Daikin Altherma 3 H F - Page 124

10 | Configuration
Installer reference guide
124
EPGA11~16DAV3(7) + EAVZ16S18+23DA6V(7)+9W
Daikin Altherma 3 H F
4P556075-1A – 2021.09
2 Select one of the following options:
▪ Heating: Only heating mode
▪ Cooling: Only cooling mode
▪ Automatic: The operation mode changes automatically
between heating and cooling based on the outdoor
temperature. Restricted per month according to the
Operation mode schedule [4.2].
Automatic heating/cooling changeover is only applicable when EKHVCONV* is
installed.
When Automatic is selected, the unit switches its operation mode, based on the
Operation mode schedule [4.2]. In this schedule, the end user indicates which
operation is allowed for each month.
Operation range
Depending on the average outdoor temperature, the operation of the unit in space
heating or space cooling is prohibited.
# Code Description
[4.3.1] [4-02] Space heating off temperature: When
the averaged outdoor temperature rises above
this value, space heating is turned off.
(a)
▪ 14°C~35°C
[4.3.2] [F-01] Space cooling off temperature: When
the averaged outdoor temperature drops below
this value, space cooling is turned off.
(a)
▪ 10°C~35°C
(a)
This setting is also used in automatic heating/cooling changeover.
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
room temperature, the installer sets a hysteresis value (e.g. when in heating, this
value is related to the desired cooling temperature) and an offset value (e.g. when
in heating, this value is related to the desired heating temperature).
Example: A unit is configured as following:
▪ Desired room temperature in heating mode: 22°C
▪ Desired room temperature in cooling mode: 24°C
▪ Hysteresis value: 1°C
▪ Offset: 4°C
Changeover from heating to cooling will occur when the room temperature rises
above the maximum of the desired cooling temperature added by the hysteresis
value (thus24+1=25°C) and the desired heating temperature added by the offset
value (thus22+4=26°C).
Oppositely, changeover from cooling to heating will occur when the room
temperature drops below the minimum of the desired heating temperature
subtracted by the hysteresis value (thus 22–1=21°C) and the desired cooling
temperature subtracted by the offset value (thus24–4=20°C)
Guard timer to prevent too frequent changing from heating to cooling and vice
versa.