Daikin EWAQ004BAVP Installation Manual

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Daikin EWAQ004BAVP Installation Manual Manual pdf 9 page image

4 InstallationInstallation manual9EWAQ+EWYQ004+005BAVPPackaged air-cooled water chillers and packaged air to water heatpumps4P469106-1 – 2017.01WARNINGDue to presence of glycol, corrosion of the system ispossible. Uninhibited glycol will turn acidic under theinfluence of oxygen. This process is accelerated by thepresence of copper and high temperatures. The acidicuninhibited glycol attacks metal surfaces and formsgalvanic corrosion cells that cause severe damage to thesystem. Therefore it is important that:▪ the water treatment is correctly executed by a qualifiedwater specialist,▪ a glycol with corrosion inhibitors is selected tocounteract acids formed by the oxidation of glycols,▪ no automotive glycol is used because their corrosioninhibitors have a limited lifetime and contain silicateswhich can foul or plug the system,▪ galvanized pipes are NOT used in glycol systems sincethe presence may lead to the precipitation of certaincomponents in the glycol's corrosion inhibitor.Adding glycol to the water circuit reduces the maximum allowedwater volume of the system. For more information, refer to thechapter "To check the water volume and flow rate" in the installerreference guide.4.3.3 To fill the water circuit1 Connect the water supply hose to the drain and fill valve.2 Open the drain and fill valve.3 If an automatic air purge valve was installed, make sure it isopen.4 Fill the circuit with water until the manometer (field supply)indicates a pressure of ±2.0 bar.5 Purge as much air as possible from the water circuit. Forinstructions, see "6 Commissioning" on page 16.6 Refill the circuit until the pressure is ±2.0 bar.7 Repeat steps 5 and 6 until no more air is purged and there areno more pressure drops.8 Close the drain and fill valve.9 Disconnect the water supply hose from the drain and fill valve.4.3.4 To insulate the water pipingThe piping in the complete water circuit MUST be insulated toprevent condensation during cooling operation and reduction of theheating and cooling capacity.To prevent the freezing of the outdoor water piping during wintertime, the thickness of the sealing material MUST be at least 13 mm(with λ=0.039 W/mK).If the temperature is higher than 30°C and the humidity is higherthan RH 80%, the thickness of the insulation materials should be atleast 20 mm to prevent condensation on the surface of theinsulation.During winter, protect the water piping and shut‑off valves againstfreezing by adding heat tape (field supply). If the outdoortemperature can drop below –20°C and no heat tape is used, it isrecommended to install the shut‑off valves indoors.4.4 Connecting the electrical wiringDANGER: RISK OF ELECTROCUTIONWARNINGALWAYS use multicore cable for power supply cables.4.4.1 To connect the electrical wiring on theoutdoor unit1 Remove the switch box cover. See "4.1.1 To open the outdoorunit" on page 5.2 Insert the wiring from the back of the unit:abc≥25 mma Low voltageb High voltagec Main power supplyNOTICEThe distance between the high voltage and low voltagecables should be at least 25 mm.Routing Possible cables (depends on the installed options)aLow voltage▪ User interface▪ Interconnection cable to control box EKCB07CAV3▪ Remote outdoor sensor (option)bHigh voltage▪ Normal kWh rate power supply▪ Preferential kWh rate power supply▪ Shut-off valve (field supply)▪ Space heat/cool operation control