Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual page 64

8 Configuration
Unit type
In this part of the menu it can be read out which type of unit is used:
# Code
[4.6] N/A Unit type:
▪ 1 Cooling only
▪ 2 Heating only
▪ 3 Reversible
Pump limitation
Pump speed limitation [9‑0D] defines the maximum pump speed. In
normal conditions, the default setting should NOT be modified. The
pump speed limitation will be overruled when the flow rate is in the
range of the minimum flow (error 7H).
# Code
[4.7] [9-0D] Pump limitation:
▪ 0: No limitation
▪ 1~4: General limitation. There is
limitation
required delta T control and comfort
are NOT guaranteed.
▪ 5~8: Limitation when no actuators.
When there is no heating output, the
pump speed limitation is applicable.
When there is heating output, the
pump speed is only determined by
delta T in relation to the required
capacity. With this limitation range,
delta T is possible and the comfort is
guaranteed.
The maximum values depend on the unit type:
[9-0D]=0
a (kPa)
b (l/min)
[9-0D]=6
a (kPa)
b (l/min)
Installer reference guide
64
Description
Description
in all conditions. The
[9-0D]=5
a (kPa)
b (l/min)
[9-0D]=7
a (kPa)
b (l/min)
[9-0D]=8
a (kPa)
b (l/min)
a External static pressure
b Water flow rate
Pump outside range
When the pump operation function is disabled the pump will stop if
the outdoor temperature is higher than the value set by the Space
heating off temperature [4‑02] or if the outdoor temperature
drops below the value set by the Space
temperature [F‑01]. When the pump operation is enabled, the
pump operation is possible at all outdoor temperatures.
# Code
[4.9] [F-00] Pump operation:
▪ 0: Disabled if outdoor temperature is
higher than [4‑02] or lower than [F‑01]
depending
operation mode.
▪ 1:
temperatures.
Increase around 0°C
Use this setting to compensate for possible heat losses of the
building due to the evaporation of melted ice or snow. (e.g. in cold
region countries).
In heating operation, the desired leaving water temperature is locally
increased around an outdoor temperature of 0°C.This compensation
can be selected when using an absolute or a weather dependent
desired temperature (see illustration below).
T T
t t
L L
R R
T
A
0°C 0°C
a b
a Absolute desired LWT
b Weather dependent desired LWT
# Code
[4.A] [D-03] Increase around 0°C
▪ 0: No
▪ 1: increase 2°C, span 4°C
▪ 2: increase 4°C, span 4°C
▪ 3: increase 2°C, span 8°C
▪ 4: increase 4°C, span 8°C
Overshoot
This function defines how much the water temperature may rise
above the desired leaving water temperature before the compressor
stops. The compressor will start up again when the leaving water
temperature drops below the desired leaving water temperature.
This function is ONLY applicable in heating mode.
cooling
Description
on heating/cooling
Possible at all outdoor
T
A
Description
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10
off