Xylem Bell & Gossett Ecocirc+ 20-18, Installation, Operation And Maintenance Manual

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Position Operating mode LED status Description
Performance curve:
• 1. Low
• 2. Intermediate
• 3. High
Operation at constant
pressure
- This position is selected for in-
floor heating systems.
The pressure stays constant,
when the water flow is
increased or decreased.
Performance curve:
• A. Low
• B. Intermediate
• C. High
Operation at
proportional pressure
- This position is selected for two-
pipe heating systems.
The pressure changes
according to the actual demand
for heat.
The performance is selected
according to the features of the
system or heat demand.
Constant pump speed:
• I. Low
• II. Intermediate
• III. High
Operation at constant
pump speed
- This position is selected for one-
pipe heating systems.
The speed stays constant, when
the water flow is increased or
decreased.
The speed is selected according
to the features of the system or
number of valves that can be
opened at the same time.
eAdapt eAdapt Green This position is selected to
optimize the energy
consumption by identifying the
ideal duty point.
Air purge Blinks green This position is selected to
remove the dissolved gases
from the pump.
The air purge must be done for
3 minutes.
If necessary, allow the air purge
for more than 3 minutes
according to the features of the
system.
Night - This position is selected to
decrease the energy
consumption of the pump,
when the heating system is
switched off.
The pump returns to the
original duty point when the
system restarts and the water
temperature increases.
For more information, see
Set
the night mode on page 23.
5 Operation
22 20-18 Installation, Operation, and Maintenance Manual