Honeywell Prestige 2.0 THX9421 Manual page 99

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.
NOTE: Backup heat upstage timer only used in steady
state (maintaining a temperature). It is not used if
setpoint has been raised. The holdoff timer
applies to a raise in temperature.
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. 199.
®
THX9321 PRESTIGE 2.0 AND THX9421 PRESTIGE
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.
99
®
IAQ WITH EIM
Fig. 200.
Fig. 201.
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