i-HWAK V4
Chillers and inverter air / water heat pumps with axial fans
18
12V-
Remote keyboard power supply (12V, 50Hz, 500mA)
SE/SE
Programmable analog input with sensor NTC-10kΏ at 25°C β 3435.
Or voltage-free digital input
Analog or digital input
AEHN
Terminal for neutral line of (230Vac)
Under-voltage output single phase 230Vac,
50Hz, 5A resistive, 1A inductive.
AEH
Terminal of phase line of (230Vac).
SAN/SAN
Programmable analog input with sensor NTC-10kΏ at 25°C β 3435.
Or voltage-free digital input
Analog or digital input
DO4N
Terminal for neutral line of single phase power supply (230Vac).
Under-voltage output single phase 230Vac,
50Hz, 5A resistive, 1A inductive.
Can be used in the versions without KA
DO4
Terminal for phase line of (230Vac).
DO5N
Terminal for neutral line of (230Vac).
Under-voltage output single phase 230Vac,
50Hz, 5A resistive, 1A inductive.
Can be used in the versions without KA
DO5
Terminal for phase line of (230Vac).
SW/SW
Input for summer/winter mode commutation from remote control panel (to
activate this function, please see corresponding paragraph in the control
manual MCO)
Voltage-free digital input
onoff /onoff
on/off remote input
(closed = unit is ON / open =uniti s OFF)
Voltage-free digital input
0-10V+
Signal input: 0-10V (+) for set point adjustment
Analog input
(ST10)
0-10V-
Signal input: 0-10V (-) for set point adjustment
7.8.2
Terminal block and the electric box
The following illustration shows the the removal procedure of the coping plate for the models 14/16, but the same procedure is
applicable for the other models
1.
Remove the screws connecting the top plate. Two for each side of the unit and other two
crews connecting the top plate with the hole-cable plate holder. (For the small sizes, there is
only one fixing screw in the controller’s lateral part of the unit)
2.
Remove the screws connecting the cover plate of the electric box then proceed to connect
wire to the terminal block.
3.
Insert the cables PG cable glands located on the side of the unit to take them outside the unit
4.
Close the electric box and the top panel of the unit with their fixing screws.
The above operations must be done after turning off the unit and disconnecting
it from the power supply (by mean of an appropriate disconnecting switch
which should be already mouted by the installer).
Operations to be performed by qualified personnel.
Remove the top cover without taking away the holder of hole-cabe plate.
The work is completed, please fix all the removed plates then tighten all screws
and washers (if expected).
8
START UP
Before start-up:
Check out the availability of the supplied wiring diagrams and manuals of installed apparatus.
Check out the availability of the electrical and hydraulic diagrams of the plant in which the unit is installed.
Check that the shut-off valves of the hydraulic circuits are open.
Verify that the hydraulic circuit has been charged under pressure and air vented.
Check out that all water connections are properly installed and all indications on unit labels are observed.
Ensure that arrangements have been provided to drain the condensate.
Check out that all power cables are properly connected and all terminals are hardly fixed.
Check that electrical connections are carried out according to the norms in force including grounding.
Check out that the voltage is the one indicated in the unit labels.
Make sure the voltage is within the limits (±10%) of tolerance range.
Check out that crankcase heaters are powered correctly.
Check out that there is no refrigerant leakage.
Check out that all the cover panels are installed in the proper position and locked with fastening screws before start up.
