Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 30

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE
T8611 Chronotherm IV Deluxe Programmable Heat Pump Thermostat
Sequence of Operation
The thermostat energizes specific terminals depending on the Fan and System Settings. The LCD will display the time, room
temperature, system and fan selection. Symbols will be displayed when the heating, cooling or fan is energized. See Table 4 for
specific information.
NOTE: Terminals listed in the Energize column vary depending on model.
Selection
Fan System
Auto
On
Auto Cool
Auto Cool or Auto
Auto Heat
Auto Heat or Auto
Auto Heat or Auto
Auto Em Heat
Auto Em Heat
Auto Em Heat
Auto Auto
a
Configure O/B (select models) in Installer Setup.
b
Based on last piece of equipment called (cooling = O or heating = B) and Installer Setup selection.
70-6627 • 28
Table 4. Heat Pump System Sequence of Operation.
Call
Off None
Off None
None
Stage 1 Cooling
None
Stage 1 heating
Stage 2 heating
None
Stage 1 heating
Stage 2 heating
None
Energize
None
G
a
O or O/B
a
O or O/B with
G and Y1
a
B or O/B
a
B or O/B with W1 and G
a
B or O/B with W2, W1 and G
a
B or O/B
a
B or O/B , E and G
(select models)
a,
B or O/B E and W2 and G
(select models)
a b
O/B , O or B
Display Icons
None
None
and
None
and
, , and Aux Ht
Em Ht
, and Em Ht
, , Em Ht and Aux Ht
None