Common Maker Installation Instructions
Overview Troubleshooting ●● The Common Maker provides a common connection 1. Using a voltmeter, measure the voltage at the ‘C’ for Wi-Fi and powered thermostats. transformer to ensure it is between 23 to 28 volts. If it is outside this range the Common Maker may not work ●● A common connection allows the thermostat to operate without batteries or “power stealing” circuits. as intended. 2. Ensure that the Sender purple wire and the Receiver ●● The Common Maker is compatible with all 24V AC heating and cooling systems. purple wire are connected through the existing thermostat cable. Electrical Safety 3. At the thermostat base, place a jumper wire between ●● This product is designed for use with a Class 2 the ‘R’ and ‘W’ terminals. This should cause the heating transformer providing 23 to 28 volts. system to start. If the heating system does not start, the thermostat cable or Common Maker may be faulty. ●● The total connected load must not exceed 2 amps. 4. Disconnect the Sender and bring it to the location of ● The connected load cannot operate at more than 30 ● the Receiver. While keeping the Receiver connected volts (not designed for direct connection to 120 volt to the equipment, connect the Sender and Receiver equipment). purple wires together. Then apply 24V AC to the ●● To avoid risk of electrical shock or equipment damage, Sender white wire. The relay in the Receiver should disconnect power before beginning installation. energize. If the relay does not energize, the Common Maker may be faulty. Sender Installation Internal Wiring The Sender is the smaller component and has purple, white, and black wires. It is installed inside the wall behind When the Sender has 24V AC applied to its white wire, it the thermostat. will energize the relay in the Receiver, and complete the 1. Remove the thermostat from its base. circuit between the Receiver red and white wires. In most installations, this will connect the ‘R’ and ‘W’ terminals on 2. The thermostat base will have wires running into the the furnace. wall through a small hole. If this hole is not big enough to fit the Sender, enlarge the hole. Sender 3. Find the wiring diagram for your system (pages 2-4) Purple Black Thermostat and connect the wires accordingly. Red White Black 4. Place the Sender in the wall. It will hang by its wires C and does not require any mounting. Relay W 5. Place the thermostat back on its base. White Purple Note: The Sender will produce a small amount of heat R R Furnace W C while operating. Keep the Sender wires as long as possible to maximize the distance between the Sender and thermostat. Do not install the Sender in insulated walls. The Common Maker also supports dry-contact switching. In this configuration, the ‘T1’ and ‘T2’ terminals are Receiver Installation electrically isolated from the thermostat transformer. The Receiver is the larger component and has purple, white, black, and red wires. It is installed near the furnace, Sender boiler, air handler, zone valve, or zone controller. It should Purple Black
be placed in the equipment cabinet or a location without Red White exposure to liquids or high temperatures. Thermostat Black Follow the relevant wiring diagram for your system (pages C Relay 2-4) and connect the wires accordingly. Additional wiring diagrams may be found at www.fast-stat.com. W Purple White Testing R R T Controller T C After the Common Maker has been installed, check to see if it is functioning properly by following these steps: Contact Us 1. Use the thermostat to turn ON the heating system, and ensure that the heating system turns ON. For installation assistance, our technical support line can be reached at 1-800-775-4750, 9am-5pm PST, or emailed 2. Use the thermostat to turn OFF the heating system, at [email protected] and ensure that the heating system turns OFF. If the heating system failed to turn OFF, the power consumption of the thermostat is too high, and therefore incompatible with the Common Maker.
Page 1 of 4 www.fast-stat.com A Typical Installation for Furnaces, Boilers, and Air Handlers Before After
Thermostat Sender Thermostat
R W G G R C W
White Black Purple
If your installation has additional Thermostat wires (G, Y, etc.), they can be Thermostat Cable connected directly to the Cable furnace, boiler, or air handler. Receiver
Purple Red Black White FAST-STAT Common Maker R C W G G R C W
24V Transformer Heat 24V Transformer Heat
Furnace / Boiler / Air Handler Furnace / Boiler / Air Handler
B Dry Contact Switching with Internal Transformer Before After
Thermostat Thermostat Sender
R W R C W
White Black Purple
Thermostat Thermostat Cable Cable Receiver
Purple Black Red White FAST-STAT Common Maker R C T T R C T T
24V Transformer Heat 24V Transformer Heat
Controller Controller
Page 2 of 4 www.fast-stat.com C Dry Contact Switching with External Transformer Before After
Thermostat Thermostat Sender
R W R C W
White Black Purple
Thermostat Thermostat Cable Cable Receiver
Purple Black Red White FAST-STAT Common Maker T T If a 24V transformer is not T T accessible, a new transformer will have to be installed at the location 24V Transformer Control of the Common Maker Receiver. Control
Equipment External Transformer Equipment
D Directly Connected Gas Valve Before After
Thermostat Thermostat Sender
R W R C W
White Black Purple
Thermostat Thermostat Cable Cable Receiver
Purple Red Black White FAST-STAT Common Maker 24V Transformer 24V Transformer
TR TH TR TH
TR TH TR TH
External Transformer Gas Valve External Transformer Gas Valve
Page 3 of 4 www.fast-stat.com E Single Zone Valve with External Transformer Before After
Thermostat Thermostat Sender
R W R C W
White Black Purple
Thermostat Cable Thermostat Cable Receiver
Purple Red Black White FAST-STAT Common Maker T T T T
24V Transformer 24V Transformer Control Control
External Transformer Zone Valve External Transformer Zone Valve
F Zone Valve with Z-TV-W Aquastat (Varies by manufacturer - visit www.fast-stat.com for additional wiring diagrams) Before After
Thermostat Thermostat Thermostat Thermostat Sender Sender W R R W W C R R C W
White White Black Black Purple Purple
Thermostat Thermostat Thermostat Thermostat Cable Cable Cable Cable
FAST-STAT Receiver Purple Common Maker Red Black Zone Valve 3 2 1 Zone Valve 3 2 1 White
Purple Red Black Zone Valve 3 2 1 Zone Valve 3 2 1 White FAST-STAT Receiver Common Maker
T TV Z W T TV Z W
Aquastat Aquastat
Page 4 of 4 www.fast-stat.com