11 | Configuration
Installer reference guide
138
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06
# Code Description
[2.6] [1-06]
[1-07]
[1-08]
[1-09]
Set weather-dependent cooling:
Note: There are 2 methods to set the weather
dependent curve. See "2-points curve"[4125]
and "Slope-offset curve"[4126]. Both curve
types require 4 field settings to be configured
according to the figure below.
[1-09]
[1-08]
T
a
T
t
[1-06] [1-07]
▪ T
t
: Target leaving water temperature (main
zone)
▪ T
a
: Outdoor temperature
▪ [1-06]: Low outdoor ambient temperature.
10°C~25°C
▪ [1-07]: High outdoor ambient temperature.
25°C~43°C
▪ [1-08]: Desired leaving water temperature
when the outdoor temperature equals or drops
below the low ambient temperature.
[9‑03]°C~[9‑02]°C
Note: This value should be higher than [1‑09]
as for low outdoor temperatures less cold
water is required.
▪ [1-09]: Desired leaving water temperature
when the outdoor temperature equals or rises
above the high ambient temperature.
[9‑03]°C~[9-02]°C
Note: This value should be lower than [1‑08] as
for high outdoor temperatures colder water is
required.
Emitter type
Heating up or cooling down the main zone can take longer. This depends on:
▪ The water volume of the system
▪ The heater emitter type of the main zone
The setting Emitter type can compensate for a slow or a quick heating/cooling
system during the heat up/cool down cycle. In room thermostat control, Emitter
type influences the maximum modulation of the desired leaving water
temperature, and the possibility for usage of the automatic cooling/heating
changeover based on the indoor ambient temperature.
It is important to set Emitter type correctly and in accordance with your system
layout. The target delta T for the main zone depends on it.
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