Evco EV3H94 Instruction Sheet

EVCO S.p.A. | EV3H94 | Instruction sheet ver. 1.0 | Code 1043H94E104 | Page 1 of 5 | PT 05/21
EV3H94
EN ENGLISH
- power supply 115... 230 VAC
- DHW tank upper and lower probe, evaporator probe (PTC/NTC/Pt 1000)
- photovoltaic, HP and multi-purpose digital input (see i0)
- compressor relay 16 A res. @ 250 VAC
- alarm buzzer
- TTL MODBUS slave port for EVconnect app, EPoCA remote monitoring system or for
BMS.
1

MEASUREMENTS AND INSTALLATION

Measurements in mm (inches). To be fitted to a panel, snap-in brackets provided.
INSTALLATION PRECAUTIONS
- the thickness of the panel must be between 0.8 and 2.0 mm (1/32 and 1/16 in);
- ensure that the working conditions are within the limits stated in the TECHNICAL
SPECIFICATIONS section;
- do not install the device close to heat sources, equipment with a strong magnetic field,
in places subject to direct sunlight, rain, damp, excessive dust, mechanical vibrations
or shocks;
- in compliance with safety regulations, the device must be installed properly to ensure
adequate protection from contact with electrical parts. All protective parts must be
fixed in such a way as to need the aid of a tool to remove them.
2

ELECTRICAL CONNECTION

N.B.
- use cables of an adequate section for the current running through them.
- to reduce any electromagnetic interference locate the power cables as far away as
possible from the signal cables.
Controller for DHW heat pump heaters
PRECAUTIONS FOR ELECTRICAL CONNECTION
- if using an electrical or pneumatic screwdriver, adjust the tightening torque;
- if the device is moved from a cold to a warm place, humidity may cause condensation
to form inside. Wait for about an hour before switching on the power;
- make sure that the supply voltage, electrical frequency and power are within the set
limits. See the section TECHNICAL SPECIFICATIONS;
- disconnect the power supply before carrying out any type of maintenance;
- do not use the device as a safety device;
- for repairs and for further information, contact the EVCO sales network.
3

FIRST-TIME USE

1. Carry out the installation following the instructions given in the section MEASUREMENTS
AND INSTALLATION.
2. Power up the device as set out in the section ELECTRICAL CONNECTION: an internal
test will start up.
The test normally takes a few seconds; when it is finished the display will switch off.
3. Configure the device as shown in the section Setting configuration parameters.
Recommended configuration parameters for first-time use:
PAR. DEF. PARAMETER
SP1 55.0 setpoint in economy mode
SP2 65.0 setpoint in comfort mode
P0 1 type of probe
P2 0 temperature measurement unit
P3 1 enabled probes
d1 2 type of defrost
Then check that the remaining settings are appropriate; see the section CONFIGURA-
TION PARAMETERS.
4. Disconnect the device from the mains.
5. Make the electrical connection as shown in the section ELECTRICAL CONNECTION with-
out powering up the device.
6. For the connection in an RS-485 network connect the interface EVIF22TSX or
EVIF23TSX, to activate real time functions connect the module EVIF23TSX, to use the
device with the EPoCA remote monitoring system, connect the EVIF25TWX module, to
use the device with the APP EVconnect connect the interface EVIF25TBX; see the rele-
vant instruction sheets. If EVIF22TSX or EVIF23TSX is used, set parameter bLE
to 0.
7. Power up the device.
4

USER INTERFACE AND MAIN FUNCTIONS

4.1

Switching the device on/off

1. Touch the ON/STAND-BY key for 4 s.
If the device is switched on, the display will show the P5 value ("DHW tank upper temperature"
default); if the display shows an alarm code, see the section ALARMS.
LED ON OFF
compressor switched compressor
on off
defrost active -
fans switched on fans switched off
alarm active -
HACCP
compressor mainte- -
nance request
temperature display -
°C/°F
heaters switched on heaters switched off
AUX
device switched off device switched on
When 30s have elapsed without the keys being pressed, the display will show the "Loc" label
and the keypad will lock automatically.
MIN... MAX.
r3... r4
r1... r2
0 = PTC 1 = NTC
2 = Pt 1000
0 = °C 1 = °F
0 = DHW tank upper probe + high
pressure input
1 = DHW tank upper and
probe
0 = electric 1 = hot gas
2 = compressor stopped
3 = hot gas balancing the pressure
electric
FLASHING
switched - compressor protection active
- setpoint being set
-
-
-
operation with EVconnect APP ac-
tive
-
-
-
lower