Technical Data - Grundfos ALPHA series Installation And Operating Instructions Manual

12. Technical data

Supply voltage:
1x115V +/-10 %, 60Hz.
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) ]
+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)
Max. [°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 system, it is
recommended to keep the liquid
temperature below +149 °F (+65 °C)
to eliminate the risk of lime
Caution precipitation.
Maximum glycol concentrations:
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
AutoADAPT
3
and a
Min. Max.
III 39W 45W
II 15W 30W
I 5W 8W
8W 45W
14W 45W
22W 45W
5W 45W
9