8 Configuration
Installer reference guide
66
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
T
calc
Calculated temperature
a
Closed
b
Open
#
Code
Description
N/A
[C-03]
Range: –25°C~25°C (default: 0°C) (step:
1°C)
N/A
[C-04]
Range: 2°C~10°C (default: 3°C) (step:
1°C)
It is recommended to choose [C‑04] bigger than the default value to
have an optimal operation when choosing possibility 2. Depending
on the used boiler, the boiler efficiency should be chosen as follows:
#
Code
Description
[A.6.A]
[7‑05]
▪ 0: Very high
▪ 1: High
▪ 2: Medium
▪ 3: Low
▪ 4: Very low
INFORMATION
Electricity price can only be set when bivalent is ON
([A.2.2.6.1] or [C-02]). These values can only be set in
menu structure [7.4.5.1], [7.4.5.2] and [7.4.5.3]. Do NOT
use overview settings.
INFORMATION
Boiler efficiency [A.6.A] or [7‑05] becomes visible when
bivalent is ON ([A.2.2.6.1] or [C‑02]).
CAUTION
Make sure to observe all rules mentioned in application
guideline 5 when bivalent operation function is enabled.
ROTEX shall NOT be held liable for any damage resulting
from failure to observe this rule.
INFORMATION
▪ The combination of setting [4‑03]=0/2 with bivalent
operation at low outdoor temperature can result in
domestic hot water shortage.
▪ The bivalent operation function has no impact on the
domestic water heating mode. The domestic hot water
is still and only heated by the indoor unit.
▪ The permission signal for the auxiliary boiler is located
on the EKRP1HB (digital I/O PCB). When it is
activated, the contact X1, X2 is closed and open when
it is deactivated. See illustration below for the
schematic location of this contact.
YC Y1 Y2 Y3 Y4
X1
X2
X3
X4
OFF ON
X2M
SS1
X1M
8.3.4
System settings
Priorities
For systems with separate domestic hot water tank (only for
RHBH/X
)
#
Code
Description
N/A
[5-02]
Space heating priority.
Defines whether domestic hot water is
made by booster heater only when
outdoor temperature is below space
heating priority temperature. It is
recommended to enable this function to
shorten tank heating operation time
and guaranteed domestic hot water
comfort.
▪ 0: disabled
▪ 1: enabled
[5‑01] Equilibrium temperature and
[5‑03] Space heating priority
temperature are related to backup
heater. So, you must set [5‑03] equal or
a few degrees higher than [5‑01].
N/A
[5-03]
Space heating priority temperature.
Defines the outdoor temperature which
below the domestic hot water will be
heated by booster heater only.
Range: –15°C~35°C (default: 0°C).
N/A
[5-04]
Set point correction for domestic hot
water temperature: set point correction
for the desired domestic hot water
temperature, to be applied at low
outdoor temperature when space
heating priority is enabled. The
corrected (higher) set point will make
sure that the total heat capacity of the
water in the tank remains
approximately unchanged, by
compensating for the colder bottom
water layer of the tank (because the
heat exchanger coil is not operational)
with a warmer top layer.
Range: 0°C~20°C (default: 10°C).
N/A
[C-01]
If there is a simultaneous demand for
space heating/cooling and domestic hot
water heating (by heat pump), which
operation mode has priority?
▪ 0: The operation mode with the
highest request has priority.
▪ 1: Always space heating/cooling has
priority.
For systems with an integrated domestic hot water tank (only
for
RHVH/X
)
