STP SERIES Install, Operation, and Maintenance Manual
SECTION 3: OPERATION AND CONTROLS
Page
38
of
97
Diversified Heat Transfer, Inc.
•
439 Main Road
•
Towaco, New Jersey 07082
Rev-1
09/11/2019 PHONE: 800-221-1522
•
WEBSITE: www.dhtnet.com
STP Manual
3.12 PROGRAMMING SEQUENCE
ENTERING THE PASSWORD
1.
Some of the display screens have password protection for proper operation of the water
heater. The figure below shows the login screen on HMI display and operator level login
information which is required to make any adjustments to the default factory settings:
2.
Click on required empty box inside the touchscreen display and a keypad appears on the
screen. Use this keypad to enter the access login name and password.
NOTES:
1. Use default operator level User Name “L1” and password “0439” to gain access.
2. A time-out applies to logout within a timeout period (default is 30 min.) and the
controller automatically logs out to save the recent setting adjustments.
DISPLAY SCREENS AND ADJUSTMENTS
3.
The STP Series default “HOME screen” as explained in Section 3.9.1. Factory default
domestic hot water set point is 140
°
F. This screen shows the adjustable domestic water
set point as well as currently measured domestic outlet temperature, domestic inlet water
temperature and control valve output open percentage.
4.
The domestic hot water set point can be adjusted anywhere within the range of 35-180
°
F
by entering the operator level password as shown in steps 1 and 2 above.
5.
The high temperature alarms are default set to 20
°
F above the set point. If domestic water
outlet temperature reading is equal to or higher than this number, the unit status changes
from green to red in color and “HIGH TEMP ALARM” message starts flashing in red color
on the center top side of the HOME screen with active sound alarm. Controller will close
