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Piping installation
Installer reference guide
74
EPRA14~18D + ET23E
Daikin Altherma 3 H HT F
4P644739-1A – 2022.03
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Connecting piping – Air, moisture, dust.
If air, moisture or dust gets into the
circuit, problems may occur. To prevent this:
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ONLY use clean pipes.
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Hold the pipe end downwards when removing burrs.
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Cover the pipe end when inserting it through a wall, to prevent dust and/or
particles from entering the pipe.
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Use a decent thread sealant to seal connections.
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When using non-brass metallic piping, make sure to insulate both materials
from each other to prevent galvanic corrosion.
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Because brass is a soft material, use appropriate tooling for connecting the
water circuit. Inappropriate tooling will cause damage to the pipes.
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Insulation.
Insulate up to the base of the heat exchanger.
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Freeze.
Protect against freezing.
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Closed circuit.
Use the indoor unit ONLY in a closed water system. Using the
system in an open water system will lead to excessive corrosion.
▪
Piping length.
It is recommended to avoid long runs of piping between the
domestic hot water tank and the hot water end point (shower, bath,…) and to
avoid dead ends.
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Piping diameter.
Select the water piping diameter in relation to the required
water flow and the available external static pressure of the pump. See
252] for the external static pressure curves of the indoor
unit.
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Water flow.
You can find the minimum required water flow for indoor unit
operation in the following table. In all cases, this flow needs to be guaranteed.
When the flow is lower, the indoor unit will stop operation and display error 7H.
Minimum required flow rate
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For E models: 25 l/min
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For E7 models: 20 l/min
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Field supply components – Water.
Only use materials that are compatible with
water used in the system and with the materials used in the indoor unit.
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Field supply components – Water pressure and temperature.
Check that all
components in the field piping can withstand the water pressure and water
temperature.
▪
Water pressure – Domestic hot water.
The maximum water pressure is 4 bar
(=0.4 MPa). Provide adequate safeguards in the water circuit to ensure that the
maximum pressure is NOT exceeded. The minimum water pressure to operate is
1 bar (=0.1 MPa).
▪
Water pressure –
Space heating/cooling circuit.
The maximum water pressure is
3 bar (=0.3 MPa). Provide adequate safeguards in the water circuit to ensure that
the maximum pressure is NOT exceeded. The minimum water pressure to
operate is 1 bar (=0.1 MPa).
▪
Water temperature.
All installed piping and piping accessories (valve,
connections,…) MUST withstand the following temperatures:
INFORMATION
The following figure is an example and may NOT completely match your system
layout
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