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EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06
Example: Changeover restrictions
When
During cold season.
Example: October, November, December, January,
February and March.
During warm season.
Example: June, July and August.
In-between.
Example: April, May and September.
The unit determines its operation mode by the outdoor temperature if:
▪
Operation mode=Automatic, and
▪
Operation mode schedule=Reversible.
The unit determines its operation mode in such a way that it will always stay within
the following operation ranges:
▪
Space heating off temperature
▪
Space cooling off temperature
The outdoor temperature is time-averaged. If the outdoor temperature drops, the
operation mode will switch to heating and vice versa.
If the outdoor temperature is between the Space heating off temperature
and the Space cooling off temperature, the operation mode remains
unchanged.
Operation range
Depending on the average outdoor temperature, the operation of the unit in space
heating or space cooling is prohibited.
#
Code
[4.3.1]
[4-02]
[4.3.2]
[F-01]
(a)
This setting is also used in automatic heating/cooling changeover.
NOTICE
Maximum value [4-02]. For models without integrated backup heater:
▪
Default value [4‑02]=25°C. You can change this value, but do NOT exceed the
maximum value.
▪
If the external backup heater kit is installed: Maximum value [4‑02]=35°C
▪
If the external backup heater kit is NOT installed: Maximum value [4‑02]=25°C
Exception: If the system is configured in room thermostat control with one leaving
water temperature zone and quick heat emitters, the operation mode will change
based on the measured indoor temperature. Besides the desired heating/cooling
Heating only
Cooling only
Reversible
Description
Space heating off temperature: When
the averaged outdoor temperature rises above
this value, space heating is turned off.
▪
14°C~35°C
Space cooling off temperature: When
the averaged outdoor temperature drops below
this value, space cooling is turned off.
▪
10°C~35°C
11
Configuration
|
Restriction
(a)
(a)
Installer reference guide
151
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