Piazzetta P957 Instructions For Installation, Use And Maintenance Manual

Marca: Piazzetta

Modello: P957

Categoria: Stufa a pellet

Tipo: Instructions For Installation, Use And Maintenance Manual

INSTRUCTIONS FOR

INSTALLATION, USE AND

MAINTENANCE

Pellet Stove

P957

English

Dear client,

We thank you for choosing one of our products, the result of technological expertise and continued research in pursuit of a superior

product in terms of safety, reliability and features.

In this manual you will find all the information and useful advice necessary to get the most out of your appliance in total safety.

DT2010001-00

IMPORTANT INFORMATION

DT2010208-06

REFERENCE STANDARDS

DT2010209-04

The assembly of the cover should be undertaken by two people (follow the assembly instructions in the attached booklet).

Plans and diagrams are supplied as examples at the manufacturer’s discretion; in the pursuit of a policy of continuous development and innovation

the manufacturer may, without prior warning, make any modifications deemed appropriate.

This document is the property of Gruppo Piazzetta S.p.A.; it may not be divulged in part or in whole to third parties without written permission from

Gruppo Piazzetta S.p.A. Gruppo Piazzetta S.p.A. reserves all its statutory rights.

• This manual has been prepared by the manufacturer and constitutes an integral part

of the product, and must accompany it throughout its life. In the event of sale or

relocation of the product make sure this booklet accompanies it, since the

information contained in it is addressed to the purchaser and to anyone involved in

the installation, use and maintenance of the product.

• Read the instructions and the technical information contained in this manual

carefully, before proceeding with installation, use or any repairs.

• The observance of the instructions and technical information in this manual

guarantees the safety of the user and the product, a more efficient operation and an

increased lifespan.

• The product’s installation and use should conform to the manufacturer’s instructions

and to local bylaws.

• However, when carrying out any operation we recommend that you follow carefully

the instructions contained in this manual, and that you keep it at your disposal.

• Installation, electrical connection, checks, maintenance and repairs are operations

which must be carried out exclusively by qualified and authorised personal with

specialised knowledge of the product.

• Before installing the product read all instruction booklets relating to installation of the

cladding, the ventilation kit and any other accessories.

• Be very careful when moving any ceramic components.

• Check that the floor where the product is to be installed is exactly level.

• To help correct potential unevenness and irregularities a sheet of adhesive fibreglass

accompanies the product.

• Do not block the electrical socket; it should be close to the unit but accessible.

• Connect the pellet stove to the electricity supply only after it has been connected by

an expert to the flue system.

• The plug at the end of the power supply cable must be easily accessible after

installation.

• Use only regulation wood pellets (refer to section entitled “Fuel” ).

• Never use liquid fuels to light the stove or to relight the embers.

• Ensure that the area where the stove is installed is properly ventilated while the stove

is lit.

• In the event of technical faults the fuel supply will be interrupted. Restart the stove

only after having eliminated the cause of the fault.

• The wall where the product is to be placed should not be of wood or any other

flammable material; furthermore it is important to maintain safety distances (refer to

section entitled ‘Prevention of domestic fires’ contained in the stove’s manual for use

and maintenance).

• Do not remove the protective grille from the fuel storage tank.

• Any build-up of unused pellets in the burner left over from repeated failed ignitions

must be removed before lighting the stove.

• The operation of the stove can cause surfaces, handles, flue system and glass to

become extremely hot. Touch these parts during operation only with protective

clothing or other specialised equipment.

• Because of the build-up of heat on the glass, take care that those who are unaware

of the workings of the stove do not delay in the installation area.

• Keep children informed of safety measures to be followed when the stove is

operational and at other times.

• Creaking may be heard while the stove is in operation or cooling down. This is not to be

considered a defect, but is a consequence of thermal expansion of the component

materials.

•

The product you have purchased may different slightly from the one illustrated in this

booklet since the pictures are only given as an indication and not an exact portrayal.

In the event of difficulties or if you are unable to understand the instruction

manual contact your local Piazzetta dealer.

It is forbidden to place objects which are not heat-resistant on top of the

stove or within the prescribed minimum safety zone.

It is forbidden to open the door while the stove is in operation or to operate

the stove when the glass is broken.

EN 14785 Residential space heating appliances fired by wood pellets. Requirements and test methods

EN 832 Thermal performance of buildings - Calculation of energy use for heating - Residential buildings

UNI 10683 Heat generators fired by wood or other solid biofuels - Installation requirements

UNI 10847 Single flue systems for liquid and solid fuel generators - Maintenance and inspection - Guidelines

and procedures

UNI 7129 Gas installations for domestic use fired by mains gas supply. Design, installation and maintenance.

DIN 51731 class HP2 Fuels

ÖNORM M7135 Fuels

CEI EN 60335-1 Safety of household and similar electrical appliances.

Safety. Part 1: General requirements

CEI EN 50165÷1997 Electrical equipment of non-electric appliances for household and similar purposes – Safety

requirements

EN 1856-1 Chimneys - Requirements for metal chimneys - Part 1: System chimney products

EN 1856-2 Chimneys - Requirements for metal chimneys - Part 2: Metal liners and connecting flue pipes

EN 1443 Chimneys – General requirements

CONTENTS

DT2010187-00

English

Section Title Page Code

1.0 GENERAL RULES 4 DT2010216-04

1.1 Single flueway or chimney 5 DT2010024-02

1.2 Soot inspection 5 DT2010031-00

1.3 Chimney stack 6 DT2010025-01

1.4 Fresh air intake 7 DT2010026-00

1.5 Installation environment 7 DT2010215-02

1.6 Capacity load of the floor 8 DT2010032-00

1.7 Heating capacity 8 DT2010130-01

1.8 Minimum safety distances 9 DT2010536-02

1.9 Flueway 9 DT2010229-04

1.10 Connecting to a conventional chimney 11 DT2010230-02

1.11 Using an external flue 12 DT2010232-02

1.12 Prevention of domestic fires 12 DT2010027-02

2.0 TECHNICAL CHARACTERISTICS AND SPECIFICATIONS 13 DT2011053-00

2.1 Features 13 DT2011051-00

2.2 Technical data 13 DT2011052-00

2.3 Product identification data 14 DT2010041-05

2.4 Dimensional diagram 14 DT2031517-00

2.5 Wiring diagram 15 DT2030322-03

3.0 FUEL 16 DT2010233-03

4.0 PREPARING FOR INSTALLATION 16 DT2010074-06

5.0 INSTALLATION 17 DT2011054-00

5.1 “Multifuoco” system 17 DT2010122-03

5.2

Electrical connection and the room sensor connection

19 DT2011055-00

5.3 Installing the external thermostat 20 DT2010997-00

5.4 Installing the Y connector (optional) 20 DT2010123-02

6.0 USE 21 DT2011057-00

6.1 Loading the pellets 21 DT2010289-04

6.2 Remote control 21 DT2010220-05

6.3 Lighting for the first time 22 DT2010082-03

6.4 Startup and normal operation 22 DT2010221-05

6.5 Control panel 26 DT2010222-07

6.6 Setting the language 26 DT2010469-03

6.7 Programming 27 DT2010247-05

6.8 Timer 29 DT2010242-05

6.9 Multicomfort 34 DT2010251-03

6.10 Modifying the transmission unit 36 DT2010248-04

6.11 How the “Multifuoco” system works 36 DT2010231-03

6.12 Safety devices 37 DT2010994-00

6.13 Opening the door 40 DT2011042-00

6.14 Humidifier for stove P957 41 DT2010993-00

6.15 Disposal of ashes 41 DT2010049-04

7.0 MAINTENANCE 42 DT2010249-01

7.1 Cleaning the grate and the grate support 42 DT2010089-04

7.2 Cleaning the ash tray 42 DT2010100-03

7.3 Cleaning the firebox 42 DT2010428-02

7.4 Cleaning the smoke chamber 43 DT2010127-02

7.5 Cleaning the flue system 43 DT2010092-03

7.6 Cleaning the ceramic cladding 43 DT2010059-03

7.7 Cleaning the enamelled metal parts 43 DT2010061-03

7.8 Cleaning the glass (DAILY) 44 DT2010062-04

7.9 Replacing the window 44 DT2010093-05

7.10 Replacing the remote control battery 44 DT2010218-03

7.11 Cleaning the fans 44 DT2010095-06

7.12 When not in use 44 DT2010096-03

7.13 Extraordinary maintenance 44 DT2010097-03

8.0 TROUBLESHOOTING 45 DT2011179-00

8.1 Replacing the fuses 48 DT2010557-02

Declaration of conformity Pellet Stove P957 49 DT2010380-04

Declaration of conformity Transceiver unit Multicomfort 50 DT2010383-02

European Regulations 51 DT2010382-05

This booklet code H07021550 / DT2000319 Rev. 00 (01/2008) comprises 52 pages.

English

1.0 GENERAL RULES

DT2010216-02

DT2030321-00

Ensure that the installation of your product conforms to all the indications given below.

Fig. 1

CHIMNEY STACK

SINGLE FLUEWAY

OR CHIMNEY

CONNECTION TO FLUE

SOOT INSPECTION

APERTURE

FRESH AIR INTAKE

MINIMUM SAFETY DISTANCES

CAPACITY LOAD

OF THE FLOOR

END ELBOW WITH

INSPECTION WINDOW

English

Minimo 3,5 m

MAX 45°

Minimo 3,5 m

MAX 45°

1.1 Single flueway or chimney - Fig. 2 / 6

Every appliance must have a vertical flue pipe operating by natural

draught to discharge the combustion gases outdoors.

The flue must:

- comply with regulations in force in the place of installation of the

appliance;

- be tight to the products of combustion, waterproof, suitably insulated,

made with materials resistant to corrosion by the gases and to stress;

- be connected to just one stove, fireplace or extraction hood (Fig. 2);

- be properly sized, with constant free internal section, equal to or

greater than the diameter of the flue pipe of the stove and at least 3.5

m in length (Fig. 2);

- be mainly in a vertical position with a deflection from the axis of no

more than 45° (Fig. 2);

- be at a suitable distance from combustible or flammable materials,

ensured by an air gap or suitable insulating material;

- be of uniform internal section, preferably round. Square or

rectangular sections must have rounded corners with a radius of at

least 20mm and a maximum ratio between the sides of 1.5 (Fig. 3-4-

5). The walls must be smooth if possible and without narrowing.

Bends must be regular and without discontinuity (Fig. 6).

It is forbidden to make fixed or mobile apertures on the flue

pipe to connect appliances other than the one to which it is

already connected.

It is forbidden to pass other air ducts or service pipes inside

the flue pipe, however large it is.

If the flue pipe is an incorrect size or installed other than in

compliance with the above instructions, Gruppo Piazzetta

S.p.A. cannot be held liable for malfunctioning of the product,

damage to property or injury to persons or animals.

1.2 Soot inspection - Fig. 1

- The flue must have a chamber for collecting solid matter and any

condensate located below the connection and which may be easily

inspected by means of an airtight door. (Fig.1)

- The bends connecting to the flue must have inspection points that

allow the system to be checked, cleaned and maintained.

DT2030050-00

DT2030049-00

Fig. 3

R (min. 20)

L (≤ 1,5 x P)

Accumulo di Creosoto

DT2030189-00

Fig. 5

R (min. 20)

Accumulo di Creosoto

DT2030188-00

Fig. 4

Fig. 2

DT2030190-00

Fig. 6

3.5 M MINIMUM

Deposit of Creosote

English

1.3 Chimney stack - Fig. 7 / 11

The flue must be fitted at the top with a device called a chimney stack,

designed to aid dispersion of the products of combustion in the

atmosphere.

The chimney stack must comply with the following requirements:

it must have an internal section and shape the same as the flue;

it must have a useful outlet section of not less than twice that of the

flue;

the part of the flue that emerges from the roof or remains in contact

with the outside (e.g. in the case of an open loft), must be covered with

brick or tile elements and well insulated;

it must be built in such a way as to prevent the penetration of rain,

snow and foreign matter into the flue and to ensure that in the event of

winds from all directions and angle, discharge of the combustion

products is assured (chimney stack with down-draught cowl);

any buildings or other obstacles that are higher than the chimney stack

must not be too close to the actual stack Fig.9;

the chimney stack must be positioned in such a way as to ensure

adequate dispersion and dilution of the products of combustion and

outside the reflux area. The size and shape of this area differ according

to the angle of inclination of the roof and it is therefore necessary to

adopt the minimum heights shown in Fig.10,11;

Example: Check the slope of the roof (column

), and the anticipated

distance of the chimney stack from the axis of the ridge (column A); if

the distance is greater than “A” the height of the chimney stack may be

read in (column H); if the distance is less than “A” the chimney stack

must rise above the ridge by 0.5 metres.

6-8 m

DT2030052-00

Fig. 9

TETTO PIANO

TETTO INCLINATO

0.50 m

0.50 m oltre il colmo

altezza zona di

reflusso Z

asse colmo

distanza maggiore A

H min.

distanza

min. uguale A

maggiore 5 m

pari o minore

5 m

pari o minore

5 m

DT2030053-00

Fig. 10

TETTO PIANO

TETTO INCLINATO

0.50 m

0.50 m oltre il colmo

altezza zona di

reflusso Z

asse colmo

distanza maggiore A

H min.

distanza

min. uguale A

maggiore 5 m

pari o minore

5 m

pari o minore

5 m

Fig. 11

* B equivale al

doppio di A

DT2030051-00

Fig. 7

DT2030191-00

Fig. 8

DT2030192-00

* B it is twice

of to A

FLAT ROOF

5 m

or less

5 m

or less

over 5 m

SLOPING ROOF

distance more than A

distance

at least A

ridge axis

0.50 above the ridge

height of

reflux area Z

Pitch of the roof

Horizontal width of reflux

area from ridge axis

Minimum height of

outlet from roof

Height of reflux

area

αα

A H min Z

15° 1,85 m 1,00 m 0,50 m

30° 1,50 m 1,30 m 0,80 m

45° 1,30 m 2,00 m 1,50 m

60° 1,20 m 2,60 m 2,10 m

REFLUX AREA

English

1.4 Fresh air intake - Fig. 12 / 15

The stove/fireplace must have the necessary air available to ensure

proper combustion.

- Make sure that the room in which the stove/fireplace is to be installed

has an air intake of at least the size indicated in the paragraph

“Technical data”.

- The fresh air intake may be protected by an external grille provided it

does not reduce the minimum section of the recommended airflow

and is in a position whereby it cannot be obstructed.

The air necessary for the fire may be obtained in different ways:

- Figure 12 through an external grille direct to the room of installation;

- Figure 13 with ducting through pipes direct to the room of

installation, increasing the recommended minimum free cross

section by at least 15%;

- Figure 14 through a communicating hole from an adjacent room to

the place of installation: this system may only be used if the air flows

freely from the outside through fixed apertures;

- Figure 15 from an adjacent room to the place of installation, but only

if the air flows freely through apertures communicating with the

outside.

1.5 Installation environment

The appliance must be installed in a location which allows safe and

convenient use as well as easy maintenance. If the product being

installed requires an electrical socket, the room must also be provided

with an earthed power supply in accordance with current regulations.

Do not install a wood-burning appliance in a bedroom, bath

or shower room or in any room where another heating

system not equipped with its own air supply (fireplace, stove

etc.) has already been installed.

The room or rooms adjacent to that where the appliance is to be

installed must conform to the following requirements:

it must not be used as a car bay, a store for combustible

material, nor for any activity which carries a risk of fire;

there must be no vacuum relative to normal atmospheric

pressure as a result of the contrary draught created by a prior

installation of an open fire or of an extractor system;

do not install two stoves, a stove and a fireplace or a stove and

a wood-burning range etc. in the same location since the

draught of one device can interfere with the draught of another;

- the use of equipment adapted for cooking food with non-extractor

hoods is permissible only in rooms to be used as kitchens;

- _ equipment using gas type C is permitted (refer to regulations in

force in the place of installation);

DT2030054-00

Fig. 12

DT2030194-00

Fig. 14

DT2030195-00

Fig. 15

DT2030193-00

Fig. 13

English

equipment using gas type B is not permitted (refer to

regulations in force in the place of installation);

using the stove or fireplace simultaneously with shared

ventilation systems is not permitted, whether with or without

extractor fans. Similarly the use of other devices or equipment,

such as air-conditioning systems or other heating systems

which use fans to circulate air, is not permitted. These devices

can cause a pressure drop in the environment of installation

even if they are installed in adjacent, communicating rooms.

1.6 Capacity load of the floor

Check the load-bearing capacity of the floor, referring to the weight of the

product given in the paragraph “Technical data”.

If the floor does not have a suitable load-bearing capacity, adequate

countermeasures must be taken, for example, by using a sheet metal plate

to distribute the load.

1.7 Heating capacity

Check the heating capacity of the appliance by comparing the rated power

given in the paragraph “Technical data” with the power required by the

environment to be heated.

The energy requirement may be calculated approximately by multiplying

the square metres of area by the height of the ceiling; the result is then

multiplied by a coefficient, which depends on the degree of insulation of

the building, that is, on internal and external factors of the dwelling:

a) Internal factors: type of window and door frames, thickness of the

insulation and walls, type of building materials, presence of stairwells,

walls with extensive glazing, high ceilings, position of the rooms to be

heated in relation to other adjacent heated or unheated rooms, …

b) External factors: geographical position, average outdoor

temperature, exposure, wind speed, latitude, altitude, …

Example of approximate calculation of the energy requirement to

heat a fixed volume to 18/20° C:

The coefficient that is normally used is determined according to the real

conditions as they occur case by case.

- From 0.04 to 0.05 kW per cubic metre in a well insulated environment

- From 0.05 to 0.06 kW per cubic metre in a poorly insulated

environment.

3 rooms measuring 20m2 X (H ceiling) 2.7m = 162 m3 (volume)

In an environment with a good degree of insulation, an average value

(coefficient) of 0.045 kW may be taken

162 (volume) X 0.045 (kW) = 7.3 kW necessary (6300 kcal/h)

Conversion 1kW = 860 kcal/h

Consult a heating technician or engineer for a correct check

and calculation of the requirement of the environments to be

heated (see “Reference standards”).

Rated power being equal, products with the Multi-fire system

can evenly distribute heat throughout the rooms to be heated.

English

1.8 Minimum safety distances - Fig. 16 / 18

First of all decide the exact position for installation of the stove.

Check the minimum safe distances from heat sensitive or inflammable

materials, from load bearing and other walls and also from wooden

elements, furniture, etc.

In the case of flooring that is heat sensitive or inflammable the floor

should be protected with non-combustible insulating material, e.g.

sheets of steel plate, marble, tiles, etc.

The minimum distances are:

Connection to the flue must respect the 40cm minimum safety

distance from heat-sensitive structural components or inflammable

materials (wood panelling, beams or ceilings, etc).

Keep away from the stove any combustible product such as

wooden furniture, curtains, carpets, combustible liquids, etc.

when it is lit /working (minimum distance 80 cm).

It is advisable to leave more than the indicated 20 cm free at

the side of the stove to facilitate any maintenance on the

appliance.

1.9 Flueway - Fig. 19 - 20

The pellet stove is not the same as other stoves. It has a forced

draught of flue gas by a fan, which keeps the firebox in a

vacuum and the entire flueway slightly pressurised. For this

reason the flue must be completely airtight and correctly

installed to ensure both trouble-free operation and user safety.

- The flueway must be made by specialised personnel or firms, as

outlined below.

- The flue must be installed in such a way as to guarantee that periodic

cleaning can be carried out without dismantling any parts

whatsoever.

- Pipes should always be sealed with silicone (not cement-based

sealants) or specially adapted gaskets/seals, which retain their

strength and elasticity at high temperatures (250°C), and should be

fixed with 3.9 mm ø self-tapping screws.

Do not install dampers or valves that could block the passage

of flue gas.

Do not connect to a flueway into which other appliances

(boilers, extractor hoods, etc.) discharge fumes or vapours.

MIN 40 cm

DT2030335-00

Fig. 17

MIN 40 cm

DT2030336-00

Fig. 18

Protezione pavimento

Zona radiante dell’apertura

del focolare

Parete posteriore

Parete laterale

B B

STUFA

E E

DT2031515-00

Fig. 16

Rear wall

Side wall

STOVE

Heat radiation area

Floor protection

A 20 cm from the wall behind the stove

B 20 cm from the side wall

C 80cm in the heat radiation area and from the hot air fan

D 50 cm floor proection

E 30 cm (measured from the internal corner of the door opening)

Pipes and maximum usable lengths

Pipes of painted aluminium-clad steel (minimum thickness

1.5mm), stainless steel (AISI 316) or enamelled steel (minimum

thickness 0.5mm) with a nominal diameter of 80 or 100 mm (for

pipes which run inside the flue maximum diameter 150 mm) can be

used.

The male-female connectors must have a minimum length of 50

mm.

The diameter of the pipes depends on the type of installation. The

stove was designed to take 80 mm diameter pipes but, as shown

in Table 1, in some cases the use of double-lined 100 mm diameter

pipes is recommended.

Losses in pressure associated with a 90° bend can be

compared to those incurred by one metre of pipe. An

inspectable union-tee can be considered equivalent to a 90°

bend.

EXAMPLE: : if installing a section greater than 4.5m in length with

80mm diameter pipe, calculate the maximum usable length in the

following ways:

- If a maximum of three 90° bends are used, the maximum length of

the section will be 4.5m

- If a maximum of two 90° bends are used and bearing in mind that a

90° bend can be replaced by one metre of pipe, the maximum length

of the section will be 4.5m+1m=5.5m

- If a maximum of one 90° bend is used and bearing in mind that a 90°

bend can be replaced by one metre of pipe, the maximum length of

the section will be 4.5m+1m+1m=6.5m

Where 100mm diameter pipe must be used, connect it to the stove

flue outlet with a 80mm union-tee then use a 80mm 100mm adaptor

(not supplied by Piazzetta) (Fig. 19).

Union-tee

The use of this type of fitting must allow for the collection of

condensate mixed with soot, which builds up inside the pipe. It must

also permit periodic cleaning of the flue without the need to

disassemble the pipes.

This type of fitting can be bought at Piazzetta retail outlets together

with the pipes.

An example is given below of a flueway connection, which allows

complete cleaning without having to disassemble the pipes (Fig 20).

English

TABLE 1 – LENGHT PIPES

TYPE OF INSTALLATION

WITH 80mm Ø PIPE

WITH DOUBLE-WALLED

100mm Ø PIPE

Maximum length (with three 90° bends) 4.5 m 8 m

For installations more than 1200m above sea level

- Required

Maximum number of bends 3 4

Length of horizontal sections with minimum 3% gradient

2 m 2 m

RACCORDO A T CON TAPPO

A CHIUSURA ERMETICA

RACCORDO

ø 80 > ø 100

ø 80mm

ø 100mm

DT2030337-00

Fig. 19

ISOLANTE

RACCORDO A T

DIREZIONE

DI PULIZIA

DIREZIONE DI PULIZIA

Max 2m

(min. 3%)

DIREZIONE DI PULIZIA

DT2030338-00

Fig. 20

Straight reducer

ø 80 > ø 100

Tee with sealing plug

Insulating material

Tee

Direction of

cleaning

Direction of cleaning

English

1.10

Connecting to a conventional chimney - Fig. 21 - 22

If you wish to use an existing chimney it is strongly recommended that

you have it checked by a professional chimneysweep to ensure that it

is completely airtight. The reason for this is that the smoke, because it

is slightly pressurised, can infiltrate any cracks in the flue and escape

into living spaces. If upon inspection you find that the chimney is not

completely sound, it is recommended that you insert piping made of

new material. If the existing chimney is wide enough we recommend a

pipe with a maximum diameter of 150mm. It is also recommended that

you insulate the chimney flue (Fig. 21-22).

Pipes and bends made by Gruppo Piazzetta S.p.A. are recommended

for connection to the flueway, since they are sized to fit the flue outlet

of the appliance.

Other pipes may be applied after adaptation and checking of the

compatibility of the coupling, taking into account that the pipes and

bends must be made in compliance with current regulations. In this

case, however, Gruppo Piazzetta S.p.A. only guarantees trouble-free

operation for parts that it manufactures and that are used according to

specifications.

Connection to the flue must respect the 40cm minimum safety

distance from heat-sensitive structural components or inflammable

materials (wood panelling, beams or ceilings, etc). (See figures 17-18).

- If the connector has to pass through partitions or walls of inflammable

or heat-sensitive materials, or through load-bearing walls, create:

an insulating barrier equal to or greater than 10cm around the

connector using mineral-based insulating material (rock wool,

ceramic fibre) with a nominal density greater than 80kg/m3.

- If the connector has to pass through non-flammable partitions or

walls, create:

an insulating barrier equal to or greater than 5cm around the

connector using mineral-based insulating material (rock wool,

ceramic fibre) with a nominal density greater than 80kg/m3.

- Check that the connection to the flueway is gas/smoke-tight, since

the appliance operates in a vacuum.

- Check that the pipe does not penetrate too far into the flueway,

thereby choking the pipe for the passage of smoke and combustion

gases.

Ensure that all installation work is carried out to professional

standards.

COMIGNOLO

RACCORDO A T

CON CANNA FUMARIA

NON INTEGRA

INSERIMENTO DI

UN TUBO

SPORTELLI PER

ISPEZIONE

ISOLANTE

Max ø150 mm

ø 80 mm

DT2030339-00

Fig. 21

FLANGIA DI CHIUSURA

FLANGIA DI CHIUSURA ERMETICA

IN ACCIAIO INOX O ALLUMINATO

PRESA D'ARIA ESTERNA

CON GRIGLIA NON RICHIUDIBILE

DT2030340-00

Fig. 22

Insulating material

Tee

Chimney stack

Pipe insertion

With damaged flue

Inspection

windows

Closing flange

Sealing flange in stainless

steel or aluminium

Fresh air intake with

non-closable grille

English

PRESA D'ARIA ESTERNA CON

GRIGLIA NON RICHIUDIBILE

DT2030341-00

Fig. 23

1.11 Using an external flue - Fig. 23

An external flue can be used provided it complies with the following

requirements:

- use only insulated stainless steel pipes (double-lined) fixed to the

outside wall of the building (Fig. 23);

- there must be an inspection opening at the base of the flue to permit

periodic checks and maintenance;

- the flue must be fitted at the top with a chimney stack with down-

draught cowl, also ensuring compliance with the safety distance from

the roof ridge as outlined in the section entitled “GENERAL RULES”,

under “Chimney stack”.

Ensure that all installation work is carried out to professional

standards.

1.12 Prevention of domestic fires

The product must be installed and used in compliance with the

manufacturer’s instructions and European and national standards as

well as local regulations.

When a flue pipe passes through a wall or a ceiling, special

installation methods must be applied (protection, thermal

insulation, distances from heat-sensitive materials, etc.) See

the paragraph “Connection to the flueway

- It is also recommended that all elements made of combustible or

inflammable material, such as beams, wooden furniture, curtaining,

flammable liquids, etc. be kept outside the heat radiation range of the

stove and in any case at a distance of at least 80 cm from the heating

block.

- For other information, see the paragraph “Minimum safety

distances” and “Connection to a conventional chimney”.

- The flue pipe, chimney stack, chimney and fresh air intake must

always be free of obstructions, clean and checked periodically, that is,

at least twice during the seasonal period from the lighting of the stove

and during its use. When the stove has not been used for some time

it is advisable to carry out the checks mentioned above. For further

information, consult a chimneysweep.

- Only use recommended fuels (See paragraph “Fuels”).

Fresh air intake with

non-closable grille

2.1 Features

Cladding: hand-made majolica

Interior: steel

Baffle plate and hearth: cast iron

Grate: cast iron

Door: cast iron with ceramic glass heat resistant up to 750°C

Handle: in enamelled steel, concealed flush with front

Control panel: remote control with LCD and digital control panel on stove

Timer thermostat: standard with daily, weekly and weekend programming modes divided into two time bands

Power setting: from 1 to 4

Ash drawer: removable

Fuel: natural pure wood pellets (see section “FUEL”)

Heating: forced ventilation with the Multifuoco System, three fan settings, possibility of operation with room

temperature setting as measured by the remote control (see section “Multicomfort”), front hot air outlet at

bottom, set-up for ducting outlet at rear (see section “Multifuoco System”)

Humidifier: stainless steel, contains 50 cl water

2.2 Technical data

Data obtained under laboratory conditions with pellets of heat production rated at 5kWh/kg

N.B.: the above data may vary according to the characteristics of the pellets being used. (See section “FUEL”)

(See section “FUEL”)

English

2.0 TECHNICAL CHARACTERISTICS AND SPECIFICATIONS

DT2011053-00

UNIT

P957

Nominal thermal power (max/min) kW 8.9 / 2.7

Hourly fuel consumption (max/min) kg/h 2.01 / 0.64

Efficiency (max/min) % 86 / 81.5

Draught when connected to chimney Pa 10÷15

Fuel tank capacity kg / (l) 18 / (27.5)

Electrical power supply V 230

Frequency Hz 50

Frequency only for Japan Hz 60

Maximum power rating W 330

Power rating (max/min) W 90 / 70

Exhaust outlet diameter cm ø8

Fresh air intake (recommended minimum section) cm

100

Weight of stove with majolica kg 181

Packing sizes (DxWxH) cm 69x69x130

English

2.4 Dimensional diagram

DIMENSIONI P957

DT2031517

108,2

58,4

Ø8Scarico3

15,2

8,2

DT2031517-00

Dimensions in cm

2.3 Product identification data

The rating plate gives the data and ratings of the appliance.

If the rating plate is missing, has been removed or tampered with,

any installation and maintenance operations are made difficult due

to lack of product identification.

In the event of damage, please ask the Piazzetta after-sales service

centre for a copy.

Product name

Serial number

DT2030624-02

DATI DI IDENTIFICAZIONE STUFA P957

DT2031552

TARGHETTA TECNICA

DI IDENTIFICAZIONE

DEL PRODOTTO

DT2031552-02

Production

identification and

rating plate

Diameter Ø8

English

SCHEMA ELETTRICO P950

DT2030322

AL1

AL2

ACC.

COC.

FUMI

SCAM.

FAN1 FAN2

SERIALE

DISPLAY

TERM.

-TC1+

N.AMB.

N.H2O

N.PEL.

BLU

GND

+5V

ENC

4 2

2 4 5

4 5

6 6

DT2030322-00

2.5 Wiring diagram

Pos. Key to parts Pos. Key to parts

A Emergency display M Power supply with fuse (5X20 4AH250V)

B Antenna N Smoke sensor

C Room fan O Room sensor

D Pellet-loading auger P External thermostat connection

E Flue gas fan Q Serial port DB9

F Capacitor R Motherboard

G N.O. Pressure switch (normally open) S Fuse 5X20 4AL250V

H N.C. 80° thermostat (normally closed) T Fan card

I Microswitch U Fuse 5X20 500mAL250V

L Ignition glow plug V Flat cable

N° Key to colours

1 White

2 Yellow-green

3 Black

4 Brown

5 Blue

6 Red

7 Grey

English

3.0 FUEL

DT2010233-03

4.0 PREPARING FOR INSTALLATION

DT2010074-01

During operation some parts of the stove (door, handle, controls, ceramic

parts) can reach high temperatures. Take great care and all the necessary

precautions, especially in the presence of children, the elderly or disabled

and pets.

To prevent accidents or damage to the product we recommend the

following:

• unpacking and installation must be carried out by at least two people;

• every operation involving movement of the product must be carried

out with the proper tools in full compliance with current safety

regulations;

• the packaged product must be kept in the position according to the

directions shown by the diagrams and notices on the pack;

• if ropes, straps or chains are used, ensure that they are able to take

the weight of the pack and that they are in good condition;

• use slow continuous movements when moving the pack to avoid

jerking the ropes, chains, etc.;

• do not tilt the package excessively to avoid toppling;

• never stand in the vicinity of loading/unloading equipment (forklift

trucks, cranes etc).

Before installing the product make sure that you have the

correct equipment.

Unpack the product being careful not to damage or scratch it,

take the accessories pack and any pieces of polystyrene or

cardboard used to wedge moveable parts etc. out of the stove

firebox.

Keep packaging (plastic bags, polystyrene, etc.) out of reach

of children, since it could be a potential source of danger, and

dispose of according to local regulations.

The wood pellet is obtained by pressing wood sawdust left over from the

working of natural dried wood. The typical small, cylindrical form is obtained

by passing the material through a die. Thanks to lignin, a natural element

which is released during the pressing of the raw material, the pellets acquire

a good consistency and compactness without requiring treatment with

additives or caking agents.

There are various types of pellet on the market with qualities and

characteristics that vary depending on the processes they have undergone

and the type of wood used in their production.

Since the characteristics and quality of the pellet considerably affect

stove performance, efficiency and proper operation, we recommend that

you use high-quality pellets.

Gruppo Piazzetta S.p.A has tested and programmed its stoves and can

ensure best performance and trouble-free operation using pellets with

the following specific characteristics:

To ensure trouble-free operation:

DO NOT use pellets with dimensions other than those recommended by the

manufacturer

DO NOT use pellets which are out of date or which contain loose sawdust,

resins, chemical substances, additives or caking agents.

DO NOT use damp pellets.

Choosing other and unsuitable pellets:

- obstructs the grate and flue gas pipes

- increases fuel consumption

- reduces efficiency

- means that proper stove operation cannot be guaranteed

- causes dirt to build up on the glass

- leaves particles which have failed to burn and heavy cinders

The presence of moisture in the pellets increases their volume and

causes them to split which in turn causes:

- malfunction of the fuel-loading system

- inefficient combustion

Pellets should be stored in a sheltered, dry place.

To use good quality pellets with dimensions and heat-producing properties

other than those recommended above, it will be necessary to change the

stove operating parameters.

This “customisation” of stove settings must be carried out at a Gruppo

Piazzetta S.p.A. Service Centre or by specially qualified personnel

authorised by Gruppo Piazzetta S.p.A.

Using pellets that are out of date or not in conformity with the

manufacturer’s recommendations not only damages the stove and

jeopardises its performance, but can render the guarantee null and

void and relieves the manufacturer of all liability.

DT2030346-00

Fig. 24

Pellet characteristics

Components natural pure wood pellet

Length, approx. 10 – 30 mm

Diameter, approx. 6 – 6.5 mm

Apparent density, approx. 650 kg/m3

Specific weight, approx. > 1.0 kg/dm3

Net heat value, approx. 5 kWh/kg

Moisture content, approx. < 8%

Residual ash, approx. < 0.34%

N.B. the above data refer to beech/fir wood pellets

English

5.0 INSTALLATION

DT2011054-00

External pressure switch

• The stove is fitted with an external pipe tap for measuring the

pressure (vacuum) in the flue gas outlet pipe. Authorised personnel

should carry out this verification and control whilst the stove is being

installed.

Cladding

• Having completed assembly of the stove and installed any external

room thermostat, proceed with assembly of the stove cladding,

referring to the ceramic cladding instruction booklet provided with the

stove.

5.1 ‘Multifuoco’ system - Fig. 25 / 27

• Piazzetta’s technological research and development mean that

this pellet stove offers the advantages of the ‘Multifuoco’ system,

a system exclusive to and patented by Gruppo Piazzetta S.p.A.

and a true innovation in the field of pellet stoves.

• The ‘Multifuoco’ system revolutionises all methods of heat

circulation currently in use in pellet stoves: the heat produced by

the hearth is circulated into the atmosphere not only from the

base of the stove itself, but it can also be directed via 75mm-

diameter hoses to adjoining rooms (fig 26).

This exclusive heat distribution system offers many notable

advantages: even temperature distribution; heating of adjoining

rooms (fig 25).

• The heat produced is propelled by a fan and distributed via the

outlet located on the front of the stove (fig 27).

DT2010071-01

DT2030162-00

Fig. 26

DT2030173-00

Fig. 27

DT2030163-00

Fig. 25

Instructions for ducting the hot air

• The fan system which pushes hot air into the room is fitted with

a Y-element, which effectively allows the air flow to be split up,

directing it via a hose also to the back of the stove from where it

can then be ducted into adjoining rooms.

• Below are some examples of stove installation and examples of

how to duct the hot air to heat other rooms. Such examples are

intended as demonstrations; optimum performance depends in

each case on conditions in the room where the stove is installed

and in the adjoining rooms.

It is of fundamental importance that when ducting heat from

the rear of the stove, the outlets near the stove or the Y-

element must not be closed in order to avoid overheating.

In cases where only one rear outlet from the fan is

envisaged, the outlet must always be kept open.

The examples give guidelines for ducting. Each diagram gives just

one example of the many possible solutions.

Pursuant to current regulations on the safety of electrical equipment, you must contact a Piazzetta After-Sales Service Centre or a qualified

electrician for all and any work connected with installation, maintenance or servicing that involves access to electrical parts.

English

SOLUTION 1 - Fig. 28-29:

• The stove is installed in the room which is to be heated, with the

hot air directed to the front only, as when the stove arrives from

the factory (fig. 28). Alternatively the air can flow to the rear by

connecting a 7.5 cm diameter hose to the fan outlet (fig. 29). In

this case the stove heats the room where it is installed by

radiation only, and heats the adjoining room through the

ductwork to the rear.

For the example shown in fig. 29 it is necessary to use an

outlet which is permanently open.

SOLUTION 2 - Fig. 30

• The stove is installed in the room to be heated with the hot air

ducted to the front and also to the rear by installing a Y-element,

thereby allowing the heating of a second room. A 7.5 cm diameter

hose with a maximum length of 4.5 metres is connected to the fan

outlet (fig. 30).

For the example shown in fig. 30 the outlet should be

partially open but never fully closed to avoid overheating.

SOLUTION 3 - Fig. 31:

• Extending the previous solution, with the stove installed in the

room to be heated and the air flow ducted to the front and the

rear, but using a second Y-element at the rear as shown in the

figure. Use a 7.5 cm diameter hose with a maximum total length

of 4.5 metres (fig. 31).

For the example shown in fig. 31, for efficient ducting it is

necessary to use only partially open outlets as shown

DT2030164-00

Fig. 28

1 m

DT2030165-00

Fig. 29

4.5 m

DT2030166-00

Fig. 30

Open outlet

Partially open outlet

0.5 m

1 m

DT2030167-00

Fig. 31

Partially open outlet

English

Ducting through walls or floors - Fig. 32 / 35

To ensure efficient ducted heat distribution:

1) lag the pipe with insulating material to limit heat loss and

ensure a sufficiently high air temperature;

2) do not exceed the total maximum hose length of 4.5 m.

Below are some examples of how the hose can be installed in walls

or floors (for better performance, lag the hose with suitable

insulating material).

Hot air outlet vent radiation area (mm) - Fig. 36

A safety area must be ensured around the hot air outlet vent within

which there must be no flammable objects (furniture, carpets,

curtains, etc.) or heat sensitive materials (wood, plastic, etc.).

The diagram to the side shows the measurements for this safety

area, which includes 600mm from the upper edge of the vent.

5.2

Electrical connection and the room sensor connection - Fig. 37 / 39

• The stove comes with a power cable which must be connected to

a 230v/50Hz (230V/60Hz only for Japan) supply. Connection to

the rear of the stove is shown in fig. 39.

• The power rating is indicated in the paragraph “Technical data” in

this booklet.

• According to law the installation must be earthed and include a

residual current circuit breaker.

• Ensure that in its normal position the power cable does not come

into contact with any heated parts.

Ensure that the electrical socket is accessible also after

installation of the stove.

• When installing the stove, it is necessary to connect the room

sensor (provided) in the correct socket (fig. 38). The sensor can

be positioned as shown in fig. 38, otherwise remove the band and

uncoil the lead and then place the sensor in a spot where a more

accurate room temperature reading can be obtained.

R600

600

600600

BOCCHETTA USCITA ARIA CALDA

DT2030172-00

Fig. 36

DT2030169-00DT2030168-00

DT2030171-00DT2030170-00

Fig. 32 Fig. 33

Fig. 34 Fig. 35

hot air outlet vent

COLLEGAMENTO ELETTRICO P957

DT2031528

DT2031528-00

Fig. 37

COLLEGAMENTO SONDA AMBIENTE P957

DT2031530

DT2031530-00

Fig. 38

COLLEGAMENTO CAVO DI ALIMENTAZIONE P957

DT2031529

Fig. 39

DT2031529-00

1 External socket for connection of room sensor.

2 Socket for power lead.

3 External pressure pipe tap.

4 Hole for inserting cable gland PG7 for connection of external thermostat.

5 Room sensor connection.

6 Power cable connection.

English

5.3 Installing the external thermostat - Fig. 40 / 42

• The appliance is designed for connection to an external room

thermostat. To connect the thermostat use a 2x0.5mm2 cable secured

with a PG7 cable gland to be inserted in the relative hole in the rear panel

(fig. 42).

Only authorised personnel should carry out this operation.

Installation can be carried out with any type of room thermostat

but requires a PG7 cable gland similar to that shown in fig. 41. To

connect the room thermostat to the electronic board, refer to the

wiring diagram.

Proceed as follows for installation:

• Remove the protective panel from the electronic board and then remove the

rear panel (fig. 40).

• Insert the thermostat cable through the PG7 gland and then insert the gland

in the hole in the rear panel (fig. 42).

• Connect the room thermostat cable terminal to the 2-pin terminal of the

electronic board (fig. 40).

• Refit the rear panel, ensuring that the cable inside the stove cannot come

into contact with hot or moving parts.

• Refit the protective panel over the electronic board.

5.4 Installing the Y-element (optional) - Fig. 43 / 51

•

Ducting of heat to adjoining rooms is at the user’s discretion.

The Y-element should be attached to the fan outlet. Proceed as follows:

1. Remove the stove rear panel.

2. Uncoil the hose from the fan outlet by loosening the clip which holds

it in place (fig. 43).

3. Cut off approx. 5 cm hose (fig. 44).

4. Fix the hose to the Y-element using the clip that was previously

loosened (fig. 45).

5. Fix the Y-element to the fan outlet using the screws provided (figs. 46

– 47).

6. Using the hose clip provided, attach a piece of hose to the second

branch of the Y-element, of sufficient length to reach the duct

embedded in the wall (fig. 48).

7. Remove the knockout from the rear panel (fig. 49).

8. Replace the rear panel.

9. Move the stove closer to the wall (fig. 50) and, using the hose clips

provided, fix the hose to the duct in the wall (fig. 51).

10. Place the stove in the desired location, complying with the minimum

safety distances (see section 1.8).

1 Thermostat. 3 Cable clamp.

2 Electronic board 2-pin terminal. 4 Thermostat cable terminal.

DT2030174-00DT2030182-00

DT2030176-00DT2030175-00

Fig. 43 Fig. 44

Fig. 45 Fig. 46

DT2030177-00

DT2030181-00DT2030180-00

Fig. 47

Fig.50 Fig. 51

DT2030179-00DT2030178-00

Fig. 48 Fig. 49

Loosen the

hose clip

Cutting the hose

Tightening the

screw

SCHEDA ELETTR.INST. TERMOSTATO AMB. P957

DT2031518

DT2031518-00

Fig.40

IMMAGINE 1531

DT2031531

DT2031531-00

Fig.42

DT2030076-00

Fig. 41

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Piazzetta P957 Instructions For Installation, Use And Maintenance Manual

Marca: Piazzetta

Modello: P957

Categoria: Stufa a pellet

Tipo: Instructions For Installation, Use And Maintenance Manual

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