Operation Manual

20
ENGLISH
6. HIBERNATION PROCEDURE
1. Switch off the filtering pump.
2. Turn off valves 2 and 3 of the by-pass.
3. Open completely valve 1.
4. Drain the exchanger to protect it from ice, disassembling the inlet and outlet connectors of the heat pump.
5. Once drained part of the condenser, assemble the connectors.
6. Check the connectors of the heat pump to restrict the entrance of foreign bodies to the exchanger.
7. MAINTENANCE INSTRUCTIONS
Installation and maintenance
 In the event of any intervention in the unit, installation, start-up or maintenance, the personnel in charge of these
operations must be familiar with both the instructions and recommendations contained in the installation manual
and the elements of the project.
 The personnel in charge of the receipt of the unit will perform a visual inspection in order to verify the possible
damages suffered in the transport: refrigeration circuit, electrical cabinet, frame and housing.
 It is prohibited to place the unit near:
Heat sources Flammable materials · Building air intakes
 The unit must de installed, started-up, repaired and maintained by qualified personnel according to applicable
regulations and laws.
 During installation, repairs and maintenance piping should not be tread on or used as a support, otherwise the
piping could break and the R-407-C gas could cause severe burns.
 During maintenance of the unit, the composition and state of the gas will be revised as well as possible oil
stains (leaks in the refrigeration circuit).
 During the annual maintenance revision of circuit water tightness according to regulations, verify that the high-
pressure and low-pressure controllers are properly connected to the refrigeration circuit and that they switch off
the electrical circuit in case of failure.
 In the event of any manipulation or intervention on the refrigeration circuit, it is obligatory to switch off the unit
and wait several minutes before puncturing pressure gauges or measuring temperatures. Some elements such
as the compressor and pipes can reach high temperatures and high pressures that can lead to important burns.
 Never add oil to the unit; the compressor is loaded with specific oil, polyol ester (POE) that does not tolerate the
presence of other types of oil.
 The instruments used for the load, pressure measurement, creation of a vacuum and recovery of the liquid must
be compatible and be only used for the R 407 C liquid.
 The weight of the coolant contained in the storage deposit must be constantly verified. If the remaining weight is
lower than 10% of the gross weight, do not use it.
 In the event of a new charge:
-Do not use the load cylinder
-Use a balance and a bottle of R 407 C with an immersion tube
-Load the weight of R 407 C following the value indicated in the plate where the characteristics of the
unit are specified.
-The load must be done in liquid phase.
 In case of leaks, do not complete the load: recover the remaining liquid for its recycling and carry out a full load
again. The recovery, recycling or destruction of liquid should always be carried out in accordance with the
applicable laws in each country.
 If the refrigeration circuit is open, the following tasks must be carried out:
-Minimize the entrance of ambient air in the circuit
-Replace the dehydrator.
-Carry out the “creation of a vacuum” to a minimum level of 0.3 mbar (static).