Ii.10 Start-Up Procedure; General Unit Conditions - Hitecsa EWMIM Serie Manual De Instalación, Uso Y Mantenimiento

II.10 START-UP PROCEDURE

IMPORTANT!
Machine commissioning or the first start up (where
provided for) must be carried out by skilled
personnel from workshops authorised by
HITECSA, qualified to work on this type of
products.
IMPORTANT!
The use and maintenance manuals for the pumps,
fans and safety valves are attached to this manual
and should be read throughout.
DANGER!
Before starting up, make sure that the installation
and electrical connections conform with the
instructions in the wiring diagram. Also make sure
that there are no unauthorised persons in the
vicinity of the machine during the above operations.
DANGER!
The units are equipped with safety valves located
inside the technical compartment. When they cut in,
they cause a loud noise and violent refrigerant and
oil leaks. Do not approach the safety valve tripping
pressure value.
IMPORTANT!
A few hours before starting up the unit (at least 12),
supply power to the machine in order to power the
electrical resistances designed to heat up the
compressor intake pipe. Each time the unit starts
up the crankcase resistances switch off
automatically.
N.B.:
The unit is equipped with a function that prevents starting, if the
minimum heating time of the compressor crankcase heaters is not
respected; this time is evaluated by the software according to the
outdoor air temperature (see Electronic Control manual).
Once the unit installation and connection operations have been completed, the unit can be started up for the first time.
This manual provides recommendations and general information required for starting the unit. The electronic control manual also describes all the
operations required for running the unit.
For a correct first start-up of the unit carefully follow the diagrams provided in the following paragraphs.
II.10.2

GENERAL UNIT CONDITIONS

Have the technical clearance distances indicated in the manual been
respected?
Are the coils free from obstructions?
Are the fan grilles free from obstructions?
Is the unit damaged due to transport/installation?
The general conditions of the unit are compliant!
IOM_EWMIM-EWMIMH_120a262_207984_200601_ES-EN-FR-DE-IT
START
t
t
YES
t
YES
t
YES
t NO
II.10.1.1 Start-up instructions
Configuration parameters
Main set-point in COOLING/AUTOMATIC mode
Main set-point in HEATING/SELECT mode
Minimum time between switch-off of two different types of
compressors
Primary pump - pump use extension when no longer
required
Primary pump - minimum circulation time before allowing
compressors to switch on
Primary pump - Flow alarm bypass during unit operation
Primary pump - Flow alarm bypass at the start of the pump
Low pressure alarm: delay at departure
Low pressure alarm: delay in operation
Primary antifreeze alarm: differential
Primary antifreeze alarm: threshold for setpoint 1
Minimum time to switch on the same compressor
Minimum compressor switch-off time
Minimum compressor operating time
Before starting the unit, perform the following checks:
 the electrical supply must comply with the specifications on the data
plate and/or the wiring diagram and it must fall within the following
limits:
○ variation of the power supply frequency ±2 Hz;
○ variation of the power supply voltage: ±15% of the nominal voltage;
○ imbalance between the supply phases: <2%.
 The electrical supply system must be able to supply adequate
current and be suitably sized to handle the load.
 open the electric panel and make sure the terminals of the power
supply and of the contactors are tight (they may have come loose
during transport, which could lead to malfunctions).
IMPORTANT!
Electrical connections must be made in compliance
with the local installation standards in force in the
place where the unit is installed, and with the
instructions in the wiring diagram provided with the
unit.
€ €
NO
Restore the indicated technical spaces.
€ €
NO
Clean the coils.
€ €
NO
Remove the obstructions.
Danger! Do not start the unit!
€ €
YES
Restore the unit!
76
ADVANCE
Setting
Standard
7°C
45°C
40s
15s
30s
3s
15s
60s
10s
2.0°C
3.0°C
300s
45s
10s