Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual page 54

8 Configuration
Schedule
Indicate if the room temperature is controlled according to a
schedule or not.
# Code
[1.1] N/A Schedule
▪ No: Room temperature is directly
controlled by the user.
▪ Yes: Room temperature is controlled
by a schedule and can be modified by
the user.
Heating schedule
Applicable for all models.
Define a heating schedule of the room temperature in [1.2] Heating
schedule .
Example" [ 4 52].
See "8.3.8 Schedule screen:
Cooling schedule
Only applicable for reversible models.
Define a cooling schedule of the room temperature in [1.3] Cooling
schedule.
Example" [ 4 52].
See "8.3.8 Schedule screen:
Antifrost
Room frost protection [1.4] prevents the room from getting too cold.
This setting behaves differently depending on the set unit control
method [2.9]. Perform actions according to the table below.
Main zone unit control
method [2.9]
Leaving water temperature
control
([C‑07]=0)
External room thermostat
control
([C‑07]=1)
Room thermostat control
([C‑07]=2)
INFORMATION
If a U4 error occurs, room frost protection is NOT
guaranteed.
For more detailed information about room frost protection in relation
to the applicable unit control method, see the sections below.
Leaving water temperature control ([C‑07]=0)
Under leaving water temperature control, room frost protection is
NOT guaranteed. However, if room antifrost [1.4] is activated, limited
frost protection by the unit is possible:
If...
Space heating/cooling is OFF
and the outdoor ambient
temperature drops below 4°C
Installer reference guide
54
Description
Description
Room frost protection is NOT
guaranteed.
Allow for the external room
thermostat to take care of room
frost protection:
▪ Set [C.2] Space heating/
cooling=On.
Allow for the user interface used as
room thermostat to take care of
room frost protection:
▪ Set antifrost [1.4.1]
Activation=Yes.
▪ Set the temperature of
antifrost function in [1.4.2] Room
setpoint.
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.
If...
Space heating/cooling is ON
and the operation mode is
"heating"
Space heating/cooling is ON
and the operation mode is
"cooling"
External room thermostat control ([C‑07]=1)
Under external room thermostat control, room frost protection is
guaranteed by the external room thermostat, provided that Space
heating/cooling [C.2] is turned ON and the emergency setting
[9.5] is set to automatic.
In case of one leaving water temperature zone:
If...
Space heating/cooling is OFF
and the outdoor ambient
temperature drops below 4°C
Space heating/cooling is ON,
the external room thermostat is
"Thermo OFF" and the outdoor
temperature drops below 4°C
Space heating/cooling is ON
and the external room thermostat
is "Thermo ON"
In case of two leaving water temperature zones:
If...
Space heating/cooling is OFF
and the outdoor ambient
temperature drops below 4°C
Space heating/cooling is ON,
the external room thermostat is
"Thermo OFF", the operation
mode is "heating" and the
outdoor temperature drops below
4°C
Space heating/cooling is ON
and the operation mode is
"cooling"
the
Room thermostat control ([C‑07]=2)
During room thermostat control, room frost protection [2‑06] is
guaranteed when activated. If so, 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
[1.4.1] [2-06]
[1.4.2] [2-05]
INFORMATION
When the user interface used as room thermostat is
disconnected (due to incorrect wiring or damage of the
cable), then room frost protection is NOT guaranteed.
Then...
The unit will supply leaving water
to the heat emitters to heat up
the room according to normal
logic.
There is no room frost protection.
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.
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.
Room frost protection is
guaranteed by the normal logic.
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.
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.
There is no room frost protection.
Description
Activation:
▪ 0 No: Antifrost functionality is OFF.
▪ 1 Yes: Antifrost functionality is on.
Room setpoint:
▪ 4°C~16°C
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10