Technische Alternative UVR 63 User manual

UVR63
Version 2.2 EN
Triple-loop universal controller
Operation
Installation instructions
en

This instruction manual is available in English at www.ta.co.at.
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verfügbar.
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internetowej www.ta.co.at.

4
Table of contents
Safety requirements...............................................................................................................6
Maintenance.................................................................................................................................... 6
Generally applicable rules for the proper use of this unit .......................................................... 7
Setting for "Step by step" control ........................................................................................8
Hydraulic diagrams................................................................................................................9
Programs with displayed diagrams ............................................................................................ 10
Program 0 - Single solar power system = factory settings ....................................................... 11
Program 4 – Simple drain-back - solar thermal system with valve............................................. 11
Program 16 - Loading the tank from the boiler........................................................................... 12
Program 32 - Burner requirement via tank sensors ................................................................... 12
Program 48 - Solar power system with 2 consumers................................................................. 13
Program 64 - Solar power system with 2 collector panels ......................................................... 14
Program 80 - Single solar power system and tank load from boiler........................................... 15
Program 96 - Buffer and hot water tank load via boiler fired with solid fuel ............................... 16
Program 112 - 2 independent differential loops ......................................................................... 17
Program 128- Burner requirement and solar power system (or feed pump)............................. 18
Program 144 - Solar power system with layered storage tank loading ...................................... 19
Program 160 - Inserting two boilers into the heating system ..................................................... 20
Program 176 - Solar power system with 2 consumers and feed pump function ........................ 21
Program 192 - Solar power system with 2 consumers and feed pump (heating boiler)............. 22
Program 208 - Solar power system with 2 consumers and burner requirement ........................ 23
Program 224 - Solar power system with 3 consumers............................................................... 24
Program 240 - Solar power system with 2 collector panels and 2 consumers........................... 26
Program 256 - Solar power system with 2 collector panels (1 pump, 2 stop valves) ................. 27
Program 272 - Solar power system with 2 collector panels and feed pump function................. 28
Program 288 - Solar power system with 2 collector panels and burner requirement................. 29
Program 304 - Solar power system with 2 collector panels + feed pump (boiler) ..................... 30
Program 320 - layered tank and load pump ............................................................................... 31
Program 336 - Solar system with 2 consumers and layered tank charging ............................... 32
Program 352 - Layered tank and burner requirement ................................................................ 33
Program 368 - Layered tank and feed pump function ................................................................ 34
Program 384 - Layered storage with bypass function ................................................................ 35
Program 400 - Solar power system with 1 consumer and 2 feed pump functions ..................... 36
Program 416 - 1 consumer, 2 feed pump functions, and burner requirement............................ 37
Program 432 - Solar power system, burner requirement, and one feed pump .......................... 38
Program 448 - Burner requirement and 2 feed pump functions ................................................. 40
Program 464 - Solar power system with 2 consumers and bypass function.............................. 42
Program 480 - 2 consumers and 3 feed pump functions ........................................................... 43
Program 496 - 1 consumer and 3 feed pump functions ............................................................. 45
Program 512 - 3 independent differential loops ......................................................................... 46
Program 528 - 2 independent differential loops and independent burner requirement .............. 47
Program 544 - Cascade: S1 S2 S3 S4 ........................................................................ 48
Program 560 - Cascade: S1 S2 / S3 S4 S5.............................................................. 49
Program 576 - Cascade: S4 S1 S2 + burner requirement ................................................ 50
Program 592 - 2 generators on 2 consumers + independent differential loop ........................... 51
Program 608 - 2 generators on 2 consumers + burner requirement.......................................... 53
Program 624 - Solar power system with one consumer and swimming pool............................ 55
Program 640 - Preparation of hot water including circulation and solar power system.............. 56
Program 656 - Preparation of hot water including circulation and burner requirement .............. 57
Program 672 - 3 generators to 1 consumer + difference circuit + burner requirement .............. 58
Installation instructions.......................................................................................................59
Installing the sensors................................................................................................................... 59
Sensor lines................................................................................................................................... 60
Installing the unit.......................................................................................................................... 61
Electrical connection.................................................................................................................... 61
Special connections ................................................................................................................... 62

5
Operation..............................................................................................................................63
The main level................................................................................................................................64
Changing a value (parameter).................................................................................................... 66
Use the arrow key up to save the value......................................................................................66
The parameter menu PAR ............................................................................................................67
Brief description:......................................................................................................................... 68
Code number CODE................................................................................................................... 69
Software version VER................................................................................................................. 69
Program number PR................................................................................................................... 69
Linking of outputs LO.................................................................................................................. 69
Priority assignment PA ............................................................................................................... 70
Set values (max, min, diff).......................................................................................................... 70
Time............................................................................................................................................ 73
DATE.......................................................................................................................................... 73
Time window TIME W (3 times).................................................................................................. 74
Timer function TIMER................................................................................................................. 75
Assignment of free outputs A2/A3 <= OFF................................................................................. 76
Automatic / manual mode ........................................................................................................... 77
O AUTO ................................................................................................................................. 77
C AUTO ................................................................................................................................. 77
The menu MEN ..............................................................................................................................78
Brief description.......................................................................................................................... 79
Language DEUT, ENGL, INTER ................................................................................................ 80
Code number CODE................................................................................................................... 80
Sensor menu SENSOR.............................................................................................................. 80
Sensor settings ...................................................................................................................... 81
Sensor type............................................................................................................................ 82
Creating a mean (average) AV .............................................................................................. 83
System protection function SYS PF............................................................................................ 83
Collector excess temperature limit CET................................................................................. 84
Collector frost protection FROST........................................................................................... 85
Collector cooling function COOLF.......................................................................................... 86
Anti-blocking protection ASC ................................................................................................. 87
Start function STARTF (ideal for tube collectors) ....................................................................... 88
Priority PRIOR............................................................................................................................ 90
After-running time ART............................................................................................................... 92
Pump speed control PSC ........................................................................................................... 93
Control output COP 0-10 V / PWM (twice) ................................................................................ 94
Absolute value control............................................................................................................ 97
Differential control .................................................................................................................. 98
Event control .......................................................................................................................... 99
Function check F CHCK........................................................................................................... 102
Heat quantity counter HQC (3 times)........................................................................................ 103
Legionella function LEGION..................................................................................................... 109
External sensors EXT DL ......................................................................................................... 110
Drain-Back Function DRAINB................................................................................................... 111
Status display Status.............................................................................................................114
Troubleshooting ................................................................................................................116
Table of settings ................................................................................................................117
Technical data....................................................................................................................121

6
Safety requirements
These instructions are intended exclusively for authorised
professionals. All installation and wiring work on the controller must
only be carried out in a zero-volts state.
The opening, connection and commissioning of the device may only be
carried out by competent personnel. In so doing, all local security
requirements must be adhered to.
The device corresponds to the latest state of the art and fulfils all necessary safety
conditions. It may only be used or deployed in accordance with the technical data and the
safety conditions and rules listed below. When using the device, the legal and safety
regulations apposite to the particular use are also to be observed. Incorrect use will result in
the negation of any liability claims.
►The device must only be installed in a dry interior room.
►It must be possible to isolate the controller from the mains using an all-pole isolating
device (plug/socket or double pole isolator).
►Before starting installation or wiring work, the controller must be completely isolated from
the mains voltage and protected against being switched back on. Never interchange the
safety extra-low voltage connections (sensor connections) with the 230V connections.
Destructive and life-threatening voltages at the device and the connected sensors may
occur.
►Solar thermal systems can become very hot. Consequently there is a risk of burns. Take
care when fitting temperature sensors!
►For safety reasons, the system should only be left in manual mode when testing. In this
operating mode, no maximum temperatures or sensor functions are monitored.
►Safe operation is no longer possible if the controller or connected equipment exhibits
visual damage, no longer functions or has been stored for a lengthy period of time under
unsuitable conditions. If this is the case, place the controller and equipment out of service
and secure against unintentional use.
Maintenance
The system does not require maintenance if handled and used properly. Use a cloth
moistened with soft alcohol (such as spirit) to clean. Do not use cleansers and/or solvents
such as trichlorethene.
As none of the components relevant to accuracy are under loads when used properly,
they have a long service life without much drift. The unit thus does not have any adjustment
options. No adjustments are needed.
The design characteristics of the unit must not be changed during repairs. Spare parts
must correspond to the original spare parts and be as good as new.

7
Generally applicable rulesfor the proper use of this unit
The manufacturer’s warranty does not cover any indirect damage to the unit if the
mechanic installing the unit does not equip it with any additional electromagnetic devices
(thermostat, possibly in combination with a one-way valve) to protect the unit from damage
from malfunction under the following conditions:
Swimming pool system: If used with a high-performance collector and heat-sensitive
components (such as plastic lines), the supply line must have a excess temperature
thermostat with all of the necessary self-closing valves (closed when current less). The
controller’s pump output can provide this as well. Hence, all heat-sensitive parts would be
protected from overheating if the system were not running, even if steam were created in the
unit due to stagnation. This technique is mandatory, especially in systems with heat
exchangers, as a failure of the secondary pump might cause great damage to the plastic
tubes.
Conventional solar power systems with an external heat exchanger: in such systems, the
secondary heat transfer medium is usually pure water. If the pump runs at temperatures
below freezing because the controller fails, the heat exchanger and other components may
be damaged due to freezing. In this case, a thermostat must be installed on the supply line of
the secondary side after the heat exchanger to stop the primary pump automatically when the
temperature falls below 5°C, regardless of the output of the controller.
When used for floor and wall heaters: here, a safety thermostat must be used just as with
conventional heater controllers. It has to switch off the heating loop pump if there is
overheating regardless of the output from the controller to prevent indirect damage from
excess temperatures.
Solar power systems - tips on system standstill (stagnation):
Generally, stagnation is not a problem and cannot be ruled out if there is a power outage,
for instance. In the summer, the controller’s storage limit may switch off the system
repeatedly. Every system must thus be intrinsically safe. If the expansion container is
properly designed, this is ensured. Tests have shown that the heat transfer medium
(antifreeze) is under less stress during stagnation than when it is just below the steam phase.
All of the data sheets of the collector manufacturers list standstill temperatures above
200°C. However, these temperatures generally only occur during operation with dry steam,
i.e. when the heat exchange medium has completely turned to steam in the collector or the
collector has been completely emptied due to steam. The damp steam then dries quickly and
is no longer able to conduct heat. Hence, it can be assumed that these high temperature
cannot occur at the measuring point of the collector sensor (when installed in the collector
tube as usual) as the remaining thermal line would cool down the temperature via the metal
connections between the absorber and the sensor.

8
Setting for "Step by step" control
Even if you receive an instruction to set the control here, you must read
the operating manual - in particular the chapters „Program selection" and
"Set values".
Menu
1 Selection of the hydraulic diagram based on the system diagram. Observe
the arrow diagrams and "formulae", as well as the program expansions
"+1", "+2", "+4" and "+8", insofar as they are specified in the diagram.
2 Program number selection. In some cases it also makes sense to select
one or more options "+1", "+2", "+4" or "+8", to achieve optimum control.
3 Connection of the sensors to the inputs and the pumps, valves etc. to the
outputs exactly according to the selected diagram; if used: connection of
the data link (DL-bus) and the control outputs
4 PAR Access to the parameter menu, input of code number 32 and input of the
program number PR, restart with loading of factory setting
5 PAR Consideration of whether an output should be crossed out, sub-menu input
"LO".
As only one output 1 can be speed-regulated, crossing-out may sometimes
be necessary in order to control the speed of a specific pump.
6 PAR Selection of the priority allocation in the sub-menu "PA", if required
7 PAR Entry of the necessary setting values max, min, diff corresponding to the
list for the selected diagram or program
8 PAR Setting of time and date
9 PAR If necessary, input of time windows TIME W or activation of the timer
10 PAR By selecting O ON or O OFF you can permanently switch the outputs on or
off and check whether the connections are correct. After this check, all
outputs must again be set to O AUTO.
11 PAR By selecting C ON or C OFF you can permanently switch the control
outputs between 10V and 0 V and thus check the operation of the control
outputs (if in use). After this check, all control outputs must again be set to
C AUTO.
12 MEN If standard sensors PT1000 are not being used, the sensor settings must
be changed in the menu "SENSOR" (e.g. if KTY sensors are being used).
13 MEN If necessary, activate additional functions (e.g. start function, cooling
function, speed control, heat quantity counter, etc.)
14 Check all displayed sensor values for plausibility. Any disconnected or
incorrectly parameterized sensors display 999°C.

9
Hydraulic diagrams
The hydraulic schemas in this booklet are representative diagrams that illustrate the
principles involved. They are for the purpose of correct choice of program but do not
in any way replace the specialized planning of a system, which is why copying them
does not guarantee that they will function.
Warning: Before using the hydraulic schemas it is absolutely necessary to read the
operating instructions and in particular the chapters "Choice of Program" and "Set
values".
The following functions can be used additionally with every program diagram:
Pump after-running time, Pump speed control, 0 – 10V or PWM output, System
function control, Heat counter, Legionella protection function, Anti-blocking
protection
The following functions only make sense together with solar systems:
Collector excess temperature delimiter, frost protection function, Start function,
Solar priority, Collector re-cooling function, Drain-back function (only for drain-
back systems)
The outputs A2 and/or A3 from diagrams which do not use these outputs, can be
logically linked (AND, OR) in the menu "Par" with other outputs or used as a time switch
output.
In diagrams with a holding circuit (= burner requirement with a sensor, shut-down
function with another one), the shut-down transducer is “dominant”. In other words, if
improper parameters or sensor installation leads to the fulfillment of both the shut-on and
shut-off conditions, the shut-off condition has priority.
The factory setting for the adjustment values (max, min, diff) is appropriately matched to
the diagrams, but must however be checked prior to commissioning and matched to the
individual requirements. The specific adjustment values are only loaded, if after setting
the program number, the factory setting is reloaded (press the bottom key (entry) while
plugging in). Only then should the controller be parameterised.
For programs, for which it is not possible to display a diagram in the display, the upper
area remains empty. For some programs, the display was only approximately matched to
the actual diagram, individual symbols may be missing.
Pump valve system of the programs 49, 177, 193, 209, 225, 226, 227, 417, 625:
Speed control (if activated):
Control output COP 1: The speed control only operates when filling tank 1. If max1
is exceeded on the sensor 2 (filling tank 2 or 3), the pump is operated on the highest
speed.
Depending on the output mode, the highest speed complies with analogue stage 100
(modes 0-100, MAX = 100)) or analogue stage 0 (modes 100-0, MAX = 100)).
Control output COP 2: The speed control affects all tanks during filling.
PSC (for standard pumps only): The speed control only operates when filling tank 1.

10
Programs with displayed diagrams
0 1 4
16 17
32 33
48 49 50 51 52 53 54 55
64 65 66 67 68 69 70 71
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
96 97 98 99
112
128 129 130 131
144 145
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191
192 193 194 195 196 197 198 199
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
240 241
256 257 258 259
272 273 274275
288 289 290 291 292 293 294 295
304 305 306307
320 321 328 329
336 338 340 342
352 353 356 357 360 361 364 365
368 369
384385
400 401 402 403
416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431
432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447
448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463
464 465 466 467 468 469 470 471
480481
496
512513
528529
544
560561
576577
592593
608 609 610 611 612 613 616 617 618 619 620 621
624 625 626 627 628 629 630 631
640 641 644
656 657 658 659
672 673 674 675

11
Program 0 - Single solar power system = factory settings
Program 0: Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
All programs +1:
In addition, if S3 exceeds the threshold max2, pump A1 is switched off.
Program 4 – Simple drain-back - solar thermal system with valve
This program can only be selected with activated drain-back function (menu MEN - DRAINB)
selected.
The basic settings are made as in program 0:
During the day, a valve on output A3 prevents the flowing away of the heat transfer medium
out of the collector.
Once the filling time has elapsed, output A3 for the valve is on.
If pump A1 is shut-off due to the temperature difference valve A3 remains open for a further
2 hours.
However the valve is immediately closed if the collector temperature protection or frost
protection function becomes active, the radiation value falls below 50W/m² with the pump
shut down (only if a radiation sensor is being used) of if low water protection is activated and
the set volume flow is not reached after the filling time.
S1
min1
S2
max1
diff1
A1
Required settings:
max1 … limit TK S2 A1
max2 … see all programs +1
min1 … switch-on temp. coll . S1 A1
diff1 … coll. S1 – TK S2 A1
S1
S2
A1
S3
S3 for program +1
S1
min1
S2
max1
diff1
A1
Required settings:
max1 … limit TK S2 A1
max2 … see all programs +1
min1 … switch-on temp. coll . S1 A1
diff1 … coll. S1 – TK S2 A1

12
Program 16 - Loading the tank from the boiler
Program 16: Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
All programs +1:
In addition, if S3 exceeds the threshold max2, pump A1 is switched off.
Program 32 - Burner requirement via tank sensors
Program 32:
The output A3 switches on if S2 falls below the threshold min3.
The output A3 switches off (dominant) if S1 exceeds the threshold max3.
A3 (on) = S2 < min3 A3 (off) = S1 > max3
All programs +1:
The burner request (A3) is only made via S2.
The output A3 switches on if S2 falls below the threshold min3.
The output A3 switches off (dominant) if S2 exceeds the threshold max3.
A3 (on) = S2 < min3 A3 (off) = S2 > max3
Required settings:
max3 … burner req. off SP S1 A3
min3 … burner req. on SP S2 A3
Burner
A3
S2 min3
S1 max3
S1
min1
S2
max1
diff1
A1
Required settings:
max1 … limit TK S2 A1
max2 … see all programs +1
min1 … switch-on temp. boiler S1 A1
diff1 … burner S1 – TK S2 A1
S1 A3
S2
S3
S2
S1
A1
S3 for program +1

13
Program 48 - Solar power system with 2 consumers
Program 48: Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
Pump A2 runs when:
S1 is greater than the threshold min1 and S1 is greater than S3 by the difference diff2
and S3 has not exceeded the threshold max2.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = S1 > (S3 + diff2) & S1 > min1 & S3 < max2
All programs +1:
Instead of the two pumps, one pump and a three-way valve are used (pump-valve system).
Speed control: Observe the comments on page 9!
Without a priority allocation, tank 2 is filled by priority.
A1 ... common pump A2 ... Valve (A2/S receives power when filling tank TK2)
All programs +2:
In addition, if S4 exceeds the threshold max3, pump A1 is switched off.
All programs +4: Both solar loops have separate switch-on thresholds at S1:
output A1 retains min1, and A2 switches at min2.
The priorities for TK1 and TK2 can be set in the parameter menu under PA. In addition, a
solar priority function can be set for this diagram in the menu PRIOR (see “solar priorities” for
more details).
S1
min1
S2 S3
max1 max2
diff2
A2
diff1
A1
Required settings:
max1 … limit TK1 S2 A1
max2 … limit TK2 S3 A2
max3 … see all programs +2
min1 … switch-on temp. coll. S1 A1, A2
min2 … see all programs +4
diff1 … coll. S1 – TK1 S2 A1
diff2 … coll. S1
–
TK2 S3 
A
2
S1
S2 S3
S4
A1 A2
SP1 SP2
S4
TK1 TK2
S4 for program +2

14
Program 64 - Solar power system with 2 collector panels
Only one collector field
portrayable
Program 64: Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S3 by the difference diff1
and S3 has not exceeded the threshold max1.
Pump A2 runs when:
S2 is greater than the threshold min2 and S2 is greater than S3 by the difference diff1
and S3 has not exceeded the threshold max1.
A1 = S1> (S3 + diff1) & S1 > min1 & S3 < max1
A2 = S2> (S3 + diff1) & S2 > min2 & S3 < max1
All programs +1:
If the difference between collector sensors S1 and S2 exceeds the difference diff3, the
colder collector is switched off. This prevents heat from being lost in the colder collector when
temperatures are mixed.
All programs +2:
In addition, if S4 exceeds the threshold max2, pumps A1 and A2 are switched off.
All programs +4:
Instead of the pumps, one pump A1 and a three-way valve A2 are used.
WARNING: This program is not intended for systems with two collector fields, since through
a three-way valve one collector field is always operated at standstill.
Note: The additional application of the priority circuit "All programs +1" is recommended.
A1 ... common pump A2 ... valve
S1 S2
min1 min2
S3
max1
diff1
A2
diff1
A1
Required settings:
max1 … limit TK S3 A1, A2
max2 … see all programs +2
min1 … switch-on temp. coll.1 S1 A1
min2 … switch-on temp. coll.2 S2 A2
diff1 … coll.1 S1 – TK S3 A1
… coll.2 S2 – TK S3 A2
diff3 … see all programs +1
A1 A2
S1 S2
S3
S4
S4 for program +2

15
Program 80 - Single solar power system and tank load from boiler
Program 80: Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
The feed pump A2 runs when:
S3 is greater than the threshold min2 and S3 is greater than S4 by the difference diff2
and S4 has not exceeded the threshold max2.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = S3 > (S4 + diff2) & S3 > min2 & S4 < max2
Program 81 (all programs +1):
Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
S1 S3
min1 min2
S2 S4
max1 max2
diff2
A2
diff1
A1
Required settings:
max1 … limit TK S2 A1
max2 … limit TK S4 A2
max3 … see all programs +4
min1 … switch-on temp. coll. S1 A1
min2 … switch-on temp. boiler S3 A2
diff1 … coll. S1 – TK S2 A1
diff2 … boiler S3 – TK S4 A2
S1 S3
min1 min2
S2
max1
max2
diff2
A2
diff1
A1
Required settings:
max1 … limit TK S2 A1
max2 … limit TK S2 A2
max3 … see all programs +4
min1 … switch-on temp. coll. S1 A1
min2 … switch-on temp. boiler S3 A2
diff1 … coll. S1 – TK S2 A1
diff2 … boiler S3 – TK S2 A2
S1
S2
S3
S4
A1 A2

16
A1
A2
S1
S2
S3
S4
TK1 TK2
The feed pump A2 runs when:
S3 is greater than the threshold min2 and S3 is greater than S2 by the difference diff2
and S2 has not exceeded the threshold max2.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = S3 > (S2 + diff2) & S3 > min2 & S2 < max2
All programs +2:
If sensor S2 has reached max1 (or if S4 has reached threshold max3 along with all programs
+4), pump A2 is switched on, and pump A1 keeps running. This provides a cooling function
for the boiler / heater without causing standstill temperatures in the collector.
All programs +4:
In addition, if S4 exceeds the threshold max3, pump A1 is switched off.
All programs +8: With re-cooling activated (all programs +2) A3 runs concurrently.
Program 96 - Buffer and hot water tank load via boiler fired with solid fuel
Program 96: Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
Feed pump A2 runs when:
S3 is greater than the threshold min2 and S3 is greater than S4 by the difference diff2
and S4 has not exceeded the threshold max2.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = S3 > (S4 + diff2) & S3 > min2 & S4 < max2
S1 S3
min1 min2
S2 S4
max1 max2
diff2
A2
diff1
A1
Required settings:
max1 … limit TK1 S2 A1
max2 … limit TK2 S4 A2
max3 … see all programs +2
min1 … switch-on temp. boiler S1 A1
min2 … switch-on temp TK1. S3 A2
min3 … see all programs +2
diff1 … boiler S1 – TK1 S2 A1
diff2 … TK1 S3 – TK2 S4 A2
diff3 … see all programs +1, +2

17
All programs +1:In additional, hot water tank load pump A2 also switches on via the heater
boiler temperature S1.
Pump A2 runs when:
S1 is greater than the threshold min1 and S1 is greater than S4 by the difference diff3
and S4 has not exceeded the threshold max2
or S3 is greater than threshold min2 and S3 is greater than S4 by the difference diff
and S4 has not exceeded max2.
A2 = (S1 > (S4 + diff3) & S1 > min1 & S4 < max2)
or (S3>(S4+diff2) & S3 > min2 & S4 < max2)
All programs+2: The pump A3 runs if:
S5 is greater than threshold min3 and S5 is higher than S6 by the difference diff3
and S6 has not exceeded threshold max3
A3 = S5 > (S6 + diff3) & S5 > min3 & S6 < max3
Program 112 - 2 independent differential loops
Example: Solar thermal system with return flow booster
Program 112: Pump A1 runs, if:
S1 is greater than threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
The output A2 switches on, if:
S3 is greater than threshold min2 and S3 is greater than S4 by the difference diff2
and S4 has not exceeded the threshold max2.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = S3 > (S4 + diff2) & S3 > min2 & S4 < max2
S1
S2
A1
S1
S3
S4
A2
S1 S3
min1 min2
S2 S4
max1 max2
diff2
A2
diff1
A1
required settings:
max1 … limit TK S2 A1
max2 … return limit S4 A2
min1 … switch-on temp. coll. S1 A1
min2 … switch-on temp. TK top S3 A2
diff1 … coll. S1 – TK S2 A1
diff2 … TK S3 – return S4 A2

18
Program 128- Burner requirement and solar power system (or feed pump)
No symbol for S3
Program 128: Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
Output A3 switches on when S4 falls below threshold min3.
Output A3 switches off (dominant) when S3 exceeds max3.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A3 (on) = S4 < min3 A3 (off) = S3 > max3
All programs +1:
The burner requirement (A3) only occurs via sensor S4.
Output A3 switches on when S4 falls below threshold min3.
Output A3 switches off (dominant) when S4 exceeds max3.
A3 (on) = S4 < min3 A3 (off) = S4 > max3
All programs +2:
In addition, pump A1 switches between sensors S4 and S2 (such as oil boiler - buffer - tank
system) when difference diff2 is reached.
Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1,
or S4 is greater than threshold min2 and S4 is greater than S2 by the difference diff2
and S2 has not exceeded max2.
A1 = (S1 > (S2 + diff1) & S1 > min1 & S2 < max1)
or (S4 > (S2 + diff2) & S4 > min2 & S2 < max1)
Required settings:
max1 … limit TK S2 A1
max3 … burner req. off SP S3 A3
min1 … switch-on temp. coll. S1 A1
min2 … see all programs +2
min3 … burner req. on TK S4 A3
diff1 … collector S1 – TK S2 A1
diff2 … see all programs +2
S1
min1
S2
max1
diff1
A1
Burner
A3
S4 min3
S3 max3
A1
S1
S2
S3
S4
A3

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Program 144 - Solar power system with layered storage tank loading
A layered system only makes sense if the speed control is activated!
(Absolute value control system: AC N1)
No symbol for S3 and
heat exchanger
Program 144: Solar pumps A1 run when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
The three-way valve A2 switches up when:
S3 is greater than the threshold min2 or S3 is greater than S4 by the difference diff2
and S4 has not exceeded the threshold max2.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = (S3 > min2 or S3 > (S4 + diff2)) & S4 < max2
Program 145:
If S4 has reached max2, the quick warm-up phase has been completed, and the speed
control is thus blocked optimal efficiency.
If PSC (pump speed control) is activated, the speed level is set to the maximum level, if
control output 1 is activated; the analog level for the maximum speed is output. Control
output 2 is not changed and continues control.
S2
S4
A1
S3 A2
A1
S1
S1 S3 S3
min1 <min2 >min2
A2
S2 S4 S4
max1 max2 max2
diff2
A2
diff1
A1
Required settings:
max1 … limit TK S2 A1
max2 … limit TK S4 A2
min1 … switch-on temp. coll. S1 A1
min2 … switch-on temp. supply l. S3 A2
diff1 … collector S1 – TK S2 A1
diff2 … supply line S3 – TK S4 A2

20
Program 160 - Inserting two boilers into the heating system
Program 160: Feed pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
Feed pump A2 runs when:
S5 is greater than the threshold min2 and S5 is greater than S3 by the difference diff2
and S3 has not exceeded the threshold max2.
Output A3 switches on when S4 falls below threshold min3.
Output A3 switches off (dominant) when S3 exceeds max3.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = S5 > (S3 + diff2) & S5 > min2 & S3 < max2
A3(on)=S4<min3 A3 (off) = S3 > max3
All programs +1: The burner requirement (A3) only occurs via sensor S4.
A3(on)=S4<min3 A3 (off) = S4 > max3 (dominant)
All programs +2: The burner requirement (A3) is only admissible if pump A1 is switched off.
All programs +4 (only makes sense together with “all programs+2”): Feed pump A2 runs
when:
S5 is greater than the threshold min2 and S5 is greater than S4 by the difference diff2
and S4 has not exceeded the threshold max2.
All programs +8 (additional sensor S6): If S6 exceeds the threshold max1 (no longer on
S2!) A3 (burner requirement) is switched off. The sensor S6 is fitted to the flue tube or can be
replaced with a flue-gas thermostat.
A1 A2
S1
S2
S3
S5
A3
S4
Required settings:
max1 … limit TK S2 A1
max2 … limit TK S3 A2
max3 … burner req. off TK S3 A3
min1 … switch-on temp. boiler S1 A1
min2 … switch-on temp. boiler S5 A2
min3 … burner req. on TK S4 A3
diff1 … boiler S1 – TK S2 A1
diff2 … boiler S5 – TK S3 A2
S1 S5
min1 min2
S2 S3
max1 max2
diff1
A1
Burner
A3
S4 min3
S3 max3
diff2
A2