Grundfos UPE 80-120 - Page 9

9
6.2.1 Setting in connection with pump
replacement
If an uncontrolled pump is to be replaced with a UPE
Series 2000, settings can be made according to the
tables below.
In systems
with ...
for instance ...
select this con-
trol mode ...
relatively great
head losses in
the boiler circuit
and the distribu-
tion pipes
1. Two-pipe
heating sys-
tems with
thermostatic
valves and
with:
• a dimensioned pump head higher than 4 metres,
Proportional
pressure
• very long distribution pipes,
• strongly throttled pipe balancing valves,
• differential pressure regulators,
• great head losses in those parts of the system
through with the total quantity of water flows (e.g.
boiler, heat exchanger and distribution pipe up to
the first branching) or
• low differential temperature.
2. Underfloor heating systems and one-pipe heating systems with ther-
mostatic valves and great head losses in the boiler circuit.
3. Primary circuit pumps in systems with great head losses in the pri-
mary circuit.
relatively small
head losses in
the boiler circuit
and the distribu-
tion pipes
1. Two-pipe
heating sys-
tems with
thermostatic
valves and:
• with a dimensioned pump head lower than 2 me-
tres,
Constant
pressure
• dimensioned for natural circulation,
• with small head losses in those parts of the system
through with the total quantity of water flows (e.g.
boiler, heat exchanger and distribution pipe up to
the first branching) or
• modified to a high differential temperature (e.g. dis-
trict heating).
2. Underfloor heating systems with thermostatic valves.
3. One-pipe heating systems with thermostatic valves or pipe balancing
valves.
4. Primary circuit pumps in systems with small head losses in the pri-
mary circuit.
Existing pump at maximum speed Existing pump at reduced speed
Existing
pump
UPE Series 2000
Existing
pump
UPE Series 2000
Maximum
head
[m]
Setting of
head [m]
Setting of
control mode
Maximum
head
[m]
Setting of
head [m]
Setting of
control mode
3 2 Constant pressure 3 1.5 Constant pressure
4 2 Constant pressure 4 1.5 Constant pressure
5 2.5 Proportional pressure 5 2 Constant pressure
6 3 Proportional pressure 6 2 Constant pressure
7 3.5 Proportional pressure 7 2.5 Proportional pressure
8 4 Proportional pressure 8 3 Proportional pressure
9 4.5 Proportional pressure 9 3.5 Proportional pressure
10 5 Proportional pressure 10 3.5 Proportional pressure
11 5.5 Proportional pressure 11 4 Proportional pressure
12 6 Proportional pressure 12 4 Proportional pressure