Technical Data - Grundfos ALPHA Notice D'installation Et De Fonctionnement

8. Technical data

Supply voltage:
1 x 115 V, + 10 %/- 10 %, 60 Hz.
Motor protection:
The pump requires no external motor protection.
Enclosure class:
Indoor use only, IP42.
CSA Enclosure Type 2.
Insulation class:
F.
Relative air humidity:
Maximum 95 %.
Maximum discharge pressure:
150 psi (10.34 bar).
Inlet pressure:
Liquid temperature
167 °F (75 °C)
194 °F (90 °C)
230 °F (110 °C)
Sound pressure level:
43 dB (A).
Ambient temperature:
32 °F (0 °C) to 104 °F (40 °C).
Liquid temperature:
36 °F (2 °C) to 230 °F (110 °C).
To avoid condensation in the control box and
stator, the liquid temperature must always be
higher than the ambient temperature.
Ambient Liquid temperature
temperature
[°F (°C) ] Min. [°F (°C) ] Max. [°F (°C) ]
32 °F 36 °F
(0 °C) (2 °C)
50 °F 50 °F
(10 °C) (10 °C)
68 °F 68 °F
(20 °C) (20 °C)
86 °F 86 °F
(30 °C) (30 °C)
95 °F 95 °F
(35 °C) (35 °C)
104 °F 104 °F
(40 °C) (40 °C)
Min. inlet pressure
0.75 psi (0.05 bar)
4.06 psi (0.28 bar)
15.7 psi (1.08 bar)
230 °F
(110 °C)
230 °F
(110 °C)
230 °F
(110 °C)
230 °F
(110 °C)
194 °F
(90 °C)
158 °F
(70 °C)
Warning
In domestic hot water systems, it is
recommended to keep the liquid
temperature below 149 °F (65 °C) to
eliminate the risk of lime
precipitation.
Maximum glycol concentrations with clean
water:
50 % glycol @ 36 °F (2 °C).
Hydraulic performance change can be expected.
Watt readings:
Accuracy: ± 1 Watt.
Flow indicator:
Provides a relative indication of flow - should not
be used in lieu of a flow meter.
Check valve:
Use of check valve may reduce pump hydraulic
performance (up to -10 %).
Use check valve in parallel pumping
applications.
Curve conditions:
Test liquid: Airless water.
Curves apply to a density of 983.2 kg/m
liquid temperature of 140 °F (60 °C).
All curves show average values and should not
be used as guarantee curves. If a specific
minimum performance is required, individual
measurements must be made.
Curves apply to a kinematic viscosity of
0.474 cSt.
Approximate power usage:
Speed setting
High fixed speed
Medium fixed speed
Low fixed speed
Constant pressure
Constant pressure
Constant pressure
AUTO
ADAPT
3
and a
Min. Max.
III 39 W 45 W
II 15 W 30 W
I 5 W 8 W
8 W 45 W
14 W 45 W
22 W 45 W
5 W 45 W
11