Technical Data; Sound Pressure Level; Installation; Pump Location - Grundfos CH Series Installation And Operating Instructions Manual

2.2.5 Minimum inlet pressure
The table below applies to the maximum flow rates
of the pumps and a barometric pressure of
760 mmHg.
The values stated are the minimum inlet
pressures/maximum suction lifts "H" [m head] at the
pump suction port. The values are stated at different
liquid temperatures. The head loss in the suction
pipe should therefore be taken into account.
The maximum suction lift may be limited by the
actual head.
Type
50 Hz 20 °C 40 °C
CH 2 *4.1
CH 4 *7.5 *7.0
60 Hz
CH 2 *3.1 *2.6
CH 4 *6.8 *6.3
"H" = minimum inlet pressure during operation.
"H" marked * = maximum suction lift during
operation.
1 m head ≈ 0.1 bar.

2.3 Technical data

2.3.1 Electrical data
See the pump nameplate.
2.3.2 Dimensions
See page 52.

2.4 Sound pressure level

The sound pressure level of the pump is lower than
the limiting values stated in the EC Council Directive
2006/42/EC relating to machinery.
H [m head]
55 °C 90 °C
22 *2.7 2.8
*6.1 *0.6
*1.7 3.8
*5.4 0.1

3. Installation

3.1 Pump location

The pump should be installed so that the suction
pipe is as short and the suction lift as small as
possible.
The pump should be sited in a well ventilated but
frost-free position. See section 6.1 Frost protection.
It may be sited outside, but it should be protected
from the elements by means of a suitable cover.
The pump may be installed in one of the positions
shown in fig. 1.
Pump positions
Fig. 1

3.2 Position of terminal box

The terminal box can be turned to any one of the
positions shown in fig. 2 before the pump is installed.
Terminal box positions
Fig. 2
To change the position of the terminal box:
1. Remove the four screws which, from the motor
side, are screwed into the discharge chamber.
2. Turn the stator housing to the required position.
3. Replace the screws and tighten securely.
7