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VISIONPRO
®
IAQ TOTAL HOME COMFORT SYSTEM
68-0287—04 14
190 Reversing Valve
O/B
0
1
Changeover valve—O/B terminal is
energized in cooling
Changeover valve—O/B terminal is energized
in heating
Only shown if ISU172 = 2.
200 Back-up Heat
Source Applies to
both Aux and
EmHeat
E
0
1
Auto Discover
Electric backup heat
Fossil fuel backup heat
Only shown if ISU172 = 2 and ISU176 = 1 or
greater.
210 External Fossil
Fuel Kit
1
0
External Fossil Fuel kit controls backup
heat*
Thermostat controls backup heat
*Cannot control dual fuel when used with W8835
Envirazone Panel.
Only shown if ISU172 = 2 and ISU200 = 1.
220 CPH for 1st
Stage Cool/
Compressor
1-6
E
3—cph recommended for compressors
1, 2, 4, 5, 6—other cycle rate settings
Auto Discover
230 CPH for 2nd
Stage Cool/
Compressor
1-6
E
3—cph recommended for compressors
1, 2, 4, 5, 6—other cycle rate settings
Auto Discover
Only shown if ISU174 = 2.
240 CPH for 1st
Stage
Conventional
Heat or Auxiliary
1-12
E
1—1 cph used for steam and gravity
3—3 cph used for hot water system and high
efficiency (90% or better) furnaces
5—5 cph used for standard fossil fuel forced
air (less than 80% efficient) systems
9—9 cph used for electric furnaces
2, 4, 6, 7, 8, 10, 11, 12—other cycle rate
settings
Auto Discover
Only shown if ISU172 = 2 and ISU176 = 1 or higher.
Default varies based on types of heating.
250 CPH for 2nd
Stage
Conventional
Heat or 2nd
Stage Auxiliary
1-12
E
1—1 cph used for steam and gravity
3—3 cph for hot water systems and high
efficiency (90% or better) furnaces
5—5 cph for standard fossil fuel forced air (less
than 90% efficient) systems
9—9 cph used for electric furnaces or electric
auxiliary heat for heat pump systems
2, 4, 6, 7, 8, 10, 11, 12—other cycle rate
settings
Auto Discover
Only shown if ISU176 = 2 or for Heat Pump systems
with 2 stages of Auxiliary Heat.
Default varies based on types of heating.
260 CPH for 3rd
Stage Heat
1-12
E
1—1 cph used for steam and gravity
3—3 cph for hot water systems and high
efficiency (90% or better) furnaces
5—5 cph for standard fossil fuel forced air (less
than 90% efficient) systems
9—9 cph used for electric furnaces or electric
auxiliary heat for heat pump systems
2, 4, 6, 7, 8, 10, 11, 12—other cycle rate
settings
Auto Discover
Only shown if ISU176 = 3.
Default varies based on types of heating.
270 CPH for
Emergency Heat
9
1-12
Default
Only shown if heat pump is selected.
280
USU
Continuous
Backlight
0
1
Backlight not on continuously. Thermostat
backlight comes on with each key press.
Backlight is on continuously.
If backlight is on continuously, it is low-intensity.
Light changes to full brightness after pressing any
key.
300 Changeover 0
1
Manual
Auto
Auto Changeover allows user to choose heat, cool,
off or auto. When set to Auto the thermostat will
automatically choose heat or cool based on room
temperature and heat/cool set points. Manual
changeover allows the user to manually toggle
between heat, cool and off.
310 Deadband
32.0
21.5
42.5
53.0
63.5
74.0
84.5
95.0
3°F 2.0°C
2°F 1.5°C
4°F 2.5°C
5°F 3.0°C
6°F 3.5°C
7°F 4.0°C
8°F 4.5°C
9°F 5.0°C
Note: degrees C is not same as degrees F
Only shown if ISU300 = 0. The deadband indicates
the minimum number of degrees that are allowed
between the heat and cool settings when in auto
changeover. For example, if the deadband is set to
3°F and the cool setpoint is 75°F the warmest heat
setpoint allowed would be 72°F.
320
USU
Temperature
Indication Scale
0
1
Fahrenheit temperature display
Celsius temperature display
330
USU
Daylight Saving 2
0
1
Enabled (US 2007)
Disabled
Enabled (US 1987)
Set to 0 in areas that do not follow daylight savings
time.
Table 3. Installer Setup Menu. (Continued)
ISU
Parameter
Number
Installer Setup
Name
Settings
(Factory Defaults Shown in Bold) Notes