Sime 8103296, User, Installation And Servicing Instructions

Page: 68 / 100

68
EN
5.12 Setting the circulation pump
5.12.1 Selecting the operating mode and the charac-
teristic curve
The adjustment mode and the corresponding characteristic
curves are selected in the following way:
– press, once or several times, for roughly 1s the command
button (4) to select the adjustment mode and the correspond-
ing characteristic curve (LEDs 2 and 3 will signal the relevant
operations).
m
CAUTION
The table shown below summarises the relationship
between the number of presses of the (4) button, the
signals emitted by LEDs (2) and (3) and the corre-
sponding characteristic curve.
No. of times
the command
button (4) is
pressed
LEDs Settings mode
Characteristic
curve
1 Constant speed II
2 Constant speed I
3
Variable differ-
ential pressure
Δp-v
III
4
Variable differ-
ential pressure
Δp-v
II
5
Variable differ-
ential pressure
Δp-v
I
6
Constant differ-
ential pressure
Δp-c
III
7
Constant differ-
ential pressure
Δp-c
II
8
Constant differ-
ential pressure
Δp-c
I
9 Constant speed III
m
CAUTION
Press the command button (4) 9 times to restore the
original settings (constant speed/ characteristic curve
III).
5.12.2 Choosing the adjustments
Chose the adjustment mode on the basis of the most suitable
characteristics indicated below.
Constant speed (I, II, III)
I
III
II
Q/m
3
/h
H/m
Recommended for systems with stable
resistance that require a constant flow
rate.
The heat pump functions in three stag-
es, corresponding to the number of pre-
set fixed revolutions (I, II, III).
Variable differential pressure Δp-v (I, II, III)
II
III
I
Q/m
3
/h
H/m
Recommended in case of heating sys-
tems with double delivery and radiators,
for the reduction of flow noises on the
thermostatic valves. The pump halves
the head in case of a reduction of the
flow rate in the piping network. Elec-
tricity can be saved since the head is ad-
justed on the basis of the required flow
rate and the lower flow speeds.
Three pre-defined characteristic curves
(I, II, III) from which to choose.
Constant differential pressure Δp-c (I, II, III)
III
I
II
Q/m
3
/h
H/m
Recommended with radiant panels or
large-size pipes and for all applications
that lack variable characteristic curves
for the system (such as, for example,
calorifier charge pumps) and single-de-
livery heating systems with radiators.
The adjustment preserves the set head
regardless of the conveyed flow rate.
Three pre-defined characteristic curves
(I, II, III) from which to choose.
5.13 Additional functions of the pump’s com-
mand button
1 2
3 4
Fig. 24
5.13.1 Bleeding the pump
The pump bleed function can be activated by pressing the com-
mand button (4) for at least 3 seconds; the pump will bleed au-
tomatically.
This function is used to bleed the pump ONLY and not the heat-
ing system.
5.13.2 Manual restart
The manual restart can be activated by pressing for at least 5
seconds the command button (4), which unlocks the pump after
extended periods of inactivity (e.g. after a summer shutdown) or
following a pump lock-out.