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B. Cool Only (One or Two Stages)
HVAC Type
Stage: Non-HP | Type: HE
Connect Y2 wire (2nd Stage Cooling) is optional if available.
The HUM relay can be used for Humidification,
Dehumidification or as a W3 (3rd Stage Heat) relay. See page
15 for more information.
Dotted lines indicate an optional wire.
C. Heat (One, Two or Three Stages) and Cool
(One or Two Stages)
Stage: Non-HP | Type: HE for electric, HG for
gas/oil systems
Connect Y2 wire (2nd Stage Cooling) is optional if available.
Connect W2 wire (2nd Stage Heating) is optional if available.
The HUM relay can be used for Humidification,
Dehumidification or as a W3 (3rd Stage Heat) relay. See page
15 for more information.
Dotted lines indicate an optional wire.
20
HVAC Type
21
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