Daikin VRV W T-Series Installation Manual

Also see for RWEQ120TAYCU: Operation manual Installation manual

Contents

4 PreparationInstallation manual18RWEQ96~432TAYCUVRV W T-Series water-cooled system air conditioner4P540122-1B – 2018.11The valve/pump input signal is based on a variable 2~9 V DC controloutput signal coming from the outside unit. The valve or pumpshould have a linear control characteristic between unit output signaland flow rate according to the example graph below.0%BEDCca bA50%100%2 V DC 9 V DCa Valve/pump flow rateb Unit/system flow ratec Valve/pump input signalA Maximum required flow rate (100%)B 50% of the maximum required flow rateC Minimum flow rate (see description below)D Maximum flow rate (see description below)E Hydronic flow rateFollow the design criteria below to select the correct valve for thesystem. The valve system maximum required flow rate A is aproperty of the supplied valve and the 50% flow rate B is directlyrelated to the maximum flow rate of the system.INFORMATIONSome third party valves/pumps have a maximum flow ratedefined by the hardware of the system, but a differentmaximum flow rate can be set to correspond with themaximum input voltage (9 V DC) The installer should askinformation to the valve/pump supplier before making theselection.Design criteria1 Minimum flow rate C:Model CRWEQ96~144 13.2 gpm (50 l/min)21.2 gpm (80 l/min) (a)(a) For antifreeze use2 Maximum flow rate D:Model DRWEQ96~144 39.6 gpm (150 l/min)3 Hydronic flow rate E:The value E is the design flow rate calculated by the hydronicengineer when designing the building system.Correct valve selection is done when following conditions are met:(B≥C) AND (E≤A≤D)For further selection requirements, refer to "4.5 Field wiring" onpage 18.Check the minimum flow rate of the system during commissioning toensure good operation.During the initialization process of the outside unit, the output signalwill trigger a flow rate of B (50%). The installer should make surethat a flow rate can be checked in the individual hydronic system ofeach unit. If this value is not matching the required flow, the installershould troubleshoot the hydronic system to solve the problem andensure the correct flow rate.4 5 Field wiring4 5 1 Safety device requirementsThe power supply must be protected with the required safetydevices, i.e. a main switch, a slow blow fuse on each phase and/or acircuit breaker.Selection and sizing of the wiring should be done in accordance withthe applicable legislation based on the information mentioned in thetable below.Model Minimum circuitampacityRecommendedfusesRWEQ96TAYCU 13.0 A 15 ARWEQ120TAYCU 16.3 A 20 ARWEQ144TAYCU 19.9 A 25 ARWEQ192TAYCU 13.0+13.0 A 15+15 ARWEQ216TAYCU 13.0+16.3 A 15+20 ARWEQ240TAYCU 16.3+16.3 A 20+20 ARWEQ264TAYCU 16.3+19.9 A 20+25 ARWEQ288TAYCU 19.9+19.9 A 25+25 ARWEQ312TAYCU 13.0+13.0+16.3 A 15+15+20 ARWEQ336TAYCU 13.0+16.3+16.3 A 15+20+20 ARWEQ360TAYCU 16.3+16.3+16.3 A 20+20+20 ARWEQ384TAYCU 16.3+16.3+19.9 A 20+20+25 ARWEQ408TAYCU 16.3+19.9+19.9 A 20+25+25 ARWEQ432TAYCU 19.9+19.9+19.9 A 25+25+25 A▪ Phase and frequency: 3 ~ 60 Hz▪ Voltage: 575 V (RWEQ96~432TAYCU)▪ Transmission line section insulated: AWG 18~16, maximumlength is 3280 ft (1000 m). If the total transmission wiring exceedsthese limits, it may result in communication error.NOTEWhen using residual current operated circuit breakers, besure to use a high-speed type 300 mA rated residualoperating current.