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Installation & Operation Manual
50
10 Start-up
Set domestic hot water (DHW) operation
Verify DHW circulator mode
The DHW Mode is programmed to heat an indirect domestic
hot water tank. When the tank thermostat calls for heat, the
SMART SYSTEM control will turn on the DHW pump and turn
off the boiler pump (if running). If the system pump is
running, it will remain on. When the DHW call for heat ends,
and there is no space heating call for heat, the DHW pump will
continue to run for a period of time. This pump delay is set at
the factory to 30 seconds. If a shorter or longer delay is desired,
the appropriate parameter in the control must be changed. See
the Knight Wall Mount Service Manual for a detailed
explanation of this procedure. If there is an active space heating
call for heat, then the boiler pump will be turned on and the
DHW pump will be turned off.
Set DHW target temperature
When in the DHW Mode, the control will modulate to maintain
the outlet temperature to a set point. This set point is set at the
factory to 180°F. If a different set point is desired, the
appropriate parameter in the control must be changed. See the
Knight Wall Mount Service Manual for a detailed explanation of
this procedure.
Set clock
The SMART SYSTEM control has a built-in clock that it uses for
its night setback feature and for logging events. This clock must
be set when the boiler is installed, and anytime the boiler has
been powered off for more than one month. Use the following
procedure to set the clock:
1. Press and hold the MENU key for at least 5 seconds.
2. The display changes to ready “ENTER MENU CODE”,
with four (4) zeros below it.
3. Change the zeros to match the user code (factory set at
“0704”). Use the UP and DOWN keys to increment or
decrement the flashing digit, and the NEXT and
PREVIOUS keys to select which digit flashes.
4. Press the ENTER key.
5. The display changes to read USER CODE for a few
seconds, then displays a menu.
6. Press the ENTER key.
7. Press the UP key twice to display “A3 DATE AND
TIME”.
8. Press the ENTER key once.
9. The date and time are displayed as “YY:MM:DD W
hh:mm”, where:
mm: minutes
hh: hour (24 hour time; e.g., 2:00 PM = 14:00)
W: day of the week (1 = Sunday, 2 = Monday,
3 = Tuesday, etc.,)
DD: date
MM: month
YY: year
NOTICE
The internal clock does not adjust for
Daylight Savings Time and therefore, will
require a manual adjustment.
Use the UP and DOWN keys to increment or decrement the
flashing number, and the NEXT and PREVIOUS keys to select
which number flashes.
10. Press the ENTER key to save the setting.
11. Press the MENU key twice to exit the Programming
Mode.
Configuration of the cascade
When installed in a Cascade system, the individual controls
must be programmed for cascade operation. This is
accomplished by accessing the control parameters.
Input the Installer code as described in the Knight Wall Mount
Service Manual. Once the control parameters have been
accessed, use the DOWN arrow key to select the H Control
Mode parameters. Press the ENTER key to access these
parameters. Use the UP arrow key to access parameter H2 SH
Source. Press the ENTER key to access this parameter. Use the
DOWN arrow key to select Cascade. Press the ENTER key to
program this into the control.
Press the UP arrow key to select the parameter H3 BLR Address.
Press the ENTER key to access this parameter. Each unit in the
Cascade system must be programmed with its own address. The
boiler designated as the Leader will have an address of 0. The
remaining boilers in the Cascade will be Members and have
addresses from 1 - 7. Use the UP and DOWN arrow keys to select
the appropriate address. Press the ENTER key to program this
into the control.
Press the MENU key twice to exit the control parameters. Repeat
this procedure for all boilers in the Cascade, designating the
Leader control and the Member controls.