Xylem ECOCIRC XL, XLplus Electronic drive - Manual (Page 11)

 The “night condition” can be detected with
good confidence if a higher-level control
system
is set to change the supply
temperature
When Night Mode is active, by short pressing the
Control mode button
 as described in par. 4.3.3, the
indicator is permanently lit
The Night Mode can be active in combination with
each one of the Control Modes described in par. 4.3.3
This function reduces the power consumption of the
circulator to the minimum when the heating system is
not running; an algorithm detects the proper working
conditions and automatically adjusts the speed of the
pump.
The pump returns to the original set point as soon as
the heating system restarts.
4.3.4.2 Air Purge
At each power-on, the drive performs (factory default)
an automatic Air Purge procedure, with the aim of
flushing air pockets from the circulator housing.
The Air Purge cycle will run the pump at fixed speed
for a predetermined length of time, followed by a
shorter period of minimum speed; this cycle will be
repeated 4 times (in total around 60sec), with the
message 4dG (
10
) or 4DEG (
11
) reporting the
corresponding decrementing counter (as described in
par. 3).
Referring to
Figure 10 (in case of plug-connected
models) and to Figure 11 (in case of terminal-
connected models),

the Air Purge can be skipped or started up (at
any time) by short pressing (for around 2 sec)
both the Setting buttons
 (Up and Down
arrow) together

the Air Purge can be permanently enabled or
disabled (at any time) by long pressing (for at
least 10sec) both the Setting buttons
 (Up
and Down arrow) together: by this operation, in
case of Air Purge initially enabled (factory
default), after 10sec the drive will display the
message DGOf (
11
). On the contrary, in
case of Air Purge initially disabled, after 10sec
the drive will display the message DGOn
(
11
).
4.3.4.3 Keypad Lock
Keypad Lock is a function with which the drive disables
all the buttons of the Control Panel, but maintains
running all the indicators and the numeric display.
The Control Panel can be locked/unlocked by pressing
simultaneously, and for two seconds, the Parameter
button
 and the Up arrow button  .
In any case, the drive will automatically lock the user
interface after 10 minutes from the last button
pressure.
10
On plug-connected models
11
On terminal-connected models
Once the lock is active, by pressing any button the
drive displays the symbol

(
10
) or

(
11
);
unlocking the Control Panel, the drive will display the
symbol

(
10
) or

(
11
).
4.3.5 Sub-Menus (Parameters)
4.3.5.1 Dual Pump Operations settings
Each electronic drive (model ecocirc XLplus only) can
be configured for being coupled with another one, so
that they start working in concert in dual pump
operations.
The dual pump operation is factory configured in case
of a twin-head pump, but can be set up even in case of
a spare part drive or if i
t’s necessary to have 2x single-
head pumps working in concert.
Prerequisites:

2x single-head pumps available with same part
number

3-wire bus cable, wired through the terminals
 ,  and  as described in par. 2.4 and par.
2.5.6, connecting the 2x single-head pumps
For a correct automatic configuration, follow the
subsequent procedure, setting first the pump selected
to be the master of the couple
1. Switch on the power supply to both the pumps
2. After few seconds, the drive will display the
message SIN (
10
) or SING (
11
).
3. While this message ( “SIN” or “SING”) is
displayed, press shortly one of the Setting
buttons
 , in order to configure the circulator
as:

Single Head Pump (factory default): the
message SIN (
10
) or SING (
11
) is
flashing onto the Numeric Display 

Twin (Dual) Slave Pump: the message
TSL (
10
) or TUSL (
11
) is flashing onto
the Numeric Display 

Twin (Dual) Master Pump: the message
TNA (
10
) or TUNA (
11
) is flashing onto
the Numeric Display 
4. Press shortly the Parameter button  to
confirm and store the value selected
The Numeric Display
 stops flashing.

In case of Single Head Pump or Twin
(Dual) Slave Pump, the configuration is
finalized and the drive will proceed to the
next step as described in par. 3, step 2.

Only in case of Twin (Dual) Master
Pump, a new sub-menu is made available
(as described in the next steps) for setting
the dual pump operation
5. After few seconds, the drive will display the
message bUp (
10
) or bCUP (
11
).
6. While this message ( “BUP” or “BCUP”) is
displayed, press shortly one of the Setting
buttons
 , in order to configure the dual pump
operation as: