VISIONPRO
®
8000 WITH WI-FI
®
81 33-00096—01
Ramp Rates (Commercial Use)
When the ramp rate is set to Off, the thermostat begins
recovery at the scheduled time.
When a ramp rate is set, recovery begins early to reach the
setpoint by the program time. Based on your recovery ramp
setting and how far the thermostat is set back, the thermostat
determines how early to turn on the system.
If an outdoor sensor is installed, you can set outdoor
temperatures for mild, cold and hot days in your region. By
setting these outdoor temperatures, the thermostat will
automatically adjust the ramp rate based on outdoor
conditions. This allows the thermostat to save energy by
starting recovery at the optimum time as outdoor conditions
change.
NOTE: The thermostat uses an adjustable ramp rate
when the thermostat is setup for commercial. This
allows the thermostat to recover on time during
changing conditions (occupancy changes, tem-
perature overrides, load conditions, opening/clos-
ing of doors etc) which are common in
commercial applications.
Fig. 216.
Fig. 217.
Economizer and Time of Day (TOD)
Operation
Economizer
The thermostat controls an economizer module to provide
ventilation during occupied periods and free cooling when
outdoor conditions are favorable. In some climates the cooling
system may run several hours when it may not be required to
maintain indoor comfort. When outdoor conditions are
favorable, ventilation with outdoor air can achieve the same
level of comfort at lower cost. Table 5 explains how the
Economizer Module is controlled by the thermostat.
The thermostat works with the W7220, W7212, W7213 and
W7214 Economizer Modules for both heat pump and
conventional systems.
Time of Day (TOD)
The thermostat can be set up for a Time of Day output in the
installer setup. This output is commonly used to control lighting
panels, turning them on for occupied periods and off for
unoccupied periods. Table 6 explains how the TOD feature
works with various thermostat modes.
The Economizer Module and Time of Day output connect to
the A-L/A terminal at the thermostat and are set up at ISU 222.
Table 5. Economizer Operation.
Thermostat Mode Equipment Operation
A-L/A terminal:
Economizer
Occupied Heat/Cool/Fan running
ON
Occupied
temporarily
Heat/Cool/Fan running
Occupied Heat/Cool/Fan NOT
running
Occupied
temporarily
Heat/Cool/Fan NOT
running
Pre-occupancy
purge
Fan running
Unoccupied Cooling system running
Unoccupied
temporarily
Cooling system running
Standby Cooling system running
Unoccupied Cooling system NOT
running
OFF
Unoccupied
temporarily
Cooling system NOT
running
Standby Cooling system NOT
running
ON
Non-programmable Fan running
Non-programmable Fan NOT running OFF
Table 6. TOD Operation.
Thermostat Mode
A-L/A terminal:
TOD
Occupied
ONOccupied temporarily
Temperature overrides
Unoccupied
OFF
Unoccupied temporarily
Standby
Non-programmable
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