Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual page 66

8 Configuration
# Code
[5.7.2] [2‑00] Operation day
▪ 0: Every day
▪ 1: Monday
▪ 2: Tuesday
▪ 3: Wednesday
▪ 4: Thursday
▪ 5: Friday
▪ 6: Saturday
▪ 7: Sunday
Start time
[5.7.3] [2‑02]
[5.7.4] [2‑03] Tank setpoint
55°C~75°C
Duration
[5.7.5] [2‑04]
5~60 minutes
T
DHW
[2-03]
T
H
T
U
00.00 01.00 22.00
T Domestic hot water temperature
DHW
T User setpoint temperature
U
T High setpoint temperature [2-03]
H
t Time
WARNING
Be aware that the domestic hot water temperature at the
hot water tap will be equal to the value selected in field
setting [2-03] after a disinfection operation.
When the high domestic hot water temperature can be a
potential risk for human injuries, a mixing valve (field
supply) shall be installed at the hot water outlet connection
of the domestic hot water tank. This mixing valve shall
secure that the hot water temperature at the hot water tap
never rise above a set maximum value. This maximum
allowable hot water temperature shall be selected
according to the applicable legislation.
CAUTION
Be sure that the disinfection function start time [5.7.3] with
defined duration [5.7.5] is NOT interrupted by possible
domestic hot water demand.
CAUTION
BSH allowance schedule [9.4.2] is used to restrict or
allow booster heater operation based on a weekly
program. Advice: In
disinfection function, at least allow the booster heater (by
the weekly program) for minimum 4 hours starting from the
scheduled start-up of disinfection. If the booster heater is
restricted during disinfection, this function will NOT be
successful and the applicable warning AH will be
generated.
Installer reference guide
66
Description
[2-04]
23.00 24.00 t
[2-02]
order to avoid unsuccessful
NOTICE
Disinfection mode. Even if you turn OFF tank heating
operation ([C.3]: Operation > Tank), disinfection mode will
remain active. However, if you turn it OFF while
disinfection is running, an AH error occurs.
INFORMATION
In case of error code AH and no interruption of the
disinfection function occurred due to domestic hot water
tapping, following actions are recommended:
▪ When the Reheat only or Schedule + reheat mode
is selected, it is recommended to program the start-up
of the disinfection function at least 4 hours later than
the last expected large hot water tapping. This start-up
can be set by installer settings (disinfection function).
▪ When the Schedule
recommended to program an Eco action 3 hours before
the scheduled start-up of the disinfection function to
preheat the tank.
INFORMATION
Disinfection function is restarted in case the domestic hot
water temperature drops 5°C below the disinfection target
temperature within the duration time.
Maximum DHW temperature setpoint
The maximum temperature that users can select for the domestic
hot water. You can use this setting to limit the temperatures at the
hot water taps.
INFORMATION
During disinfection of the domestic hot water tank, the
DHW temperature can exceed this maximum temperature.
INFORMATION
Limit the maximum hot water temperature according to the
applicable legislation.
# Code
Maximum
[5.8] [6-0E]
The maximum temperature that users
can select for the domestic hot water.
You can use this setting to limit the
temperature at the hot water taps.
The maximum temperature is NOT
applicable during disinfection function.
See disinfection function.
Hysteresis
The following ON hysteresis can be set.
Heat pump ON hysteresis
Applicable when domestic hot water preparation is reheat only.
When the tank temperature drops below the reheat temperature
minus the heat pump ON hysteresis temperature, the tank heats up
to the reheat temperature.
The minimum ON temperature is 20°C, even if setpoint hysteresis is
smaller than 20°C.
# Code
[5.9] [6-00] Heat pump ON hysteresis
▪ 2°C~40°C
Reheat hysteresis
Applicable when domestic hot water preparation is scheduled
+reheat. When the tank temperature drops below the reheat
temperature minus the reheat hysteresis temperature, the tank heats
up to the reheat temperature.
only mode is selected, it is
Description
Description
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10