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Appendix: Heat Pump
Identifi cation
1. How do I know if I have a Heat Pump?
2. How do I know if I should select
On1 or On2 for my Heat Pump?
• Check the documentation for your heating and cooling system or
contact your HVAC contractor.
• Confi rm that you have a Heat Pump by checking the labels of the
wires coming out from the wall (labels you attached according to the
right-hand column of the 2.2.2 table).
• The labeled thermostat wires coming out of the wall indicate whether
you have a
1-stage or 2-stage Heat Pump.
According to the right-hand column
of the 2.2.2 table, if you have:
According to the right-hand column
of the 2.2.2 table, if you have:
An “O” wire, or a “B” wire
One “Y” wire coming from the wall
One “Y” wire and one “Y2” wire
coming from the wall
You have:
You have:
A Heat Pump
1-stage Heat Pump, select On1
2-stage Heat Pump, select On2