Viessmann Vitodens 100, WB1B (CombiPLUS Version) Wall-Mounted Gas Boiler Manual

Technical Data Manual

Model Nos. and pricing: see Price List

Vitodens 100-W

WB1B Series

Wall-Mounted, gas-fired condensing boiler with optional on demand hot water Combi PLUS Kit

Heating input: 37 to 118 MBH

10.8 to 34.5 kW

VITODENS



100-W

Vitodens 100-W, WB1B

(with pre-installed coaxial vent pipe adaptor)

Gas-Fired Wall-Mounted Condensing Boiler with modulating stainless steel MatriX cylinder burner, stainless steel Inox-

Radial heat exchanger for room air independent operation

(using a direct vent system) or room air dependent operation.

Optional Combi PLUS Kit providing reliable on demand hot water without a DHW tank is available.

Combi PLUS Kit

H

5601 189 - 02 09/2015

2

General

Product Information

Vitodens 100-W, WB1B Technical Data

Equipped with a Viessmann stainless steel heat exchanger for lasting performance and reliability and a modulating

MatriX cylinder gas burner, the Vitodens 100-W wallmounted condensing boiler is the perfect combination of value, quality and Viessmann technology.

The benefits at a glance:

Outstanding efficiency of 94.0 % A.F.U.E. on all models.

Lasting performance with Viessmann-made SA240 316Ti stainless steel

Inox-Radial heat exchanger constructed to ASME

Section IV and CSA B51.

Low-emission with fully-modulating stainless steel MatriX cylinder burner. Factory calibration eliminates adjustments in

the

< 29 ppm NOx (at 3% O

< 40 ppm CO (at 3% O

2

)

2

)

Control variety

Integrated boiler control interfaces with any level of external control - from room thermostat to outdoor reset and more.

Compact, lightweight wall mount design and zero clearance to combustibles make it a great choice for limited-space installations.

Extremely quiet operation quieter than most refrigerators.

< 50 dBA [at 3.3 ft. (1 meter)]

Easy installation, service and maintenance with all pipe connections located at the bottom and serviceable components (including electrical connections) easily accessible from the front.

Multiple venting options

- Horizontal or vertical sealed combustion

coaxial, PP(s) vent system (Viessmann supplied).

- Horizontal, vertical or hybrid sealed combustion

double-pipe CPVC vent system (field supplied).

- Horizontal or vertical single pipe CPVC vent system

(field supplied).

- Horizontal or vertical single or double pipe PP(s),

flexible vent system (Viessmann supplied).

Suitable for high altitude levels

of up to 10,000 ft. (3,000 m) without deration.

Built-in automatic frost protection

allows boiler to be shut off for an extended period

of time while protecting it against freeze-up.

Reliable on demand hot water

with an optional CombiPLUS kit (no DHW tank required).

- Plate type heat exchanger

- Built-in diverting valve

- Built-in Grundfos 3-speed pump

- Built-in pressure bypass valve

- Built-in water hammer arrester

- Built-in flow sensor

- Built-in temperature sensor

- Supplied with a pressure relief valve rated at 150 psi

Note: Check the boiler rating plate on the Vitodens 100-W, models WB1B-26 or WB1B-35 to ensure it states compatibility with the CombiPLUS kit.

Limited lifetime warranty

in residential applications.

Certified to CSA Low Lead Content Certification Program;

including US Safe Drinking Water Act, NSF/ANSI 372

as well as other applicable US State requirements.


Product Information

General

Boiler cross-section

Legend

A Stainless steel MatriX cylinder burner

B Inox-Radial stainless steel heat exchanger

C Burner blower

D Gas and hydronic connections

E Boiler control

Standard Equipment:

Wall-mount boiler and installation fittings c/w 30 psi pressure relief valve, pressure gage, gas shut-off valve, two fill/drain valves, all mounting hardware, outdoor temperature sensor, and LP conversion kit.

J I F H G

Note: Products may not look exactly as illustrated.

CombiPLUS cross-section

Legend

F Plate-type heat exchanger

G Boiler / DHW pump

H Flow sensor

I Pressure by-pass valve

J Diverting valve

3

4

Technical Data

Specifications


Standard heating boiler

Natural gas and LPG

CSA input

CSA output/DOE 1 heating capacity

Net I=B=R rating 2

Heat exchanger surface area

Min. gas supply pressure

Natural gas

LPG

Max. gas supply pressure 3

Natural gas and LPG

A.F.U.E.

Weight

Shipping weight

Boiler water content

Boiler Model No.

“w.c.

“w.c.

“w.c.

% lbs kg lbs kg

USG

L

GPM

L/hr.

MBH kW

MBH kW

MBH ft.

2 m 2

Boiler max. flow rate 4

Max. operating pressure

(max. allowable working pressure) at 210º F (99º C)

Boiler water temperature

- Adjustable high limit (AHL) range

- space heating (steady state)

- DHW production (set-point) psig bar

ºF (ºC)

ºF (ºC)

WB1B 26

37-91

10.8-26.7

34-83

9.9-24.3

72

10.23

0.95

4

10

14

94.0

78

34.1

95

43

0.87

3.3

6.2

1400

45

3

86 to 176 (30 to 80)

176 (80)

210 (99) - Fixed high limit (FHL)

Boiler connections

Boiler heating supply and return

Pressure relief valve

Drain valve

Dimensions

Overall depth

Overall width

Overall height

ºF (ºC)

NPTM (male) “

NPTF (female) “

(male thread) “ inches mm inches mm inches mm c c c

“

“

“

14 d

360

15 c

400

28 b

725

1 Output based on 140º F (60º C), 120º F (49º C) system supply / return temperature.

2 Net I=B=R rating based on piping and pick-up allowance of 1.15.

3 If the gas supply pressure exceeds the maximum gas supply pressure value, a separate gas pressure regulator must be installed upstream of the heating system.

4 See “System Flow Rates” on pages 20 to 25 in this manual.

WB1B 35

37-118

10.8-34.6

34-108

9.9-31.6

94

10.23

0.95

4

10

14

94.0

78

34.1

95

43

0.87

3.3

6.2

1400

45

3 c “ c “ c “

14 d

360

15 c

400

28 b

725


Specifications

(continued)

Technical Data

Standard heating boiler (continued)

Gas supply connection

Flue gas 5

Temperature at boiler return temperature of

86º F (30º C)

- at rated full load

- at rated partial load

Temperature at boiler return temperature of 140º F (60º C)

Flue gas value

Mass flow rate (of flue gas)


NPTF

(female)”

ºF (ºC)

ºF (ºC)

ºF (ºC)

WB1B 26 c

127 (53)

90 (32)

167 (75)

WB1B 35 c

131 (55)

90 (32)

172 (78)

- at rated full load

- at rated partial load lbs/h kg/h lbs/h kg/h

79.2

36.0

33.0

15.0

100.1

45.5

33.0

15.0

Available draught Pa mbar

100

1.0

100

1.0

Flue gas temperature sensor limit

Average condensate flow rate 6 with natural gas

- T

S

/T

R

=122 / 86º F (50 / 30º C)

ºF (ºC) 230 (110) 230 (110)

Condensate connection 7

Boiler flue gas connection 8

Combustion air supply coaxial connection 8 single

Noise level (at 1 meter)

- at full load

- at partial load

High altitude (factory set) 9

USG/day

L/day hose nozzle

Ø in

Ø in (mm) outer Ø in (mm)

(dB)

(dB) ft. (m)

1.95-2.3

2 e

8-9

1

(60)

4 (100)

2 e (60)

47

40

0-5,000 (0-1,500)

5 Measured flue gas temperature with a combustion air temperature of 68° F (20° C).

6 Based on typical boiler cycles, including partial load conditions.

7 Requires 1”(25) mm tubing. See Vitodens 100-W Installation Instructions for details.

8 For detailed information refer to the Vitodens Venting System Installation Instructions.

9 For 5,000 to 10,000 ft. (1,500 to 3,048 m) operation, a control programming change is required.

Refer to the Installation and Service Instructions for details.

 For information regarding other Viessmann System Technology componentry, please reference documentation of respective product.

2.5-2.8

9.4-10.5

2 e

1

(60)

4 (100)

2 e (60)

49

42

0-5,000 (0-1,500)

5

6

Technical Data

Specifications

(continued)


CombiPLUS (Integrated with the Boiler)

DHW supply temperature

Continuous draw rate 1 with DCW temp. of 56º F (13º C)

Continuous draw rate 2 at  t= 63º F (35K)

Maximum allowable working pressure (potable water)

Test pressure

Connections, DHW and DCW

Connections to boiler supply/return and to heating supply/return

Dimensions

Overall depth

Overall width

Overall height

Height with pipe connector


ºF (ºC)

USG/h

L/h

USG/h

L/h psi psi

NPTM (male) “

NPTM (male) “ inches mm inches mm inches mm inches mm

Integrated pump flow rate

DHW production @ 23 ft. (9.8 m)

Head pressure USG/min.

L/h

Heating system operation with system side additional drop in pressure of max. 6 ft. of water (1.8 m)

Weight

USG/min.

L/h lbs kg

WB1B 26

140 (60)

99

374

156

589

150

300 b c

“

“

9.8

250

17

432

8.7

223

13

331

5.63

1278

6.2

1408

25

11

1 Based on boiler max. output and boiler supply temperature of 176º F (80º C).

2 DCW and DHW temperature rise would be proportional. Maximum DHW supply temperature is 140º F (60º C).

WB1B 35

140 (60)

147

556

216

800

150

300 b c

“

“

9.8

250

17

432

8.7

223

13

331

5.63

1278

6.2

1408

25

11


Boiler Dimensions Without Bottom Piping Connections

Dimensions

Front view Side view Top view

Connections Vitodens 100-W, WB1B 26, 35

Legend

Connections

A Condensate drain, plastic hose Ø 0.87” (22 mm)

B Boiler water supply, NPT ¾” (male thread)

C Gas connection, NPT ¾” (male thread)

D Boiler water return, NPT ¾” (male thread)

E Combustion air opening for double pipe system

F Combustion air opening for coaxial system

Note: If using the optional CombiPLUS see page 9.

Dimensions a See illustration for dimensions b 15¾” (400 mm) c 2 e 4 f

7 /

8

” (68 mm) d 28½” (725 mm)

” (123 mm) f 6 d ” (156 mm) g 14 d ” (360 mm) h 5” (125 mm) j 12” (305 mm) k 1 a ” (31 mm) m 7 7 /

8

” (200 mm) n 3 d ” (80 mm)

7

Dimensions

Boiler Dimensions With Piping Connections


Piping connections for Vitodens 100-W,

WB1B 26 and 35 (factory supplied)

8

Note: If using the optional CombiPLUS see page 9.

Legend

BWR Boiler water return, ¾”

BWS Boiler water supply, ¾”

BD

BF

Boiler drain

Boiler fill

GC Gas connection, ¾” NPTM (male thread)

PRV Pressure relief valve

PG Pressure gage

VC

CAI

Venting connection

Combustion air inlet connection (optional)


CombiPLUS Dimensions and Piping Connections

CombiPLUS Connections

Dimensions

Front view Side view

Top view

Legend

A Boiler water supply, NPTM ¾” (male thread)

B Boiler water return, NPTM ¾” (male thread)

C System water supply, NPTM ¾” (male thread)

D System water return, NPTM ¾” (male thread)

E DHW, NPTM ½” (male thread)

F DCW, NPTM ½” (male thread)

A with 7” flex pipes

B

C E F D

Front view

9

Dimensions

Boiler Minimum Clearances

Recommended minimum boiler service clearances

Side

Top

Front

Back

5

Side


Recommended minimum boiler and CombiPLUS Kit clearances to combustibles

Top Front Rear

0

Left

0

Right

0

Vent pipe *1

0 0 0 AL,

CL

AL = Alcove

CL = Closet

* 1 Refer to the Installation Instructions

of the Vitodens Venting System details.

Note: The Vitodens 100-W boiler has passed the zero inches vent clearance to combustibles testing requirements dictated by the boiler latest

Harmonized Standard ANSI Z21.13. CSA 4.9.2007 and therefore is listed for zero clearance to combustibles when vented with a single-wall special venting system (AL-29-4C material) or UL/ULC-listed

CPVC/PP(s) gas vent material. The zero inches vent clearance to combustibles for the Vitodens 100-W boiler supercedes the clearance to combustibles listing that appears on the special venting system

label.

CombiPLUS installation options

Min. distance between the boiler and CombiPLUS with

Viessmann supplied 7” flex piping connection fittings.

Shown is the maximum distance between the boiler and CombiPLUS using field supplied fittings and pipes.

10

Note: The maximum distance between the boiler and the CombiPLUS is restricted by the communication cable to 36” (915 mm).


Heating Circuit Pumps

Waterside Flow (boiler circuit)

The Vitodens 100-W is designed only for closed loop, forced circulation hot water heating systems.

Pressure drop (primary circuit) of Vitodens 100-W ft. m

Operation

Heating circuit pumps (field supplied)

Recommended heating pumps with Vitodens 100-W,

WB1B 26, 35 (without an optional CombiPLUS).



Grundfos 15-58 (3-speed)



Taco

or

00R equivalent

Refer to the graph for the proper waterside boiler friction loss calculations.

IMPORTANT

Pump selection must be based on accurate system flow and pressure drop calculations (including DHW sizing).

USGPM

L/h

Flow rate

A low-loss header must be used when the system flow rate exceeds the maximum (or minimum) flow rate of the Vitodens 100-W boiler. An alternative method may be used, such as primary secondary piping using closely spaced tees.

A low-loss header offers additional benefits not provided by a pair of closely spaced tees.

Viessmann strongly recommends and prefers the use of a low-loss header over closely spaced tees.

Please see page 18 for details.

Use standard friction loss method for pipe sizing.

Observe boiler maximum and minimum flow rate limitations.

If system flow rate exceeds boiler maximum flow rate

(as stated on page 18) or if system flow rate is unknown,

Viessmann strongly recommends the installation of a low-loss header. See page 18 for low-loss header information or refer to the Vitodens Venting System

Installation Instructions.

11

12

Operation


(continued)


CombiPLUS built-in pump

Grundfos UPS15-78 three speed heating circuit/DHW production pump for Vitodens 100 WB1B 26, 35 boilers

(in the factory setting, the pump speed is preset to ‘speed three’)

Speed Three

Speed Two

Speed One

Flow Q (gpm)

Performance chart courtesy of Grundfos

Pump Model Grundfos UPS15-78

Rated voltage

Rated current

VAC

A max.

A min.

Capacitor

Power consumption

 F

W max.

W min.

115

1.15

0.8

8

130

80

CombiPLUS built-in pump, Grundfos UPS15-78 residual head pressure

Residual head of built-in three speed pump used with Vitodens 100 WB1B 26, 35

Flow Q (gpm)



(continued)

Operation

DHW Production Planning

With the CombiPLUS for instantaneous DHW heating or with DHW connections for DHW production via a stand-alone DHW storage tank, the Vitodens 100 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 DHW production with integrated CombiPLUS and the standard heating boiler with DHW production via a standalone DHW storage tank.

Such factors are:



DHW requirement, level of comfort and convenience



Number of draw points



Distance of draw points from the boiler/DHW storage tank

 retrofit

 requirements

Options

DHW requirement, level of comfort and convenience

Space requirements

DHW requirement for an apartment

DHW requirement for a single-family house

Central DHW requirement for a multi-family house

Decentralized DHW requirement for a multi-family house

Number of draw points One draw point

Several draw points, non-simultaneous use

Several draw points, simultaneous use

Distance of draw points from the boiler/

DHW storage tank

System retrofit

Up to 23 ft. (7 m) (without DHW recirculation line)

With DHW recirculation line

DHW storage tank already installed

Replacement of existing Combi boiler

Minimal space available (installation in alcove)

Adequate space available (boiler room)

Gas-fired boiler with instantaneous

CombiPLUS production

+

0

-

+

+

+

-

+

-

Gas-fired standard heating boiler with stand-alone

DHW storage tank

+

+

+

+

0

0

+

-

+

-

+

+

+

+

-

0

+

+ (recommended)

0 (recommended in certain cases)

- (not recommended)

13

Operation


(continued)


Domestic Hot Water Production via Instantaneous DHW Plate Heat Exchanger ( CombiPLUS )

The CombiPLUS is equipped with an electronically controlled instantaneous DHW plate heat exchanger.

The comfort control function (if selected) ensures that the instantaneous DHW plate heat exchanger is kept warm.

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.

CombiPLUS heat exchanger performance

DHW supply temperature for WB1B 26 (with mixed water)

Legend

A DHW output temperature

B DHW/DCW mixing zone

C DHW output temperature at the tap

D Max. flow (restriction by flow limiter)

This chart illustrates the changes in the outlet temperature, subject to the flow rate at the tap.

If greater volume (max. flow rate through heat exchanger=

2.6 GPM) of water is required, cold water needs to be mixed which reduces the outlet temperature.

Curve is only applicable for a DCW inlet temperature of

56º F and a boiler input of 91,000 MBH (Vitodens 100-W,

WB1B 26).

Max. recovery rate @ DHW temperature of 140º F = 1.7 GPM

Min. flow through the heat exchanger for boiler start= 0.4 GPM

14

DHW flow rate (GPM)







WB1B 35).










WB1B 35).





Mounting

Installation

Domestic Hot Water Production via DHW Storage Tank

Vitodens 100-W boilers can be used in conjunction with the stand-alone DHW storage tanks offered by Viessmann

(a separate DHW controller should be field supplied).

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 forecast DHW consumption of the building in question.

For further technical information on DHW storage tanks, see the Vitocell-V Technical Data Manuals.

Mounting Vitodens 100-W boiler

Start-up and Maintenance

Wall Mounting Information

The Vitodens 100-W (model WB1B 26 and 35) 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 (Viessmann coaxial PPS vent system only).

The connection to the heating circuits must be made on site (installation fittings are supplied in the Installation

Fittings package supplied with the boiler).

Mounting Vitodens 100-W boiler and the CombiPLUS


Legend

A Boiler mounting template

Legend

A Boiler mounting template

B CombiPLUS mounting template

15

16

Installation

Condensate

Condensate Connection

Install the condensate drain pipe (Ø 7/8” / 22 mm) with a suitable gradient (min. 2.5%).

Discharge condensate from the boiler into the drainage system, either directly or (if required) via a neutralization unit (accessory).

Condensate connection for Vitodens 100-W



model WB1B 26, 35

A Discharge tubing

The condensate drain of the Vitodens 100-W boiler is equipped with a built-in siphon trap in order to keep flue gases from being discharged via the condensate drain.

IMPORTANT

Pipe ventilation must take place between the siphon trap and the neutralization unit (if applicable).


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 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 100-W 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 100-W boiler is lower than the drain, a condensate pump must be used.

Only corrosion-resistant materials may 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.

Please note that other requirements may 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 100-W condensing boiler.

Condensate

(effluent) substances

Lead

Cadmium

Chromium

Copper

Nickel

Zinc

Tin

Values measured in mg/L Vitodens 100

< 0.01

< 0.005

< 0.01

< 0.01

< 0.01

< 0.05

< 0.05


Venting Options / Electrical Connections

Vitodens 100-W Venting Options

For detailed information refer to the Vitodens Venting

System Installation Instructions.

Electrical Connection

All electrical connections are made to the boiler’s integrated power pump module (120 VAC/60 Hz).

Use disconnect means and power service switch as per local code requirements.



Installation

Control Unit

Function and construction:

The control is integrated into the Vitodens 100-W boiler.



Integrated diagnostic system



For room temperature-dependent operation, an external control or a room temperature thermostat may be connected



To control DHW temperature, a separate DHW controller may be connected



External heat demand



0-10 V (with open therm only)



Viessmann outdoor temperature sensor (field wiring)



Open Therm (field wiring)



CombiPLUS instantaneous DHW control

The control unit consists of:



Display



Selector dial for boiler water temperature adjustment



Selector dial for service setting



Temperature adjustable high limit



Boiler temperature sensor



Burner fault display



Burner fault reset

 gage



Fuse

Boiler temperature sensor

The boiler temperature sensor is connected to the control unit and built into the boiler.

Frost protection

Frost protection is continuously active. The burner is switched ON when the boiler water temperature reaches

41° F (5° C) and is switched OFF again when the boiler water temperature reaches at least 59° F (15° C)

[but not more than 68° F (20° C)].

For details on the control, refer to the

Vitodens 100-W Operating Instructions.

17

Installation

Accessories

Accessories for the Vitodens 100-W

Neutralization Unit for Single-Boiler Applications with neutralizing granulate for Vitodens 100-W, WB1B 26, 35

Part No. 7134 231


V primary

V bypass

V secondary

18

Low-Loss Header

80/60

[max. flow rate 19.5 GPM (4.4 m3/h)]

120/80

[max. flow rate 35.2 GPM (8 m3/h)]

A low-loss header offers additional benefits not provided by a pair of closely spaced tees. Viessmann strongly recommends and prefers the use of a low-loss header over closely spaced tees. When used in conjunction with the Vitodens 100-W boiler, the low-loss header acts as hydraulic break, decoupling boiler and system circuits from each other (no sensor required). It is recommended to use the low-loss header in applications in which the total system flow rate exceeds the maximum or falls below the minimum flow rate of the Vitodens 100-W boiler.

For maximum boiler flow rates, see the table on page 11 in this manual.

Viessmann strongly recommends the use of a low-loss header in cases where the system head and flow rates are unknown.

In addition, the low-loss header helps eliminate air and debris [D] from the heating system. See illustrations for

Low-loss header design and the principle of operation.

Product may not look exactly as illustrated.

Principal of operation

The low-loss header is available in the following sizes.

Select the size based on the maximum system flow rate of your application.

Model No.

Type 80/60

Type 120/80

Max. system flow rate

19.5 GPM (4.4 m3/h)

35.2 GPM (8 m3/h)

Legend

AB Air Bleed

BR Boiler Return

BS Boiler Supply

BY Bypass

(with laminar flow)

D Debris and/or air

T1 Boiler supply temp.

T2 Boiler return temp.

DV Drain Valve

SR

SS

TS Viessmann Temp.

SW Sensor Well

T3

T4

System Return

System Supply

Sensor (not used)

System supply temp.

System return temp.

T1

T3

V primary

V secondary

V bypass

Q primary

Q secondary

Boiler circuit flow rate

Heating circuit flow rate

Bypass flow rate

Heat supplied by boiler

Heat consumed by system

V primary < V secondary

T1 > T3

T2 = T4

Q primary = Q secondary

T1 176° F (80° C)

Vsecondary=Vprimary+Vbypass

T4

T2

IMPORTANT

When installing a low-loss header, system mixed supply temperature (T3) must be calculated as follows

Low-loss header design

Product may not look exactly as illustrated.


Standard Equipment

Installation

Standard Equipment

The Vitodens 100-W gas-fired condensing boiler with

Inox-Radial heat exchanger surfaces, modulating stainless steel MatriX cylinder gas burner c/w:



installation fittings with 30 psig pressure relief valve, air vent and pressure gauge



two fill/drain valves



all mounting hardware

The boiler comes fully piped and pre-wired.

Venting material (coaxial) or single pipe PP(s) is to be supplied by Viessmann only. Side wall vent installations must include Viessmann protective screen!

Wall mounting componentry

The following wall mounting components are supplied with the Vitodens 100-W boiler:

 bracket

 bolts

 fittings



Screws for mounting bracket on

- wood studs (2” x 4”)

- metal studs

- brick/concrete wall

How the Vitodens 100-W boiler operates...

The Vitodens 100-W boiler uses a premix combustion system, which is designed to deliver a certain air-gas mixture to the burner for complete combustion. The gas is injected upstream of the blower. The burner and heat exchanger are part of a forced-draft design. The benefits of forced-draft systems are lower component temperatures, direct air-fuel connection (premix) for improved mixing, and longer service life of the boiler due to mild to moderate ambient conditions.

The MatriX cylinder burner, blower and the combination gas valve are factory calibrated and pre-adjusted. A pneumatic link between combustion air and gas flows guarantees optimal boiler performance at all firing rates.

Blower speed is automatically increased or decreased based on heat demand, thereby regulating the amount of combustion air drawn. The pneumatic link between air and gas introduces the required amount of gas for optimal combustion to meet the current heat demand, based on a linear relationship between  P air and  P gas.

Installation Examples

IMPORTANT

The examples on the following pages depict possible piping layouts of the Vitodens 100-W boiler.

Please note that the following examples are simplified conceptual drawings only!

Piping and necessary componentry must be field verified. A low water cut-off (LWCO) must be installed where required by local codes. Proper installation and functionality in the field is the responsibility of the heating contractor.

19

Installation

System Layout 1

Vitodens 100-W, WB1B 26, 35 with one heating circuit

(without optional CombiPLUS)

PRV

AV

System Layout 1 (alternate option)


Maximum Flow Rates

Model WB1B

 t

Output Btu/h

30° F rise (GPM)

35° F rise (GPM)

40° F rise (GPM)

26

83,000

5.5

4.7

4.2

35

108,000

---

6.2

5.4

Note: The use of a low-loss header is recommended if the water flow rate is less than 1.7 GPM (400 L/h) or more than 6.2 GPM (1400 L/h).

The low-loss header is available as accessory part.

Note: Heating circuit C in the examples should be designed to 30º F to 40º F (16.7º C to 22.2º C). For lesser delta T design, system layout designer must use one of the examples (3 or 4) on the following pages.

IMPORTANT

Ensure that a pressure activated by-pass is installed if there are system component(s) in C that may isolate the flow to the pump D .

AV

PRV

20

Legend


A Vitodens

B Room

C Heating

D Heating circuit pump (field supplied)

E Expansion

F Pressure Activated By-Pass


System Layout 2

Vitodens 100-W, WB1B 10-26, 10-35 with...

- DHW storage tank

- low-loss header

- one heating circuit

PRV

AV

TPV

Legend vent


TPV Temperature and pressure relief valve

A Vitodens 100-W gas-fired condensing boiler

B External boiler/DHW controller (field supplied)

C Heating


E DHW storage tank

F DHW tank temperature aquastat or sensor

G DHW circulating pump (field supplied)

H Low-loss header

K Expansion

L Primary pump (boiler circuit, field supplied) with low-loss header only

Installation

IMPORTANT

Primary pump must pump into the boiler (as illustrated).




Model WB1B

 t

Output Btu/h

30° F rise (GPM)

35° F rise (GPM)

40° F rise (GPM)

26

83,000

5.5

4.7

4.2

35

108,000

---

6.2

5.4

IMPORTANT

DHW supply and return piping between boiler DHW connections and the Viessmann DHW tank connections, shall be a minimum of 1” nominal pipe diameter

(irrespective of the ¾” DHW connection outlet sizes provided on the boiler and the DHW tank).

This ensures that the head of the pump is fully utilized to overcome the resistance of the DHW heat exchanger coil and to provide sufficient water flow to the boiler heat exchanger.

In non-Viessmann DHW tank applications, perform, in addition to the above, accurate calculations for DHW tank coil pressure drop versus boiler pump head to ensure sufficient water flow to the boiler heat exchanger.

Failure to heed the above instructions may cause boiler short-cycling and inadequate DHW supply.

21

Installation

System Layout 3


Vitodens 100-W, WB1B 10-26, 10-35 with DHW storage tank and one heating circuit

PRV

AV

IMPORTANT

Primary pump must pump into the boiler (as illustrated).


The low-loss header is available as an accessory part.


Model WB1B

 t

Output Btu/h

30° F rise (GPM)

35° F rise (GPM)

40° F rise (GPM)

26

83,000

5.5

4.7

4.2

35

108,000

---

6.2

5.4

TPV

IMPORTANT

DHW supply and return piping between boiler DHW connections and the Viessmann DHW tank connections, shall be a minimum of 1” nominal pipe diameter

(irrespective of the ¾” DHW connection outlet sizes provided on the boiler and the DHW tank).

This ensures that the head of the pump is fully utilized to overcome the resistance of the DHW heat exchanger coil and to provide sufficient water flow to the boiler heat exchanger.

In non-Viessmann DHW tank applications, perform, in addition to the above, accurate calculations for DHW tank coil pressure drop versus boiler pump head to ensure sufficient water flow to the boiler heat exchanger.

Failure to heed the above instructions may cause boiler short-cycling and inadequate DHW supply.

22

Legend vent


TPV Temperature and pressure relief valve


B External boiler/DHW controller (field supplied)

C Heating


E DHW storage tank

F DHW tank temperature aquastat or sensor

G DHW circulating pump (field supplied)

H Closely spaced tees, 4x pipe Ø or 12” (305 mm)*

K Expansion

L Primary pump (boiler circuit, field supplied) with low-loss header only

* A low-loss header offers additional benefits not

provided by a pair of closely spaced tees.

Viessmann strongly recommends and prefers the

use of a low-loss header over closely spaced tees.

See page 18 for details.


System Layout 4

Vitodens 100-W, WB1B 26, 35 with one heating circuit and the CombiPLUS

Installation


Model WB1B

 t

Output Btu/h

30° F rise (GPM)

35° F rise (GPM)

40° F rise (GPM)

26

83,000

5.5

4.7

4.2

35

108,000

---

6.2

5.4



Built-in pump residual head for the heating system side is 7.5 ft. of water column at the boiler maximum flow rate of 6.2 GPM.

Note: Heating circuit C in the examples should be designed to 30º F to 40º F (16.7º C to 22.2º C). For lesser delta T design, system layout designer must use one of the examples (5 or 6) on the following pages.

Legend

PRV Pressure relief valve (boiler)

PRV*Pressure relief valve (DHW 150 psi)

WSE Water softner equipment

A Vitodens

B Room

C Heating

D CombiPLUS

E Expansion

23

Installation

System Layout 5

Vitodens 100-W, WB1B 10-26, 10-35 with...

- CombiPLUS Kit

- low-loss header

- one heating circuit





Model WB1B

 t

Output Btu/h

30° F rise (GPM)

35° F rise (GPM)

40° F rise (GPM)

26

83,000

5.5

4.7

4.2

35

108,000

---

6.2

5.4

24

Legend vent


PRV*Pressure relief valve (DHW 150 psi)

WSE Water softener equipment


B External boiler / system controller (field supplied)

C Heating


E CombiPLUS

F LLH

G Expansion


System Layout 6

Installation

Vitodens 100-W, WB1B 10-26, 10-35 with CombiPLUS and one heating circuit without LLH


The low-loss header is available as an accessory part.


Model WB1B

 t

Output Btu/h

30° F rise (GPM)

35° F rise (GPM)

40° F rise (GPM)

26

83,000

5.5

4.7

4.2

35

108,000

---

6.2

5.4

Legend vent


PRV* Pressure relief valve (DHW 150 psi)

WSE Water softener equipment


B External system controller (field supplied)

C Heating


E CombiPLUS

F Closely spaced tees, 4x pipe Ø or 12” (305 mm)*

G Expansion

* A low-loss header offers additional benefits not

provided by a pair of closely spaced tees.

Viessmann strongly recommends and prefers the

use of a low-loss header over closely spaced tees.

See page 18 for details.

25

26

Design

System Design Considerations


IN THE COMMONWEALTH OF MASSACHUSETTS...

- this product shall be installed by a licensed plumber or gas fitter.

- the flexible connector (if used) may not exceed 36”.

- any level type shutoff used must be of tee handle type.

Boiler location

As a direct vent appliance, the Vitodens 100-W may be installed for room air independent operation (sealed combustion) regardless of size and ventilation method of the room in which it is located.

The Vitodens 100-W may be installed, for example, in the main living area of a house, in non-ventilated utility rooms, cupboards, closets and alcoves with no clearance required from combustible materials, as well as in attics with a direct outlet for the flue gas/fresh air system. Follow all local and national codes.

System layout



The max. boiler water temperature for ...

-space heating is 176° F (80° C).

-DHW production is 176° F (80° C).

To minimize distribution losses, Viessmann recommends that the heating and domestic hot

water systems be based on a maximum boiler supply temperature of 158° F (70° C).



Due to the low return temperatures required for gas condensing, avoid the use of mixing valves in the heating circuit whenever possible.

If mixing valves are required, e.g. for multi-circuit systems or underfloor heating systems, only 3-way mixing valves may be used.

Do not use 4-way mixing valves in a system with boilers.

Flue gas system

Viessmann coaxial PPS (Polypropylene - flame retardant) concentric flue gas/fresh air systems and two-pipe stainless steel/CPVC systems for room air independent operation (sealed combustion) and side wall venting are tested to ANSI Z21.13 - CSA 4.9 - 2007 standards and are certified together with the Vitodens 100-W boiler as a constructional unit. The Vitodens 100-W boiler may also be vented vertically or horizontally, using a metallic

AL29-4C® special stainless steel, or non-metallic CPVC single-wall, room air dependent venting system (UL/ULC listed for category IV).

For a more detailed description of the direct vent and single-wall vent system, please refer to the Vitodens

Venting System Installation Instructions.

Water connections

Vitodens 100-W boilers can be used in any fully pumped hot water heating system.

Minimum system pressure is 0.8 bar (12 psig).

Chemical corrosion protection products

Corrosion does not typically occur in sealed heating systems which have been correctly installed and are correctly operated.

Many manufacturers of plastic pipes recommend the use of chemical additives. In this case, only commercially available corrosion protection products that have been approved for boilers with domestic hot water heating via single-wall heat exchangers (instantaneous plate heat exchangers or DHW tanks) may be used.

Flue gas temperature protection

Viessmann coaxial PPS (Polypropylene - flame retardant) flue pipes used for the Vitodens 100-W are rated for max. flue gas temperatures of up to 230° F (110° C).

Flue gas temperature protection is also included although the maximum permissible flue gas temperature will not be exceeded in any operating condition or in the event of malfunctioning.

Underfloor heating systems

For underfloor heating systems Viessmann recommends the use of plastic tubing with an oxygen diffusion barrier in order to prevent the diffusion of oxygen through tubing.

If plastic tubing without an oxygen diffusion barrier is used in underfloor heating systems, Viessmann recommends that such systems be separated from the boiler with a heat exchanger.

Low water cut-off

A low water cut-off may be required by local codes.

If the boiler is installed above the radiation level, a low water cut-off device of approved type must be installed in all instances. An approved low water cut-off device that meets government and local regulations must be provided by the heating contractor.

Do not install an isolation valve between the boiler and the low water cut-off. The Vitodens 100-W boiler has a built-in flow switch, which may be accepted by local codes in lieu of a low water cut-off.

Water Conditions for DHW CombiPLUS

Media: pH value 6.5 to 12, glycol max. 30%

DHW (max. hardness): Chloride up to 250 mg/L

Hardness up to 358 ppm

(= max. 0.278 kg/m 3 lime deposit)


System Design Considerations

(continued)

Design

Oxygen diffusion barrier underfloor tubing

The boiler warranty does not cover leaks resulting from corrosion caused by the use of underfloor plastic tubing without an oxygen diffusion barrier. Such systems must have the non-oxygen diffusion barrier tubing separated from the boiler with a heat exchanger.

Viessmann recommends the use of underfloor plastic tubing with an oxygen diffusion barrier.

Water quality

Treatment for boiler feed water should be considered in areas of known problems, such as where a high mineral content and hardness exist. In areas where freezing might occur, an antifreeze may be added to the system water to protect the system. Please adhere to the specifications given by the antifreeze manufacturer.

Do not use automotive silicate based antifreeze. Please observe that an antifreeze/water mixture may require a backflow preventer within the automatic water feed and influence components such as diaphragm expansion tanks, radiation, etc. Maximum antifreeze content is 50% for the

Vitodens 100-W boiler (when used with DHW CombiPLUS max. content is 30%). Do not use antifreeze other than specifically made for hot water heating systems.

The system may also contain components which might be negatively affected by antifreeze.

Check total system frequently when filled with antifreeze.

Advise system operator/ultimate owner that system is filled with a glycol mix.

The heating contractor must provide a MSDS (Material

Safety Data Sheet) for the antifreeze used to the system operator/ultimate owner.

Warranty

Our warranty does not cover damages resulting from the following:

- installation or service by unqualified and unlicensed

personnel.

- attempting to perform any repair work on the boiler other than that mentioned in the boiler

literature.

- tampering with or attempting to readjust the factory settings of the combination gas valve

- leaks resulting from corrosion caused by the use of underfloor plastic tubing without an oxygen diffusion barrier.

For detailed warranty information, please read warranty sheet supplied with product.

27

28

Venting

Coaxial System

Flue

Intake Intake


Intake

Flue

Intake

Coaxial, horizontally vented, PP(s) (Viessmann supplied)

Vent system diameter (mm)

Maximum equivalent length ft. (m)

60/100

82 (25)

80/125

98 (30)

100/150

118 (36)

Coaxial, vertically vented, PP(s) (Viessmann supplied)

Vent system diameter (mm)


60/100

82 (25)

80/125

98 (30)

100/150

118 (36)


Two Pipe System

Flue

Intake

Venting

Two pipe system (room air independent) horizontally vented

Intake

Flue

Vent system diameter (in)


2*

86

(20)

3

164

(50)

4

200

(61)

*stainless steel is not available in 2”

Combustion air: CPVC, PVC, ABS and stainless steel (field supplied)

Flue gas: CPVC and stainless steel

(field supplied)

PP(s): (Viessmann supplied)

Two pipe system (room air independent) vertically vented



2*

86 (20)

3

164 (50)

4

200 (61)


Combustion air: CPVC, PVC, ABS and stainless steel

(field supplied)

Flue gas: CPVC and stainless steel (field supplied)


Flue

Intake

Two pipe system (room air independent) hybrid


2* 3


86 (20) 164 (50)


4

200 (61)


(field supplied)

Flue gas: CPVC and stainless steel (field supplied)


29

30

Venting

Single Pipe System

Intake Intake


Flue

Intake Intake

Flue

Single pipe system (room air dependant) horizontally vented


2* 3


86 (20) 164 (50)


CPVC and stainless steel (field supplied)

PP(s) (Viessmann supplied)

4

200 (61)

Single pipe system (room air dependant) vertically vented


2* 3


86 (20) 164 (50)


CPVC and stainless steel (field supplied)


4

200 (61)


Flexible System

Flue

Intake

Venting

Flexible two pipe system (room air independent)



80 flex

2” comb.

65 (20)

80

123 (37)

100

150 (46)


(field supplied)

Flue gas: PP(s) (Viessmann supplied)

Flue

Flexible single pipe system (room air dependant)



80

123 (37)

100

150 (46)


Intake Intake

31

Quick Reference

°C °F

-40 -40

-35 -31

-25 -13

-20 -4

-18 0

-16 +3

-14 +7

-12 +10

-10 +14

-9 +16

-8 +18

-7 +19

-6 +21

-5 +23

-4 +25

-3 +27

-2 +28

-1 +30

0 +32

+1 +34

+2 +36

+3 +37

+4 +39

+5 +41

+6 +43

+7 +45

+8 +46

+9 +48

+10 +50

+54

+14

+16 +61

+64

+68

+25 +77

+30

+95

+40 +104

+140

+70

+80

+90

+100 +212

+110 +230


Printed on environmentally friendly (recycled and recyclable) paper.

Viessmann Vitodens 100, WB1B (CombiPLUS Version) Wall-Mounted Gas Boiler Manual

Technical Data Manual

VITODENS

100-W

Product Information

Product Information

Specifications

Specifications

Specifications

Boiler Dimensions Without Bottom Piping Connections

Boiler Dimensions With Piping Connections

CombiPLUS Dimensions and Piping Connections

Boiler Minimum Clearances

CombiPLUS installation options

Heating Circuit Pumps

IMPORTANT

Heating Circuit Pumps

Heating Circuit Pumps

Heating Circuit Pumps

Mounting

Condensate

IMPORTANT

Venting Options / Electrical Connections

Accessories

IMPORTANT

Standard Equipment

IMPORTANT

System Layout 1

IMPORTANT

System Layout 2

IMPORTANT

IMPORTANT

System Layout 3

IMPORTANT

IMPORTANT

System Layout 4

System Layout 5

System Layout 6

System Design Considerations

System Design Considerations

Coaxial System

Two Pipe System

Single Pipe System

Flexible System

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State

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