Daikin HXHD125A7V1B, Installation Manual, Page: 3 / 52

HXHD125A7V1B
VRVIII system indoor unit
4PW62584-1A – 11.2010
Installation manual
1
C
ONTENTS
Page
1. Definitions .................................................................................. 2
1.1. Meaning of warnings and symbols ................................................. 2
1.2. Meaning of used terms................................................................... 2
2. General Safety precautions ....................................................... 2
3. Introduction ................................................................................ 3
3.1. General information........................................................................ 3
3.2. Combination and options ............................................................... 3
3.3. Scope of the manual ...................................................................... 3
3.4. Model identification......................................................................... 3
4. Accessories ............................................................................... 4
4.1. Accessories supplied with this unit................................................. 4
5. Overview of unit ......................................................................... 4
5.1. Opening the unit ............................................................................. 4
5.2. Main components in the unit .......................................................... 5
5.3. Switch box main components......................................................... 7
6. Design of the water circuit.......................................................... 7
6.1. Selection of the type of heat emitters ............................................. 7
6.2. General precautions concerning water circuit ................................ 8
6.3. Application examples ..................................................................... 9
Floor heating without domestic hot water tank ............................... 9
Radiator with domestic hot water tank ........................................... 9
Fan coils without domestic hot water tank...................................... 9
Application example with several heat emitters............................ 10
7. Installation of the unit ............................................................... 10
7.1. Selecting an installation location .................................................. 10
General precautions on installation location................................. 10
7.2. Dimensions and service space .................................................... 11
Dimensions of unit........................................................................ 11
Service space of the unit.............................................................. 12
7.3. Inspecting, handling and unpacking the unit ................................ 12
7.4. Installing the unit .......................................................................... 12
Preparation before installation on final installation place ............. 12
Installation on final installation position ........................................ 14
Connecting the water circuit ......................................................... 14
Fix the indoor unit refrigerant connections ................................... 15
Close the unit ............................................................................... 15
7.5. Leak test and vacuuming drying R410A circuit ............................ 16
7.6. Water piping ................................................................................. 16
Checking the water volume and expansion
vessel pre-pressure...................................................................... 16
Setting the pre-pressure of the expansion vessel ........................ 17
Charging water ............................................................................. 17
8. Electrical wiring work ............................................................... 18
8.1. Precautions on electrical wiring work ........................................... 18
8.2. Internal wiring – Parts table.......................................................... 19
8.3. System overview of field wiring .................................................... 19
8.4. Requirements ............................................................................... 20
8.5. Routing ......................................................................................... 20
8.6. Connection ................................................................................... 21
Installation and connection of the remote controller..................... 21
Connection to a benefit kWh rate power supply........................... 22
9. Start-up and configuration ....................................................... 24
9.1. Pre-operation checks ................................................................... 24
9.2. Final air purging............................................................................ 24
9.3. Field settings ................................................................................ 24
9.4. Procedure..................................................................................... 25
9.5. Detailed description...................................................................... 25
9.6. Simultaneous demand of space heating and domestic water
heating.......................................................................................... 32
9.7. Multiple set point control............................................................... 36
9.8. Field setting table ......................................................................... 38
10. Final check and test run........................................................... 40
10.1. Final check ................................................................................... 40
Multi tenant power supply check .................................................. 40
10.2. System test run ............................................................................ 40
10.3. Indoor unit individual test run ....................................................... 40
Temperature read-out mode......................................................... 40
Procedure for space heating ........................................................ 40
Procedure for domestic water heating.......................................... 41
11. Maintenance and service ......................................................... 41
11.1. Maintenance activities .................................................................. 41
Checks ......................................................................................... 42
11.2. Important information regarding the refrigerant used................... 42
11.3. Vacuuming/recovery and maintenance on refrigerant side .......... 43
System overview .......................................................................... 44
Recovery/vacuuming overview for 1 indoor unit maintenance
(R410A circuit connections) ......................................................... 44
12. Troubleshooting........................................................................ 44
12.1. General guidelines ....................................................................... 44
12.2. Opening the unit ........................................................................... 44
12.3. Draining the system...................................................................... 45
12.4. General symptoms ....................................................................... 45
12.5. Error codes................................................................................... 45
13. Unit specifications .................................................................... 46
Technical specifications................................................................ 46
Electrical specifications: power supply ......................................... 46
Electrical specifications: multi tenant power supply...................... 46
Thank you for purchasing this product.
The original instructions are written in English. All other languages
are translations of the original instructions.
HXHD125A7V1B
VRVIII system indoor unit
Installation manual
CAREFULLY READ THESE INSTRUCTIONS BEFORE
INSTALLATION. THEY WILL TELL YOU HOW TO INSTALL
AND HOW TO CONFIGURE THE UNIT PROPERLY.
KEEP THIS MANUAL IN A HANDY PLACE FOR FUTURE
REFERENCE.