Lochinvar WH 55 - 399 - Manual (Page 12)

User’s Information Manual
12
4
SMART SYSTEM control module
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,
press the MENU key for 5 seconds, enter the user password,
and press the SAVE key. Rotate the NAVIGATION dial to
NSB OVERRIDE, and press the NAVIGATION dial. A list
of the current (if active) and upcoming NSB On triggers will
appear. Rotate the NAVIGATION dial to select the trigger
you wish to skip and press the NAVIGATION dial. “SK” will
appear next to that trigger. You can rotate the NAVIGATION
dial again to select another trigger if you wish. If you wish to
reinstate a skipped trigger, re-select that trigger and press the
NAVIGATION dial again. The “SK” next to that trigger will
disappear. Press the HOME key to save these skipped triggers.
If you selected any currently active trigger(s), the current Night
Setback will be cancelled.
Temperature Units
The control can be configured to display temperature in
either °F or °C. This parameter can be changed by the user
or the installer by accessing the Temperature Units parameter.
The default is °F. To change the temperature units, access
the clock menu as described in the User section (page 11).
Rotate the NAVIGATION dial until the arrow (>) is pointing
to “TEMPERATURE UNIT °F”. Press the NAVIGATION
dial once. The temperature unit will begin to flash. Rotate
the NAVIGATION dial until the desired temperature unit
is shown. Save the new setting as described in the Saving
Parameters section (page 11).
Space heating (SH1, SH2, SH3) and tank set points
There are three (3) individual user set points for better zone
control. These are listed as SH1 Set Point through SH3 Set
Point. If multiple set points are calling for heat the highest set
point has priority. The range is SH Minimum Set point to SH
Maximum Set point. The default is 125°F (52°C).
By installing a tank sensor, the SMART SYSTEM control can
perform the tank thermostat function. The SMART SYSTEM
control automatically detects the presence of this sensor, and
generates a DHW call for heat when the tank temperature
drops below the tank set point differential (Tank Set point
Differential parameter), and finishes the call for heat when
the tank temperature reaches tank set point + offset. This
parameter can be changed by the installer by accessing the
DHW Tank Set point parameter. The temperature range of
this parameter is 60°F (16°C) to tank maximum set point.
The default value is 125°F (52°C).
Press the NAVIGATION dial once. A menu will appear
showing the SH1, SH2, SH3, and DHW Set Points. Rotate
the NAVIGATION dial until the arrow (>) is pointing to the
setting you wish to change. Press the NAVIGATION dial
again. The value of the selected setting will begin to flash.
Rotate the NAVIGATION dial to adjust the value. Save the
new setting as described in the Saving Parameters section
(page 11).
CAUTION
Mixing valves are required for the
protection of any low temperature loops.