EVCO S.p.A. | EV3H94 | Instruction sheet ver. 1.0 | Code 1043H94E104 | Page 2 of 5 | PT 05/21
4.2
Unlocking the keypad
Touch a key for 1 s: the display will show the label “UnL”.
4.3
Setting the setpoint Economy
Check that the keypad is not locked.
1.
Touch the SET key: the display will show the label “SP1”.
2.
Touch the SET key.
3.
Touch the UP or DOWN keys within 15s to set the value within
the limits r3 and r4 (default "40... 55”).
4.
Touch the SET key (or take no action for 15s).
5.
Touch the ON/STAND-BY key.
4.4
Setting the Comfort setpoint
Check that the keypad is not locked.
1.
Touch the SET key: the display will show the label “SP1”.
2.
Touch the UP or DOWN key to select the label “SP2”.
3.
Touch the SET key.
4.
Touch the UP or DOWN keys within 15s to set the value within
the limits r1 and r2 (default "40... 70”).
5.
Touch the SET key (or take no action for 15s).
6.
Touch the ON/STAND-BY key.
4.5
Setting the overboost activation threshold
Check that the keypad is not locked.
1.
Touch the SET key: the display will show the label “SP1”.
2.
Touch the UP or DOWN key to select the label “SP3”.
3.
Touch the SET key.
4.
Touch the UP or DOWN keys within 15s to set the value within
the limits 10 and r2 (default “10... 70”).
5.
Touch the SET key (or take no action for 15s).
6.
Touch the ON/STAND-BY key.
4.6
Activating manual defrost
Check that the keypad isn’t locked and that the anti-legionella and overboost functions aren’t
active.
1.
Touch the UP key for 4s.
If P4 = 1 or 2 (default), defrost is activated provided that the evaporator temperature is lower
than the d2 threshold.
4.7
Silencing the alarm buzzer (if u9 = 1)
Touch a key.
5
FUNCTIONS AND LOAD OPERATIONS
5.1
Economy
-
compressor on if DHW tank lower temperature < “SP1 setpoint - r0 differential” and off
if DHW tank lower temperature > “SP1 setpoint”
-
fans on if compressor on
-
heaters switched off in normal operation (on if needed during defrost)
5.2
Comfort
-
compressor on if DHW tank lower temperature < “SP5 setpoint - r0 differential” and off
if DHW tank lower temperature > “SP5 setpoint”
-
fans on if compressor on
-
heaters on, with a single probe configured (P3 = 0), if DHW tank upper temperature <
“SP2 - r6 threshold - r7 differential” and off if DHW tank upper temperature > “SP2 -
r6 threshold”.
-
heaters on, with two probes configured (P3 = 1), if DHW tank upper temperature <
“SP2 – r0 differential” and off if DHW tank upper temperature > “SP2”.
5.3
Anti-legionella
It activates at “H0 intervals” or at “Ant time”, provided that DHW tank lower temperature >
“SP1 setpoint” and > “SP2 setpoint”
-
compressor switched off
-
fans switched off
-
heaters switched on until DHW tank upper temperature > “H1 threshold” and then for
“H3 time”.
5.4
Overboost
It activates in manual mode, provided that DHW tank upper and lower temperature < “SP3
threshold”
-
compressor, fans and heaters on until DHW tank upper temperature > “SP1 setpoint”.
5.5
Defrosting
It activates with evaporator temperature < “d17 threshold” for “d18 time” or in manual mode,
provided that the anti-legionella and overboost functions are not active
-
compressor switched on if d1 = 1
-
defrost relay active if d1 = 1 or 2
-
fans switched on if d1 = 2
-
heaters switched on to prevent too high temperature drop in the storage tank
5.6
Photovoltaic system
It activates with photovoltaic input active
-
operation as in comfort mode, except for “SP2 setpoint” which becomes “SP6 setpoint”.
5.7
Green
It activates with multi-purpose input active and DHW tank upper and lower temperature > “SP8
setpoint”
-
compressor switched off
-
fans switched off
-
heaters switched off.
5.8
Antifreeze
This function is used to prevent the water freezing. It is activated when tank upper tempera-
ture < “SP7 setpoint” – “r0 differential” and this function is deactivated when tank upper tem-
perature > “SP7 setpoint”
- heaters are switched on.
This function can be active only if the controller is in stand-by.
5.9
Pre opening hot gas defrost valve
This function is used to balance the pressure at the compressor start-up, and it is activated on-
ly if “d1” = 3.
This function switch on the defrost output “i11” seconds before the start-up of the compressor,
this occurs every time the compressor started, even if there is no defrost request.
5.10
Fan operation
The fan operates depending on the active function, normally C12 second before the switch on
of the compressor. There are some exceptions:
-
defrost: in case of hot gas (d1=1) compressor is active but fan is off. In case of com-
pressor stop (d1=2) compressor is off but fan is active
-
alarms: in case of LHP compressor is off but fan is active.
6
ADDITIONAL FUNCTIONS
6.1
Activating/deactivating comfort operation in manual mode
Check that the keypad is not locked.
1.
Touch the DOWN key for 1 s: the display will show a code.
2.
Touch the UP or DOWN key within 15s to select a label.
COD. DESCRIPTION
Auto activates comfort operation
ECO
deactivates comfort operation
3.
Touch the SET key.
4.
Touch the ON/STAND-BY key (or take no action for 60s) to exit
the procedure.
6.1
Activating the overboost function
Check that the keypad isn’t locked.
1.
Touch the DOWN key for 1 s: the display will show a code.
2.
Touch the UP or DOWN key within 15s to select “ObS”.
3.
Touch the SET key.
4.
Touch the ON/STAND-BY key (or take no action for 60s) to exit
the procedure.
6.2
Displaying the operating mode
Check that the keypad is not locked.
1.
Touch the DOWN key: the display will show a code.
COD. DESCRIPTION
ECO
economy
ObS
overboost
Auto comfort
Anti
anti-legionella; if flashing, DHW tank lower temperature > “SP1 setpoint” and
> “SP2 setpoint”
dEFr
defrost
in2
photovoltaic function
2.
Touch the ON/STAND-BY key (or take no action for 60s) to exit
the procedure.
6.3
Displaying/deleting compressor functioning hours
Check that the keypad is not locked.
1.
Touch the DOWN key for 1 s: the display will show a code.
2.
Touch the UP or DOWN key within 15s to select a label.
COD. DESCRIPTION
CH
display compressor working hours in hundreds
rCH
delete compressor working hours
3.
Touch the SET key.
4.
Touch the UP or DOWN key to set “149” (to select rCH).
5.
Touch the SET key.
6.
Touch the ON/STAND-BY key (or take no action for 60s) to exit
the procedure.
