Honeywell THX9321 Thermostat User Manual


 
THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
31 68-0311—01
4070 Minimum Cool
Recovery Ramp Rate
Off
1° F/hr to 20° F/hr
3° F/hr Commercial No Off: The cooling system will begin recovery at the
time that is scheduled.
When a Minimum Recovery Ramp Rate is set, the
thermostat will begin recovery early to ensure the
temperature is reached at the scheduled time.
Set a Minimum Recovery Ramp Rate based on the
rate that the cooling system can recover at for a hot
day in your region. Default setting is 3° F / hour.
If an outdoor sensor is installed, set an Outdoor
Temperature that is representative of a hot day in
your region to be associated with the Minimum
Recovery Ramp Rate. The thermostat will begin
recovery at the optimal time based on a calculated
ramp rate, allowing the system to recover on time
and save energy during changing outdoor
conditions.
During recovery, the setpoint changes at a rate in
degrees per hour depending on the outdoor
temperature. If there is no outdoor sensor, the
Minimum Recovery Ramp Rate is used.
4070 Outdoor Temperature
used with Minimum
Cool Recovery Ramp
Rate
Off
-20° F to 100° F
90° F Commercial No Off: The cooling system will begin recovery at the
time that is scheduled.
When a Minimum Recovery Ramp Rate is set, the
thermostat will begin recovery early to ensure the
temperature is reached at the scheduled time.
Set a Minimum Recovery Ramp Rate based on the
rate that the cooling system can recover at for a hot
day in your region. Default setting is 3° F / hour.
If an outdoor sensor is installed, set an Outdoor
Temperature that is representative of a hot day in
your region to be associated with the Minimum
Recovery Ramp Rate. The thermostat will begin
recovery at the optimal time based on a calculated
ramp rate, allowing the system to recover on time
and save energy during changing outdoor
conditions.
During recovery, the setpoint changes at a rate in
degrees per hour depending on the outdoor
temperature. If there is no outdoor sensor, the
Minimum Recovery Ramp Rate is used.
4080 Maximum Cool
Recovery Ramp Rate
Off
1° F/hr to 20° F/hr
6° F/hr Commercial No Off: The cooling system will begin recovery at the
time that is scheduled.
When a Maximum Recovery Ramp Rate is set, the
thermostat will begin recovery early to ensure the
temperature is reached at the scheduled time.
Set a Maximum Recovery Ramp Rate
based on the
rate that the cooling system can recover at for a
mild day in your region. Default setting is 6° F /
hour.
Set an Outdoor Temperature that is representative
of a mild day in your region to be associated with
the Maximum Recovery Ramp Rate.
The thermostat will begin recovery at the optimal
time based on a calculated ramp rate, allowing the
system to recover on time and save energy during
changing outdoor conditions.
During recovery, the setpoint changes at a rate in
degrees per hour depending on the outdoor
temperature.
Table 2. Installer Setup (ISU) Table. (Continued)
ISU
Number Installer Setup Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes