Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual page 76

8 Configuration
# Code
[9.C.3] [C-03] Bivalent ON temperature: Defines the
outdoor temperature below which the
permission signal for the auxiliary boiler
is active (X1 and X2 on EKRP1HBAA is
closed) and space heating by indoor unit
is stopped.
[9.C.4] [C-04] Hysteresis: Defines the temperature
difference between the ON temperature
and the OFF temperature.
Permission signal X1–X2
a
[C-04]
b
T
A
[C-03]
T Outdoor temperature
A
[C-03] Bivalent ON temperature (fixed)
a Auxiliary boiler active
b Auxiliary boiler inactive
Possibility 2: Based on the outdoor temperature and energy prices
The installer can set a temperature range [C‑04]. Depending on the
energy prices, a calculated point T
[C‑03] and [C‑03]+[C‑04]. It is recommended to choose [C‑04] bigger
than the default value to have an optimal operation when choosing
possibility 2.
Electricity and gas prices
# Code
Electricity price > High
[7.5.1] N/A
[7.5.2] N/A Electricity price > Medium
[7.5.3] N/A Electricity price > Low
[7.6] N/A Gas price
INFORMATION
Electricity price can only be set when bivalent is ON
([9.C.1] or [C-02]). These values can only be set in menu
structure [7.5.1], [7.5.2] and [7.5.3]. Do NOT use overview
settings.
When the outdoor temperature reaches below the T
the permission signal for the auxiliary boiler becomes active. To
prevent too much switching, there is a hysteresis of 3°C.
# Code
[9.C.3] [C-03] Bivalent ON temperature: Below this
temperature bivalent operation will
always be ON.
[9.C.4] [C-04] Operation range between which T
calculated.
Permission signal X1–X2 (EKRP1HBAA)
3°C
a
b
T [C-03]+[C-04]
[C-03] calc
T
A
T Outdoor temperature
A
T Bivalent ON temperature (variable). Below this
calc
temperature, the auxiliary boiler will always be ON. T
never go below [C‑03] or above [C‑03]+[C‑04].
a Auxiliary boiler active
b Auxiliary boiler inactive
Installer reference guide
76
Description
varies within a range between
calc
Description
point, then
calc
Description
is
calc
can
calc
CAUTION
Make sure to observe all rules mentioned in application
guideline 5 when bivalent operation function is enabled.
ROTEX shall NOT be held liable for any damage resulting
from failure to observe this rule.
Alarm output
Alarm output
# Code
[9.D] [C–09] Alarm output: Indicates the logic of the
alarm output on the digital I/O PCB
during malfunctioning.
▪ 0 Abnormal: The alarm output will be
powered when an alarm occurs. By
setting this value, a distinction is made
between the detection of an alarm,
and the detection of a power failure.
▪ 1 Normal: The alarm output will NOT
be powered when an alarm occurs.
See also table below (Alarm output
logic).
Alarm output logic
[C-09] Alarm
0 Closed output
1 Open output
Auto restart
Auto restart
When power returns after a power supply failure, the auto restart
function reapplies the remote controller settings at the time of the
power failure. Therefore, it is recommended to always enable the
function.
If the preferential kWh rate power supply is of the type that power
supply is interrupted, always enable the auto restart function.
Continuous indoor unit control can be guaranteed independent of the
preferential kWh rate power supply status, by connecting the indoor
unit to a normal kWh rate power supply.
# Code
[9.E] [3-00] Auto restart:
▪ 0: Manual
▪ 1: Automatic
Power saving function
Power saving function
Defines whether the outdoor unit power supply can be interrupted
(internally by indoor unit control) during stand-still conditions (no
space heating/cooling nor domestic hot water demand). The final
decision to allow power interruption of the outdoor unit during
standstill depends on the ambient temperature, compressor
conditions and minimum internal timers.
To enable the power saving function setting, [E‑08] needs to be
enabled on the user interface.
# Code
Power saving function for outdoor
[9.F] [E‑08]
unit:
▪ 0: No
▪ 1: Yes
Description
No alarm No power
supply to unit
Open output Open output
Closed output
Description
Description
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10