Rotex R2CND028A4AA Operation Manual Download Page 6

3 Operation

Operation manual

6

R0 R035A4AA

Wall-mounted condensing boiler

3P469438-6D – 2017.07

To change the domestic hot water setpoint

1

Turn  the  right  dial  while  you  are  at  the  home  screen.  The
setpoint  screen  will  appear  as  shown  below  and  the  setpoint
can  be  adjusted  by  turning  the  right  dial. 

Note: 

The    icon

means you are at the setpoint screen.

2

To apply changes done, wait for 3 seconds or press the "Enter"
button. Pressing the "Cancel" button cancels the changes done.

NOTICE

To  be  able  to  change  the  setpoint  of  central  heating  or
domestic  hot  water,  the  corresponding  operation  mode
must  be  enabled.  If  it  is  not,  the  related  dial  has  no
function.

3.3.5

Possible central heating operation modes

Mode

Description

Boiler only

The case that the system only
contains the boiler. No room
thermostat or outdoor sensor are
connected. The central heating water
temperature setpoint is displayed. The
setpoint can be adjusted with the left
dial.

The   icon is shown on the screen
when the central heating operation
mode is enabled.

Combination with ROTEX
Opentherm room
thermostat (DOTT )

The case that ROTEX Opentherm
room thermostat is connected to the
boiler. Room temperature setpoint is
displayed. The room temperature
setpoint can be adjusted from the user
interface by means of the left dial or
from the ROTEX room thermostat.

The   icon is shown on the screen
instead of the   icon when central
heating operation mode is enabled.

Mode

Description

outdoor sensor
(Weather compensation)

The case that outdoor sensor is
connected to the boiler. In this case,
the central heating water temperature
is regulated according to the outdoor
temperature. The virtual room
temperature setpoint is diplayed. The
virtual room temperature setpoint can
be adjusted by means of left dial.
Increasing or decreasing the setpoint
value reflects to the central heating
water temperature and the room
temperature, respectively.

The   and   icons are shown on the
screen when central heating operation
mode is enabled.

NOTICE

To enable weather compensation, the heating slope value
must  be  higher  than  "5"  (see 

"User  settings  menu:

Parameters (short)" on page 8

).

INFORMATION

If  an  outdoor  sensor  is  connected  to  the  boiler  together
with  an  Opentherm  room  thermostat  (whether  DOTT  or
not),  the  rules  of  the  case  "Combination  with  Opentherm
room  thermostat"  are  applicable.  The  outdoor  sensor  only
provides outdoor temperature data to the room thermostat
for water temperature calculation.

3.3.6

About the central heating ECO mode

The  central  heating  ECO  mode  provides  more  economic  central
heating.  Main  purpose  of  the  ECO  mode  is  to  operate  the  boiler  at
the  condensing  temperature  range  so  to  increase  the  efficiency.
ECO mode can be activated at any central heating operation mode
explained above.

ECO mode can be enabled from the user settings menu (see 

"User

settings menu: Parameters (short)" on page 8

).

INFORMATION

ECO  mode  is  only  for  central  heating,  it  has  no  effect  to
domestic water heating.

When central heating ECO mode is enabled,   icon is shown on the
screen while the central heating operation mode is enabled.

3.3.7

About the domestic hot water operation

This  unit  supplies  domestic  hot  water  by  way  of  a  plate  heat
exchanger  (instantaneous)  or  by  way  of  a  hot  water  storage  tank
according to model of the boiler.

If  the  boiler  is  instantaneous  type,  domestic  hot  water  operation  is
activated  when  water  is  being  tapped.  Water  flow  rate  must  be  at
least 2.5 l/min.

If  it  is  storage  tank  type,  domestic  hot  water  operation  is  activated
according to storage tank temperature value.

The   icon blinks when domestic hot water operation is active.

INFORMATION

Domestic  hot  water  operation  mode  must  be  enabled  for
the  boiler  to  be  able  to  produce  domestic  hot  water.  (i.e.
summer mode or winter mode).

Summary of Contents for R2CND028A4AA

Page 1: ...Operation manual Wall mounted condensing boiler English Operation manual Wall mounted condensing boiler R2CND028A4AA R2CND035A4AA R2TND028A4AA R2TND035A4AA...

Page 2: ...pply Filling loop R2CND028A4AA R2CND028 Instantaneous External R2CND035A4AA R2CND035 Instantaneous External Model Type Domestic hot water supply Filling loop R2TND028A4AA R2TND028 Storage tank Externa...

Page 3: ...Do not damage or remove any seals on components Only qualified persons are allowed to alter sealed components Do not make any modifications on Boiler Gas water or power supply Flue system 2 4 Gas con...

Page 4: ...oiler Status Description Standby When there is no heat demand the status indicator shows this with a kind of breathing pulsation of the blue and white LED Flame At the moment flame ignites for central...

Page 5: ...ater operation is active Operation mode Description Winter mode Both domestic hot water operation mode and central heating operation mode are enabled The boiler can produce domestic hot water as well...

Page 6: ...dial Increasing or decreasing the setpoint value reflects to the central heating water temperature and the room temperature respectively The and icons are shown on the screen when central heating oper...

Page 7: ...ling When an error occurs the normal behaviour of the user interface is interrupted and the status of the status indicator is affected However be aware that not all errors have the same effect on the...

Page 8: ...dependency 1 1 2 or 24 U10 Room temperature setpoint used by ROTEX Opentherm room thermostat during night C 18 10 30 User settings menu Parameters detailed Description U00 When using outdoor sensor ab...

Page 9: ...of your boiler with a damp cloth and a little solvent free soap CAUTION Sprays solvents or cleaning agents containing chlorine can damage the exterior the fittings or the control unit Do not use them...

Page 10: ...eeded If problem repeats contact your service agent E1 66 Calibration conditions fault No reset needed Wait burner to restart If problem repeats contact your service agent E1 67 Missing calibration Pe...

Page 11: ...Solution UA 66 BCC ID of internal EEPROM is inconsistent Contact your service agent UA 67 BCC is missing Contact your service agent UA 68 BCC is not compatible with PCB BCC ID Contact your service ag...

Page 12: ...usland Our partners abroad Unsere Partner im Ausland Nos partenaires l tranger Le nostre sedi all estero Neustros representantes en el extranjero Nasi partnerzy za granic Na i partne i v zahrani http...

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