Buderus RC35 User guide

For qualified profes-
sionals
Please read carefully
prior to commission-
ing and servicing
Installation and
servicing instructions
Programming unit
RC35
7 747 006 341  12/2006 GB

Contents
RC35 programming unit - Technical specifications are subject to change without prior notice.
2
Contents
Contents 2
1 Safety instructions and symbols 4
1.1 Safety instructions and explanation of symbols . . . . . . . . . . . . . . 4
1.2 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Information about the product 6
2.1 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 EU Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Included in delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.5 Validity of these instructions for function modules (accessories) . . . . . 8
2.6 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3Installation 9
3.1 Choosing the right installation position . . . . . . . . . . . . . . . . . . 9
3.1.1 Installation in reference room . . . . . . . . . . . . . . . . . . . . 9
3.1.2 Installation on boiler . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Types of installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Installation and connection . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Attaching or removing the programming unit . . . . . . . . . . . . . . 12
4 Operating basics 13
4.1 Overview of operation . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Introduction to the Service menu . . . . . . . . . . . . . . . . . . . . . 14
4.3 Overview of the Service menu . . . . . . . . . . . . . . . . . . . . . . 16
5 Commissioning 17
5.1 General commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Checklist: important parameters for commissioning . . . . . . . . . . . 18
5.3 Quick commissioning (Quick operation menu) . . . . . . . . . . . . . 19
5.4 Detailed commissioning . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.5 System handover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.6 Shut-down / switching off . . . . . . . . . . . . . . . . . . . . . . . . 21
5.7 Operating tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Contents
RC35 programming unit - Technical specifications are subject to change without prior notice. 3
6 Entering system settings (Service menu – Settings) 22
6.1 System data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1.1 Building type ("damping" of outside temperature) . . . . . . . . 23
6.1.2 Minimum ("lowest expected") outside temperature . . . . . . . . 24
6.2 Boiler data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.3 Heating circuit data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.3.1 Assignment of programming unit / remote control
unit in the software . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.3.2 Control mode (outside temp. controlled / room influence) . . . . 30
6.3.3 Heating characteristics . . . . . . . . . . . . . . . . . . . . . . . 31
6.3.4 Reduction modes (night setback) . . . . . . . . . . . . . . . . . 32
6.3.5 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.4 Domestic hot water (DHW) . . . . . . . . . . . . . . . . . . . . . . . . 35
6.5 Solar data (not with UBA1.x) . . . . . . . . . . . . . . . . . . . . . . . 37
6.6 RC35 calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.7 Contact data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7 Diagnosis 40
7.1 Function test (not with UBA1.x) . . . . . . . . . . . . . . . . . . . . . . 40
7.2 Monitor value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.3 Error message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.4 Htg. charact. curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.5 Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8 Servicing 43
9 Reset 44
10 Troubleshooting 45
Index 51

Safety instructions and symbols
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RC35 programming unit - Technical specifications are subject to change without prior notice.
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1 Safety instructions and symbols
1.1 Safety instructions and explanation of symbols
Installation and commissioning
zObserve all instructions to ensure satisfactory operation.
zInstallation and commissioning must only be carried out by qualified system installers.
Use
zAlways use this device correctly and in conjunction with the stated control systems.
zThis device must not be used with control systems using the UBA-H3 controller.
zObserve all regulations and standards applicable to installation and operation of the
system in your country.
Read and observe the safety information and instructions:
Risk of death from electric shock
zThe electrical supply must be connected by a qualified electrician. The terminal diagram
must be followed.
zBefore installation: isolate all poles of the power supply (230 V AC). Undertake meas-
ures to prevent power from being switched back on unintentionally.
zDo not install this device in rooms with high moisture exposure (e.g. bathrooms, sau-
nas).
zNever connect this device to the 230 V power mains.
Warning: frost
The heating system can freeze up in cold weather, if switched off.
zLeave the heating system permanently switched on.
zSwitch on frost protection.
zIn the event of a fault: remedy the fault immediately.

Safety instructions and symbols 1
RC35 programming unit - Technical specifications are subject to change without prior notice. 5
1.2 Explanation of symbols
The terms indicate the seriousness of the ensuing risk if measures for minimising damage
are not taken.
–Caution means that minor property damage may occur.
–Warning means that minor injury or severe property damage may occur.
–Danger means that severe injury may occur. Very serious cases may result in death.
Notes contain important information for situations in which there is no risk to the user or
the device.
Display text: Words appearing on the display are shown in bold
in the text.
Example: USER MENU
Action sequences: Each step in an action sequence is marked with a bullet point.
Example: Press .
If action sequences have more than two steps and the order of the steps is important, they
are numbered (1., 2., ...).
Safety instructions throughout the text are indicated by a warning triangle in-
side a rectangular frame.
Notes throughout the text are identified with this symbol. They are bounded by
horizontal lines above and below the text.
Note on using this manual: Section 4.2 "Introduction to the Service menu"
explains in detail the steps needed for programming all the settings in the Serv-
ice menu. In the sections which come after it, programming is only explained in
outline.
standard display
operation modes
switching programme
sum./win. threshold
USER MENU

Information about the product
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RC35 programming unit - Technical specifications are subject to change without prior notice.
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2 Information about the product
2.1 Correct use
The RC35 programming unit must only be used to operate and control Buderus heating
systems in residential buildings.
The boiler must be equipped with EMS (energy management system) or UBA1.x (univer-
sal burner control).
The programming unit must not be used in conjunction with Logamatic 2000/4000 con-
trol panels.
We recommend that the heating system is always operated with a programming unit (only
emergency operation is possible without a programming unit).
If RC20 remote control units manufactured before 2006 are being used, only two remote
control units can be connected. If you have any questions about this, please contact your
local Buderus office.
2.2 EU Declaration of Conformity
2.3 Included in delivery
– RC35 programming unit
– Operating instructions
– Installation and servicing instructions
– Wall bracket, mounting materials
The design and operation of this product conforms to European Directives
and the supplementary national requirements. Its conformity is confirmed by
the CE marking. You can view the Declaration of Conformity on the internet
at www.buderus.de/konfo or request a copy from your local Buderus office.

Information about the product 2
RC35 programming unit - Technical specifications are subject to change without prior notice. 7
2.4 Specifications
Temperature sensor characteristics
When measuring temperature sensor resistance, observe the following requirements:
– Isolate the system before measuring.
– Measure the resistance at the cable ends.
– The resistances represent mean values and are subject to tolerances.
Unit RC35
Power supply via bus system V16VDC
Power consumption W0.3
Power consumption with backlighting W0.6
Dimensions (width/height/depth) mm 150/90/32
Weight g233
Operating temperature °C 0 to +50
Storage temperature °C 0 to +70
Relative humidity %0to90
CE marking
Table 1 Specifications for the RC35 programming unit
Outside temperature sensor
Boiler/flow temperature sensor
DHW temperature sensor
°C kΩ°C kΩ°C kΩ
-20 96.358 10 19.872 60 2.49
-15 72.51 16 15.699 65 2.084
-10 55.054 20 12.488 70 1.753
-5 42.162 25 10.001 75 1.481
±0 32.556 30 8.060 80 1.256
525.339
35 6.535 85 1.070
10 19.872 40 5.331 90 0.915
15 15.699 45 4.372 95 0.786
20 12.488 50 3.606 100 0.677
25 10.001 55 2.989
30 8.060
Table 2 Resistances of the temperature sensors, for EMS only

Information about the product
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RC35 programming unit - Technical specifications are subject to change without prior notice.
8
2.5 Validity of these instructions for function modules (accesso-
ries)
These instructions also apply to the programming unit when used in conjunction with the
MM10 mixer module and the WM10 low loss header module.
If the heating system is equipped with other function modules (e.g. SM10 solar module),
you will find additional setting options in some menus. These are described in separate
instructions.
2.6 Accessories
For precise information regarding suitable accessories, refer to the catalogue.
– MM10 mixer module1for controlling a three-way mixing valve. The instructions for the
MM10 form part of the RC35 instructions.
– WM10 low loss header module1for operating a hydraulic separator
– Solar module and other EMS modules (e.g. ASM10 connection module)1
– Remote control unit1(e.g. RC20/RC20RF) for controlling a particular heating circuit
– Outside temperature sensor, external room temperature sensor
1) The use of modules is not possible with boilers with UBA1.x and DBA.

Installation 3
RC35 programming unit - Technical specifications are subject to change without prior notice. 9
3 Installation
3.1 Choosing the right installation position
3.1.1 Installation in reference room
If the system is room-temperature controlled, the following requirements must be
observed:
– Installation position on an internal wall (Fig. 1)
– Maintain the specified distance from the door(s) (to avoid draughts).
– Allow clearance below the programming unit (Fig. 1, shaded area) (to ensure correct
temperature measurement).
– The reference room (= installation room) must be as representative as possible of the
entire home. External heat sources in the reference room (like sunlight or other heat
sources such as an open fire) affect the control's function. This means it may be too
cold in rooms without external heat sources.
– The thermostatic valves on the radiators in the reference room must always stay fully
open so that the two temperature controls do not affect one another.
Fig. 1 Minimum clearances for installation in a reference room
If there is no suitable reference room, we recommend setting the system to out-
side temperature control instead (this requires an outside sensor). Alternatively
you could install an external room sensor in the room with the greatest heating
requirements (e.g. living room).

Installation
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RC35 programming unit - Technical specifications are subject to change without prior notice.
10
3.1.2 Installation on boiler
The unit can be installed directly on boilers equipped with EMS (Energy Management Sys-
tem).
The outside temperature sensor for outside temperature control is not delivered as stand-
ard, but can be ordered as an accessory.
3.2 Types of installation
The programming unit can be installed in three different ways:
– As the only programming unit in the system (factory setting): the programming unit is
mounted in a room in the home (the reference room) or on the boiler.
Example: detached house with one heating circuit.
– As the only programming unit in a heating system with two or more heating circuits1
(Fig. 2, 1).
Examples: underfloor heating on one floor, radiators on the others; or a main flat
together with a separate annex.
– In conjunction with a remote control unit (e.g. RC20/RC20RF, Fig. 2, 2). In this case
there are always two separate heating circuits. Remote control units cannot be used
with boilers with UBA1.x.
Examples: underfloor heating on one floor, radiators on the others; or a main flat
together with a separate annex.
Fig. 2 Options for a heating system with two heating circuits
1 Both heating circuits are controlled by one programming unit.
2 Each heating circuit has its own programming unit / remote control unit.
1) Not possible with boilers with UBA1.x and DBA.