Lochinvar ARMOR 151 - 801 - Manual (Page 14)

1
Service
14
Service Manual
Viewable and changeable control parameters
CAUTION
Before changing parameters, note the
settings so that the unit can be returned to
its original operating parameters.
A: General
Date and Time
The control uses an internal clock for the night setback
feature and for logging of events. For these features to work
correctly, the clock must be set when the water heater is first
installed or anytime the water heater has been powered off for
more than four (4) hours. To set the clock, parameter A1
must be accessed.
Software Version
The software version allows the user to view the software
version in use by the control. This software controls the
operation of the water heater. When a new software version
becomes available, the existing control can be replaced with a
new control to update the software.
Software version is read only.
Temperature units (°C / °F)
The control can be configured to display temperature in
either °C or °F. This parameter can be changed by the user or
the installer by accessing parameter A3. The default is °F.
Domestic Hot Water (DHW) Night Setback Offset
The unit’s internal clock can be set up to run at a lower set
point temperature during unoccupied times. When in night
setback, the control reduces the set point by a fixed amount.
It subtracts the DHW night setback offset from the tank set
point (parameter E2).
NOTE: The DHW night setback will not work without a tank
sensor installed.
The installer may adjust the DHW night setback offset by
accessing parameter A4. The minimum setting is 0°F (0°C)
and the maximum setting is 90°F (50°C).
Domestic Hot Water (DHW) Night Setback On
Times
This is the time at which the DHW Night Setback Offset
becomes active. There are 7 start times and 7 stop times.
Both may be set to any time within a 7-day week. These
settings are referred to as triggers. Multiple start or stop
triggers may be set within a single day, if desired. When a
start trigger and a stop trigger are set to the same time, the
stop trigger has priority. The installer may adjust the DHW
start triggers in parameter A5. This screen shows the start
trigger number, the day of the week, and the time of day.
1. When the screen is first accessed, start trigger number 1
is shown. If a different trigger number is desired, the
installer can rotate the NAVIGATION dial until the
desired trigger number is displayed. Once the desired
trigger number is selected, the installer can press the
NAVIGATION dial and the day of the week will start to
flash.
2. The installer can adjust the day of the week to the one he
wishes to set. Once the day is set, the installer can press
the NAVIGATION dial and the hour will begin to flash.
3. After setting the hour, the installer can press the
NAVIGATION dial and the minutes will flash. Once all
settings have been made, the installer can press the
RIGHT SELECT [SAVE] key. The installer can now
select a different trigger and adjust the settings for that
trigger.
4. Once all adjustments are made, the installer can press
the RIGHT SELECT [SAVE] key to save all of the new
settings and return to the A menu, or press the LEFT
SELECT [EXIT] key to return to the A menu without
saving the changes.
Domestic Hot Water (DHW) Night Setback Off
Times
The stop triggers for the DHW night setback feature can be
adjusted by accessing parameter A6. The adjustment
procedure for these parameters is identical to the space
heating start triggers described above.
Display Timeout
This is the time in which the display remains illuminated.
The range is 10 seconds to 10 minutes. The default is 3
minutes.
NOTICE
The internal clock does not adjust for
Daylight Savings Time and therefore,
will require a manual adjustment.
Please note that the brackets ([]) denote
screen status.
NOTICE