HXY48TAVJU
VRV System indoor unit
3P616151-1A – 2021.12
Installation and operation manual
1
Content
Page
1. Safety considerations................................................................. 2
2. About the documentation ........................................................... 3
2.1.
About this document ...................................................................... 3
2.2.
Scope of the manual ...................................................................... 4
2.3.
Documentation set ......................................................................... 4
3. About the box............................................................................. 4
3.1.
Indoor unit ...................................................................................... 4
3.1.1.
To unpack the indoor unit ................................................... 4
3.1.2.
To remove the accessories from the indoor unit................. 4
4. About the unit and options ......................................................... 5
4.1.
General information........................................................................ 5
4.2.
Identification ................................................................................... 5
4.2.1.
Identification label: Indoor unit............................................ 5
4.3.
Possible combinations of unit and options ..................................... 5
4.3.1.
List of options for indoor unit .............................................. 5
4.3.2.
Possible combinations of indoor unit and outdoor unit ....... 6
5. Application guidelines ................................................................ 6
5.1.
Overview: Application guidelines ................................................... 6
5.2.
Setting up the space heating/cooling system ................................. 6
5.2.1.
Single room ........................................................................ 6
5.3.
Using an auxiliary heat source ....................................................... 7
6. Preparation ................................................................................ 7
6.1.
Preparing installation site ............................................................... 7
6.1.1.
Installation site requirements of the indoor unit .................. 7
6.2.
Preparing water circuit.................................................................... 8
6.2.1.
Selection of the type of heat emitters ................................. 8
6.2.2.
Water circuit requirements.................................................. 8
6.2.3.
Formula to calculate the expansion vessel pre-pressure ... 9
6.2.4.
To check the water volume ................................................. 9
6.2.5.
Changing the pre-pressure of the expansion vessel ........ 10
6.2.6.
To check the water volume: Examples ............................. 10
6.3.
Preparing electrical wiring ............................................................ 10
6.3.1.
About preparing electrical wiring ...................................... 10
6.3.2.
Overview of electrical connections on the indoor unit .......11
7. Installation................................................................................ 11
7.1.
Mounting the indoor unit................................................................11
7.1.1.
To install the indoor unit.....................................................11
7.1.2.
To install the drainpan kit .................................................. 12
7.1.3.
To connect the refrigerant piping to the outdoor unit ........ 12
7.2.
Connecting the water piping......................................................... 12
7.2.1.
To connect the water piping.............................................. 12
7.2.2.
To install the bottom plate and connect safety valve drain
hose.................................................................................. 13
7.2.3.
To fill the water circuit ....................................................... 13
7.2.4.
Water quality requirements............................................... 14
7.2.5.
To insulate the water piping .............................................. 14
7.3.
Connecting the electrical wiring ................................................... 14
7.3.1.
Precautions on electrical wiring work ............................... 14
7.3.2.
System overview of field wiring ........................................ 15
7.3.3.
Requirements ................................................................... 15
7.3.4.
To open the switch box cover ........................................... 15
7.3.5.
To connect the electrical wiring on the indoor unit............ 15
7.3.6.
To connect the user interface ........................................... 15
7.4.
Finishing the indoor unit installation ............................................. 17
7.4.1.
To fix the user interface cover to the indoor unit............... 17
7.4.2.
To close the indoor unit..................................................... 17
8. Commissioning ........................................................................ 17
8.1.
Pre-operation checks ................................................................... 17
8.2.
Final air purging ........................................................................... 18
8.3.
Field settings ................................................................................ 18
8.3.1.
Procedure ......................................................................... 18
8.3.2.
Detailed description .......................................................... 18
8.4.
Field setting list for Installation Manual ........................................ 22
8.5.
Final check and test run ............................................................... 24
8.5.1.
Final check ....................................................................... 24
8.5.2.
System test run................................................................. 24
8.5.3.
Indoor unit individual test run............................................ 24
8.6.
Service and maintenance............................................................. 25
8.6.1.
Maintenance activities ...................................................... 25
8.6.2.
Malfunction codes list ....................................................... 25
8.6.3.
Important information regarding the refrigerant used ....... 25
9. Hand-over to the user .............................................................. 26
10. Operation of the unit ................................................................ 26
10.1. Introduction .................................................................................. 26
10.1.1.
General information.......................................................... 26
10.2. Quick start-up of the unit .............................................................. 26
10.2.1.
Space cooling/heating operation ...................................... 26
10.3. Operating the unit......................................................................... 27
10.3.1.
Operating the user interface............................................. 27
10.3.2.
Name and function of buttons and icons .......................... 27
10.3.3.
Setting up the controller ................................................... 28
10.3.4.
Space cooling operation (
c
)............................................. 29
10.3.5.
Space heating operation (
h
) ............................................ 29
10.3.6.
Other operation modes..................................................... 31
10.3.7.
Temperature read-out mode............................................. 31
10.3.8.
Schedule timer operation ................................................. 31
10.3.9.
Space heating................................................................... 31
10.3.10. Programming and consulting the schedule timer ............. 33
10.3.11. Operating the optional demand PCB................................ 36
10.3.12. Operating the optional user interface ............................... 36
10.4. Field settings ................................................................................ 36
10.4.1.
Procedure......................................................................... 37
11. Maintenance ............................................................................ 38
11.1. Important information regarding the refrigerant used................... 38
11.2. Maintenance activities.................................................................. 38
12. Troubleshooting ....................................................................... 38
12.1. Malfunction codes list................................................................... 38
13. Technical Data ......................................................................... 38
13.1. Piping diagram ............................................................................. 38
13.2. Wiring diagram ............................................................................. 39
13.3. Electrical components box ........................................................... 40
13.4. Operation range HXY48............................................................... 40
13.5. ESP curve .................................................................................... 40
14. Disposal requirements ............................................................. 40
The English text is the original instruction. Other languages are
translations of the original instructions.
HXY48TAVJU
VRV System indoor unit
Installation and
operation manual
01_EN_3P616151-1A.fm 1 ページ ２０２１年１２月１４日 火曜日 午後１時２９分