Wolf SM2 User manual

Part no. 30 62 438 Subject to modications 03/09 GB
Installation and
operating instructions
SM2 solar module
"Solar boiler stop"
NEW
WolfGmbH· Postfach 1380· 84048 Mainburg· Tel.08751/74-0 · Fax08751/741600 · Internet:www.wolf-heiztechnik.de

3062438_03092
Index
Safety instructions ......................................................................3
Standards / Regulations .............................................................4
Terminology ................................................................................5
Abbreviations / Equipment description .......................................6
Installation .................................................................................7
DIP switch settings .....................................................................8
Operating modes........................................................................9
System overview ......................................................................10
System description ..............................................................11-13
Electrical connection........................................................... 14-27
Parameter list ...........................................................................28
Parameter description
SOL01 / P01 Start differential solar cylinder 1.........................29
SOL02 / P02 Stop differential solar cylinder 1 .......................29
SOL03 / P03 Collector protection function .............................29
SOL04 / P04 Critical collector temperature............................29
SOL05 / P05 Maximum collector temperature .......................30
SOL06 / P06 Maximum cylinder temperature 1 .....................30
SOL07 / P07 Assigning solar cylinders 1 / 2...........................30
SOL08 / P08 Capturing the heat amount...............................31
SOL09 / P09 Flow rate...........................................................32
SOL10 / P10 Medium selection ...............................................32
SOL11 / P11 BUS feed .............................................................32
SOL12 / P12 System conguration..........................................33
SOL13 / P13 Pump speed control............................................34
SOL14 / P14 Start differential solar cylinder 2 .........................34
SOL14 / P14 Stop differential solar cylinder 2 .........................34
SOL16 / P16
Maximum cylinder temperature, solar cylinder 2
...35
SOL17 / P17 Assigning solar cylinder 2...................................35
SOL18 / P18
Burner blocking in case of return temperature raising
..35
SOL14 / P14 Start differential, return temperature raising.......35
SOL20 / P20 Stop differential, return temperature raising .....35
SOL21 / P21 Priority cylinder...................................................35
SOL22 / P22 Start differential, parallel cylinder operation......36
SOL23 / P23 Differential temperature, bypass operation .......36
SOL24 / P24 Function, output A4...........................................36
SOL25 / P25 Start temperature, thermostat function .............37
SOL26 / P26 Stop differential, thermostat function ................37
SOL27 / P27 Tube collector function ......................................37
SOL28 / P28 Frost protection function ...................................37
SOL50 / P50 Relay test..........................................................38

3062438_0309 3
Safety instructions
The following symbols are used in conjunction with these important
instructions concerning personal safety, as well as operational
reliability.
"Safety instructions" are instructions with which you must comply
exactly, to prevent risks and injuries to individuals and material
losses.
Danger through 'live' electrical components.
Switch OFF the ON/OFF switch before removing the casing.
Never touch electrical components or contacts when the ON/OFF
switch is in the ON position. This results in a risk of electrocution
that may lead to injury or death.
The main supply terminals are 'live' even when the ON/OFF switch
is in the OFF position.
"Note" indicates technical instructions that you must observe to
prevent material losses and boiler malfunctions.
Note
Safety instructions
Auxiliary functions
Blocking cylinder reheating "solar boiler stop" ...................38
Blocking pasteurisation ................................................ 38-39
Anti-seizing pump protection..............................................39
Loading the standard values (reset)...................................39
Maximum cylinder and collector temperature over 24 h ....39
Hours run ...........................................................................39
Resetting values.................................................................39
Fault codes...............................................................................40
Sensor resistances...................................................................41
Specication .............................................................................42
Keyword index.................................................................... 43-44

3062438_03094
Standards / Regulations
- According to DIN EN 50110-1, only qualied electricians may
carry out the installation and commissioning of the heating control
unit and connected accessories.
- Observe all regulations stipulated by your local power supply
utility and all VDE or local regulations.
- DIN VDE 0100 regulations regarding the installation of high
voltage systems up to 1 000 V.
- DIN VDE 0105-100 operation of electrical systems.
Installation /
Commissioning
Warnings - Never remove, bypass or disable safety and monitoring
equipment.
- Only operate the system in perfect technical condition.
Immediately remove / remedy any faults and damage that may
impact on safety.
- Always ensure that cold water is mixed in with hot water, when
the DHW temperature is set above 60 °C (risk of scalding).
Maintenance / Repair - Regularly check the perfect function of all electrical
equipment.
- Only qualied personnel may remove faults or repair damage.
- Only replace faulty components or equipment with original Wolf
spare parts.
- Always maintain specied electrical protection values (see
specication).
Any damage or loss resulting from technical modications to Wolf
control units is excluded from our warranty.
Note
The appliance and control accessories comply with the following
regulations:
EC Directives
- 2006/95/EC Low Voltage Directive
- 2004/108/EC EMC Directive
EN Standards
- EN 60730-1
- EN 55014-2
- EN 60529
Standards / Directives

3062438_0309 5
Collector temperature
The collector temperature is the medium temperature that is
generated by insolation at the collector.
The collector temperature is measured at the ow outlet of the
collector or collector array.
DHW cylinder temperature
The cylinder temperature is the temperature that is measured in the
lower area of the cylinder at the level of the indirect solar coil.
Flow rate
The ow rate is the volume of medium that is transported by the
solar circuit pump through the solar circuit. The ow rate in is
quoted in l/min.
Yield
This is the volume of heat generated by the solar thermal system.
It is calculated from the ow rate and the temperature differential
between the collector and the return temperature. This is a value
that is added up over a certain period (day) or given as overall
total. The yield is quoted in Wh, kWh or MWh.
Output
The heat output represents the volume of heat generated during
a certain period. This value represents a momentary value and
is quoted in kW.
Solar cylinder
The solar cylinder is the cylinder that is heated up by the solar
thermal system.
Solar thermal
Heating up of the cylinder via the solar circuit pump.
Solar circuit pump
The pump that circulates the medium in the solar circuit.
Terminology
Terminology

3062438_03096
Abbreviations / Equipment description
The solar module (SM2) is designed to regulate solar thermal
systems with up to two collector arrays and two solar cylinders.
The system is ne-tuned by selecting from eleven precongured
systems.
Heat metering may be possible, subject to the selected system.
For this, the heat amount can either be captured through
determining the yield by recording the actual ow rate with a heat
meter set (accessory) or by calculating the yield with a specied
ow rate (requires a return sensor).
Parameters can be modied, and values as well as fault codes can
be displayed with the programming modules BM or BM-Solar.
The SM2 has an eBUS interface and can therefore be integrated
into the Wolf control system.
Appliance description
Abbreviations SFK1 - Solar sensor, collector, collector array 1
SFK2 - Solar sensor, collector, collector array 2
SFS1 - Solar sensor solar cylinder 1
SFS2 - Solar sensor solar cylinder 2
RLF - Return sensor
BPF - Bypass sensor
PF - Buffer sensor
DFG - Flow rate transducer
SKP1 - Solar circuit pump 1
SKP2 - Solar circuit pump 2
CIR. - DHW circulation pump
USP - Transfer/de-stratication pump
3WUV1 - Three-way diverter valve 1
3WUV2 - Three-way diverter valve 2
el.V1 - Motorised valve 1
el.V2 - Motorised valve 2
Solar circuit pump 1
Output A1*
Output A2*
Output A3*
eBUS
Fault
* Assignment of outputs subject to the selected system version

3062438_0309 7
Installation
Solar module installation - Remove the solar module from its packaging.
- Mount the solar module directly on the wall.
- Wire up the SM2 solar module in accordance with the wiring
diagram.
Note: Never route on-site cables/leads for temperature
sensor, ow meter and eBUS together with mains power
cables.
Fixing holes
A programming module BM or BM-Solar can be clicked into the
solar module. As an alternative, the programming module can
also be used as a remote control unit in conjunction with a wall
mounting base.
No separate programming module is required if the solar module
is integrated into a Wolf control system that already contains a
programming module BM.
For further details, see the operating instructions of the
programming module BM or BM-Solar.

3062438_03098
DIP switch settings/
Operating modes
DIP switch settings
Switching the solar module
ON / OFF
A 4-pole DIP switch is located inside the solar module casing. This
becomes accessible after removing the cover or the programming
module.
DIP switch 1 enables the module to be switched ON and OFF. The
anti-seizing pump protection continues to be active even when the
module is switched OFF.
DIP switches 2 and 3 are not relevant here.
DIP switch 4 must be set to ON.
a) SM2 as part of a Wolf control system
The SM2 solar module can be integrated into a Wolf control
system. In that case, the solar module will be controlled from
the programming module BM with address 0. An optional
programming module BM-Solar can also be linked to the SM2.
In that case, the system can be controlled from the BM with
address 0 and from the BM-Solar.
Operating modes The SM2 solar module can be operated in different modes.
Factory setting:
If the solar cylinder is assigned to another BM, the system can
also be controlled from that BM. In systems with two cylinders
that are assigned to two different BMs, the solar module can also
be controlled from those two BMs (see parameter description
SOL07 /P07 and SOL17 /P17).
Note:
Only one SM2 can be integrated into any one Wolf control
system.
BM-SolarSM2BM
option
Wolf
boiler
additional Wolf
eBUS users

3062438_0309 9
Operating modes
BM-Solar
BM-Solar
SM2 BM-Solar
b) SM2 (stand alone) with BM-Solar programming module
The module will be controlled by the BM-Solar programming
module.
The BM-Solar can be clicked into the SM2 solar module or
can be used as a remote control on a wall mounting base
(accessory).
c) SM2 (stand alone) without programming module
The solar module is operated without programming module.
Operation and selecting values is then not possible.
The status of outputs and faults can be identi ed by the LEDs
in the enclosure front.

3062438_030910
System overview
The SM2 solar module contains eleven different systems with up to
two solar cylinders and two collector arrays. Parameter 12 - system
conguration enables the selection of the most suitable system.
System
cong-
uration
System Number
of solar
cylinders
Number
of
collector
arrays
1Single circuit system 1 1
2Single circuit system with return temperature
raising for central heating backup
1 1
3Dual-circuit system with two solar cylinders in
parallel operation
2 1
4Dual-circuit system with two solar cylinders with
cylinder priority control
2 1
5Dual-circuit system with two collector arrays and
two solar circuit pumps
1 2
6Dual-circuit system with two collector arrays and
one solar circuit pump
1 2
7Dual-circuit system with two collector arrays, two
solar cylinders with cylinder priority control and
two solar circuit pumps
2 2
8Dual-circuit system with two collector arrays, two
solar cylinders with cylinder priority
control and one solar circuit pump
2 2
9Single circuit system with bypass circuit 1 1
10 Dual-circuit system with two solar cylinders with
cylinder priority control and bypass circuit
2 1
11 Dual-circuit system with two solar cylinders with
parallel cylinder operation with bypass circuit
2 1
System overview:

3062438_0309 11
With priority control, only one of the two cylinders can be heated
at any one time.
Initially, the cylinder with priority is heated, until its maximum cylinder
temperature has been reached or until the collector temperature
is inadequate for heating.
After heating the cylinder with priority, the system changes over to
heat the next cylinder in the sequence. If during the heating of the
lower ranking cylinder it is recognised that the cylinder with priority
can be heated again, the system changes back to that cylinder.
If, within 30 min. there is no changeover to the cylinder with priority,
the solar circuit pump is switched OFF, and the resulting collector
temperature is evaluated. If, with the pump idle, the collector
temperature increases far enough to enable the cylinder with
priority to be heated, the system reverts to that cylinder. If not, the
lower ranking cylinder will continue to be heated.
System conguration 4.0
Dual-circuit system with
two solar cylinders with
cylinder priority control
(for layout, see page 19)
With cylinder priority control, the cylinder with priority will be heated
rst. If during priority heating the temperature differential between
the collector and the cylinder with priority exceeds the selected
value for parallel cylinder operation, the lower ranking cylinder will
be heated in parallel to the cylinder with priority.
This utilises the excess energy that cannot be transferred to the
cylinder with priority to heat the lower ranking cylinder.
System conguration 3
Dual-circuit system with
two solar cylinders in parallel
operation
(for layout, see page 18)
System conguration 2
Single circuit system with
return temperature raising
for central heating backup
(for layout, see page 17)
The buffer cylinder will be heated if the temperature differential
between the collector and the buffer cylinder exceeds the start
temperature.
When the buffer cylinder temperature is adequate, the heating
return will be routed via the buffer cylinder, thereby raising the
return temperature.
You can use system conguration 2 also for transferring heat
between two cylinder, e.g. with connection set Solar CGS / CGW /
CGI (part no. 27 44 465).
System conguration 1
Single circuit system
(for layout, see page 16)
If the temperature differential between collector and solar cylinder
exceeds the selected start differential, the solar circuit pump will be
started, and the cylinder will be heated up to the selected maximum
cylinder temperature (temperature differential control).
System description

3062438_030912
System conguration 7
Dual-circuit system with
two collector arrays, two solar
cylinders with cylinder priority
control and two solar circuit
pumps
(for layout, see page 23)
Both cylinders are heated via priority control, as for system
conguration 4. Heating takes place via collector array 1 or 2,
depending on the prevailing temperature differential. If the collector
temperature of both collector arrays is adequate for cylinder heating,
both arrays will be used for heating, i.e. both solar circuit pumps
will start (as for system conguration 5).
System conguration 6
Dual-circuit system with
two collector arrays and
one solar circuit pump
(for layout, see page 22)
This functions like system conguration 5, i.e. heating is achieved
via collector array 1 or 2 via motorised valves that are opened
accordingly. When the cylinder is heated the solar circuit pump
is always switched as well.
Note: When installing motorised valves (el. V1 and el.V2)
ensure an adequate clearance between the collector
and the valve.
Otherwise the heat transfer can result in excessive
thermal stresses on the valves that may lead to their
failure.
System description
Subject to the temperature differential, the solar cylinder can be
heated via collector array 1 or 2. For this, solar circuit pump 1 or 2
are started. If the collector temperature of both collector arrays is
adequate for cylinder heating, both solar circuit pumps will start.
System conguration 5
Dual-circuit system with
two collector arrays and
two solar circuit pumps
(for layout, see page 21)
The solar module regulates the zone heating inside the
cylinders using temperature differential control. For this, the
cylinder temperatures are compared at two different points
(top and bottom) with the collector temperature. Subject to the
prevailing temperature, the solar circuit pump is either switched
ON or OFF, and the upper (priority operation) or lower section of
the cylinder is heated via the three-way diverter valve.
Initially, the upper section is heated, until its maximum
temperature has been reached or until the collector temperature
is inadequate for heating. After heating the upper section, the
system changes over to heat the lower section. If during the
heating of the lower section it is recognised that the upper
section can be heated again, the system changes back to heat
the upper section. If, within 30 min. there is no changeover
to the upper section, the solar circuit pump is switched OFF,
and the resulting collector temperature is evaluated. If, when
the pump is idle, the collector temperature rises far enough to
enable the upper section to be heated again, the SM2 module
changes over to heat the upper cylinder section. The lower
section continues to be heated if the collector temperature fails
to reach the required value.
System conguration 4.1
Function description for single
circuit systems with two
indirect solar coils inside the
cylinder
(for layout, see page 20)

3062438_0309 13
As with system conguration 9, here too the system will initially be
operated in bypass mode when the selected temperature differential
between collector and solar cylinder is exceeded. For this, the
temperature in the cylinder with priority is decisive.
When the temperature captured by the bypass sensor is adequate
for heating the cylinder with priority, the three-way diverter valve
changes over and that cylinder is then heated. The system changes
over to the next lower ranking cylinder and changes back to the
cylinder with priority as with system conguration 4.
Cylinder heating stops when the bypass temperature is inadequate
for heating one of the two cylinders, or the temperature differential
between the collector and cylinder falls by 5 K below the selected
value.
System conguration 10
Dual-circuit system with
two solar cylinders with
cylinder priority control and
bypass circuit
(for layout, see page 26)
The bypass circuit is used in systems with higher output losses
(e.g. because of longer lines). For this the system will initially be
operated in bypass mode when the selected temperature differential
between collector and solar cylinder is exceeded. Only when
the temperature captured by the bypass sensor is adequate for
heating the solar cylinder, the three-way diverter valve changes
over to cylinder heating.
Cylinder heating stops when the bypass temperature is inadequate
for heating or the temperature differential between the collector and
solar cylinder falls by 5 K below the selected value.
System conguration 9
Single circuit system with
bypass circuit
(for layout, see page 25)
This functions like system conguration 7, whereby heating is
achieved via collector array 1 or 2 via motorised valves that are
opened accordingly. When the cylinder is heated the solar circuit
pump is always switched as well.
Note: When installing motorised valves (V1 and V2) ensure
an adequate clearance between the collector and the
valve.
Otherwise the heat transfer can result in excessive
thermal stresses on the valves that may lead to their
failure.
System conguration 8
Dual-circuit system with
two collector arrays,
two solar cylinders with
cylinder priority control and
one solar circuit pump
(for layout, see page 24)
As with system conguration 9, here too the system will initially
be operated in bypass operation when the selected temperature
differential between collector and solar cylinder is exceeded. For
this, the temperature in the cylinder with priority is decisive.
When the temperature captured by the bypass sensor is adequate
for heating the cylinder with priority, the three-way diverter valve
changes over and that cylinder is then heated.
The lower ranking cylinder will be heated in parallel to the cylinder
with priority when the selected temperature differential for parallel
cylinder operation has been exceeded (as for system conguration 3).
With this system conguration the differential temperature between
bypass and cylinder with priority is decisive.
System conguration 11
Dual-circuit system with
two solar cylinders
in parallel cylinder mode
with bypass circuit
(for layout, see page 27)
System description

3062438_030914
Electrical connection
This is where the solar circuit pump (systems with solar circuit
pump) or solar circuit pump 1 (systems with two solar circuit
pumps) are connected.
Solar circuit pump SKP1
Output connection (230 V)
Output A1 is assigned differently, subject to the selected system
conguration:
Conguration 3, 5, 7: Solar circuit pump 2
Conguration 2, 4, 6, 8, 11: Motorised valve 1
Conguration 9, 10: Three-way diverter valve 1
The output is not assigned with conguration 1.
Output A1
Output A2 is assigned differently, subject to the selected system
conguration:
Conguration 6, 8, 11: Motorised valve 2
Conguration 7: Three-way diverter valve 1
Conguration 10: Three-way diverter valve 2
The output is not assigned with congurations 1, 2, 3, 4, 5, 9.
Output A2
Output A3 is assigned differently, subject to the selected system
conguration:
Conguration 2, 3, 4, 5, 6, 7, 9, 10: DHW circulation pump
(option)
Conguration 8,11: Three-way diverter valve 1
The output is not assigned with conguration 1.
Output A3
Various functions can be assigned to output A4.
a) to switch a de-stratication pump to circulate water inside a
cylinder as part of pasteurisation
b) as thermostat function: The output will be switched if the selected
cylinder temperature is exceeded. This output can be used, for
example, to enable cylinder reheating.
Output A4
This is where the cylinder sensor (systems with solar cylinder)
or cylinder sensor 1 (systems with two solar cylinders) are
connected.
Solar sensor cylinder SFS1
(NTC)
Input connection
This is where the collector sensor (systems with one collector
array) or collector sensor of collector array 1 (systems with two
collector arrays) are connected.
Solar sensor collector SFK1
(PT1000)
Input E1 is assigned differently, subject to the selected system
conguration:
Conguration 7, 8, 10, 11: Cylinder sensor cylinder 2 (NTC)
Conguration 2: Return sensor (required) (NTC)
Conguration 1, 3, 4, 5, 6: Return sensor (required if yield calculation
has been enabled) (NTC)
The input is not assigned with conguration 9.
Input E1

3062438_0309 15
For enabled yield calculation with actually measured ow rate
(possible with con gurations 1, 3, 4, 5, 6), the ow rate generator
is connected to input E2. This is part of the heat meter set
(accessories).
Input E2
Input E3 is assigned differently, subject to the selected system
con guration:
Con guration 3, 4: Cylinder sensor solar cylinder 2 (NTC)
Con guration 5, 6, 7, 8: Collector sensor collector array 2
(PT1000)
Con guration 2: Buffer sensor (NTC)
Con guration 9, 10, 11: Bypass sensor (NTC)
The input is not assigned with con guration 1.
Input E3
When using the solar module SM2 as part of a Wolf control system,
the individual components are linked together via eBUS.
eBUS
Electrical connection
Recommended cables/
leads and their minimum
cross-sections:
H005VV 3x1.0 mm² Power cable
H05VV 3x0.75mm² Solar circuit pump, three-way diverter
valve, motorised valve, DHW circulation
pump, de-strati cation/transfer pump
H05VV 2x0.5mm² BUS cable
H05VV 2x0.5mm² Sensor leads up to 15 m
H05VV 2x0.75mm² Sensor leads up to 50 m
During service work, isolate the entire system from the power
supply, otherwise there will be a risk of electrocution.

3062438_030916
Electrical connection
Collector
Solar cylinder
System conguration 1: Single circuit system
Solar circuit
pump SKP1
Mains
230 V
AC
Solar
sensor
DHW
cylinder
SFS1
Solar
sensor
collector
SFK1
Flow rate
generator
DFG
Return
sensor
RLF

3062438_0309 17
Electrical connection
System conguration 2: Single circuit system with return temperature raising for
central heating backup
Solar circuit
pump SKP1
DHW
circulation
pump ZKP
(option)
Mains
230 V
AC
Diverter valve
3WUV
Solar
sensor
DHW
cylinder
SFS1
Solar
sensor
collector
SFK1
Buffer
sensor
PF
Return
sensor
RLF
Collector
Solar cylinder
Heating
return
to the boiler
Return
heating
circuits

3062438_030918
Electrical connection
System conguration 3: Dual-circuit system with two solar cylinders in parallel
operation
Mains
230 V
AC
Solar circuit
pump SKP2
Solar circuit
pump SKP1
DHW
circulation
pump ZKP
(option)
Flow rate
generator
DFG
Solar
sensor
cylinder 1
SFS1
Solar
sensor
collector
SFK1
Return
sensor
RLF
Solar
sensor
cylinder 2
SFS2
Collector
Solar cylinder 1 Solar cylinder 2

3062438_0309 19
Electrical connection
System conguration 4.0: Dual-circuit system with two solar cylinders with cylinder
priority control
Mains
230 V
AC
Solar circuit
pump SKP1
DHW
circulation
pump ZKP
(option)
Flow rate
generator
DFG
Solar
sensor
collector
SFK1
Solar
sensor
cylinder 2
SFS2
Solar
sensor
cylinder 1
SFS1
Return
sensor
RLF
Diverter valve
3WUV
Solar cylinder 1 Solar cylinder 2
Collector

3062438_030920
System conguration 4.1: Single circuit system with two internal indirect solar coils
inside the cylinder
Electrical connection
Mains
230 V
AC
Solar circuit
pump SKP1
DHW
circulation
pump ZKP
(option)
Flow rate
generator
DFG
Solar
sensor
collector
SFK1
Solar
sensor
cylinder 2
SFS2
Solar
sensor
cylinder 1
SFS1
Return
sensor
RLF
Diverter valve
3WUV
Collector
DHW
cylinder
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