Technical Data; Operating Conditions - Grundfos ALPHA2 Instructions D'installation Et D'utilisation

10. Technical data

10.1 Operating conditions

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 humidity
Maximum 95 %.
Maximum outlet 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.
Liquid temperature
Ambient
temperature
Minimum
[°F (°C) ]
[°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)
Minimum
inlet pressure
0.75 psi (0.05 bar)
4.06 psi (0.28 bar)
15.7 psi (1.08 bar)
Maximum
[°F (°C) ]
230 °F
(110 °C)
230 °F
(110 °C)
230 °F
(110 °C)
230 °F
(110 °C)
194 °F
(90 °C)
158 °F
(70 °C)
In domestic hot water systems, keep
the liquid temperature below 149 °F
(65 °C) to eliminate the risk of lime
precipitation.
Glycol
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 a check valve may reduce pump
hydraulic performance (up to - 10 %).
Use a 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
constant III
speed
Medium
constant II
speed
Low
constant I
speed
Constant
pressure
Constant
pressure
Constant
pressure
AUTO
ADAPT
3
and a
Minimum Maximum
39 W 45 W
15 W 30 W
5 W 8 W
8 W 45 W
14 W 45 W
22 W 45 W
5 W 45 W
19