Daikin Altherma 3 R ECH2O, Installation And Operating Manual

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3 Set-up and installation
Installation and operating manual
24
Daikin Altherma EHS(X/H)(B)-D
Daikin Altherma 3 R ECH ₂ O
008.1451099_00 – 07/2020
3‒35 Connecting the heat pump outdoor unit
INFORMATION
If the heat pump outdoor unit is shut off via a circuit
specified by the utility company, the indoor unit is not shut
off.
3.7.6 Connecting the outdoor temperature
sensor (optional)
The heat pump outdoor unit has an integrated outdoor temperature
sensor that is used for weather-compensated inflow temperature
control with frost protection function. The weather-compensated
inflow temperature control can be further optimised with the optional
outdoor temperature sensor.
▪ Choose a location at about one third of the building height
(minimum distance from floor: 2 m) on the coldest side of the
building (north or north-east). Ensure that the location is not near
any external heat sources (flues, air ducts) or subject to direct
solar radiation.
▪ Place outdoor temperature sensors in such a way that the cable
exit points face downwards (prevents the ingress of humidity).
CAUTION
Laying the sensor and mains lines in parallel within an
installation conduit can lead to major malfunctions during
controlled operation of the indoor unit.
▪ Always lay the sensor line separately.
1 Connect the outdoor temperature sensor to a twin-core sensor
line (minimum diameter
1 mm
2
).
2 Lay the sensor line to the indoor unit.
3 Follow the installation steps in "3.7.4 General information on the
electrical connection" [
4
23].
4 Connect the sensor line to terminal strip XTA1 (see
"3.7.2 Position of the PCBs and terminal strips" [ 4 23]).
5 In the controller RoCon+ HP1 set the [Outside temperature
sensor] parameter to "On" [→ Main menu → Configuration
→ Sensors].
3.7.7 External switching contact
Connecting an external switching contact ( " 3‒36 EXT switching
contact connection" [
4
24]) enables the operating mode of the
indoor unit to be switched over.
The current operating mode is switched by a changing resistance
value (
" 3‒2 Resistance values for evaluating the EXT
signal" [
4
24]). The changeover of the operating mode is only
effective for a long as the external switching contact is closed.
The operating mode has an effect on the direct circuit of the indoor
unit as well as all other heating circuits connected to this device as
an option.
When special functions (e.g. "Manual operation") are activated, the
input is not evaluated.
3‒36 EXT switching contact connection
3‒2 Resistance values for evaluating the EXT signal
Operating mode Resistance R
V
Tolerance
Standby <680Ω ±5%
Heating 1200Ω
Reduce 1800Ω
Summer 2700Ω
Automatic 1 4700Ω
Automatic 2 8200Ω
INFORMATION
The input is not considered for resistance values greater
than the value for "Automatic 2".
INFORMATION
The [Heating support (HZU)] function integrated in the
RoCon+ HP1 controller (see the controller operating
instructions) makes it unnecessary to connect the EXT
connection to the burner blocking contact connection of the
solar system.
3.7.8 EBA (external requirement request)
By connecting the EBA switching contact to the indoor unit ( " 3‒
37 EBA switching contact connection" [
4
24]) and corresponding
parametrisation in its RoCon+ HP1 controller, an external switching
contact can be used to generate a heat request. If the switching
contact is closed, the indoor unit switches to heating operation. The
flow temperature is regulated to the temperature set in the [Feed
temperature,
heating mode] parameter [→ Main menu
→ Configuration → Heating].
The EBA switching contact has priority over a request from the room
thermostat.
The switching contact is not evaluated in cooling operation, standby,
manual or summer mode. The heating limits are also ignored.
3‒37 EBA switching contact connection