STP SERIES Install, Operation, and Maintenance Manual
SECTION 3: OPERATION AND CONTROLS
Rev-1
Diversified Heat Transfer, Inc.
•
439 Main Road, Route 202
•
Towaco, New Jersey 07082
Page
33
of
97
STP Manual
PHONE: 800-221-1522
•
WEBSITE: www.dhtnet.com
09/11/2019
Display Touchscreens Navigation:
•
Home Screen:
As shown in above picture, this screen displays the real time operating
process variables along with the STP Series water heater picture. Unit operating status
is shown in green (normal operation) and red (faulty operation) colors. Alarm also
flashes on top of the screen when error/fault event occurs.
•
Trend Screen:
Data logging collects and stores values in device addresses associated
with variables. You can specify the timing for collecting data and how much data is
stored. Display real-time acquired logging data in a Trend Graph for domestic water set-
point, outlet and inlet temperature variables, and the control valve open percentage.
Logged data is automatically exported after USB memory drive is inserted in its slot
behind HMI for a backup memory or an external storage in a .txt format.
•
Alarms Screen:
When an error condition, such as over temperature or sensor failures,
etc., is detected by the controls (when value is outside the limit condition), an alarm
appears on top of the display screen. It allows user to check the alarm type, its status,
and date/time when an alarm condition is triggered.
Logged data is automatically exported after USB memory drive is inserted in its slot
behind HMI for a backup memory or an external storage in a .txt format.
•
Contact Info Screen:
displays the DHT factory and local sales representative company
address and contact information in ‘plain English’ format for ease of access. Unit and
controls serial number information is also displayed on the screen at the bottom along
with the software revision levels on the top of the display screen.
•
Setup Screen:
allows user to make changes to the factory default settings. Access to
the setup screen is password protected. There are two levels of login access and end
user level login allows operator to make adjustments to common operating process and
communication variables. Advanced settings are higher level password protected for
normal operation of the unit.
Following time-out applies to display
•
If no button presses are detected within a timeout period (default is 30 min.), the
display will revert back to the Level 0 “HOME screen.”
•
If no button presses are detected within a timeout period (default is 5min.), the display
screen turns off in order to save power, and the PID controller is operational in the
background to maintain the target domestic hot water set point. The display returns
back to life quickly with a single click on the touchscreen.
NOTE:
USB memory drive kit is installed standard inside the control panel. Contact your DHT sales
representative or DHT factory for more information about data logging
.
