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HVAC Designer

Designer1Designer1 Posts: 6Member
Why would the attached gas/DX rooftop

unit thermostat have (4) mercury switches in it.  I think you only need 1

for heating and 1 for cooling.  Please explain this Honeywell standalone

thermostat to me.









I know what the heat anticipator does,

but there seems to be (2) heat anticipators in this thermostat (one set for 0.6

amps and one set for 0.375 amps).Does it have to do with defining the deadband (on - off) or does it have to do with 2 stages of heating and 2 stages of cooling?
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