Viessmann SM1 Kurzanleitung
Installation and service
instructions
for contractors
VIESMANN
Solar control module
Type SM1
for wall mounting, part no. 7429 073
Solar control module
5724 071 GB 2/2010 Please keep safe.
2
Please follow these safety instructions closely to prevent accidents and mate-
rial losses.
Safety instructions explained
Danger
This symbol warns against the
risk of injury.
!Please note
This symbol warns against the
risk of material losses and envi-
ronmental pollution.
Note
Details identified by the word "Note" con-
tain additional information.
Target group
These instructions are exclusively
designed for qualified personnel.
■ Work on gas equipment must only be
carried out by a qualified gas fitter.
■ Work on electrical equipment must
only be carried out by a qualified elec-
trician.
■ The system must be commissioned by
the system installer or a qualified per-
son authorised by the installer.
Regulations
Observe the following when working on
this system
■ all legal instructions regarding the pre-
vention of accidents,
■ all legal instructions regarding envi-
ronmental protection,
■ the Code of Practice of relevant trade
associations,
■ all current safety regulations as
defined by DIN, EN, DVGW, TRGI,
TRF, VDE and all locally applicable
standards,
■ Gas Safety (Installation & Use) Regu-
lations
– the appropriate Building Regulation
either the Building regulations, the
Building Regulation (Scotland),
Building Regulations (Northern Ire-
land),
– the Water Fittings Regulation or
Water Bylaws in Scotland,
– the current I.E.E. Wiring Regula-
tions.
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in serious
injury.
■ Never smoke. Prevent naked
flames and sparks. Never
switch lights or electrical appli-
ances ON or OFF.
■ Close the gas shut-off valve.
■ Open windows and doors.
■ Remove all people from the
danger zone.
■ Notify your gas or electricity
supplier from outside the build-
ing.
■ Shut off the electricity supply to
the building from a safe place
(outside the building).
Safety instructions
Safety instructions
5724 071 GB
3
If you smell flue gas
Danger
Flue gas can lead to life-threat-
ening poisoning.
■ Shut down the heating system.
■ Ventilate the boiler room.
■ Close all doors leading to the
living space.
Working on the system
■ When using gas as fuel, also close the
main gas shut-off valve and safeguard
against unauthorised reopening.
■ Isolate the system from the power sup-
ply and check that it is no longer 'live',
e.g. by removing a separate fuse or by
means of a main isolator.
■ Safeguard the system against unau-
thorised reconnection.
!Please note
Electronic modules can be dam-
aged by electro-static dis-
charges.
Touch earthed objects, such as
heating or water pipes, to dis-
charge static loads.
Repair work
!Please note
Repairing components which ful-
fil a safety function can compro-
mise the safe operation of your
heating system.
Replace faulty components only
with original Viessmann spare
parts.
Ancillary components, spare and
wearing parts
!Please note
Spare and wearing parts which
have not been tested together
with the heating system can com-
promise its function. Installing
non-authorised components and
non-approved modifications/con-
version can compromise safety
and may invalidate our warranty.
For replacements, use only orig-
inal spare parts from Viessmann
or those which are approved by
Viessmann.
Safety instructions
Safety instructions (cont.)
5724 071 GB
4
Installation instructions
Installation sequence
Mounting on the wall............................................................................................ 5
Overview of electrical connections....................................................................... 6
System example 1................................................................................................ 7
System example 2................................................................................................ 12
System example 3................................................................................................ 18
System example 4................................................................................................ 24
System example 5................................................................................................ 30
System example 6................................................................................................ 36
Power supply........................................................................................................ 42
Service instructions
Function description.......................................................................................... 43
Specification
Specification......................................................................................................... 46
Connection and wiring diagram............................................................................ 47
Parts list................................................................................................................ 48
Declaration of Conformity................................................................................. 49
Keyword index.................................................................................................... 50
Index
Index
5724 071 GB
5
2.
1.
Installation sequence
Mounting on the wall
5724 071 GB
Installation
6
% &aVG
A
[{]
PWM
L?NL
?
N
sF fÖ
M
1~
/ aÖ
L?N
M
1~
sS
230 V~
ASolar control module
%Cylinder temperature sensor
&Collector temperature sensor
/Temperature sensor (if installed)
aÖ Temperature sensor (if installed)
sS Transfer pump or 3-way diverter
valve
sF Solar circuit pump
fÖ Power supply
aVG KM BUS to boiler control unit
PWM Speed control, solar circuit pump
(if circulation pump with PWM
control installed)
!Please note
Electronic modules can be dam-
aged by electrostatic charges.
Before beginning work, touch
earthed objects, such as heating
or water pipes, to discharge static
loads.
Note
Apply a strain relief to all on-site cables.
Close any unnecessary knock-outs with
cable grommets (not cut open).
Installation sequence
Overview of electrical connections
5724 071 GB
7
DHW heating with dual mode DHW cylinder
Function description
DHW heating with solar energy
If the temperature differential between
collector temperature sensor eQ and cyl-
inder temperature sensor qQ is greater
than the start temperature differential
(coding address 00), solar circuit pump
eE is started and DHW cylinder qP is
heated.
Solar circuit pump eE stops if:
■ Actual temperature drops below stop
temperature differential (coding
address 01)
■ Maximum cylinder temperature is
exceeded (coding address 08)
■ The temperature selected at high limit
safety cut-out qW (if installed) is
reached
Additional function for DHW heating
The requirements for the additional func-
tion are achieved through circulation
pump qT.
Suppression of DHW cylinder reheat-
ing by the boiler
Reheating suppression takes place in
two stages.
Reheating of DHW cylinder qP by boiler
1 is suppressed as soon as DHW cyl-
inder qP is heated by collectors eP. For
this, the set cylinder temperature for
reheating is reduced by boiler 1. After
solar circuit pump eE has been switched
off, suppression remains active for a cer-
tain time.
In the case of uninterrupted heating by
the collectors eP (> 2 h), boiler 1 will
only reheat if the set DHW temperature
selected at boiler control unit 2 (coding
address "67") is not achieved.
A third set DHW temperature can be
specified via coding address "67" (set-
ting range 10 to 95 °C). This value must
be below the first set DHW tempera-
ture.
DHW cylinder qP will only be heated by
boiler 1 if this set value cannot be ach-
ieved by the solar thermal system.
DHW heating without solar energy
The upper section of DHW cylinder qP is
heated by boiler 1. The cylinder ther-
mostat with cylinder temperature sen-
sor qZ of boiler control unit 2 regulates
cylinder heating.
Required codes at the oil/gas boiler control unit
Boiler installation and service
instructions
Installation sequence
System example 1
5724 071 GB
Installation
8
Function/system components Code in solar group
Adjust Delivered con-
dition
Start temperature differential for solar circuit pump at
connection sF (delivered condition 8 K)
00:... 00:8
Stop temperature differential for solar circuit pump at
connection sF (delivered condition 4 K)
01:... 01:4
Solar circuit pump type:
■ Solar circuit pump is not speed-controlled — 02:0
■ Solar circuit pump is speed-controlled with wave
pack control
02:1 02:0
■ Solar circuit pump is speed-controlled with PWM
control
02:2 02:0
Maximum cylinder temperature (delivered condition
60 °C)
08:... 08:60
Additional DHW heating function:
■ Without additional function for DHW heating — 20:0
■ With additional function for DHW heating 20:1 20:0
Note
Coding address 00 can be set to
min. 0.5 K above coding address 01.
Coding address 01 can be set to
max. 0.5 K below coding address 00.
Installation sequence
System example 1 (cont.)
5724 071 GB
9
Hydraulic installation scheme
qQ
qE
qZ
qP
qT
qR
qW
P
eP
eW
eQ
eE
1
2
M
eZ
KM BUS
230 V/50 Hz
%
sS
sF
&
&% sSsF
sF
ID: 4605132_1001_01
Installation sequence
System example 1 (cont.)
5724 071 GB
Installation
10
Equipment required
Pos. Description
1Wall mounted oil/gas boiler
with
2Boiler and heating circuit control unit
qP Dual mode DHW cylinder
qQ Cylinder temperature sensor % (solar control module)
qW High limit safety cut-out (accessory)
qE DHW circulation pump (on site)
(accessories may be required for connection)
qR Thermostatic mixing valve (accessory)
qT Circulation pump sS (transfer of heat, on site)
qZ Cylinder temperature sensor % (boiler)
eP Solar collectors
eQ Collector temperature sensor &
eW Solar-Divicon (accessory)
with
eE Solar circuit pump sF
eZ Solar control module, type SM1
eU Junction box (on site)
Installation sequence
System example 1 (cont.)
5724 071 GB
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2
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