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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
68-0311—01 28
3160 Backup Heat Cycles
Per Hour - Stage 2
1 to 12 CPH Default varies
based on heating
equipment type
selected
Both No ISU 3010 Temperature Control Options must be set
to Advanced to view or adjust cycle rate.
This ISU is only displayed when ISU 2070 or 2130
Backup Heat Stages is set to 2 stages.
Cycle rate limits the maximum number of times the
system can cycle in a 1 hour period measured at a
50% load. For example, when set to 3 CPH, at a
50% load, the most the system will cycle is 3 times
per hour (10 minutes on, 10 minutes off). The
system cycles less often when load conditions are
less than or greater than a 50% load. The
thermostat automatically defaults to the
recommended cycle rate based on the heating
equipment type that is used. You can change the
cycle rate as needed. Default for commonly used
systems are shown below.
Standard Efficiency Gas Forced Air = 5 CPH
High Efficiency Gas Forced Air = 3 CPH
Oil Forced Air = 5 CPH
Electric Forced Air = 9 CPH
Hot Water Fan Coil = 3 CPH
Hot Water Radiant Heat = 3 CPH
Geothermal Radiant Heat = 3 CPH
Steam = 1 CPH
Gravity = 1 CPH
3170 Cooling Throttling
Range
1° F to 30° F 2° F Commercial No The default Cooling Throttling range is 2° F (1.5° C)
which is appropriate for most applications. Do not
change this setting unless advised to do so by
Honeywell technical support.
The throttling range controls the cycling of the
system and helps to compensate for load changes,
equipment sizing and thermostat mounting
location.
3180 Cooling Integral 0, 100 to 25,000 sec 10,000 sec Commercial No The default Cooling Integral is 10,000 seconds
which is appropriate for most applications. Do not
change this setting unless advised to do so by
Honeywell technical support.
The integral controls how much droop is used.
3190 Cooling Derivative 0, 100 to 25,000 sec 0 sec Commercial No The default Cooling Derivative is 0 seconds which is
appropriate for most applications. Do not change
this setting unless advised to do so by Honeywell
technical support.
The derivative makes adjustments to the algorithm
for fast acting systems.
3200 Heating Throttling
Range
1° F to 30° F 2° F Commercial No The default Heating Throttling Range is 2° F (1.5° C)
which is appropriate for most applications. Do not
change this setting unless advised to do so by
Honeywell technical support.
The throttling range controls the cycling of the
system and helps to compensate for load changes,
equipment sizing and thermostat mounting
location.
3210 Heating Integral 0, 100 to 25,000 sec 10,000 sec Commercial No The default Heating Integral is 10,000 seconds
which is appropriate for most applications. Do not
change this setting unless advised to do so by
Honeywell technical support.
The integral controls how much droop is used.
3220 Heating Derivative 0, 100 to 25,000 sec 0 sec Commercial No The default Heating Derivative is 0 seconds which is
appropriate for most applications. Do not change
this setting unless advised to do so by Honeywell
technical support.
The derivative makes adjustments to the algorithm
for fast acting systems.
3240 Minimum
Compressor Off Time
Off
1 - 5 minutes
5 minutes Both No The thermostat has a built in compressor protection
(minimum off timer) that prevents the compressor
from restarting too early after a shutdown. The
minimum-off timer is activated after the
compressor turns off.
If there is a call during the minimum-off timer, the
thermostat shows “waiting for equipment” in the
display.
Table 2. Installer Setup (ISU) Table. (Continued)
ISU
Number Installer Setup Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes