Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual page 75

Sensors
External sensor
# Code
[9.B.1] [C–08] External sensor : When an optional
external ambient sensor is connected,
the type of the sensor must be set.
▪ 0 None : NOT installed. The thermistor
in the user interface and in the outdoor
unit are used for measurement.
▪ 1 Outdoor: Connected to PCB of the
indoor unit measuring the outdoor
temperature.
functionality, the temperature sensor
in the outdoor unit is still used.
▪ 2 Room: Connected to PCB of the
indoor unit measuring the indoor
temperature. The temperature sensor
in the user interface is NOT used
anymore. Remark: This value has
only meaning in room thermostat
control.
Ext. amb. sensor offset
ONLY applicable in case an external outdoor ambient sensor is
connected and configured.
You can calibrate the external outdoor ambient temperature sensor.
It is possible to give an offset to the thermistor value. This setting
can be used to compensate for situations where the external outdoor
ambient sensor cannot be installed on the ideal installation location.
# Code
[9.B.2] [2-0B] Ext. amb. sensor offset: Offset on
the ambient temperature measured on
the external outdoor temperature sensor.
▪ –5°C~5°C, step 0.5°C
Averaging time
The average timer corrects the influence of ambient temperature
variations. The weather-dependent setpoint calculation is done on
the average outdoor temperature.
The outdoor temperature is averaged over the selected time period.
# Code
[9.B.3] [1-0A] Averaging time:
▪ 0: No averaging
▪ 1: 12 hours
▪ 2: 24 hours
▪ 3: 48 hours
▪ 4: 72 hours
Bivalent
Bivalent
Only applies to indoor unit installations with an auxiliary boiler
(alternating operation, connected in parallel). The purpose of
bivalent operation is to determine which heating source can/will
provide the space heating, either the indoor unit or an auxiliary
boiler.
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10
Description
Remark: For some
Description
Description
# Code
[9.C.1] [C-02] Bivalent: Indicates if the space heating
is also performed by means of another
heat source than the system.
▪ 0 No: Not installed
▪ 1 Yes: Installed. The auxiliary boiler
(gas boiler, oil burner) will operate
when the outdoor ambient temperature
is low. During bivalent operation, the
heat pump is turned off. Set this value
in case an auxiliary boiler is used.
▪ If Bivalent is enabled: When the outdoor temperature drops
below the bivalent ON temperature (fixed or variable based on
energy prices), the space heating by the indoor unit stops
automatically and the permission signal for the auxiliary boiler is
active.
▪ If Bivalent is disabled: Space heating is only done by the indoor
unit within the operation range. The permission signal for the
auxiliary boiler is always inactive.
INFORMATION
▪ The combination of setting [4‑03]=0/2 with bivalent
operation at low outdoor temperature can result in
domestic hot water shortage.
▪ The bivalent operation function has no impact on the
domestic water heating mode. The domestic hot water
is still and only heated by the indoor unit.
▪ The permission signal for the auxiliary boiler is located
on the EKRP1HBAA (digital I/O PCB). When it is
activated, the contact X1, X2 is closed and open when
it is deactivated. See illustration below for the
schematic location of this contact.
X2M
X1M
YC Y1 Y2 Y3 Y4
Boiler efficiency
Depending on the used boiler, this should be chosen as follows:
# Code
[9.C.2] [7‑05] ▪ 0: Very high
▪ 1: High
▪ 2: Medium
▪ 3: Low
▪ 4: Very low
Possibility 1: Based on the outdoor temperature
Set all electricity prices ([7.5.1]~[7.5.3]) to "0" in the menu structure.
Also set the following values:
NOTICE
Do NOT use overview settings!
8 Configuration
Description
OFF ON
SS1
Description
Installer reference guide
75