Applications; Pumped Liquids; Installation - Grundfos TP Serie Instrucciones De Instalación Y Funcionamiento

4. Applications

The pumps are designed to circulate hot or cold
water in residential, institutional and industrial
applications in systems, such as:
• heating systems
• district heating plants
• central heating systems for blocks of flats
• air-conditioning systems
• cooling systems.
In addition, the pump range is used for liquid transfer
and water supply in systems such as:
• washing systems
• domestic hot water systems
• industrial systems in general.
To ensure optimum operation, the dimensioning
range of the system must fall within the performance
range of the pump.

4.1 Pumped liquids

Thin, clean, non-aggressive and non-explosive
liquids, not containing solid particles or fibres that
may attack the pump mechanically or chemically.
Examples:
• Central heating system water (the water must
meet the requirements of accepted standards on
water quality in heating systems)
• cooling liquids
• domestic hot water
• industrial liquids
• softened water.
The pumping of liquids with a density and/or
kinematic viscosity higher than that of water will have
the following effects:
• a considerable pressure drop
• a drop in hydraulic performance
• a rise in power consumption.
In such cases, the pump must be fitted with a bigger
motor. If in doubt, contact Grundfos.
The EPDM O-rings fitted as standard are primarily
suitable for water.
If the water contains mineral/synthetic oils or
chemicals or if other liquids than water are pumped,
the O-rings must be chosen accordingly.

5. Installation

Warning
When pumping hot or cold liquids, make
sure that persons cannot accidentally
come into contact with hot or cold
surfaces.
The pump must be sited in a dry, well ventilated, but
frost-free position.
When installing pumps with oval bolt holes in the
pump flange (PN 6/10), use washers as shown in fig.
5.
Washer
Fig. 5 Use of washers for oval bolt holes
Arrows on the pump housing show the direction of
flow of liquid through the pump.
Pumps with motors smaller than 11 kW can be
installed in horizontal or vertical pipework.
Pumps with motors of 11 kW and up may only be
installed in horizontal pipework with the motor in
vertical position.
However, some TP, TPE pumps of 11 kW and up
may be suspended directly in the pipes (horizontally
or vertically). See the table
kW and up suspended in the pipes
In installations where the pump is suspended directly
in the pipes, the pump can support the pipe length L
on both sides of the pump (L less than 3 x DN). See
fig. 6. In installations where the pump is suspended
directly in the pipes, the pump must be lifted and
held in correct position by means of ropes or similar
until both pump flanges are completely fastened to
the pipe flanges.
Vertical pipe
L
Fig. 6 Pump suspended directly in the pipes
Installation
Pump
TP, TPE pumps from 11
on page 354.
Horizontal pipe
L
7