Technical Data; Operating Conditions; Minimum Flow Rate; Sound Pressure Level - Grundfos MTH Serie Instrucciones De Instalación Y Funcionamiento

Fault
5. The pump runs
but gives no liquid
or the pump
capacity is not
constant.

7. Technical data

7.1 Operating conditions

Pump type
Minimum liquid temperature [°C]
Maximum liquid temperature [°C]
Maximum ambient temperature [°C]
Maximum operating pressure [bar]
Enclosure class

7.1.1 Minimum flow rate

Minimum flow rate [l/min]
Pump type At a liquid
temperature
MTH 2 and 4
MTH 8
MTH 10 and 15
7.1.2 Maximum number of starts
Maximum number of starts per hour: 100.

7.2 Sound pressure level

The sound pressure level of the pumps is lower than
70 dB(A).
Cause
a) The pump strainer is partly blocked by
impurities.
b) The liquid level in the tank is too low.
c) The pump rotates in the wrong
direction.
MTH
-10
+90
+40
10
IP54
At a liquid
temperature
between 80
of 80 °C
and 90 °C
3 8
13 33
20 50
Remedy
Clean the strainer.
Increase the liquid level.
Change the direction of rotation of the
motor.

8. Disposing of the product

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
The crossed-out wheelie bin symbol on
a product means that it must be
disposed of separately from household
waste. When a product marked with this
symbol reaches its end of life, take it to a
collection point designated by the local
waste disposal authorities. The separate collection
and recycling of such products will help protect the
environment and human health.
See also end-of-life information at
www.grundfos.com/product-recycling.
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