Sequence of operation
CNT-SVX04A-EN
61
Table 33
Fan configuration
Additional flexibility built into the controller allows you to enable or disable the
local fan switch input. The fan mode request can be either hardwired or
communicated to the controller. When both are present, the communicated
request has priority over the hardwired input. Refer to Table 34 and Table 35.
Table 34
Local fan switch disabled or not present
Table 35
Local fan switch enabled
Continuous fan operation
During occupied and occupied standby modes, the fan normally is on. For
multiple speed fan applications, the fan normally operates at the selected or
default speed (off, high, medium, low, auto). When fan mode is auto, the fan
operates at the default fan speed. See Table 36 on page 62 for fan operation
during heating and cooling operation for all occupancy modes.
Auto fan operation
Fan speed default
Heating
Continuous
Off
Low
Medium
High
Auto
Cooling
Continuous
Off
Low
Medium
High
Auto
Communicated fan speed input
Fan operation
Off
Off
Low
Low
Medium
Medium
High
High
Auto (or not present)
Auto (fan runs at the default speed)
Communicated
fan speed input
Fan switch
(local)
Fan operation
Off
Ignored
Off
Low
Ignored
Low
Medium
Ignored
Medium
High
Ignored
High
Auto
Off
Low
Medium
High
Auto
Off
Low
Medium
High
Auto (configured default,
determined by heat/cool mode)
