OPTIONAL FEATURES
HeatNet Control V3 2.x
24.
Next, enter the
DOMESTIC HOT WATER
menu on
the Master boiler. Go to
BOILER MODE
and enter
LOCAL
.
25.
Change the
DHW SETPOINT
to the desired target
temperature of the water in the tank. Once the control
determines there is a call for DHW, the DHW
SETPOINT is loaded and the boiler will target the
setpoint.
26.
Now, change the
LOWER BAND
to the desired
temperature (DHW SETPOINT – LOWER DHW
DIFF) below which boilers are to be added. This setting
corresponds to the minimum water temperature
required in the tank. DHW heating will be initiated
when the DHW tank‟s water temperature is below the
temperature (DHW SETPOINT – LOWER BAND).
How long the temperature of the tank stays below the
temperature (DHW SETPOINT – LOWER BAND)
is
used to determine when boilers are started along with
the ADD BOILER DELAY TIME.
27.
Next, change the
UPPER BAND
to the desired
temperature (DHW SE UPPER BAND)
above which boilers are to be shed. This setting is the
maximum tank temperature. Setting the SHED
BOILER DELAY TIME correctly will limit the
maximum tank temperature to the (DHW SE
UPPER BAND). Setting the SHED BOILER DELAY
TIME = 0 will shut off all boilers immediately once the
(DHW SE UPPER BAND) is exceeded.
28.
Change the
DHW PRIORITY
. Setting this value
to YES will turn OFF the system pump when the
DHW mode is active (when the DHW pump is
on). Setting this value to NO leaves the system
pump on.
29.
Now got to the
POST PURGE
menu. This is the
time that the DHW pump relay remains energized
after the DHW SETPOINT has been satisfied.
A. The pump will remain on during a post
purge pump cycle until the post purge timer
expires.
30.
Now, go to the
USE SENSOR
menu and select
YES.
This will allow the boiler to control the
local tank or DHW loop temperature using the
DHW sensor. The upper and lower differential
temperatures will also be loaded.
31.
Got to
SHARING
and set it to
OFF
or
CYLE
if
the boiler is currently running in space heating
and needs to be shut down before starting up in
DHW
.
If
SHARING
is set to
NO CYCLE,
a hot swap
will occur. A hot swap is when the boiler is
running in space heating mode and does not need
to be shut down. The DHW pump will be
energized without the boiler stopping. Once the
DHW cycle has completed, the boiler will stop
and wait to be called again for either space
heating or DHW heating. A shutdown always
occurs after a DHW cycle completes.
32.
Set the
LOCAL PUMP OFF
value to
NO.
This
will leave the local pump on during a DHW
heating cycle (backwards compatibility). Setting
this value to YES will turn off or keep the local
pump off.
Setting this value to
YES,
will shut the local
pump off during a DHW heating cycle, but will
keep the local pump on for the LOCAL DELAY:
10s time before shutting off. This LOCAL
DELAY: time can be adjusted in the next menu
item by pressing the down arrow again.
33.
Set the
PURGE TO
value to
TANK.
This will
purge the heat from the boiler into the tank or
system loop. This will be done using the DHW
pump after the DHW heating cycle is complete.
If the
PURGE TO
is set to
SPACE
, once the
DHW cycle has completed, the Master will shut
the DHW pump off within a few seconds. The
SPACE
setting is to be used only for mixed
space and DHW heating.
HYB SENSOR = OFF
SETTINGS: DISTRIBUTED CONTROL:
MASTER TYPE
select
AUTO,
DHW or MIXED
(Combination)
.
NOTE:
JPS1 MUST be cut on all boilers
providing DHW.
Method 5B using a Thermostat & Sensor.
Method 5(B) can also be used in a hybrid mode on
Member
boilers with a thermostat connected to the OR
OVR input. This will enable DHW heating, and be used
instead of having the 10k sensor‟s temperature detect
when DHW heating is needed, but will use a selectable
sensor instead to maintain setpoint.
47
Summary of Contents for KN-10
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