Connect Wires To New Wallplate - Honeywell RTH7400D Owner's Manual

Step 7. Connect Wires to New Wallplate
1. Match the labeled wires to the letter designations
on the wallplate.
2. Select the correct letter designations to follow for
your system. If you have a standard heating and/or
cooling system, use the CONVENTIONAL letter
designations. If you have a heat pump system, use
the HEAT PUMP letter designations to wire the new
thermostat.
See table on page 30 to help you determine if
you have a CONVENTIONAL or HEAT PUMP
system.
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