Hitachi YUTAKI S80 Series Installation And Operation Manual page 13

C O N T E N T S
1 SAFETY SUMMARY ............................................................15
2 IMPORTANT NOTICE ..........................................................15
2.1 General Notes for the system.........................................15
2.2 General notes for hydraulic system ................................16
2.2.1 Space heating main notes (Heating coil) ..................16
2.2.2 DHW main notes .......................................................16
3 SYSTEM DESCRIPTION .....................................................16
4 NAME OF PARTS ................................................................17
4.1 Domestic hot water tank (DHWS-(195/260)S-2.0H1E) ..17
5 WATER PIPING ....................................................................18
5.1 Domestic hot water hydraulic circuit ...............................18
5.1.1 Hydraulic circuit .........................................................18
5.1.2 DHW piping ...............................................................19
5.1.3 Water quality .............................................................20
5.1.4 Water filling ...............................................................21
5.2 Space heating hydraulic circuit.......................................21
6 ELECTRICAL WIRING .........................................................21
6.1 General check ................................................................21
6.2 Electrical wiring between indoor unit and DHW tank......22
7 INSTALLATION ....................................................................23
7.1 General notes .................................................................23
7.1.1 Reception ..................................................................23
7.1.2 Flexible water pipes considerations ..........................24
7.2 Selecting an installation configuration ............................25
7.2.1 DHW tank configurations ..........................................25
7.2.2 Dimensions ...............................................................25
7.2.3 Service space ...........................................................26
7.3 Removing the covers......................................................27
7.3.1 Removing the domestic hot water tank covers .........27
7.4 Installation of indoor unit with HITACHI tank
(Tank integrated over the indoor unit).............................28
7.4.1 Water pipes connection to the indoor unit
(Space heating pipes)................................................28
7.4.2 Drain pipes connection .............................................28
7.4.3 Water pipes connection to the indoor unit
(Heating coil pipes)....................................................28
7.4.4 Refrigerant piping connection and indoor unit's placing 31
7.4.5 Water pipes connection to the space heating
(Space heating pipes)...............................................31
7.4.6 Water pipes connection to the tank (DHW pipes) .....31
7.4.7 Removing the mounting foot .....................................33
7.4.8 Tank over the indoor unit assembly...........................33
7.4.9 Water pipes connection to the tank
(heating coil pipes)....................................................34
7.4.10 Water pipes connection to the DHW installation
(DHW pipes)............................................................34
7.4.11 Power wiring connection .........................................35
7.4.12 Tank wiring connection ............................................35
7.4.13 Levelling procedure .................................................36
7.4.14 Tank's fixation to the wall ........................................36
7.4.15 Test and check ........................................................36
7.4.16 Cover's assembly ....................................................36
7.5 Installation of Indoor unit with HITACHI tank
(Tank beside the indoor unit) .........................................37
7.5.1 Water pipes connection to the indoor unit
(Space heating pipes).................................................37
7.5.2 Drain pipes connection .............................................37
7.5.3 Water pipes connection to the indoor unit
(Flexible water pipes kit (ATW-FWP-01))..................37
7.5.4 Refrigerant piping connection and indoor unit's placing 40
13 PMML0291A rev.2 - 09/2014
7.5.5 Water pipes connection to the space heating
(Space heating pipes)...............................................40
7.5.6 Water pipes connection to the tank (DHW pipes) .....41
7.5.7 Water pipes connection to the tank (heating coil pipes) 41
7.5.8 DHW tank's placing ...................................................42
7.5.9 C onnection between the flexible water pipes kit
(ATW-FWP-01) and the heating coil pipes................43
7.5.10 Water pipes connection to the DHW installation
(DHW pipes)............................................................44
7.5.11 Power wiring connection .........................................44
7.5.12 Tank wiring connections ..........................................44
7.5.13 Levelling procedure .................................................46
7.5.14 DHW tank fixation to the wall ..................................47
7.5.15 Test and check ........................................................47
7.5.16 Cover's assembly ....................................................47
8 DHW TANK OPERATION ....................................................48
9 CONTROL DEVICE SETTING .............................................48
10 COMMISSIONING ..............................................................49
10.1 Preliminary check ...........................................................49
10.1.1 Checking the unit ....................................................49
10.1.2 Electrical checking ..................................................49
10.1.3 Hydraulic circuit checking .......................................49
10.2 Commissioning procedure..............................................49
11 MAINTENANCE .................................................................50
11.1 General procedure .........................................................50
11.2 Descaling........................................................................50
11.3 Draining ..........................................................................51
11.3.1 Heating coil circuit ...................................................51
11.3.2 DHW circuit .............................................................51
12 TROUBLESHOOTING .......................................................52
13 DHW TANK GENERAL DATA ............................................53