HeatNet Smith Series, Руководство пользователя, Страница: 44 / 82

CALIBRATION HeatNet Control REV 1.38-1
Page 44
Calibration
A detailed startup and walkthrough of the calibration and H-
Net setup is provided in the Programming Examples
manual.
The calibration of the Smith-Series
boiler should only be performed by a
licensed technician
.
To enter the calibration menus, place the S2 switch on the
main control board to the CAL position.
Be sure to set this switch back to NORM when the
calibration is complete, otherwise no external control inputs
will work (except T1-T2), the display will always indicate
CALIBRATE and some of the runtime temperatures will
not be displayed.
The MIN VFD setting, the MAX VFD setting, and the
Ignition setting can be adjusted in the calibration displays
.
The values can be changed while running ONLY IN
MINIMUM FIRE
(any, but only one of the T inputs
closed). Prior to ignition, the values may be changed, but
the blower will not operate.
Press the arrow keys until MIN VFD is shown in the
display, along with the minimum percentage value at
which the boiler is to run at min fire. While in Standby
(no call for heat on inputs), the minimum percent may be
preset. To set the minimum rate while running, any (1),
and only (1) of the (T) inputs must be closed in order to
set the boiler to MINIMUM fire. Press the ENTER key
for approximately 1 second. The Percentage value will
start flashing, indicating that it can be adjusted. Adjust
the Minimum value to the desired setting using the arrow
keys. The Minimum setting is clamped to its lowest rated
setting and cannot be adjusted below this. Once you are
done with this setting, press the ENTER key until the
value stops flashing. The new setting is now saved.