eZV-440 Version 2.1 Application Guide
Page 30 of 67
Document Edition 2.5
Always Constant
The fan always runs regardless of the
heating or cooling demand in the
space.
Occupied/Unoccupied Override
The fan runs constantly during the
occupied and unoccupied override
occupancy modes. Outside of these
modes, the fan runs intermittently.
Occupied/Unoccupied Override
Standby
The fan runs constantly during the
occupied, unoccupied override
occupancy and standby modes.
Outside of these modes, the fan runs
intermittently.
Always Intermittent
The fan does not run constantly at all
and only turns on when heat is
required.
•
Manual Fan Occupancy Interlock. This field is not applicable for VAV and VVT
systems.
•
HeatxFanMin. These fields display the fan speeds that will run at a specific heat
stage (“x” is the stage number). For ductal heat outputs, with multi-speed fans,
“1” is the default value. With ECM fans, FanMinSpeed (see the section below) is
the default value. “0” is the default value for non-ductal outputs.
When you modify these values, the fan speed associated with that output is
changed.
For example, if you enter “3” in Heat2FanMin, the fan will respond to the heating
demand at Heat 2 stage by increasing to fan speed 3.
•
FanMinSpeed. The minimum supported supply fan speed. This field is enabled
when you select analog control type for supply fan with a default value of 20%.
When you select a binary control type for a single or multi-speed fan, this field
displays the minimum supported fan speed with a default value of 1 for ductal
fans.
•
FanMaxSpeed. The maximum supported supply fan speed. This field is enabled
when you select analog control type for supply fan with a default value of 100%.
When you select a binary control type for a single or multi-speed fan, this field
displays the maximum supported fan speed.