Ariston Type C Installation And Servicing Instructions

32
Test Function
tt
The P.C.B. allows the boiler to be forced to the maximum or
minimum power. Enable the test function and
OO will appear on
the r
ight-hand displa
y (see Fig.
3.8).
To select operation at maximum power, press the programming
k
e
y , tw
o dashes will appear at the top of the r
ight-hand
displa
y (see Fig.
3.9).
This function is disab
led when y
ou press reset key to quit the
adjustments menu.
T
o select oper
ation at minim
um po
wer, press the programming
k
e
y , two dashes will appear at the bottom of the right-hand
display (see Fig. 3.10). This function is disabled when you press
reset key
“H” to quit the adjustments menu.
Note: The boiler can be forced to the maximum and minimum
power even without enabling the test function via the
adjustments men
u:
a - b
y pressing the Reset k
ey for 5 seconds, the boiler is
automatically forced to test mode and t-- will be displayed,
the boiler is now in the test mode for the maximum heating
po
wer, to force the boiler to maximum output for hot water it
is necessary to press the and keys together, two
dashes appear at the top of the right-hand display (see Fig.
3.9). This function is disabled by pressing the reset key .
b - by pressing the key, the boiler is forced to operate at
minim
um po
w
er
, tw
o dashes appear at the bottom of the
r
ight-hand displa
y (Fig.
3.10).
This function is disab
led b
y
pressing the reset k
e
y
.
max power DHW
max power Central Heating
minimum power
FIG.
3.27
FIG. 3.28
FIG. 3.29
With parameter P 5 it is posslbe to adjust the heat curve
setting to those shown in fig. 4.16). Using programming keys
and , the curve setting may be changed. The possibility of
setting curves varies according to parameter r:
r = 00 (low temperature range) from curve 0_3 to 0_5
(underfloor
systems only)
r = 01 (high temperature range) from curve 1_0 to 3_0.
WARNING
(*) - If curve 0_3 or 0_5 is set, a system
safety thermostat must be connected to
the main terminal board (see paragraph
2.10)
SETTING THE CURVE INCLINE
PP 55
(Only enabled when an outdoor sensor is installed)
When using an outdoor sensor, the microprocessor-controlled P.C.B.
calculates the most suitable flow temperature, taking into account
the e
xternal temperature and the type of system. The
microprocessor is capable of doing this because it is possible to
establish a link between the external temperature and the flow
temperature of the Central Heating system water. This link translates
into a "thermal curve".
The type of curve should be chosen in correspondence with the
planned temperature of the system and the nature of the heat loss
present in the building.
100
80
3
2,5
2
1,5
1,2
1
0,5
0,3
60
40
20
20 16
temp. esterna [°C]
temp. di mandata della caldaia [°C]
12 8 4 0 -4 --8 --12 --16
Fig.
3.24
FIG.
3.23
FIG. 3.22
Flow temperature (°C)
External temperature (°C)

Ariston Type C Specifications

General

Brand	Ariston
Model	Type C
Category	Boiler
Language	English