Page 1
Installation, Start-up and
Service Instructions
for use by heating contractor
Vitocontrol-S, WB2
Master control for
up to four gas-fired wall-mounted boilers
Vitodens 200, WB2-44 or -60
Please file in Service Binder
VITOCONTROL-S, WB2
IMPORTANT
Read and save these instructions
for future reference.
5285 781 v1.5 11/2007
Certified as a component part
of Viessmann boilers only
Page 2
Safety, installation and warranty requirements
Please ensure that this manual is read and understood before commencing installation. Failure to comply with the issues listed be-
low and details printed in this manual can cause product/property damage, severe personal injury, and/or loss of life. Ensure all
requirements below are understood and fulfilled (including detailed information found in manual subsections).
H Licensed professional heating
contractor
The installation, adjustment, service,
and maintenance of this equipment
must be performed by a licensed professional heating contractor.
"
Please see section
entitled “Important
Regulatory and
Installation Requirements”.
H Product documentation
Read all applicable documentation before commencing installation. Store
documentation near boiler in a readily
accessible location for reference in the
future by service personnel.
H Advice to owner
Once the installation work is complete,
the heating contractor must familiarize
the system operator/ultimate owner
with all equipment, as well as safety
precautions/requirements, shut-down
procedure, and the need for profession al service annually before the heating
season begins.
H Warranty
Information contained in this and related p roduct documentation must be
read and followed. Failure to do so ren-
ders warranty null and void.
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5285 781 v1.5
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General Information
Index
Content Page
General Information 3
Terminology 3................................................................................................................................................................................................................
Safety 4...............................................................................................................................................................................................................................
Important regulatory and installation requirements 4............................................................................................................................
About these instructions 4.......................................................................................................................................................................................
Installation 5......................................................................................................................................................................................................................
Control panel connections 5....................................................................................................................................................................................
Outdoor temperature sensor 7...............................................................................................................................................................................
Common supply temperature sensor (strap-on sensor) 7....................................................................................................................
Installation Example 9..................................................................................................................................................................................................
Multiple Vitodens 200 Installation 9..................................................................................................................................................................
Plug-in connections 10..................................................................................................................................................................................................
Troubleshooting 11..........................................................................................................................................................................................................
General faults 11..............................................................................................................................................................................................................
Faults on display panel 12..........................................................................................................................................................................................
Faults displayed in the “Faults” menu 12.........................................................................................................................................................
Technical Specifications 13........................................................................................................................................................................................
Sensor resistance chart 13........................................................................................................................................................................................
Technical data 13..............................................................................................................................................................................................................
.................................................................................................................................................................................................
Internal Wiring Diagram 14.........................................................................................................................................................................................
Terminology
The terminology used by the Cascade Control of the Vitocontrol-S may not always coincide with the terms
used in the North American market.
The following is a cross-reference chart between the terms used by the control and corresponding, more
commonly used, terms of the North American heating industry.
Term used by control
Flow Supply
Frost protection Freeze-up protection
Outside temperature Outdoor temperature
Desired Setpoint temperature
Time clock Timer
North American term
5285 781 v1.5
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Safety
Important regulatory and installation requirements
Power supply
Install power supply in accordance with
the regulations of the authorities having jurisdiction or, in the absence of
such requirements, in accordance with
National Codes.
External “potential-free” contacts to
the Cascade Control
Ensure that all contacts have sufficient
insulation clearance to live parts and
are certified for these applications.
Working with an open control
No static discharge to the internal componentry must ever occur when working with opened control equipment.
About these instructions
Take note of all symbols and notations intended to draw attention to potential hazards or important product information.
These include ”WARNING”, ”CAUTION”, and ”IMPORTANT”. See below.
Warnings draw your attention to the
WARNING
Indicates an imminently hazardous
situation which, if not avoided, could
result in death, serious injury or
substantial product/property damage.
CAUTION
Indicates an imminently hazardous
situation which, if not avoided, may
result in minor injury or
product/property damage.
presence of potential hazards or important product information.
Cautions draw your attention to the
presence of potential hazards or important product information.
IMPORTANT
Helpful hints for installation, operation or maintenance which pertain to
the product.
This symbol indicates that additional,
pertinent information is to be found in
column three.
This symbol indicates that other instructions must be referenced.
4
5285 781 v1.55285 781 v1.55285 781 v1.5
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Installation
Control panel connections
The Vitocontrol-S, WB2 control panel houses a Viessmann Cascade Control for use with up to four Vitodens
200, WB2-44 or WB2-60 wall-mounted condensing boilers.
Power supply
The panel is powered by 120 VAC, 60 Hz from the wall receptacle.
Fuses
Once the power switch is turned to ON, voltage is supplied to fuses F1 and F2.
Fuse F1 (0.063 A slow blow) protects the transformer.
Fuse F2 (6.3 A slow blow) protects the pump output.
IMPORTANT
Fuses F1 and F2 are time delay type and
should not be replaced with any other type.
Pump connection
Provisions have been made for one system supply pump to terminate inside the control panel.
This output is rated to a maximum current of 6.3 FLA. A single 6.3 A fuse protects this pump output against
over-current condition of the pump.
Cascade control
Within the control panel, the Cascade Control is powered by a 120 VAC/12 VAC transformer. The maximum
power consumption is 4 VA.
Relays R1 and R2
Along with the Cascade Control, two internal control relays are powered by the 12 VAC transformer. Relay R1
controls the operation of the system supply pump. Relay R2 provides a dry contact alarm output for a compiled
failure alarm.
5285 781 v1.55285 781 v1.5
5
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Control panel connections (continued)
The remaining sensor and communication connections are completed on the Cascade Control as follows:
HOutdoor temperature sensor
The outdoor temperature sensor is connected to terminals 1 and 2. See page 7 for installation details.
H
Common supply temperature sensor
The common supply temperature sensor is connected to terminals 3 and 4. The sensor is of a strap-on type.
See page 8 for installation details.
“Party” function
H
The control panel has provisions for an input dry contact switch to control the “Party” function of the cascade
control. Refer to the operating instructions regarding usage of this feature. This connection is made on terminals 5 and 6.
Operating Instructions and
User’s Information Manual
Cascade Control
HExternal heat demand
A dry contact external heat demand can also be connected to the panel. This demand may be from an external control for pool, spa, snow melt or domestic hot water.
Refer to the Operating Instructions for information regarding this feature. The contact connection is made on
terminals 5 and 7.
Operating Instructions and
User’s Information Manual
Cascade Control
HBoiler connections
The remaining connections are used for communication (KM-BUS) with the individual Vitodens 200 boilers.
HTerminals 9 and 10 on the Cascade Control are terminated in Vitodens number 1 on X5.3 and X5.4 plug
respectively.
HTerminals 11 and 12 on the Cascade Control are terminated in Vitodens number 2 on X5.3 and X5.4 plug
respectively.
HTerminals 13 and 14 on the Cascade Control are terminated in Vitodens number 3 on X5.3 and X5.4 plug
respectively.
HTerminals 15 and 16 on the Cascade Control are terminated in Vitodens number 4 on X5.3 and X5.4 plug
respectively.
Mounting requirements
The panel shall be securely mounted to a wall or support system.
Follow applicable local codes and/or requirements.
Do not mount panel under taps or in areas where the panel is at risk of water damage.
6
5285 781 v1.5
Page 7
Outdoor temperature sensor
Mount outdoor temperature sensor
on the north or northwest outside
wall of the building. If the boiler is
intended to supply heat to the
south side of the building only (split
piping system), mount the sensor
on the south side.
Mount the sensor so that water
cannot infiltrate the sensor
housing.
Install sensor where it will not be
affected by heat sources such as
windows or ventilation openings.
The sensor should be installed far
enough above ground to prevent
accidental damage or tampering.
The outdoor sensor must not be
covered with mortar, stucco, paint
or any form of coating or siding. If
the outside wall is finished after the
sensor is installed, the sensor
should be removed and placed on
the finished wall.
1.Slide protective cover from sensor body.
2.Loosen the two slot-head screws
from main body and remove sensor cover.
3.Fasten sensor body to wall with
single screw through middle of
body.
4.Remove cone-shaped strain relief
from sensor cover.
5.Cut wide end of cone to allow
wire/cable to be inserted into
sensor body. Size cone by
pushing wire/cable into wide end
of cone. Cut cone at the spot
where wire stops.
6.Remove wire/cable from cone
and reinsert into narrow end.
7.Push wire into body of sensor
and connect to screw terminals.
To make the electrical connection,
use a 2-wire cable with a maximum
lengthof115ft./35mandwitha
minimum wire size of AWG 16
copper.
8.Secure wire in place with
supplied strain relief.
Re-attach sensor cover, tighten
screws and slide protective cover
into place.
WARNING
When extending wire, there is the
possibility of exposure to
electromagnetic interference.
Avoid running wires beside or near
high voltage 120/240 VAC
conductors. If proximity to high
voltage conductors cannot be
avoided, use stranded, twisted pair
or shield design wire. Ensure that
only one end of the shielding is
grounded.
5285 781 v1.5
7
Page 8
Common supply temperature sensor
(strap-on sensor)
1.Place sensor as shown. Install on
low-loss header system supply
pipe (before flange) as close to
low-loss header as possible.
2.Hook tension spring to one side
of the sensor tab.
3.While holding sensor on pipe,
bring tension spring around pipe
and hook spring to second sensor tab. Ensure that sensor has
compressed into sensor housing.
4.The sensor is supplied with
approximately 6 ft./2 m of cable.
If required connect extension
wire (16 AWG) from sensor to
the panel of the Vitocontrol.
WARNING
When extending wire, there is the
possibility of exposure to
electromagnetic interference.
Avoid running wires beside or near
high voltage 120/240 VAC
conductors. If proximity to high
voltage conductors cannot be
avoided, use stranded, twisted pair
or shield design wire. Ensure that
only one end of the shielding is
grounded.
5.Connect wires to the Cascade
Control terminals 3 and 4 in the
Vitocontrol control panel to
complete installation of sensor.
8
5285 781 v1.5
Page 9
Installation Example
Multiple Vitodens 200, WB2-44 or -60 installation (up to four boilers) with one boiler dedicated to DHW
production and one heating circuit.
Outdoor temperature
Power supply
sensor
120 V, 60 Hz,
1PH
1
*
M
HK1
HK1M
200-H
IMPORTANT
The following installation example
depicts a possible piping layout for
multiple Vitodens 200 boilers
equipped with Viessmann System
System
pump
Technology. Please note that the
following examples are simplified
Viessmann 2-wire
BUS
conceptual drawings only!
Piping and necessary componentry
must be field verified.
A low water cut-off (LWCO) must
KM-BUS Boiler 1
KM-BUS Boiler 2
KM-BUS Boiler 3
Vitocontrol-S
120 V, 60 Hz, 1 PH
KM-BUS Boiler 4
20-A
Common supply
temperature sensor
Low-loss
header
be installed where required by local
codes.
Proper installation and functionality
in the field is the responsibility of
the heating contractor.
WARNING
If a DHW storage tank other than
20-A
120 V, 60 Hz, 1 PH
20-A
120 V, 60 Hz, 1 PH
a Viessmann Vitocell 100 or 300
tank is used, the installer must
verify proper operation of the
Viessmann DHW tank
temperature sensor with the
original manufacturer of the tank.
Viessmann strongly recommends
the installation of a temperature
tempering valve in the DHW
supply line.
Boiler 2 Boiler 3 Boiler 4
20-A
120 V, 60 Hz, 1 PH
2
*
Boiler 1
*1 Ensure that the correct communication board is installed in mixing valve control.
21
5285 781 v1.5
*
2
A DHW recirculation pump (#20) can
be connected to Boiler 1 only.
21
DHW tank
9
Page 10
Installation Example (continued)
Plug-in connections multiple Vitodens 200 (model WB2-44 or -60) with one boiler dedicated to DHW production
and one heating circuit
.
A Vitodens 200 plug-in
connections
A1
Vitodens 200 pump junction
box
B Power/Pump module
C Boiler pump
D DHW pump (one boiler only)
E Wall receptacle (main power
supply)
F Low water cut-off (if
applicable)
G Main disconnect switch
H DHW sensor (one boiler only)
I Vitocontrol-S, WB2
*1
J Power supply, 120 VAC, 7 A
K System pump
L Output: alarm, dry contact
M Outdoor temperature sensor
N Common supply temperature
sensor (strap-on)
O Input: dry contact, “Party”
switch
P Input: dry contact, heat
demand
R Vi-BUS connection
S KM-Bus
S
R
*1
See page 14 for internal wiring diagram
10
5285 781 v1.5
Page 11
Troubleshooting
General faults
Connected system components are not correctly controlled or not controlled at all
H Check connections and cables (see section entitled “Control panel connections” on page 5).
H Check the voltage at the terminals.
H Scan operating states in the ”Operating data” menu.
Operating Instructions and
User’s Information Manual
Cascade Control.
Room temperature too cold/too warm
H Check nominal values.
H Check actual room temperature.
H Check individual boiler control units of connected boilers.
Start-up/Service
Instructions
Vitodens 200, WB2-44/60.
System components operate erratically (e.g. severe temperature fluctuations)
H Check control unit settings in the “Nominal value” menu path.
Incorrect temperature recording
H Check temperature sensors concerned.
Operating Instructions and
User’s Information Manual
Cascade Control.
5285 781 v1.5
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Faults on the display
All LED displays are off, no text in the display
Check power supply and fuse (underneath large cover).
LED ”9” illuminates, no text in the display and/or keys do not function
Switch on power supply again and then check control unit settings.
Keys do not function or not always
Check location and seating of large cover.
LED ”9”flashes
The control unit has registered a fault. Scan the cause of the fault in the ”Faults” menu.
Operating Instructions and
User’s Information Manual
Cascade Control.
Faults displayed in the “Faults” menu
Flowtemp
System too slow
Outside temp
Frost prot. flow
Frost protection
room
Cause: Supply temperature sensor not/incorrectly connected or faulty.
Result: Functions based on the supply temperature are failing.
Remedy: Check connections and sensor using the resistance table (see page 13).
Cause: The supply temperature does not reach the nominal value less the set
temperature difference within the set period.
Result: The control unit stays in normal mode.
Remedy: Check system components. If necessary, match the set time and/or
temperature difference. Reset the fault by pressing
Cause: Outdoor temperature sensor not/incorrectly connected or faulty.
Result: The control unit changes over to average outdoor temperature.
Some functions based on the outdoor temperature are failing.
Remedy: Check connections and sensor using the resistance table (see page 13).
Cause: The supply temperature is too low to ensure freeze-up protection.
Result: The control unit creates a heat demand. The set supply temperature is
raised at least to the nominal value for freeze-up protection.
Remedy: Check system components.
Cause: The room temperature is too low to ensure freeze-up protection.
Result: The control unit creates a heat demand.
Remedy: Check system components.
twice.
Boiler 1
Fault code:
Comm. boiler 1
12
Cause: At least one boiler is in a fault state (multi-boiler control unit).
Result: Output possibly too low.
Remedy: Check boiler and boiler fault message.
Cause: Communication error
Remedy: Check KM-BUS connection.
5285 781 v1.5
Page 13
Technical Specifications
Sensor resistance chart
Temperature
[ºF / ºC]
5 / –15 36475 59 / 15 7885 113 / 45 2185 167 / 75 739
14 / –10 27665 68 / 20 6245 122 / 50 1 801 176 / 80 627
23 / –5 21166 77 / 25 5000 131 / 55 1493 185 / 85 535
32 / 0 16325 86 / 30 4028 140 / 60 1244 194 / 90 457
41 / 5 12695 95 / 35 3265 149 / 65 1041 203 / 95 393
50 / 10 9995 104 / 40 2663 158 / 70 876 212 / 100 339
Resistance
[Ω]
Temperature
[ºF / ºC]
Resistance
[Ω]
Temperature
[ºF / ºC]
Resistance
[Ω]
Temperature
[ºF / ºC]
Resistance
[Ω]
Technical data
Dimensions: 10½ × 11 × 2½ inches
265 × 280 × 60 mm
Weight
Panel weight: 6.25 lbs / 2.8 kg
Shipping weight: 7.2 lbs / 3.3 kg
Power supply: 120 VAC, 7 A, 60 Hz, 1 PH
Max. ambient temperature
H Storage and transport: –4 to+140 ºF
–20 to +60 ºC
H Operation: –4 to+104 ºF
–20 to +40 ºC
Relay outputs
Breaking capacity
H Pump relay: 120 VAC, 6.3 A max.
H Relay fault message: 120 VAC, 5 A max.
Terminal connection: 16-10 AWG
Sensor inputs
Outdoor temperature sensor/
supply temperature sensor: NTC sensors
Terminal connection: 16-10 AWG
Switch inputs
External heat demand,
“Party “ (override) switch: potential-free switching contacts
Terminal connection: 16-10 AWG
5285 781 v1.5
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Page 14
Internal Wiring Diagram
12VAC
TR
120VAC
F2 T6.3A
F1 T0.63A
I
LG N LG N
LG N
M
Power supply, 120 VAC,
7A,1PH
Supply pump, 120 VAC,
6.3 FLA
Dry contact, 120/24 V, 5 A
compiled failure alarm
Outdoor temperature sensor
Common supply temperature
sensor
Party switch (dry contact)
External heat demand
(dry contact)
KM-BUS
I
Viessmann-BUS
F1 Fuse 0.63 A/250 V, time
delay
F2 Fuse 6.3 A/250 V, time delay
14
5285 781 v1.5
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5285 781 v1.5
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Printed on environmentally friendly
(recycled and recyclable) paper.
Viessmann Manufacturing Company (U.S.) Inc.
45 Access Road
Warwick, Rhode Island • 02886 • USA
Tel. (401) 732-0667 • Fax (401) 732-0590
www.viessmann-us.com • info@viessmann-us.com
16
Viessmann Manufacturing Company Inc.
750 McMurray Road
Waterloo, Ontario • N2V 2G5 • Canada
Tel. (519) 885-6300 • Fax (519) 885-0887
www.viessmann.ca • info@viessmann.ca
Technical information subject to change without notice.
5285 781 v1.55285 781 v1.5
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