: Advanced Installation and Configuration Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Wiring Diagrams
Conventional System
For single stage heat and single stage cooling applications, 5 wires are required instead of the traditional 4.
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A common wire to power is needed to power the thermostat. Additional wires are shown as dotted lines for 2-stage equipment.
Most Bryant 2 stage furnace equipment can be operated with a single stage thermostat using the algorithm in the furnace circuit board to engage 2nd
stage. While a 2-stage thermostat can control the equipment, it is preferred to allow the Bryant equipment to determine the staging by not connecting
W2. See furnace installation instructions for heat staging setup.
Power Extender Kit (PEK)
The Power Extender Kit, also known as the PEK, allows the thermostat to operate with 4 wires instead of 5, which helps with retrofit applications. The
thermostat has a PEK terminal which digitally combines the G and Y1 signal. The PEK device, which gets installed at the equipment, separates that
combined signal back into separate 24v wires.
The PEK can go from 5 to 6 wires or from 8 to 9 wires. It can always add one more wire to the available wires. The 4 wires at the thermostat should be
wired as shown above. Additional wires would bypass the PEK and connect directly to the equipment.
Photo credit: ecobee
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