Daikin EKHVMYD50ABV1 [7/64] Main components in the unit

When circulation in each space heating radiator loop is controlled by remotely controlled valves it is important that this minimum water volume is kept even if all the valves are closed 15

12 14 14 16 13 16

3 4 5 6 8 2 21 16

Fan coils without tank application examples with several heat emitters 16

Refer to chapter 9 multiple set point control on page 46 for more information about the conﬁguration of your system 16

Such installations must be done using a balancing bottle and each kind of heat emitter should have a speciﬁc pump 16

Using different heat emitters means using different water set points for the system 16

Application examples for reversible units 6 selection of meters for billing purpose 17

Check the meter supplier documentation for detailed installation instructions before installation of the meters check the following points 17

Daikin advises an allocation method based on the measurements of consumed heat of each indoor unit following measurements are required 17

I all heat meters and heating and cooling meters in the apartment building are to be installed at identical piping distance from the indoor unit 17

I all heat meters in the apartment are to be supplied by the same supplier 17

I avoid installation of meters inside the indoor unit service space in order to guarantee indoor unit servicing 17

I ekhvmrd by means of a heat meter 17

I ekhvmyd by means of a heat and cooling meter 17

I install separate watt hour meter for each outdoor unit 17

I the indoor unit energy consumption 17

I the indoor unit energy consumption during domestic hot water operation if installed by means of a heat meter 17

I the outdoor unit power consumption by means of an electrical power meter 17

I to facilitate readout and service work heat meters should be easily accessible choose a mounting location with sufﬁcient clearance for data read out 17

In order to avoid radiator sweating during cooling operation shut off valve 20 should be installed this shut off valve can be controled from the indoor unit by connecting to x2m position 17 and 18 refer to wiring diagram for further details 17

Refer to databook for speciﬁcations to be used for meter selection 17

Selection and installation of the meters should be done in accordance with applicable legislation 17

The selection of the meters for billing purpose is the choice of the end customer 17

Warning 17

13 20 19 18

19 13 12 18

6 7 2 3 18

Billing application examples 18

Ekhvmyd tank heat meter between tank and indoor unit ekhvmyd tank heat meter on tapping side 18

11 18 17 19

4 5 6 7 9 13 19

4 5 6 7 9 13 18 17 19

Ekhvmrd tank heat meter between tank and indoor unit ekhvmrd tank heat meter on tapping side 19

General precautions on installation location 20

Nstallation of the unit 20

Selecting an installation location 20

Dimensions and service space 21

Dimensions of unit 21

Inspecting handling and unpacking the unit 23

Installing the unit 23

Preparation before installation on ﬁnal installation place 23

Service space of the unit 23

Connecting the water circuit 25

Installation on ﬁnal installation position 25

Close the unit 26

Fix the indoor unit refrigerant connections 26

Checking the water volume and expansion vessel pre pressure 27

Leak test and vacuuming drying r410a circuit 27

Water piping 27

Setting the pre pressure of the expansion vessel 28

Charging water 29

Lectrical wiring work 29

Precautions on electrical wiring work 29

Internal wiring parts table 30

A power supply see table below must be provided for connection of the unit the power supply must be protected with the required safety devices i e a main switch a slow blow fuse on each phase and an earth leakage protector in accordance with applicable legislation 31

Feld supplied 31

Field wiring consists out of power supply multi tenant power supply indoor outdoor communication transmission wiring wiring of the user interface wiring for connection of options and ﬁeld supply accessories 31

For the outdoor unit refer to the wiring diagram of the outdoor unit 31

I carefully install multi tenant power supply this power supply will guarantee correct outdoor unit operation if one tenant shuts of power supply if the multi tenant power supply is not installed the outdoor unit will stop operating if one tenant shuts off the main power supply 31

I if during service the main power supply is cut off for safety of electric shock make sure that also the multi tenant power supply is cut off 31

Included in option kit 31

R10t liquid thermistor cooling 31

R11t suction thermistor cooling 31

Rc a p receiver circuit 31

Requirements 31

S1ph high pressure switch 31

S1s beneﬁt kwh rate power supply contact 31

S3s input multiple setpoint 1 31

S4s input multiple setpoint 2 31

Selection and sizing of the wiring should be done in accordance with the applicable legislation based on the information mentioned in the table below 31

Ss1 a1p selector switch emergency 31

Ss1 a2p selector switch master slave 31

Ss1 a7p selector switch 31

System overview of ﬁeld wiring 31

T1r t2r a p diode bridge 31

T3r power module 31

Tc a p transmitter circuit 31

The wiring diagram on the indoor unit is only for the indoor unit 31

V1c v8c ferrite core noise ﬁlter 31

X m a p pcb terminal strip 31

X1m x3m terminal strip 31

X1y x4y connector 31

Z1f z5f a p noise ﬁlter 31

Connection 32

Routing 32

Installation and connection of the remote controller 33

A beneﬁt kwh rate power supply is only possible for the indoor unit for compressor reliability reasons it is not allowed to connect the outdoor unit to such a power supply 34

Connection to a beneﬁt kwh rate power supply 34

Consult with the electricity company acting as provider at the site where this equipment is to be installed to know whether it is appropriate to connect the equipment in one of the beneﬁt kwh rate power supply delivery systems available if any 34

During the period that the beneﬁt kwh rate is active and power supply is continuous then stand by power consumption of the inverter pcb is possible 34

Electricity companies throughout the world work hard to provide reliable electric service at competitive prices and are often authorized to bill clients at beneﬁt rates e g time of use rates seasonal rates wärmepumpentarif in germany and austria 34

For a beneﬁt kwh rate power supply like illustrated below as type 1 34

I demand that the equipment only consumes a limited amount of electricity during certain periods of time 34

I interrupt power supply to the equipment for certain periods of time 34

In case of beneﬁt kwh rate power supply installation remove the wiring bridges on x2m before installing the normal kwh rate power supply 34

Possible connections and requirements to connect the equipment to such power supply are illustrated in the ﬁgures below warning 34

Possible types of beneﬁt kwh rate power supply 34

The indoor unit is designed to receive an input signal by which the unit switches into forced off mode at that moment the unit compressors will not operate 34

This equipment allows for connection to such beneﬁt rate power supply delivery systems 34

Warning 34

When the equipment is connected to such beneﬁt kwh rate power supply the electricity company is allowed to 34

Pre operation checks 35

Up and configuration 35

Field settings 36

Final air purging 36

Procedure 36

Advantage of this method is that you can simply switch off the space heating operation by pushing the button without disabling the automatic domestic hot water storage operation e g during summertime when no space heating is required 37

By default no level is deﬁned so all buttons and functions are operable the actual permission level is determined by ﬁeld setting for permission level 2 set ﬁeld setting 0 00 to 2 for permission level 3 set ﬁeld setting 0 00 to 3 once the ﬁeld setting is set the chosen permission level is not yet active enabling the selected permission level is done by simultaneously pressing buttons and immediately 37

By default space heating based on temperature set point method 1 is enabled so only temperature shifts are possible no on off instruction 37

Detailed description 37

Followed by simultaneously pressing buttons and and 37

For a summary of all ﬁeld settings refer to 9 field setting table on page 49 37

I 0 00 user permission level the remote controller can be programmed to make certain buttons and functions unavailable for the user there are 2 permission levels deﬁned both levels level 2 and level 3 are basically the same the only difference is that for level 3 no water temperature settings are possible see table below 37

I 0 01 room temperature compensation value if needed it is possible to adjust some thermistor value of the unit by a correction value this can be used as countermeasure for thermistor tolerances or capacity shortage the compensated temperature measured temperature plus compensation value is then used for controlling the system and will be displayed in the temperature read out mode see also 9 automatic temperature compensation on page 39 for compensation values for leaving water temperature and domestic hot water temperature 37

I 0 02 setting not available 37

I 0 03 status deﬁnes whether the on off instruction can be used in the schedule timer for space heating refer to the operation manual for details how to program the schedule timer the schedule timer for space heating can be programmed in 2 different ways based on the temperature set point both leaving water temperature and room temperature and based on the on off instruction 37

In the following tables both methods on how to interpret the schedule timer are shown 37

Keeping all 4 buttons pressed for at least 5 seconds note that no indication on the remote controller is given after the procedure the blocked buttons will not be available anymore deactivating the selected permission level is done in the same way 37

Operation example schedule timer based on temperature set points 37

Remote control setup 37

When setback function is enabled the setback operation will have priority over the scheduled action in the schedule timer 37

Automatic storage is the advised domestic hot water mode in this mode water heats up during the night when space heating requirements are lower until the storage set point the heated water is stored in the domestic hot water tank at a higher temperature so it can fulﬁl the domestic hot water requirements throughout the day 38

Automatic storage timing for domestic water heating 38

For cooling no setback function is available 38

I 0 04 status deﬁnes whether the on off instruction can be used in the schedule timer for cooling same as for 0 03 but for cooling schedule timer 38

I 1 00 status deﬁnes whether the domestic water heating storage mode during night is enabled 1 or not 0 38

I 1 01 start time time of the night at which the domestic water should be heated 38

I 1 02 status deﬁnes whether the domestic water heating storage mode during daytime is enabled 1 or not 0 38

I 1 03 start time time of the day at which the domestic water should be heated 38

I for energy saving purposes it is advised to enable the weather dependent domestic water heating refer to setting b 02 on page 40 38

I make sure the domestic hot water is not heated unnecessary start with activating automatic storage during night default setting if it seems that the domestic hot water night storage operation is not sufﬁcient for your needs an additional storage during daytime can be set 38

In this mode the indoor unit will deliver hot water to the domestic hot water tank based on the daily ﬁxed pattern this mode will continue until storage temperature is reached 38

Off on on 38

Operation example schedule timer based on on off instruction 38

Refer to b domestic hot water set points on page 40 for temperature set points 38

Start with a low domestic hot water storage temperature set point and only increase if you feel that the domestic hot water supply 38

Temperature is not sufﬁcient for your needs this depends on your water using pattern 38

The storage temperature set point and timing are ﬁeld settings 38

When setback function is enabled the setback operation will have priority over the scheduled action in the schedule timer if on instruction is active if off instruction is active this will have priority over the setback function at any time the off instruction will have the highest priority 38

On off 44

Reheat operation 44

Remote controller leaving water temperature control 44

Simultaneous demand of space heating and domestic water heating 44

Storage operation 44

When requesting space heating and domestic water heating reheat at the same time the domestic water will be heated till maximum reheat temperature then space heating will start again 44

When requesting space heating and domestic water heating storage at the same time domestic water will be heated according to running timer then space heating will start again according to running timer then domestic water heating will start again according to running timer this will continue till storage set point is reached 44

When the reheat temperature is reached the further heat up till storage temperature of the domestic hot water tank will be decided by the running timers which are programmed by the installer 44

External room thermostat 45

On off 45

Reheat operation 45

Storage operation 45

When requesting space heating and domestic water heating reheat at the same time the domestic water will be heated till maximum reheat temperature then space heating will start again 45

When requesting space heating and domestic water heating storage at the same time domestic water will be heated according to running timer then space heating will start again according to running timer then domestic water heating will start again according to running timer this will continue till storage set point is reached 45

When the reheat temperature is reached the further heat up of the domestic hot water tank will be decided by the external room thermostat thermo conditions and running timers which are programmed by the installer 45

On off 46

Reheat operation 46

Remote controller room temperature control 46

Storage operation 46

When requesting space heating and domestic water heating reheat at the same time the domestic water will be heated till maximum reheat temperature then space heating will start again 46

When requesting space heating and domestic water heating storage at the same time domestic water will be heated but as soon as the room temperature drops 3 c from set point space heating will start till 0 c above set point then domestic water will be heated again till storage set point 46

When the reheat temperature is reached the further heat up till storage temperature of the domestic hot water tank will be decided by the remote controller room thermostat in order to prevent the room temperature to drop too much 46

Multiple set point control 48

Simultaneous demand of space cooling and domestic water heating 48

Field setting table 51

Final check 53

Inal check and test run 53

Indoor unit individual test run 53

Multi tenant power supply check 53

Procedure for space heating cooling 53

System test run 53

Temperature read out mode 53

Aintenance and service 54

Maintenance activities 54

Procedure for domestic water heating 54

Checks 55

Important information regarding the refrigerant 55

This ﬂow chart indicates the main items and actions which have to be considered during vacuuming recovery operations on the system when certain settings and operations explained in the ﬂow chart are not followed this can be improper operation of the unit due to bad vacuuming recovery in case of problems please contact your local dealer 56

Vacuuming recovery and maintenance on refrigerant side 56

General guidelines 57

Opening the unit 57

Recovery vacuuming overview for 1 indoor unit maintenance r410a circuit connections 57

Roubleshooting 57

System overview 57

Draining the system 58

For draining of the system connect the drain hose 3 to the drain pan 2 as described in the ﬁgure below open the drain taps 1 and let the water ﬂow into the drain pan 2 58

For ekhvmrd 58

For ekhvmyd 58

General symptoms 58

If draining is needed connect the drain hose 2 to the drain valve 1 as described in the ﬁgure below and open the drain valve 1 58

A list of errors and corrective actions can be found in the table below 59

Error codes 59

For other error codes which may be displayed during the system test run or operation see the installation manual of the outdoor unit 59

In case this procedure for resetting the safety is not successful contact your local dealer 59

Reset the safety by pushing the button 59

When a safety device is activated the user interface led will be ﬂashing and an error code will be displayed 59

Electrical speciﬁcations multi tenant power supply 60

Electrical speciﬁcations power supply 60

Nit specifications 60

Technical speciﬁcations 60

Daikin EKHVMYD50ABV1 [7/64] Main components in the unit

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