Daikin EKHBX008BB3V3S Installation Manual

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Daikin EKHBX008BB3V3S Installation Manual Manual pdf 10 page image

Installation manual7 EKHBX008BB3V3SIndoor unit for air to water heat pump system4PW62597-1 – 10.2010Pump operationWith no thermostat connected to the indoor unit (2), the pump (5) canbe configured to operate either as long as the indoor unit is on, oruntil the required water temperature is reached.Space heating and coolingAccording to the season, the customer will select heating or coolingthrough the user interface on the indoor unit.The outdoor unit (1) will operate in heating mode or cooling mode toachieve the target leaving water temperature.With the unit in heating mode, the 2-way valve (7) is open. Hot wateris provided to both the fan coil units and the floor heating loops.With the unit in cooling mode, the 2-way valve (7) is closed to preventcold water running through the floor heating loops (FHL).The ON/OFF setting of the heating/cooling operation is done by theuser interface on the indoor unit.Application 5Space heating with an auxiliary boiler (alternating operation)Space heating application by either the Daikin indoor unit or by anauxiliary boiler connected in the system. The decision whether eitherthe EKHB* indoor unit or the boiler will operate can be achieved by anauxiliary contact or an EKHB* indoor controlled contact.The auxiliary contact can e.g. be an outdoor temperature thermostat,an electricity tariff contact, a manually operated contact, etc. See"Field wiring configuration A" on page 7.The EKHB* indoor unit controlled contact (also called 'permissionsignal for the auxiliary boiler') is determined by the outdoortemperature (thermistor located at the outdoor unit). See "Field wiringconfiguration B" on page 8.Bivalent operation is only possible for space heating operation, notfor the domestic water heating operation. Domestic hot water in suchan application is always provided by the domestic hot water tankwhich is connected to the Daikin indoor unit.The auxiliary boiler must be integrated in the piping work and in thefield wiring according to the illustrations below.1 Outdoor unit2 Indoor unit3 Heat exchanger4 Backup heater (1)5 Pump (field supply)6 Shut-off valve7 Motorised 3-way valve (delivered with domestic hot watertank)8 Non-return valve (field supply)9 Shut-off valve (field supply)10 Collector (field supply)11 Boiler (field supply)12 Aquastat valve (field supply)13 Domestic hot water tank (optional)14 Booster heater (2)15 Heat exchanger coilFHL1...3 Floor heating loopField wiring configuration AB TI Boiler thermostat inputA Auxiliary contact (normal closed)H Heating demand room thermostat (optional)K1A Auxiliary relay for activation of EKHB* unit (field supply)K2A Auxiliary relay for activation of boiler (field supply)INFORMATIONDetails on pump configuration can be found under"8.3. Pump operation configuration" on page 24.NOTICE■ When closing several loops in the system by remotelycontrolled valves, it might be required to install a by-pass valve (10) to avoid the flow switch safety devicefrom being activated. See also "Application 2" onpage 5.■ Wiring of the 2-way valve (7) is different for a NC(normal closed) valve and a NO (normal open) valve!Make sure to connect to the correct terminal numbersas detailed on the wiring diagram.CAUTION■ Be sure that the boiler and the integration of the boilerin the system is in accordance with the applicablelegislation.■ Daikin can not be put responsible for incorrect orunsafe situations in the boiler system.(1) For tank without electrical booster heater (EKHTS), the backup heater willbe used in domestic water heating mode.(2) Only applicable for tank with built-in electrical booster heater (EKHW*).MFHL1FHL2FHL3889912116104321 6 5 71314 151 2 3 4K1AK1A K2AX YK2ABTILNEKHB*/auto / BoilerAEKHB*X2MH Com