33
Para- Description Adjustment
meters range
4 Min. global flow temperature adjustment, for outer thempetrature of 20°
when using the heating curve (see fig. 19) 15 to 60°C
5 Min. outer temperature used in the calculation of the C,H. system, when
using the heating curve (see fig. 19) -20 to 10°C
6 Heating stop temperature when the value calculated by the outer NTC
sensor is lower than the pre-set temperature Da 1 K > t° di regolazione
del parametro 4 fino a 60°
7 This parameter for night shift of flow temperature (see fig. 19)
is use only when programmer is fitted.
When the1
st
digit of the parameter A (see below) is 1 the reduction is active. 0 to 40 K
8 1
st
digit: adjustment of the outer temperature read by the outer sensor –5 to 5 K
2
nd
digit: C.H. hysteresis, i. e. the temperature difference against the
set temperature to which the boiler should restart. By the way it is convenient
to consider that the switching off temperature is always 5K above the set point 0 to 9 K
9 Post-circulation time of boiler pump in C.H. mode 3 to 99 min
A Two digit parameter:
is used to make the configuration of Heating system and DHW production
If heating system is controlled by:
- ON/OFF room thermostat or programmer 1
st
digit = 0x (*)
- outer sensor (based on parameter 6 - see paragraph 3.3.2); if the
programmer is fitted the night shift of flow temperature is active 1
st
digit = 1x (*)
- outer compensator with 0 - 10 V outlet, where 0 V corresponds to the
minimum flow temperature and 10 V to the maximum temperature 1
st
digit = 2x (*)
If D.H.W. production is controlled by:
- Storage tank loading pump, (downstream the mixing bottle) or
3 way valve normally open towards C.H. system (upstream the mixing bottle) 2
nd
digit = x0
- Storage tank loading pump (upstream the mixing bottle) 2
nd
digit = x1 (solution not used)
- Reversed 3 way valve (normally open towards DHW tank) 2
nd
digit = x2
B Differential temperature rise which increases the boiler flow temperature
during the DHW request (increase of parameter 1) in order to fulfil the
request regardless the heating set temperature (parameter 3) 5 to 25 K
C Maximum fan speed in C.H. mode operation (x 100)
(factory set 58)
10 to 60 rpm
D Maximum fan speed in DHW mode operation (x 100)
(factory set 58)
10 to 60 rpm
E Minimum fan speed (x 100)
(factory set 22)
10 to 60 rpm
F Starting speed, in percentage of the maximum speed, shown on the 10 to 100%
parameter C (increasable when flue discharge is difficult)
(factory set 75) Do not regulate under 50%
G Flow temperature adjustment to 0 V when using an outer compensator 0 to 50 °C
H Flow temperature adjustment to 10 V when using an outer compensator 50 to 90 °C
J Combined Parameter : (two digits)
Alarm:- the alarm switch is closed when the 1 to 7 modules are in
lockout position (see note 1). 1
st
digit = 1x to 7x (see note 1)
Pump post-circulation time or 3-way valve commutation delay
after D.H.W. has reached the set point temperature
- adjustable by 30 sec steps up to (9 x 30 sec = ) 270 sec 2
nd
digit = x0 to x9 (x 30 sec.)
L Hysteresis (difference between the switching ON and switching OFF boiler
temperatures during the DHW production) (see Note 2) 5 to 14 K
N Type of burner control and number of thermal elements
1
st
digit of the parameter 3x = Unical standard regulation
2
nd
digit of the parameter x1-x7 = No. of boiler burners
(*) Should the outer sensor (terminals 3-4) and the ON-OFF room thermostat or a timer (terminals 5-6) be connected, on opening the thermostat or the
timer (terminals 5-6) with parameter A in 0x, the boiler will be switched off; on the contrary with parameter A in 1x the boiler will switch to night shift
mode. If a link connects the terminal 5 to the terminal 6, the boiler will not switch to night shift mode.
NOTE 1: By entering a figure from 1 to 7 it is possible to determine the number of faulty burner from which a lockout warning signal (alarm) is desired.
NOTE 2: Should the DHW recirculation be used, the parameter L reduces the number of ignitions if the hysteresis value is high.
3.2.8.2 - OPERATION PARAMETERS PROGRAMMABLE ONLY BY INSTALLER AFTER ENTERING THE SERVICE CODE
(Available at UNICAL Service)
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