall. from the wall. Be careful not to let the wires fall into the wall. Step 5 Mount New Base 1) Gently separate the display from the base by pulling first from the bottom and then the top until the two pieces unsnap.
Step 6 Connect Wires 1) Match your previous wire configuration to the new base. One by one, connect each wire by inserting the metal end into the corresponding slot and tightening the screw. TIP: Use pliers to straighten wire before inserting into new base. Be sure to cut any excess wire where the insulation extends to the terminal block. when the wire is installed properly to the terminal block, there should be no copper exposed.
4 WIRE The WI-FI thermostat requires a C wire to operate. The C, or common wire completes the path of 24 VAC power to the thermostat. Many older mechanical or battery operated thermostats do not require a C wire and therefore it may not be present or is present and was not previously utilized. Look for an unused wire that may be pushed into the wall. If one is found then this wire can VIDEO be used as common and connected to the common terminal of the thermostat.
Step 7 Check Dip Switch 1) Ensure which switch is correct for your system. Dip switches are 1 3 ON 2 1 GAS/EL O GAS HP B ELEC This dip switch configures the thermostat to control 2 3 a conventional gas/electric system or a heat pump. If your system is anything other than a heat pump, leave 1 ON 2 OR 1 ON HP B ELEC GAS/EL HP 3 GAS/EL HP 2 ON GAS/EL O GAS 3 located on the back of the thermostat 3 3 this switch set for GAS/EL.
Step 8 Attach Thermostat Display 1) Align the pins on the display with the corresponding holes below the wiring connectors and push the top and the bottom of the plastic housing enclosing the display until it clicks into place. ! Display should click into place easily. If you encounter resistance do not apply excess force – take the plate off, check that the pins are straight and ensure there are no wires in the way and retry.
Troubleshooting Use the following troubleshooting guide to diagnose common problems. If you are still having problems or are unsure please visit www.firstalert.com/thermostats or call customer service at 800-323-9005. Problem Possible Cause Solution The air conditioning does not attempt to turn on. The compressor timer lockout may prevent the air conditioner from turning on for a period of time Adjust the Compressor Min. Off Time to “None”. The display is blank. Lack of proper power.
© 2015 BRK Brands, Inc. All rights reserved. Distributed by BRK Brands, Inc., Aurora, Illinois 60504. Due to continuing product development, the product inside the packaging may look slightly different than the one on the package. 1 Year Limited Warranty - see inside for details. First Alert is a trademark of The First Alert Trust. BRK Brands, Inc. is a subsidiary of Jarden Corporation (NYSE: JAH). Wi-Fi® is a registered trademark of Wi-Fi Alliance. App Store is a service mark of Apple Inc.
