Daikin Altherma 3 H HT - Multiple Rooms - Two LWT Zones

6 | Application guidelines
Installer reference guide
35
EPRA14~18D + ETVZ16S18+23E
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.