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8
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Piping installation
8 Piping installation
In this chapter
8.1 Preparing refrigerant piping
8.1.1 Refrigerant piping requirements
Installer reference guide
84
CAUTION
See
"4 Specific installer safety
complies with all safety regulations.
8.1
Preparing refrigerant piping ...................................................................................................................................................
8.1.1
Refrigerant piping requirements ...........................................................................................................................
8.1.2
Refrigerant piping insulation..................................................................................................................................
8.2
Connecting the refrigerant piping..........................................................................................................................................
8.2.1
About connecting the refrigerant piping...............................................................................................................
8.2.2
Precautions when connecting the refrigerant piping............................................................................................
8.2.3
Guidelines when connecting the refrigerant piping..............................................................................................
8.2.4
Pipe bending guidelines .........................................................................................................................................
8.2.5
To flare the pipe end..............................................................................................................................................
8.2.6
To braze the pipe end ............................................................................................................................................
8.2.7
Using the stop valve and service port....................................................................................................................
8.2.8
To connect the refrigerant piping to the outdoor unit .........................................................................................
8.2.9
To connect the refrigerant piping to the indoor unit............................................................................................
8.3
Checking the refrigerant piping..............................................................................................................................................
8.3.1
About checking the refrigerant piping...................................................................................................................
8.3.2
Precautions when checking the refrigerant piping ...............................................................................................
8.3.3
To check for leaks...................................................................................................................................................
8.3.4
To perform vacuum drying ....................................................................................................................................
8.3.5
To insulate the refrigerant piping ..........................................................................................................................
8.4
Charging refrigerant ...............................................................................................................................................................
8.4.1
About charging refrigerant ....................................................................................................................................
8.4.2
Precautions when charging refrigerant .................................................................................................................
8.4.3
To determine the additional refrigerant amount..................................................................................................
8.4.4
To determine the complete recharge amount......................................................................................................
8.4.5
To charge additional refrigerant ............................................................................................................................
8.4.6
To fix the fluorinated greenhouse gases label.......................................................................................................
8.5
Preparing water piping ...........................................................................................................................................................
8.5.1
Water circuit requirements ...................................................................................................................................
8.5.2
Formula to calculate the expansion vessel pre-pressure......................................................................................
8.5.3
To check the water volume and flow rate............................................................................................................. 100
8.5.4
Changing the pre-pressure of the expansion vessel ............................................................................................. 102
8.5.5
To check the water volume: Examples .................................................................................................................. 103
8.6
Connecting water piping ........................................................................................................................................................ 103
8.6.1
About connecting the water piping ....................................................................................................................... 103
8.6.2
Precautions when connecting the water piping.................................................................................................... 103
8.6.3
Connecting the water piping of the indoor unit.................................................................................................... 104
8.6.4
Connecting the water piping of the gas boiler ...................................................................................................... 105
8.6.5
To fill the space heating circuit .............................................................................................................................. 106
8.6.6
To fill the domestic water circuit of the gas boiler................................................................................................ 107
8.6.7
To fill the domestic hot water tank........................................................................................................................ 107
8.6.8
To insulate the water piping .................................................................................................................................. 107
8.7
Connecting the gas piping ...................................................................................................................................................... 108
8.7.1
To connect the gas pipe ......................................................................................................................................... 108
8.7.2
To perform an air purge on the gas supply ........................................................................................................... 108
INFORMATION
Also read the precautions and requirements in the
4
precautions" [
instructions" [
12].
EVLQ05+08CA + EHYHBH05A + EHYHBH/X08A + EHYKOMB33AA
4
21] to make sure this installation
"3 General safety
Daikin Altherma hybrid heat pump
4P355634-1G - 2022.09
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