Daikin EWWQ-KC, Инструкция по установке, эксплуатации и обслуживанию

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D-EIMHP01501-22_00EN 10/20
9. CONNECTING THE WATER CIRCUIT
The evaporator and condenser are foreseen of
GAS
male pipe thread for the water inlet and outlet (refer to the outlook
diagram). Evaporator and condenser water connections are to be made in accordance with the outlook diagram, respecting
the water in- and outlet.
If air, moisture, or dust gets in the water circuit, problems may occur. Therefore, always consider the following when
connecting the water circuit:
1. Use clean pipes only.
2. Hold the pipe end downwards when removing burrs.
3. Cover the pipe end when inserting it through wall so that no dust and dirt enter.
WARNING
Use a good thread sealant for the sealing of the connections. The sealing must be able to
withstand the pressures and temperatures of the system, it must also be resistant to the used glycol in the water.
The external surface of the water pipes must be adequately protected against corrosion.
10. WATER CHARGE, FLOW AND QUALITY
To assure proper operation of the unit a minimum water volume is required in the system and the water flow through the
evaporator must be within the operation range as specified in the table below.
Table 4- Water flow operation range
WARNING The water pressure should not exceed the maximum working pressure of 10 bar.
WARNING Provide adequate safeguards in the water circuit to make sure that the water pressure will
never exceed the maximum allowable working pressure.
11. PIPING INSULATION
The complete water circuit, inclusive all piping, must be insulated to prevent condensation and reduction of the cooling
capacity.
11.1 Antifreeze protection for BPHE and recovery exchangers
If the heat exchangers are completely empty and cleaned with antifreeze solution, additional methods can be used
against freezing.
The following protection methods must be considered when designing the system as a whole:
1. continuous water flow circulation inside piping and exchangers.
2. addition of an appropriate amount of glycol inside the water circuit or, as alternative, an additional heat insulation and
heating of exposed piping (internal and external to the unit);
3. if the unit does not work during the winter season, emptying and cleaning of the heat exchanger.
It is the responsibility of the installer and/or of local maintenance personnel to ensure that described antifreeze methods
are used.
Make sure that appropriate antifreeze protection is always maintained. Failing to follow the instructions above could
result in unit damage.
Damage caused by freezing is excluded from the warranty, therefore
Daikin Applied Europe S.p.A
. declines all
responsibility.
Minimum water volume (I) Minimum water flow Maximum water flow
EWWQ014 62 31 l/min 75 l/min
EWWQ025 134 53 l/min 123 l/min
EWWQ033 155 76 l/min 186 l/min
EWWQ049 205 101 l/min 247 l/min
EWWQ064 311 152 l/min 373 l/min