8 Configuration
Installer reference guide
59
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
In case of…
…then the following applies:
One leaving water temperature
zone
▪ When
the
leaving
water
temperature home page is
OFF and the outdoor ambient
temperature drops below 4°C,
then the unit will supply
leaving water to the heat
emitters to heat up the room
again, and the leaving water
temperature setpoint will be
lowered by 5°C.
▪ When
the
leaving
water
temperature home page is ON,
the external room thermostat
is "Thermo OFF" and the
outdoor ambient temperature
drops below 4°C, then the unit
will supply leaving water to the
heat emitters to heat up the
room again and the leaving
water temperature setpoint will
be lowered by 5°C.
▪ When
the
leaving
water
temperature home page is ON
and
the
external
room
thermostat is "Thermo ON",
then room frost protection is
guaranteed by the normal
logic.
Two leaving water temperature
zones
▪ When
the
leaving
water
temperature home page is
OFF, and the outdoor ambient
temperature drops below 4°C,
then the unit will supply
leaving water to the heat
emitters to heat up the room
again, and the leaving water
temperature setpoint will be
lowered by 5°C.
▪ When
the
leaving
water
temperature home page is ON,
the
operation
mode
is
"heating", and the outdoor
ambient temperature drops
below 4°C, then the unit will
supply leaving water to the
heat emitters to heat up the
room again, and the leaving
water temperature setpoint will
be lowered by 5°C.
▪ The selection of "cooling" or
"heating" is done via the user
interface. When the leaving
water temperature home page
is ON and the operation mode
is "cooling", then there is no
protection.
NOTICE
For the (limited) frost protection to be possible, auto
emergency MUST be set to Automatic ([A.5.1.2]=1).
[C‑07]=0: leaving water temperature control
Under leaving water temperature control, room frost protection is
NOT guaranteed. However, if [2‑06] is set to "1", limited frost
protection by the unit is possible:
▪ When the leaving water temperature home page is OFF and the
outdoor ambient temperature drops below 4°C, then the unit will
supply leaving water to the heat emitters to heat up the room
again, and the leaving water temperature setpoint will be lowered
by 5°C.
▪ When the leaving water temperature home page is ON and the
operation mode is "heating", then the unit will supply leaving water
to the heat emitters to heat up the room according to normal logic.
▪ When the leaving water temperature home page is ON and the
operation mode is "cooling", then there is no protection.
NOTICE
For the (limited) frost protection to be possible, auto
emergency MUST be set to Automatic ([A.5.1.2]=1).
Shut-off valve
The following is only applicable in case of 2 leaving water
temperature zones. In case of 1 leaving water temperature zone,
connect the shut-off valve to the heating/cooling output.
The shut-off valve, which is in the main leaving water temperature
zone, output is configurable.
INFORMATION
During defrost operation, the shut-off valve is ALWAYS
opened.
Thermo On/OFF: the valve closes, depending on [F-0B] when there
is no heating demand from the main zone. Enable this setting to:
▪ avoid leaving water supply to the heat emitters in the main LWT
zone (through the mixing valve station) when there is request from
the additional LWT zone.
▪ activate the On/OFF pump of the mixing valve station ONLY when
"5 Application guidelines" on page 10
.
#
Code
Description
[A.3.1.1.6.1] [F-0B]
The shut-off valve:
▪ 0 (No)(default): is NOT influenced by
heating or cooling demand.
▪ 1 (Yes): closes when there is NO
heating or cooling demand.
INFORMATION
The setting [F‑0B] is only valid when there is a thermostat
or external room thermostat request setting (NOT in case
of leaving water temperature setting).
Cooling: ONLY applicable for RHBX and RHVX. The shut-off valve
closes, depending on [F-0C] when the unit is running in cooling
operation mode. Enable this setting to avoid cold leaving water
through the heat emitter and the forming of condensation (e.g. under
floor heating loops or radiators).
#
Code
Description
[A.3.1.1.6.2] [F-0C]
The shut-off valve:
▪ 0 (No): is NOT influenced by changing
the space operation mode to cooling.
▪ 1 (Yes)(default): closes when the
space operation mode is cooling.
Operation range
Depending on the average outdoor temperature, the operation of the
unit in space heating or space cooling is prohibited.
Space heating OFF temp: When the averaged outdoor temperature
raises above this value, space heating is turned OFF to avoid
overheating.
