DHW METHODS
HeatNet Control V3
Page 33
B.
The System pump on the MASTER boiler
functions as a global pump and remains on as
long as the heat demand is enabled.
C.
The DHW pump will remain on until the last
boiler on the network has stopped firing and the
post-purge time has expired.
7.
Now, in order to be a MASTER boiler, it must have a
Header sensor. In method 1, DHW Only, we will
employ the DHW sensor (J10-A, 9 & 10) in this
system instead of a Header sensor.
USE SENSOR
in
this example will be set to
YES.
This will allow the
boiler to control the DHW tank or system loop
temperature as a MASTER boiler using the DHW
sensor. The upper and lower differential temperatures
will also be loaded.
8.
The
SHARING
function is not applicable in “DHW
Only” set-up.
9.
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 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.
The MASTER’s DHW relay will remain on as long
as there are boiler’s firing and the DHW
temperature is below the (DHW SE
UPPER BAND). Once all boilers are off and the
DHW temp is equal to or above the (DHW
SE UPPER BAND), the DHW pump
will begin its post-purge time. If during this post-
purge time the DHW temp falls below the (DHW
SE UPPER BAND), the DHW pump
will remain on.
10.
Menu item
:
PURGE TO:
will be displayed.
Set the
PURGE TO:
setting 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 should only be used for
COMBINATION
and
DHW LOCAL
heating
.
Now in the,
SETTINGS: DISTRIBUTED CONTROL:
MASTER TYPE
select
DHW Only
.
JPS1 MUST be cut on all boilers
providing DHW.
Summary of Contents for FUTERA XLF Series
Page 27: ...CONTROL METHODS HeatNet Control V3 Page 27 Figure 25 Base loading relay...
Page 67: ...WIRING CONNECTIONS HeatNet Control V3 Page 67 Figure 49 Jumper Dip Switch Locations...
Page 73: ...WIRING CONNECTIONS HeatNet Control V3 Page 73 Figure 57 Temperature sensors...
