Lochinvar Knight 151 - 211, Руководство по обслуживанию

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1
Service
20
Service Manual
3-Way Valve Time
Not used.
C: Data Logging
Reset last 10 errors
The reset last 10 errors function clears the last 10 errors log.
D: Functions
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 either maximum firing
rate or minimum firing rate for the purpose of combustion
analysis. The delay sets the length of time the boiler 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 parameter
D1 . The time range of
this parameter is 0 to 30 minutes. The default value is 20
minutes.
Freeze Protection Pump On
The SMART SYSTEM control will turn on the boiler and
system pump outputs whenever the inlet temperature drops
below this setting. This is done to prevent the water in the
heat exchanger from freezing. Certain low-temperature
applications (such as snow melt) can operate at temperatures
around freezing, so this setting needs to be lowered in these
cases. The installer can adjust the temperature at which the
pump outputs are turned on by accessing parameter
D2 . The
minimum setting is -4°F (-20°C), and the maximum setting is
45°F (7.2°C). The default setting is 45°F (7.2°C).
Freeze Protection Burner On
If running the pumps does not prevent the inlet temperature
from falling closer to freezing, the SMART SYSTEM control
will fire the burner at low fire. The installer can adjust the
temperature at which the burner fires by adjusting parameter
D3 . The minimum setting is -4°F (-20°C), and the maximum
setting is 45°F (7.2°C). The default setting is 37°F (2.8°C).
Freeze Protection Burner Differential
Once the burner has started firing due to a low inlet
temperature, the inlet temperature must increase by this
amount before the burner turns back off. The installer can
adjust this differential by accessing parameter
D4 . The
minimum setting is 0°F, and the maximum is 20°F. The
default setting is 5°F (2.8°C).
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.
B: Temperature Settings
Space Heating (SH1, SH2, SH3) Set Point
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 32°F (0°C) to 190°F (88°C).
The default is 125°F (52°C).
Space Heating (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
190°F (88°C). The default value is 70°F (21°C).
Space Heating (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 190°F (88°C). The
default value is 185°F (85°C).
SH1 - SH3 Offset Set Point
The SH offset sets how many degrees above set point the
temperature has to go before the boiler will shut off. This
parameter can only be changed by the installer by accessing
parameters
B4 , B7 and B10 . The temperature range of these
parameters is 0°F to 20°F. The default value is 10°F.
SH1 - SH3 Differential Set Point
The SH differential sets how many degrees below the offset
the temperature has to drop before the boiler turns back on.
This parameter can only be changed by the installer by
accessing parameters
B5 , B8 and B11 . The range is 0°F to
60°F. The default is 20°F.
CAUTION
Mixing valves are required for the
protection of any low temperature loops.