Brochure

2. Performance range
2.1 ALPHA2 15-55 performance range and operating mode selection
The shown hydraulic performance is without a check valve.
0
0
2
2
4
4
6
6
8
Q [US GPM]
AUTO ADAPT
8
10
10
12
12
14
14
16
16
18
18
20
22
Operating range
(max. - min.)
TM074554
Push-button
• Each time you press the push-button, the circulator setting is changed.
TM061857
High constant speed
• Runs at a constant speed and consequently on a constant curve.
• At Speed III, the pump is set on the maximum curve under all operating conditions.
• For quick venting, set the pump to Speed III for a short time.
TM073288
Medium constant speed
• Runs at a constant speed and consequently on a constant curve.
• At Speed II, the pump is set on the medium curve under all operating conditions.
TM073287
Low constant speed
• Runs at a constant speed and consequently on a constant curve.
• At Speed I, the pump is set on the minimum curve under all operating conditions.
TM073286
Constant pressure I
• The duty point of the pump will move left and right along the lowest constant-pressure curve depending on the
water demand in the system.
• The pump head (pressure) is kept constant, irrespective of the water demand.
TM072406
Constant pressure II
• The duty point of the pump will move left and right along the middle constant-pressure curve depending on the
water demand in the system.
• The pump head (pressure) is kept constant, irrespective of the water demand.
TM072407
Constant pressure III
• The duty point of the pump will move left and right along the highest constant-pressure curve depending on the
water demand in the system.
• The pump head (pressure) is kept constant, irrespective of the water demand.
TM072408
AUTOAdapt (factory setting)
• This function automatically controls the pump performance within the defined performance range, automatically
adjusting the pump performance to system demands over time.
TM061858
Manual summer mode
• The pump is stopped to save energy, and only the electronics are running.
• To avoid liming and blocking of the pump, the pump is started every 24 hours for two minutes at a low speed.
TM061857
(Hold for three seconds)
ALPHA
2
8
Performance range