Daikin EKHHP300AA2V3 Installation And Maintenance Manual

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Installation and maintenance manual14DAIKIN EKHHP(3/5)00AA2V3DAIKIN Hot water heat pump008.1423444_02 – 09/20152 x Set-up and installation2.8.1 EKHHP on heat pump external unit, mainsconnection Booster Heater (BOH)● Check the supply voltage (~230 V, 50 Hz).● Disconnect the junction box of the domestic installation.● Install the heat pump external unit.● Lay the mains and communication cable (4 core, 0.75 mm²)between heat pump external unit and DAIKIN EKHHP.● Connect mains and communication cable to heat pumpexternal unit (see relevant installation instructions).● Connect DAIKIN EKHHP to the heat pump external unit(see fig. 2-8).● Lay the cable (3 core, >1.5 mm²) for the power supply to theBooster Heater between distributor box of the house instal-lation and the DAIKIN EKHHP.● Connect the cable for power supply on the Booster Heaters tothe DAIKIN EKHHP (see fig. 2-8).● Connect the cable for power supply to the Booster Heater onthe distributor box of the house installation (see fig. 2-8).2.8.2 Low tariff mains connection (HT/NT)If the external unit is connected to a low tariff mains connection,the potential-free switch contact 4 of the receiver that eval-uates the low tariff input signal transmitted by the electricitysupply company (EVU) must be connected to the connectionsGND/IN1 of the DAIKIN EKHHP (see fig. 2-9).When setting the parameter [7-00] > 0 certain system compo-nents are switched off during high tariff times (see operating in-structions for the controller).The potential-free switching contact GND/IN1 can be designedas a normally-closed or a normally-open switching contact.a) If it is configured as a normally-open switching contact,then the parameter [7-00] = 1 must be set.If the EVU transmits the reduced tariff signal, the switchingcontact HT/LT is closed. The installation switches to"Reduced Mode". If the signal is sent again, the potential-freeswitching contact HT/LT opens and the system resumesoperation.b) If it is configured as a normally-closed switching contact,then the parameter [7-00] = 2 must be set.If the EVU transmits the reduced tariff signal, the switchingcontact HT/LT is opened. The installation switches to"Reduced Mode". If the signal is sent again, the potential-freeswitching contact HT/LT closes and the system resumesoperation.2.8.3 Connection intelligent controller (Smart Grid -SG)Once the function is activated by the parameter [7-00] = 3 (seesection 5.5.2), the heat pump is changed to Stand-By, Normal oran operating mode with higher temperatures, depending on thesignal from the energy supply company.For this you need to connect the potential-free switching con-tacts HT/NT + SG of the intelligent regulator to the connections(GND+IN1) / (GND+IN2) on the DAIKIN EKHHP (see fig. 2-9).As soon as the Smart Grid function is active, the HT/NT functionis deactivated automatically. Depending on the value of the pa-rameter [7-00] the heat pump is operated in a different manner(see operating manual for the controller).2.8.4 Optional: External heat generator installationWhen using an external heat generator, this can be connectedusing a potential-free switching contact (NT/LT) on the DAIKINEKHHP.If the potential-free switching contact is closed by an externalheat generator, the DAIKIN EKHHP reduces its own heat gener-ation to allow the external heat generator have priority (for set-tings see chapter 5.5.2).ERWQ02AV3 Heat pump external unitFig. 2-8 Electrical connection DAIKIN EKHHPWhen switching off the heat pump external unit using aswitching system prescribed by the energy supply com-pany (EVU), the DAIKIN EKHHP is switched off as well.This complete switch-off of the heat pump external unitis an optional installation and must only be carried outby experts.HT/NT Low tariff mains connection (EVU receiver)SG Smart Grid - connection (EVU receiver)GND+IN1 Connection HT/NT-swiych contact on EKHHPGND+IN2 Connection Smart Grid-switch contact on EKHHPX2M Terminal rail on EKHHPFig. 2-9 Electrical connection HT/NT- and Smart Grid switching con-tactGND Connection potential-free switching contact on EKHHPIN1 Connection potential-free switching contact on EKHHPWEX External heat generatorX2M Terminal rail on EKHHPFig. 2-10 External heat generator electrical connection