Staging Control - Honeywell TH8320R1003 Installation Manual

®
VISIONPRO 8000 WITH REDLINK™
8. Repeat steps 4–5 for the other Dry Contact, if necessary.

Staging Control

Differential Between All Stages
The thermostat provides Differential settings between all
stages. The equipment changes stages based on how far the
indoor temperature is from the setpoint. Differential settings
provide a way to balance comfort and conservation.
Heat Differential
The indoor temperature must drop to the selected differential
setting before the thermostat will turn on the stage of heating.
For example, if stage 2 is set to 2 °F (1.0 °C), the indoor
temperature must be 2 °F (1.0 °C) away from the setpoint
before stage 2 turns on. When set to Comfort, the thermostat
will use the stage of heating as needed to keep the indoor
temperature within 1 °F (0.5 °C) degree of the setpoint. The
thermostat turns on stage 2 when the capacity on stage 1
reaches 90%.
Cool Differential
The indoor temperature must rise to the selected differential
setting before the thermostat turns on the stage of cooling. For
example, if stage 2 is set to 2 °F (1.0 °C), the indoor
temperature must be 2 °F (1.0 °C) away from the setpoint
before stage 2 turns on. When set to Comfort, the thermostat
uses the stage of cooling as needed to keep the indoor
temperature within 1 °F (0.5 °C) degree of the setpoint. The
thermostat turns on stage 2 when the capacity on stage 1
reaches 90%.
68-0312—03
Scroll to see:
Contact your
dealer to service
your sump pump
Fig. 162.
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.
76
Fig. 163.
Fig. 164.