Lochinvar Power-fin 502 - Manual (Page 11)

User’s Information Manual
11
Viewable and changeable control parameters
A: General
Heater model
The control will display “LOCHINVAR” as the model
number because the same control is used on several models.
This will be displayed when parameter A1 has been
accessed. This parameter is not changeable.
User code
The User Code allows the user to access and change a
limited number of control parameters. The access code can
be changed by the user or the installer to a code of their
choosing.
To change the code, parameter A2 must be
accessed. The default code is 0704. The code can be
changed one digit at a time by using the arrow keys on the
display.
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 unit is first
installed or any time the unit has been powered off for more
than 30 days. To set the clock, parameter A3 must be
accessed. The date and time are displayed as “YY:MM:DD
W hh:mm”. YY = year, MM = month, DD = date, W = day
(1 = Monday, 2 = Tuesday, etc.), hh = hour (24 hour time;
2:00 PM = 14:00), mm = minutes.
Night setback temperature
Once the internal clock has been set correctly, the night setback
feature can be used to program a lower water temperature set
point for space heating or tank. This parameter can be changed
by the user or the installer by accessing parameter A6. The
temperature range for this parameter is 32°F (0°C) to 140°F
(60°C). The feature is turned off with a setting of 32.0°F (0°C).
The default value is 32.0°F (0°C).
Night setback times
If parameter B6 is set to anything other than 32.0°F (0°C), the
night setback feature becomes active. This will require start and
stop times to be programmed for the days that reduced
temperatures are required. These times can be changed by the
user or the installer by accessing parameter A7. Each day of the
week (Monday through Sunday) will have an on and off time.
Example: Monday ON: 22:30, Tuesday OFF: 6:45. If you wish
to skip a day and have no night setback, leave the on and off
times the same. The default times for each day will be 08:00
(OFF) and 18:00 (ON).
B: Temperature settings (boiler only)
SH Set point user
The SH set point user sets the water temperature set point for
fixed operation or the maximum temperature set point when
the outdoor air sensor is used. This parameter can be changed
by the user or the installer by accessing parameter B1. The
temperature range of this parameter is 60°F (15°C) to 230°F
(110°C). The default value is 120°F (49°C).
C: Data logging
Hours running SH
The hours running SH parameter shows the total number of
hours the unit has been in the SH firing position.
This
parameter can be viewed by the user and the installer by
accessing parameter C1.
Hours running DHW
The hours running DHW parameter shows the total number of
hours the unit has been in the DHW firing position. This
parameter can be viewed by the user and the installer by
accessing parameter C2.
Ignition attempts
The ignition attempts parameter shows the total number of
times the unit has attempted to fire. This parameter can be
viewed by the user and the installer by accessing parameter C3.
Show last 10 errors
The control will log the 10 most current errors with the date and
time the error occurred. This parameter can be viewed by the
user and the installer by accessing parameter C4.
CAUTION
Before changing parameters, note the
settings so that the unit can be returned
to its original operating parameters.
3
SMART SYSTEM control module
(continued)
NOTICE
The internal clock does not adjust for
Daylight Savings Time and therefore,
will require a manual adjustment.
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 unit.
When a new software version
becomes available, the existing control can be replaced with
a new control to update the software.
Temperature units
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 A5. The default is °F.