OPTIONAL FEATURES
HeatNet Control V3 2.x
This time includes the DHW post purge of the DHW
pump/valve.
9.
Go to the
POST PURGE
menu item. This is the time
that the DHW pump relay remains energized after the
DHW SETPOINT has been satisfied. Once the tank
has exceeded the DHW SE UPPER BAND
temperature and this DHW boiler has shut off (DHW
SHED BOILER DELAY TIME), the post purge time
will begin.
10.
Now, go to
USE SENSOR
Select
YES.
This will
allow the boiler to control the tank or DHW loop
temperature using the DHW sensor. The upper
and lower band temperatures will also be loaded
when set to YES.
11.
The next menu is the
SHARING
menu. Sharing
determines what happens when a DHW boiler is needed
and none are available (all boilers are running is space
heating and DHW heating). This means the Master
needs to steal a space heating boiler that is running or
no more boilers can fire in DHW.
OFF
Is first come first serve. If a Boiler is not
available because all boilers are firing, the DHW
firing algorithm waits until one becomes
available, even though at least one is running as a
space heating boiler. If a space heating boiler is
needed, a DHW running boiler cannot be stolen
for space heating.
Space heating has priority
when DHW is trying to steal
.
CYCLE
The
DHW algorithm can steal a space heating
boiler and fire it as a DHW boiler. The space
heating boiler
stops
and then restarts as a DHW
boiler.
DHW has priority.
NO CYCLE
The DHW algorithm can steal a boiler
that is already running as a space heating boiler.
Instead of shutting down the space heating boiler,
it does a hot swap, engaging the DHW pump and
leaving the local pump running or shutting it off.
Use this in conjunction with the
LOCAL PUMP
OFF:
and the
LOCAL DELAY
: settings.
DHW
has priority
.
12.
Next is the
LOCAL PUMP OFF
menu. When a DHW
heating cycle begins, what to do with the local
pump/valve is determined:
NO
The local pump/valve will remain running during
DHW heating.
YES
The local pump will shut off with a delay
determined by
LOCAL DELAY: seconds.
This
allows the DHW pump/valve to prove before
shutting off the local pump.
Piping of the system will determine which setting to
use.
13.
Go to the
PURGE TO
menu. After a DHW cycle
completes, the pump/valve can be selected to either
purge to the
TANK
, or to the
SPACE
for the duration
of the post purge time. This selection can use the space
to dump the heat from the boiler and not overheat the
DHW tank/load.
14.
Set the
HYB SENSOR = OFF
. This sensor is
selectable for Method 5A only.
15.
Finally, go to the
BOILER MODE
menu. If JPS1 has
not been cut, the selection will appear grayed out. Cut
JPS1. Once this is done, set the
BOILER MODE
to
MIXED (Combination)
. The MASTER boiler will
control the temperature in the tank using as many
boilers as it has available on H-Net along with any the
space heating needs. The boilers must be piped
appropriately for this method to function correctly.
Now set up the Member boiler(s).
BOILER MODE
Set to
MIXED (Combination)
on
MEMBER boilers, only the MASTER boiler.
DHW SETPOINT
This does not need to be set on
MEMBER boilers, only the MASTER boiler.
LOWER BAND
This does not need to be on
MEMBER boilers, only the MASTER boiler.
UPPER BAND
This does not need to be set on
MEMBER boilers, only the MASTER boiler.
PUMP PRIORITY
This does not need to be set on
MEMBER boilers, only the MASTER boiler.
POST PURGE
This needs to be set on all boilers. All
boilers control their respective DHW pump/valve
when they are called to perform DHW heating.
SHARING
This can be set on any boiler and will how
boilers will cycle on/off when they are called to
perform DHW Heating.
LOCAL PUMP OFF
This can be set on any boiler to
determine how the local pump/valve behaves
when called to perform DHW heating.
PURGE TO
This does not need to be set on MEMBER
boilers, only the MASTER boiler.
HYB SENSOR: = OFF
. This sensor is selectable
for Method 5A only.
NOTE:
JPS1 MUST be cut on all boilers
providing DHW. Cutting JPS1 limits to maximum
temperatures to 200F.
44
Содержание KN-10
Страница 107: ...107 ...
