SYSTEMP – Installation Operation Manual (IOM SYSTEMP rev.N)

Table Of Contents
105
15.1.6 CHECKS OF THE VACUUM OF THE AIR CONDENSED DIRECT EXPANSION CIRCUIT
Description Positive Negative
1 Make sure the cooling circuit valves are open.
2 Check opening of the solenoid valve (if present on circuit).
3 Check the seal of the cooling circuit.
4 Check the high and low side pressure gauges connection in VACUUM position.
5 Check the vacuum level of the cooling circuit.
15.1.7 REFRIGERANT CHARGE OF THE AIR CONDENSED DIRECT EXPANSION CIRCUIT
Description Positive Negative
1 Check the high and low side pressure gauges connection in CHARGING position.
2 Check the correspondence of refrigerant with that used by the unit (R410a)
3
Check HIGH PRESSURE side introduction of an amount of refrigerant equal to 2/3 of the
total calculated content.
4
Check nal refrigerant charge by lling in through the suitable tting downstream of the
expansion valve.
15.1.8 ELECTRICAL POWER SUPPLY CHECK
Description Positive Negative
1 Check the connection of the three phases, neutral and earth.
2
Verify that the characteristics of the electrical supply line fall within the operating limits and
comply with that indicated in the wiring diagram.
3
Verify that the electrical connections with the condenser isolator fall within the operating
limits and comply with that indicated in the wiring diagram.