Viessmann Main Boiler Documentation Vitoligno 300-C Manual

Technical Data Manual

for model numbers and pricing: see price list

VITOLIGNO 300-C

Product may not be exactly as shown

Vitoligno 300-C, 32 and 48

Wood pellet floor mounted boiler, with Ecotronic weather-compensated, digital boiler and heating circuit control unit

Heating input: 44 MBH to 193 MBH

13 kW to 57 kW

5790 981 - 01 05/2017

H

Please file in service binder.

2

Introduction

Product Description

Vitoligno 300-C Technical Data

Benefits at a glance



Fully automatic compact pellet boiler.





Efficiency: up to 85%.

Innovative combustion technology for lowest dust



Low fuel consumption through high efficiency,

modulating operation and weather-compensated control.



Automatic combustion chamber ash removal through

a stainless steel finned grate ensures high operational

reliability and long cleaning intervals.



Automatic ash removal compresses the ash into the

ash box - mobile ash box only needs to be emptied

once or twice a year depending on the amount of consumed.



High operational reliability provided by rotary lock valve,

for 100% burn-back protection.



Low power consumption – automatic ignition with

ceramic heating element.



Ecotronic control unit with plain text user prompts

and automatic function monitoring, plus buffer tank

charging control and solar function.



Extensive accessories for pellet supply and storage



Software update function via SD card



Web-enabled via Vitoconnect (accessory) for operation

and service using Viessmann apps.

Lambda probe, boiler water temperature sensor and flue gas temperature sensor for combustion control are integral to the boiler. Outdoor temperature sensor and temperature sensor for DHW tank are included with the boiler body.

Low temperature protection package

The low temperature protection package is required to protect the boiler from temperatures below the dew point.

Accessories (specific to the system)

Heating system with heating water buffer tank. If using heating water buffer tanks, the buffer temperature sensor set must be ordered separately.

Heating system with heating circuit with mixing valve

An extension kit (accessories) is required for each heating circuit with mixing valve.

DHW heating by a solar thermal system

For DHW heating by the solar thermal system, the temperature sensors for the solar circuit (collector temperature sensor and tank temperature sensor) have to be ordered separately.

Delivered condition

Boiler body (in shipping crate) with:



Fitted thermal insulation mats



Combustion chamber door



Ash door



Automatic ignition



Variable speed flue gas fan



Automatic ash removal and mobile ash box



Cleaning accessories



Ecotronic boiler control unit with user prompts


Product Description

(continued)

Introduction

Legend

A Integral suction turbine

B Pellet hopper (version with vacuum system only)

C Variable speed flue gas fan for modulating operation

D Automatic heat exchanger cleaning

E Ecotronic control unit with user prompts

F Self-cleaning rotary finned grate made from stainless

steel

G Combustion chamber made from high temperature- ceramics

H Rotary lock valve for 100% burn-back protection

K Automatic ash removal with mobile ash box

The Vitoligno 300-C is a fully automatic wood pellet boiler. The boiler has an efficiency of up to 85% when converting pellets into heat.

The wood pellet boiler offers a wide spectrum of applications – from low energy houses to buildings with a higher heat demand.

Modulation of 1:3 leads to low consumption and clean combustion under partial load conditions. A ceramic ignition unit consumes little power, whilst innovative combustion technology featuring dual combustion control with lambda probe and flue gas temperature sensor keeps dust values low.

The Vitoligno 300-C offers versatile and flexible supply system options for almost any application. Pellets are supplied to the boiler either via a flexible screw conveyor or a vacuum system. Thanks to its compact design, it is suitable for installation in rooms with low ceiling heights. Versions with pellet supply via a vacuum system are supplied with a pellet hopper with integral suction turbine and capacity for one-day operation. The wood pellet boiler is convenient to use and is partially automated. The automated features include ignition, heat exchanger cleaning, the selfcleaning rotary finned grate and fully automatic compaction of ash. The mobile ash box only needs emptying once or twice a year. Thanks to the sealed ash box, ash removal is also clean and stress-free.

Operating the boiler is easy with the weathercompensated digital Ecotronic control unit. The integral

Ecotronic controls up to four heating circuits with mixing valve. The Ecotronic controls boilers with pellet supply, heating circuits and the tank temperature.

The clear display, with graphic capability and multiple line plain text user prompts, provides intuitive operation and easy adjustment of all relevant parameters.

In combination with a solar thermal system, current solar data is also shown on the display.

The Vitotrol 350-C (optional accessory) control unit extension enables the wood pellet boiler to be operated from the living space as well. With the 5 in. (125 mm) color touchscreen display in 16:9 format, operation couldn’t be easier. The Vitotrol 350-C enables remote control of the boiler with all relevant adjustment options and display of all relevant information about the boiler and the heating water buffer tank. Optionally, the Vitotrol 350-C can be used not only as a remote controller but also as a cascade controller. Up to four boilers can be connected in a cascade. Additionally, one oil/gas boiler can be enabled via the lead boiler.

The most important control circuits of the cascade system can be displayed and operated.

3

Introduction

Principles of Pellet Combustion


What are wood pellets?

Wood pellets are made from 100 percent natural wood remnants. This raw material is waste matter created by the wood industry in large volumes through planing or sawing.

Wood remnants are compressed under high pressure and formed into pellets, i.e. pressed into a cylindrical shape.

The raw material is stored and transported under completely dry conditions. System users should also ensure completely dry storage conditions. This is the only way to guarantee optimum and effective combustion.

Requirement

Diameter

Length

Bulk density in delivered condition

Net calorific value in the delivered condition

Water content in delivered condition

Fines content in the delivered condition

Mechanical strength in the delivered condition

Ash content, free from water

Ash softening temperature

This value is only binding for pellets certified to CANPlus.

It indicates the temperature at which the wood ash is deformed and can therefore cause fusions in the combustion chamber.

Chlorine content, free from water

Sulphur content, free from water

Nitrogen content, free from water

Pellet requirements

It is recommended that the pellets used complies with the requirements of the Pellet Fuel Institute (PFI - Standard or

PFI - Premium) and/or CANPlus grade A1 and/or CAN/CSA

- ISO 17225 Part 2 Standard.

PFI -

Standard lb/cuft

(kg/m³)

MBH/lb (MJ/kg)

MBH/lb (kWh/kg) m-% m-% m-%

%

°F

(°C) in.

(mm) in.

(mm)

0.230 - 0.285

(5.84 - 7.25)

A maximum of 1% may be longer than

1.5 in.

(38 mm)

38-48

(608-769)

--

--

≤ 10

≤ 1

≥ 95

--

--

CAN plus-A1 Specification as per

CAN/CSA

ISO 17225-2

Grade A1

0.236 ± 0.039

(6 ± 1)

A maximum of 1% may be longer than

1.7 in. (40 mm), but no longer than

1.77 in. (45 mm)

D06

0.125 to 1.575

(3.15 to 40)

37-47

(600 to 750)

≥ 6.9 ( ≥ 16.5)

(BD600)

Q16.5

≥ 7.1 ( ≥ 4.6) Q4.6

≥ 10 M10

≤ 1

≤ 97.5

F1.0

DU 97.5

≤ 0.7

≤ 2200

( ≤ 1200)

A0.7

--

-m-% m-% m-%

≤ 300 ppm

--

--

≤

≤

0.02

0.04

≤ 0.3

C10.2

S0.04

N0.03

m-% = percentage by mass

Pellet Quality Characteristics

High quality pellets:



Smooth shiny surface



Uniform length



Low proportion of dust



Sink in water

Low quality pellets:



Cracked rough surface



Widely varying length



High proportion of dust



Float in water

Types of Pellet Delivery

4

Pellets are sold in sacks, in bulk on pallets and loose.

In their loose form, pellets are transported by silo tanker and pumped into the storage room via a hose system.

Careful handling of pellets ensures a low proportion of dust, perfect fuel charging and a constant boiler heating output.

Note: For boilers equipped with the vacuum system, the pellet hopper inside the boiler has a capacity of approx. 3.5 cu. ft (100 L). This corresponds to approx. 143 lbs. (65 Kg) of pellets.


Specification

Boiler model 300-C

Input

Output

MBH

(Kw)

MBH

(Kw)

Efficiency

– At full load

– At partial load

Heat exchanger surface area

Supply temperature

Fixed High Limit (FHL)

Adjustable high limit range

Max. operating pressure at 230°F (110°C)

Power Supply

ft 2 (m

%

%

2 )

°F (°C)

°F (°C) psi

(bar)

Voltage

Phase

Hz

Amperage

Overall dimensions

Total length h

Total width b (boiler)

Total width d (boiler with pellet hopper)

Total width c (boiler with connection unit for the flexible screw conveyor)

Height a (boiler)

Total height m

Total weight

– Boiler incl. thermal insulation and pellet hopper

– Boiler incl. thermal insulation and connection unit for flexible

screw conveyor

Pellet hopper capacity (with vacuum system)

Volume of ash box

Boiler water content

Boiler connections

Boiler supply

Boiler return

Safety connection

Drain

Flue gas

Average temperature (gross)

– At upper heating output

– At partial load (33% of upper heating output)

Mass flow rate

– At upper heating output


CO

2

content in the flue gas

– At the upper rated heating output


Flue outlet

Required draught (at full load)

Max. permiss. draught *1

*1 Install a barometric damper in the chimney (see page 23).

in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) lb. (kg) lb. (kg) cu ft. (L) cu ft. (L)

USG (L)

NPT

NPT

NPT

NPT

°F (°C)

°F (°C) lb/h (kg/h) lb/h (kg/h)

%

%

7 in.

7

(mm)

“w.c. (Pa)

“w.c. (Pa)

32

44-129

(13-38)

37.4-109.6

(11-32)

85

85

30.9 (2.87)

230 (110)

203 (95)

45

(3)

240

1

60

20

48 d (1224)

30 d (765)

52 b (1332)

50 (1244)

60 f (1538)

61 b (1560)

1433 (650)

1356 (615)

3.5 (101)

2.3 (65)

47.5 (180)

1 b “

1 b “

1 b “ c “

266 (130)

176 (80)

231 (105)

53 (24)

13

11

6

(150)

0.02 (5)

0.06 (15)

Introduction

48

64-193

(19-57)

54.4-164

(16-48)

85

85

30.9 (2.87)

230 (110)

203 (95)

45

(3)

240

1

60

20

48 d (1224)

30 d (765)

52 b (1332)

50 (1244)

60 f (1538)

61 b (1560)

1433 (650)

1356 (615)

3.5 (101)

2.3 (65)

47.5 (180)

1 b “

1 b “

1 b “ c “

275 (135)

176 (80)

273 (124)

64 (29)

13

11

6

(150)

0.02 (5)

0.06 (15)

5

Introduction

Dimensions


6

Legend

A Version with pellet hopper

(pellet supply via vacuum system)

B Version with connection unit

(for pellet supply via flexible screw conveyor)

AGA Flue outlet 6 in. (150 mm)

E Drain c in. NPT

KR Boiler return 1 b in. NPT

KV Boiler supply 1 b in. NPT

SA Safety header 1 b in. NPT

Boiler model 300-C a*

32 to 48 in. (mm) 60 f (1539) b in. (mm) 30 d (765) c (total width of version

with pellet supply via

flexible screw conveyor) d (total width of version

with pellet supply via

vacuum system) e in. (mm) 49 (1244) in. (mm) 52 b (1332) f* g* h in. (mm) 36 a (920) in. (mm) 19 d (487) in. (mm) 58 d (1478) in. (mm) 48 d (1224) l k* in. (mm) 31 d (792) in. (mm) 19 a (488) m* (height with SA connection) in. (mm) 61 b (1560)

* includes adjustable feet height set to 1 a in. (30 mm)


Clearances

Minimum clearances for version with pellet supply via vacuum system

Introduction

Note: The specified wall clearances are required for installation and maintenance work.

Recommended minimum service clearances

For typical Vitoligno 300-C series boiler installations,

Viessmann recommends installing the boiler with the service clearances shown in the illustrations. b c

Minimum clearances vacuum system a in. (mm) d in. (mm) in. (mm) in. (mm) g h e f in. (mm) in. (mm) in. (mm) in. (mm)

Minimum room height in. (mm)

30 (765)

36 (920)

35 b (900)

31 b (800)

16 (400)

20 (500)

4 (100)

22 b (570)

79 (2000)

Legend

A Boiler

B Pellet hopper

Minimum clearances for version with pellet supply via flexible screw conveyor

Recommended minimum service clearances

For typical Vitoligno 300-C series boiler installations,

Viessmann recommends installing the boiler with the service clearances shown in the illustrations. b c

Minimum clearances flexible screw conveyor a in. (mm) 30 (765) d in. (mm) in. (mm) in. (mm)

26/35

36 (920) b

31

* (670/900 b (800)

* ) e f in. (mm) in. (mm)

Minimum room height in. (mm)

16 (400)

20 (500)

79 (2000)

* Dimension c, when the flexible screw conveyor

is routed to the back parallel to the boiler.

Legend

A Boiler

B Connection unit for pellet supply with flexible screw conveyor (can be pivoted 90° to the front or back)

Clearance to combustibles


Top

Sides (left and right)

Front

Rear

Floor

32

0

0

0

48

0

0

0

0 0 noncombustible noncombustible

7

8

Introduction

Clearances

Legend

A Pellet discharge or connector at the pellet silo

B Hose with screw conveyor

*

Legend

A Pellet discharge or connector at the pellet silo

B Hose with screw conveyor


Flexible screw conveyor

Specification

The boiler supply with flexible screw conveyor can either be connected to the room discharge with screw conveyor supply system or to a pellet silo.

The rotary adjuster at the pellet silo or at the room discharge, as well as the drive unit of the flexible screw conveyor on the boiler, can be fitted in different positions.

Further details regarding positioning:

Dimension a

Dimension b (hose length) in.

(mm) in.

(mm) min. 67

(min. 1700) min. 55

(min. 1390)

* Note: Observe the minimum bending radius of the flexible screw conveyor.

Intended use

The appliance is intended solely for installation and operation in sealed unvented heating systems. It is only designed for heating up heating water that is of potable water quality.

Intended use presupposes that a fixed installation in conjunction with permissible, system-specific components has been carried out.

Commercial or industrial usage for a purpose other than heating the building or DHW shall be deemed inappropriate.

Any usage beyond this must be approved by the manufacturer in each individual case.

Incorrect usage or operation of the appliance (e.g. the appliance being opened by the system user) is prohibited and will result in an exclusion of liability.

Incorrect usage also occurs if the components in the heating system are modified from their intended use

(e.g. if the flue gas and ventilation air paths are sealed).

Connection unit, feed screw conveyor with drive unit, flexible screw conveyor (can be pivoted 90°)


Pressure Drop

Introduction

Legend

A Boiler model Vitoligno 300-C, 32 and 48 kW

The Vitoligno 300-C is only suitable for fully pumped hot water heating systems.


32 USGPM

48 USGPM

(m

(m 3

3 /h)

/h))

∆ T = 20 ° F (10 K)

Flow rate

11.0 (2.5)

16.4 (3.7)

Note: This boiler does not require a flow switch.

∆ T = 30 ° F (15 K)

Flow rate

7.3 (1.7)

10.9 (2.5)

∆ T = 40 ° F (20 K)

Flow rate

5.5 (1.2)

8.2 (1.9)

9

10

Control

Ecotronic Control Unit


Ecotronic Specification

Weather-compensated digital boiler and heating circuit control unit for controlling three heating circuits with mixing valve, two heating circuits with mixing valve plus DHW heating or one heating circuit with mixing valve, one DHW heating and one solar circuit. An additional, fourth heating circuit with mixing valve can be connected via the KM-BUS.



With separately adjustable periods, heating curves,

set temperature values and heating programs.



With tank temperature controller



With intelligent buffer management



With integral diagnostic system and additional functions



With commissioning assistant. An extension

(accessories) is required for each heating circuit with

Design and functions (Modular design)

The Ecotronic boiler control unit is a decentralized microprocessor system. To control the boiler system, the Ecotronic comprises three PCBs integrated into the boiler (PCB for boiler controller, heating circuit PCB and boiler-specific auxiliary PCB) and the programming unit with display integrated into the boiler. A sensor tank management is part of the standard Ecotronic version.

Functions



Continuously regulating air dampers optimize the heat-

up and burnout process.



Lambda probe enables efficient combustion control,

minimum emission levels and maximum efficiency.



Control of the return temperature raising facility.



Supporting auxiliary and service functions.



Enabling a second heat generator.



Activation of tank priority control if required.



Control of automatic changeover device (accessory)



Available languages:

English, German Danish, Estonian, French, Italian,

Croatian, Latvian, Lithuanian, Dutch, Norwegian,

Polish, Romanian, Russian, Swedish, Serbian,

Slovakian, Slovenian, Spanish, Czech, Hungarian

To reduce the heat-up output, the reduced room temperature is raised when outdoor temperatures are low.

To shorten the heat-up time after a setback phase the supply temperature is raised for a limited time.

Ecotronic specification

Rated voltage................240VAC

Rated frequency..............60 Hz

Rated current..................20 FLA


Ecotronic Control Unit

(continued)

Control

Overview of connection options

Key

HC Heating circuit

SOL Solar circuit

FRC Flow rate control

To Ecotronic (HKK PCB)

1 heating circuit

2 heating circuit

3 heating circuit

4 heating circuit

1 heating circuit and DHW




Only DHW

1 heating circuit and solar




1 heating circuit, solar and DHW




Solar and DHW only

Solar only

HC1

HC1

HC1

--

--

HC1

HC1

HC1

--

HC1

HC1

--

--

--

(CP)

HC2

HC2

DHW+(CP)

(CP)

DHW+(CP)

(CP)

HC2

HC2

HC2

DHW+(CP)

(CP)

DHW+(CP)

HC2

HC2

HC2

DHW+(CP)

DHW+(CP)

(CP)

(CP)

(CP)

HC2

(CP)

(CP)

HC2

(CP)

(CP)

HC2

(CP)

DHW+(CP)

(CP)

DHW+(CP)

(CP)

(CP)

DHW+(CP)

(CP)

(CP)

DHW+(CP)

HC2

(CP)

DHW+(CP)

DHW+(CP)

HC2

DHW+(CP)

DHW+(CP)

(CP)

(CP)

HC1

HC1

HC1

--

HC1

HC1

HC1

HC1

--

HC1

HC1

--

--

HC1

--

HC1

--

HC1

HC1

HC1

HC1

HC1

--

HC1

HC1

--

--

HC1

HC1

HC1

HC1

--

--

Connection group

A1

HC1

--

HC1

--

HC1

HC1

HC1

HC1

--

HC1

HC1

HC1

HC1

HC1

A2

(CP)

(CP)

HC2

(CP)

(CP)

HC2

HC2

(CP)

(CP)

HC2

HC2

(CP)

DHW+(CP)

DHW+(CP)

(CP)

Key

DHW heating

(CP) DHW recirculation pump, optional

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

SOL

--

--

--

SOL

SOL

SOL

SOL

SOL

--

DHW+(CP)

(CP)

--

--

--

--

HC3

DHW+(CP)

(CP)

--

--

--

HC3

(CP)

DHW+(CP)

--

--

HC3

(CP)

--

--

--

--

A3

--

--

(CP)

--

--

HC3

(CP)

--

DHW+FRC

HC2

HC2

HC1

HC1

DHW+FRC

HC3

HC3

HC2

HC2

HC1

HC4

HC3

HC3

HC2

--

DHW+FRC

--

HC1

--

HC2

--

--

HC1

HC2

HC3

HC2

--

DHW+FRC

HC1

HC1

DHW+FRC

HC2

HC2

HC1

HC1

HC3

HC2

HC2

HC1

HC4

HC2

--

DHW+FRC

--

To “extension module for heating circuit with mixing valve” (KM-BUS subscriber)

Rotary selector setting

1

--

HC1

--

HC1

HC2

--

HC3

HC2

HC1

HC4

HC3

HC2

--

DHW+FRC

HC1

HC1

--

--

3

--

--

--

--

--

--

--

5

--

--

HC3

--

--

HC4

--

--

--

--

--

--

--

--

--

DHW+FRC

--

--

--

--

--

--

HC2

--

--

HC3

HC2

HC4

HC3

--

--

--

DHW+FRC

--

--

DHW+FRC

HC2

HC2

DHW+FRC

HC3

HC3

HC2

HC4

HC3

--

--

--

HC2

--

--

--

HC3

HC2

--

HC4

HC3

--

--

--

DHW+FRC

--

--

--

DHW+FRC

HC2

HC2

--

--

DHW+FRC

HC3

HC3

HC2

DHW+FRC

HC4

HC4

HC3

--

--

--

HC3

--

DHW+FRC

--

HC4

--

--

--

--

--

--

--

--

--

HC3

--

HC4

--

--

--

--

--

--

--

DHW+FRC

--

--

DHW+FRC

--

HC3

DHW+FRC

HC4

--

--

--

11

12

Control

Ecotronic Accessories


Vitotrol 200-A

KM-BUS subscriber



Displays:

– Room temperature

– Outdoor temperature

– Operating condition



Settings:

– Set room temperature for standard mode (normal room

The set room temperature for reduced mode (reduced room temperature) is set at the control unit.

– Operating program



Party and economy mode can be enabled via keys



Integral room temperature sensor for room temperature hook-up (only for one heating circuit with mixing valve)

Installation location:



Weather-compensated mode:

Installation anywhere in the building



Room temperature hook-up:

The integral room temperature sensor captures the actual room temperature and effects any necessary correction of the supply temperature.

The captured room temperature depends on the site:

– Main living room on an internal wall opposite radiators

– Not on shelves or in recesses

– Never in the immediate vicinity of doors or close

to heat sources

(e.g. direct sun, fireplace, etc.).

Connection:



2-core lead 18 AWG, length max. 164 ft. (50 m)

(even if connecting several remote control units)



Never route sensor or communication cables near

120/240VAC line voltage wiring.



LV plug as standard delivery

Notes:



If the Vitotrol 200-A is to be used for room temperature hook-up, site the device in a main

living

 room.

Connect maximum 3 Vitotrol 200-A units to

the control unit.

Specification

Power supply Via KM-BUS

Power consumption 0.2 W

Permissible ambient temperature

Operation

Storage and transport

32 to 104°F (0 to +40°C)

-4 to 149°F (-20 to +65°C)



(continued)

Control

Specification

Power supply

Power consumption


Operation


Via KM-BUS

0.5 W

32 to 104°F (0 to +40°C)

-4 to 149°F (-20 to +65°C)

Notes:



If the Vitotrol 300-A is to be used for room

temperature hook-up, site the device in a main

 room.

If the Vitotrol 300-A cannot be installed in a suitable

location for capturing the room temperature, order

a room temperature sensor as well.



Connect no more than one Vitotrol 300-A to the

Vitotrol 300-A

KM-BUS subscriber.



Displays:

– Room temperature

– Outdoor temperature

– Operating program

– Operating condition

– Heat-up condition of the heating water buffer

tank, ash box full, recharge fuel and heat-up

(depending on boiler type).



Settings:

– Set room temperature for standard mode (normal

room temperature) and reduced mode (reduced

– Set DHW temperature

– Operating program, switching times for heating

circuits, plus further settings via plain text menu

on the display



Party and economy mode can be enabled via the menu



Integrated room temperature sensor for room

Installation location:



Weather-compensated mode:

Installation anywhere in the building.



Room temperature hook-up:

The integral room temperature sensor captures the actual room temperature and effects any necessary correction of the supply temperature.

Connection:



2-core lead 18 AWG, length max. 164 ft. (50 m)

(even if connecting several remote control units).







LV plug as standard delivery

Room temperature sensor

Separate room temperature sensor as supplement to the

Vitotrol 300A; to be used if the Vitotrol 300A cannot be installed inside the main living room or in a suitable position for temperature capture and adjustment.

Installation in the main living room on an internal wall opposite radiators.

Never install inside shelving units, in recesses, or immediately by a door or heat source (e.g. direct sun, fireplace, etc.).

Connect the room temperature sensor to the Vitotrol

300A.

Connection:



2-core lead with a cross-section of min AWG 18 (copper)



Max. lead length from the remote control: 99 ft. (30 m)





Specification

Sensor type


Operation


Viessmann NTC 10 k Ω at

77°F (25°C)

32 to 104°F (0 to +40°C)

-4 to 149°F (-20 to +65°C)

13

14

Control


(continued)

Standard delivery:



Programming unit with 5 in. (125 mm) touchscreen



Wall socket for wall mounting



Installation materials for wall mounting

Connection:

CAN BUS data cable



Type of cable: LiYCY 2 x 2 x AWG 20 (min)



Shielded cable

A data cable is needed for each additional controller module. If a data cable of more than 33 ft. (10 m) is required, this may also be provided on site by the electrician.

The total length of all CAN BUS cables must not exceed

1000 ft. (300 m).


Vitotrol 350-C

CAN BUS subscriber

Remote control and cascade controller with control unit extension (CAN BUS subscriber). Optional use as remote control or cascade controller. With 5 in. (125 mm) color touchscreen for wall mounting.

Room controller with control unit extension:



Display of all information pertinent to the boiler



Charge indicator for the heating water buffer tank



Modbus TCP

Cascade controller with control unit extension:



Cascade of up to 4 solid fuel boilers and enabling of additional boilers as peak load boilers (oil/gas boilers)



All control circuits are displayed and operated on the

boiler






Modbus TCP



(continued)

Vitotrol 350-C connection options

Boiler, Vitotrol 350-C and controller modules connected in parallel

Control

Legend

A Boiler

B Vitotrol 350-C

C Mixing valve extension module

The Vitotrol 350-C cascade controller enables:



Display of all relevant information for each boiler in the cascade



Control of up to 4 Vitoligno 300-C boilers



Control of an external heat generator

(e.g. oil/gas boiler) via the lead boiler



Control of the boilers according to priority




Legend

A Vitotrol 350-C

B Vitoligno 300-C boiler (lead boiler)

C Peak load boiler (e.g. oil/gas boiler)

D Vitoligno 300-C boiler (lag)

E Vitoligno 300-C boiler (lag)

15

Control


(continued)


Heating circuit

Weather-compensated heating circuit control unit with digital time switch for setback mode according to individual day and seven-day program, with pump control unit, frost protection function, eco mode and limited supply temperature.

16

Legend

A Strap-on temperature sensor (PT 1000)

B Pump

C Mixing valve

Tank heating with flow control

If the temperature at the tank temperature sensor falls below the set value, the circulation pump for tank heating starts and the DHW tank is heated.

The flow rate of the heating water is controlled via the return temperature (flow control). This results in optimum stratification of the buffer tank with sustained high temperature at the tank flow. The heating periods

(individual day and seven-day program) can be adjusted via the integrated time switch.



PT1000 immersion temperature sensor with connecting

lead Ø a in., 78 in. (Ø 6 mm, 2 m long)



Strap-on temperature sensor PT1000

Note: The standard delivery does not include items

A and B .

Legend

A Pump

B Control valve

C Strap-on temperature sensor (PT1000)

D Immersion temperature sensor (PT1000)



(continued)

Control

Sensors for use with Ecotronic control

Buffer tank temperature sensor set



3 buffer temperature sensors for operation with a heating water buffer tank.



With R½ x 11 in. (280 mm) sensor wells.



With connecting lead, for capturing temperatures in the heating water buffer tank.



5 buffer temperature sensors for operation with a heating water buffer tank.



With R½ x 11 in. (280 mm) sensor wells.



With connecting lead, for capturing temperatures in the heating water buffer tank.

On-site extension of the connecting lead:



2-core lead, length up to 198 ft. (60 m) of AWG 18

(copper) minimum.





Specification

Lead length

Sensor type

198 in. (5 m), fully wired

Viessmann PT1000


Operation


32 to 194°F (0 to +90°C)

-4 to 158°F (-20 to +70°C)

Solar collector temperature sensor

Immersion temperature sensor as collector temperature sensor with connecting lead for installation in the solar collector.





 minimum.



Specification

Lead length

Sensor type


Viessmann PT1000


Operation


-4 to 356°F (0 to +90°C)

-4 to 158°F (-20 to +70°C)

17

18

Control


(continued)


Sensors for use with Ecotronic control (continued)

DHW tank temperature sensor (supplied)

Immersion temperature sensor as DHW tank temperature sensor with connecting lead.

In systems with DHW tanks from Viessmann, the tank temperature sensor is installed directly into the sensor well of the threaded elbow in the heating water solar return.





 minimum.



Specification

Lead length

Sensor type


Viessmann PT1000


Operation


32 to 194°F (0 to +90°C)

-4 to 158°F (-20 to +70°C)

Strap on temperature sensor

Specification

Lead length

Sensor type


Viessmann PT1000


Operation 23 to 122°F

(–5 to +50°C) to

Storage and transport 23 to 158°F

(–13 to +70°C) to



(continued)

Control

Mixing valve extension module

Three heating circuits with mixing valve, two heating circuits with mixing valve plus DHW heating or one heating circuit with mixing valve, one DHW heating and one solar circuit can be connected to the Ecotronic.

An additional, fourth heating circuit with mixing valve can be connected via the KMBUS.

Note: List of different connection options to the HKK PCB

of the Ecotronic and KM-BUS: See chapter

“Ecotronic control unit, overview of connection

options” (refer to page 11).

Mixing Valve Extension Module

Rated voltage

Rated frequency

Rated current

Power consumption

Max. ambient temp.

O peration:

120VAC

60 Hz

2A

4 W

32 to 104ºF (0 to 40ºC)

Storing or transporting:

Relay output for heating circuit pump:

Actuator torque:

Required runtime of the mixing valve motor for

90° ∢

-4 to+149ºF (-20 to+65ºC)

2 A, 120VAC

2.2 ft.lb (3 Nm)

120 sec.

Mixing valve motor kit

The mixing valve actuator is mounted directly on the

Viessmann ¾ to 2½” mixing valve.

The mixing valve actuator is a motor-driven control unit.

The rotational direction is reversible.

Specification

Rated voltage

Rated frequency

Power consumption

120VAC

60 Hz

4 W max.


Operation 32°F to 104°F (0º C to 40°C)

Storage and transport -4°F to 149°F (-20°C to 65°C)

19

20

Control


(continued)


Sensors for use with mixing valve extension module

Supply temperature sensor

Strap-on (included with mixing valve motor kit, see page 18)

Specification

Lead length 19 ft. (5.8 m), fully wired

Sensor type Viessmann NTC 10 k Ω at 77°F (25°C)


Operation


32 to 248°F (0 to +120°C)

-4 to 158°F (–20 to +70°C)

Immersion temperature sensor

To capture a temperature in a sensor well.

Specification


Sensor type Viessmann NTC 10 k Ω at 77°F

(25°C)


Operation


32 to 194°F (0 to +90°C)

-4 to 158°F (-20 to +70°C)

KM BUS distributor

For the connection of 2 to 9 devices to the control unit

KM BUS.

Specification



Operation


32°F to 104°F (0º C to 40°C)

-4°F to 149°F (-20°C to 65°C)


Accessories for Pellet Storage Room and Pellet Supply

Accessories

Pellet supply hose and return air hose

Only for pellet supply via vacuum system.

Only required if the length of 49 ft. (15 m) supplied with the room discharge system is insufficient or if the fuel is stored in a pellet silo.

7

2 in. (

7

50 mm), roll with 49 ft. (15 m).

With 6 broad clips.

Observe the maximum hose length of 99 ft. (30 m).

The pellet supply hose must be made from a single piece max. 49 ft. (15 m).

Broad clip

2 pieces,

7

2 in. (

7

50 mm)



For pellet supply hose and return air hose.



As adaptor at the pellet hopper, suction turbine, pellet silo or room discharge screw conveyor.

Fire protection collar

Only for pellet supply via vacuum system.

2 pieces

7

2 in. (

7

50 mm).



For pellet supply hose and return air hose.



For routing through an additional room.

Z bracket

2 pieces, 40 in. (1 m) long.

For storage room door or access hatches.

Pellet deflector shield

40 in. x 48 in. (1.0 x 1.2 m) long, plastic.

Flexible screw conveyor

118 in. (3 m) long.

157 in. (4 m) long.

For pellet supply from a pellet silo to the boiler.



Flexible screw conveyor (hose with screw conveyor),

can be trimmed.



2 hose clips.

21

22

Design

Additional Information

Water quality

Treatment for boiler feed water should be considered in areas with known problems, such as where a high mineral content and hardness exist. In areas where freezing might occur, it recommended that an antifreeze be added to the system water for protection against freezing. Please adhere to the specifications given by the antifreeze manufacturer. Do not use automotive silicatebased antifreeze. Please observe that an antifreeze/water mixture may require a back flow preventer within the automatic water feed and influence components such as diaphragm expansion tanks, radiation, etc. A 40% antifreeze content will provide freeze-up protection to

-10°F (-23°C). Do not exceed 50% antifreeze mix ratio and do not use antifreeze other than specifically made for hot water heating systems.

Total output (MBH) Total Hardness (ppm as ca CO

3

)

> 1 Total  680  200

> 680 to  255  150

The pH value of the heating water should be between 8.2 and 9.5


Oxygen diffusion barrier under floor tubing

The boiler warranty does not cover pressure vessel failure resulting from corrosion caused by the use of underfloor plastic tubing without an oxygen diffusion barrier.

Such systems without oxygen diffusion barrier must have the tubing separated from the boiler with a heat exchanger. Viessmann always recommends the use of underfloor plastic tubing with an oxygen diffusion barrier.

Boiler start-up

Vitoligno 300-C boilers does not require start-up by

Viessmann.

Sound attenuation

Please consult a professional engineer who is specialized in noise attenuation for advice.

The burner/boiler systems, circulation pumps and other auxiliary equipment used in heating systems generate noise.

This noise is transferred from the boiler room via floorboards, ceiling and walls to neighboring rooms and via the flue gas system as well as the ventilation air and exhaust air apertures into other rooms and into the open, where they may cause a nuisance.

To avoid this from happening, additional protective measures may be required which should be considered at the design stage.

Subsequent measures to reduce noise nuisance frequently require extensive effort and expenditure.

Frost protection

An antifreeze additive suitable for heating systems can be added to the fill water. The antifreeze manufacturer must verify its suitability, since otherwise damage to gaskets and diaphragms can occur as well as noise during heating operation. Viessmann accepts no liability for any resulting damage or consequential losses.


Venting Information

Design

Boiler vent connection

It is the responsibility of the vent manufacturer to provide the boiler vent adaptor. Dimensions of the flue outlet of the boiler are shown in the illustration and in the chart below.

Flue outlet dimensions a in. (mm) b in. (mm) c in. (mm) d in. (mm) e degrees

5.8 (147.1)

6.0 (153.4)

1.9 (47.1)

3.6 (92.5)

4.0

Connection on the flue gas side

Chimney

A chimney compliant with regulations relevant to the rated boiler heating output is required for efficient boiler operation. In Canada refer to CSA B365 (latest edition).

In the US refer to NFPA-211 (latest edition).

Note that in the lower output range of the boiler, flue gas temperatures below 194°F (90°C) may be generated.

Therefore connect the boiler to a moisture-resistant chimney.

If the boiler is to be connected to a chimney that is not moisture resistant, carry out a chimney calculation or request a chimney assessment.

Single acting barometric draft regulator

* The barometric draft regulator must be the same diameter

opening as the chimney for which the vent is sized.

For example, a 6 in. (150 mm) chimney would require a

6 in. (150 mm) barometric draft regulator. Do not size the barometric draft regulator to the breeching outlet of the boiler, unless the chimney is also intended to be of that diameter.

For room sealed operation and a draught > 0.02 “w.c.

(> 0.15 mbar), a barometric draft regulator approved for room sealed operation must be used.

Vitoligno 300-C, barometric draft regulator in the chimney.

IMPORTANT

* The flue size outlet on the boiler does not automatically determine the horizontal breeching, or the actual chimney diameter.

The chimney size must be designed for the actual boiler model and its respective input.

23

24

Design

Venting Information

(continued)


Flue gas connection



Install the flue pipe rising to the chimney (with 45º



 possible).

Never push the flue pipe too far into the chimney.

Ensure the full flue gas path (incl. cleaning port)

 gas-tight.

Never insert the flue pipe into the brickwork of the chimney. Instead, connect using a flexible flue pipe adaptor. Provide a cleaning port.



Acoustic transmission may arise from the flue gas

fan, which can lead to excessive noise. We recommend making the connection to the chimney with a flexible flue pipe adaptor.



Max. flue pipe length: 118 in. (3 m)



Provide the flue pipe with thermal insulation of at least

1 a in. (30 mm) thickness.



The use of a boiler flue connection with condensate trap is recommended because of the low flue gas temperatures in partial load operation.

The installation of this unit shall be in accordance with local codes. In the absence of local codes use:

- In Canada, CSA B365 installation code for solid fuel

burning appliances and equipment (latest edition).

- In USA, NFPA-211 standards for chimneys fire places,

vents and/or solid fuel burning appliances (latest edition).

Legend

A Boiler flue connection with condensate trap (for

B

H

K

Diagram of boiler with wall clearance

Flexible flue pipe inlet

C – F Possible installation location for the barometric

damper

G Flue pipe cross-section

Chimney cross-section

Thermal insulation

Explanation of possible installation locations:

C Very good control, venting effect limited by long flue pipe or small cross-section ratio flue: chimney; select this installation location only in extreme circumstances.

D Very good venting effect, good control; select this installation location only in extreme

circumstances.

E Very good venting effect, good control; retrofit only in case of masonry chimneys. In case of multi layered construction, installation only by qualified contractor; installation location E is

preferred .

F Limited control and venting. Due to the low soot levels, we recommend this installation for solid fuel boilers and lined chimneys.

Venting requirements

This boiler needs fresh air for safe operation and must be installed so there are provisions for adequate combustion and ventilation air. Inadequate supply of combustion air can cause poisonous flue gases to enter living space which can cause severe personal injury or loss of life.

This boiler must be properly vented. Use a vent material certified for use with solid-fuel fired equipment.

This boiler’s venting system must be listed to ULC S-629

(Canada) or UL 103HT (USA) – Standard for Solid and liquid Fuel Chimneys. Use current revision of codes.

This boiler shall be connected to: a) a masonry chimney conforming to local regulations or,

in the absence of such regulations, to the requirements

of the National Building Code

or...

b) a certified factory-built chimney.

A flue pipe serving this boiler shall be constructed of steel or other suitable material with a melting point of not less than 2000°F (1100°C). Galvanized steel shall not be used.


Buffer Information

Design

Engineering information for systems with heating water buffer tank

Benefits for systems with heating water buffer tank.

Using a heating water buffer tank provides substantial benefits for the operation of a wood pellet boiler. As the boiler supplies heat to the heating circuits and the heating water buffer tank, the minimum boiler runtime of 30 minutes required for clean combustion is reached. After the boiler shuts down, any heat demand in the heating circuits will first be met from the heating water buffer tank before the boiler starts again. For system examples, refer to the Installation and Service Instructions.

Insufficient runtimes of the boiler can cause the following problems:



Formation of tar due to boiler temperatures being too low.



Impaired or prevented function of the lambda probe, the combustion grate and other boiler components due to contamination and condensate.



Increased power consumption due to multiple ignitions.



Reduced service life of the boiler due to frequent starts and stops. Under the following conditions, the wood pellet boiler must never be operated without a heating water buffer tank:

- When individual room control is installed.

- When the heat demand is significantly lower

than the rated boiler heating output. In these

buildings, a large proportion of the operating time

is under the lowest modulation level of the boiler.

- When the heating system is run with very small

heating loads in spring/autumn or e.g. only the

bathroom is heated.

- When an unusually high DHW demand or high DHW

peaks have to be met (e.g. hotels, large multi

occupancy blocks, showers in sports centres).

A wood pellet boiler requires 30 minutes to reach its

maximum heat output from standby. This period has

to be bridged with a heating water buffer tank.

- When air heating systems or even only individual

heater fans are started without lead time for the

boiler.

- When a solar thermal system is incorporated

into a low temperature heating system.

- When it is not possible to guarantee the minimum

runtime of 30 minutes in all operating situations.

Design/engineering information

The sizing of the heating water buffer tank determines the convenience provided by the pellet heating system.

The heating water buffer tank ensures rapid heating in the morning and adequate heat transfer under all operating conditions and extends the boiler standstill periods. As long as funding, standards and laws do not require a larger capacity heating water buffer tank, the following values can be used for sizing:

Vitoligno 300-C (model 32): 2.3 USG/MBH (30 L/kW) rated heating output.

Examples:

109.2 MBH x 2.3 USG/MBH = 253.3 USG

(32 kW x 30 L/kW = 960 L)

(minimum buffer tank volume)

25

Design

Pellet Storage and Pellet Supply Information


Information regarding the bulk delivery of pellets by truck

26

Legend

A Return air connector

B Fill connector

C Pellet storage room

Pellets are delivered by pellet delivery truck when bought in bulk. The size of the delivery tanker must be taken into consideration when planning access.

Access could therefore be affected by weight and/or height restrictions, narrow or steep access routes, tight bends or a lack of turning space.

Pellet storage rooms should, where possible, be located alongside an external wall to leave the fill hoses as short as possible. Because of fluctuating air volumes, handling with fill hoses in excess of 99 ft. (30 m) becomes difficult.

Contact your pellet supplier for access to delivery requirements.



(continued)

Design

Fuel consumption and storage room design

Building heat load

MBH (kW)

10.2 (3)

17.0 (5)

23.7 (8)

34.1 (10)

41.0 (12)

51.2 (15)

68.2 (20)

* Annual consumption

US ton

(metric ton)

1.3 (1.2)

2.2 (2.0)

3.5 (3.2)

4.3 (3.9)

5.2 (4.7)

6.5 (5.9)

8.6 (7.8)

85.3 (25) 10.8 (9.8)

119.4 (35) 15.1 (13.7)

153.5 (45) 19.4 (17.6)

170.6 (50) 21.5 (19.5)

204.7 (60) 25.9 (23.5)

238.9 (70) 30.3 (27.5)

273.0 (80) 34.2 (31)

307.0 (90) 38.6 (35)

341.2 (100) 43.0 (39)

Volume for annual demand cu ft. (m³)

Storage room without a sloping floor cu ft. (m³)

63.6 (1.8)

106.0 (3.0)

169.5 (4.8)

212.0 (6.0)

254.2 (7.2)

317.8 (9.0)

423.8 (12)

529.7 (15)

741.6 (21)

953.5 (27)

1059.4 (30)

1271.3 (36)

1483.2 (42)

1695.1 (48)

1907.0 (54)

2118.9 (60)

* Fuel consumption will vary depending on climate and

length of the heating season.

Fuel storage in the pellet storage room

Sizing the pellet storage room

The storage room should ideally be rectangular and large enough to accommodate a year’s supply of fuel. This reduces the number of deliveries.

The size of the storage room depends on the heat load of the building which in turn is subject to the building’s heat demand. The floor area should not be less than 7 x 10 ft.

(2 x 3 m).

Calculating the annual pellet demand

The volume of the annual pellet demand subject to the building heat load can be calculated with the following rule of thumb:

Volume for annual demand = building heat load in

MBH x 6.2 ft 3 /MBH (kW x factor 0.6 m 3 /kW)

1. For storage rooms without sloping floor, the volume

for the annual demand corresponds to the volume of

the storage room:

Storage room volume without sloping floor volume =

volume for annual demand

2. For storage rooms with sloping floors, the unused

space has to be taken into account, to ensure the

volume is sufficient for the annual demand.

The sloping floor causes approximately 1/3 of the

volume to be lost:

Storage room volume with sloping floor = 1.5 x

volume for annual demand

Conversion of storage room volume to pellet quantity:

Pellet quantity in lb = storage room volume in ft 3 x 40.6 lb/ft 3

(Pellet quantity in t = storage room volume in m 3 x 0.65 t/m 3 )

Sample calculation for pellet storage room with sloping floor

Heat load of the building: 41 MBH (12 kW)



Calculation of volume for annual demand:

41 MBH x 6.2 ft 3 /MBH = 254.2 cu ft.

(12 kW x 0.6 (m 3 /kW) = 7.2 m 3 )



Calculation of annual pellet demand:

254.2 x 40.6 lb/ft 3 = 10320.5 lb

(7.2 x 0.65 t/m 3 = 4.7 metric tons)



Calculation of storage room volume with sloping floor:

1.5 x 254.2 cu ft = 381.3 cu ft.

(1.5 x 7.2 m 3 = 10.8 m 3 )



Calculation of floor area of storage room with a room height of 7.6 ft. (2.3 m):

381.3 cu ft/7.6 ft = 50.2 ft 2 (10.8 m 3 /2.3 m = 4.7 m 2 )

A minimum floor area of 7 x 10 ft (2 x 3 m) is adequate to store a year’s supply of fuel.



Calculation of stored energy:

Annual pellet demand in kg x net calorific value of the pellets in 10320.5 lb x 7.1 MBH/lb = 73275 MBH

(kWh/kg 4700 kg x 4.6 kWh/kg = 21,620 kWh)

Legend

A Fill connector

B Return air connector

C Clear space

D Sloping floor

E Empty space

F Viessmann discharge system

G Available volume = h of the room

27

28

Design


(continued)


Wood pellet storage must be installed observing local regulations in addition to National Codes (in the absent of such codes use CSA B365 Installation Code for Solid Fuel

Appliances and Burner Equipment.

The General requirements of the pellet storage room and required system components are…



When storage facilities for wood are required, the wood

should be kept at least 1.5 m (5 ft) from then heating

appliance.



The space around the wood-burning appliance should

be kept clean and free of litter and wood residues.

Requirement for storing particulate fuels (including wood pellets);



Storage facilities for particulate fuels inside buildings,

other than those that form an integral part of the should

(a) effectively isolate any insects, vapors, and airborne

contaminants associated with the fuel from contact

with, and transmission to, other parts of the building;

(b) be partitioned from the remainder of the building by

a 0.5 h fire separation;

(c) be constructed of materials that provide sufficient

structural strength and are resistant to decay;

(d) not be located over a sewer or drain opening or at

the low point of the floor;

(e) have a smoke detector or smoke alarm located at

ceiling level within 3 m (10 ft) of the opening of the

storage

(f) be provided with a means of removing moisture,

limiting excess temperatures, and venting air to the and

(g) be located such that no access opening is closer

than 1.5 m (5 ft) to the appliance.



Electrical devices such as switches and motors should

be located outside the storage facility, and electric

wiring and lighting required in the storage facility should

be suitable for Class 2, Division 2, Group F locations,

as specified in the Canadian Electrical Code, Part I.



Openings for access should be provided with doors that

(a) are gasketed; and

(b) have a secure, child-proof mechanism.



Every pipe or duct intended to operate at temperatures

greater than or equal to 195°F (90°C) should be located

such that fuel cannot be stored in contact with it.



Where fuel is to be drawn automatically from the

storage facility by conveyors or screw augers, means

should be provided to prevent burnback in the fuel

supply

 train.

Where fuel is to be pneumatically forced into the

storage facility, provision should be made to

(a) prevent the pressurization of the storage facility;

(b) provide an electric ground connection for the fuel

supply chute or hose to prevent the buildup of a

static electrical charge; and

(c) provide for dust control during the loading process.



A suitable fire extinguisher should be provided and be

Fire separation must be built in accordance with;



For Canada) NBCC (National Building Code of Canada)

most recent edition, as well as any other province,

territory, local codes and/or regulations



For USA) IBC (International Building Code) most recent

edition, as well as any other state, local codes and/or

regulations.

Information regarding the pellet storage room

The pellet storage room must be designed to allow easy cleaning. To ensure a permanent interruption free fuel supply to the boiler, the fuel store must be cleaned regularly. This includes carefully removing fines in the fuel store. After two to three deliveries, the fuel store should be cleaned prior to the next pellet delivery. Over time, pellet dust accumulates in the lower part of the fuel store and can cause faults in the fuel supply.

Wood pellets of inferior quality with an increased percentage of fines cause increased accumulations of dust in the storage room. However, fines are also produced by the mechanical stresses that wood pellets are subjected to during transport and injection (injection pressure, installations, etc.) into the storage room. pellets certified to CANPlus Grade A1 or PFI (Standard or Premium Grade) ensures proper pellet quality, through strict wood pellet requirements.

This involves monitoring the entire value chain from production to delivery. Manufacturers and suppliers of high quality wood pellets can be found at www.pelletfuel.

org,www.pellet.org.



(continued)

Legend

A Protective boards at the entrance to the storage room

B Discharge area, screw conveyor system

C Deflector

D Discharge to flexible screw conveyor or to vacuum

system

E Min./max. length of discharge area

F Max. storage room length

G Return air connector

H Fill connector

K Slanted panel for balancing storage room length / extraction area length

Design

Wood pellet storage

Guidelines regarding wood pellet storage;



The pellet storage room must be dry, as pellets will

swell up markedly if exposed to moisture. This leads to

substantial difficulties in supplying pellets to the boiler.



The pellet storage room must be of solid, dust-tight

construction, as loading pellets into the room creates

dust and the pellets will exert high pressure on the walls.



The pellet storage room or the installation room for

prefabricated stores must be vented. Vents should not

be positioned directly below windows or supply air

apertures. Vents should be closed during filling, so that

the vacuum fan can create a slight negative pressure in

the storage room.



Doors or access hatches into the pellet storage room

must open outwards and must be dust-tight (with an gasket).



Fit protective boards on the inside of the door opening,

so that pellets do not press against the door.



There should be no electrical installations inside the

pellet storage room. Essential electrical installations

must be of explosion-proof type, in accordance with



Avoid the installation of water pipes inside the storage

room because of condensation and the risk of burst

pipes.



Pellet storage rooms should be equipped with a fill

connector and a return air connector G (see page

31) with a Storz coupling, type A, Ø 4 in. (Ø 100 mm)

(fire hose connector), with extension pipes leading into

the pellet storage room. Pipes should be metal,

connected to the brickwork and grounded.



Fit a deflector C opposite the fill connector to protect

the pellets and the brickwork.



The pellet storage room must be free from foreign

bodies (small stones, wood particles, etc.).



The supply hoses and return air hoses for the vacuum

system must be grounded, must not be routed outside

and should be protected against temperatures in excess

of 140°F (60°C).



The wall outlet for the room discharge should be sealed

from the storage room side with fireproof material (e.g.

plastered).



The pellet storage room must be inaccessible to

children. The wood pellet boiler should be shut down

approximately one hour before the storage room is

filled. The storage room should be sufficiently vented

before anyone enters.

29

30

Design


(continued)


Room discharge with screw conveyor system

The screw conveyor system may be up to 252 in. (6.4 m) long. The available depth of the storage room can be extended to up to 272 in. (6.9 m) by installing a third sloping floor between the screw conveyor terminal module and the storage room wall.

Legend

A Sloping floor

B Discharge screw conveyor

C Mounting panel



(continued)

Connector spacing ≥ 19 f in. ( ≥ 500) mm

Legend

A Fill connector


Connector spacing <19 f in. (<500)

Legend

A Fill connector


Design

Fill connector and return air connector

Arrange the connectors so that no overpressure can develop in the pellet storage room during the filling process.

Keep the return air connector unrestricted, even when the maximum filling level in the storage room has been reached

(see page 27). The connectors should be located as high as possible inside the pellet storage room to enable it to be filled to the maximum.

The fill connectors should be at least 8 in. (20 cm) below the ceiling to prevent pellets hitting the ceiling

(fit protective boards if the ceiling is plastered). Choose a position for the connectors on the narrow side of the storage room. Pellets are blown approx. 158 in. to 196 in.

(4 m to 5 m) with straight fill connectors.

Where a 90° bend fitting is located before the entry into the storage room, fit a straight pipe of at least 40 in. (1 m) length on the other side to protrude into the storage room.

This enables the pellets to reach the required filling velocity and therefore the required fill width.

Grounding

Ground all connectors to prevent static electricity building up during the filling process. Generally the connection of each pipe element to the equipotential bonding of the building is recommended. At the very least, connect each pipe element securely to the brickwork, either by setting the pipe into the brickwork (without thermal insulation) or by means of pipe clips set into the brickwork.

Connector length and location

The length of the fill connector depends on the distance to the return air connector. Connector spacing of <20 in.

(< 500 mm) may occur if both connectors are set into a cellar window.

If connectors are to be located on the long side of the storage room, we recommend alternating the filling between both connectors, which ensures more efficient filling of the storage room. In any case, both connectors must be grounded. Install a deflector opposite both connectors.

Alternating filling

Legend

A Deflector

B Fill and return air connectors

31

Design


(continued)


Internal pellet storage room

If the fill and return air connectors are to be routed through an adjacent room, clad them with a material compliant with 1.5 hr fire separation (rock wool or similar). Ground each extension pipe using pipe clips.

Plastic pipes should not be used as extension pipes.

Legend

A Connector

B Fire-resistant cladding

C Extension pipe

D Pipe clip

Connector installation options

Setting into brickwork

The connector is set into the outlet with mortar without thermal insulation.

32

Legend

A Fill connector

B Wall outlet Ø 6 in. (Ø 150 mm) (on-site) for

fill

Wall installation with screws

The connector is secured to the outside wall with screws and grounded with a pipe clip.

Legend

A Fill connector

B Screws

C Pipe clip for grounding

D Wall outlet Ø 4 in. (Ø 110 mm) (on-site) for



(continued)

Design

Window installation with screws

A plate is set into the window opening. The connector is fitted through the plate, secured with screws and grounded with a pipe clip.

Legend

A Fill connector

B Screws

C Pipe clip for grounding

D Outlet Ø 4 in. (Ø 110 mm) (on-site) for

fill A

E Window opening

Installation in the light well

Wall installation and installation in the window opening are both possible.

The reduced fill and return air connectors are each pushed into a 45º bend, which in turn is located in an extension pipe pushed through the wall or the window opening.

Legend

A Fill connector

B Pipe clip for grounding

C Extension pipe

D Wall outlet Ø 4 in. (Ø 110 mm) (on-site)

or

Outlet

E 45 º bend

4

Storing fuel in a pellet silo

Benefits:



Flexible installation location



Quick, easy installation



Completely dustproof



Discharge system freely accessible for maintenance work



Fuel extraction via suction system or flexible auger

Sizing the pellet silo

Where possible, size the pellet silo so that enough pellets can be stored to cover the annual fuel demand.

Note: formula sizing can be found on page 28.

Pellet silo (adjustable height)

As textile/metal combination, delivered in parts.

Standard delivery:



Powder coated steel frame



Horizontal filler neck



Pellet silo made from UV protected fabric



Installation material



Filling system with retainer, Storz-A couplings, caps clamps

Discharge unit to be ordered separately (starting on page 34).

33

Design


(continued)


34

Pellet silos

Mode

2.2

3.1

3.9

5.9

7.3

Dimensions a in. (mm) b in. (mm)

65 (1650)

77 (1950)

88 (2230)

100 (2540)

119 (3010)

Max. tonnage (at bulk density)

Mode

85 (2150)

85 (2150)

85 (2150)

99 (2500)

99 (2500)

Assembled height (steel frame)

in. (mm)

Ceiling height

65 (1650)

65 (1650)

65 (1650)

79 (2000)

79 (2000)

Room height min. 77 in. (1.8 m)



2.2 ton (metric ton)

1.9 (1.7)

2.5 (2.2)

--

3.1

ton (metric ton)

2.5 (2.3)

3.4 (3.1)

--

3.9

ton (metric ton)

3.2 (2.9)

4.3 (3.9)

--

5.9

ton (metric ton)

--

5.1 (4.6)

6.5 (5.9)

in. (mm)

77-85 (1800-2150)

77-85 (1800-2150)

85-99 (2150-2500)

85-99 (2150-2500)

85-99 (2150-2500)

7.3

ton (metric ton)

--

5.8 (5.3)

8.0 (7.3)

Legend

A

B

C

E

F

G

Return air connector

Fill connector

Deflector

D Vitoligno 300-C

Connection unit, flexible screw conveyor

Flexible screw conveyor

Discharge screw conveyor

On-site requirements of the installation room

For storage room requirements, see page 26. The pellet silo can be installed in any suitable load bearing room such as a basement. The variable container height enables an optimum utilisation of the available space. For installation purposes, the installation room needs to be 4 in. (100 mm) wider than the pellet silo. There must be no pointed or sharp objects inside the installation room, otherwise the fabric of the pellet silo can be damaged. The fabric must not come into contact with damp walls, must not rub against walls or be exposed to direct sunlight.

Installation outdoors requires a weather-proof enclosure.

The load-bearing capacity of the substrate must be assured in accordance with the details in the following diagrams.

Particularly with “floating” concrete (unfinished concrete

+ insulation layer + slab), there is a risk that they may not meet the specified requirements. Secure the pellet silo to its support surface.

Pellet supply from the pellet storage room to the boiler pellet supply via flexible screw conveyor — room discharge with screw conveyor system.

If the pellet storage room is located very close to the boiler installation room. The pellets can be conveyed directly to the rotary lock valve via a flexible screw conveyor. A pellet hopper at the boiler is then not required.



(continued)

Design

Depth 71 in. (1.8 m) A

Depth 90 b in. (2.3 m) B

Depth 114 a ft. (2.9 m) C

Depth 134 in. (3.4 m) D

Complete system for room discharge with screw conveyor system:



Flexible screw conveyor, 118 or 157 in. (3 or 4 m)

long.



Screw conveyor system for different room depths

and connection to a flexible screw conveyor.

Comprising:

– 1 wall module screw conveyor system 25 a in. (0.64 m) long 1

– 1 screw conveyor terminal module 44 in. (1.14 m) long 4

– 3 mounting brackets 5

– 1 flexible screw conveyor 6

Comprising:


– 1 screw conveyor module 19 f in. (0.5 m) long 2




Comprising:


– 1 screw conveyor module 44 in. (1.14 m) long 3




Comprising:







35

Design


(continued)


Depth 161 b in. (4.1 m)

Depth 205 in. (5.2 m)

Depth 252 in. (6.4 m)

(max. room depth)

F

G

E Comprising:






Comprising:






Comprising:






Note: Clearance for installation (depth) at least 4 in.

(100) mm between the screw conveyor system and the wall.

Wall duct for screw conveyor discharge from the pellet store

36

Legend

A Pellet sensor

B Room discharge adaptor, part of the standard delivery of Vitoligno 300-C for flexible screw

conveyor



(continued)

Legend


B Fill connector

C Deflector

D Pressure hose

E Vacuum hose

F Vitoligno 300-C with pellet hopper

G Discharge screw conveyor

Design

Pellet supply via vacuum system / room discharge with screw conveyor system

Can be used if the pellet storage room is not immediately adjacent to the installation room. Pellets can be transported up to a distance of 49 ft. (15 m) and to a height differential of 197 in. (5 m). The flexible positioning of the vacuum supply system enables installations even in tight spaces.



To determine the required hose length, calculate

the distance between the pellet hopper connector

and the pellet discharge point from the pellet

storage room or the pellet silo.



Use the shortest path from the storage room to the

boiler. Route hoses so that they cannot be stepped on.



Never kink the hoses; the smallest bending radius

should be 12 in. (300 mm).



Hoses should be routed as straight and level as

possible. If hoses are routed up and down several

times, some pellets will not be transported from the

lower lying areas.



Hoses must be grounded to prevent static electricity

building up during pellet handling.



The pellet supply hose should be made from one

piece, whilst the return air hose can be made up of

several pieces. The connection piece should be made

of metal to ensure continuous grounding.



Never expose the hoses to temperatures above 140ºF

(60ºC), i.e. never route them near heating pipes or flue

pipes that are not thermally insulated.



Never route outdoors (risk of becoming brittle due to

Complete system for room discharge with vacuum system:



Pellet supply hose and return air hose 7 2 in. (50 mm),

Max. supply hose length: 49 ft. (15 m)

Max. length supply hose plus return air hose: 99 ft. (30 m)

The supply hose must be made from a single piece.



Screw conveyor system for different room depths and

connection to a vacuum system.

37

Design


(continued)


Depth 71 in. (1.8 m)

Depth 90 b

Depth 114

Depth 161

in. (2.3 m) a b

B

in. (2.9 m)

Depth 134 in. (3.4 m) D

in. (4.1 m)

Depth 205 in. (5.2 m)

Depth 252 in. (6.4 m)

(max. room depth)

A

F

G

C

E

Comprising:

– 1 pellet supply and return air hose 50 ft. (15 m) long 1

– 1 wall module vacuum system 25 a in. (0.64 m) long 2


Comprising:





Comprising:





Comprising:






Comprising:





Comprising:





Comprising:





Wall duct for screw conveyor discharge from the pellet store

Note: Clearance for installation (depth) at least 4 in.

(100 mm) between the screw conveyor system and the wall.

38

Legend

A Pellet sensor

B Pellet hose connector



(continued)

Design

Pellet supply from the pellet silo to the boiler :

Pellet supply by flexible screw conveyor (screw conveyor

+ pellet silo)

If the pellet silo is located very close to the boiler installation room.

The pellets can be charged directly to the rotary lock valve via a flexible screw conveyor.

A pellet hopper at the boiler is then not required.

Legend


B Fill connector

C Pellet silo

D Flexible screw conveyor with connection to the pellet silo

E Connection unit, flexible screw conveyor

F Vitoligno 300-C

Pellet supply by vacuum system

(vacuum system + pellet silo)

Can be used if the pellet silo is not immediately adjacent to the installation room. Pellets can be transported up to a distance of 49 ft. (15 m) and to a height differential of

197 in. (5 m).

Legend

A Pellet silo


C Fill connector

D Pressure hose

E Vacuum hose

E Vitoligno 300-C

G Vacuum hose

H Pressure hose

39

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Viessmann Main Boiler Documentation Vitoligno 300-C Manual

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VITOLIGNO 300-C

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