7
# ISU ISU Name
ISU Options (defaults in bold)
Notes
370
Heat 1 CPH
(Heating cycle
rate stage 1)
1 - 12 CPH
This ISU is only displayed when Heat Stages is set to 1 stage or more 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 recommended (default) cycle rate settings are
below for each heating equipment type:
Standard Efficiency Gas Forced Air = 5 CPH; High Efficiency Gas Forced Air = 3 CPH; Oil
Forced Air = 5 CPH; Electric Forced Air = 9 CPH; Fan Coil = 3 CPH; Hot Water Radiant Heat
= 3 CPH; Steam = 1 CPH.
371
Heat 2 CPH
(Heating cycle
rate stage 2)
1 - 12 CPH
This ISU is only displayed when Heat Stages is set to 2 stages. The recommended (default)
cycle rate settings are below for each heating equipment type:
Standard Efficiency Gas Forced Air = 5 CPH; High Efficiency Gas Forced Air = 3 CPH; Oil
Forced Air = 5 CPH; Electric Forced Air = 9 CPH; Fan Coil = 3 CPH; Hot Water Radiant Heat
= 3 CPH; Steam = 1 CPH.
375
Aux Heat CPH
(Heating cycle
rate Auxiliary
Heat)
1 - 12 CPH
This ISU is only displayed when ISU 200 = Heat Pump and ISU 221=1. It is only displayed when
Auxiliary Heat is configured. The recommended cycle rate settings are below for each heating
equipment type:
Standard Efficiency Gas Forced Air = 5 CPH; High Efficiency Gas Forced Air = 3 CPH; Oil
Forced Air = 5 CPH; Electric Forced Air = 9 CPH.
425
Smart Response
On,
Off
Smart Response is a comfort setting. Heating or cooling equipment will turn on earlier, ensur-
ing the indoor temperature will match the setpoint at the scheduled time.
429
Max Cool
Temperature
from Min. Cool Temp. to 99 °F or to 37.0 °C
(90 °F
or 32 °C)
The user cannot set the cooling temperature above this level.
430
Min Cool
Temperature
from 50 °F or 10.0 °C to Max. Cool Temp.
(50 °F
or 10 °C)
The user cannot set the cooling temperature below this level.
431
Max Heat
Temperature
from Min. Heat Temp. to 90 °F or to 32.0 °C
(90 °F
or 32 °C)
The user cannot set the heating temperature above this level.
432
Min Heat
Temperature
from 40 °F or 4.4 °C to Max. Heat Temp.
(50 °F
or 10 °C)
The user cannot set the heating temperature below this level.
702
Air Filters
0
- 2
This ISU refers to the number of air filters in the system.
711
Air Filter 1
Reminder
Off
10, 20, 30, 45, 60, 90, 120, 150 Run Time Days
30, 45, 60, 75 Days
3, 4, 5, 6, 9, 12, 15 Months
Choose either calendar or equipment run time-based reminder.
712
Air Filter 2
Reminder
Off
10, 20, 30, 45, 60, 90, 120, 150 Run Time Days
30, 45, 60, 75 Days
3, 4, 5, 6, 9, 12, 15 Months
Choose either calendar or equipment run time-based reminder.
810
Hum Pad
Reminder
Off
6, 12 Calendar Months
921
Dehum Filter
Reminder
Off
30, 60 Calendar Days
3 - 12 Calendar Months (in 1 month increments)
1018
Vent Filter
Reminder
Off,
3, 6, 9, 12 months
1100
UV Devices
0
- 2
Some systems may have two UV devices, one for the A-Coil and another for Air Treatment. A
replacement reminder can be setup for each one separately.
1105
UV Bulb 1
Reminder
Off,
6, 12, 24 months
1106
UV Bulb 2
Reminder
Off,
6, 12, 24 months
1401
Idle Brightness
0= Off,
0 - 5
Adjust brightness of an inactive backlight (idle screen) from default 0 (backlight off) to 5
(maximum
brightness).
1410
Clock Format
12 hour,
24 hour
1415
Daylight Saving
On,
Off
Set to Off in areas that do not follow Daylight Saving Time.
