SATK22
18
Circulator - Curves and Settings
The HIU is equipped with a Grundfos circulator model UPM3
AUTO-L 15-70.
By default, the circulator setting is with the maximum
proportional head characteristic.
Pressing the front key briefly produces the sequence of LEDs
corresponding to the selected hydraulic characteristic. A couple
of seconds after pressing the key, the circulator again produces
a sequence of LEDs showing the instantaneous power
consumption:
•
1 yellow LED lit: power between 0 and 25% of P
max
;
•
2 yellow LEDs lit: power between 25 and 50% of P
max
;
•
3 yellow LEDs lit: power between 50 and 75% of P
max
;
•
4 yellow LEDs lit: power between 75 and 100% of P
max
.
To change the characteristic, hold down the front key for more
than two seconds and then press the same key repeatedly until
reaching the required characteristic (refer to the adjacent
figure).
Having identified the required characteristic (head - flow rate
chart shown below) wait for about ten seconds for the setting
to be accepted by the circulator, which will then revert to the
sequence of LEDs showing power consumption.
A long press of the front key (>10 seconds) locks the pump
setting, preventing possible incorrect modifications of the
curve.
Unlocking can be done in the same way, with a long press
(>10 s) of the front key.
The pump also has a self-diagnostics system to reveal any
possible operating problems.
Any problem detected is shown by a sequence of LEDs:
PERFORMANCE
2 s.
SELECTED SETTING
C
CURVE TYPE
PROPORTIONAL
PROPORTIONAL
PROPORTIONAL
CONSTANT
FIXED SPEED
FIXED SPEED
FIXED SPEED
FIXED SPEED
CONSTANT
CONSTANT
LED SEQUENCE
CURVE TYPE
LED SEQUENCE
CURVE TYPE
LED SEQUENCE
ALARM STATUS
Blocked
Supply voltage low
Electrical error
H (m w.g.)
G (m
3
/h)
p (bar)
0.6
0.4
0.3
0.2
0.1
0
2.5
2
1.5
0.5
0.5
3.5
3
1
6
4
3
2
1
5
7
0.7
0.8
8
Constant head
Proportional head
Constant speed
Factory setting
