Brochure

5.1.3 Operating conditions, ALPHA 15-55
HWR-D models
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 temp. Min. inlet press.
[°F (°C)] [psi (bar)]
167 (75) 0.75 (0.05)
194 (90) 4.06 (0.28)
230 (110) 15.7 (1.08)
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)
In domestic hot water systems, keep the liquid temperature
below 149 °F (65 °C) to eliminate the risk of lime
precipitation.
To avoid condensation in the control box and stator, the
liquid temperature must always be higher than the ambient
temperature:
Ambient temp.
Min. liquid temp. Max. liquid temp.
[°F (°C)] [°F (°C)] [°F (°C)]
32 (0) 36 (2) 230 (110)
50 (10) 50 (10) 230 (110)
68 (20) 68 (20) 230 (110)
86 (30) 86 (30) 230 (110)
95 (35) 95 (35) 194 (90)
104 (40) 104 (40) 158 (70)
Check valve
Use of a check valve may reduce pump hydraulic
performance.
Approximate power usage
Min. [W]
Max. [W]
39 45
ALPHA
5
20
Operation