Hitachi YUTAKI H Combi HWD-WE-220S Installation & Operation Manual Download Page 109

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109

PMML0600 rev.0 - 06/2022

YUT

AKI M R32 AND Y

AKI HYDROSPLIT R32

MAINTENANCE

8.1.2 RASM-(4-7)(V)R(W)1E

8.1.2.1 Removing the service cover

NOTE

Service cover needs to be removed for most of operations inside the outdoor unit.

Remove the 6 screws fixing the Service cover.

Remove the screw at the right side of the unit fixing the Service cover

3 Slide the service cover slightly downwards and remove it pulling it backwards.

CAUTION

Pay attention of no falling off the service cover.

Summary of Contents for YUTAKI H Combi HWD-WE-220S

Page 1: ... INSTALLATION OPERATION MANUAL YUTAKI M R32 series YUTAKI HYDROSPLIT R32 series PMML0600rev 0 06 2022 MODELS RASM 2 3 VRE RASM 4 7 V R1E RASM 4 7 V RW1E HWM WE HWD WE 220S K ...

Page 2: ...as versões em outras línguas são traduzidas do inglês Em caso de divergência entre a versão em língua inglesa e as versões traduzidas faz fé a versão em língua inglesa DA Den engelske udgave er originalen og udgaverne på andre sprog er oversat fra engelsk Hvis der forekommer uoverensstemmelser mellem den engelske og den oversatte sprogudgave vil den engelske udgave være gældende NL De Engelse vers...

Page 3: ...n limba engleză versiunile în alte limbi sunt traduse din limba engleză Dacă există vreo discrepanță între versiunile în limba engleză și versiunea tradusă prevalează versiunea în limba engleză SK Anglická verzia je pôvodná ďalšie jazyky sú preložené z angličtiny V prípade akýchkoľvek nezrovnalostí medzi anglickou a preloženou verziou bude rozhodujúca anglická verzia UK Англійська версія є оригіна...

Page 4: ...2 Contents 01 General Information 11 02 Name of parts and dimensional data 19 03 Electrical data 26 04 Working range 31 05 Drain and water piping 41 06 Electrical and control settings 64 07 Commissioning 97 08 Maintenance 104 ...

Page 5: ...ydrosplit system Indoor unit 15 1 4 Product list 16 1 4 1 Monobloc system 16 1 4 2 Hydrosplit system R32 17 1 4 3 Hydrosplit system Indoor unit 17 1 4 4 Unit Controller Accessory 18 2 Name of parts and dimensional data 19 2 1 YUTAKI M R32 20 2 1 1 RASM 2 3 VRE 20 2 1 2 RASM 4 7 V R1E 21 2 2 YUTAKI Hydrosplit R32 RASM 4 7 V WR1E 22 2 3 YUTAKI H HWM WE 23 2 4 YUTAKI H Combi HWD WE 220S 24 2 5 YUTAKI...

Page 6: ...32 4 2 1 Space heating 33 4 2 2 DHW 34 4 2 3 Swimming pool heating 35 4 2 4 Space cooling Necessary cooling kit 35 4 3 R32 Hydraulic working range 36 4 3 1 Hydraulic data 36 4 3 2 Pump performance curves 37 4 3 2 1 YUTAKI M R32 37 4 3 2 2 YUTAKI Hydrosplit R32 YUTAKI H 39 4 3 2 3 YUTAKI Hydrosplit R32 YUTAKI H Combi 40 5 Drain and water piping 41 5 1 Water Drain Discharge Connection Accessory 43 5...

Page 7: ...essary elements for DHW 50 5 5 3 Additional hydraulic optional elements For DHW 52 5 5 4 Requirements and recommendations for the hydraulic circuit 53 5 5 5 Anti freezing protection for water circuit 54 5 5 6 Glycol as anti freezing protection 54 5 5 7 Insulation 56 5 5 8 Water filling 56 5 5 9 Water quality 58 5 6 Minimum water volume description 60 5 7 Water piping 62 5 7 1 Water piping length 6...

Page 8: ... 6 2 1 7 DSW7 87 6 2 1 8 DSW301 88 6 2 1 9 DSW302 88 6 2 1 10 LED indication 89 6 2 2 Water cycle PCB 90 6 2 2 1 DSW1 90 6 2 2 2 DSW2 90 6 2 2 3 DSW3 91 6 2 2 4 DSW4 91 6 2 2 5 DSW5 93 6 2 2 6 DSW6 only if available 93 6 2 2 7 DSW7 94 6 2 2 8 DSW15 RSW2 94 6 2 2 9 DSW16 RSW1 94 6 2 2 10 DSW18 95 6 2 2 11 SSW1 95 6 2 2 12 SSW2 95 6 2 2 13 LED indication 96 7 Commissioning 97 ...

Page 9: ... M R32 and YUTAKI Hydrosplit R32 105 8 1 1 RASM 2 3 VRE 105 8 1 1 1 Removing the service cover 105 8 1 1 2 Removing the upper cover 106 8 1 1 3 Removing the front cover 107 8 1 1 4 Removing the rear cover 107 8 1 2 RASM 4 7 V R W 1E 109 8 1 2 1 Removing the service cover 109 8 1 2 2 Removing the upper cover 110 8 1 2 3 Removing the rear cover 111 8 2 YUTAKI H 112 8 2 1 Removing the indoor unit ser...

Page 10: ...eneral Index 8 3 YUTAKI H Combi 117 8 3 1 Removing the indoor unit covers 117 8 3 2 Removing indoor unit electrical box 118 8 3 3 Space heating pipes connection 119 8 3 4 DHW pipes connection 120 8 3 4 1 Drain pipes connection 120 ...

Page 11: ...4 1 3 1 Classification of the units 14 1 3 1 1 Monobloc system 14 1 3 1 2 Hydrosplit system Outdoor unit 14 1 3 1 3 Hydrosplit system Indoor unit 15 1 4 Product list 16 1 4 1 Monobloc system 16 1 4 2 Hydrosplit system R32 17 1 4 3 Hydrosplit system Indoor unit 17 1 4 4 Unit Controller Accessory 18 General Information ...

Page 12: ...in this manual 1 2 Applied Symbols During normal heat pump system design work or unit installation greater attention must be paid in certain situations requiring particular care in order to avoid damage to the unit the installation or the building or property Situations that pose a risk to the safety of those in the surrounding area or to the unit itself are clearly indicated in this manual A seri...

Page 13: ...injury or product or property damage Not taking these instructions into account could lead to minor injuries to you and others in the proximities of the unit Not taking these instructions into account could lead to unit damage In the texts following the caution symbol you can also find information on safety procedures during unit installation NOTE The text following this symbol contains informatio...

Page 14: ...ower HP 2 0 3 0 4 0 5 0 6 0 7 0 V Single phase unit 230V 50Hz Three phase unit 3N 400V 50Hz R32 refrigerant Serie 1 Made in Europe RASM X X X R 1 E 1 3 1 2 Hydrosplit system Outdoor unit YUTAKI Hydrosplit R32 RASM 4 7 V WR1E Unit type Hydrosplit system Outdoor unit Low Medium temperature Position separating hyphen fixed Compressor power HP 4 0 5 0 6 0 7 0 V Single phase unit 230V 50Hz Three phase ...

Page 15: ...Position separating hyphen fixed W Water to water Made in Europe HWM W E YUTAKI H Combi HWM WE 220S K Unit type Split system Dual water module Indoor unit Domestic hot water tank Medium Low temperature Position separating hyphen fixed Water to water DHW heat exchanger Made in Europe Position separating hyphen fixed Tank model 220 L Tank material Stainless steel K Model for UK market HWD W E 220 S ...

Page 16: ...r boiler Domestic Hot Water DHW Swimming pool application Solar combination 1 4 1 Monobloc system YUTAKI M R32 RASM 4 7 V R1E Model Power supply Remarks Picture RASM 2VRE 230V 50Hz Monobloc air to water heat pump system RASM 3VRE RASM 4VR1E RASM 5VR1E RASM 6VR1E RASM 4R1E 3N 400V 50Hz RASM 5R1E RASM 6R1E RASM 7R1E NOTE The unit controller has to be ordered separately as accessory PC ARFH2E model f...

Page 17: ...1E 230V 50Hz Hydrosplit air to water heat pump system RASM 5VRW1E RASM 6VRW1E RASM 4RW1E 3N 400V 50Hz RASM 5RW1E RASM 6RW1E RASM 7RW1E NOTE For cooling operation refer to the Cooling kit accessory 1 4 3 Hydrosplit system Indoor unit YUTAKI H Model Power supply Remarks Picture HWM WE 230V 50Hz 3N 400V 50Hz Wall mounted indoor unit for Hydrosplit air to water heat pump system ...

Page 18: ... UK market Model Power supply Remarks Picture HWD WE 220S K 230V 50Hz 3N 400V 50Hz Floor standing indoor units with integrated DHW tank UK version for Hydrosplit air to water heat pump system 1 4 4 Unit Controller Accessory Unit controller accessory is sold separately for RASM 2 7 V R 1 E units Accessory Name Picture PC ARFH2E Unit controller Wired room thermostat for YUTAKI RASM 4 7 V R1E PC ARFH...

Page 19: ...NSIONAL DATA 2 1 YUTAKI M R32 20 2 1 1 RASM 2 3 VRE 20 2 1 2 RASM 4 7 V R1E 21 2 2 YUTAKI Hydrosplit R32 RASM 4 7 V WR1E 22 2 3 YUTAKI H HWM WE 23 2 4 YUTAKI H Combi HWD WE 220S 24 2 5 YUTAKI H Combi HWD WE 220S K 25 Name of parts and dimensional data ...

Page 20: ... G 1 12 Water inlet G1 13 Water strainer 14 Air purger 15 Stop valve for gas line Ø15 88 5 8 16 Stop valve for liquid line 2HP Ø6 35 1 4 3HP Ø9 52 3 8 17 Safety valve 18 Expansion vessel 6L 19 Switch for DHW emergen cy operation 20 Pressure switch for control Psc 21 Ambient thermistor 22 Liquid temperature ther mistor 23 Liquid temperature ther mistor 24 Refrigerant liquid pipe thermistor 25 Refri...

Page 21: ...16 Water inlet 1 1 4 17 Water strainer 18 Refrigerant strainer x5 19 Stop valve for gas line Ø15 88 5 8 20 Stop valve for liquid line Ø9 52 3 8 21 Safety valve 22 Expansion vessel 23 Switch for DHW emergency operation 24 Sensor for refrigerant pressure Pd 25 Sensor for refrigerant pressure Ps 26 Ambient thermistor 27 Evaporation thermistor 28 Liquid refrigerant pipe in heating thermistor 29 Gas re...

Page 22: ...SVE 12 Accumulator 13 High pressure switch PSH 14 Water Outlet 1 1 4 15 Water inlet 1 1 4 16 Refrigerant strainer x5 17 Stop valve for gas line Ø15 88 5 8 18 Stop valve for liquid line Ø9 52 3 8 19 Sensor for refrigerant pressure Pd 20 Sensor for refrigerant pressure Ps 21 Ambient thermistor 22 Evaporation thermistor 23 Liquid refrigerant pipe in heating thermistor 24 Gas refrigerant pipe thermist...

Page 23: ... purger 6 Water pressure sensor 7 Safety valve 8 Drain pipe for safety valve 9 Manometer 10 Unit controller 11 Electrical box 12 Switch for DHW emergency oper ation 13 Water inlet pipe connection G 1 1 4 female 14 Water outlet pipe connection G 1 1 4 female 15 Thermistor Water inlet pipe 16 Thermistor Water outlet pipe Wall support dimensions View from A Water NOTE Water flow direction ...

Page 24: ...ontroller 13 Manometer 14 DHW tank 220 L 15 DHW tank heater thermostat 16 Mounting foot x4 17 Water inlet connection G1 female 18 Water outlet connection G1 female 19 DHW inlet connection G3 4 male 20 DHW outlet connection G3 4 male 21 Water HP inlet connection G1 female 22 Water HP outlet connection G1 female 23 Drain port for DHW G3 8 24 Shutdown valve factory sup plied accessory 25 Tank insulat...

Page 25: ...anometer 14 DHW tank 220 L 15 DHW tank heater thermostat 16 Mounting foot x4 17 Water inlet connection G1 female 18 Water outlet connection G1 female 19 DHW inlet connection G3 4 male 20 DHW outlet connection G3 4 male 21 Water HP inlet connection G1 female 22 Water HP outlet connection G1 female 23 Drain port for DHW G3 8 24 Shutdown valve factory supplied accessory 25 Tank insulation 26 DHW ther...

Page 26: ...nsiderations 27 3 1 1 Monobloc system 28 3 1 2 Hydrosplit system Outdoor unit 29 3 1 2 1 RAS 4 7 V WR1E in combination with YUTAKI H YUTAKI H Combi 29 3 1 3 Hydrosplit system Indoor unit 29 3 1 3 1 YUTAKI H 29 3 1 3 2 YUTAKI H Combi 30 Electrical data ...

Page 27: ...d The Maximum current shown in the above table is the maximum total unit running current at the following conditions Supply voltage 90 of the rated voltage Unit capacity 100 at maximum operating conditions The power supply cables must be sized to cover this maximum current value Specifications in these tables are subject to change without notice in order that HITACHI may bring the latest innovatio...

Page 28: ...C A IPT KW RASM 4VR1E 230V 50Hz 253 207 Without DHW tank heater 14 3 3 26 10 4 2 36 28 8 5 98 With DHW tank heater 10 2 2 18 20 6 4 40 41 3 8 81 RASM 5VR1E Without DHW tank heater 16 0 3 65 11 7 2 67 28 8 5 98 With DHW tank heater 10 2 2 18 20 6 4 40 41 3 8 81 RASM 6VR1E Without DHW tank heater 17 7 4 04 12 7 2 89 28 8 5 98 With DHW tank heater 10 2 2 18 20 6 4 40 41 3 8 81 RASM 4R1E 3N 400V 50Hz ...

Page 29: ...2 89 16 0 9 10 RASM 7RW1E 7 2 4 46 5 8 3 62 16 0 9 10 3 1 3 Hydrosplit system Indoor unit 3 1 3 1 YUTAKI H HWM WE Model Power supply Applicable voltage Operation mode RNC A IPT kW MC A Max IPT kW U max V U min V HWM WE 230V 50Hz 253 207 Without electric heater 1 4 0 18 1 47 0 18 With electric heater 27 6 6 18 27 6 6 18 With DHW tank heater 14 5 3 18 14 5 3 18 With DHW tank heater and electric heat...

Page 30: ...30V 50Hz 253 207 Without electric heater 1 4 0 18 1 47 0 18 With electric heater 27 6 6 18 27 6 6 18 With DHW tank heater 13 4 2 93 13 4 2 93 With DHW tank heater and electric heaters 39 5 8 93 39 5 8 93 3N 400V 50Hz 440 360 Without electric heater 1 4 0 18 1 47 0 18 With electric heater 17 4 6 18 18 9 6 18 With DHW tank heater 13 4 2 93 13 4 2 93 With DHW tank heater and electric heaters 17 4 8 9...

Page 31: ...e heating 33 4 2 2 DHW 34 4 2 3 Swimming pool heating 35 4 2 4 Space cooling Necessary cooling kit 35 4 3 R32 Hydraulic working range 36 4 3 1 Hydraulic data 36 4 3 2 Pump performance curves 37 4 3 2 1 YUTAKI M R32 37 4 3 2 2 YUTAKI Hydrosplit R32 YUTAKI H 39 4 3 2 3 YUTAKI Hydrosplit R32 YUTAKI H Combi 40 Working range ...

Page 32: ...110 of the nominal voltage Voltage imbalance for nominal power supply 3N 400V 50Hz Up to 3 of each phase measured at the main terminal of the outdoor unit Starting voltage Always higher than 85 of the nominal voltage Relative humidity limit Lower than 80 4 2 Temperature working range MODEL 4 0HP 5 0HP 6 0HP 7 0HP Water temperature ºC Refer to the graphics for each case Indoor ambient temperature 5...

Page 33: ...0 45 50 60 30 20 25 10 0 10 5 20 25 30 Outlet water temperature ºC Ambient temperature ºC RASM 4 7 V R W 1E Continuous working range Heat pump operation possible Start up Starting only back up heater operation Only for YUTAKI Hydrosplit models 0 10 20 30 40 52 29 55 50 60 30 20 25 10 0 10 20 25 30 Outlet water temperature ºC Ambient temperature ºC ...

Page 34: ...0 40 50 35 5 Tank temperature ºC Ambient temperature ºC NOTE Area marked with only available if DHW tank back up heater is enabled RASM 4 7 V R W 1E Continuous working range Tank heater 25 35 45 55 65 75 30 20 10 0 10 20 30 40 50 35 25 47 30 Tank temperature ºC Ambient temperature ºC NOTE Area marked with only available if DHW tank back up heater is enabled ...

Page 35: ...mbient temperature ºC RASM 4 7 V R W 1E Continuous working range Heat pump operation possible 15 20 25 30 35 40 30 20 10 0 10 20 30 40 24 33 25 35 Outlet water temperature ºC Ambient temperature ºC 4 2 4 Space cooling Necessary cooling kit Continuous working range 0 5 10 15 20 25 5 15 25 35 45 55 46 30 10 16 22 Outlet water temperature ºC Ambient temperature ºC Fan coil working area Refreshing flo...

Page 36: ...mum allowable water pressure MPa 0 1 Maximum allowable water pressure MPa 0 3 YUTAKI Hydrosplit R32 MODEL 4 0 HP 5 0 HP 6 0 HP 7 0 HP Minimum water flow rate 1 m3 h 1 0 1 1 1 2 1 2 Maximum water flow rate 1 m3 h 2 8 3 0 3 0 3 0 Minimum installation water volume 2 l 50 55 55 65 Minimum allowable water pressure MPa 0 1 Maximum allowable water pressure MPa 0 3 NOTE 1 Values calculated based on the fo...

Page 37: ... to operate the pump within the minimum and maximum water flow 4 3 2 1 YUTAKI M R32 2 0 HP 3 0 HP Static pressure mwc 0 1 2 3 4 5 6 7 8 0 0 5 1 1 5 2 2 5 3 3 5 Static pressure mwc 0 1 2 3 4 5 6 7 8 0 0 5 1 1 5 2 2 5 3 3 5 Water flow m3 h Water flow m3 h 4 0 HP 5 0 HP Static pressure mwc 0 1 2 3 4 5 6 7 8 0 0 5 1 1 5 2 2 5 3 3 5 Static pressure mwc 0 1 2 3 4 5 6 7 8 0 0 5 1 1 5 2 2 5 3 3 5 Water fl...

Page 38: ...6 2022 4 R32 HYDRAULIC WORKING RANGE WORKING RANGE 6 0 HP 7 0 HP Static pressure mwc 0 1 2 3 4 5 6 7 8 0 0 5 1 1 5 2 2 5 3 3 5 Static pressure mwc 0 1 2 3 4 5 6 7 8 0 0 5 1 1 5 2 2 5 3 3 5 Water flow m3 h Water flow m3 h ...

Page 39: ...field installation 4 0 HP 5 0 HP Static pressure mwc 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 Static pressure mwc 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 Water flow m3 h Water flow m3 h 6 0 HP 7 0 HP Static pressure mwc 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 Static pressure mwc 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 0 0 5 1 1 5...

Page 40: ...he field installation 4 0 HP 5 0 HP Static pressure mwc 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 Static pressure mwc 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 Water flow m3 h Water flow m3 h 6 0 HP 7 0 HP Static pressure mwc 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 Static pressure mwc 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 0 0 5 1 ...

Page 41: ...for YUTAKI M 46 5 4 2 Hydraulic Connections for YUTAKI HYDROSPLIT and YUTAKI H 46 5 4 3 Hydraulic Connections for YUTAKI HYDROSPLIT and YUTAKI H Combi 47 5 4 4 Parts name list 47 5 5 Space heating and DHW for YUTAKI M YUTAKI Hydrosplit 49 5 5 1 Additional hydraulic necessary elements for space heating 49 5 5 2 Additional hydraulic necessary elements for DHW 50 5 5 3 Additional hydraulic optional e...

Page 42: ... 6 Glycol as anti freezing protection 54 5 5 7 Insulation 56 5 5 8 Water filling 56 5 5 9 Water quality 58 5 6 Minimum water volume description 60 5 7 Water piping 62 5 7 1 Water piping length 62 5 7 2 Water piping size 62 5 8 Suspension of water piping 63 ...

Page 43: ...into the drain boss up to the extruded portions 2 Insert the boss into the unit base up to the extruded portions 3 Size of the drain boss is RASM 2 3 VRE Ø15 mm O D RASM 4 7 V R W 1E Ø32 mm O D 4 A drain pipe should be field supplied NOTE Do not use this drain boss set in a cold area because the drain water may freeze This drain boss is not sufficient to collect all the drain water If collecting d...

Page 44: ...off valve installed at the water inlet connection field supplied 3 Connect a pipe or a drain hose to the drain port field supplied placed in the water outlet pipe of the unit 4 Open manually the drain port of the shut off valve field supplied and collect the water into a bucket or to a sewage system 5 Once all the water has been drained and all maintenance operations have been finished close again...

Page 45: ...r could be hot and could keep in pressure Perform the draining procedure carefully Draining of the DHW circuit 1 Switch OFF the main power supply of the indoor unit 2 Close the main DHW inlet valve water inlet shut off valve in order to avoid the tank filling 3 Open the shut off valve of the DHW outlet to allow draining without creating a vacuum Ensure that valve at the highest level of the DHW sy...

Page 46: ...0600 rev 0 06 2022 5 YUTAKI HYDRAULIC CONNECTIONS DRAIN AND WATER PIPING 5 4 YUTAKI Hydraulic Connections 5 4 1 Hydraulic Connections for YUTAKI M 5 4 2 Hydraulic Connections for YUTAKI HYDROSPLIT and YUTAKI H ...

Page 47: ...ing connections Hydrosplit water inlet D Piping connections Hydrosplit water oulet E Piping connections DHW coil inlet F Piping connections DHW coil outlet G Piping connections Water inlet DHW H Piping connections Water outlet DHW J Piping connections Water inlet Space Heating Cooling K Piping connections Water outlet Space Heating Cooling 1 Field supplied Shut off valve 2 Field supplied Shut off ...

Page 48: ...off valve 14 Field supplied Shut off valve 15 Field supplied Shut off valve 16 Field supplied Shut off valve 17 Accessories 3 way valve ATW 3WV 01 accessory 18 Unit supplied Shut off valve 19 Unit supplied Shut off valve 20 Field supplied Buffer tank 21 Field supplied Water strainer 22 Field supplied Expansion vessel 23 Unit supplied Shut off valve 24 Unit supplied Shut off valve 25 Unit supplied ...

Page 49: ...e space heating circuit and DHW circuit if it were the case with water and checking water pressure and the total absence of any water leakage 5 5 1 Additional hydraulic necessary elements for space heating Nature Nº Part name Piping connections 1 Water inlet Space heating 2 Water outlet Space heating Field supplied 3 Shut off valve field supplied Accessories 4 Water check valve ATW WCV 01 accessor...

Page 50: ...º Part name Piping connections 1 Water inlet Space heating 2 Water outlet Space heating 3 Heating coil inlet 4 Heating coil outlet 5 Water inlet DHW 6 Water outlet DHW Field supplied 7 Shut off valve field supplied Accessories 8 Domestic hot water tank DHWT 200 300 S 3 0H2E accessory 9 3 way valve ATW 3WV 01 accessory Field supplied 10 T branch 11 Heating coil pipes ...

Page 51: ...PIPING Additionally the following elements are required for the DHW circuit Nature Nº Part name Piping connections 1 Water inlet DHW 2 Water outlet DHW Field supplied 3 Pressure and temperature relief valve 3a Shut off valve 3b Water check valve 3c Pressure relief valve 4 Shut off valve 5 Draining ...

Page 52: ...ATER PIPING 5 5 3 Additional hydraulic optional elements For DHW In case of a recirculation circuit for the DHW circuit Nature Nº Part name Piping connections 1 Water inlet DHW 2 Water outlet DHW Accessories 3 Water check valve ATW WCV 01 accessory Field supplied 4 Water pump 5 Shut down valve ...

Page 53: ...ecommended to be installed on the space heating field installation in order to remove possible particles remaining from brazing which cannot be removed by the unit water strainer In case of YUTAKI Hydrosplit in combination with YUTAKI H it is mandatory to install additional water strainer into YUTAKI Hydrosplit outdoor unit water inlet connection When selecting a tank for DHW operation take into c...

Page 54: ...ontrol In case of a power supply failure functions above cannot guarantee protection allowing freezing and possible breakage of pipes and or components Due to that an anti freezing system independent of power supply is required Adding glycol into the water circuit to lower the freezing point of water Adding anti freeze valves field supplied CAUTION Both methods cannot be used simultaneously since ...

Page 55: ...5 20 15 10 5 0 0 10 20 30 40 50 60 70 Frost protection Volume etylene glycol coolant Temperature ºC Burst point acc to DIN51583 Frost protection Freezing point acc to ASTM D1177 NOTE Freezing point according to ASTM D 1177 is the temperature for the first ice crystal formation The requirements of table must be always compared with glycol manufacturer specifications Maximum concentration of glycol ...

Page 56: ...o can be found on Technical Catalogue 5 5 7 Insulation Water circuit piping must be insulated to prevent condensation and to reduce heat loss For outdoor water piping recommended insulation thickness depends on piping length Recommended thickness values for an insulation of ʎ 0 039W mK are shown in table below Piping length mm Minimum insulation thickness mm 20 19 20 30 32 30 40 40 40 50 50 5 5 8 ...

Page 57: ...stallation has been removed a reduction of water pressure in the circuit is very likely to occur Therefore additional water should be filled until water pressure returns to an approximate level of 1 8 bar NOTE The unit is equipped with a manual air purger factory supplied at the highest location of the unit Anyway if there are higher points in the water installation air might be trapped inside wat...

Page 58: ... of CaCO3 Before water filling sludge removal for existing water networks cleansing and rinsing for an existing or new installations water networks it is important to cleanse all hydraulic pipes to remove sludge and scale by using a specific designed product for cleaning central heating systems Also its recommended to use a product inhibitor for protecting central heating systems against limescale...

Page 59: ...ult of calculating the Langelier Index should be between 0 5 In installation locations where the result of Langelier Index calculation are out of the expected value with a tendency to corrosive water it is recommended to install the active anode accessory ATW CP 05 only available for YUTAKI H Combi version In the regions where the water is very hard or out of requirements values or where the resul...

Page 60: ...ting ΔT Permissible water temperature drop ºC Drop in the delivery water temperature that the client is willing to allow in the installation QDEF Heat loss during defrosting kW Heat loss caused in the system by reducing the delivery water temperature which may affect the user s comfort level of warmth This value is the sum of the two following items QI Heat demand from the installation kW While de...

Page 61: ...he minimum water volume needed in each unit 11 12 13 16 Water temperature drop Volume L 5ºC 350 382 414 510 10ºC 175 191 207 255 15ºC 117 127 138 170 20ºC 88 96 104 127 25ºC 70 76 83 102 30 ºC 58 64 69 85 NOTE The values shown on the table are based on theoretical installation conditions In addition YUTAKI units admits several hydraulic circuits configurations and the value can be different depend...

Page 62: ...ping length between 3 way valve and DHW tank 10 m Minimum water piping length between YUTAKI Hydrosplit and YUTAKI H or YUTAKI H Combi 5 m 5 m Item YUTAKI M R32 Maximum water piping length between indoor unit and DHW tank 10 m Maximum water piping length between 3 way valve and DHW tank 10 m Maximum total piping combination 10 m 5 7 2 Water piping size Piping location The unit is factory supplied ...

Page 63: ...HP G 1 1 4 female G 1 1 4 female G 1 1 4 male G 1 1 4 male 7 0 HP G 1 1 4 female G 1 1 4 female G 1 1 4 male G 1 1 4 male 5 8 Suspension of water piping Suspend the water piping at certain points and prevent the water piping from being in direct contact with the building walls ceilings etc If there is direct contact between pipes abnormal sound may occur due to the vibration of the piping Pay spec...

Page 64: ... RSW switches 80 6 2 1 Refrigerant cycle PCB 83 6 2 1 1 DSW1 83 6 2 1 2 DSW2 84 6 2 1 3 DSW3 85 6 2 1 4 DSW4 RSW1 86 6 2 1 5 DSW5 86 6 2 1 6 DSW6 87 6 2 1 7 DSW7 87 6 2 1 8 DSW301 88 6 2 1 9 DSW302 88 6 2 1 10 LED indication 89 6 2 2 Water cycle PCB 90 6 2 2 1 DSW1 90 6 2 2 2 DSW2 90 6 2 2 3 DSW3 91 6 2 2 4 DSW4 91 6 2 2 5 DSW5 93 6 2 2 6 DSW6 only if available 93 6 2 2 7 DSW7 94 6 2 2 8 DSW15 RSW...

Page 65: ...65 PMML0600 rev 0 06 2022 6 ELECTRICAL AND CONTROL SETTINGS 6 2 2 9 DSW16 RSW1 94 6 2 2 10 DSW18 95 6 2 2 11 SSW1 95 6 2 2 12 SSW2 95 6 2 2 13 LED indication 96 ...

Page 66: ...emperature control and should be positioned after the hydraulic separator buffer tank or boiler combination 9 Common thermistor Common terminal for thermistors 10 Thermistor for swimming pool water temperature The sensor is used for the swimming pool temperature control and should be positioned inside plate heat exchanger of the swimming pool 11 Thermistor for second ambient temperature The sensor...

Page 67: ... Water Pump 2 WP2 When there is a second temperature application a secondary pump is the circulating pump for the secondary heating circuit 28 Auxiliary power Power supply for ATW RTU and central device 29 30 N Electrical Heater DHW Output If DHW tank contains an electric heater the air to water heat pump can activate it if the heat pump cannot achieve the required DHW temperature by itself 31 L 3...

Page 68: ...plate heat exchanger of the swimming pool 11 Thermistor for second ambient temperature The sensor is used for the second ambient temperature control and it should be positioned outdoors 12 Earth Earth connection for the 3 way valve and water pump 13 Common line Terminal Line common for input 1 and input 2 14 Input 1 Demand ON OFF The air to water heat pump system has been designed to allow the con...

Page 69: ...ing circuit 28 Auxiliary power Power supply for ATW RTU and central device 29 30 N Electrical Heater DHW Output If DHW tank contains an electric heater the air to water heat pump can activate it if the heat pump cannot achieve the required DHW temperature by itself 31 L 32 Output 9 33 L Line Line terminal for valve accessories 34 N Common line Terminal line common for outputs 1 2 and 9 35 C Output...

Page 70: ...table board as shown in the next picture 1 2 1 2 H LINK ATW RTU L N 28 29 AUXILIARY POWER ATW RTU CENTRAL DEVICE Optional wireless ON OFF room thermostat ATW RTU 04 The heat pump system has been designed to allow the connection of a remote ON OFF thermostat to effectively control the home temperature Depending on the room temperature the thermostat will turn the system to ON or OFF a If no thermos...

Page 71: ...cuits Circuit 1 and Circuit 2 and a different Demand ON OFF is used for each of them please refer to 6 1 2 Input terminals Default input functions section in this chapter Auxiliary power supply is available for thermostats and central devices 28 and 29 terminals of TB2 Unit controller connection In those cases where the unit controller is ordered as a required accessory or those cases where anothe...

Page 72: ...thermistor must be installed to control the water temperature The connection for this thermistor must be done between terminals 5 and 6 of the TB2 Not available for HWD WE 220S K 6 5 TDHWT DHWT RASM 2 7 V R W 1 E HWM WE Water outlet thermistor for circuit 2 TWO2 When the installation is configured with a second circuit the thermistor for the water outlet temperature have to be connected between te...

Page 73: ... heat exchanger of the swimming pool and have to be connected between terminals 9 and 10 of the terminal board 2 10 9 TSWP AuxSensor2 Second ambient temperature thermistor TAMB2 To control the second ambient temperature The thermistor should be positioned outdoors and have to be connected between terminals 9 and 11 of the terminal board 2 11 9 TAMB2 AuxSensor3 ECO Default for input 2 When enabled ...

Page 74: ...between the heat pump and the corresponding sensor must be done on terminals 16 and 17 at the Terminal board input 4 16 17 Common Line SWPIN Input 3 Solar Default for input 4 This input comes from a solar panel sensor The solar combination by input demand allows HSW to be heated by solar system when there is enough solar energy available The connection of this input signal has to be done between t...

Page 75: ...ows a request for a one time heating up of the domestic hot water temperature The input can be sent by a push button a NC contact and a NO contact This input is switched on terminals 16 and 20 of the TB2 Common Line DHW Boost input 6 16 20 Power Meter Default for input 7 This function is used to monitor real consumption of the system by means an external power meter device connected at this input ...

Page 76: ...d In case of setting an installation with Aquastat remove the jumper between terminals 22 and 23 of the Terminal board 2 and connect the Aquastat as shown in the following picture 22 23 Jumper 22 23 C Second Aquastat 1 Circuit 1 for WP Output terminals Default output functions Mixing valve for Circuit 2 The mixing valve is controlled to maintain the second heating temperature at the second heating...

Page 77: ...onsumption of the water pump Electrical heater DHWT output In those cases where a DHW tank is installed with an electrical heater the Air to Water heat pump can activate the electric heater of the tank when the heat pump cannot achieve the required DHW temperature by itself N 31 Electrical Heater DHWT EH4 L 30 3kW CAUTION When using a DHW tank other than those from Hitachi the maximum connectable ...

Page 78: ...ol Default for Output 1 YUTAKI units can be used to heat the water of a swimming pool The signal is used on a 3 way motorized diverting valve and to provide control of supply water flow for the swimming pool This output is available when the function is enabled from the Unit controller Using the appropriate wiring connect the valve cables as shown in the previous picture N M L 33 C Brown Black Blu...

Page 79: ... the require temperature by itself Auxiliary Heat Output 3 37 38 Solar Default for output 4 This output is used when solar mode is enabled from Unit controller and the temperature in the solar panel rises above the water temperature in the domestic hot water tank DHWT The connection between terminals 39 and 40 shall be closed in order to activate the dedicated water pump for solar panel combinatio...

Page 80: ...ot be changed A malfunction might occur if changed CAUTION Before setting DIP switches first turn the power supply OFF and then set the position of DIP switches If the switches are set without turning the power supply OFF the contents of the setting are invalid The PCB in the outdoor unit is operating with DIP switches and push switches The location is as follows YUTAKI M RASM 2 3 VRE 230V 50Hz LE...

Page 81: ... DIP SWITCHES AND RSW SWITCHES ELECTRICAL AND CONTROL SETTINGS YUTAKI M YUTAKI Hydrosplit R32 RASM 4 6 VR W 1E 230V 50Hz Refrigerant cycle Water cycle YUTAKI M YUTAKI Hydrosplit R32 RASM 4 7 R W 1E 3N 400V 50Hz Refrigerant cycle Water cycle ...

Page 82: ...82 PMML0600 rev 0 06 2022 6 SETTING OF DIP SWITCHES AND RSW SWITCHES ELECTRICAL AND CONTROL SETTINGS YUTAKI H H Combi HWM WE HWD WE 220S K Water cycle ...

Page 83: ...M 2 3 VRE RASM 4 6 VR W 1E RASM 4 7 R W 1E Factory setting 2 1 3 2 1 4 3 2 1 When set pin to ON the electric current detection is cancelled Pin should be set back to OFF after electrical work 2 1 3 2 1 Not applicable Test run mode RASM 4 6 VR W 1E PCB2 RASM 4 7 R W 1E PCB1 DSW1 RASM 4 7 V R W 1E Factory setting 4 3 2 1 Test run for pump down 4 3 2 1 Not available 4 3 2 1 Not available 4 3 2 1 Not ...

Page 84: ...ard for compressor protection will be effective Test run will start within 20 seconds after setting DSW1 pin 1 to ON position 6 2 1 2 DSW2 Optional Function setting RASM 2 3 VRE PCB1 RASM 4 6 VR W 1E PCB2 RASM 4 7 R W 1E PCB1 DSW2 RASM 2 3 VRE RASM 4 7 V R W 1E Factory setting 6 5 4 3 2 1 6 5 4 3 2 1 Function selection setting mode 6 5 4 3 2 1 6 5 4 3 2 1 External input output setting mode 6 5 4 3...

Page 85: ...RASM 4 6 VR W 1E PCB2 RASM 4 7 R W 1E PCB1 DSW3 Factory setting RASM 2VRE 6 5 4 3 2 1 RASM 3VRE 6 5 4 3 2 1 RASM 4VR W 1E 6 5 4 3 2 1 RASM 5VR W 1E 6 5 4 3 2 1 RASM 6VR W 1E 6 5 4 3 2 1 RASM 4R W 1E 6 5 4 3 2 1 RASM 5R W 1E 6 5 4 3 2 1 RASM 6R W 1E 6 5 4 3 2 1 RASM 7R W 1E 6 5 4 3 2 1 NOTE For RASM 7R W 1E DSW6 must be configured to PIN 1 ON factory setting do not change ...

Page 86: ...lection No setting is required RASM 2 3 VRE PCB1 RASM 4 6 VR W 1E PCB2 RASM 4 7 R W 1E PCB1 DSW4 RSW1 RASM 2 7 V R W 1 E Factory setting 6 2 1 5 DSW5 Terminal resistance RASM 2 3 VRE PCB1 RASM 4 6 VR W 1E PCB1 RASM 4 7 R W 1E PCB1 DSW5 RASM 2 3 VRE RASM 4 6 VR W 1E RASM 4 7 R W 1E Factory setting Fuse recovery Not applicable Not applicable ...

Page 87: ...3 VRE PCB1 RASM 4 6 VR W 1E PCB2 RASM 4 7 R W 1E PCB1 DSW6 RASM 2 3 VRE RASM 4 6 V R W 1E RASM 7R W 1E Factory setting 3 2 1 3 2 1 6 2 1 7 DSW7 Function selection RASM 2 3 VRE PCB1 RASM 4 6 VR W 1E PCB2 RASM 4 7 R W 1E PCB1 DSW7 RASM 2 3 VRE RASM 4 7 V R W 1E Factory setting Open valves when DSW1 for test run pin 4 is switched ON Not applicable ...

Page 88: ...Not available 4 3 2 1 Forced stoppage of compressor 4 3 2 1 NOTE This operation is reset once the compressor is in Thermo ON mode During the test run operation the units will operate continuously during 2 hours without Thermo OFF and the 3 minute guard for compressor protection will be effective Test run will start within 20 seconds after setting DSW1 pin 1 to ON position 6 2 1 9 DSW302 Optional F...

Page 89: ...ion LED4 Yellow Not used LED351 Red For inspection LED353 Red For inspection PCB2 LD1 Red For inspection LD2 Red For inspection LD3 Red For inspection LD4 Red For inspection RASM 4 7 V R W 1E Name Colour Indication LED1 Red This LED indicates the transmission status between the indoor unit and the unit controller LED2 Yellow This LED indicates the transmission status between the indoor unit and th...

Page 90: ...1 4 3 2 1 NOTE In case of installing the Cooling kit accessory set the pin 4 of DSW1 to ON in order to enable the cooling operation 6 2 2 2 DSW2 Unit capacity setting DSW2 Factory setting Setting required in HWM WE and HWD WE 220S K for combination HWM WE HWD WE 220S K 4 3 2 1 4 3 2 1 with RASM 4 V RW1E 4 3 2 1 with RASM 5 V RW1E 4 3 2 1 with RASM 6 V RW1E 4 3 2 1 with RASM 7RW1E RASM 2VRE 4 3 2 1...

Page 91: ...icable RASM 6 V R W 1E 4 3 2 1 Not applicable RASM 7R W 1E 4 3 2 1 Not applicable 6 2 2 3 DSW3 Additional setting 1 DSW3 RASM VR 1 E RASM R1E RASM V RW1E HWM WE HWD WE 220S K Factory setting 4 3 2 1 4 3 2 1 4 3 2 1 4 3 2 1 1 step heater for 3 phase unit option Not applicable 4 3 2 1 Not applicable 4 3 2 1 6 2 2 4 DSW4 Additional setting 2 DSW4 RASM V R 1 E RASM V RW1E HWM WE HWD WE 220S K Factory ...

Page 92: ...gency mode 8 7 6 5 4 3 2 1 Not applicable 8 7 6 5 4 3 2 1 DHW tank s heater operation 8 7 6 5 4 3 2 1 Not applicable 8 7 6 5 4 3 2 1 DHW 3 way valve forced ON 8 7 6 5 4 3 2 1 Not applicable 8 7 6 5 4 3 2 1 Mirror function YUTAKI Mirror 8 7 6 5 4 3 2 1 Not applicable Not applicable CAUTION Never turn all DSW4 DIP switch pins ON If this happens the software of the unit will be removed Never activate...

Page 93: ... for circuit 1 Auxiliary sensor for circuit 2 Not applicable 4 3 2 1 Auxiliary sensor for circuit 1 Outdoor unit sensor for circuit 2 Not applicable 4 3 2 1 Auxiliary sensor instead of outdoor unit sensor for both circuits Not applicable 4 3 2 1 Use the maximum temperature value between Two3 boiler heater thermistor and Two water outlet thermistor for water control Not applicable 4 3 2 1 6 2 2 6 D...

Page 94: ...04 When cooling mode operation is needed Not applicable 4 3 2 1 6 2 2 8 DSW15 RSW2 Refrigerant cycle address DSW15 RSW2 RASM V R W 1 E HWM WE HWD WE 220S K Factory setting 6 5 4 3 2 1 Refrigerant cycle address setting Required only when YUTAKI Cascade Controller is installed Example of system setting with a value of 5 6 5 4 3 2 1 6 2 2 9 DSW16 RSW1 Not used DSW16 RSW1 RASM V R W 1 E HWM WE HWD WE ...

Page 95: ...ote Local Not available Not available NOTE For YUTAKI M units RASM V R 1 E using a Mirror box accessory SWW1 must be changed to Local For YUTAKI M units RASM V R 1 E When DSW4 1 is OFF and it is not required any combination with Mirror box accessory set SSW1 to Local in order to operate without Remote Controller 6 2 2 12 SSW2 Heat Cool SSW2 RASM V R W 1 E HWM WE HWD WE 220S K Factory setting Heat ...

Page 96: ...GS 6 2 2 13 LED indication Name Colour Indication LED1 Green Power indication LED2 Red Power indication LED3 Red Heat pump operation thermo ON OFF LED4 Yellow Alarm flickering with 1 sec interval LED5 Green Not used LED6 Yellow H Link transmission LED7 Yellow H Link transmission for unit controller ...

Page 97: ...reliminary check 98 7 2 1 Checking the unit 98 7 2 2 Electrical checking 98 7 2 3 Hydraulic circuit checking space heating and DHW 99 7 2 4 Checking the refrigerant circuit 99 7 2 5 Test and check 100 7 3 Commissioning procedure 100 7 4 Test run air purge 101 Commissioning ...

Page 98: ...t the electrical wiring and the piping are correctly connected YUTAKI M YUTAKI Hydrosplit units must be configured by the installer to get the perfect setting and the unit working 7 2 1 Checking the unit Check external appearance of the unit to look for any damage due to transportation or instal lation Check that all the covers are totally closed Check that the recommended service space is respect...

Page 99: ... Make sure the system s internal water volume is correct Check that the hydraulic circuit s valves are fully open Check to see that additional water pumps WP2 or and WP3 are correctly connected to termi nal board CAUTION Operating the system with closed valves will damage the unit Check to see that air purge valve is open and that the hydraulic circuit is air purged The installer is responsible of...

Page 100: ...n troller configuration have been carried out close the electrical box and place the cabinet as shown in the manual Make the start up wizard configuration in the user controller Make a test run as shown in item 7 4 Test run air purge After test run is completed start the entire unit or the selected circuit by pressing the OK but ton Initial start up at low outdoor ambient temperatures During commi...

Page 101: ... not performed and heating is performed by Heat Pump HITACHI is not responsible for its operation CAUTION It is recommended start the unit first power ON with heater forced OFF and compressor forced OFF See 6 2 Setting of DIP switches and RSW switches In order to circulate water by water pump and remove possible air into the heater Check heater completely filled 7 4 Test run air purge Test run is ...

Page 102: ...NG This menu shows the following test to be launched Unit Test Run Air Purge Screed Drying Pump down procedure After Test Run Air Purge or Pump down procedure option is selected the YUTAKI user con troller asks for the duration of the test Example for PC ARFH2E ...

Page 103: ...icon is shown in the notifications zone but the notification of this test run is taken from H LINK When test run has finished an information message is displayed in the screen and pressing accept the user returns to the global view NOTE When commissioning and installing the unit it is very important to use the Air purge function to remove all the air in the water circuit When the air purge functio...

Page 104: ...er 109 8 1 2 2 Removing the upper cover 110 8 1 2 3 Removing the rear cover 111 8 2 YUTAKI H 112 8 2 1 Removing the indoor unit service cover 112 8 2 2 Removing indoor unit electrical box 113 8 2 3 Space heating pipes connection 114 8 2 3 1 Drain pipes connection 114 8 2 4 Cover assembly 115 8 3 YUTAKI H Combi 117 8 3 1 Removing the indoor unit covers 117 8 3 2 Removing indoor unit electrical box ...

Page 105: ...e cover NOTE Service cover needs to be removed for most of operations inside the outdoor unit 1 Remove the upper cover as explained in 8 1 1 2 Removing the upper cover 2 Remove the 6 screws fixing the Service cover 1 1 Service cover 3 Slide the service cover slightly downwards and remove it pulling it backwards CAUTION Pay attention of no falling off the service cover ...

Page 106: ...M R32 AND YUTAKI HYDROSPLIT R32 MAINTENANCE 8 1 1 2 Removing the upper cover 1 Remove the 7 screws fixing the Upper cover 1 1 Upper cover 2 Pull the Upper cover upwards and remove it CAUTION Pay attention of no falling off the upper cover ...

Page 107: ... cover 2 Remove the service cover as explained in 8 1 1 1 Removing the service cover 3 To remove the front cover remove 7 fixing screws and 3 left nails 1 2 1 Front cover 2 Nails CAUTION Pay attention of no falling off the front cover 8 1 1 4 Removing the rear cover 1 Remove the 8 screws fixing the rear cover 2 screws at the right side and 6 screws at the rea side 1 1 Rear cover ...

Page 108: ...MML0600 rev 0 06 2022 8 YUTAKI M R32 AND YUTAKI HYDROSPLIT R32 MAINTENANCE 2 Slide the Rear cover slightly downwards and remove it pulling it backwards CAUTION Pay attention of no falling off the rear cover ...

Page 109: ...TE Service cover needs to be removed for most of operations inside the outdoor unit 1 Remove the 6 screws fixing the Service cover 2 Remove the screw at the right side of the unit fixing the Service cover 3 Slide the service cover slightly downwards and remove it pulling it backwards CAUTION Pay attention of no falling off the service cover ...

Page 110: ...YUTAKI M R32 AND YUTAKI HYDROSPLIT R32 MAINTENANCE 8 1 2 2 Removing the upper cover 1 Remove the 13 screws fixing the upper cover 2 Pull the upper cover upwards and remove it CAUTION Pay attention of no falling off the upper cover ...

Page 111: ...ND YUTAKI HYDROSPLIT R32 MAINTENANCE 8 1 2 3 Removing the rear cover 1 Remove the 11 screws fixing the rear cover 2 Slide the Rear cover slightly downwards and remove it pulling it backwards CAUTION Pay attention of no falling off the Rear cover ...

Page 112: ... unit service cover NOTE The indoor unit service cover needs to be removed for any task inside the indoor unit 1 Remove the screws which fix the service cover x2 Both sides 2 Slide the service cover slightly upward and remove it pulling to back CAUTION Pay attention of no falling off the service cover Take care when removing service cover the parts inside the unit could be hot ...

Page 113: ...avoid an electrical shock Do not touch the switch for DHW tank heater operation when handling the electrical box Keep the position of this switch in factory setting position Automatic operation Switch SW1 Indicative label Remove the electrical box cover 1 Remove the indoor unit service cover as explained above 2 Unscrew the 2 front screws of the electrical box cover and then rotate it ...

Page 114: ...cal to connect the indoor unit to the heating system by using the factory supplied gaskets just below the valves G 1 1 4 connection Then the space heating installation can be carried out Gaskets Shut off valves 8 2 3 1 Drain pipes connection For a correct drainage connect the drain pipe for the safety valve to the general draining system NOTE The safety valve is activated when water pressure reach...

Page 115: ... one person can perform this operation during this operation it is possible to rest the cover on the electrical box 2 Place the holes on the right side of the indoor unit cover over the back plate hooks x2 loca tions When the right side is centred repeat the operation on the left side Put the holes on the left side of the indoor unit cover into the back plate frame hooks x2 locations ...

Page 116: ...ENANCE 3 Once the 4 hooks are placed into their corresponding cover holes adjust the cover to the end of the hooks 4 Fix the indoor unit service cover using the screw which had been previously removed during the unpacking procedure x2 Both sides ...

Page 117: ...t cover needs to be removed for any task inside the indoor unit Back left and right covers do not need to be removed Removing the indoor unit front cover 1 Remove the 2 screws of the indoor unit front cover 2 Slide the service cover slightly upward and remove it pulling to back CAUTION Pay attention of no falling off the service cover Take care when removing service cover the parts inside the unit...

Page 118: ...isconnect the unit from the power supply before touching any of the parts in order to avoid an electrical shock Do not touch the switch for DHW tank heater operation when handling the electrical box Keep the position of this switch in factory setting position Automatic operation Switch SW1 Indicative label ...

Page 119: ...components in order to avoid damaging it 8 3 3 Space heating pipes connection The unit is factory supplied with two shut down valves to be connected to the water inlet outlet pipe With these shut down valves it is very practical to connect the indoor unit to the heating system by using the factory supplied gaskets just below the valves 2 3HP G 1 4 6HP G 1 1 4 Then the space heating installation ca...

Page 120: ...also a shut down valve field supplied in the DHW outlet connection in order to make easier any maintenance work NOTE For more details refer to the section 5 5 Space heating and DHW for YUTAKI M YUTAKI Hydrosplit 8 3 4 1 Drain pipes connection For a correct drainage connect the drain pipe for the safety valve located at the top rear side of the unit to the general draining system Safety valve P T r...

Page 121: ...ischarge pipe must be made of metal or any other material capable to withstand the high pressure and high temperature from the P T relief valve For a correct installation and workpipe of the discharge pipe on UK market models refer to UK Building Requirements ...

Page 122: ...v 0 06 2022 Johnson Controls Hitachi Air Conditioning Spain S A U Ronda Shimizu 1 Políg Ind Can Torrella 08233 Vacarisses Barcelona Spain Copyright 2022 Johnson Controls Hitachi Air Conditioning Spain S A U All rights reserved ...

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Hitachi YUTAKI H Combi HWD-WE-220S, Installation & Operation Manual

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