Sequence Of Operation - Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE
T8511 Deluxe Electronic Heat Pump Thermostat

Sequence of Operation

The thermostat energizes specific terminals depending on the Fan and System Settings. The LCD will display symbols and words to
report the condition of system. See Table 3 for specific information.
Table 3. T8511G Sequence of Operation for Separate Compressor Terminal (Y and W1) Models.
Fan Selection
Auto
On
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
a
Configure O/B (Select Models) in Installer Setup.
System Selection
Off
Off
Cool
Cool or Auto
Heat
Heat or Auto
Heat or Auto
Em Heat
Em Heat
Em Heat
Auto
Call
None None
Fan G
None O/B
Cooling O/B
None O/B
Stage 1 heating O/B
Stage 2 heating O/B
None O/B
Stage 1 heating O/B
Stage 2 heating O/B
None O/B
Energize Display Icons
None
a
None
a
, G, Y1 and
a
None
a,
W1, G and
a,
W1, W2, G ,
a
Em Ht
a,
E, G ,
a,
E, W2, G ,
a
None
, and Aux Ht
and Em Ht
, Em Ht and
Aux Ht
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