Delta Controls
Document Edition 4.1
Page 19 of 41
Day Differential (AV9) –
This is the differential setting between the
Day Setpoint
and the internal Heating Setpoint (which
is used for heating control), and between the
Day Setpoint
and the internal Cooling Setpoint
(which is used for cooling control). The one value is used for both, one on each side of the
Day
Setpoint
. Refer to the diagram on page 16.
The purpose of this setting is to separate heating from cooling so as to prevent overlap, and to
create a reasonable null zone, within which no modulating control takes place – preventing
unnecessary actuator wear when the measured value is close to or on setpoint. The value for Day
Differential can be set in the Configuration Menu, or by commanding the variable (via GCL+ or
ORCAview OWS or 3
rd
Day Heating Setpoint (Internal)
Party devices).
This is the setpoint used internally for heating control (which is the
Day Setpoint
-
Day
Differential
). This value is not directly adjustable. It can only be adjusted by setting either the
Day Setpoint
or the
Day Differential
.
Day Cooling Setpoint (Internal)
This is the setpoint used internally for cooling control (which is the
Day Setpoint
+
Day
Differential
). This value is not directly adjustable. It can only be adjusted by setting either the
Day Setpoint
or the
Day Differential
.
Night Heating Setpoint (AV10)
This is the setpoint used when in N
IGHT
mode and night setback heating is required. If the current
temperature is below the current
Day Setpoint
when in N
IGHT
mode, this value will be displayed
on the BACstat LCD (depending on how setpoint display has been defined by the
Display Code
).
This value is not adjustable by a user. It can only be adjusted through the configuration menu or
by commanding the variable (via GCL+ or ORCAview OWS or 3
rd
Night Cooling Setpoint (AV11)
Party devices). Pressing the
up or down arrow will cycle to show the
Night Cooling Setpoint
.
This is the setpoint used when in N
IGHT
mode and night setback cooling is required. If the current
temperature is above the current
Day Setpoint
when in N
IGHT
mode, this value will be displayed
on the BACstat LCD (depending on how setpoint display has been defined by the
Display Code
).
This value is not adjustable by a user. It can only be adjusted through the configuration menu or
by commanding the variable (via GCL+ or ORCAview OWS or 3
rd
Party devices). Pressing the
up or down arrow will cycle to show the
Night Heating Setpoint
.
