Honeywell VisionPRO 8000 Product Data page 54

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VISIONPRO 8000 WITH WI-FI
TO CHANGE DIFFERENTIAL SETTINGS
1. Select Advanced Options to view/adjust differentials
between all stages.
2. Default is Comfort. Adjust differentials as needed.
Backup Heat Droop
A Backup Heat Droop is available for any system with 2 heating
types. For example:
• Heat Pumps with any type of Backup Heat
• Radiant Heat with any type of Backup Heat
• Hot Water Fan Coil with any type of Backup Heat
The Backup Heat Droop restricts backup heat during the
following conditions:
• Normal Operation
• Manual Setpoint Changes
The options are:
• Comfort – keeps temperature within 1 degree of the
setpoint.
• 2 to 15 °F – Backup heat is not used unless the indoor
temperature drops to the selected Backup Heat Droop. For
example, if the Backup Heat Droop is set to 2 °F (1.0 °C),
the indoor temperature must be 2 °F (1.0 °C) away from the
setpoint before the backup heat turns on.
NORMAL OPERATION
When the Backup Heat Droop is set to Comfort, the thermostat
uses backup heat as needed to keep the indoor temperature
within 1 °F (0.5 °C) of the setpoint. The Comfort setting is NOT
an option on heat pumps with fossil fuel backup heat.
When the Backup Heat Droop is set to 2 °F or higher, backup
heat is not used unless the indoor temperature drops to the
Backup Heat Droop 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.
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Fig. 102.
Fig. 103.
MANUAL TEMPERATURE CHANGE
When the Backup Heat Droop is set to Comfort, the thermostat
uses backup heat as needed to keep the indoor temperature
within 1 °F (0.5 °C) of the setpoint. The Comfort setting is NOT
an option on heat pumps with fossil fuel backup heat.
When the Backup Heat Droop is set to 2 °F or higher, if the
primary heat is making progress as expected, backup heat will
not be used to reach the new setpoint. Set to a higher number
to use less backup heat (a greater difference between the
current indoor temperature and the new setpoint is required to
turn on backup heat). See notes below.
PROGRAMMED RECOVERY
If the primary heat is making progress as expected, backup
heat will not be used to reach the setpoint of the next program
period. Backup heat is always restricted during a programmed
recovery when the Adaptive Intelligent Recovery feature is
used. See note below.
NOTE: During a programmed recovery (or when the tem-
perature setpoint is changed by the user), the
thermostat waits to turn on the backup heat
depending on system performance, load condi-
tions and how many degrees the temperature set-
point is changed. Backup heat will be used ONLY
when the temperature is not rising quickly
enough to reach the setpoint in a reasonable time.
NOTE: If the backup heat was used in the last 2 hours
because the primary heat was not able to main-
tain the setpoint, the thermostat may turn on the
backup heat earlier when the user raises the set-
point. This does NOT apply to heat pumps with
fossil fuel backup heat.
TO CHANGE BACKUP HEAT DROOP SETTINGS
1. Select Basic Options or Advanced Options to view/adjust
Backup Heat Droop settings.
2. Default is Comfort. Adjust differentials as needed.
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Fig. 104.
Fig. 105.