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21.1.6
DOMESTIC HOT WATER (DHW) NIGHT SETBACK ON AND OFF TIMES
These are the times at which the DHW Night Setback Offsets become active and inactive. There are seven (7) stop
times and seven (7) start times each for the DHW night setback functions. Any start or stop time may be set to any
time during the week. When a start time and a stop time are programmed for the same day and time, the stop time
has priority (this is how a start time can be disabled). The installer can access the DHW Night Setback start and stop
times by accessing the DHW NSB On/Off Times parameter. These settings can be adjusted as follows:
1.
When the screen is first accessed, start and stop triggers 1 are displayed. If a different trigger number is
desired, rotate the NAVIGATION dial until the desired trigger number appears. Once it is found, press the
NAVIGATION dial to adjust the start and stop times. The day of the week for the start time will flash.
2.
Rotate the NAVIGATION dial to adjust the day of the week of the start trigger. Once it is set to the desired
day of the week, press the NAVIGATION dial again. The start time hour will flash.
3.
Rotate the NAVIGATION dial to adjust the start time hour to the desired time. Press the NAVIGATION dial
again. The start time minutes will flash.
4.
This process may be continued until the start and stop days and times are adjusted as desired. When
finished with this set of triggers, press the [SAVE] key.
5.
Rotate the NAVIGATION dial to select another set of start and stop triggers, or press the [EXIT] key to return
to the previous menu.
21.1.7
NIGHT SETBACK OVERRIDE
Any Night Setback On trigger currently active or scheduled within the next seven (7) days can be skipped. To skip a
trigger, go to the Night Setback Status Screen and press the SKIP button. Rotate the NAVIGATION dial until the
arrow (>) is next to the trigger you wish to skip. Press the NAVIGATION dial once. "SK" will appear next to that
trigger to indicate that it will be skipped. You can restore an upcoming trigger by selecting that trigger, and pressing
the NAVIGATION dial again. The "SK" next to that trigger will disappear.
To save any changes and return to the Home Screen, press the RIGHT SELECT [HOME] key. To return to the Status
Screen without saving the changes, press the LEFT SELECT [EXIT] key.
21.1.8
DISPLAY TIMEOUT
This is the time in which the display remains illuminated. The range is 10 seconds to 10 minutes. The default is 10
minutes.
21.1.9
DISPLAY CONTRAST
The contrast of the LCD display can be adjusted to improve readability. The contrast is adjusted automatically when
the display board is tested at the factory, but different ambient conditions may warrant changing the setting. This
parameter can be changed by accessing the Display Contrast setting. The range of this parameter is -10 to +10. The
default setting is 0.
21.2
DATA LOGGING
21.2.1
RESET LOG ERRORS
The reset log errors function clears the last 10 errors log.
21.3
FUNCTIONS
21.3.1
SERVICE MODE DELAY
By pressing the pin button on the front of the display for five (5) seconds, the control will be placed in Service Mode.
This will override all other heat demands. The Service Mode allows the installer to set the unit to any firing rate for the
purpose of combustion analysis. The delay sets the length of time the water heater will stay in the Service Mode if no
keys have been pressed before going back to its original state. This parameter can only be changed by the installer
by accessing the Service Mode Delay parameter. The time range of this parameter is 1 to 10 minutes. The default
value is 10 minutes.
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