Economizer And Time Of Day (Tod) Operation - Honeywell Home VisionPRO 8000 Manual

®
VISIONPRO 8000 WITH REDLINK™
4. Select a Remote Setback Time Delay. The Remote
Setback Time Delay forces the thermostat to wait
before it switches from occupied settings to the
Remote Setback settings. When set to 0 minutes, the
thermostat will switch from occupied settings to the
Remote Setback settings immediately when the room
is unoccupied.
Fig. 294.
5. Select the Remote Setback settings that you would
like to maintain when the occupancy sensor detects
the room is unoccupied.
Fig. 295.
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
68-0312—06
achieve the same level of comfort at lower cost. Table 6
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.
Table 6. Economizer Operation.
Thermostat
Mode
Occupied Heat/Cool running **
Occupied Heat/Cool running **
temporarily
Occupied Heat/Cool NOT
running **
Occupied Heat/Cool NOT
temporarily running **
Pre-occupancy Fan running
purge
Unoccupied Cooling system
running
Unoccupied Cooling system
temporarily running
Standby Cooling system
running
Unoccupied Cooling system NOT
running
Unoccupied Cooling system NOT
temporarily running
Standby Cooling system NOT
running
Non-programmable Fan running
Non-programmable Fan NOT running
* If an EIM is used, or ISU 222 "Economizer fault FDD" is
set to "no" then the A-L/A is used for economizer control.
If ISU 222 "Economizer fault FDD" is set to "yes" then the
U1 contacts are used for economizer control. U1 only
available on TH8321R model.
** Fan (G) is always energized during occupied & occupied
temporarily modes.
108
A-L/A
Terminal or
Equipment U1
Operation Contacts*
A-L/A
energized or
U1 contacts
closed. *
A-L/A NOT
energized or
U1 contacts
open. *
A-L/A
energized or
U1 contacts
closed. *
A-L/A NOT
energized or
U1 contacts
open. *