RBI FUTERA XLF Series, Control Manual

Page: 92 / 128

DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3
Page 92
DOMESTIC HOT WATER
DHW BOILER? NO
NO/AUTO, LOCAL,
COMBO
Setting this value to LOCAL or COMBO 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 stat 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.
COMBO 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 OA 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.
DHW SETPOINT
160

F 40
– 200

F
Setpoint that the boiler/system will target when a call for DHW.
LOWER DHW DIFF
5

F 1
– 30

F
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
COMBO.
UPPER DHW DIFF
3

F 1
– 30

F
DHW SEUPPER 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 COMBO
DHW PRIORITY NO
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.
POST PURGE 120s 0-600 secs
This is the time that the DHW relay remains on after the DHW call
ends.
USE SENSOR? NO
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.
SHARING OFF
OFF, NO CYCLE,
CYCLE
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
DHW heating. When this happens, the boiler will not shut down, but
keep running during the change from space heating to DHW (Hot
Swap). Once the DHW cycle completes, the boiler will shut down
and wait to be called for space heating again.
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
DHW heating. When this happens, the boiler will shut down and exit
the space heating mode. The boiler will then re-start as a DHW
heating boiler. Once the DHW cycle completes, the boiler will shut
down and wait to be called for space heating again.