2
Status Screen
5
Figure 2-1
SMART TOUCH Status Screen
To monitor and record the operation of the heater, click on
the
Status
tab along the top of the Main Screen window
(FIG. 1-1, page 4). When using the SITECS937Lab program,
you will need to choose which controller you wish to monitor.
The Status Screen will appear (see FIG. 2-1 above). The
screen is divided into several sections.
The Sensors section displays the current temperatures seen by
the Inlet, Outlet, System Inlet, System Outlet, Tank, Outdoor,
and Flue sensors. It also shows the delta T across the heat
exchanger and the voltage being applied to the 0-10Vdc input
(FIG. 2-1). The controlling sensor is shown below the items
mentioned above. The default controlling sensor is the Outlet
sensor. If a System Supply sensor is connected, the control
will automatically use it as the controlling sensor.
Below the temperature readings are Derivative Flue and
Derivative Outlet. These show how quickly these
temperatures are changing. The control will take certain
actions based on these values. For instance, if the outlet
temperature rises too quickly, the control will force the heater
to run at low fire. Finally, the 0-10Vdc input Voltage and
Flame Current are shown.
To the right of the sensor temperature readings are the various
setpoints. The SH setpoint is the setpoint the SMART TOUCH
uses during a space heating call for heat. Note that this setpoint
will depend upon the outdoor temperature if the outdoor air
sensor is connected. When the 0-10Vdc input is used, this
setpoint will vary with the input voltage if it is used to control
the setpoint. The HW setpoint is the setpoint used when a Tank
sensor is connected. The HW Mod Setpt is the outlet
temperature setpoint used when heating an indirect HW tank.
The dSP setpoint is not used. Below these is a check box
indicating if Night Setback is active or not.
Below the Sensors section is the Inputs section (FIG. 2-1). This
section displays the status of the Enable (SH Thermostat)
Input, HW Thermostat, Manual Reset High Limit, Flow
Switch/Low Water Cutoff (optional), Gas Pressure Switch,
Louver Proving Switch (optional), Air Pressure Switch, Blocked
Drain Switch, Auto Reset High Limit Switch, and the status of
the SH and DHW demands from ModBus.
Next to the Inputs section is the Outputs section (FIG. 2-1).
This section shows the status of the Boiler (secondary) pump,
System (primary) Pump, HW Pump, Blower, Gas Valve,
Run-time Contacts, and Alarm Contacts.
PC Program Instructions
