Elster Merlin 5064 V3 User manual

Installation and
Operating Manual
Merlin 5064 V3
System Manager
Please observe the safety instructions and
read through this manual carefully before
commissioning the equipment.

Safety information General information
2
General infor mation
Safety information
Power connection regulations
Please note the connection conditions specified by your
local electrical power supply utility and the VDE
regulations.
Your heating control system may be installed and
serviced only by appropriately authorised specialists.
E For fixed devices, a facility for mains disconnection in
accordance with EN 60335 must be installed in
compliance with the installation specifications (e.g.
switch).
EThe mains lines insulation must be protected against
damage caused by overheating (e.g. insulation hose).
EThe minimum distance to installation objects in the
vicinity must be chosen so that the permitted ambient
temperature is not exceed during operation (see table
- Technical Data).
EIf the system is not installed properly, persons using it
are at put at risk of fatal or serious injury (electric
shock).
Ensure the controller is de-energized prior to
performing any work on the controller!
Safety
Please read and keep in a safe place
Please read through these instructions
carefully before installing or operating. Following the
installation, pass the instructions on to the operator.
Warranty conditions
If the system is not installed, commissioned, serviced and
repaired professionally, this will render the manufacturer's
warranty null and void.
Conversion
All technical changes are prohibited.
Transport
On receipt of the product, check that the delivery is
complete. Report any transport damage immediately.
Storage
Store the product in a dry place. Ambient temperature:
see Technical data.
Important text passages
!Important information is highlighted with an
exclamation mark.
EThis attention symbol indicates dangerous situations.
Note
!The operating manual describes the maximum
version of the controller, meaning that not all
statements are relevant for your device.
!The hydraulic diagrams contained in these
operating and installation instructions are
schematic diagrams. They are designed to assist
you in selecting the correct program, and in no way
describe or replace system planning according to
good professional practice; for this reason, it cannot
be guaranteed that systems built on the basis of a
ono-to-one copy of these diagrams will function
correctly!
General Notes
!With regard to installation, operation, and
maintenance, the following instructions must be
observed. This device must only be installed by a
specialist technician. Improperly performed repairs
can subject users to considerable risks.
!To comply with applicable regulations, the
instructions for assembly and operation must be
readily available at all times and must be handed
over to the responsible engineer when working on
the device for his attention.
Description
Declaration of conformity
We the manufacturer declare the product Merlin 5064 V3
is in conformity with the fundamental requirements of the
following directives and standards.
Directives:
– 2004/108/EC,
– 2006/95/EC
Standards:
– EN 60730-1,
– EN 60730-2-9
The manufacture is subject to the quality management
system in accordance with DIN EN ISO 9001.
Function
The device contains a number of functions and must be
set in accordance with use. The following functions are
mapped in the System Manager:
Cascade modulating boiler
Cascade switching boiler
Control of 2 HS or 2-stage HS via relay
Pellet function (leading HS switch-off)
Service water heating system, 2 mixed heating
circuits, and 2 extra functions (use as fixed value
pump heating circuit possible)
Heating operation via buffer storage possible
Solar functions
Cooling operation
Demand-related circulation pump control
Automatic toggle between summer and winter time
Activation of a timer for the entire heating system
possible

General information Contents
3
Contents
General information 2
Safety information 2
Power connection regulations 2
Safety 2
Warranty conditions 2
Important text passages 2
Note 2
General Notes 2
Description 2
Declaration of conformity 2
Function 2
Contents 3
Part 1: Operation 6
Normal Mode 6
Control elements in normal mode 6
Display / line functions in normal mode 6
Setting the mode as well as the Party, Reducing
and the "Direct Holiday Function" 6
Selecting an operating mode 7
Effect of the operating mode 7
Operating mode 8
Control elements in operating mode 8
Display in operating mode 8
General operating procedure 8
Selectable functions with the F buttons 8
Areas [Type of set values] 8
Display 8
User 8
Time program 8
Time-Date 8
Service 8
Expert 8
Expert HS (only for HS via BUS) 8
Levels [Assignment of the set values] 8
Installation 8
Hot-Water 8
Heatcircuit 1 / 2 8
Solar / MF 8
Part 2: Overview of display values and settings 9
Display Range 9
Installation 9
T-Outside [F9] 9
Ext setpoint [F15] 9
T-Header (only for Cascades) [F8] 9
T-HS [F8 or BUS] 9
HS State 9
T-Return total [F17] 9
T-Buffer T/M/B [F3/F2/F1] 9
Mod depth 9
Hot-Water 9
T-DHW Rated (hot water set temperature) 9
T-DHW (hot water temperature) [F6] 9
DHW-T B (storage tank bottom temp.) [F12] 9
T-Circulation (return flow temperature of
circulation) 9
Heatcircuit 1 / 2 10
T-Room (room temperature) [F2/F15] 10
T-Pool (pool temperature) [F2/F15] 10
T-DHW (hot water temperature) [F11/F5] 10
T-Flow (Flow temperature) [F11/F5] 10
Need-Opti-Time (last required heating-up time) 10
Solar/MF (Solar + Multifunction) 10
T-MF(1-4) [F11-F14] 10
T-Solar (1,2) (collector temperature) 10
Sol pump (1,2,3) (collector pump status) 10
Charge ST (DHW,BU,3)
(status of Cylinder charging pump) 10
Charge (DHW2,BU2) (status of transfer pump) 10
User Area 11
Installation 11
English => Language 11
LCD Contrast 11
LCD Brightness 11
°C / °F 11
Hot-Water 11
1x hot water (1x hot water) 11
T-DHW des 1-3
(Hot water temperature setting) 11
BoB-Value (Operation Without Burner) 11
Circl-Pump DHW (Circulation with hot water) 11
Antilegion
(Hot water short time heating function) 11
Heatcircuit 1/2 12
Operation 12
T-Room des 1-3 12
T-Reduced 12
T-Absence 12
T-Room cooling (only in cooling mode) 12
T-Outside Cool (only in cooling mode) 12
T-Limit Day / T-Limit Night 12
Heat-Slope 12
Adaption (Heating curve adaption) 13
Room Influence (Room sensor influence) 13
T-Room adj (Room sensor adaptation) 13
Heat up opti (heatup optimisation) 13
Max Opt-Time (Maximum bring-forward) 13
Opt reduced (Reduction optimisation) 13
PC enable 13
Timer Program Area 14
Adjusting a time program 14
Heating circuits and hot water 14
Time Program for Solar 15
Kick function enabling 15
Area Time-Date 15
Parameters on the Time-Date level 15
Time 15
Time Master for all controllers 15
Date 15
Holiday function 15
Automatic summer/winter time changeover 15
Service area 16
Relay status and test 16
Relay Test 16
Code number Entry 16
Sensor Test 16
Software number XXX.XX 17
Cascade manual operation
(only with code number) 17
Burner time and Burner starts 17

Contents General information
4
STL-test 17
Service 17
By date 17
After operating hours 17
Delete the displayed maintenance message 17
Reset … 17
Expert area 18
Code-No input 18
System configuration 18
Change code 18
BUS ID 1 / 2 (Heating circuit number) 18
BUS Termination (bus termination resistor) 18
eBUS Supply (supply for eBUS) 18
Time Master 18
Plant Select
(selecting basic controller functions) 18
HS1 Type (first heat generator type) 18
HS1 BUS (connection for HS) 18
HS2 Type (second heat generator type => A7) 19
Storage HS2 (heat accumulator for HS2) 19
Buffer type (heater buffer storage type) 19
Cool Operation
(Space cooling via operating mode) 19
F15 function (sensor function for F15) 19
Set values for heat generators 20
Max T-HS1 (Max. temperature Boiler) 20
Min T-HS1/2 (min temperature Boiler) 20
Max/Min T-Header (only for cascade) 20
Protection from condensate 20
Warm Up Temp 20
Min Delimi (minimum delimiter HS) 20
Hysteresis with hysteresis time 20
Time Seq-Mod (time to sequence change) 21
Block-Time (delay time for next stage) 21
Hyst Burner 2 (for solid fuel / 2nd burner) 21
Gradient method 21
Gradient 21
Max reduce 21
Dyn cutoff 21
HS emergency cooling 21
HS Cool-fct (activation of the emergency
cooling function for HS) 21
with T-HS Cool
(starting temperature for cooling) 21
Switching pattern for 2-stage burners 22
Switching behaviour of the HS with
gradient method 22
Set values for cascade control 23
Enrolment HS 23
Detected HSS (number of heat generators) 23
Capacity / Stage
(heat generator output for each stage) 23
BUS Scan 23
min Mod Cascade (min. modulation cascade) 23
DHW HS (number of stages for HW operation) 23
Control Deviation (collector control deviation) 23
Desired Output (required system output [in %]) 23
Switch Value (-99 – +99) 24
Block Time (currently remaining value) 24
Max T-Module
(maximum temperature of the boiler) 24
Dyn Upward
(dyn. heat generator connection [K]) 24
Dyn Downward
(dynamic heat generator deactivation [K]) 24
Reset Time (reset time for I-Control) 24
Modulation Max 24
Modulation Min 24
Min Mod HS 24
Modulat DHW (only for HW modules) 24
Sequence 1 24
Sequence 2 24
Sequ Change (type of sequence change) 24
Time Seq-Mod *) (time to sequence change) 24
Block-Time *) (delay time for next stage) 24
Set values for modulation control 25
Min Mod HS 25
Dyn Upward
(dyn. heat generator connection [K]) 25
Dyn Downward
(dynamic heat generator deactivation [K]) 25
Set values for buffer storage 25
T-Buffer Charge 25
Min T-Buffer 25
Set values for cooling mode 26
T-Return cooling 26
Set values for 0-10V Input / Output 26
V-Curve (only for 0-10V input/output) 26
Curve 11-xx (only when V-Curve = 11) 26
Screed program 27
Preset values 27
Screed (activation of screed drying process) 27
Screed Program (settings) 27
Hot-Water 28
DHW Relief (DHW Relief) 28
Parallel DHW (Pump parallel running) 28
T-HS DHW (increase during HW operation) 28
Hysteresis DHW (hot water hysteresis) 28
DHW Followup (pump run-down time) 28
Therm Input (storage tank with thermostat) 28
Wall Hung (for modulating HS) 28
Load Through (only with F12 = T-DHW B) 28
Heatcircuit 1 / 2 29
HC Function (heating circuit function selection) 29
Pump Mode (pump operating modes) 29
Mixer Open (open mixer dynamic) 30
Mixer Close (close mixer dynamic) 30
Max T-Flow (max. flow temperature) 30
Min T-Flow (min. flow temperature) 30
T-Flow cooling
(only in installation cooling mode) 30
T-Frost protect (frost protection temperature) 30
Outdoor delay (outside temperature delay) 30
Slope Offset (heating slope distance) 30
B-Heat Sink (circuit enable) 30
Auxiliary relay functions 31
Solar/MF 31
MF (1-4) Func (function selection relay MF) 31
T-MF(1-4) Setpoint
(switching temperature relay MF) 33
MF (1-4) Hyst (Switch on hysteresis Relay MF) 33
MF (1-4) Hyst Off
(Switch off hysteresis Relay MF) 33
Solar parameters 34
Max T-Solar 34
Min T-Solar ON 34
Min T-Solar OFF 34
T-Solar protect 34

General information Contents
5
Rflow cool diff 34
Max T-Bu HW, BU, 3 34
Sol Kick Period [sec] 34
Sol Kick Pause [min] 34
Sol Kick Gradient [min] 34
Part 3: General function description 35
Heating circuit control 35
Weather-dependent control 35
Room sensor influence 35
Hot water generation 35
BoB => operation without burner 35
Frost protection function 35
eBUS burner controls 35
EEPROM check 35
Circulation pump control 35
Switched according to heating requirement 35
Switched according to heating limits 36
Delayed pump switch-off 36
Pump blocking protection 36
Mixer motor blocking protection 36
Cooling mode - refrigerating machines 36
Cooling mode - heating circuit 36
Part 4: Installation and Start-up 37
Installation 37
Assembly / Dismantling 37
Connecting instructions 38
Connection diagram 39
Choice of installation 40
Installation 01 = Merlin 4034 => cascade
controller for modulating boiler 40
Terminal assignment 40
Installation 02 = Merlin 4834 => cascade
controller for switching boiler 41
Terminal assignment 41
Installation 03 = Merlin 3611 => 0-10V controller 42
Terminal assignment 42
Installation 04 = Merlin 0634 => Standard
controller with 2-stage HS 43
Terminal assignment 43
Installation 05 = 2HS controller =>
2 HS cascade switched via relay 44
Terminal assignment 44
Installation 06 = Merlin 6644 => Pellet and buffer
controller 45
Terminal assignment 45
Installation 06 = Merlin 6644 => Pellet and buffer
controller with combination storage =>
with parameter settings! 46
Terminal assignment 46
Installation 07 = Merlin 1144 => Mixer valve
extension 47
Terminal assignment 47
Installation 09 = Cooling function in heating
circuit return 48
Terminal assignment 48
Installation 10 = Central cooling function and
solar integration 49
Terminal assignment 49
Solar installations - examples 50
Accessories 51
The operating module Merlin BM, BM 8 and
Lago FB 51
Remote control FBR2 51
Telephone switch 51
DCF receiver 51
PC 52
System bus 52
Bus ID 52
Sensors 52
Sensor values / characteristic curve 52
Outdoor sensor AF (AFS) S53
Immersion sensor KF (KFS) H/ SPF (SPFS) F53
Flow sensor VF (VFAS) v53
Commissioning 54
Process 54
Basic settings 54
English 54
Time 54
Year/Month/Day 54
Configuration 54
Plant select
(selecting basic controller functions) 54
HS1 Type (first heat generator type) 54
HS1 BUS (connection for HS) 54
HS2 Type (second heat generator type => A7) 55
Storage HS2 (heat accumulator for HS2) 55
Buffer type (heater buffer storage type) 55
Cooling mode
(Space cooling via operating mode) 55
Gradient 55
HC FUNCTION 1/2
(heating circuit function selection) 55
Capacity / Stage (HS output for each stage) 56
Auxiliary relay functions 57
MF 1 Func (function selection relay MF1) 57
T-MF1 Setpoint
(switching temperature relay MF1) 59
MF 1 Hyst (hysteresis relay MF1) 59
Solar parameters 60
Max T-Solar 60
Min T-Solar ON 60
Min T-Solar OFF 60
T-Solar protect 60
Rflow cool diff 60
Max T-Bu DHW, BU, 3 60
Sol Kick Period [sec] 60
Sol Kick Pause [min] 60
Sol Kick Gradient [min] 60
F15 function (sensor function for F15) 60
Bus ID (heating circuit number): 60
Sensors 60
Part 5: Appendix 61
Error Messages 61
Troubleshooting 61
Dimensions 62
Glossary 62
Technical data 63

Normal Mode Part 1: Operation
6
Part 1: Operation
Part 1: Operation
Normal Mode
Mo 26. May 05 10:00
T-HS 1 56,8°C
(1)
Standby Heating
1
2
3
4
!Due to the tolerances of sensors, deviations of
+/- 2K (2°C) are normal between various
temperature displays. Temperatures which change
rapidly can have higher deviations for short periods
due to the different time-related behaviour of
various sensors.
! The indicator of the current heating programs of all
internal heating circuits of the controller is firmly
anchored in the favorite level line [2]. The
associated heating circuit is displayed in brackets.
You can program all other favorites yourself. The
rotary knob is used to change the display.
End
Party
Reduced
OK
Mode .
Standby
End
Party
Reduced
OK
Mode .
01 00
h min
Reduced
End
Party
Reduced
OK
Mode .
05 days
Reduced
For initial start-up or the "level Installation,"
please read the installation section.
Control elements in normal mode
Rotary knob: Use the rotary knob to select a value
from the favourite level for display in line 2
Home button: Switch between operation of the
controller and normal mode (standard display)
F keys => See line functions
Display / line functions in normal mode
Line 1: Displays Day, Date and Time
F button: Adjust Date, Time and Holiday
Line 2: Displays Favorites (the selection of the currently
displayed favourites takes place with the rotary knob)
F button: Adjust Favorites or additional displays
Line 3: Display the temperature of the heat generator 1
or the collector for cascades
F button: Display of the set temperature for the HS
Line 4: Left => Display of the central operating mode
Right => Display of the current situation of the first
heating circuit – provided it is not remote controlled
(Heating, Reducing, Party or Holiday)
F button: Adjust or activate the mode, the Party,
Reducing or the Holiday function (valid for all internal
heating circuits)
!In order to adjust the values from the standard
display, press the associated F button and adjust
using the rotary knob or, if there are several
values, first select the desired value with the F
button. Save the value using the F button [OK].
Setting the mode as well as the Party, Reducing and
the "Direct Holiday Function"
In normal mode (standard display), press the F button [4].
The rotary knob can now be used to change the
operating mode (see next page for the operating mode).
Save with "OK" => F button [4]
End without save with "End" => F button [1]
For the activation of the party or the reducing function,
press the corresponding F button [2 or 3].
The rotary knob can now be used to set the heating time
increase (Party) or the heating time interruption
(Reducing).
If the heating or reducing needs to take place for the rest
of the day, then you can turn the rotary knob to the left to
heat or interrupt the heating for entire days. In this
manner, a direct starting holiday program can be set very
quickly (e.g. Reduced 5 Days)

Part 1: Operation Normal Mode
7
Selecting an operating mode
The selected mode is indicated in the display. It will
come into effect when the setting is confirmed and not
changed for 5s.
The following operating modes are available for selection:
Cooling operation
- Heating operation disabled (hot water preparation only)
- Start of the refrigerating machines if required by the
heating circuit or the temperature Installation/T-Return
Cooling is exceeded
- Heating circuits controlled to the temperature Heating
circuit x/T-Flow Cooling
When MF function "cooling switch-over valve" is
active => Hydraulic separation of the cooling circuit
- Actuation of the switch-over valve cooling
iStandby / OFF
(Heating OFF and hot water preparation OFF,
only frost protection mode) Exception: see F15 Function
page 19
F1 Automatic 1 (Automatic mode 1)
(Heating according to timer program 1;
HW according to HW program)
F2 Automatic 2 (Automatic mode 2)
(Heating according to timer program 2;
HW according to HW program)
FSummer (Summer mode)
(Heating OFF, HW according to HW program)
hHeating (Day mode)
(24 h heating with comfort temperature 1;
HW according to HW program)
CReducing (Night mode)
(24 h heating with reduced temperature;
HW according to HW program)
WService (automatic reset after 15min)
The heat generator regulates to the maximum heat
generator temperature. When the heat generator
temperature has reached 65°C, the consumers are
regulated to their maximum flow temperature to dissipate
heat (emergency cooling).
!The emergency cooling function must be explicitly
enabled in the consumer circuits by means of a set
value (B-Heat sink set value).
Effect of the operating mode
The operating mode set here affects the boiler regulation
and the integrated heating circuits of the controller.
Each heating circuit can be assigned a separate
operating mode from the one set by means of the
"operating mode" parameter in the user level of the
corresponding heating circuit.
When the "i= Standby/OFF", and "F= Summer mode"
operating modes are set, they have a reducing effect on
all the heating circuits of consumer circuits in the entire
system.

Operating mode Part 1: Operation
8
Operating mode
Control elements in operating mode
Home button: Switch between operation of the
controller and normal mode (standard display)
Rotary knob: Search for a level, or
search for a set value/parameter, or
adjust the selected value
Press F buttons:
Select the adjacent level
Select the adjacent value
Select the adjacent function [text]
To change or query set values, an F button must first be
pressed in normal mode:
=> Change/display the selected value
or the Home button must be pressed:
=> Controller switches to Operation mode
Display in operating mode
End
01
Display
Main menu .
User
Time Programs
General operating procedure
Home button => operating mode
Use the rotary knob to find the area [type of values]
Use the F button to select the area
Use the rotary knob to search for the level
[generator/consumer]
Use the F button to select the level
Use the rotary knob to search for the set/display
value
Use the F button to select the set/display value
Use the rotary knob to change set value
Use the F button to select the function/confirm the
change.
Selectable functions with the F buttons
[End] Cancels the current function without saving
[Favorite] Transfers the set value to the favourite level
[Standard] Changes the set value to the factory setting
[OK] Cancels and saves the current function
[==>] Next set value (e.g. time: hour->minute)
[<==] Previous set value (e.g. date: month<-year)
End
Favorite
Standard
OK
T-Room desired 1 .
20,0 °C
When applying voltage, the level installation is
displayed once only. Once the values grouped here
have been set the controller is operable.
When the level appears later on, e.g. after a power
outage, the function can just be ended.
Areas [Type of set values]
Display
System value display (e.g. sensor values and setpoints).
No adjustments can be made. Incorrect operation is
therefore impossible in this area.
User
Settings that can be made by the operator.
Time program
Time programs for heating circuits, the hot water circuit
and extra functions where applicable
Time-Date
Time, date, holiday program and data for the
summer/winter changeover
Service
Values for the service technician
Expert
Values for which expert knowledge is required to make
settings (installation technician).
EValues in the expert level are protected by a code no.
(damage/malfunction possible).
Expert HS (only for HS via BUS)
Summary/display of the values sent to the BUS by the
HS.
Levels [Assignment of the set values]
The settings in the different areas are sorted into
operating levels
Installation
All display values and settings that relate to the heat
generator or the entire system and cannot be assigned to
a consumer circuit.
Hot-Water
All display values and settings that affect central hot
water preparation and circulation.
Heatcircuit 1 / 2
All indicator and set values that relate to the
corresponding consumer circuit (also, for example, as
decentral hot-water circuit).
Solar / MF
All indicator and set values that relate to solar energy
recovery and settings for the multifunction relay.
!An overview of all settings can be found on the
following pages.

Part 2: Overview of display values and settings Display Range
9
Part 2: Overview of display values and settings
Part 2: Overview of display values / settings
Display Range
!Display only => no adjustment possible.
!Display only appears if the sensor is connected
and the value is present in the system, otherwise "-
---" or no display.
!Exit the level with "End"
Installation
(HG => heat generator) use to select parameters
T-Outside Outside temperature
Ext setpoint External set value specification
(0-10V)
T-Header Collector temperature and set value
(with F button) (only for cascades)
T-HS Temperature boiler 1 (through 8)
HS State Status (On/Off) boiler 1 through 8
T-Solid Fuel At boiler 2 = Boiler for solid fuel (A7)
T-Return 1 Return flow temperature of HS 1
T-Return 2 Return flow temperature of HS 2
T-Return total Installation return flow temperature
T-Buffer T Buffer storage tank temperature
removal
T-Buffer M Buffer storage tank temperature
charging zone HS
T-Buffer B Buffer storage tank solar zone
T-Storage 3 Temperature of storage tank 3
(e.g. solar pool-heating)
Mod depth Modulation degree of HS
Burner 1 Status burner relay 1 (On/Off)
Burner 2 Status burner relay 2 (On/Off)
Error Error number; 00 = error-free
Hot-Water
T-DHW Current hot water temperature and
current warm water set temperature as
per heating program and operating
mode
T-DHW B Temperature of HW tank in the lower
section (infeed/solar)
DHW require Status heating requirement warm water
(On/Off)
DHW pump Status warm water loading pump
(On/Off)
DHW release Release hot water preparation (On/Off)
T-Circulation Return flow temperature of the
circulation
Circulation
pump
Status circulation pump (On/Off)
Installation
T-Outside [F9]
The measured outside temperature is smoothed for
control purposes. The smoothed value is displayed here.
Ext setpoint [F15]
The 0-10V input can be used to preset an accumulative
set value for the control system (see V-CURVE p. 26).
T-Header (only for Cascades) [F8]
The set value appears after the F button is pressed. The
set value corresponds to the maximum required
temperature of the consumer circuits from the heating
system (incl. hot water preparation). The mixer circuits
request the temperature + heating curve distance (expert
value).
T-HS [F8 or BUS]
Current measured temperature of all connected heat
generators (only if sensors are present)
HS State
Additionally it is indicated whether the heat generator is
switched on; in the case of two-stage heat generators,
the status of the second stage is also displayed.
T-Return total [F17]
Return flow temperature for start of the refrigeration
machines (see [T-Return cooling]).
T-Buffer T/M/B [F3/F2/F1]
(only if buffer storage is installed)
Buffer storage tank temperatures in the discharge area,
the charging area and the infeed of alternative energy.
Mod depth
Display the required degree of modulation calculated and
the current modulation levels for all active heaters. The
ad is only when the corresponding figures are available
(configuration, BUS, etc.).
Hot-Water
T-DHW Rated (hot water set temperature)
Display of the currently valid value for control.
T-DHW (hot water temperature) [F6]
Display of measured upper storage tank temperature.
DHW-T B (storage tank bottom temp.) [F12]
For example for solar or solid fuel infeed or for active
charge-through function (CHARGE-THROUGH = 01).
Display hot-water tank temperature in infeed area.
T-Circulation (return flow temperature of circulation)
Only if temperature control of the circulation function is
activated.

Display Range Part 2: Overview of display values and settings
10
Heatcircuit 1 / 2
T-Room Current room temperature and
current room set temperature as per
heating program and operating
mode
Humidity Display of room humidity (if value is
available)
T-Pool Current pool temperature and pool
set temperature
T-DHW Current warm water temperature
and warm water set temperature
T-Flow Current flow temperature and
current flow set temperature
Circuit release Heating circuit in heating mode
(On/Off)
CH Pump Status of the heating circuit pump
(On/Off)
Need-Opti-Time Previous time required to heat up
with heat-up optimisation activated
Solar/MF
T-MF1 Temperature MF sensor 1 (=F11)
MF1 Status of relay MF1 (On/Off)
T-MF2 Temperature MF sensor 2 (=F12)
MF2 Status of relay MF2 (On/Off)
T-MF3 Temperature MF sensor 3 (=F13)
MF3 Status of relay MF3 (On/Off)
T-MF4 Temperature MF sensor 4 (=F14)
MF4 Status of relay MF4 (On/Off)
T-Solar 1 Temperature, collector 1
T-Solar 2 Temperature collector 2
T-DHW Current hot water temperature and
current warm water set temperature
as per heating program and
operating mode
T-DHW B Temperature of HW tank in the
lower section (infeed/solar)
T-Buffer T Buffer storage tank temperature
removal
T-Buffer M Buffer storage tank temperature
charging zone HS
T-Buffer B Buffer storage tank solar zone
T-Storage 3 Storage 3 charging zone (F15)
Sol pump 1 Status of collector pump 1
Sol pump 2 Status of collector pump 2
Sol pump 3 Status of the collector pump 3
Charge ST HW Status of Cylinder charging pump 1
Charge ST BU Status of Cylinder charging pump 2 /
or the switch-over valve on Sp2
Charge ST 3 Status of Cylinder charging pump 3 /
or the switch-over valve on Sp3
Charge DHW2 Status transfer pump on 2nd
DHW storage tank [F15] (cascade)
Charge BU2 Status transfer pump on the 2nd
buffer storage tank [F15] (cascade)
Heatcircuit 1 / 2
T-Room (room temperature) [F2/F15]
Only if a sensor or a FBR is connected.
T-Pool (pool temperature) [F2/F15]
Only if the heating circuit is configured as pool controller.
T-DHW (hot water temperature) [F11/F5]
Only if the heating circuit is configured as hot-water
circuit.
T-Flow (Flow temperature) [F11/F5]
Display of the measured flow temperature of the heating
circuit (only for mixed circuits) and display of the current
flow set temperature for the control.
Need-Opti-Time (last required heating-up time)
Display of the time last required for heating-up.
Solar/MF (Solar + Multifunction)
See the description for multifunction 1-4 under Expert.
see page 31
!This page only displays those parameters where
the corresponding functions have been implemen-
ted and activated.
T-MF(1-4) [F11-F14]
A sensor is assigned to the four available multifunction
relays respectively. If the sensor is not used by another
standard function, a function that requires the sensor may
be selected for the relay. In this case the measured value
is displayed here.
In some special cases, e.g. when selecting the functions
"return flow temperature increase" or "collector pump" the
measured value is additionally displayed as T-Return
under installation or as T-Solar under Solar/MF
T-Solar (1,2) (collector temperature)
Display of the collector pump temperature/s if solar
installation configured via MF relay.
Sol pump (1,2,3) (collector pump status)
Charge ST (DHW,BU,3)
(status of Cylinder charging pump)
Status indication of the configured solar pumps.
If only one storage tank is charged by the solar system,
the associated MF relay must be configured as a Cylinder
charging pump (DHW, BU, 3).
A collector pump is only configured if either two collectors
(East-West alignment) charge one/more than one storage
tank or if multiple storage tanks are charged by the solar
system (switch-over of charging via switch-over valves).
Charge (DHW2,BU2) (status of transfer pump)
Status indication of the transfer pump for cascade
storage.

Part 2: Overview of display values and settings User Area
11
User Area
All the settings that can be made by the operator of the
system.
Installation
Designation Value range Standard IV*)
Language Acc. to version English
LCD Contrast (0) – (6) 4
LCD
Brightness
00 – 30 30
°C / °F Celsius, Fahrenheit Celsius
*) IV = Internal Values:
Space for entering the parameters stored in the system!
Hot-Water
Designation Value range Standard IV
1x hot water Off/On Off
T-DHW 1 des 10°C – 70°C 60°C
T-DHW 2 des 10°C – 70°C 60°C
T-DHW 3 des 10°C – 70°C 60°C
BoB-Value 0K – 70K 0K
Circl-Pump DHW OFF/ON OFF
Antilegion OFF/ON OFF
Installation
English => Language
Select controller language
LCD Contrast
Adjust intensity of display
LCD Brightness
Adjust the brightness of the display illumination.
°C / °F
Changeover between display of values in Celsius or
Fahrenheit.
Hot-Water
1x hot water (1x hot water)
On => The storage tank is enabled for charging
(e.g. for showering outside hot water times).
Charging starts when the temperature falls below "T-
DHW 1 des" by the switching hysteresis.
T-DHW des 1-3 (Hot water temperature setting)
Required hot water temperature setting
T-DHW 1 des => used in first enable time,
T-DHW 2 des => used in second enable time,
T-DHW 3 des => used in third enable time of hot water
program.
BoB-Value (Operation Without Burner)
Energy saving function for solar or solid fuel integration
For settings > "0" the burner is not activated for hot water
preparation until the hot water temperature has dropped
below the temperature setting by the set value + the
switching hysteresis.
Circl-Pump DHW (Circulation with hot water)
On => The circulation pump runs when the hot water is
enabled, but the circulation program is disabled.
Antilegion (Hot water short time heating function)
On => Activation of hot water short time heating function
Every 20th time that heating takes place or once per
week on Saturday at 01:00 hrs the storage tank is heated
up to 65°C.
It is possible to set up your own hot water short time
heating function using the third hot water enable facility.

User Area Part 2: Overview of display values and settings
12
Flow temperature
[°F] [°C]
212
176
140
104
68
[°C]
68 60 54 46 39 32 25 18 10 4 [°F]
Outside temperature
*) or, depending on the function selected for the heating
circuit, also
T-Pool, T-DHW, T-Flow Day or T-Flow Night
(see page 29)
Operation
(also see page 7)
- - - - => The controller programming switch applies in this
case.
When setting an alternative operating mode this only
applies to the assigned heating circuit.
When the "Standby" and "Summer" operating mode of
the controller programming switch are set, this has a
reducing effect on all heating circuits and consumer
circuits in the entire system.
T-Room des 1-3
Required room temperature setting
T-Room des 1 => used in first enable time,
T-Room des 2 => used in second enable time,
T-Room des 3 => used in third enable time of active
heating program for this heating circuit.
T-Reduced
Required room temperature setting during night reduction
T-Absence
Required room temperature setting during holidays
T-Room cooling (only in cooling mode)
Starting condition for cooling function to room
temperature
"----" = Without effect => Cooling operation enabled **)
If the operating mode Cooling is activated at the central
control, this temperature is used as the set room
temperature for this heating circuit. Cooling operation is
activated when the temperature is exceeded. Cooling
mode ends when the temperature drops 2K below.
T-Outside Cool (only in cooling mode)
Starting condition for cooling function to outside
temperature
"----" = Without effect => Cooling operation enabled **)
If the operating mode Cooling is activated at the central
control, cooling operation is activated for this heating
circuit when the outside temperature exceeds the
temperature set here. Cooling mode ends when the
temperature drops 1K below.
**) If starting conditions are set for room as well as
outside temperature, both conditions must be met before
cooling operation starts.
T-Limit Day / T-Limit Night
Only valid if the function is activated => Set value
"Expert/Heating circuit/Pump function = heating limits =>
Pump switching according to heating limit"
If the outside temperature that is measured and
calculated by the controller exceeds the heating limit
specified here by 1K (= 1°C), heating is disabled, the
pumps switch off and the mixers are closed. The heating
is enabled again when the outside temperature drops
below the set heating limit.
T-Limit Day => applies during heating times
T-Limit Night => applies during reduction times
"----" => The heating limit is deactivated. The circulation
pump is switched in accordance with the standard
function (see chapter entitled "Circulation pump control")
Heat-Slope
The gradient of the heat slope indicates by how many
degrees the flow temperature changes if the outside
temperature rises or drops by 1 K.
Setting tip:
At cold outside temperatures, room temperature too low
=> Increase heat slope (and vice-versa)
At high outside temperature (e.g. 16°C) room
temperature too low => correction via set room
temperature
Heat slope diagram (setting aid)
Setting 0 => Room control only
Heatcircuit 1/2
Designation Value range Standard IV
Operation ----, Standby,
Automatic 1 / 2,
Summer, Heating,
Reducing
----
T-Room des 1 *) 5°C – 40°C 20°C
T-Room des 2 *) 5°C – 40°C 20°C
T-Room des 3 *) 5°C – 40°C 20°C
T-Reduced*) 5°C – 40°C 10°C
T-Absence 5°C – 40°C 15°C
T-Room cooling ----, 20°C – 40°C 25°C
T-Outside Cool ----, 0°C – 40°C 27°C
T-Limit Day ----, (-5)°C – 40°C 19°C
T-Limit Night ----, (-5)°C – 40°C 10°C
Heat-Slope 0.00 – 3.00 1.20
Adaption OFF/ON OFF
Room Influence OFF / 0 – 20 10
T-Room adj (-5.0)K – (5.0)K 0.0K
Heat up opti Off, T-Outside,
T-Room
Off
Max Opt-Time 0:00 – 3:00 [h] 2:00 [h]
Opt reduced 0:00 – 2:00 [h] 0:00 [h]
PC enable 0000 – 9999 0000
0,2
0,4
0,6
0,8
1
1, 2
1, 5
2
2,5
3
20
40
60
80
10 0
2 0 16 12 8 4 0 - 4 - 8 - 12 - 16

Part 2: Overview of display values and settings User Area
13
!The heat slope can best be set at outside
temperatures below 5°C. The change in heat slope
setting must be made in small steps and at long
intervals (min. 5 to 6 hours) because the system
must first adjust to the new values each time the
heat slope is changed.
Guideline values
Underfloor heating S = 0.4 to 0.6
Radiator heating S = 1.0 to 1.5
Adaption (Heating curve adaption)
Only active if an FBR analogue room device is connected
(room sensor + operating mode selection) and an outdoor
sensor.
Function for automatic heal slope setting
Starting Conditions:
External temperature < 8°C
Operating mode is automatic (I or II)
Duration of lowering phase at least 6 hours
At the beginning of the lowering period, the current room
temperature is measured. During the next four hours, this
temperature is used as the set point for the room
regulator. The heating curve is calculated from the values
determined during this time by the regulator for the flow
pipe nominal temperature and the external temperature.
!The parameter remains activated until the
adjustment has been completed successfully
without an interruption due, for example, to a Warm
Up Temp or the hot water requirement of an
external circuit.
!During the adaptation, the water heating and the
heating optimisation of the regulator are blocked.
Room Influence (Room sensor influence)
Only active if an FBR analogue room device is connected
(room sensor + operating mode selection).
The HS temperature is increased by the set value when
the temperature drops below the required room
temperature by 1K.
=> High values lead to fast control and large HS
temperature fluctuations.
OFF- => pure weather-dependent control
0 => pure weather-dependent control **)
20 => pure room temperature control
**) Special function with room influence = 0
For one-off heating requirements during the night
reduction the heating pump continues to run until the next
heating period is reached (see chapter entitled
"Circulation pump control").
T-Room adj (Room sensor adaptation)
In the case of room control (e.g. with FBR) the
measurement can be corrected using this setting if the
room sensor is not measuring correctly.
Heat up opti (heatup optimisation)
Activation of function for automatically bringing forward
the start of heating.
Example: Heating program 6:00 hrs – 22:30 hrs
OFF: Building starts to be heated at 6:00 hrs.
ON: Depending on weather and room temperature,
heating starts soon enough so that building just reaches
the set room temperature at 6:00 hrs.
00 => start of heating not brought forward
01 => brought forward depending on weather
02 => brought forward depending on room temperature *)
*) Only active if an FBR analogue room device is
connected (room sensor + operating mode selection).
!Heatup optimisation occurs only if the reduced time
of the heating circuit is at least 6 hours.
Max Opt-Time (Maximum bring-forward)
Only active with "Optim Heat = T-Outside or T-Room"
The start of heating is brought forward by no more than
this time.
Opt reduced (Reduction optimisation)
Automatic reduction of burner disabling to end of set
heating time.
The burner is not restarted before the end of the heating
period during the set time period (last heating time only) if
it not already in operation.
This function prevents short-term heating of the heat
generator to the end of the heating period.
PC enable
Code number for enabling access to heating circuit data
from a PC
"0000" => access PC and terminal is blocked.
"0001“ => access is free of Terminal / access PC is
blocked.

Timer Program Area Part 2: Overview of display values and settings
14
Timer Program Area
All the time programs can be set in this area.
Adjusting a time program
Programs with maximum controller configuration
Heatcircuit 1 Prg1 1. Heating program for Heatcircuit 1
Heatcircuit 1 Prg2 2. Heating program for Heatcircuit 1
---- ----
Heatcircuit 2 Prg1 1. Heating program for Heatcircuit 2
Heatcircuit 2 Prg2 2. Heating program for Heatcircuit 2
---- ----
Hot-Water Program for hot water loading
Circulation Program for hot water circulation
Heating circuits and hot water
Heatcircuit 1
Heating program 1 => factory setting:
Mo. to Fr.: 06:00 to 22:00
Sa. and Su.: 07:00 to 23:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.
Heating program 2 => factory setting:
Mo. to Fr.: 06:00 to 08:00, 16:00 to 22:00
Sa. and Su.: 07:00 to 23:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.
Hot-Water
Factory setting:
Mo. to Fr.: 05:00 to 21:00
Sa. and Su.: 06:00 to 22:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.
Press the F button "Time Program"
Use  to search for the desired time program
=> e.g. "Heatcircuit 2 Prog2"
Use the F button [here button 3] to select time program
=> "Heatcircuit 2 Prog2" "Monday"
Use  to search for weekday/block
=> e.g. "Mo - Fr" (Monday – Friday)
Use the F button [OK] to select a block
=> "06:00 -- 08:00", "16:00 -- 22:00", --:-- -- --:--"
Use the F button [OK] to select a time
=> "06:00 -- 08:00", "16:00 -- 22:00", --:-- -- --:--"
Use the rotary knob to adjust the time
=> "06:00 -- 08:00", "17:00 -- 22:00", --:-- -- --:--"
Use the F button [OK] to save a new program
Use the F button [End] to exit a block
When connecting a digital room controller with heating
program input, the corresponding heating program in this
controller is automatically superseded.
Heatcircuit 2
Heating program 1 => factory setting:
Mo. to Fr.: 06:00 to 22:00
Sa. and Su.: 07:00 to 23:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.
Heating program 2 => factory setting:
Mo. to Fr.: 06:00 to 08:00, 16:00 to 22:00
Sa. and Su.: 07:00 to 23:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.
Circulation
Factory setting:
Mo. to Fr.: 05:00 to 21:00
Sa. and Su.: 06:00 to 22:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.

Part 2: Overview of display values and settings Time Program for Solar
15
Time Program for Solar
Kick function enabling
Factory setting:
Mo. to Su.: 00:00 to 24:00
Heating time 1
Mo.-Su.
Area Time-Date
This area contains different values for the user in order to
provide rapid access.
Parameters on the Time-Date level
Time
(hh:mm)
Set hour, F button [==>],
hh:mm, set minutes
Date
(dd. mm yy)
Set year, F button [<==], set month,
F button [<==], set day,
Holiday begin
(dd. mm yy)
Set date for begin of the holiday
time
Holiday end
(dd. mm yy)
Set date for end of the holiday time
Start Summertime
(dd. mm.)
Set date for begin of clock change
Stop Summertime
(dd. mm.)
Set date for end of clock change
Parameters on the Time-Date level
Time
(Not for Time Master or DCF in the system)
! There may be a time difference of up to 2 minutes
per month (correct time if necessary). If a DCF
receiver is connected the correct time is always
displayed.
Time Master for all controllers
! If a heating system controller has been set to be
the Time Master (time setting for all controllers, see
Expert/Configuration) or a DCF (Radio time
receiver) has been installed in the system, the time
is blanked out on all the other controllers in the
system.
!A max. of one Time Master can be set on the BUS.
Date
Please first set the year and then the month. Then the
number of days of the month are calculated during the
setting.
Holiday function
!Please do not enter the day of travel as the start
date, but the first day of the holiday (no more
heating from this day).
!Please do not enter the day of travel as the end
date, but the last day on which there is to be no
heating. When you arrive home the house should
be warm and there should be hot water.
!Stop holiday function => e.g. for early return by
pressing the program switch.
Automatic summer/winter time changeover
The current weekday is calculated automatically. It is
shown the standard display.
It is possible to change from summer to winter time by
entering the date.
!The default setting is valid for Central European
time zones. A modification is only required if the
date for the time change is changed by political
decree.
!The earliest date on which the change will occur
must be set. The controller performs the time
change on the Sunday following this date at 2:00
am or 3:00 am.
!If no time change is required, please set month
End to the same value as month start and day End
to the same value as day start.

Service area Part 2: Overview of display values and settings
16
Service area
This area contains values for the customer service
engineers in order to provide rapid access.
Use the F button to select a level (e.g. Relay Test).
Relay Test
00 Normal mode => Relay after control
01 A1: Pump, Heatcircuit 1
02 A2: Pump, Heatcircuit 2
03 A3: Hot water charging pump
04 A4: Mixer Open, Heatcircuit 2
05 A5: Mixer Close, Heatcircuit 2
06 A6: HS 1 On
07 A7: HS 2 On [2-stage:HS 1+2 (after 10sec) ON]
08 A8: Mixer Open Heatcircuit 1 / Multifunction 1
09 A9: Mixer Close Heatcircuit 1 / Multifunction 2
10 A10: Multifunction 3
11 A12: Collector pump / Multifunction 4
Sensor Test
Sensor 01 Buffer storage temperature Lower
Sensor 02 Buffer storage temperature middle or
room temperature heatcircuit 1
Sensor 03 Upper buffer storage temperature
Sensor 05 Flow temperature, heatcircuit 2
Sensor 06 Upper hot water temperature
Sensor 08 Heat generator / header temperature
Sensor 09 Outside temperature
Sensor 11 Flow temperature heatcircuit 1
temperature multifunction 1
Sensor 12 Hot water temperature lower or
temperature multifunction 2
Sensor 13 Solid fuel HS temperature or collector 2
or temperature multifunction 3
Sensor 14 Collector 1 temperature or
temperature 4
Sensor 15
Light
0-10V
Room temperature heatcircuit 2 or
measured value of the light sensor
or voltage value 0-10V input
Sensor 17 Return flow temperature of whole
heating system for cooling operation
Relay status and test
Relay Test
Use the shaft encoder to select the relay (01-11)
=> The selected relay is switched on. All other relays are
switched off.
!A code number must be entered for this function.
Code number Entry
1.Set number
F button [==>] next number
2.Set number
F button [==>] next number
3.Set number
F button [==>] next number
4.Set number
Use the F button [OK] to activate the Code-No
=> "Relay Test"
EThe relay test is automatically cancelled after 5
minutes without an operation.
Sensor Test
Use the F button to start the sensor test with, use to
select the sensor =>
temperature is displayed; use the F button [End] to end
the sensor test

Part 2: Overview of display values and settings Service area
17
Other entries (Service area)
Use to select a value
Software number
XXX.XX
Software number with index
Cascade manual
operation
(1-8; only with code no.)
Starting different burner stages
of the cascade
Burner time Burner time for all stages
Burner starts Burner starts for all stages
STL-Test Safety temperature limiter test
with heat generator
temperature display =>Start
with F button
(hold down)!
Service
(only with code no.)
Input of date or hours for
service messages
Reset User Load user parameter factory
settings
Reset Expert
(only with code number)
Load expert parameter factory
settings
Reset Time Prog Load time program factory
settings
Communic BM 1 Remote control HC1 on BUS
Communic BM 2 Remote control HC2 on BUS
Use the F button [End] to exit the level
Software number XXX.XX
Display software number with index (please specify if you
experience problems / have questions about the
controller)
Cascade manual operation (only with code number)
(only for cascades in "Service" operation mode)
Use F button to open level and search using.
After selecting the heat generator with the F button an
output can be selected for this boiler.
With respect to multi-stage heat generators, the second
stage can be activated by means of presetting an output
value > 50%. After closing the service functions the
entries are reset automatically.
Burner time and Burner starts
For example, select "Burner time" (F button).
=> Shows the current values ( )
Reset display: Use the F button to select the boiler and
the level. Use the F button to "Reset"
Use the F button [End]=> to exit the level
STL-test
Start the STL-test (F button). Use to search for the
boiler. Use the F button to select the boiler
=> Display heat generator temperature.
Press and hold the "Start" button until the STL is
activated:
Burner I ON all pumps OFF and all mixers CLOSED
The temperature can be observed in the display.
Service
By date
Activation by entering date for the yearly service
message.
Delete programmed annual message:
Set the value date => year to "Off" (< 01) in the
General/Service/Customer Service level.
After operating hours
Activation by entering operating hours of the installation
after which a service message should be put out.
Delete programmed message:
Set the value Operating H to "Off" (< 50) in the
General/Service/Customer Service level.
Delete the displayed maintenance message
Press the F button, use to set the repeat value to "00",
confirm with F button [OK].
Reset …
The three value groups can be reset to the factory setting
using the Reset function.
Use the F button to select the Reset function, use to
set it to "On" and use the [OK] button to load the standard
values. Use the F button [End] to exit the level (or Home
button).

Expert area Part 2: Overview of display values and settings
18
Expert area
It is only possible to change the fitter set values after
entering the code number.
EIf these values are set incorrectly, they may cause
malfunctions or damage to the system.
Code-No input
1.Set number
F button [==>] next number
2.Set number
F button [==>] next number
3.Set number
F button [==>] next number
4.Set number
Use the F button [OK] to save the code number
System configuration
Configuration
Designation Value range Standard IV
Change code 0000 – 9999 0000
BUS ID 1 (00), 01 – 15 01
BUS ID 2 (00), 01 – 15 02
BUS Termination Off/On On
eBUS Supply Off/On On
Time Master Off/On Off
Plant select ----, 01 – 10 ----
HS1 Type 00 – 06 03
HS1 BUS 00 – 05 00
HS2 Type 00 – 22 00
Storage HS2 00 – 03 00
Buffer type 00, 01, 02 00
Cool Operation Off/On Off
F15 Function 00 – 05 00
Sensors 1k / 5k Sensors 5k Sens.
Use the F button [End] to exit the level
Change code
Input of a new code number (It is essential to remember
the new code number after adjustment).
BUS ID 1 / 2 (Heating circuit number)
The heating circuits are sequentially numbered starting
with "01". heating circuit numbers must not be assigned
twice. For replacement controllers however, please enter
exactly the same heating circuit numbers as the replaced
controller.
BUS Termination (bus termination resistor)
„A bus termination resistor has to be set once in a bus
system. (HG controller or cascade controller). When
installing with a CoCo1, set this parameter to “off”.
Off => termination resistor is not set
On => termination resistor is set
eBUS Supply (supply for eBUS)
Switching the eBUS supply on / off in relation to
connected devices (power supply balance).
Time Master
(Only without or Time Master in system)
Off = no time master, each heating circuit has its own
time
On = controller is time master, all controllers and remote
controls take over the time settings of this controller.
!No more than 1 Time Master is permitted in the
system!
Plant Select (selecting basic controller functions)
This set value can be used to preset the other values of
the start-up level
(see also installation description on page 40).
When the installation set value is selected, this also
displays "----" = no change to preset => values retain their
previously defined status
(values on delivery: Merlin 0634 2-stage burner; hot water
preparation two mixed heating circuits).
01 = [4034] => cascade controller for modulating boiler
02 = [4834] => cascade controller for switching boiler
03 = [3611] => 0-10V controller
04 = [0634] => Standard controller with 2-stage HS
05 = 2HS controller => 2 HS cascade switched via relay
06 = [6644] => buffer and pellet controller with solar
function
07 = [1144] => Mixer valve extension
08 = not yet assigned
09 = [0321] => Cooling function in heating circuit return
10 = [0321] => Central cooling function and solar
integration
HS1 Type (first heat generator type)
00 = No heat generator (Mixer valve extension)
01 = Single stage HS switching
02 = Single stage modulating
03 = 2-stage HS switching (second stage via A7)
04 = Two individual HS switching (second HS via A7)
05 = Multistage switching (cascade via BUS)
06 = Multistage modulating (cascade via BUS)
HS1 BUS (connection for HS)
00 = Relay => Standard (switching HS)
01 = CAN-BUS => Standard (cascade switching)
02 = eBUS => HS without temperature controller
=> Preset modulation depth
=> Standard (cascade modulating)
03 = eBUS => HS with temperature controller
=> Preset desired temperature
[not suitable for cascade]
04 = 0-10V Presetting of the desired temperature
[T-HS DES]
only for HS1 Type = 01, 02 or 03
Burner relays are controlled in parallel
Sensor KF [F8] must be connected
05 = 0-10V Preset modulation depth only for
HS1 Type = 02

Part 2: Overview of display values and settings Expert area
19
HS2 Type (second heat generator type => A7)
(For HS1 with 2-stage burner – not active)
00 = No secondary heat generator
01 = Single stage HS switching
08 = Cooling 1
20 = Solid fuel integration
(additional non-controllable HS)
for switching behaviour, see parameter HS2 storage
21 = Collector pump
22 = Pump for HS1
(e.g. additional HS for cascades)
Storage HS2 (heat accumulator for HS2)
(Only where HS2 Type = Solid fuel)
Warm-up relief applies superordinated:
ON: T-HS2 > Min T-HS2
OFF: T-HS2 < [Min T-HS2 – 5K]
T-HS2 = Solid fuel burner temperature
00 = Heating vis-à-vis collector (no storage tank) => F8
ON: T-HS2 > [F8 + Hyst Burner 2 + 5K]
OFF: T-HS2 < [F8 + Hyst Burner 2]
01 = Heating vis-à-vis buffer storage tank => F1, F3
ON: T-HS2 > [F3 + Hyst Burner 2 + 5K]
OFF: T-HS2 < [F1 + Hyst Burner 2]
02 = Heating vis-à-vis HW tank => F6
ON: T-HS2 > [F6 + Hyst Burner 2 + 5K]
OFF: T-HS2 < [F6 + Hyst Burner 2]
03 = Heating vis-à-vis STORAGE III (Pool) => F15
ON: T-HS2 > [F15 + Hyst Burner 2 + 5K]
OFF: T-HS2 < [F15 + Hyst Burner 2]
Switching pattern
The pump is switched on if the temperature of the solid
fuel boiler exceeds the temperature of the Reference
sensor by the hysteresis (Hyst Burner 2 + 5K). Switching
off occurs when the temperature drops 5K below the
switch-on temperature.
Warm up Temp
Switching off occurs when the temperature of the solid
fuel boiler drops below the set limit temperature
(Min T-HS2) by 5K. The pump is enabled again when the
temperature of the solid fuel boiler exceeds the set limit
temperature (Min T-HS2).
Buffer type (heater buffer storage type)
!After activation (01 or 02) it is not possible to
connect a FBR for heatcircuit 1.
00 = no buffer storage for heating operation
01 = Buffer storage for heating operation (F2, F3)
HS1 is activated with reference to sensor "buffer top" (F3)
DHW Relief operates on sensor "buffer top".
HW charge pump ON:
"Upper buffer" > HWactual + 5K Hysteresis
HW charge pump OFF:
"Upper buffer" < HWactual
02 = Combination storage tank for heating and HW
operation
HS1 is activated with reference to sensor "buffer middle"
(F2)
DHW Relief operates on boiler sensor BS.
HW charge pump ON:
BS > HWactual + 5K Hysteresis
HW charge pump OFF:
BS < HWactual
03 = passive buffer storage for heating operation (F1, F3)
The buffer will not load by the conventional Heat
generator producers. The use occurs, e.g., through solar
buffer loading [Buffer charging pump], [return flow
temperature increase] or [transfer pump for buffer
storage] (sensor usable).
In this attitude no change of the regulation of the heating
takes place in relation to the without buffers
Cool Operation (Space cooling via operating mode)
The mode of operation cooling and the necessary
settings are released. In the mode of operation cooling
the heating circles can be used for the cooling of the
room. For this function a refrigerating machine is
necessary.
F15 function (sensor function for F15)
00 = Room sensor for heatcircuit 2. if a further sensor at
the pulse input [IMP = F17] is detected at this position, an
FBR is evaluated at F15 and F17. If F17 is used by a
different function, an RFB is evaluated at F15.
01 = 0-10V input for presetting an external collector set
temperature. On evaluation see Parameter [V-Curve] in
the “Expert/0-10V I/O”-level.
02 = Light sensor => without function
03 = 0...10V input for presetting an external modulation
depth. On evaluation see Parameter [V-Curve] in the
“Expert/0-10V I/O”-level.
! The internal determination of the burner
requirement is deactivated when this function is
used.
! It is exclusively the target set via the 0-10V output
that applies. Any changes, such as those relating
to external heating circuits, hot water preparation
or the frost protection function are ignored. The
operating mode switch also has no effect on the
burner requirement, only on the internal and
external determination of requirement and
distribution.
04 = secondary sensor for MF function
05 = storage tank 3 (e.g. pool)

Expert area Part 2: Overview of display values and settings
20
Set values for heat generators
Heat generator
Designation Value range Standard IV
Max T-HS1 30°C – 110°C 85°C
Min T-HS1 10°C – 80°C 40°C
Min T-HS2 10°C – 80°C 40°C
Max T-Header 30°C – 110°C 85°C
Min T-Header 10°C – 80°C 40°C
Warm Up Temp 10°C – 85°C 35°C
Min Delimi 00, 01, 02 00
Hysteresis
(or Hyst HS)
5K – 20K 5K
Hysteresis time 00min – 30min 00min
Time Seq-Mod 00 – 800 hours 00 hours
Block-Time 00min – 30min 00min
Hyst Burner 2 2K – 20K 2K
Gradient On/Off Off
Max reduce 1 – 20K 10K
Dyn cutoff 0.5K/min –
10K/min
2K/min
HS Cool-fct Off/On Off
T-HS Cool 30°C – 120°C 95°C
Use the F button [End] to exit the level
Max T-HS1 (Max. temperature Boiler)
Protects the HS from overheating / prevents
triggering the LIMITER.
!Caution: Also works with hot water preparation.
Min T-HS1/2 (min temperature Boiler)
Decreased condensation build-up in HS with low heat
requirements. Switching the HS off is always done earlier
when achieving the HS minimum temperature MIN T-
HS1/2+ Hysteresis (standard 5K) => see also Min Delimi
Max/Min T-Header (only for cascade)
See Max/Min T-HS 1/2.
Protection from condensate
Warm Up Temp
(Not in cascade operation)
Reduces operation in condensation zone. The circulation
pumps are switched off and the mixers are shut until the
boiler has reached the start-up temperature.
Min Delimi (minimum delimiter HS)
(Not in cascade operation)
Decreased condensation build-up in HS with low heat
requirements. Switching the HS off is always done earlier
when achieving the HS minimum temperature Min T-HS1
+ Hysteresis (5K)
00 = Minimum delimiter for heat curve
The HS switches on if the requested temperature
has been exceeded by the using components.
01 = Minimum delimiter with heat requirement
The HS holds at least the set minimum
temperature Min T-HS1 at heating requirements
(pump release).
02 = Permanent minimum delimiter (24) The HS holds
24h at least the set minimum temperature Min T-
HS1. at heating requirements (Pump release).
Hysteresis with hysteresis time
Function for optimising the boiler operation with differing
heat-generator loads.
The effective switching hysteresis is reduced linearly after
the burner is switched on from the set Hysteresis to the
minimum hysteresis (=5K) during the hysteresis time.
Low heat consumption
In this case the higher Hysteresis setting takes effect.
Short run-times and frequent burner operation are
prevented.
High heat consumption
During longer periods of burner operation (high heating
load) the hysteresis is automatically reduced to 5K. This
prevents the heat generator from heating to
unnecessarily high temperatures.