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Service
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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 the
SH1, 2 and 3 Differential Set Point
parameters.
The range is 0°F to 60°F. The default is 20°F.
3-Way Valve Time
The optional Lochinvar Multi-Temperature Loop Control
Board (MTLCB) can be used to control the supply temperature
of up to three (3) sub-loops, corresponding to each of the
three (3) SH set points, through the use of 3-way mixing
valves. To ensure the MTLCB will control these temperature
properly, it is necessary to let the control know how much
time these mixing valves require to move from the fully open
to fully closed positions. Program this time into the
3-Way
Valve Time
parameter. Since this parameter applies to all of
the mixing valves used, the actual open/close time must be
approximately the same for each one. The minimum setting
is 1 second, and the maximum setting is 255 seconds. The
default setting is 20 seconds.
Data Logging
Reset log errors
The reset log errors function clears the last 10 errors log.
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 any 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
the
Service Mode Delay
parameter. The time range of this
parameter is 1 to 10 minutes. The default value is 10 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
Freeze Protection
Pump On
parameter. The minimum setting is -3°F (-19°C),
and the maximum setting is 45°F (7.2°C). The default setting
is 45°F (7.2°C).
To save any changes and return to the Home Screen, press the
RIGHT SELECT [HOME] key. To return to the Status Screen
without saving the changes, press the LEFT SELECT [EXIT]
key.
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.
Temperature Settings
Space heating (SH) set point parameters limit boiler operating
set point. The exact boiler operating set point is calculated
using the outdoor reset curve. Outdoor reset is a feature that
increases the temperature setting of the boiler as outdoor
temperatures drop and decreases boiler set point as outdoor
temperatures rise. The outdoor reset parameters can be
accessed through the
Outdoor Reset
menu.
Space Heating (SH1, SH2, SH3) Set Point
There are three (3) individual space heating set points. These
are listed as
SH1 Set Point
through
SH3 Set Point
. These set
points provide an upper limit to the outdoor reset curve for
each zone. If multiple space heating set points are calling for
heat, the highest set point has priority. If the outdoor sensor is
not functioning, the boiler will operate at
SH Set Point
and the
display screen will indicate “Outdoor Sensor Fault”. The range
of this parameter is
SH Minimum Set Point
to
SH Maximum Set
Point
. 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 allowed for
SH Set Point (1 - 3)
adjustment. 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 the
Minimum SH Set Point
parameter.
The temperature range is 32°F (0°C) to the space heating
maximum set point. The default value is 32°F.
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 the
Maximum SH Set Point
parameter.
The temperature range of this parameter is the space heating
minimum set point to 180°F (82°C). The default value is 180°F.
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
SH1, 2 and 3 Offset Set Point
parameters. The temperature
range of these parameters is 0°F to 20°F. The default value is
10°F.
CAUTION
Mixing valves are required for the protection
of any low temperature loops.
NOTICE
Never put the Freeze Protection Pump
on a setting lower than the Freeze
Protection Burner On setting.
Outdoor Knight Boiler
Service Manual
