Viessmann Vitodens 200 WB2 6-24C Instruction manual

Vitodens 200, WB2-24C/24/32 Vitodens 200, WB2-44/60
(with preinstalled vent pipe adaptor)
VITODENS 200
Gas-fired wall-mounted condensing boiler
25 to 230 MBH/7 to 67 kW
Vitodens 200
WB2 Series
Gas-Fired Wall-Mounted Condensing Boiler
with modulating MatriX-compact gas burner
for room air independent operation
(using a direct vent system)
For Natural Gas and Liquid Propane
Heating input NG 25 to 230 MBH
7to 67kW
Heating input LP 25 to 214 MBH
7to 63kW
Technical Data Manual
Model Nos. and pricing: see Price List
5167 472 v2.0 11/2002

Product Information
Product may not be exactly as illustrated.
2
VITODENS 200
The Vitodens 200 is a high-quality
condensing boiler made of stainless steel,
developed in accordance with the latest
achievements of the condensing boiler
technology industry. In terms of energy
usage, for example, the Vitodens 200 is
uncompromising: Thanks to the innovative
condensing technology of the boiler with
modulating MatriX-compact gas burner and
the especially developed Inox-Radial heat
exchanger surface, made of stainless steel,
the Vitodens 200 reaches an A.F.U.E. of up
to 94.2%.
The benefits at a glance:
HGas-fired condensing boiler
Standard heating boiler: 25 to 230 MBH/
7to 67kW
Combi heating boiler with
DHW production: 25 to 91 MBH/
7to 27kW
HA.F.U.E.: up to 94.2%
HThe modulating MatriX-compact gas burner
offers extremely low emissions. With
NOx: 8.9 ppm (air-free), CO: 5.5 ppm
(air-free), the Vitodens 200 meets the
specifications of the German “Blue Angel”
environmental certificate, Swiss clean air
regulations, California regulations, as well
as the most stringent requirements
worldwide of the Hamburg climatic
protection program “Heating + Solar”.
HInox-Radial heat exchanger surfaces made
of stainless steel – for increased
operational reliability, a long service life
and high heating output with minimum
space requirements.
Inox-Radial heat exchanger constructed in
compliance with CSA B51 and ASME.
HLow electrical power consumption due to
variable speed DC blower and variable
speed heating circuit pump (variable speed
pump available on some models only).
HThe Combi heating boiler with integrated
stainless steel plate heat exchanger
(integrated DHW Quick-System) and
comfort control produces domestic hot
water instantly, efficiently, and at even
temperatures.
HComfortrol control unit for
weather-responsive operation with
integrated diagnostic system and new
control functions.
HEasy to install, maintain and service
thanks to the uniform platform strategy
based on the building block principle with
plug-in connection system.
HSelf-calibrating flue gas adaptation: no
adjustments are necessary due to
automatic adaptation to the flue gas
pressure drop under varying operating
conditions.
Vitodens 200 –
Models WB2 11-44 and 15-60
172 MBH to 230 MBH/50 kW to 67 kW
5167 472 v2.0

Product Information
Cross-Section
Vitodens 200, WB2 6-24C
(25-91 MBH/7-27 kW) shown.
Product may not be exactly as illustrated.
3
Fully modulating MatriX-compact
gas burner – for extremely low
emission levels
Inox-Radial heat exchanger
surfaces made of stainless
steel – for increased
operational reliability,
a long service life and high
heating output with minimum
space requirements
Integrated, weather-responsive,
variable speed KM-BUS pump
Instantaneous DHW stainless
steel plate heat exchanger
(WB2 Combi Series)
Gas and water pipe
connections
Weather-responsive, digital
boiler control with
menu-driven Comfortrol
programming unit
5167 472 v2.0

Vitodens 200
4
Technical Data
Combi Series Standard heating boiler
Boiler Model Model No. WB2 6-24C WB2 6-24 WB2 8-32 WB2 11-44 WB2 15-60
Natural gas
CSA input
CSA output/DOE
heating capacity
MBH
kW
MBH
kW
25-91
7-27
22-81
6-24
25-91
7-27
22-81
6-24
37-124
11-36
33-112
10-32
55-172
16-50
49-153
14-44
80-230
23-67
71-205
21-60
Net I=B=R rating*1 MBH 70 70 97 133 178
Propane gas
CSA input
CSA output/DOE
heating capacity
MBH
kW
MBH
kW
25-81
7-24
22-73
6-21
25-81
7-24
22-73
6-21
37-112
11-33
33-101
10-30
55-155
16-45
49-138
14-40
80-214
23-63
71-191
21-56
Net I=B=R rating*1 MBH 63 63 88 120 166
Heat exchanger surface area ft.2
m2
8.22
0.76
8.22
0.76
9.91
0.92
20.91
1.94
20.91
1.94
Min. gas supply pressure
Natural gas
Propane gas
“w.c.
“w.c.
4
11
4
11
4
11
4
11
7
11
Max. gas supply pressure*2
Natural gas
Propane gas
“w.c.
“w.c.
14
14
14
14
14
14
14
14
14
14
A.F.U.E. %94.2 94.2 94.1 94.0 94.0
Max. power consumption (incl.
integrated pump for WB2 6-24
and 8-32)
W120 120 120 85 85
Weight lbs
kg
159
72
143
65
165
75
198
90
198
90
Boiler water content USG
ltr
1.1
4.0
1.1
4.0
1.2
4.6
3.1
11.7
3.1
11.7
Integrated pump flow rate
at 6.6 ft./2 m head pressure*3
GPM
ltr/h
4.6
1050
4.6
1050
4.6
1050
––
––
––
––
Boiler max. flow rate*4 GPM
ltr/h
6.2
1400
6.2
1400
7.0
1600
15.4
3500
15.4
3500
Max. operating pressure
at 210 ºF/99 ºC
psig
bar
45
3
45
3
45
3
45
3
45
3
Boiler water temperature
– Adjustable high limit (AHL)
range
space heating
DHW production
– Fixed high limit (FHL)
ºF/
ºC
ºF/
ºC
ºF/ºC
68 to 180/
20 to 82
108 to 183/
42 to 84
210/99
Boiler connections
Boiler heating supply and return NPTM “
Pressure relief valve NPTF “
Drain valve (male
thread)
Boiler supply/return for
indirect-fired DHW storage tank NPTM ”
¾
¾
¾
––
¾
¾
¾
¾
¾
¾
¾
¾
1¼
¾
1
1¼
1¼
¾
1
1¼
*1Net I=B=R rating based on piping and pick-up allowance of 1.15.
*2If the gas supply pressure exceeds the maximum gas supply pressure value, a separate gas pressure regulator must be installed upstream of the
heating system.
*3With pump rotational speed set to 100% flow capacity (2700 rpm), see Coding Address 045 in the Vitodens 200 Start-up/Service Instructions.
Pump factory default setting is 65% flow capacity (2000 rpm).
*4See “Typical System Flow Rates” on page 8 in this manual.
5167 472 v2.0

Vitodens 200
5
Combi Series Standard heating boiler
Boiler Model Model No. WB2 6-24C WB2 6-24 WB2 8-32 WB2 11-44 WB2 15-60
Dimensions
Overall depth
Overall width
Overall height
Height with flue gas elbow
(accessory)
inches
mm
inches
mm
inches
mm
inches
mm
16
406
19¾
500
35½
900
44
1116
16
406
19¾
500
35½
900
44
1116
16
406
19¾
500
35½
900
44
1116
21¼
540
23½
600
35½
900
47¼
1200
21¼
540
23½
600
35½
900
47¼
1200
Gas supply connection NPTF “ ½½ ½ ¾ ¾
Standby instantaneous DHW
plate heat exchanger
of Combi boiler*5
Water content DHW side
Inhalt heating water
side
USG/ltr
USG/ltr
0.26/1.00
0.18/0.70
––
––
––
––
––
––
––
––
Connections DHW and DCW NPTF “ ½ –– –– –– ––
Max. operating pressure
(DHW side)*6
DHW supply temp. range
Continuous draw rate
with a temperature increase
from 50 to 113 ºF/10 to 45 ºC
Draw rate range
psig/bar
ºF/ºC
GPH
ltr/h
GPM
ltr/min
150/10
100-135/38-57
156
590
0.8-2.1
3-8
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
Flue gas*7
Temperature (at boiler return
temperature of 86 ºF/30 ºC)
– at rated full load
– at rated partial load
Temperature (at boiler return
temperature of 140 ºF/60 ºC)
ºF/ºC
ºF/ºC
ºF/ºC
113/45
95/35
158/70
113/45
95/35
158/70
113/45
95/35
158/70
95/35
91/33
149/65
104/40
95/35
158/70
Average condensate
flow rate
with natural gas and
–T
S/TR=167/140ºF/75/60 ºC
–T
S/TR=104/86ºF/40/30 ºC
USG/day
ltr/day
USG/day
ltr/day
2-2.6
8-10
2.9-3.4
11-13
2-2.6
8-10
2.9-3.4
11-13
2.6-3
10-12
4-4.5
15-17
2.9-4
11-15
3.7-5
14-19
4.8-5.8
18-22
6-7.4
23-28
Condensate connection*8 hose
nozzle
Æin 1 1 1 1 1
Boiler flue gas connection*9 Æ
in/mm 3¼/80 3¼/80 3¼/80 4¼/110 4¼/110
Combustion air supply
connection*9
outer
Æin/mm 5/125 5/125 5/125 6/150 6/150
*5Minimum pressure for domestic cold water connection 1 bar/15 psig.
*6See DHW sizing chart on page 11 in this manual.
*7Measured flue gas temperature with a combustion air temperature of 68 °F/20 °C.
*8Requires 1”/25.4 mm tubing. See Vitodens 200 Installation Instructions for details.
*9For side wall vent installations:
Do not exceed max. equivalent length of 20 ft./6 m as stated in the Installation Instructions of the Vitodens 200 Direct Vent System.
Amaximum of five elbows may be installed in the vent system.
Do not attempt to common-vent Vitodens 200 with any other appliance.
Venting material to be supplied by Viessmann only; side wall vent installation must include Viessmann protective screen!
For more details refer to the venting section in this manual starting on page 17 and/or the Installation Instructions for the Vitodens 200
Direct Vent System.
"For information regarding other Viessmann System Technology componentry, please reference documentation of respective product.
5167 472 v2.0

Vitodens 200
78”/1975 mm (from floor level, recommended)
GC BR
DR/
DCW
15”/380 mm
BS
10”/250 mm
FFL
5”/125 mm
38”/965 mm
BD
37”/938 mm
16”/406 mm
(Depth)
(Height)
DS/
DHW
PRV AV
6¼”/158 mm
4¾“/120 mm
73/8“/187 mm
12¼”/314 mm
9¾”/250 mm
19¾”/500 mm (Width)
6
Vitodens 200 up to model WB2 8-32
Legend
AV Air Vent
BD Boiler Drain
BR Boiler Return
BS Boiler Supply
FFL Finished Floor Level
GC Gas Connection
PRV Pressure Relief Valve
Only for Combi heating boiler
DCW Domestic Cold Water ½”
DHW Domestic Hot Water ½”
Only for standard heating boiler
DR Boiler heating return for domestic hot
water production ¾”
DS Boiler heating supply for domestic hot
water production ¾”
5167 472 v2.0

Vitodens 200/Technical Data
GC BR
78”/1975 mm (from floor level, recommended)
3”/75 mm
540 mm (Depth)
DS
BS
DR
12”/300 mm
FFL
(
PRV
AV
2”/50 mm
BD
55”/1399 mm
8½”/215 mm
21¼”/
(Height)
73/8“/187 mm
11¾”/300 mm
16¼”/413 mm
20¾”/525 mm
23½”/600 mm (Width)
Ø6”/150 mm
7
Vitodens 200 model WB2 11-44 and up
Legend
AV Air Vent
BD Boiler Drain
BR Boiler Return
BS Boiler Supply
DR Boiler heating return for domestic
hot water production 1¼”
DS Boiler heating supply for domestic
hot water production 1¼”
FFL Finished Floor Level
GC Gas Connection
PRV Pressure Relief Valve
Recommended Minimum Service Clearances Minimum Clearances to Combustibles
Top Front Rear Left Right Concentric
vent pipe*1
00AL,CL 0 0 0 0
AL = Alcove
CL = Closet
*1Refer to the Installation Instructions of the Vitodens 200
Direct Vent System for details.
Diagram is not to scale.
5167 472 v2.0
Front
6”/150 mm
Top
12”/305 mm
0”/mm
28”/700 mm
Side
0”/mm
Back
Side

Technical Data
Pressure drop up to model WB2 8-32
Pressure drop model WB2 11-44 and up
0
1
2
3
4
5
6
7
8
0
3.3
6.6
9.8
13.1
16.4
19.7
23
26
Supply head pressure ft. m
02.2 4.4 6.6 8.8 11 13.2
Flow rate
15.41.1
0 500 1000 1500 2000 2500 3000 3500250 ltr/h
GPM
8
Waterside Flow (primary circuit)
The Vitodens 200 is designed only for closed loop, forced circulation
hot water heating systems.
Pressure drop (primary circuit) of Vitodens 200
Typical System Flow Rates
Model WB2 6-24C* 6-24 8-32 11-44 15-60
∆tforNG
Output (NG) Btu/h 81 000 81 000 112 000 153 000 205 000
20 ºF rise (GPM) 8.1 8.1 11.2 15.3 20.5
25 ºF rise (GPM) 6.5 6.5 9.0 12.2 16.4
30 ºF rise (GPM) 5.4 5.4 7.5 10.2 13.7
35 ºF rise (GPM) 4.6 4.6 6.4 8.7 11.7
40 ºF rise (GPM) 4.1 4.1 5.6 7.6 10.2
∆tforLP
Output (LG) Btu/h 73 000 73 000 101 000 138 000 191 000
20 ºF rise (GPM) 7.3 7.3 10.1 13.8 19.1
25 ºF rise (GPM) 5.8 5.8 8.1 11.0 15.3
30 ºF rise (GPM) 4.9 4.9 6.7 9.2 12.7
35 ºF rise (GPM) 4.2 4.2 5.8 7.9 10.9
40 ºF rise (GPM) 3.7 3.7 5.1 6.9 9.6
Use standard friction loss method for pipe sizing.
Observe boiler maximum flow rate limitations. If system flow rate exceeds
boiler maximum flow rate (as stated on page 4) or if system flow rate is unknown, Viessmann strongly
recommends the installation of a low-loss header. See page 29 for low-loss header information.
5167 472 v2.0
A low-loss header must be used when the system flow
rate exceeds the maximum flow rate of the Vitodens 200
boiler (as stated on page 4). Once the low-loss header
is connected, the built-in low-loss header logic of the
Vitodens 200 boiler ensures the required ∆t across the
system through the sensory communication between the
low-loss header and the boiler.
*Please note that the low-loss header cannot be used
with the Vitodens 200, WB2 6-24C Combi boiler.

Heating Circuit Pumps
With pump rotational speed set to 100% flow capacity (2700 rpm);
see Coding Address 045 in the Vitodens 200
Start-up/Service Instructions.
Pump factory default setting is 65% flow capacity (2000 rpm).
6
5
4
3
2
1
0
19.7
16.4
13.1
9.8
6.6
3.3
0 m ft. Head pressure
0.88 1.32 1.76 2.2 2.64 3.08 3.52 3.96 4.4 4.84 5.28 5.72 6.16 6.6 7.04
Flow rate
200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 ltr/h
GPM
9
Heating Circuit Pumps
Built-in variable speed heating circuit pump
for Vitodens 200 up to model WB2 8-32
Pump rotational speed is transmitted via an
internal data BUS to the pump and adjusted
by the control unit based on the outdoor
temperature and the activation periods for
normal and reduced heating.
In the factory default setting, the maximum
pump rotational speed is preset to
2000 rpm (coding address ”045”) and the
minimum pump speed to 1100 rpm (coding
address ”044”).
Pump Model Grundfos VIUPE-60 BUS
Rated voltage
Rated current
Condensor
Power
consumption
VAC
Amax.
Amin.
μF
Wmax.
Wmin.
230
0.45
0.21
2.5
100
50
Vitodens 200 up to model WB2 8-32 (residual head pressure of built-in variable speed pump)
Field supplied system heating circuit pumps
for Vitodens 200 (all models)
Viessmann offers a variety of prewired
Grundfos system heating circuit pumps (see
“Heating circuit pump (field supplied)” in the
Installation Examples on pages 34 to 42)
which meet typical Vitodens system
installation requirements.
See Price List for order information.
5167 472 v2.0

Heating Circuit Pumps/DHW Production
Pump selection must be based on accurate
system flow and pressure drop calculations
(incl. DHW sizing). Viessmann offers a variety
of prewired Grundfos circulating pumps which
meet typical Vitodens system installation
requirements.
See Price List for order information.
The following prewired standard Grundfos
pumps are available for operation with the
Vitodens 200, WB2-44/60 boilers:
HModel UP 26-99 F
HModel UP 43-75 F
HModel UP 26-96 F
HModel UP 26-64 F
Please reference corresponding
performance curves (1-4) in the chart to
the left.
IMPORTANT
Performance chart courtesy of Grundfos.
10
Heating Circuit Pumps (continued)
Recommended pumps for operation with Vitodens 200 model WB2 11-44 and up
(heating circuit pump, boiler pump and DHW pump field supplied)
DHW Production Planning
With integrated stainless steel plate heat
exchanger for instantaneous DHW heating
(model WB2 6-24C only) or with DHW
connections for DHW production via a
stand-alone DHW storage tank, the Vitodens
200 boiler series offers the right solution for
every need.
Various factors must be taken into account
when designing the DHW system, and
when deciding between the Combi heating
boiler with integrated DHW production and
the standard heating boiler with DHW
production via a stand-alone DHW storage
tank.
Such factors are:
HDHW requirement, level of comfort and
convenience
HNumber of draw points
HDistance of draw points from the
boiler/DHW storage tank
HSystem retrofit
HSpace requirements
Options
Gas-fired Combi
boiler with
instantaneous DHW
production
Gas-fired standard
heating boiler with
stand-alone DHW
storage tank
DHW requirement, level of DHW requirement for an apartment + +
q
,
comfort and convenience DHW requirement for a single-family house 0 +
Central DHW requirement for a multi-family house – +
Decentralized DHW requirement for a multi-family house + +
Number of draw points One draw point + 0
p
Several draw points, non-simultaneous use + 0
Several draw points, simultaneous use – +
Distance of draw points from Up to 23 ft./7 m (without DHW recirculation line) + –
p
the boiler/DHW storage tank With DHW recirculation line – +
System retrofit DHW storage tank already installed – +
Replacement of existing Combi boiler + –
Space requirements Minimal space available (installation in alcove) + 0
Adequate space available (boiler room) + +
+ = recommended 0 = recommended in certain cases – = not recommended
5167 472 v2.0

DHW Production
35
40
45
50
55
60
65
6 7 8 9 10 11 12 13 14
Draw rate at tap (mixed water)
DHW output temperature 95
104
113
122
131
140
149
1.6 1.8 2.1 2.4 2.6 2.9 3.1 3.4 3.7
ºF ºC
ltr/min
GPM
11
Domestic Hot Water Production via
Instantaneous DHW Plate Heat Exchanger (Model WB2 6-24C)
The Vitodens 200 Combi boiler is equipped
with an electronically controlled
instantaneous DHW plate heat exchanger.
The comfort control function ensures that
the instantaneous DHW plate heat
exchanger is kept consistently at the
required temperature.
This translates into immediate availability of
domestic hot water at any required
temperature level.
Technical Data DHW Plate Heat Exchanger
See page 5 in this manual for technical data.
The diagram on the left illustrates how the
DHW output temperature changes in relation
to the draw rate at the tap.
The DHW draw rate is restricted by means of
a flow limiter to 2.1 GPM/8 ltrs per min. Dat
a temperature of 128 ºF/53 ºC.
If more water is required, domestic cold water
is added, resulting in a lower DHW output
temperature.
In the example to the left, demonstrating the
change in DHW output temperature based on
the addition of domestic cold water, a
domestic cold water input temperature of
50 °F/10°C is assumed.
DHW output temperature at the Vitodens 200 boiler
DHW/DCW mixing zone
DHW output temperature at the mixing valve
Restriction by flow limiter
5167 472 v2.0

DHW Production
12
Domestic Hot Water Production via DHW Storage Tank
Vitodens 200 boilers can be used in
conjunction with the stand-alone DHW
storage tanks offered by Viessmann.
All Viessmann DHW storage tanks sold in
North America are available in “Vitosilver”
finish only.
Size and select the DHW storage tank based
on the forecasted DHW consumption of the
building in question.
For further technical information on DHW
storage tanks, see the Vitocell-V Technical
Data Manuals.
DHW Storage Tank Connection DHW Storage Tank Connection
for Vitodens models up to WB2 8-32 for Vitodens model WB2 11-44 and up
With installation fittings and built-in circulating pump With installation fittings and external circulating pump
for DHW production (via 3-way solenoid valve). for DHW production (optional equipment).
For the connection of the stand-alone DHW tank For the connection of the stand-alone DHW tank
a DHW Production Kit is required. a DHW Production Kit is required.
See Viessmann Price List for order information. See Viessmann Price List for order information.
Legend
DR Boiler heating return for domestic
hot water production
DS Boiler heating supply for domestic
hot water production
HR Heating Return
HS Heating Supply
An adequately sized precharged expansion
tank must be used. See Installation
Examples for details.
5167 472 v2.0
DS
DR
HS
HR
DR
HR
HS
DS
IMPORTANT

DHW Recirculation
13
DHW Recirculation
DHW recirculation lines increase the level of
comfort and convenience of the domestic
hot water supply and reduce water
consumption.
These advantages directly derive from the
immediate availability of domestic hot water
at all draw points.
Poor insulation of the DHW recirculation
line, however, can result in considerable
heat loss.
Viessmann therefore recommends that
effective insulation be provided and used for
DHW recirculation lines of 23 ft./7 m in
length or longer.
In addition to a recirculation pump and a
flow check valve, the DHW recirculation line
should incorporate a programmed timer to
switch off the recirculation pump overnight.
Legend
DCW Domestic Cold Water
DHW Domestic Hot Water
TPV Temperature and Pressure Relief
Valve
R DHW Recirculation Line
RP DHW Recirculation Pump
DHW Recirculation with Gas-Fired Combi Series
Due to the low water content of the plate
heat exchanger, it is not advisable to
connect a DHW recirculation line to the
Vitodens Combi boiler.
5167 472 v2.0
Vitocell-V stand-alone DHW storage tank
DCW
DCW
DHW
RRP

Wall Mounting
14
Wall Mounting Information (up to model WB2 8-32)
Required accessories for installation without
DHW storage tank
Mounting bracket
c/w mounting bolts and fittings
Additional requirements when connecting a
DHW storage tank
DHW Production Kit for DHW storage tank
connection
Illustration: Wall-mounting and connection of the Vitodens 200 Combi boiler (model WB2 6-24C)
Legend
BD Boiler Drain ¾”
BR Boiler Return ¾”
BS Boiler Supply ¾”
FFL Finished Floor Level
GC Gas Connection ½”
(gas shutoff valve is field supplied)
Only for Combi heating boiler
DCW Domestic Cold Water ½”
DHW Domestic Hot Water ½”
Only for standard heating boiler
DR Boiler heating return for domestic hot
water production ¾”
DS Boiler heating supply for domestic hot
water production ¾”
Mounting bracket
Vitodens 200 installation location
5167 472 v2.0
FFL
BD
BR
DR/DCW
GC
DS/DHW
BS
78”/1975 mm

Wall Mounting
15
Wall Mounting Information (model WB2 11-44 and up)
The Vitodens 200 (model WB2 11-44 and
up) comes with a template, which allows
you to easily mark the location of the screws
for the mounting bracket and the location of
the flue gas pipe on the wall.
The connection to the heating circuits
(installation fittings are supplied in the
Installation Fittings package supplied with
the boiler) must be made on site.
Illustration: Wall-mounting and connection of the Vitodens 200 standard heating boiler
Reference point top edge Vitodens 200
Mounting bracket
Vitodens 200 mounting template
*1Recommendation
Dimensions
a 23½”/600 mm
b 3¼”/82 mm
c 16”/407 mm
d¾”/18mm
e 29”/740 mm
f 78”/1975 mm
5167 472 v2.0
A
B
C
FFL
a
b
c
d
e
f*1

Condensate Connection/Neutralization Unit
16
Condensate Connection
Install the condensate drain pipe with a
suitable gradient.
Discharge condensate from the boiler into
the drainage system, either directly or (if
required) via a neutralization unit
(accessory).
Pipe ventilation must take place between
the siphon trap and the neutralization unit (if
applicable).
Condensate Connection for Vitodens 200
Hup to model WB2 8-32 Hmodel WB2 11-44 and up
Condensate Drainage and Condensate Neutralization
The condensate formed both in the
condensing boiler and in the flue gas pipe
must be discharged into the public sewage
system in accordance with all applicable
local regulations.
The condensate produced by a gas-fired
heating system has a pH value between 3
and 4.
Some local codes may require the use of a
separate neutralization unit to treat the
aggressive and corrosive nature of the
condensate.
With a neutralization unit installed, all
condensate from the boiler and the flue gas
pipe enters into the neutralization unit
where it is treated and released into the
public sewage system with a safe pH value
of above 6.5.
The use of neutralization granulate
(performing the neutralizing process) is
dependent on the operation of the heating
system. To determine the required refill
amount, check granulate level several times
during the first year of operation. In some
cases one granulate fill may last an entire
year.
Contact Viessmann to order a neutralization
unit for the Vitodens 200 boiler.
See Viessmann Price List for order
information.
The condensate discharge outlet to the
drainage system connection must be clearly
visible. It must be installed with a suitable
gradient and provided with a stench trap.
If the condensate outlet of the Vitodens
200 boiler is lower than the drain, a
condensate pump must be used.
Only corrosion-resistant materials must be
used for condensate drainage purposes (e.g.
braided hose). Do not use galvanized
materials or materials containing copper for
piping, couplings etc.
The condensate drain must have a trap to
prevent flue gas leakage.
Please note that other requirements might
apply depending on local regulations and/or
project-specific details.
It is advisable to contact your local
waterworks office (authority responsible for
waste water regulations) well before
commencing with the installation of the
neutralization unit in order to establish
details of local regulations that apply.
The following table shows the concentration
of (effluent) substances (e.g. heavy metals)
contained in the waste water from the
Vitodens 200 condensing boiler.
Condensate
(effluent)
Values measured
in mg/ltr
(
e
f
f
l
u
e
n
t
)
substances Vitodens 200
Lead
Cadmium
Chromium
Copper
Nickel
Zinc
Tin
<0.01
< 0.005
<0.01
<0.01
<0.01
<0.05
<0.05
5167 472 v2.0
IMPORTANT

Venting Option
a
Standard side wall venting layout
Max. wall thickness
19.6”/500 mm
Combustion air intake
Flue gas outlet
a = total vent length
17
Side Wall Venting Option
Vent pipe adaptor
Elbow, 87° (1 per carton)
Straight pipe
3.3 ft./1 m long
Vent termination
(incl. wall flashings)
Important!
Total length of vent termination pipe is
29”/730 mm. If required, the vent
termination pipe may be shortened by
max. 12”/305 mm (min. vent
termination length is 17”/425 mm).
Protective screen
Warning!
Protective screen MUST be installed.
Mounting clip, white(useatleast2)
Brass adaptor (M8 x 5/16” - 18) and
Setofscrews(#8 x 3/8”)
(not shown; see Installation Instructions for
Vitodens 200 Direct Vent System for details.)
Combustion air intake
Flue gas outlet
aTotal vent length*1
*1 See following page.
5167 472 v2.05167 472 v2.0

Venting Option
18
Vent termination location requirements (for installations in Canada)
The vent must be installed observing local
regulations in addition to National Codes,
CAN/CSA-B149.1 or 2.
AventmustNOT terminate...
1. ....directly above a paved sidewalk or
paved driveway which is located
between two single-family dwellings and
serves both dwellings.
2. ....less than 7 ft./2.13 m above a paved
sidewalk or a paved driveway located on
public property.
3. ....within 6 ft./1.83 m of a mechanical air
supply inlet*1 to any building (dryer
vents, non-sealed combustion furnace
and hot water heater vents are
considered to be mechanical air inlets).
4. ....above a meter/regulator assembly
within 3 ft./0.9 m horizontally of the
vertical centerline of the regulator vent
outlet and to a maximum vertical
distance of 15 ft./4.5 m.
5. ....within 3 ft./0.9 m of any gas service
regulator vent outlet.
6. ....less than 1 ft./0.3 m above grade level
or anticipated snow level (consult local
building authorities or local weather
office). Locate the vent termination in
such a way that it cannot be blocked by
snow.
7. ....within the following distances of a
window or door which can be opened in
any building, any non-mechanical air
supply inlet to any building or the
combustion air inlet of any other
appliance:
H1 ft./0.3 m for inputs up to and
including 100 000 Btu/h/30 kW
(applicable only to boiler models
WB2-24C/24).
H3 ft./0.9 m for inputs exceeding
100 000 Btu/h/30 kW (applicable to
boiler models WB2-32 and up).
8. ....underneath a veranda, porch or deck,
unless
Hthe veranda, porch, or deck is fully
open on a minimum of two sides beneath
the floor, and
Hthe distance between the top of the
vent termination and the underside of the
veranda, porch, or deck is greater than
1 ft./0.3 m.
9. ....in areas where condensation may
cause problems, such as above planters,
patios, or adjacent to windows where
flue gases may cause fogging.
10. ....within 3 ft./0.9 m to the property
line (advisable, not mandatory; please
check with local building authorities and
municipal bylaws).
11. ....at a location where ice formation on
the ground can present a hazard.
12. ....so that the flue gases are directed
toward brickwork, siding, or other
construction, in such a manner that may
cause damage from heat or condensate
from the flue gases.
13. ....where discharging hot flue gases
may cause property damage or personal
injury.
14. ....within 3 ft./0.9 m from an inside
corner of outside walls.
*1Including heat recovery units.
Vent termination location requirements (for installations in the U.S.A.)
The vent must be installed observing local
regulations in addition to National Codes,
ANSI-Z223.1 or NFPA 54.
AventmustNOT terminate...
1. ....less than 7 ft./2.13 m above a paved
sidewalk or a paved driveway located on
public property.
2. ....within 4 ft./1.2 m horizontally from
service regulator vents, electric and gas
meters as well as relief equipment.
3. ....less than 3 ft./0.9 m above any forced
air inlet located within 10 ft./3 m.
4. ....less than 1 ft./0.3 m above grade level
or anticipated snow level (consult local
building authorities or local weather
office). Locate the vent termination in
such a way that it cannot be blocked by
snow.
5. ....within 1 ft./0.3 m of a window or
door which can be opened in any
building, any non-mechanical air supply
inlet to any building or the combustion
inlet of any other appliance.
6. ....in areas where condensation may
cause problems, such as above planters,
patios, or adjacent to windows where
flue gases may cause fogging.
7. ....within 3 ft./0.9 m to the property line
(advisable, not mandatory; please check
with local building authorities and
municipal bylaws).
8. ....at a location where ice formation on
the ground can present a hazard.
9. ....so that the flue gases are directed
toward brickwork, siding, or other
construction, in such a manner that may
cause damage from heat or condensate
from the flue gases.
10. ....where discharging hot flue gases
may cause property damage or personal
injury.
11. ....within 3 ft./0.9 m from an inside
corner of outside walls.
5167 472 v2.0

Venting Option
Equivalent vent length calculation
*1
19
Equivalent Vent Length
87º elbow
Vent pipe (3.3 ft./1 m)
Vent pipe (1.65 ft./0.5 m)
Vent termination
*1 First elbow not included in equivalent
vent calculation.
HThe maximum vent length on all
models is 20 ft./6 m.
HThe minimum vent length on all
models is 17”/425 mm (length of the vent
termination when cut to the minimum
permissible length).
HDo not exceed the maximum vent
length.
HDo not use more than five elbows
within one vent system.
HFirst 87º elbow on boiler is not
included in equivalent vent length
calculation.
Type of fitting Equivalent length
87º elbow/
87º inspection tee
1.65 ft./0.5 m
45º elbow 1 ft./0.3 m
Equivalent vent length calculation example
2 x 87º elbow 3.3 ft./1 m
.................................
2 x vent pipe (1 m) 6.6 ft./2 m........................
1 x vent pipe (0.5 m) 1.65 ft./0.5 m.............
1 x vent termination 2.4 ft./0.73 m...............
Total equivalent length 13.95 ft./4.23 m
First elbow not included in equivalent vent
calculation.
Always include vent termination length in
calculations.
5167 472 v2.0
IMPORTANT

Venting Option
20
Vertical Venting Option
Vent pipe adaptor
Vent inspection tee/
Elbow, 87° (1 per carton)
Sliding coupling
Straight pipe
3.3 ft./1 m or
1.65 ft./0.5 m
Elbow, 87° (1 per carton)
Elbow, 45° (2 per carton)
Vent termination
Important!
Never shorten vertical vent termination.
Mounting clip
Wall band (c/w vent termination)
Brass adaptor (c/w set of screws)
(not shown; see Installation Instructions for
Vitodens 200 Direct Vent System for details.)
Roof flashing and storm collar
(field supplied)
5167 472 v2.0
Standard vertical venting layout