Daikin ERLQ004CA Installer's Reference Manual

Contents

6 PreparationInstaller reference guide25ERLQ004~008CA + EHBH/X04+08CBDaikin Altherma – Low temperature split4P384972-1B – 2017.04▪ Mind the measurement guidelines:Maximum refrigerant piping length between indoorunit and outdoor unit30 mMinimum refrigerant piping length between indoorunit and outdoor unit3 mMaximum height difference between indoor unit andoutdoor unit20 mMaximum distance between the 3‑way valve andthe indoor unit (for installations with domestic hotwater tank)3 mMaximum distance between the domestic hot watertank and the indoor unit (for installations withdomestic hot water tank)10 m▪ Mind the following spacing installation guidelines:≥115020020010 10 500(mm)Do NOT install the unit in places such as:▪ In places where a mineral oil mist, spray or vapour may bepresent in the atmosphere. Plastic parts may deteriorate and falloff or cause water leakage.▪ Sound sensitive areas (e.g. near a bedroom), so that theoperation noise will cause no trouble.▪ The foundation must be strong enough to bear the weight of theunit. Take the weight of the unit with a domestic hot water tank fullof water into account.Make sure, in the event of a water leak, water cannot cause anydamage to the installation space and surroundings.▪ In places with high humidity (max. RH=85%), for example abathroom.▪ In places where frost is possible. Ambient temperature around theindoor unit should be >5°C.▪ The indoor unit is designed for indoor installation only and forambient temperatures ranging from 5~35°C.6.3 Preparing refrigerant piping6.3.1 Refrigerant piping requirementsINFORMATIONAlso read the precautions and requirements in the"General safety precautions" chapter.▪ Piping material: Phosphoric acid deoxidised seamless copper.▪ Piping diameter:Liquid piping Ø6.4 mm (1/4")Gas piping Ø15.9 mm (5/8")▪ Piping temper grade and thickness:Outer diameter(Ø)Temper grade Thickness (t)(a)6.4 mm (1/4") Annealed (O) ≥0.8 mmtØ15.9 mm (5/8") Annealed (O) ≥1.0 mm(a) Depending on the applicable legislation and the unit'smaximum working pressure (see "PS High" on the unitname plate), larger piping thickness might be required.6.3.2 Refrigerant piping insulation▪ Use polyethylene foam as insulation material:▪ with a heat transfer rate between 0.041 and 0.052 W/mK (0.035and 0.045 kcal/mh°C)▪ with a heat resistance of at least 120°C▪ Insulation thicknessPipe outer diameter(Øp)Insulation innerdiameter (Øi)Insulation thickness(t)6.4 mm (1/4") 8~10 mm 10 mm15.9 mm (5/8") 16~20 mm 13 mmØiØitØpØpIf 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.6.4 Preparing water piping6.4.1 Water circuit requirementsINFORMATIONAlso read the precautions and requirements in the"General safety precautions" chapter.NOTICEIn case of plastic pipes, make sure they are fully oxygendiffusion tight according to DIN 4726. The diffusion ofoxygen into the piping can lead to excessive corrosion.▪ Connecting piping – Legislation. Make all piping connections inaccordance with the applicable legislation and the instructions inthe "Installation" chapter, respecting the water inlet and outlet.▪ Connecting piping – Force. Do NOT use excessive force whenconnecting the piping. Deformation of the piping can causemalfunctioning of the unit.▪ Connecting piping – Tools. Only use appropriate tooling tohandle brass, which is a soft material. If NOT, pipes will getdamaged.▪ Connecting piping – Air, moisture, dust. If air, moisture or dustgets into the circuit, problems may occur. To prevent this:▪ Only use clean pipes▪ Hold the pipe end downwards when removing burrs.▪ Cover the pipe end when inserting it through a wall, to preventdust and/or particles entering the pipe.▪ Use a decent thread sealant to seal connections.▪ Closed circuit. Use the indoor unit ONLY in a closed watersystem. Using the system in an open water system will lead toexcessive corrosion.