Grundfos TPE2 Installation And Operating Instructions Manual page 66

System application
In systems with relatively small pressure losses in the distribution pipes.
• Two-pipe heating systems with thermostatic valves and the following:
– sized for natural circulation
– small pressure losses in those parts of the system through which the
total quantity of water flows, for example boiler, heat exchanger and
distribution pipe up to the first branching or modified to a high
differential temperature between flow pipe and return pipe, for example
district heating.
• Underfloor heating systems with thermostatic valves.
• One-pipe heating systems with thermostatic valves or balancing valves.
• Primary circuit pumps in systems with small pressure losses in the
primary circuit.
In systems with a fixed system characteristic.
Examples
• one-pipe heating systems
• boiler shunts
• systems with three-way valves
• domestic hot-water circulation.
You can use FLOW
LIMIT
flow.
If an external controller is installed, the pump is able to change from one
constant curve to another, depending on the external signal.
You can also set the pump to operate according to the maximum or minimum
curve, like an uncontrolled pump:
• Use the maximum-curve mode in periods in which a maximum flow is
required.
This operating mode is for instance suitable for hot-water priority.
• Use the minimum-curve mode in periods in which a minimum flow is
required.
This operating mode is for instance suitable for manual night setback if
you do not want automatic night setback.
In systems requiring a constant flow, independently of pressure drop.
Examples
• chillers for air-conditioning
• heating surfaces
• cooling surfaces.
In systems requiring a constant tank level, independently of the flow rate.
Examples
• process water tanks
• boiler condensate tanks.
In systems with pumps connected in parallel.
The multipump function enables the control of two to four single-head pumps
connected in parallel and twin-head pumps without the use of external
controllers. The pumps in a multipump system communicate with each other
via the wireless GENIair connection or the wired GENI connection.
66
with advantage to control the maximum circulation
Select this control mode
Constant differential pressure
H
Constant temperature and
constant differential
temperature
H
Constant curve
H
Constant flow rate
H
Q
Q
set
Constant level
H
Assist menu
"Multipump setup"
Q
Q
Q
Q