24
21.05 - 6068956_00
NXP 0500 - 1650 2-PIPE SYSTEM / 4-PIPE SYSTEM
EN
ROUTINE MAINTENANCE
All cleaning is prohibited until the unit has been discon-
nected from the electric power supply mains
1
.
Make sure there is no voltage present before operating.
Periodic maintenance is fundamental to keep the unit
perfectly efficient under an operational and energy
point of view.
It is therefore essential to carry out periodic yearly con-
trols on the:
HYDRAULIC CIRCUIT
CHECK:
1.
Water circuit filling.
2.
Water filter cleaning.
3.
Pressure switch or flow switch control.
4.
The absence of air in the circuit (bleeding).
5.
That the water flow rate to the evaporator is con-
stant.
6.
The thermal insulation of the hydraulic piping.
7.
The percentage of glycol, when envisioned.
ELECTRIC CIRCUIT
CHECK:
8.
Safety device efficiency.
9.
The electric power supply voltage.
10. Electrical absorption.
11. Connections tightness.
12. The operation of the compressor guard resistance.
COOLING CIRCUIT
CHECK:
13. State of compressor.
14.
Plate exchanger resistance efficiency.
15. Work pressure.
16.
Leak test for water tightness control of the cooling
circuit.
17. Operation of high and low pressure switches.
18.
Carry out the appropriate checks on the filter dry-
er to check efficiency.
MECHANICAL CHECKS
CHECK:
1. The tightening of the screws
, the compressors
and the electrical box, as well as the exterior pan-
elling of the unit. Bad fixing can cause abnormal
noises and vibrations.
2.
The state of the structure.
3.
If there are any oxidised parts, treat with paint
suitable to eliminate or reduce oxidation.
EXTRAORDINARY MAINTENANCE
The units are filled with
...........
gas and are inspected at
the factory. Under normal conditions they do not require
Technical Assistance related to control of refrigerant gas.
Through time gas leakage may be generated, causing
refrigerant to escape and discharge the circuit, causing
appliance malfunctioning. In these cases the refrigerant
leakage points must be detected, repaired and the refrig-
erant load is to be replenished, respecting Law n°549 law
dated 28 December 1993.
DISPOSAL
Envisions that disposal of the unit is carried out in con-
formity with the Standards in force in the different coun-
tries
17. ROUTINE MAINTENANCE
18. EXTRAORDINARY MAINTENANCE
R410A
