Installation
25
Medium UPM
8
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.
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 Control box
positions in a condensing environment, page 25.
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.
For further specifications, see Technical data and
13. Data sheets.
TM07 2006 2518TM07 4189 5019
Before dismantling the pump, drain the
system, or close the isolating valves on
either side of the pump.
TM07 2007 2518
Liquid temperature 75 °C 95 °C 110 °C
Minimum inlet pressure
0.01 MPa 0.05 MPa 0.10 MPa
0.10 bar 0.50 bar 1.00 bar
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