DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS
HeatNet Control V3
Page 105
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.
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LOCAL PUMP OFF
YES
NO/YES
YES
will shut off the local pump/valve when DHW heating is in
effect. If the boiler is running in space heating mode, the LOCAL
DELAY will be in effect before the local pump/valve shuts off.
NO
both the local and the DHW pump/valve will be enabled during
DHW heating.
LOCAL DELAY
5 Seconds
0-600 Seconds
Seconds
is the time in seconds that the local pump/valve will remain
on after the DHW pump/valve is enabled before shutting off. This is
part of the changeover process when the boiler was running in space
heating mode and now needs to provide DHW heating.
This timer may also be used for race conditions when operating
valves. The Local Pump Flow Prove time would be used to prove
flow, but with valves, the local valve may still have flow when the
DHW valve begins to open. This would cause a flow fault when the
local valve closes and the DHW valve still has not opened.
The way it works, is that these timers work in parallel, but this timer
only counts down when flow is present. It stops counting down when
flow stops, but will not cause a flow fault until its time expires. The
Local Pump Flow Prove timer counts down, but normally when flow
occurs, it proves and the boiler is allowed to run. This local delay
timer would then take over instead of allowing the boiler to run, and
wait until its time expires before allowing the boiler to start. This
timer proves that there is flow, whether interrupted or not, for x
(setting) seconds. If pumps are used, this value can be set to a few
seconds.
PURGE TO
TANK
TANK, SPACE
TANK
will keep the DHW pump/valve enabled for the DHW POST
PURGE time thus purging some of the boilers heat into the tank.
SPACE
will turn off the DHW pump after 5 seconds and enable the
local pump/valve when a DHW heating cycle completes. This allows
dumping some of the remaining heat from the boiler into the heating
space (dump zone) and preventing the tank from overheating.
HYBRID SENSOR
OFF
OFF, SUPPLY,
DHW, RETURN
Hybrid mode sensor for DHW method 5A
OFF
This sensor is selectable for DHW Method 5A only.
SUPPLY
In DHW Method 5A will maintain the DHW setpoint at
the supply sensor when the OR OVR input is closed.
DHW
In DHW Method 5A will maintain the DHW setpoint at the
DHW sensor when the OR OVR input is closed. This sensor is
optional and needs to be added. It can be moved around and placed
in the Tank, pipe feeding the tank, or other location to maintain a
setpoint at that location.
RETURN
In DHW Method 5A will maintain the DHW setpoint at
the RETURN sensor when the OR OVR input is closed.
