Trane Picco R32-140, User& Installer'S Manual

Picco R32 

Inverter air/water heat pumps with axial fan

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If the temperature drops below zero there is serious danger of frost: provide a mixture of water and glycol in the system, 

otherwise drain the water system and the circuits of the heat pump.

CAUTION: even the transient operation, with water temperatures below +5°C is not guaranteed on the basis of the limits es

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tablished. Before you turn the unit back on after a long idle period, make sure that the temperature of the mixture of water 

and glycol is higher than or at least equal to +5°C.

In the versions designed for low temperature operation (-8 ° C ÷ + 4 ° C), the concentration of glycol present and the relative 

freezing point must always be checked. Below this temperature it is forbidden to start the unit.

9. 

MAINTENANCE AND PERIODIC CHECKS

CAUTION: All the operations described in this chapter MUST BE CARRIED OUT BY QUALIFIED PERSONNEL ONLY. Before per

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forming any intervention on the unit or accessing internal parts, make sure you have disconnected power.

CAUTION: Before starting to operate, safety checks must be performed to ensure the combustion hazard is reduced to the 

minimum. The work must be undertaken according to a controlled procedure, to reduce to the minimum the risk of flam

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mable gases or vapours while performing the work. The area must be checked with an appropriate refrigerant fluid detector 

before and during the work.

Maintenance must only be carried out in weather conditions suitable for the operations envisaged.

For maintenance, the use of a lock-valve (access valve to the refrigeration circuit) is strongly recommended, in order to avoid 

gas leaks and the risk of burns.

CAUTION: It is possible that a certain quantity of oil from the compressor is deposited in the pipes of the refrigeration circuit, 

especially by bends. In case of maintenance operations in which it is necessary to unsolder the pipes, it is strongly recom

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mended to proceed with the cutting of the same and not with the desoldering with a torch, as the flame triggers any oil 

present.

It is prohibited to fill the refrigerant circuits with a refrigerant other than that indicated on the identification plate. Using a 

different refrigerant can cause serious damage to the compressor.

It is prohibited to use oils other than those indicated in this manual. Using a different oil can cause serious damage to the 

compressor.

The heads and delivery pipe of the compressor are normally quite hot.

Be careful when working near the condensing coils.

The aluminium fins are very sharp and can cause serious injuries.

Always use appropriate personal protective equipment.

After maintenance operations, close the panels again, securing them with the fixing screws. Pay particular attention to the 

correct closing of the electric box.

After the maintenance operations, pay attention to the correct tightening of the cable gland designed for the passage of the 

electric power cable.

It is recommended to have specialised personnel perform periodical inspections and maintenance. The EU regulation 

n.517/2014 establishes that users must perform regular inspections on the plants, checking water tightness and eliminating 

any leaks as quickly as possible. Verify the mandatory nature and the documentation required in regulation n.517/2014 and 

its subsequent amendments or repeals.

The following are the recommended and mandatory activities for correct operation of the unit. The mandatory activities must be carried out 

by an authorised customer service which issues a corresponding certificate. Failure to comply with these activities will entail forfeiture of the 

warranty and could considerably shorten the service life of your product.