Daikin EWAD620-C17C-SL, Руководство по обслуживанию

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ESIE10-01 General Outline
Part 1 – System Outline 1–97
3
1
4
5
Note: Water inlet and outlet are indicative. Please refer to the machine dimensional diagrams for exact
water connection of the partial recovery exchangers.
Description of the
refrigeration cycle
with partial heat
recovery The low-temperature refrigerant gas from the evaporator is drawn by the compressor through the
electric motor, cooling it. It is subsequently compressed and during this process, the refrigerant mixes
with the oil from the oil separator.
The high-pressure oil-refrigerant mix is drawn into the high-efficiency oil separator, that separates it.
The oil depositing on the bottom of the separator through pressure difference is sent back to the
compressor while the refrigerant that has been separate from the oil is sent to the partial recovery
exchanger, where it dissipates the heat from post-overheating cooling, warming the water which
travels through the exchanger. On leaving the exchanger, the refrigerant fluid enters the condensation
bank where, by forced ventilation, it is condensed.
The condensed fluid at saturation temperature passes through the subcooling section where it loses
even more heat, increasing cycle efficiency.
The subcooled fluid then passes through the high-efficiency filter dryer. It subsequently passes
through the lamination element, which, by means of a pressure drop, starts the evaporation process.
The result at this point is a low-pressure and low-temperature liquid-gas mixture entering the
evaporator.
When the refrigerant liquid-vapour is uniformly distributed in the direct expansion evaporator tubes,
heat is exchanged with the cooling water, thus reducing the temperature, changing state until complete
evaporation, followed by superheating.
Once it has reached the superheated-vapour state, the refrigerant leaves the evaporator and is once
again taken into the compressor to repeat the cycle.
7 Condensation bank
8 Load valve
9 2-way angle valve
10 Filter dryer
11 Sight glass
12 Solenoid valve
13 Thermostatic expansion valve
14 Non-return valve
15 Electronic expansion valve
16 Water outlet temp. transducer
17 Evaporator
18 Water inlet temp. transducer
19 Low-pressure safety valve
20 Suction valve (optional)
21 Suction gas temp. transducer
22 Suction gas press. transducer
23 High-pressure pressure switch
24 Oil/delivery press. transd.
25 Delivery gas temp. transducer
26 Liquid injection valve
27 Liquid injection mesh filter