Multiple Rooms - Two Lwt Zones - Daikin EPRA08EAV3 Installer's Reference Manual

6.2.3 Multiple rooms – Two LWT zones
EPRA08~12EAV3+W1 + ETVH/X12S18+23EA6V+9W
Daikin Altherma 3 H MT F
4P634886-1 – 2021.03
If the heat emitters selected for each room are designed for different leaving water
temperatures, you can use different leaving water temperature zones (maximum
2).
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
CAUTION
If there is more than one leaving water zone, ALWAYS install a mixing valve station in
the main zone to decrease (in heating)/increase (in cooling) the leaving water
temperature when the additional zone has demand.
Typical example:
Room (zone)
Living room (main zone)
Bed rooms (additional zone)
(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.
Setup
Three bizone kit system variations are possible:
1 System without hydraulic separator:
f
2 System with hydraulic separator for main zone:
6
|
Heat emitters: Design temperature
Underfloor heating:
▪ In heating: 35°C
(a)
▪ In cooling
no real cooling allowed)
Heat pump convectors:
▪ In heating: 45°C
▪ In cooling: 12°C
B C
A
a a
D
E
e
d
c
Application guidelines
: 20°C (only refreshment,
b
g
Installer reference guide
43