8 Configuration
Installer reference guide
62
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
#
Code
Description
N/A
[4-03]
Defines the operation permission of the
booster heater depending on ambient,
domestic hot water temperature or
operation mode of heat pump. This
setting is only applicable in reheat mode
for applications with separate domestic
hot water tank.
▪ 0: Booster heater operation is NOT
allowed
except
for
"Disinfection
function" and "Powerful domestic
water heating".
Only use this in case the capacity of
the heat pump can cover the heating
requirements of the house and
domestic hot water over the complete
heating season.
If the outdoor temperature is below
setting [5-03] and [5-02]=1, the
domestic hot water will not be heated.
The domestic hot water temperature
can be maximum the heat pump OFF
temperature.
▪ 1: Booster heater operation is allowed
when required.
▪ 2: The booster heater is allowed
outside the operation range of the heat
pump
for
domestic
hot
water
operation.
Booster heater operation is only
allowed if:
▪ Ambient temperature is out of the
operating
range:
T
a
<[5-03]
or
T
a
>35°C
▪ Domestic hot water temperature is
2°C lower than the heat pump OFF
temperature.
continued >>
#
Code
Description
N/A
[4-03]
<< continuation
The booster heater will be allowed to
operate when T
a
<[5-03] depends of the
status of [5-02].
If bivalent operation is enabled and
permission signal for auxiliary boiler is
ON, the booster heater will be restricted
even when T
a
<[5-03]. See [C-02].
▪ 3 (default): The booster heater is
allowed when the heat pump is NOT
active in domestic hot water operation.
Same as setting 1, but simultaneous
heat
pump
domestic
hot
water
operation
and
booster
heater
operation is not allowed.
When setting [4-03]=1/2/3, the booster
heater operation can still be restricted by
the booster heater allowance schedule.
N/A
[7-00]
Overshoot temperature. Temperature
difference above the domestic hot water
set point temperature before the booster
heater is turned OFF. The domestic hot
water tank temperature will increase with
[7-00] above selected temperature
set point.
Range: 0°C~4°C (default: 0°C)
#
Code
Description
N/A
[7-01]
Hysteresis. Temperature difference
between booster heater ON and booster
heater OFF temperature. The minimum
hysteresis temperature is 2°C.
Range: 2°C~40°C (default: 2°C)
N/A
[6-00]
The temperature difference determining
the heat pump ON temperature.
Range: 2°C~20°C (default: 2°C)
N/A
[6-01]
The temperature difference determining
the heat pump OFF temperature.
Range: 0°C~10°C (default: 2°C)
t
T
BH ON
T
DHW
T
HP ON
T
HP OFF
T
HP MAX
T
U
T
BH OFF
[6-01]
[6-00]
[7-00]
[7-01]
T
U
= 70°C
[7-00] = 3°C
[6-01] = 2°C
[6-00] = 7°C
HP
BH
HP
5
10
20
30
40
41
48
50
60
71
70
73
BH
Booster heater
HP
Heat pump. If heating up time by the heat pump takes too
long, auxiliary heating by the booster heater can take place
T
BH OFF
Booster heater OFF temperature (T
U
+[7-00])
T
BH ON
Booster heater ON temperature (T
BH OFF
−[7-01])
T
HP MAX
Maximum heat pump temperature at sensor in domestic
hot water tank
T
HP OFF
Heat pump OFF temperature (T
HP MAX
−[6-01])
T
HP ON
Heat pump ON temperature (T
HP OFF
−[6-00])
T
DHW
Domestic hot water temperature
T
U
User set point temperature (as set on the user interface)
t
Time
Timers for simultaneous request space and domestic hot water
operation
#
Code
Description
N/A
[8-00]
Do not change. (default: 1)
N/A
[8-01]
Maximum running time for domestic hot
water operation. Domestic hot water
heating stops even when the target
domestic hot water temperature is NOT
reached. The actual maximum running
time also depends on setting [8-04].
▪ When
system
layout
=
Room
thermostat control: This preset value is
only taken into account if there is a
request for space heating or cooling. If
there is NO request for space heating/
cooling, the tank is heated until the
setpoint has been reached.
▪ When
system
layout
≠
Room
thermostat control: This preset value is
always taken into account.
Range: 5~95 minutes (default: 30)
