WattMaster WCC II - Manual (Page 126)

Section 3: Screen Descriptions
WCC II Operator’s Guide
Operator Interfaces 3-94
Description:
A short message is entered here to help you remember what the
reset schedule is used for.
As _____ varies from: _____ to _____
The fi rst input on this line is the value that is to serve as the analog
input for the Reset Screen. For example, assume that we want
to reset hot water temperature based on outside air temperature
according to the following reset schedule:
O.A. Temperature H.W. Temperature
0 ºF 200 ºF
60 ºF 80 ºF
The analog input value is the outside air temperature sensor in the
above example. The outside air temperature sensor is entered as
“1A5” which means that the sensor is connected to channel #5
on satellite controller #1. Global analog values (GAn) can also be
entered at this location.
The next two inputs on this line designate the range for the input
value. In our example the outside air temperature range is from
0 º to 60 º.
Adjust the setpoint(s) of _____
This input designates the location of the control output which is to
have the setpoint adjusted. In our example, it is the location of the
output which controls the hot water valve. “1k3h” means that the
hot water valve is controlled by channel 3 of satellite controller #1.
The last letter in this input is either an “h” or a “c.” If channel 3
on satellite controller is programmed using the EA Driver Screen,
“h” is entered as the last letter. If channel 3 was programmed using
Dual Limit Screens, “h” means the contact in the satellite controller
which makes the “COM” to “H” terminals, and “c” means the
contact in the satellite controller which makes the “COM” to “C.”
--------------Setpoints to be Affected--------------
On Off Alt. Alt.
Schedule Schedule On Sch. Off Sch.
EA Driver *
Designate Setpoint to be Affected (*)
An asterisk (*) is placed under the setpoint that is to be changed
according to the reset schedule. In the above example, the On
schedule setpoint is reset with outdoor air temperature.
The “EA Driver” input on this line is a choice fi eld which allows
you to “tell” the system what screen has been used for the device
being controlled (i.e. hot water valve). Since this is a choice fi eld,
the choices will appear on the bottom of the screen.
CHOICES:
To make your selection, use the arrow keys to move the cursor to
this fi eld, then press the
once for each choice. When
the desired control type appears, press .
EA Driver
EA Driver means that the binary outputs which are being used to
control the output device (i.e. hot water valve) are programmed
using the EA Driver Screen. An EA Driver Screen has the following
setpoints available:
On Schedule: 160 ºF Alternate On: 0.0 ºF
Off Schedule: 120 ºF Alternate Off: 0.0 ºF
Dual High/Dual Low
Dual High or Dual Low means that the binary output which is
being used to control the output device (i.e. hot water valve) is
programmed using the Dual Limit Screen. The Dual Limit Screen
has time following setpoints available:
Low Limit High Limit
On Schedule CLOSED Between -------- & 130 ºF
Off Schedule CLOSED Between -------- & 120 ºF
Alt On Schedule OPEN Between 0.0 & 0.0 ºF
Alt Off Schedule OPEN Between 0.0 & 0.0 ºF
“Dual Low” is selected if the Low Limit setpoints are to be reset,
and “Dual High” is selected if the High Limit setpoints are to be
reset.