Resol DeltaSol BX User Manual

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
6
Drainback option
In a drainback system the heat transfer uid will ow into a holding tank if solar
loading does not take place. The drainback option initiates the lling process if
solar loading is about to start. If the drainback option is activated, the following
adjustment can be made.
Note:
A drainback system requires additional components such as a holding tank.
The drainback option should only be activated if all components required
are properly installed.
Time period – switch-on condition
The parameter tDTO is used for adjusting the time period during which the
switch-on condition must be permanently fullled.
Filling time
The lling time can be adjusted using the parameter tFLL. During this period, the
pump runs at 100 % speed.
Stabilisation
The parameter tSTB is used for adjusting the time period during which the
switch-off condition will be ignored after the lling time has ended.
Note:
If the drainback option is activated, the cooling functions and the anti-
freeze function will not be available.
Note:
The drainback option is only available in systems with 1 store and 1 col-
lector eld and if no cooling function is activated.
6
6
ODB
Drainback option
Selection: OFF / ON
Factory setting: OFF
tDTO
Time period – switch-on condition
Adjustment range: 1 … 100 s
in steps of 1 s
Factory setting: 60 s
tFLL / Filling time
Adjustment range: 1.0 … 30.0 min
in steps of 0.5 min
Factory setting: 5.0 min
tSTB / Stabilisation
Adjustment range: 1.0 … 15.0 min
in steps of 0.5 min
Factory setting: 2.0 min

Resol DeltaSol BX Specifications

General

Brand	Resol
Model	DeltaSol BX
Category	Controller
Language	English