eZV-440 Version 2.1 Application Guide
Page 46 of 67
Document Edition 2.5
Name of field
Description
Reset Band
The reset band provides a dynamic means to adjust the amount of output
bias added to the controller output.
When the input is outside of the reset band, the effective reset rate is equal
to the specified reset rate. When the input is within the reset band, the
effective reset rate is proportionally reduced. When the input is within the
deadband, no further reset action occurs.
OAT Htg Lockout
Outdoor Air Temperature Heating Lockout Setpoint: The heating system
does not operate above this outside air temperature. The default value is
99
°
C (210
°
F).
Htg Demand Limit
Heating Demand Limit is the limit placed on the heating capacity for that
zone. The limit is typically left at the default value of 100%, or is a calculated
value passed over the network from a supervisory controller.
The limit affects the heating stages in a reverse order, starting with the last
stage to the first stage.
OAT Clg Lockout
Outdoor Air Temperature Cooling Lockout Setpoint: The cooling system
does not operate below this outside air temperature. The default value
is -99
°
C (-146.2
°
F). This field is not used for the VAV and VVT systems.
Clg Demand Limit
Cooling Demand Limit is the limit placed on the cooling capacity for that
zone. The limit is typically left at the default value of 100%, or is a calculated
value passed over the network from a supervisory controller. This field is
not used for the VAV and VVT systems.
For more information about Proportional-Integral-Derivative control, see
Probing the Depths of PID Control webinar
on the Delta Controls Support
web site.
