Honeywell Heat/1Cool User Guide - Page 29

T8511 Deluxe Electronic Heat Pump Thermostat

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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 System Selection Call Energize Display Icons Auto Off None None None On Off Fan G Auto Auto Cool Cool or Auto None Cooling O/Ba O/Ba, G, Y1 None and Auto Auto Heat Heat or Auto None Stage 1 heating O/Ba O/Ba, W1, G None and Auto Heat or Auto Stage 2 heating O/Ba, W1, W2, G , , and Aux Ht Auto Auto Em Heat Em Heat None Stage 1 heating O/Ba O/Ba, E, G Em Ht , and Em Ht Auto Em Heat Auto Auto a Configure O/B (Select Models) in Installer Setup. Stage 2 heating None O/Ba, E, W2, G O/Ba , None , Em Ht and Aux Ht 70-6627 • 27

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70-6627
•
27
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.
a
Configure O/B (Select Models) in Installer Setup.
HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE
Fan Selection
System Selection
Call
Energize
Display Icons
Auto
Off
None
None
None
On
Off
Fan
G
Auto
Cool
None
O/B
a
None
Auto
Cool or Auto
Cooling
O/B
a
, G, Y1
and
Auto
Heat
None
O/B
a
None
Auto
Heat or Auto
Stage 1 heating
O/B
a,
W1, G
and
Auto
Heat or Auto
Stage 2 heating
O/B
a,
W1, W2, G
,
, and Aux Ht
Auto
Em Heat
None
O/B
a
Em Ht
Auto
Em Heat
Stage 1 heating
O/B
a,
E, G
,
and Em Ht
Auto
Em Heat
Stage 2 heating
O/B
a,
E, W2, G
,
, Em Ht and
Aux Ht
Auto
Auto
None
O/B
a
None