4 | Parameters overview
62 B1820023_en | Service handbook Lambdatronic H 3200 - T4e
4.6.2 Boiler 2 - Temperatures
Secondary boiler start delay
If there is a requirement from the heating circuit or DHW
tank and the buffer tank or boiler has insufficient
temperature, the secondary boiler starts after the specified
delay time set here.
Disable startup delay in case of fault?
Indicates whether the startup delay is ignored in the event
of a boiler fault and whether the standby boiler is activated
immediately on request.
Deactivate startup delay when boiler is switched off?
Indicates whether the startup delay is ignored when the
boiler is switched off and whether the standby boiler is
activated immediately on request.
Backup boiler start, if buffer tank top temperature
is below
If the temperature in the top part of the buffer tank falls
below the specified value, the backup boiler is started
once the set duration has elapsed.
Start standby boiler only according to storage tank
top
Standby boiler enabled after temperature decreases
below minimum temperature on top buffer tank. No
consumers are taken into consideration.
Secondary boiler minimum runtime
If the secondary boiler is started, it will run for at least the
length of time set here.
No heat pump operation when outside air temperature
less than
Prerequisite: Heat pump as standby boiler
The heat pump stops working below the set temperature.
This avoids operation with high energy consumption when
the temperature outside is cold.
Maximum outfeed temperature for heat pump
operation
Prerequisite: Heat pump as standby boiler
If a flow temperature higher than the set value is required,
the main boiler takes over.
Main boiler minimum runtime
Prerequisite: Heat pump as standby boiler
If the main boiler is in operation, it only shuts down after
the minimum runtime of the main boiler if the criteria for
heat pump operation are fulfilled. This should prevent
excessively short runtimes of the main boiler.
Minimum temperature of secondary boiler
When the secondary boiler reaches the specified
temperature, the loading pump is started and switches the
isolating valve.
Temperature difference between secondary boiler and
buffer tank
Temperature difference between secondary boiler and
upper temperature in layered tank to activate the loading
pump of the secondary boiler.
Oil valve shut delay
If the current boiler temperature of the backup boiler falls
to less than the value that is set under „Minimum
temperature of backup boiler“ the isolating valve does not
trip until the set duration has elapsed.
Backup boiler delivery temperature
Prerequisite: Hydraulic system 3 in conjunction with a
manually loaded backup boiler
If the backup boiler exceeds the specified temperature,
the isolating valve switches and skims the boiler.
Main boiler startup delay
Prerequisite: Backup boiler is manually fed
Specifies the delay time after which the main boiler is
permitted to start again.
Close delay for isolating valve
Specifies the delay time after the shutdown of the backup
boiler. After the set time the valves switches back to the
main boiler. This allows the backup boiler it has a certain
period during which it can be warmed up after it was shut
down.
To Next Page
Loading...
