Installing A Bypass Resistor To Enable Power Stealing On A Wireless Thermostat - Control 4 CCZ-T1-W Installation Manual

Installing a Bypass Resistor to Enable Power Stealing on a
Wireless Thermostat
Although Control4 recommends using a common wire to provide power to the Thermostat, the
Wireless Thermostat is capable of power stealing. This should only be done when using a com-
mon wire is not feasible.
Not all HVAC configurations reliably permit power stealing. If your HVAC uses an integrated digi-
tal control panel as part of a zoning system, or it is built into the heating or cooling equipment,
it is more likely to encounter difficulties interfacing with a power stealing Thermostat. Installing
the bypass resistor (included) can help minimize the effects of power stealing on the HVAC
system. Some HVAC configurations, however, do not require the bypass resistor to reliability use
power stealing. Other HVAC systems may not be able to use power stealing reliably even with
the bypass resistor installed.
Bypass Resistor Instructions
Included in the packaging of each Control4 Wireless Thermostat is a 270 Ohm 3W resistor. Fol-
lowing the steps below, connect the resistor to the HVAC system to provide a bypass path from
the heat relay circuit to the common side of the 24V HVAC transformer:
1
Locate the supplied 270 Ohm Resistor (see Figure 6) which is included in the Thermostat
packaging with the Thermostat battery, wall anchors and screws).
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