Daikin EWYA004D2V3P Installer's Reference Manual page 151

EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09
# Code
[4.4] [7‑02]
NOTICE
NOT configuring the system in the following way can cause damage to the heat
emitters. If there are 2 zones, it is important that in heating:
▪
the zone with the lowest water temperature is configured as the main zone, and
▪
the zone with the highest water temperature is configured as the additional zone.
NOTICE
If there are 2 zones and the emitter types are wrongly configured, water of high
temperature can be sent towards a low temperature emitter (underfloor heating). To
avoid this:
▪
Install an aquastat/thermostatic valve to avoid too high temperatures towards a
low temperature emitter.
▪
Make sure you set the emitter types for the main zone [2.7] and for the
additional zone [3.7] correctly in accordance with the connected emitter.
Pump operation mode
When the space heating/cooling operation is OFF, the pump is always OFF. When
space heating/cooling operation is ON, you have the choice between these
operation modes:
Description
▪ 1: Dual zone
Two leaving water temperature zones. The
main leaving water temperature zone consists
of the higher load heat emitters and a mixing
station to achieve the desired leaving water
temperature. In heating:
c
a Additional LWT zone: Highest temperature
b Main LWT zone: Lowest temperature
c Mixing station
11 Configuration
|
a
b
Installer reference guide
151