Viessmann | Vitodens 100-W WB1C | User manual | WB1C System Boiler Wiring

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Viessmann | Vitodens 100-W WB1C | User manual | WB1C System Boiler Wiring | Manualzz

Note on installation

for heating engineers

System boiler wiring instructions

for Vitodens 100-W, Typ WB1B & Typ WB1C

The Vitodens 100-W system boiler offers several installation alterna- tives.

From traditional 'Y' or 'S' plan

(2-pipe system) to weather compen- sated 4-pipe system connected to an un-vented DHW cylinder using the integral expansion vessel and diverter valve.

The advantages of connecting the system boiler to a 4-pipe system are as follows:

• The DHW circuit operates indepen- dently of the CH circuit

• Dual temperature control, which means the CH circuit can be operated on weather compensated system (reduced flow temperature)

• Using the boilers temperature cut-out device and integral diverter valve to protect the cylinder from overheating.

5414 394 8/2009/14

Option 1: 4-pipe system using an un-vented cylinder

®

©

@

M

Radiators

® Boiler

© DHW-cylinder

@ Motorised valve (Energy cut-out)

Viessmann 4-pipe system

Note: It is recommended that the coil output of the cylinder is greater than 10 kW to prevent long hot water re-heat periods.

DHW has priority.

The boiler is factory fitted with an 8 l expansion vessel, pressure safety valve (3 bar) and diverter valve.

If an existing or third party un-vented cylinder is used in conjunction with the Vitodens 100-W system boiler a

2-port (Energy cut-out) valve may be fitted in the DHW circuit. In this case the 2-port valve, cylinder thermostat and timer has to be electrically wired through the provided control box

(see wiring example).

2

Electrical wiring example fo r Option 1

With existing CH/DHW programmer

5

@

@

®

®

©

@

®

Terminals in the control unit

® Cylinder demand terminal box

© Cylinder thermostat

@ Safety temperature sensor

® Valve

® Room thermostat (clock thermo- stat)

@ Terminal box (on site)

@ Power supply 230 V, 50 Hz

3

Electrical wiring example fo r Option 1 (cont.)

With Viessmann Vitotrol 100, RF/RF2 or standard room thermostat

5

@

®

©

@

@

®

®

Terminals in the control unit

® Cylinder demand terminal box

© Cylinder thermostat

@ Safety temperature sensor

® Valve

Other Viessmann secondary controls

(existing programmer to be omitted) - see separate matrix.

• Weather compensation + 2-channel digital timer

® Room thermostat (clock thermo- stat)

@ Terminal box (on site)

@ Power supply 230 V, 50 Hz

• Vitotrol 100, RF1 - analog; DHW time function limited (either as CH or constant)

• Vitotrol 100, RF2 - digital; 2-chan- nel with CH and DHW time control options.

4

Option 2: 4-pipe system with open vented cylinder

Viessmann 4-pipe system with open vented hot water or with Vitocell unvented cylinder

®

©

Radiators

® Boiler

Note: It is recommended that the cylinder coil output is greater than 10 kW to prevent long hot water re-heat periods.

DHW has priority.

The primary circuit is sealed system.

The boiler is factory fitted with an 8 l expansion vessel, pressure safety valve (3 bar) and diverter valve.

© Open vent DHW-cylinder or

Vitocell

5

Electrical wiring example fo r option 2

X21

7

X20

X

©

4 3 2 1

@ X1

CN2

GAS PUMP FAN

@ L N 1 L N

® ®

OT

®

� Tank sensor connection

(sensor is optional - part no. 7178 348)

Outside temperature sensor

(accessory)

® Open Therm device

© Connection Line (accessory)

@ Jumper (remove when connecting a room thermostat)

® Power supply

(230 V, 50 Hz)

® Vitotrol 100

(room temperature ontroller)

Other Viessmann secondary controls

(existing programmer to be omitted) - see separate matrix

• Weather compensation + 2-channel digital timer

• Vitotrol 100, RF1 - analog;

DHW time function limited (either as CH or constant)

• Vitotrol 100, RF2 - digital;

2-channel with CH and DHW time control options.

6

Option 3: Traditional 'Y' or 'S'-plan system (2-pipe)

Schematic Sealed Primary System

®

® ®

@ @

@

M

®

M

©

Radiators

® Boiler

© DHW-cylinder

@ Motorised valve

Note: Schematic shows safety valve, expansion vessel, pressure gauge and pump being external of the boiler. The Vitodens 100-W system boiler has all these components already factory fitted.

® Pump

® Gauge

@ Expansion vessel

@ Savety valve

7

Electrical wiring example - S-plan system with Vitodens 100-W

M

1-

®

M

1-

®

© @

L N @

S1

®

Power supply 230 V, 50 Hz

® Time controller

© Roomthermostat (clock thermo- stat)

@ Cylinder thermostat

@

M

1-

@

L

N

1

L

N

N

L

@

X1

CN2

® Zone valve

® Pump

X9 Terminals in the control unit

� Pump connection

Viessmann Werke GmbH&Co KG

D-35107 Allendorf

Telefon: 06452 70-0

Telefax: 06452 70-2780 www.viessmann.de

8

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