Lochinvar Power-fin 1701 - Manual (Page 15)

Service Manual
15
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 times
If parameter A6 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).
SH Minimum set point
The SH minimum set point sets the minimum water
temperature set point that can be used for space heating
operation. The user or installer will not be able to program the
control with a lower SH set point. This parameter can only be
changed by the installer by accessing parameter B2. The
temperature range of this parameter is 32°F (0°C) to 261°F
(127°C). The default value is 70°F (21°C).
SH Maximum set point
The SH maximum set point sets the maximum water
temperature set point that can be used for space heating. The
user or installer will not be able to program the control with a
higher SH set point. This parameter can only be changed by the
installer by accessing parameter B3. The temperature range of
this parameter is 32°F (0°C) to 261°F (127°C). The default value
is 220°F (104°C).
SH Offset
The SH offset sets how many degrees above set point the
temperature has to go before the unit will shut off. This
parameter can only be changed by the installer by accessing
parameter B4. The temperature range of this parameter is 0°F
(0°C) to 54°F (30°C). The default value is 10°F (5°C).
SH Differential
The SH differential sets how many degrees below the turn off
temperature the temperature has to go before the unit will turn
on. This parameter can only be changed by the installer by
accessing parameter B5. The temperature range of this
parameter is 0°F (0°C) to 54°F (30°C). The default value is 20°F
(11°C).
CAUTION
Before changing parameters, note the
settings so that the unit can be returned to its
original operating parameters.
1
Service
(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.
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 261°F
(127°C). The feature is turned off with a setting of 32.0°F (0°C).
The default value is 32.0°F (0°C).