Weather-Controlled Flow Temperature Regulation; Legionella Protection; Reset To Factory Settings (Reset) - Rotex HPSU compact 304 Instruction Manual

3 x Operation

3.6.4 Weather-controlled flow temperature regulation

If the "Weather-controlled flow temperature regulation" is active,
the flow temperature is determined automatically in 
accordance with the set heating curve depending on the outside
temperature:
This function can be set only after the Technician password has
been input. Contact your specialist heating technician for this.
The weather-controlled flow temperature regulation is more ac-
curate with the optional external temperature probe RoCon OT1
( 15 60 70), which can be installed to the north of the building.
If, in addition, the room temperature controller (RoCon U1,
15 70 34) is connected to the ROTEX HPSU compact, the
set temperatures are regulated in a weather and room temper-
ature mode (see tab. 6-3 / tab. 6-15, Parameter [Room In-
fluence]).
If a mixer module is connected
The setting of the heating curve and the activation of the weather-
based infeed temperature regulation for the assigned heating
circuit is performed in the same way as described above.
The is the option of operating the assigned heating circuit as a
a) Mixer extension
The outside temperature determined by the outside
temperature sensor connected to the ROTEX HPSU compact
is transmitted to the mixer module via the CAN bus.
or as
b) mixer extension with zone regulation 
A separate outside temperature sensor (HPSU
compact OT1, 15 60 70) must be connected to the mixer
module. The assigned heating circuit is regulated by the rele-
vant outside temperature for this zone.
When the terminal function is activated, the mixer module is 
operated via the RoCon B1 control element of the ROTEX HPSU
compact, and the settings for the assigned heating circuit are per-
formed.
In connection with the room temperature controller RoCon U1
( 15 70 34), the mixer module can also autonomously control
the assigned heating circuit, fully independently of the ROTEX
HPSU compact.
If at the rotary switch setting
is displayed, the control unit has yet to be assigned a
valid terminal address.
If the message "n. A." is still displayed it may be nec-
essary to update the device software before the ter-
minal function can be used. Contact the ROTEX
Service Team for this.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in chapter 6.2.3 and 6.12.2.
24

3.6.5 Legionella protection

The ROTEX HPSU compact itself does not need this function 
because of the small volume of the internal drinking water heat
exchanger.
This function serves to prevent bacterial contamination in the hot
water storage tank. For accurate controllers for drinking water 
hygiene, refer to the national provisions.
This involves heating the connected storage tank to a disinfection
temperature 1 x a day or 1 x a week. The legionella protection
function is active for an hour.
Setting the parameters for legionella protection is carried out in
the rotary switch setting "Configuration"
Configuration".
Using the factory settings, the storage tank is charged at 03:30 if
the hot water temperature is below 65 °C at that time.
More detailed explanations and possible setting values for this function can be seen
in chapter 6.2.4.

3.6.6 Reset to factory settings (Reset)

If the ROTEX HPSU compact no longer works properly and any
other cause for the malfunction cannot be detected, it may be
helpful to reset all the controller settings to the factory settings.
There are 3 options for this.
Option 1
User status allows the switching time program in the "Special
Level" to be reset to the factory setting, according to tab. 3-7.
1. Depress the exit button for at least 5 secs.
2. Select the programme "Timeprog Reset" with the rotary
3. Execute the programme by briefly pressing on the rotary
the message "n. A."
4. Select "Return" with the rotary switch.
5. Confirm the changes with a brief push of the rotary switch.
Possibility 2
Technician status permits all customer-specific parameter
settings in the "Special Level" to be reset to the factory setting
according to tab. 6-1 to tab. 6-11.
Possibility 3
If fundamental changes to the ROTEX HPSU compact
equipment for the function within the RoCon system are nec-
essary, the Basic Configuration can be reset using Technician
status mode to the factory settings or can be redefined.
After a reset to the factory settings via option 2 or 3, the system
must be configured again by the heating technician to the instal-
lation environment and all the customer-specific parameters
reset.
The maximum hot water temperature set by the user or
the heating technician is ignored when hot water is
heated for disinfection purposes.
A connected circulation pump is automatically switched
off during thermal disinfection.

Menu "Special Level" is displayed.
switch.
switch.

The respective values are reset to the factory setting.
BA ROTEX HPSU compact 4 - 09/2013
in level "DHW