Grundfos Medium UPM Series Data Booklet page 25

Medium UPM
Control box positions
Control box positions in a non-condensing
environment
Fig. 36 Allowed control box positions
Control box positions in a condensing
environment
In condensing environments the cables on the control
box must point downwards.
Fig. 37 Allowed control box positions
Changing the control box position
1. Remove the screws that hold the pump head.
2. Turn the control box into the desired position.
3. Fit the screws.
4. Tighten the new screws securely.
– The nameplate position cannot be changed.
Before dismantling the pump, drain the
system, or close the isolating valves on
either side of the pump.
Fig. 38 Changing the control box position
Insulation
When insulating the pump, the control box (especially
the cooling cover) must not be covered to allow cooling
by the surrounding air.
If the pump is installed in a cabinet or fitted with
insulation shells, the inside air temperature must not
be higher than 55 °C during operation.
Diffusion-tight, cold-water insulation cannot be
supplied by Grundfos. It must not cover the pump
head. The drain holes located in the stator housing
must always be free and one must point downwards.
Mechanical specifications
Ambient temperature
The ambient temperature must not exceed 55 °C (near
the pump surface).
Relative humidity
The relative humidity inside control box must not
exceed 95 %. Condensation is acceptable if the cables
on the control box point downwards. See
environment, page 25.
positions in a condensing
Liquid temperature
• Max. 95 °C at 55 °C ambient temperature
(continuously)
• Max. 110 °C for short periods or at low load
• Min. -10 °C (see validated temperature profile)
Note: For further lifetime evaluation, the temperature
profile must be defined.
System pressure
Max. 1.0 MPa (10 bar) with cast iron or stainless steel
housings.
Minimum inlet pressure
To avoid cavitation noise and damage to the pump
bearings, the following minimum pressures are
required at the inlet port.
Liquid temperature
0.01 MPa
Minimum inlet pressure
0.10 bar
For further specifications, see
13. Data sheets.
Control box
75 °C 95 °C 110 °C
0.05 MPa 0.10 MPa
0.50 bar 1.00 bar
and
Technical data
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