HydroTherm HeatNet KN -6 User Information page 65

DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS
TEMP<140F
EXTEND PP TIME:
DHW BOILER?
DHW SETPOINT
LOWER DHW DIFF
UPPER DHW DIFF
DHW PRIORITY
POST PURGE
USE SENSOR?
Sharing
135F – 200F
140
0s 0-600s
DOMESTIC HOT WATER
NO NO, LOCAL, MIXED
160 F 40 – 200 F
5 F 1 – 30 F
1 – 30 F
3F
NO
120s 0-600 secs
NO
OFF, NO CYCLE,
OFF
CYCLE
screen.
Setting determines where the TEMP DISAB return sensor's
threshold temperature disables the boiler from firing.
This time may be used to remove condensation that is still present on
the heat exchanger after the boiler has finished running. The time
may be adjusted to 600 seconds(10 minutes). Unlike the 10 second
fixed post purge time the extended post purge time may be
interrupted by a call for heat.
If the extended post purge is active, an ‗*' will be displayed next to
―STANBY * ‖. This indicates that the boiler is still ready to run, but
is completing an extended post purge. As always, the STATUS
screen will display the meaning of the ‗*'. In this case: EXTEND PP.
Setting this value to LOCAL or MIXED enables the DHW PID.
Setting this value to NO disables the DHW PID.
LOCAL allows the boiler to run in DHW locally off of its own
sensor or thermostat input. The boiler could be configured to run as a
space heating boiler that is controlled by a Master. It would also
monitor a tank or DHW call and disconnect from the Master to
provide local DHW heat.
MIXED allows the boiler to be configured to run as a space heating
boiler and a DHW boiler that is controlled by a Master. This method
would use both the space heating PID and the DHW PID to
simultaneously control space heating and DHW heating.
NO, turns off the DHW PID, but still allows control of the DHW
pump and DHW setpoint for backwards compatibility.
*Note: If the System is configured to use the OR OVR input to
override the heating setpoint with the DHW setpoint, the DHW PID
is not used. Since this method does not use the DHW PID, the DHW
BOILER setting should be set to NO. The DHW SETPOINT, POST
PURGE, LOCAL PUMP OFF, LOCAL DELAY, and PURGE TO
THE: may need to be set if this method is used. This method does
allow configuring the LOCAL and DHW pumps.
Setpoint that the boiler/system will target when a call for DHW.
DHW SETPOINT – LOWER DHW DIFF: if the DHW water
temperature is less than this temperature, the Boiler/System will
enter DHW Heating mode if DHW BOILER? is set to LOCAL or
MIXED.
DHW SETPOINT +UPPER DHW DIFF: if the DHW water
temperature is greater than this temperature, the Boiler/System will
begin shutting off DHW boilers if the DHW BOILER? is set to
LOCAL or MIXED
If the DHW PRIORITY is set to YES, then when there is a call for
DHW, the system pump shuts off. If NO, the system pump stays on.
This is the time that the DHW relay remains on after the DHW call
ends.
If this entry is set to YES, the DHW 10k Sensor is looked to for
controlling DHW water temperature. If set to NO, A thermostat is
used.
NO CYCLE allows the boiler to perform as a space or DHW heating
boiler. DHW always has priority and will override (steal) a space
heating boiler that is running when none are available to perform
HeatNet Control V3 2.x
Page 65