Immergas Victrix Maior 28 TT 1 ErP, Инструкция и рекомендации

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19
1-28
B
A
C
D
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
1.26 CIRCULATION PUMP.
The boilers are supplied with a variable speed
circulator pump.
In the central heating mode, the following op-
erating modes are available and can be selected
from the “P.C.B. programming” menu.
NOTE.: the ∆ T can be controlled compatibly
with the characteristics of the central heating
system and of the boiler.
•
Proportional head (
∆
T = 0):
the circulator
speed varies according to the power emitted
by the burner, the greater the power the greater
the speed.
• ∆ T Constant ( ∆ T = 5 ÷ 25 K): the pump speed
varies to maintain the ∆ T constant between the
system flow and return according to set value
K (
∆ T = 15 Default)
.
• Fixed (5 ÷ 9): by setting parameters “A3” and
“A4” at the same value, the pump operates at
constant speed.
Total head available to the system.
H
ea
d (kP
a)
A + B = Head available with by-pass closed
B = Head available with by-pass open
C + D = Power absorbed by the pump with by-pass open (dotted area)
D = Power absorbed by the pump with by-pass closed (dotted area)
N.B.:
for the boiler to work properly, it is not
allowed to drop below the minimum value
indicated above.
In domestic hot water mode the circulator pump
always runs at maximum speed.
Pump release.
If, after a prolonged period of
inactivity, the circulation pump is blocked, turn
the motor shaft using a screwdriver. Take great
care during this operation to avoid damage to
the motor.
By-pass Regulation (part. 26 Fig. 1-29). The
boiler leaves the factory with the by-pass open.
If necessary, the by-pass can be regulated to
system requirements from minimum (by-pass
closed) to maximum (by-pass open). Adjust
using a flat head screwdriver, turn clockwise
and open the by-pass, anticlockwise it is closed.
Ci
rcu
la
to
r p
um
p a
bs
or
be
d p
ow
er (
W
)
Flow rate (l/h)
Speed
9
Speed
9
Speed
5