Filter
Top Products
THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
27 68-0311—01
3150 Heat Cycles Per Hour
- Stage 3
Note: Depending on
the application, the
text displayed on the
screen may show the
specific heating
equipment type.
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 Heat
Stages is set to 3 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. Defaults 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
3160 Backup Heat Cycles
Per Hour - Stage 1
Note: “Stage 1" is not
displayed if there is
only 1 stage.
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 1 stage.
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. Defaults 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
Table 2. Installer Setup (ISU) Table. (Continued)
ISU
Number Installer Setup Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes