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The instruction manual is an integral part of the product.
Please read this entire manual before installation and use of this
pellet fuel-burning room heater. Failure to follow these instructions
could result in property damage, bodily injury or even death.
Save these Instructions.
Contact local building or re ofcials about restrictions and
installation inspection requirements in your area.
Pellet Stove
P958 - P958 C - P958 D - P958 M
INSTRUCTIONS FOR INSTALLATION,
USE AND MAINTENANCE
English

Dear Customer,
Thank you for having chosen one of our products, which is the result of years of experience and continuous research aimed at making a superior
product in terms of safety, reliability and performance.
This booklet contains information and advice for safe and efcient use of your product.
IMPORTANT INFORMATION
The following symbols are used in some parts of the booklet:
a CAUTION: for actions that require particular caution and
suitable preparation.
d FORBIDDEN: for actions that UNDER NO CIRCUMSTANCES
must be carried out.
a Contact local building authority (such as municipal building
department, re department, re prevention, bureau. etc.)
before installation to determine if a permit and/or inspection
is required.
• This instruction booklet has been prepared by the manufacturer and is
an integral part of the product. In the event of sale or relocation of the
product make sure this booklet accompanies it, since the information
contained in it is intended for the purchaser and for anyone involved
in the installation, use and maintenance of the product.
• Read the instructions and the technical information contained in
this booklet carefully before proceeding with installation, use or any
repairs.
• The observance of the instructions and technical information in this
instruction booklet guarantees the safety of persons and property; it
also ensures more efcient operation and an increased lifespan.
• Gruppo Piazzetta S.p.A. cannot be held responsible for damage or
injury due to failure to comply with the instructions for installation,
use and maintenance given in this booklet, or due to unauthorised
alterations or to the use of other than original spare parts.
• Appliance installation and use must conform with the manufacturer’s
instructions as well as with European and national legislation and
local regulations.
• Installation, electrical connection, checks, maintenance and repairs
are operations which must be carried out exclusively by qualied and
authorised personal with specialised knowledge of the product.
• The wall against which the product is to be placed must not be of
wood or any other ammable material. For correct installation it is
also important to comply with the section entitled “MINIMUM SAFETY
DISTANCES”.
• Before installing the product read all instruction booklets relevant to
the cladding, the ventilation kit and any other accessory.
• Check that the oor where the product is to be installed is perfectly
level.
• When handling the steel parts of the cladding it is advisable to use
clean cotton gloves to avoid leaving ngerprints that are difcult to
remove at rst time of cleaning.
• The stove must be assembled by at least two persons.
See the guarantee certicate enclosed with the product for the terms, limitations and exclusions.
In line with its policy of constant product improvement and renewal, the manufacturer may make changes without notice.
This document is the property of Gruppo Piazzetta S.p.A.; no part of it may be disclosed to third parties without the written permission of
Gruppo Piazzetta S.p.A. All rights reserved by Gruppo Piazzetta S.p.A..
• Connect the pellet stove to the electricity supply only after it has been
connected by an expert to the ueway.
• The plug at the end of the power cable must be easily accessible after
installation.
• Use only recommended wood pellets in the pellet stove (refer to
section entitled “FUEL”).
• Never use liquid fuels to light the pellet 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 malfunctioning the fuel supply will be stopped. Restart
the stove only after having eliminated the cause of the malfunction.
• Stop using the product in the event of fault or malfunctioning.
• Do not remove the protective grille from the pellet hopper.
• Any build-up of unused pellets in the burner left over from repeated
failed ignitions must be removed before attempting to light the stove
again.
• Stove operation can result in surfaces, handles, ue pipe and glass
becoming extremely hot. When the stove is in operation, only touch
these parts if wearing protective clothing otherwise use suitable tools.
• Because of the build-up of heat on the glass, take care that those who
are unfamiliar with stove operation do not linger near the stove.
• This appliance must not be used by persons (including children) with
reduced physical, sensory or mental capacities, or lack of experience
or knowledge unless they are supervised or instructed on use of the
appliance by the person who is responsible for its safety.
• 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.
a In the event of difculties or if you are unable to understand
the instruction booklet, contact your local dealer.
d Do not place objects which are not heat-resistant on top of
the stove or within the recommended minimum safety area.
d Do not open the door while the stove is in operation or operate
the stove when the glass is broken.
d In case of any alarm signals do not unplug the stove: just turn
the unit OFF.
H07031310 / DT2002112 – 00
2
English
DT2010208-08
DT2010001-01

1.0 GENERAL RULES 4
1.1 Soot inspection 4
1.2 Fresh air intake 5
1.3 Outside combustion air 5
1.4 Installation environment 6
1.5 Capacity load of the floor 6
1.6 Minimum safety distances 7
1.7 Flueway 8
1.8 Interior vent installation 10
1.9 Connecting to a conventional chimney 11
1.10 Installing into an existing fireplace chimney 12
1.11 Short rise installation – Wall outlet 12
1.12 Minimum flue vent configuration 13
1.13 Venting: termination requirements 14
1.14 Prevention of domestic fires 15
1.15 Mobile home installation 16
2.0 TECHNICAL CHARACTERISTICS AND SPECIFICATIONS 17
2.1 Features 17
2.2 Technical data 17
2.3 Accessories and equipment 18
2.4 Product identification data 18
2.5 Dimensional diagram P958 19
2.6 Dimensional diagram P958 C 19
2.7 Dimensional diagram P958 D 20
2.8 Dimensional diagram P958 M 20
2.9 Wiring diagram 21
3.0 FUEL 22
4.0 PREPARING FOR INSTALLATION 22
5.0 INSTALLATION 23
5.1 Multifuoco System 23
5.2 Electrical connections and controls 26
5.3 Installing the external thermostat 26
5.4 Installing the Y-element (optional) 27
6.0 USE 28
6.1 Loading the pellets 28
6.2 Remote control 29
6.3 Lighting for the first time 30
6.4 Startup and normal operation 30
6.5 Troubleshooting 33
6.6 Control panel 36
6.7 Setting the language 36
6.8 Programming 37
6.10 Setting unit of temperature measurement 38
6.9 Programming the clock 38
6.11 Timer 39
6.12 Multicomfort 45
6.13 Energy Saving 45
6.14 Parameter menu 47
6.15 Enable beep (audio signal) 51
6.16 Stove status 51
6.17 Modifying the transmission unit 52
6.18 ‘Multifuoco’ system operation 52
6.19 Safety devices 53
6.20 Opening the door 57
6.21 Stove humidifier 57
6.22 Disposal of ashes 57
7.0 MAINTENANCE 58
7.1 Cleaning the grate and the grate support 58
7.2 Cleaning the ash tray 58
7.3 Cleaning the firebox 59
7.4 Cleaning the smoke chamber 59
7.5 Cleaning the flue system 60
7.6 Cleaning the ceramic cladding 60
7.7 Cleaning the enamelled metal parts 60
7.8 Cleaning the glass (daily) 60
7.9 Replacing the window 61
7.10 Replacing the remote control batteries 61
7.11 Cleaning the fans 62
7.12 When not in use 63
7.13 Scheduled maintenance 63
8.0 TROUBLESHOOTING 64
8.1 Replacing the fuses 68
Reference standards 68
CONTENTS
Section Title Page
This booklet code H07031310 / DT2002112 - 00 (06/2014) comprises 72 pages.
H07031310 / DT2002112 – 00 3
English
DT2010187-00

H MIN 5'
H MIN 13'
INSULATING
MATERIAL
TEE
TEE
DIRECTION
OF CLEANING
DIRECTION
OF CLEANING
DIRECTION
OF CLEANING
TEE
PELLET
STOVE
0 ÷ 10'
MIN 3%
SEE VENT MANUFACTURER'S
INSTRUCTIONS
Fig. 9
Ø 4"
Ø 3"
TEE W/TEE CAP
PELLET
STOVE
Fig. 8
Where 4” diameter pipe must be used, connect it to the stove ue outlet
with a 3” union-tee then use a 3” – 4” adaptor (Fig. 8).
Union-tee
The use of this type of tting must allow for the collection of condensate
mixed with soot, which builds up inside the pipe.
It must also permit periodic cleaning of the ue without the need to
disassemble the pipes.
Single or double clean-out tees may be used.
An example is given below of a ueway connection, which allows
complete cleaning without having to disassemble the pipes (Fig. 9).
a Gruppo Piazzetta S.p.A. assumes no responsibility for, nor
does the warranty cover, smoke damage caused by reverse
drafting of pellet stoves under power failure conditions or as
a result of extreme negative pressure in the home.
H07031310 / DT2002112 – 00 9
English
DT2033008-01
DT2033009-00

The stove may be connected to an existing Class A chimney or a masonry
chimney which meets the minimum requirements of NFPA 211. Using
this kind of installation the pellet stove is able to draft naturally without
exhaust blower operation (failure), reducing the probability of burn-back
and back-drafting.
a Check that the connection to the ueway is gas/smoke-tight,
since the appliance operates in a vacuum.
• 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 (Fig. 12). The reason for this is that the smoke,
because it is slightly pressurised, can inltrate any cracks in the ue
and escape into living spaces. If upon inspection you nd that the
chimney is not completely sound, a relining of the chimney with either
PL vent or single wall stainless steel pipe may be necessary to bring
the chimney into compliance. If the existing chimney is wide enough
we recommend a pipe with a maximum diameter of 6”.
Put attention: some areas require that a liner must be always installed
to the top of the ue, as shown in gure even if the existing chimney
is in compliance (Fig. 13).
• When chimneys are relined, a chimney chase cap that reduces the
outlet of the chimney to the size of the liner is required. Extend the
exhaust vent above the chimney chase cap and nish it off with a
rain cap. A single wall liner may need to be insulated to maintain
adequate exhaust temperatures in the vent system.
a Outside Chimneys frequently are difcult to keep warm: it is
recommended that you insulate the liner.
• Venting into the side of an existing masonry chimney must be done
through a masonry thimble. When wall penetration is necessary to
access a masonry chimney, use a listed PL vent wall thimble (Fig.
12-13).
• When venting into a Class A steel chimney, (Fig. 14), use an appropriate
PL Vent adapter.
a Strictly observe the PL Vent manufacturer’s safety
specications.
a INSTALL VENT AT CLEARANCES SPECIFIED BY THE VENT
MANUFACTURER.
a Ensure that all installation work is carried out to professional
standards.
DT2010232-02
1.9 CONNECTING TO A CONVENTIONAL CHIMNEY
MASONARY MUD THIMBLE
PL ADAPTER
TEE (T)
VENT
SOOT
INSPECTION
APERTURE
PL ADAPTER
TEE (T)
VENT
MASONRY MUD THIMBLE
SOOT
INSPECTION
APERTURE
TEE
FRESH AIR
INTAKE
VENT
PL VENT ADAPTER
SEE VENT
MANUFACTURER'S
INSTRUCTIONS
Fig. 12
Fig. 13
Fig. 14
H07031310 / DT2002112 – 00 11
English
DT2033037-01
DT2033036-01
DT2033038-01

This kind of installation also provides natural draft in the event of a
power failure.
When installing as a hearth mount stove into a rebox the unit must
either be relined, terminating above the chimney chase top, or positively
connected to the existing chimney system using a block off plate (Fig.
15-16).
An approved ex liner of PL vent must be used.
In some areas it is required that the vent pipe extend all the way to the
top of the chimney. The pipe or liner inside the chimney should be 4”
diameter (Fig. 16).
a A chimney system with known drafting problems may require
a liner, which may also need to be insulated to keep vent
system warm in cold chimney environment.
a A cap shall be installed on the chimney to keep out rain.
a Strictly observe the PL Vent manufacturer’s safety
specications.
a INSTALL VENT AT CLEARANCES SPECIFIED BY THE VENT
MANUFACTURER.
a Strictly use listed pellet vent pipe ttings.
a Ensure that all installation work is carried out to professional
standards.
When terminating the exhaust system under the houses eaves, (Fig. 17)
the following requirements shall be fullled:
- in selecting locations for appliance and vent, take into consideration
the NPFA 211 6-3.5 rule for distance of exit terminal from window
and openings;
- run the vent vertically up the wall, ensuring to maintain a minimum of
3” clearance between the wall and vent;
- a wall band must be installed just above the tee and at least every 6’
of vent rise or, if the rise is inferior, at the end of the vertical run;
-after a rise of at least 5’ (1,5 m), install a 90° elbow aimed out from
the building wall;
- attach a 45° elbow to the 90° elbow, aiming the second elbow down
toward the ground. Terminate the vent with a collar with screen
fastened to the 45° elbow;
- the end of the vent pipe system must be at least twelve inches (12”)
from the wall and 24” below the eave.
DT2010232-02
1.10 INSTALLING INTO AN EXISTING FIREPLACE CHIMNEY
DT2010232-02
1.11 SHORT RISE INSTALLATION – WALL OUTLET
TEE
POSITIVE
BLOCK PLATOFF E
TEE
POSITIVE
BLOCK OFF PLATE
RAIN CAP
CHIMN INEY FLASH G
PL VENT SYSTEM
> 24"
>5'
>12"
45°
ELBOW
90° ELBOW
TERMINATION
COLLAR
TEE
VENT
WALL BAND
Fig. 15
Fig. 16
Fig. 17
H07031310 / DT2002112 – 00
12
English
DT2033039-00
DT2033040-00
DT2033041-00

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, efciency 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 specic characteristics:
Pellet characteristics
Components natural pure wood pellet
Length, approx. ¼” – 1 ¼” / (7 – 30 mm)
Diameter, approx. 0.23” – 0.25” / (6 – 6.5 mm)
Apparent density, approx. 40.5 lb/ft
3 / (650 kg/m3)
Net heat value, approx. 8000 BTU/lb / (5 kWh/kg)
Moisture content, approx. < 8%
Residual ash, approx. < 0,5%
N.B. the above data refer to beech/r wood pellets
To ensure trouble-free operation:
DO NOT use pellets with dimensions other than those recommended by
the manufacturer.
DO NOT use poor quality pellets containing sawdust, bark, maize, resins
or chemical substances, additives or adhesives.
DO NOT use damp pellets.
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).
a 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 rebox.
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.
a Installation and assembly of the stove must be carried out by qualied personnel.
Choosing other and unsuitable pellets
- obstructs the grate and ue gas pipes;
- increases fuel consumption;
- reduces efciency;
- 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;
- inefcient 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.
a The use of cordwood is prohibited. Do not burn garbage or
ammable uids such as gasoline, naphtha or engine oil.
a This “customisation” of stove settings must be carried out by
specially qualied personnel authorised by Gruppo Piazzetta
S.p.A.
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.
3.0 FUEL
4.0 PREPARING FOR INSTALLATION
H07031310 / DT2002112 – 00
22
English
DT2010233-04
DT2010074-06

6.0 USE
The pellet stove is a different type of heater. Its operation and maintenance differ from the traditional wood stove. Follow these operating instructions
exactly as stated to ensure safe and reliable operation.
• Do not use the stove as a cooking appliance.
• Ensure that the room in which the stove is installed is sufciently well ventilated (fresh air intake).
• A certain amount of carbon monoxide may be produced within the stove as a by-product of combustion. All exhaust vent connections must be
sealed with RTV silicone to assure a gas tight seal. Any leaks into a conned area caused by faulty installation or improper operation of the stove
could produce dizziness, nausea and in extreme cases, death.
• Check (or have checked) regularly that the ue is clean.
• Under no circumstances use fuels other than pellets.
• Remove any deposits of unused pellets left by failed ignition before restarting the stove.
a Direct contact with the stove while operating may cause skin burns.
a 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.
Keep any inammable object well away from the stove while it is in use (MINIMUM 32” - 80 cm) from the front panel.
While in use the door must remain closed and the glass must be present and intact.
The removal of the protective grille inside the pellet hopper is strictly prohibited.
If replenishing with pellets while the stove is lit, ensure that the bag does not come into contact with any hot surfaces.
a Operate this unit only with the fuel hopper lid closed. Failure to do so may result in emission of products of combustion from the
hopper under certain conditions. Maintain hopper seal in good condition.
DT2010035-06
DT2010730-00
6.1 LOADING THE PELLETS
Fig. 53
• When lighting your stove for the rst time, or any time you have run
out of Pellets, you will need to ll the hopper. Pellets are fed from the
hopper to the burn pot by an auger. A high torque motor that is capable
of doing serious harm to ngers drives the auger and for this reason in
Piazzetta pellet stoves a protective grille inside the hopper is placed.
To open the pellet hopper, pull the upper panel and then lift the hopper lid.
d Don’t remove the protective grill inside the pellet hopper.
• To load the pellets into the hopper it is advisable to tear off the edge of
the sack and empty the sack directly into the hopper. This makes lling
easier and avoids pouring pellets on top of the stove.
d Do not allow sawdust to accumulate on the bottom of the
hopper.
d Do not leave leftover pellets on top of the stove – they could
catch re!
d Do not overll the hopper.
a Maintain the hopper seal in good condition.
d DO NOT RELOAD WITH PELLETS WHEN THE APPLIANCE IS LIT if the red
reload indicator inside the pellet hopper is visible (see gure to the side).
To load with pellets if the red reload indicator is visible, proceed as follows:
- shut down the appliance;
- load the hopper as described above.
The auger must have the time to ll; during this stage the pellets are not
distributed inside the rebox and it is more than likely that the rst attempt to
ignite the appliance fails; empty and clean the great. Lighting again the stove.
If an alarm is triggered, deactivate the appliance by pressing the ON/
OFF key for a few moments, remove the fuel to be found in the grate
and set a new ignition cycle.
Any unburned pellets to be found in the grate must be disposed of.
The appliance has a system that controls the opening of the hopper lid.
At each opening of the hopper lid, the appliance interrupts fuel supply.
Fig. 54
Fig. 55
a If the sliding top panel remains open for more than 60
consecutive seconds, the stove starts the shut-down procedure
after a 30-second audible beep activates to request that the
sliding top panel be fully closed. The hopper lid must be closed
before sliding the panel into its fully closed position.
a In circumstances where the sliding top panel is left not in its fully
closed position a 30 second audible beep will be activated requesting
the sliding top panel to be manually returned to its fully closed
position, otherwise the stove will go into shut-down procedure.
H07031310 / DT2002112 – 00
28
English
DT2012364-00
DT2030459-01 DT2030460-01
DT2033995-00

PELLET HOPPER HOUSING TEMPERATURE
Sensor Description Display
Thermostat with
automatic reset
Located on the pellet hopper, its function is to prevent excessive
temperature ranges.
WHEN ACTIVATED
If the pellet hopper temperature reaches critical levels, the thermostat
cuts off the power supply to the fuel-loading auger, thereby stopping the
supply of pellets to the grate and starting the stove shutdown process.
• The readout ‘ALC’ appears in the STOVE STATUS mode.
• After approx. 60 seconds the alarm sounds (if activated).
T A N K T E M P
S A F E T Y
!
1
1 2 : 0 0 7 3 F
WHAT TO DO
Shut down the stove by holding the ON/OFF key down for several seconds.
• The alarm will stop.
• Wait until combustion of any pellets remaining in the grate has nished.
• After having cleaned the grate, restart the stove by pressing the ON/
OFF key. (The readout TANK TEMP SAFETY must no longer appear on
the display. If this is not the case repeat the process described above.) DT2010995-00
FLUE GAS FAN RUNNING
Sensor Description Display
Its function is to check correct operation of the ue gas fan so that the
stove can be used in all safety.
If the black-red-white cable connected to the ue gas fan (see the
paragraph “WIRING DIAGRAM”) momentarily or accidentally removed
from its normal position, or is not connected properly to the electronic
board, or the speed of the smoke fan is greater or lower than the set value
according to settings smoke parameter, the readout “ALF 3” or “ALF 4”
will appear in STOVE STATUS MODE.
- The readout “SMOKE FAN FAILURE” appears on the display.
- After approx. 60 seconds the alarm sounds (if activated).
!
1
S M O K E F A N
F A I L U R E
1 2 : 0 0 7 3 F
WHAT TO DO
- Shut down the stove by holding the ON/OFF key down for several
seconds.
- The alarm stops.
- Call the After-Sales Service Centre. DT2012666-00
H07031310 / DT2002112 – 00 55
English
Produktspecifikationer
Varumärke: | Piazzetta |
Kategori: | Värmare |
Modell: | P958 |
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