Unical STILE 27 User guide

INSTRUCTIONS
FOR INSTALLATION,
MAINTENANCE
AND USE
00334578 - 05/13
rev. 0
STILE 27

2
General information
TABLE OF CONTENTS
1GENERAL INFORMATION ............................................................................................................................................................................ 4
1.1 Symbols used in the manual ........................................................................................................................................................................ 4
1.2 Appropriate use of appliance ....................................................................................................................................................................... 4
1.3 Water treatment ............................................................................................................................................................................................ 4
1.4 Information for user ...................................................................................................................................................................................... 4
1.5 Safety warnings ............................................................................................................................................................................................ 5
1.6 Technical data plate ...................................................................................................................................................................................... 5
1.7 General warnings ......................................................................................................................................................................................... 6
2TECHNICAL FEATURES AND DIMENSIONS ........................................................................................................................................... 7
2.1 Technical features ........................................................................................................................................................................................ 7
2.2 Dimensions and hydraulic connections ...................................................................................................................................................... 7
2.3 Technical data ............................................................................................................................................................................................. 11
2.4 Supply.......................................................................................................................................................................................................... 11
2.5 Main components ....................................................................................................................................................................................... 12
2.6 General Information .................................................................................................................................................................................... 12
3INSTALLATION INSTRUCTIONS ............................................................................................................................................................... 14
3.1 General warnings ...................................................................................................................................................................................... 14
3.2 Installation standards ................................................................................................................................................................................ 15
3.3 Packaging .................................................................................................................................................................................................. 16
3.4 Installation .................................................................................................................................................................................................. 16
3.5 Flue connection ......................................................................................................................................................................................... 17
3.5.1 Exhaust through external wall........................................................................................................................................................ 18
3.5.2 Exhaust through roof by means of traditional flue ........................................................................................................................ 19
3.6 Connecting heat stove to system ............................................................................................................................................................ 20
3.7 Filling the system....................................................................................................................................................................................... 20
4ELECTRICAL CONNECTIONS .................................................................................................................................................................... 21
5HEAT STOVE START-UP .............................................................................................................................................................................. 24
5.1 Commissioning .......................................................................................................................................................................................... 24
5.2 Initial lighting checks ................................................................................................................................................................................. 24
6INSPECTION AND MAINTENANCE ........................................................................................................................................................... 25
6.1 Troubleshooting ......................................................................................................................................................................................... 28
7PROGRAMMING SETTING ........................................................................................................................................................................... 29
7.1 Using the product ...................................................................................................................................................................................... 29
7.2 Remote control .......................................................................................................................................................................................... 30
7.3 Function of buttons ................................................................................................................................................................................... 32
7.4 Menu ........................................................................................................................................................................................................... 33
7.4.1 User menu ........................................................................................................................................................................................ 33
7.4.2 Menu 01 - set clock ........................................................................................................................................................................ 35
7.4.3 Menu 02 - set chrono ..................................................................................................................................................................... 35
7.4.4 Menu 03 - choose language........................................................................................................................................................... 39
7.4.5 Menu 04 - standby mode ............................................................................................................................................................... 39
7.4.6 Menu 05 - buzzer mode ................................................................................................................................................................. 39
7.4.7 Menu 06 - initial load ....................................................................................................................................................................... 39
7.4.8 Menu 07 - heat stove status .......................................................................................................................................................... 40
7.5 User operating mode ................................................................................................................................................................................ 41
7.5.1 Lighting STILE 27 ............................................................................................................................................................................. 41
7.5.2 Start-up............................................................................................................................................................................................ 41
7.5.3 Failed ignition ................................................................................................................................................................................... 41
7.5.4 Heat stove working......................................................................................................................................................................... 42
7.5.5 Changing room temperature setting .............................................................................................................................................. 42
7.5.6 Using external thermostat / chronothermostat............................................................................................................................. 42
7.5.7 Changing water temperature setting ............................................................................................................................................. 43
7.5.8 The room temperature reaches the set temperature (SET temperature) .................................................................................. 43
7.5.9 The water temperature reaches the set temperature (SET water temperature) ....................................................................... 44
7.5.10 Restarting after extinction having reached set room and/or water temperature ..................................................................... 44
7.5.11 Cleaning the brazier ..................................................................................................................................................................... 45
7.5.12 Heat stove extinction .................................................................................................................................................................... 45
7.5.13 Heat stove off ................................................................................................................................................................................ 46
7.5.14 Heat stove re-ignition ................................................................................................................................................................... 46
7.6 What happens if......................................................................................................................................................................................... 47
7.6.1 The pellet does not light .................................................................................................................................................................. 47
7.6.2 Electric power is missing ................................................................................................................................................................ 47
7.7 Alarms ........................................................................................................................................................................................................ 48
7.7.1 Flue gas temperature probe alarm ................................................................................................................................................ 48
7.7.2 Flue gas overtemperature alarm ................................................................................................................................................... 48

General information
3
7.7.3 Failed ignition alarm ......................................................................................................................................................................... 49
7.7.4 Extinction during working phase alarm ......................................................................................................................................... 49
7.7.5 Screw safety pressure switch alarm............................................................................................................................................. 49
7.7.6 General thermostat alarm .............................................................................................................................................................. 50
7.7.7 Flue gas intake fan fault alarm ....................................................................................................................................................... 50
7.8 Operational mode (technical menu)......................................................................................................................................................... 51
7.8.1 Submenu 08 - 01 - 01 ..................................................................................................................................................................... 53
7.8.2 Submenu 08 - 02 - 01 chimney type ............................................................................................................................................. 53
7.8.3 Submenu 08 - 03 database ............................................................................................................................................................ 53
7.8.4 Submenu 08 - 04 various settings ................................................................................................................................................. 53
7.8.5 Submenu 08 - 05 outputs test........................................................................................................................................................ 53
7.8.6 Submenu 08 - 06 factory settings ................................................................................................................................................. 53
7.8.7 Submenu 08 - 07 reset partial hours ............................................................................................................................................. 53
7.8.8 Submenu 08 - 08 alarm reset ........................................................................................................................................................ 54
7.8.9 Submenu 08 - 09 counter memories ............................................................................................................................................. 54
7.8.10 Flue gas probe calibration ............................................................................................................................................................. 54

4
General information
1.1 - SYMBOLS USED IN THE MANUAL
Pay special attention when reading this manual to the parts marked by the symbols:
NOTE!
Suggestions for the user
ATTENTION!
Possible hazardous situation
for the product and the environment
DANGER!
Serious danger for
personal safety and life
1.2 - APPROPRIATE USE OF APPLIANCE
The STILE 27 appliance has been built according to the current level of engineering and acknowledged
technical safety rules.
Nonetheless, if improperly used, dangers could arise for the safety and the very life of the user and other
persons or damage to the equipment or other objects.
The appliance is intended to operate in hot air circulation heating systems. Any other use must be
considered improper.
UNICAL shall not be held liable for any damage resulting from improper use; in this case the user is fully
responsible for the risk.
Use according to the intended purposes also includes careful compliance with the instructions in this
manual.
1.3 - WATER TREATMENT (see specific booklet)
•The hardness of the feed water conditions the frequency at which the domestic hot water exchanger must be
cleaned.
•If the water has a hardness greater than 15°f, we recommend using water softeners, chosen according to the
characteristics of the water.
•We recommend checking and cleaning the eventual domestic hot water exchanger at the end of the first year
of use and every two years thereafter.
1.4 - INFORMATION FOR USER
•The user must be instructed concerning the use and operation of his heating system, in particular:
•Deliver these instructions to the user, as well as other documents concerning the appliance inserted in the
envelope contained in the packaging. The user must keep this documentation so that it is available
for further consultation.
•Inform the user about the importance of the air vents and the flue gas exhaust system, highlighting
their essential features and the absolute prohibition of modifying them.
•Inform the user concerning controlling the system’s water pressure as well as operations to restore it.
•Inform the user concerning correct temperature control, control units/thermostats and radiators for saving
energy.
•Remember that the system must receive regular maintenance once a year and a combustion analysis
must be performed in the timetable foreseen by standards in force.
•Should the appliance be sold or transferred to a new owner or if you move and
leave the appliance, always make sure that the instruction booklet accompanies it in order to be
consulted by the new owner and/or installer.
1GENERAL INFORMATION
Attention: this manual contains instructions for the exclusive use of the professionally qualified installer and/or
maintenance technician in compliance with current legislation.
The user is NOT qualified to intervene on the heat stove.
The manufacturer will not be held liable in case of damage to persons, animals or objects resulting from failure to
comply with the instructions contained in the manuals supplied with the heat stove.

General information
5
1.5 - SAFETY WARNINGS
ATTENTION!
The appliance must be installed, adjusted and maintained by professionally qualified personnel, in
compliance with standards and provisions in force. Incorrect installation can cause damage to persons,
animals and objects for which the manufacturer cannot be held responsible.
DANGER!
NEVER attempt performing maintenance or repairs on the heat stove on your own initiative.
Any work must be done by professionally qualified personnel.
We recommend stipulating a maintenance contract.
Insufficient or irregular maintenance can jeopardise the operating safety of the appliance and cause
damage to persons, animals and objects for which the manufacturer cannot be held responsible.
Modifying parts connected to appliance
Do not modify the following parts:
-the heat stove
-the air, water and electricity lines
-the flue gas pipe, safety valve and heating water drain pipe
-construction parts which affect the operating safety of the appliance
Attention!
To tighten or loosen the screwed fittings, use only appropriate fixed spanners.
Incompliant use and/or inappropriate tools can cause damage (e.g. water leakage).
Explosive and easily flammable substances
Do not use or store explosive or easily flammable materials (e.g. petrol, paints, paper) in the room where the
appliance is installed.
1.6 - TECHNICAL DATA PLATE
The technical data plate is adhesive and is applied on the back of the heat stove body.
The serial number of the heat stove is on the riveted plaque on the body (upper left side), visible by removing the top.

6
General information
1.7 - GENERAL WARNINGS
The instruction booklet is an integral and essential part of the
product and must be kept by the user or system manager.
Read the warnings contained in this instruction booklet
carefully as they provide important guidelines regarding
installation, use and maintenance safety.
Keep the booklet with care for further consultation.
Installation and maintenance must be performed in compliance
with standards in force according to the instructions of the
manufacturer and by qualified and certified personnel in
compliance with law.
By professionally qualified personnel we mean: personnel
with specific technical skill in the field of heating system
components for civil use, domestic hot water production and
maintenance. Personnel must have the qualifications provided
for by current legislation.
Incorrect installation or improper maintenance can cause
damage to persons, animals or objects for which the
manufacturer is not responsible.
Before performing any cleaning or maintenance, disconnect
the appliance from the energy mains by acting on the switch
of the system or by unplugging it.
Do not obstruct the terminals of the intake/exhaust ducts.
In case of failure and/or malfunctioning of the appliance, switch
it off and do not try to repair it or intervene on it directly. Contact
only personnel qualified in compliance with law.
Any repairs must be performed solely by personnel
authorised by Unical using original spare parts only. Failure to
comply with the above can jeopardise the safety of the
appliance.
To guarantee appliance efficiency and its correct operation,
yearly maintenance must be performed by qualified
personnel.
Should you decide not to use the appliance, parts entailing
potential sources of hazard must be made safe.
Should the appliance be sold or transferred to a new owner or
if you move and leave the appliance, always make sure that
the instruction booklet accompanies it in order to be consulted
by the new owner and/or installer.
Only original accessories must be used for all appliances with
optionals or kits (including electric).
This appliance is intended solely for the use for which it was
expressly designed. Any other use is to be considered
improper and therefore dangerous.

Technical features and dimensions
7
2.1 - TECHNICAL FEATURES
The heat generator mod. STILE 27 is a steel heating stove
operating with wood pellets with the combustion chamber
under negative pressure.
DESCRIPTION OF COMPONENTS:
•Steel heat stove body
•Refractory steel burner
• Front cleaning door equipped with ceramic glass
•Bottom cleaning door
•Automatic combustion air regulator
•Flue gas passage zone that can be inspected
• Powder painted sheet steel casing
2TECHNICAL FEATURES
AND DIMENSIONS
1. Emergency console *
2. Front cleaning door equipped with ceramic glass
3. Bottom cleaning cover
4. Main switch with plug
5. Remote control reception antenna
6. Room thermostat electric connection
7. Manually reset water safety thermostat
8. Manually reset pellet safety thermostat
T1. CH flow (R 3/4)
T2 CH return (R 1)
T3 Chimney connection (ø100)
T4 Air intake connection (ø80)
T5 Safety valve discharge connection (R 3/4)
* Only switches ON/OFF and performs OUTPUT CHANGE, aside from an LED which signals a generic error.
2.2 - HYDRAULIC DIMENSIONS
AND CONNECTIONS
fig. 1

8
Technical features and dimensions
M Heating system flow
R Heating system return
1 Heating system overpressure valve (2.5 bar) (supplied)
2 Automatic release valve (supplied)
3 Heating system expansion vessel (preloaded at 1 bar) (supplied)
4 System filling tap (not supplied)
5 System shut-off valves (not supplied)
6 Main pump (supplied)
7 System drain tap (not supplied)
Indicative hydraulic diagram
fig. 2
Attention!
The diagram above is indicative and can be customised.
For special requirements, please contact our After-Sales Service.
When installing, check the correct direction of the water flow.

Technical features and dimensions
9
Hydraulic dimensions and connections with DOMESTIC HOT WATER PRODUCTION KIT
1. Emergency console *
2. Front cleaning door equipped with ceramic glass
3. Bottom cleaning cover
4. Main switch with plug
5. Remote control reception antenna
6. Room thermostat electric connection
7. Manually reset water safety thermostat
8. Manually reset pellet safety thermostat
9. Domestic hot water production unit
T1 CH flow (R 3/4)
T2 CH return (R 3/4)
T3 Chimney connection (ø100)
T4 Air intake connection (ø80)
T5 Safety valve discharge connection (R 3/4)
T6 Domestic hot water outlet connection
T7. Domestic cold water inlet connection
* Only switches ON/OFF and performs OUTPUT CHANGE, aside from an LED which signals a generic error.
Note: the support bracket of the domestic hot water production unit can be fastened to the ground with plugs.
The maximum clearance of the domestic hot water production unit from the back of the boiler is indicative as it depends on the
length of the flexible hoses.
fig. 3

10
Technical features and dimensions
Indicative hydraulic diagram
fig. 4
M Heating system flow
F Domestic cold water inlet
C Domestic hot water outlet
R Heating system return
1 Heating system overpressure valve (2.5 bar) (supplied)
2 Automatic release valve (supplied)
3 Heating system expansion vessel (preloaded at 1 bar) (supplied)
4 System filling tap (not supplied)
5 System shut-off valves (not supplied)
6 Main pump (supplied)
7 DHW system shut-off valve (not supplied)
8 Domestic cold water inlet filter (not supplied)
9 Differential flow switch (supplied)
10 Plate heat exchanger (supplied)
11 Diverter valve (supplied)
12 Water hammer prevention system (not supplied)
13 System drain tap (not supplied)
Attention!
The diagram above is indicative and can be customised.
For special requirements, please contact our After-Sales Service.
When installing, check the correct direction of the water flow.