Technische Alternative HZR 65 User manual

HZR 65
Version P5.6-7 EN
Universal heating controller
Operation
Installation instructions
en

3
Contents:
Safety requirements........................................................................................4
Maintenance.....................................................................................................4
Generally applicable rules ..............................................................................5
Diagram 0: Solid fuel boiler, buffer tank, heating circuit, requirement additional heating..6
Diagram 16: Automatic boiler, hot water tank, heating circuit, burner requirement...........8
Diagram 32: Automatic boiler, (combined) buffer, heating circuit, burner requirement...10
Diagram 48: buffer, hot water tank, heating circuit, burner requirement.........................12
Diagram 64: Solid fuel boiler, buffer, hot water tank, heating circuit..............................14
Diagram 80: Solar power unit, (combined) buffer tank, heating circuit, burner requirement
........................................................................................................................................17
Diagram 96: Boiler (or buffer tank), hot water tank, 2 heating circuits ...........................20
Diagram 112: Heat pump control and requirement, heating circuit pump, solar collector
........................................................................................................................................22
Diagram 128: Buffer tank, heating circuit via pre-mixed district heating pipe, switch-over
valve hot water, heating requirement resp. feed pump....................................................23
Diagram 144: Automatic boiler, tank, mixer for increasing return, heating circuit pump,
burner requirement..........................................................................................................25
Installing instructions ...................................................................................27
Installing the sensor(s) ......................................................................................................27
Installing the unit................................................................................................................28
Electrical connection..........................................................................................................28
Data line (DL) ....................................................................................................................29
Selector switch ..............................................................................................30
Mod (Operating mode) - Par (Parameters)........................................................................34
Room sensor RASPT ........................................................................................................35
Frost protection conditions for heating circuit ....................................................................35
Basic principle of heat curve..................................................................................................36
Setting the time switch function .............................................................................................37
Menu...............................................................................................................39
Mixer control parameter Mr................................................................................................40
Heating circuit pump parameter HPu.................................................................................43
Legionella protection function LES....................................................................................45
Sensor type Sen................................................................................................................46
After-running time PnL.......................................................................................................47
Switching hystereses HSt..................................................................................................48
Pump speed control Pd1, Pd2...........................................................................................49
Technical Data...............................................................................................52
Table of settings............................................................................................53
Instructions for troubleshooting ..................................................................55

4
Safety requirements:
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 fulfills all necessary safety condi-
tions. 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.
► 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. De-
structive and life-threatening voltages at the device and the connected sensors may occur.
► 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. Harsh cleaning agents and solvents
such as chlorethenes or tri-gases are not admissible.
As the components relevant to accuracy are not subjected to loads if used properly, long-
term deviation is very low. The unit thus cannot be adjusted. Hence, no calibration is possi-
ble.
The design characteristics of the unit must not be changed during repairs. Spare parts
must correspond to the original parts used to restore the manufactured condition.

5
Generally applicable rules for the following diagrams:
The hydraulic diagrams of this manual are only diagrams in principle. They do not de-
scribe or replace a professional system development. There is no guarantee for func-
tion if directly copied.
When used for floor and/or wall heaters: Here, a safety thermostat must be used just
as with conventional heater controllers. It has to switch off the heating circuit pump if
there is overheating regardless of the output from the controller to prevent indirect
damage from excess temperatures.
It is necessary to set all „Required settings“ mentioned in the hydraulic diagrams.
"All programs +1 (+2, +4, +8)" indicates that the selected program number can be in-
creased by the sum total of these numbers.
Example: Diagram 16, program 19 (=16+1+2): basic function (automatic boiler, hot
water tank, heating circuit, burner requirement) & boiler priority & switching the burner
requirement over 2 sensors.
The term „heating = active“ in the link formulas describes the conditions specified in
the menu heating pumps parameters “HPu” for additional release resp. blocking condi-
tions of the heating pump and the mixer. According to the factory settings heating
pump and mixer are released, when the calculated nominal flow temperature “Vsoll”
exceeds the minimum flow temperature “Vmin”.
The factory settings cause the heating pump switch-off, when the calculated nominal
flow temperature “Vsoll” falls below the adjusted minimum flow temperature “Vmin”.
The mixer will be closed, when the heating pump is switched off. The temperature
threshold for frost protection mode is set to 5.0°C ex works and the mixer operating
mode to outdoor temperature control (Atr).
Frost protection heating circuit: The heating circuit pump A1 will be switched on
under certain conditions (see chapter “Frost protection conditions for heating circuit”).
Frost protection tanks: According to the program the burner requirement A5 and/or
load pump A2 will be activated when the temperature falls below frost the protection
temperature at a certain sensor. Programs of diagram 64 as well as programs 112,
113, 130 and 131 have no frost protection of tanks.
With activated legionella protection function the thermostat function of the hot water
tank sensor affects the feed pump and the burner requirement.
The potential-free output A5 (situated in the right part of the housing below the sensor
terminals) is mainly arranged for boiler requirement of fossil fuel or pellets boilers. If
this output is used for controlling a pump (e.g. diagram 64), a connection between
supply line (phase L) and output terminal W has to be assembled.
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.

6
Diagram 0: Solid fuel boiler, buffer tank, heating circuit, requirement additional
heating
Sensors
Outputs
T1…. Boiler
A1…. Heat circuit pump
T2…. Tank top
A2…. Tank feed pump
T3…. Tank bottom
A3…. Mixer open
T4…. Heating circuit flow
A4…. Mixer close
T5…. Outdoor temperature
A5…. Burner requirement
T6…. Room sensor
Basic function (P0): Release of heating circuit pump A1 according to boiler and buffer
temperature, activation of buffer feed pump A2, burner requirement applying to buffer.
A1 = (T1> min1 or T2 > min2) & (heating = active)
A2 = T1 > min1 & T1 > T3 + diff1
A5 = T2 < max
A1 off A2 off
T1 < min1 and
T2 < min2 T1 < min1
diff1
A1 on A2 on
Switch-off cond. HPu T3
A1 off
Required settings:
min1 …switch-on thresh. T1 A1,2
min2 … switch-on thresh.T2 A1
max …burner requirement T2 A5
diff1 …boiler T1 – buffer T3 A2
diff2 …see programs 2, 3, 4, 5
Vmax, Vmin
T+20, T-20
Tnorm, Tabs
Mixer control parameter Mr
Heating pump parameter HPu
Time program
Burner
A5
T2 < max
A5… requirement
additional heating

7
Program 1: Burner requirement A5 refers to sensor T3
A5 = T3 < max
Program 2: Separated switch-on and switch-off thresholds for burner requirement.
A5 on = T2 < min2 + diff2
A5 off = T2 > max
Program 3: as program 2, but switch-off threshold refers to T3 (holding circuit).
A5 on = T2 < min2 + diff2
A5 off = T3 > max
Program 4: Burner requirement refers to nominal flow temperature “Vsoll”.
A5 = T2 < Vsoll + diff2 & (heating = active)
Program 5: Separated switch-on and switch-off thresholds for burner requirement. Burner
requirement refers to nominal flow temperature “Vsoll”, switch-off threshold re-
fers to T3 (holding circuit).
A5 on = T2 < Vsoll + diff2 & (heating = active)
A5 off = T3 > Vsoll + diff2

Program 6: Separated switch-on and switch-off thresholds for burner requirement. Burner
requirement refers to nominal flow temperature “Vsoll”
A5 on = T2 < Vsoll + diff2 & (heating = active)
A5 off = T2 > max

Program 7: Separated switch-on and switch-off thresholds for burner requirement. Burner
requirement refers to nominal flow temperature “Vsoll”, switch-off threshold re-
fers to T3 (holding circuit).
A5 on = T2 < Vsoll + diff2 & (heating = active)
A5 off = T3 > max
all programs +8: Burner requirement is only allowed, if solid fuel boiler is cold.
A5 (+8) = T1 < min1 & A5
all programs +160: Heating circuit pump A1 is only released by buffer tank temperature T2
and not by boiler temperature T1.
A1 = T2 > min2 & (heating = active)
Time programs are possible for heating circuit A1 and burner requirement A5

8
Diagram 16: Automatic boiler, hot water tank, heating circuit, burner requirement
Sensors
Outputs
T1…. Boiler
A1…. Heat circuit pump
T2…. Tank top
A2…. Tank feed pump
T3…. Tank bottom
A3…. Mixer open
T4…. Heat circuit flow
A4…. Mixer close
T5…. Outdoor temperature
A5…. Burner requirement
T6…. Room sensor
Basic function (P16): No buffer tank; tank feed pump = A2; burner requirement = A5.
For sliding boiler operation without mixer: It makes sense to set the thresholds min1 and
min2 to 5°C (=no function) and to activate the pump switch-off condition Vsoll < Vmin (Menu
HPu).
Heating not active: Switch-off the burner requirement when nominal tank temperature max is
reached. Tank feed pump is still active until boiler temperature falls below min1 for discharge
of the boiler residual energy.
Required settings:
min1 …switch-on thresh. T1 A1,2 min2 …switch-on thresh. T1 A5
max …limit tank T2 A2,5 diff1 …boiler T1 – tank T2 A2
diff2 …boiler T1 – Vsoll A5
Vmax, Vmin, T+20, T-20, Tnorm, Tabs, mixer control parameter Mr
heating pump parameter HPu, time program tp
A1 off A2 off
T1 < min1 T1 < min1
diff1
A1 on A2 on
Switch-off cond. T2 > max
HPu (if heating = active)
A1 off A2 off
Boiler requirement A5
T2 < max
and
time program (A2)
or
heating active and T1 < min2
or
heating active and T1 < Vsoll + diff2
(Vsoll = nominal flow temperature)
A5 = burner
requirement
Pellets-
or fossil
fuel
boiler

9
A1 = T1 > min1 & (heating = active)
A2 = T1 > min1 & T1 > T2 + diff1 & (T2 < max or (heating = not active))
A5 = (T2 < max & tp(A2)) or ((T1 < min2 or T1 < Vsoll + diff2) & (heating = active))
all programs +1: priority for hot water tank
A1 (+1) = A1 only if not ((T2 < max) & tp(A2))
Together with "all Programs +2" applies:
A1 (+3) = only if not ((T3 < max) & tp(A2))
all programs +2: Separated switch-on and switch-off thresholds for burner requirement A5
(holding-circuit)
A2 = T1 > min1 & T1 > T3 + diff1 & (T3 < max or (heating = not active))
A5 on = (T2 < max & tp(A2)) or ((T1 < min2 or T1 < Vsoll + diff2) & (heating = active))
A5 off = (T3 > max & tp(A2)) & ((T1 > min2 & T1 > Vsoll + diff2) & (heating = active))
all programs +4: as program 16, but feed pump function A2 refers to T2
A2 = T1 > min1 & T1 > T2 + diff1 & T2 < max (independent from heating)
all programs +8: as program 16, but burner requirement is only referring to demand of
heating circuit and tank feeding and not to comparison to boiler temperature.
A5 = (T2 < max & tp(A2)) or (heating = active)
Time programs are possible for heating circuit A1 und hot water requirement A2. For A2
time program tp(A2) manages only on the requirement A5 and not on the feed pump A2.

10
Diagram 32: Automatic boiler, (combined) buffer, heating circuit, burner require-
ment
Sensors
Outputs
T1…. Boiler
A1…. Heating circuit pump
T2…. Tank top
A2…. Tank feed pump
T3…. Tank center
A3…. Mixer open
T4…. Heating circuit flow
A4…. Mixer close
T5…. Outdoor temperature
A5…. Burner requirement
T6…. Room sensor
Basic function (P32): The combined tank is maintained at temperature. Tank feed pump A2;
mixer control A3+A4; burner requirement A5. Sensor T1 is available for eventual speed
control function for boiler flow (A2).
A1 = T3 > min2 & (heating = active)
A2 = T1 > min1 & T1 > T3 + diff1
A5 = T2 < max or (T3 < Vsoll + diff2 & (heating = active))
Required settings:
min1 …switch-on thresh. T1 A2 min2 …switch-on thresh. T3 A1
min2 …additional used with programs 33, 34
max …limit T2 (T3) A5
diff1 …boiler T1 – tank c. T3 A2 diff2 … Vsoll – tank cent. T3 A5
Vmax, Vmin, T+20, T-20, Tnorm, Tabs, mixer control parameter Mr
heating pump parameter HPu, time program
A1 off A2 off
T3 < min2 T1 < min1
diff1
A1 on A2 on
Switch-off cond. HPu T3
A1 off
Burner requirement A5
T2 < max
or
heating active and T3 < Vsoll + diff2
(Vsoll = nominal flow temperature)
A5 = burner
requirement
Pellets-
or fossil
fuel
boiler

11
Program 33: Separated switch-on and switch-off thresholds for burner requirement
A5 on = T2 < min2 + diff2 A5 off = T2 > max
Program 34: as program 33, but switch-off threshold on T3 (holding-circuit).
A5 on = T2 < min2 + diff2 A5 off = T3 > max
Program 35: Holding circuit with difference on nominal flow temperature Vsoll
A1 = T2 > min2 & (heating = active)
A2 = T1 > min1 & T1 > T3 + diff1
A5 on = T2 < max or (T2 < Vsoll + diff1 & (heating = active))
A5 off = T2 > max & (T3 > Vsoll + diff2 & (heating = active))
Program 36: Heating circuit pump and burner requirement are separated.
A1 = T2 > min2 & (heating = active)
A2 = T1 > min1 & T1 > T3 + diff1
A5 = T3 < max
all programs +8: Buffer feed pump A2 is switched on immediately with burner requirement
(for fuel value units with minimum circulation quantity of water)
A2 = A2 or A5
Time programs are possible for heating circuit A1 and burner requirement A5. For A5 the
time program manages only on the hot water requirement A2, because the burner require-
ment is linked with A1 (heating active).
A1 off A2 off
T2 < min2 T1 < min1
diff1
A1 on A2 on
Switch-off cond. HPu T3
A1 off
Boiler requirement A5
OFF
T2 > max
and heating active & T3 > Vsoll + diff2
(Vsoll = nominal flow temperature)
Boiler requirement A5
ON
T2 < max
or heating active & T2 < Vsoll + diff1

12
Diagram 48: buffer, hot water tank, heating circuit, burner requirement
Sensors
Outputs
T1…. Buffer top
A1…. Heating circuit pump
T2…. freely useable
A2…. Hot water tank feed pump
T3…. Hot water tank bottom
A3…. Mixer open
T4…. Heating circuit flow
A4…. Mixer close
T5…. Outdoor temperature
A5…. Burner requirement
T6…. Room sensor
Basic function (P48): Controlling the heating circuit pump A1; hot water feed pump A2;
burner requirement A5
A1 = T1 > min1 & (heating = active)
A2 = T1 > min1 & T1 > T3 + diff1 & T3 < max
A5 on = T1 < min2
A5 off = T1 > min2 + diff2
Required settings:
min1 …switch-on thresh. T1 A1,2 min2 …switch-on thresh. T1 A5
max …limit hot water tank T3 A2
diff1 …buffer top T1 – hot water tank T3 A2
diff2 … buffer top T1 A5
Vmax, Vmin, T+20, T-20, Tnorm, Tabs, mixer control parameter Mr
heating pump parameter HPu, time program
A1 off A2 off
T1 < min1 T1 < min1
diff1
A1 on A2 on
Switch-off cond. HPu T3 > max
A1 off A2 off
Burner requirement A5
ON
T1 < min2
OFF
T1 > min2 + diff2
A5 = burner
requirement

13
Program 49: as program 48, but switch-off threshold of burner requirement on T2 (holding-
circuit)
A5 on = T1 < min2
A5 off = T2 > min2 + diff2
Program 50: Burner requirement referring to nominal flow temperature Vsoll and T2
A5 = T2 < min2 or T1 < Vsoll + diff2 & (heating = active)
Program 51: as program 50, but in consideration of hot water tank temperature T3
A5 = T3 < min2 or T1 < Vsoll + diff2 & (heating = active)
Program 52: separated sensors for switch-on and switch-off threshold of burner requirement
(holding-circuit)
A5 on = T1 < Vsoll + diff2 & (heating = active)
A5 off = T2 > min2
Program 53: as program 52, but in consideration of the hot water tank temperature T3
(holding-circuit)
A5 on = T3 < max & (T1 < min1 or T1 < T3 + diff1)
or (T1 < Vsoll + diff2 & (heating = active))
A5 off = T2 > min2 & T3 > max
Program 54,55: as programs 52, 53, but A2 (hot water) has priority to A1
A1 (54,55) = A1 only if not ((T3 < max) & tp(A2))
all programs +8: Second heating source besides buffer with sensor T2.
All conditions at T1 apply to T2 too. The higher temperature is active.
All conditions only at T2 remain unchanged.
Example: Program 56 (=48+8)
A1 = (T1 > min1 or T2 > min1) & (heating = active)
A2 = (T1 > min1 or T2 > min1) & (T1 > T3 + diff1 or T2 > T3 + diff1) & T3 < max
A5 on = T1 < min2 and T2 > min2
A5 off = T2 > min2 + diff2 or T1 > min2 + diff2
Example: Program 57 (=49+8)
A1 = (T1 > min1 or T2 > min1) & (heating = active)
A2 = (T1 > min1 or T2 > min1) & (T1 > T3 + diff1 or T2 > T3 + diff1) & T3 < max
A5 on = T1 < min2 and T2 > min2
A5 off = T2 > min2 + diff2
Time programs are possible for A1, A2 and A5. Using program 50, 51 or 53 the time pro-
gram for A5 manages only on burner requirement for hot water service.

14
Diagram 64: Solid fuel boiler, buffer, hot water tank, heating circuit
Sensors
Outputs
T1…. Boiler
A1…. Heating circuit pump
T2…. Buffer top
A2..Hot water tank feed pump
T3…. Hot water tank bottom
A3…. Mixer open
T4…. Heating circuit flow
A4…. Mixer close
T5…. Outdoor temperature
or buffer bottom (all programs +4)
A5…. Buffer feed pump
T6…. Room sensor or buffer bottom (all programs +2)
T7…. Buffer bottom (all programs +1)
Basic function (P64): Enable of heating circuit pump A1, when boiler or buffer tank tem-
perature have exceeded their minimum thresholds; controlling of hot water tank feed pump
A2; mixer control A3 & A4; Controlling of buffer tank feed pump A5.
A1 = (T1 > min1 or T2 > min2) & (heating = active)
A2 = T2 > min2 & T2 > T3 + diff1 & T3 < max
A5 = T1 > min1 & T1 > T2 + diff2
(T5)
(T6)
(T7)
Required settings:
min1 …switch-on thresh. T1 A1,5 min2 … switch-on thresh.T2 A1,2
max …limit hot water tank T3 A2
diff1 …buffer T2 – hw tank T3 A2 diff2 … boiler T1 - buffer T2 A5
Vmax, Vmin, T+20, T-20, Tnorm, Tabs, mixer control parameter Mr
heating pump parameter HPu, time program
A1 off A2 off A5 off
T1 < min1 T2 < min2 T1 < min1
and T2 < min2
diff1 diff2
A1 on A2 on A5 on
Switch-off cond. HPu T3 > max T2
A1 off A2 off

15
all programs +1: Feeding the hot water tank refers to the boiler as to the buffer tank temper-
ature.
A2 = ((T1 > min1 & T1 > T3 + diff1) or (T2 > min2 & T2 > T3 + diff1)) & T3 < max
Sensor 7 for all programs +1:
The function of this program variation can be optimized by a 7th sensor. The sensor T7 must
be the same senor type as sensor T2, i.e. both sensors must be either KTY or PT1000. The
controller switches over from sensor T2 to sensor T7 (tank bottom) when buffer feed pump
A5 is required. As no information exists about the top tank temperature at that time, it is
necessary to use program 65 (64 & 1) to make sure, that the boiler temperature T1 has
alternative information for switching hot water tank pump A2.
Schematic wiring diagram and operation mode:
The temperature of sensor T7 is displayed instead of sensor T2 when output A5 is active.
A1 off A2 off A2 off A5 off
T1 < min1 T2 < min2 or T1 < min1 T1 < min1
and T2 < min2
diff1 diff 1 diff2
A1 on A2 on A2 on A5 on
Switch-off cond. HPu T3 > max T2 (T7)
A1 off A2 off

16
all programs +2: Sensor T6 is not employed as room sensor, but as reference sensor for
feeding buffer tank (tank bottom).
Note: T6 must be set as standard sensor (Std) (see selector switch position Mod –Par).
In position “Par” the use of sensor T6 must be set:
rAS T6 is used as room sensor
Std T6 is no room sensor, frost protection at T5 keeps active
Setting in menu mixer control parameter „Mr“: Atr = outdoor temperature control or Fir =
fixed value control
A5 = T1 > min1 & T1 > T6 + diff2
all programs +4: Sensor T5 is not employed as room sensor, but as reference sensor for
feeding buffer tank (tank bottom). Outdoor temperature control for heating circuit is not possi-
ble (not usable with „all programs +2).
Note: Setting in menu mixer control parameter “Mr”: Fir = fixed value control, or using a room
sensor rtr =room temperature control.
A5 = T1 > min1 & T1 > T5 + diff2
all programs +8: Potential free contact A5 is linked out with output A2.
all programs +160: Heating circuit pump is enabled only by buffer tank temperature T2 and
not by boiler temperature T1.
A1 = T2 > min2 & (heating = active)
similar programs to diagram above: see program 85 and 86 (after diagram 80)
Time programs are possible for heating circuit A1 and hot water tank feeding A2

17
Diagram 80: Solar power unit, (combined) buffer tank, heating circuit, burner
requirement
Sensors
Outputs
T1…. Collector
A1…. Heating circuit pump
T2…. Tank top
A2…. Solar pump
T3…. Tank bottom
A3…. Mixer open
T4…. Heating circuit flow
A4…. Mixer close
T5…. Outdoor temperature
A5…. Burner requirement
T6…. Room sensor
Basic function (P80): Enable of heating circuit pump by minimum threshold min1 at sensor
T2; control of solar pump A2 and burner requirement A5.
A1 = T2 > min1 & (heating = active)
A2 = T1 > T3 + diff1 & T3 < max
A5 = T2 < min2
Program 81: Burner requirement referring to nominal flow temperature Vsoll; time program
for A1 defines the burner requirement for heating circuit, time program linked with A5 hot
water service.
A5 = T2 < min2 or (T2 < Vsoll + diff2 & (heating = active))
Required settings:
min1 …switch-on thresh. T2 A1
min2 …switch-on thresh. T2 A5
max …limit tank bottom T3 A2
diff1 …Coll. T1 – Tk.bottom T3 A2
diff2 …see progr.81 (T2-Vsoll) A5
Vmax, Vmin
T+20, T-20
Tnorm, Tabs
mixer control parameter Mr
heating circuit pump parameter HPu
time program
A1 off
T2 < min1 T1
diff1
A1 on A2 on
Switch-off cond. HPu T3 > max
A1 off A2 off
Burner
A5
T2 < min2
A5 = burner
requirement

18
Program 82: Instead of burner requirement (program 80) A5 is a hot water tank feed
pump. Sensor T6 is no room sensor, but a tank sensor. Note: T6 must be set as standard
sensor (Std) (see selector switch position Mod –Par). In position “Par” the use of sensor T6
must be set:
rAS T6 is used as room sensor
Std T6 is no room sensor, frost protection at T5 keeps active
Setting in menu mixer control parameter „Mr“: Atr = outdoor temperature control or Fir =
fixed value control
A5 = T2 > min1 & T2 > T6 + diff2 & T6 < min2
Program 83: A5 is a hot water tank feed pump. Therefore the sensor T6 is situated in the
boiler. Note: T6 must be set as standard sensor (Std) (see selector switch position Mod –
Par).
Heating circuit pump A1 is enabled by buffer tank or boiler temperature.
A1 = T2 > min1 or T6 > min2 & (heating = active)
A5 = T6 > min2 & T6 > T3 + diff2
Program 84: Enable of heating circuit pump A1 without observance of any energy source
temperature. A5 is a feed pump between T2 and T3 without maximum threshold.
A1 = (heating = active)
A2 = T1 > T3 + diff1 & T3 < max
A5 = T2 < min2 & (T2 > T3 + diff2)
A1 off A5 off
T2 < min1 T1 T2 < min1
diff1 diff2
A1 on A2 on A5 on
Switch-off cond. HPu T3 > max T6 > min2
A1 off A2 off A5 off

19
Program 85: A5 is a feed pump between boiler and buffer tank T2; A2 is the feed pump
between boiler and hot water tank T3.
A1 = T2 > min2 & (heating = active)
A2 = T1 > min1 & T1 > T3 + diff1 & T3 < max
A5 = T1 > min1 & (T1 > T2 + diff2)
Program 86: A1 and A2 as program 85, but A5 refers to T6 (no room sensor). Note: T6
must be set as standard sensor (Std) (see selector switch position Mod –Par).
A5 = T1 > min1 & (T1 > T6 + diff2)
Time programs are possible for heating circuit A1, solar circuit A2 and burner requirement
A5.
A1 off A2 off A5 off
T2 < min2 T1 < min1 T1 < min1
diff1 diff2
A1 on A2 on A5 on
Switch-off cond. HPu T3 > max T2
A1 off A2 off

20
Diagram 96: Boiler (or buffer tank), hot water tank, 2 heating circuits
Sensors
Outputs
T1…. Boiler
A1…. Heating circuit pump 1
T2…. Heating circuit 2 return
A2…. Heating circuit pump 2
T3…. Tank bottom
A3…. Mixer open
T4…. Heating circuit 1 flow
A4…. Mixer close
T5…. Outdoor temperature
A5…. Tank feed pump
T6…. Room sensor
Basic function (P96): Controlling of heating circuit pump A1, A2 and hot water tank feed
pump A5: mixer control for heating circuit 1 (A3&A4); controlling of the second heating circuit
can be reached by absolute value control of pump speed control.
A1 = T1 > min1 & (heating = active)
A2 = T1 > min1 & T1 > T2 + diff1 & T2 < min2
A5 = T1 > min1 & T1 > T3 + diff2 & T3 < max
Required settings:
min1 …switch-on thresh. T1 A1,2 min2 …limit T2 A2
max …limit tank bottom T3 A5
diff1 …boiler T1 –h.c.2 T2 A2 diff2 … boiler T1 –tk. bott. T3 A5
Vmax, Vmin, T+20, T-20, Tnorm, Tabs, mixer control parameter Mr
heating pump parameter HPu, time program,
optionally: pump speed control Pd2 for heating circuit pump A2
A1 off A2 off A5 off
T1 < min1 T1 < min1 T1 < min1
diff1 diff2
A1 on A2 on A5 on
Switch-off cond. HPu T2 > min2 T3 > max
A1 off A2 off A5 off