Start-Up Instructions - emmeti EC Serie Manual De Instalacion Y Uso

II.8

START-UP INSTRUCTIONS

IMPORTANT!
Machine commissioning or the first start up (where
provided for) must be carried out by skilled
personnel from workshops authorised by EMMETI
S.p.A., qualified to work on this type of products.
IMPORTANT!
The use and maintenance manuals for the pumps,
fans and safety valves are enclosed with 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
positioned 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 cut-in pressure.
II.8.1 CONFIGURATION
Safety component calibration settings EC-EH 0510÷1110
Pressure switch
high pressure
low pressure
water differential
Safety component calibration settings EC-EH 1510÷3010
Pressure switch
high pressure
low pressure
water differential
DANGER!
The safety valve is calibrated to 41.7 bar. It could
cut in if the calibration valve is reached during the
refrigerant charging operations, causing a burst
that could cause scalding.
Configuration parameters
Summer working temperature set point
Winter working temperature set point (EH)
Working temperature differential
Antifreeze temperature set point
Antifreeze temperature differential
Water differential pressure switch time upon start-up
Water differential pressure switch exclusion time upon start-up
Circulation pump switch off time delay
Minimum time between two consecutive compressor start-ups
The units are tested in the factory, where they are also calibrated and
the default parameter settings are put in. These guarantee that the
appliances run correctly in rated working conditions. The machine
configuration is carried out in the factory and should never be altered.
IMPORTANT!
If a unit is used for the production of chilled water,
check the adjustment of the thermostatic valve.
Cut-in Reset
40,7 Bar 33 Bar - Automatic
2 Bar 3,3 Bar – Automatic
50 mbar 80 mbar - Automatic
Cut-in Reset
40,2 Bar 28,1 Bar - Manual
2 Bar 3,3 Bar – Automatic
80 mbar 105 mbar - Automatic
Standard setting
II.8.2 UNIT START-UP AND STARTUP AFTER
PROLONGED SHUTDOWN
DANGER!
Always use the switch to isolate the unit from the
mains before carrying out any maintenance work,
even if it is for inspection purposes only. Make sure
that no one accidentally supplies power to the
machine, lock the mains switch in the OFF position.
Before starting the unit, perform the following checks:
○ The electricity power 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: ±10% of the nominal voltage;
• imbalance between the supply phases: <2%.
○ the electrical power 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);
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.
7°C
45°C
2°C
2,5°C
2°C
120"
15"
15"
360"
39
SECTION II: INSTALLATION AND MAINTENANCE