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8 Piping installation
In this chapter
8.1 Preparing refrigerant piping
8.1.1 Refrigerant piping requirements
ERRA08~12E + ELVH/X12S18+23E
Daikin Altherma 3 R MT F
4P708474-1 - 2023.05
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.................................................................................................................... 100
8.2.8
To connect the refrigerant piping to the outdoor unit ......................................................................................... 101
8.2.9
To connect the refrigerant piping to the indoor unit............................................................................................ 103
8.3
Checking the refrigerant piping.............................................................................................................................................. 103
8.3.1
About checking the refrigerant piping................................................................................................................... 103
8.3.2
Precautions when checking the refrigerant piping ............................................................................................... 104
8.3.3
Checking refrigerant piping: Setup ........................................................................................................................ 104
8.3.4
To check for leaks................................................................................................................................................... 105
8.3.5
To perform vacuum drying .................................................................................................................................... 105
8.4
Charging refrigerant ............................................................................................................................................................... 106
8.4.1
About charging refrigerant .................................................................................................................................... 106
8.4.2
Precautions when charging refrigerant ................................................................................................................. 108
8.4.3
Charging additional refrigerant.............................................................................................................................. 108
8.4.4
Completely recharging refrigerant ........................................................................................................................ 109
8.4.5
To fix the fluorinated greenhouse gases label....................................................................................................... 110
8.5
Preparing water piping ........................................................................................................................................................... 110
8.5.1
Water circuit requirements ................................................................................................................................... 110
8.5.2
Formula to calculate the expansion vessel pre-pressure...................................................................................... 113
8.5.3
To check the water volume and flow rate............................................................................................................. 113
8.5.4
Changing the pre-pressure of the expansion vessel ............................................................................................. 115
8.5.5
To check the water volume: Examples .................................................................................................................. 116
8.6
Connecting water piping ........................................................................................................................................................ 116
8.6.1
About connecting the water piping ....................................................................................................................... 116
8.6.2
Precautions when connecting the water piping.................................................................................................... 117
8.6.3
To connect the water piping.................................................................................................................................. 117
8.6.4
To connect the recirculation piping....................................................................................................................... 119
8.6.5
To fill the water circuit ........................................................................................................................................... 119
8.6.6
To fill the domestic hot water tank........................................................................................................................ 120
8.6.7
To insulate the water piping .................................................................................................................................. 120
INFORMATION
Also read the precautions and requirements in the
precautions" [
4
Also see
"7.1.4 Special requirements for R32
requirements.
▪
Piping length: See
"7.1.3 Installation site requirements of the indoor
▪
Piping material: phosphoric acid deoxidised seamless copper
10].
8
Piping installation
|
"2 General safety
4
units" [
68] for additional
unit" [
Installer reference guide
95
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4
67].
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