Honeywell PRESTIGE THX9321 - Manual (Page 99)

THX9321 PRESTIGE ® 2.0 AND THX9421 PRESTIGE ® IAQ WITH EIM
99 68-0311—02
2. Default is Comfort. Adjust differentials as needed.
Fig. 195.
Backup Heat Upstage Timer
The Backup Heat Upstage Timer is available for any system
with 2 heating types and the Backup Heat Differential is set to
2 °F (1.0 °C) or higher.
Backup heat is not used unless the indoor temperature drops
to the Backup Heat Differential setting or the Backup Heat
Upstage Timer expires, whichever occurs first. The upstage
timer starts when the highest stage of the previous equipment
type turns on.
Backup Heat Upstage Timer options are Off, 30 minutes to 16
hours. Default is Off.
Fig. 196.
Multistage Control
Multistage Control keeps the high stage of the equipment
running until the desired setpoint is reached. This setting is
recommended for Geothermal Heat Pumps to allow the loop to
rest.
Select Yes to turn on this feature. Default is No.
Fig. 197.
Fig. 198.