MPE
38
All copying, even partial, of this manual is strictly forbidden
RG66007169 - Rev 00
8
ROUTINE MAINTENANCE AND CHECKS
It is recommended to carry out periodic checks of the safety devices (pressure switches and safety valves) and verify the absence of refrigerant leaks.
After the first start-up, the periodic checks must be carried out in conformity with the schedule and the manners provided for by current national
regulations.
To keep the unit in good working order and guarantee the expected levels of performance and safety, it is necessary to carry out some periodic routine
checks: some may be performed directly by the user while others must be carried out solely by specialised personnel.
8.1
CHECKS TO BE PERFORMED BY THE USER
The checks and operations described in this section may be easily performed by the user, provided that the latter shows a minimum of attention.
- Remove any dirt that has built up around the coil or objects trapped in the mesh protecting the coil itself (leaves, paper etc., to be carried out monthly).
Warning
Be especially careful when working in proximity to finned coils since the aluminium fins are extremely sharp and can cause cuts.
- Check the level of water in the circuit using the water pressure gauge, which should indicate a pressure of about 1.5 bars (monthly).
- Check that the escape pipe of the water safety valve is tightly secured.
- Check the water circuit for leaks (monthly).
- If the unit is to remain out of service for a long time, drain the water (or other fluid present in the circuit) from the pipes and the unit itself.
This is indispensable if during the period of quiescence the ambient temperature is expected to fall below the freezing point of the fluid used (seasonal
operation).
Drain the unit and parts of the circuit subject to the risk of freezing by opening the RS (optional) emptying tap.
Before placing the unit back in service at the start of the season, refill the water circuit as directed in section 1.4
- Check that the noise emissions of the unit are regular (monthly).
- If necessary, release the pump rotor ("P" and "S" version)
8.2
CHECKS AND MAINTENANCE TO BE PERFORMED BY SPECIALISED PERSONNEL
Warnings
Important!
All the operations described in this section MUST ALWAYS BE PERFORMED BY QUALIFIED PERSONNEL.
Warning
Before carrying out any work on the unit or accessing internal parts, make sure you have disconnected it from the mains electricity
supply.
Warning
The upper part of the compressor casing and the outlet pipe reach high temperatures. Be especially careful when working in their
vicinity.
Warning
Be especially careful when working in proximity to the finned coils: the aluminium fins are extremely sharp and can cause cuts.
Important!
After completing maintenance jobs, always replace the panels enclosing the unit and secure them with the fastening screws provided.
The checks and operations described in this section must be carried out on a yearly basis by specialised personnel.
- Check the electric control board terminals to ensure that they are securely tightened: the movable and fixed contacts of the circuit breakers must be
periodically cleaned and replaced whenever they show signs of deterioration.
- Check the compressor and pipes for oil leaks.
- Check the efficiency of the water differential pressure switch.
- Clean the metal filters mounted in the water pipes.
- Clean the finned coil by aiming a jet of compressed air in a direction opposite to the outflow of air, taking care not to bend the fins.
9 RETIRING
THE
UNIT
When the unit has reached the end of its working life and needs to removed and replaced, a series of operations should be carried out:
- the refrigerant gas it contains should be recovered by specialised personnel and sent to a waste collection facility;
- the lubricating oil in the compressor should also be recovered by specialised personnel and sent to a waste collection facility;
- if they cannot be reused, the framework and components should be scrapped and separated according to the type of material: this applies especially
for the considerable quantities of copper, aluminium and steel present in the unit.
This will make the job of waste collection, disposal and recycling facilities easier and minimise the environmental impact of the dismantling.
Installation and maintenance should be carried out by technical personnel qualified for this type of machine, in compliance with current safety regulations.
When receiving the unit please check its state verifying if any damage occurred during the transport.
For installation and use of possible accessories please refer to the pertinent technical sheets.
