REMEHA Calenta 25s, Installation And Service Manual

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Calenta 35s - 40c
H
Manometric height central heating circuit
Q
Water flow
Parameters
p"8
and
p"9
are used to modify the pump settings:
4
If there are audible flowing noises in the system, the maximum
pump speed must be lowered using parameter
p"9
(First of all,
vent the heating system).
4
If there is insufficient flow in the radiators or if they do not warm
up completely, the minimum pump speed can be increased using
parameter
p"8
.
¼ See chapter: "Modification of the installer-level parameters",
page 67.
3.3.11. Water flow rate
The boiler's modulating control system limits the maximum difference
in temperature between the heating flow and return and the maximum
speed at which the flow temperature increases. In this way, the boiler
does not require a minimum water flow rate.
¼ If using thermostatic valves, see chapter: "Hydraulic
connections", page 29.
Calenta 25s
Δp
Pressure drop
Q
Water flow (max = 1680 l/h)
Calenta 35s
Δp
Pressure drop
Q
Water flow (max = 2460 l/h)
3.4 Technical specifications
T001748-B
0 250 500 750 1000 1250
0
100
200
300
400
500
700
800
H
(
m
b
a
r)
Q (l/h)
600
20 kW
25 kW
30 kW
35 kW
835 1252 1038
1465
606
418
530
291
T001978-A
0
100
200
300
400
500
600
700
0 500
1037 437
1500 1000 2000 2500
∆
p [
mb
ar
]
Q [l/h]
623 830
∆ T = 20K
10 kW
15 kW
20 kW
25 kW
T001749-B
0
100
200
300
400
500
600
0 500
1043 1252 1465 835
1500 1000 2000 2500
∆
p [
mb
ar
]
Q [l/h]
∆ T = 20K
20 kW
25 kW
30 kW
35 kW
Calenta 25s - 28c - 35s - 40c 3. Technical description
040412 - 7600585-01 17