23P362438-3H E nglish1 Introduction1 1 General informationThis installation manual concerns the VRV IV, full inverter driven, heatpump system.6 73542154631 VRV IV Heat Recovery outdoor unit2 Refrigerant piping3 BS unit4 VRV indoor unit5 Cool/Heat selector (single BS unit only)6 User interface (dedicated depending on indoor unit type)7 User interface (wireless, dedicated depending on indoor unittype)INFORMATIONNot all combinations of indoor units are allowed. For guidance, see1.2. Combination and options on page 2.1 2 Combination and optionsThe VRV IV heat recovery system can be combined with several typesof indoor units and is intended for R410A use only.For an overview which units are available you can consult the productcatalogue for VRV IV.NOTETo be sure your system setup (outdoor unit + BS unit(s) + indoorunit(s)) will work, you have to consult the latest technical engineeringdata for VRV IV heat recovery.An overview is given indicating the allowed combinations of indoorunits and outdoor units. Not all combinations are allowed. They aresubject to rules (combination between outdoor-indoor, single outdoorunit use, multiple outdoor unit use, combinations between indoorunits, etc.) mentioned in the technical engineering data.1 2 1 Indoor unit combinationsIn general VRV indoor units can be connected to a VRV IV heat recov-ery system.1 2 2 Outdoor unit combinationsStandard combinations for VRV IV heat recovery system are asindicated in tables below and right, where REYQ192-456 consists ofseveral REYQ72-168 modules as indicated.72 96 120 144 168REYQ72TTJU/TYDN 1REYQ96TTJU/TYDN 1REYQ120TTJU/TYDN 1REYQ144TTJU/TYDN 172 96 120 144 168REYQ168TTJU/TYDN 1REYQ192TTJU/TYDN 1 1REYQ216TTJU/TYDN 1 1REYQ240TTJU/TYDN 1 1REYQ264TTJU/TYDN 1 1REYQ288TTJU/TYDN 2REYQ312TTJU/TYDN 1 1REYQ336TTJU/TYDN 2REYQ360TTJU/TYDN 3REYQ384TTJU/TYDN 1 1 1REYQ408TTJU/TYDN 1 1 1REYQ432TTJU/TYDN 3REYQ456TTJU/TYDN 2 1To install the outdoor unit, the following optional parts are also required.1 Refrigerant branching kit.Description Model namefor 3 piping for 2 pipingREFNET headerKHRP25M33H9 KHRP26M22H9KHRP25M72H9 KHRP26M33H9KHRP25M73HU9 KHRP26M72H9REFNET jointKHRP25A22T9 KHRP26A22T9KHRP25A33T9 KHRP26A33T9KHRP25M72TU9 KHRP26M72TU9KHRP25M73TU9 –For the selection of the optimal branching kit, please refer to7.4. Selection of refrigerant branch kits on page 10.2 Outdoor unit multi connection piping kit.Number of outdoor units connected2 3BHFP26P100U BHFP26P151U3 In order to control the cooling or heating operation from a centrallocation, the following option can be connected:- Cool/Heat selector: KRC19-26A- With optional fixing box for the switch: KJB111A- Centralized control devices (e.g., intelligent Touch Manager)4 To instruct specific operation with an external input coming from acentral control the external control adaptor (DTA104A61/62) canbe used. Instructions (group or individual) can be instructed for lownoise operation and power consumption limitation operation.5 For VRV IV heat recovery system it is also possible to make severalcommissioning field settings through a personal computer inter-face. For this option EKPCCAB* is required which is a dedicatedcable to communicate with the outdoor unit. The software for theuser interface program can be obtained from your local Daikinsales office.INFORMATIONRefer to the technical engineering data for the latest option names.