RHOSS Mini-Y Serie Gebrauchsanweisung Seite 51

IMPORTANT !
When modifying or var ying the machine's operating
paramet ers, make sure that you do not create
situations that conflict with the other set
paramet ers.
For example, if the Summer Set-poi nt parameter is set at 0°C, the
parameter (can only be modified b y authorised per sonnel via after-
sales p assword) relati ve to the anti-freez e set must also be modified.
The anti-freez e Set-point mus t be set in order to prevent the mac hine
stand-still caused by the anti-freez e s afety.
Whenever the anti-freez e set point is set with a value belo w 3°C it
is essential to use water m ixed with a suitable per centag e of
ethylene glycol.
I.3.2 Double Set-point
The double Set-point function allows to use two different Set-points on
the basis of a digital input. If the function is enabled and the digital input
is open, the main Set-point is used. If the digital input is clos ed, the set
point used is that set in the following mas k.
The regulati on li mits are the same as the main Set-point. For further
information, refer to the wiring diagram attached to the mac hine.
The double Set-point access or y must be enabled from the User menu.
If it is enabled, pressi ng the DOW N key will pass to the following mas k:
!
ALARM
Summer double
setpoint
Prg
Winter double
setpoint
ON
OFF
To set the Set-poi nts, proceed as indicated for the indi vidual Set-poi nt.
I.3.3 Scrolling Set-point (CS)
The scrolling Set-point, via 4÷20 mA analogue signal (CS acc essor y)
can assume two functi oning logics (factory set accordi ng to request):
"Shifting Set-point" logic;
"Offset Set-point" logic.
In the Shifting Set-point l ogic, the analogue signal (opportunely
configured) s ets the Set- point at which the machine must operate
directly (the Set-point set on the c ontrol panel is bloc ked).
In the Offset Set-poi nt logic, the analogue signal (opportunel y
configured) c orrects the Set-point set on the control panel.
The CS access ory must be enabled from the User menu. If enabled,
using the UP-DOW N keys it is possible to scroll the following mas ks:
Shifting set-point by
analogue input COOL
4 m A : 04.0°C
20 m A : 16.0°C
Shifting set-point by
analogue input HEAT
4 m A : 30.0°C
20 m A : 50.0°C
NOTE: Thes e mas ks are displayed onl y if the CS functi on i n enabled i n
Shifting mode.
10.0 C
MODE
35.0 C
Scrolling summer Set-point fi eld of
variation s etti ng
Minimum Set-point
Maxi mum Set-poi nt
Scrolling winter Set- point field of
variation s etti ng
Minimum Set-point
Maxi mum Set-poi nt
Offset set-point b y
analogue input COOL
4 m A : -03.0°C
20 m A : 03.0°C
Offset set-point b y
analogue input HEAT
4 m A : -03.0°C
20 m A : 03.0°C
NOTE: Thes e mas ks are displayed onl y if the CS functi on i n enabled i n
Offset mode.
Summer CS chart in Shifting logic
16
14
12
10
8
6
4
4 6
Example:
With a minimum Set-point of 4°C and a maximum Set- point of 16°, with
an external analogue signal equal to 12 mA, a wor king Set-poi nt of
10°C is s et.
W inter CS chart in Shifting logic
53
50
46
42
38
34
30
4 6
Example:
With a minimum Set-point of 30°C and a maxi mum Set-point of 53°C,
with an external analogue signal equal to 15 mA, a worki ng Set-point of
46°C is s et.
T Operati ve Set-poi nt
S External analogue signal (4÷20 mA)
Summer CS chart in Offset logic
3
2
1
0
-1
-2
-3
4 6
Example:
With a minimum Offs et of -3°C and a maximum Offs et of 3°C, with an
external analogue signal equal to 8 mA, the Set-point s et is decreased
by 1.5°C.
51
CONTROL PANELL PGD
Summer Set- point field of variation
setting
Minimum offset
Maxi mum offset
Winter Set-point field of c orrection
setting
Minimum offset
Maxi mum offset
8 10 12 14 16 18 20
8 10 12 14 16 18 20
8 10 12 14 16 18 20
S (mA)
S (mA)
S (mA)