8 Configuration
Installer reference guide
58
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
#
Code
Description
[A.3.2.4]
N/A
Room temp. step
▪ 1°C (default). The desired room
temperature on the user interface is
settable per 1°C.
▪ 0.5°C. The desired room temperature
on the user interface is settable per
0.5°C. The actual room temperature is
displayed with an accuracy of 0.1°C.
Room temperature hysteresis
ONLY applicable in case of room thermostat control. The hysteresis
band around the desired room temperature is settable. It is
recommended NOT to change the room temperature hysteresis as it
is set for an optimal use of the system.
[9-0C]
a
b
c
d
a
Room temperature
b
Actual room temperature
c
Desired room temperature
d
Time
#
Code
Description
N/A
[9-0C]
1°C~6°C (default: 1°C)
Room temperature offset
ONLY applicable in case of room thermostat control. You can
calibrate the room temperature sensor. It is possible to give an offset
to the room thermistor value measured by the user interface. The
settings can be used to compensate for situations where the user
interface CANNOT be installed on the ideal installation location (see
installation manual and/or installer reference guide).
#
Code
Description
Room temp. offset: Offset on the actual room temperature
measured on the user interface sensor.
[A.3.2.2]
[2-0A]
–5°C~5°C, step 0.5°C (default: 0°C)
Room frost protection
Room frost protection prevents the room from getting too cold. This
setting behaves differently depending on the set unit control method
([C‑07]). Perform actions according to the table below:
Unit control method ([C‑07])
Room frost protection
Room thermostat control
([C‑07]=2)
Allow for the room thermostat to
take care of room frost
protection:
▪ Set [2‑06] to "1"
▪ Set
the
room
antifrost
temperature ([2‑05]).
External room thermostat control
([C‑07]=1)
Allow for the external room
thermostat to take care of room
frost protection:
▪ Turn ON the leaving water
temperature home page.
▪ Set auto emergency ([A.5.1.2])
to "1".
Leaving water temperature
control ([C‑07]=0)
Room frost protection is NOT
guaranteed.
NOTICE
If the system does NOT contain a backup heater, do NOT
change the default room antifrost temperature.
INFORMATION
If an U4 error occurs, room frost protection is NOT
guaranteed.
Refer to the sections below for detailed information on room frost
protection in relation to the applicable unit control method.
[C‑07]=2: room thermostat control
Under room thermostat control, room frost protection is guaranteed,
even if the room temperature home page is OFF on the user
interface. When room frost protection ([2‑06]) is enabled and the
room temperature drops below the room antifrost temperature
([2‑05]), the unit will supply leaving water to the heat emitters to heat
up the room again.
#
Code
Description
N/A
[2-06]
Room frost protection
▪ 0: disabled (default)
▪ 1: enabled
N/A
[2-05]
Room antifrost temperature
4°C~16°C (default: 12°C)
INFORMATION
If an U5 error occurs:
▪ when 1 user interface is connected, room frost
protection is NOT guaranteed,
▪ when 2 user interfaces are connected and the second
user interface used for room temperature control is
disconnected (due to miswiring, damage of the cable),
then room frost protection is NOT guaranteed.
NOTICE
If Emergency is set to Manual ([A.5.1.2]=0), and the unit is
triggered to start emergency operation, the user interface
will ask confirmation before starting. Room frost protection
is active even if the user does NOT confirm emergency
operation.
[C‑07]=1: external room thermostat control
Under external room thermostat control, room frost protection is
guaranteed by the external room thermostat, provided that the
leaving water temperature home page is ON on the user interface,
and the auto emergency setting ([A.5.1.2]) is set to "1".
Additionally, limited frost protection by the unit is possible:
