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Application guidelines
Installer reference guide
35
EPRA14~18D + ET23E
Daikin Altherma 3 H HT F
4P644739-1A – 2022.03
NOTICE
If you install this unit as a single-zone application, then:
Setup.
Install a bypass between the space heating water inlet and outlet of the
additional zone (=direct zone). Do NOT interrupt the water flow by closing the shut-
off valves.
a
a
Bypass
Configuration.
Set field setting [7-02]=0 (
Number of zones
=
Single zone
).
6.2.1 Multiple rooms – Two LWT zones
This unit is designed to deliver water at 2 different temperatures. A typical
installation consists of underfloor heating at a lower temperature and radiators at
a higher water temperature.
In this document:
▪
Main zone = Zone with the lowest design temperature in heating, and the highest
design temperature in cooling
▪
Additional zone = Zone with the highest design temperature in heating, and the
lowest design temperature in cooling
Typical example:
Room (zone)
Heat emitters: Design temperature
Living room (main zone)
Underfloor heating:
▪
In heating: 35°C
▪
In cooling
(a)
: 20°C (only refreshment,
no real cooling allowed)
Bed rooms (additional zone)
Heat pump convectors:
▪
In heating: 45°C
▪
In cooling: 12°C
(a)
In cooling mode, you can allow the underfloor heating (main zone) to provide refreshment
(no real cooling), or NOT allow it. See setup below.
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