Schmid UTSR 180 User manual

Schmid AG
energy solutions
Hörnlistrasse 12
8360 Eschlikon
Switzerland
www.schmid-energy.ch
Operating instructions
Translation of the original German version
Version 1.8 en, 20.01.2022
DUTSR moving grate combustion
system
Series, Type: UTSR-
Fabrication number: See nameplate
System name:
Year of manufacture: 2022

UTSR moving grate combustion system
1.8 en
D-2
Table of Contents
1 Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-6
1.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-6
1.1.1 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-6
1.1.2 Combustion grate and boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-7
1.2 Reasonably foreseeable misuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-7
1.3 Residual risks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-8
1.3.1 Danger when entering the combustion chamber. . . . . . . . . . . . . . . . . . . . . . . .D-9
1.4 Warning signs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-10
1.5 Emergency shut down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-12
1.6 Environmental impact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-12
1.7 Ambient conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-12
1.7.1 Combustion air supply to the heating room . . . . . . . . . . . . . . . . . . . . . . . . . . .D-13
1.7.2 Ambient temperature in the heating room . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-13
1.7.3 Installing the combustion system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-13
1.8 Safety and monitoring systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-14
1.8.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-14
1.8.2 Thermal extinguishing water valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-15
1.8.3 O2 sensor (lambda sensor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-16
1.8.4 Emergency stop button and maintenance switch for drive motors . . . . . . . .D-16
1.9 Operator workstations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-17
2 Description UTSR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-19
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-19
2.2 Heat storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-20
2.3 Description of functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-21
2.4 Design of the moving grate combustion system . . . . . . . . . . . . . . . . . . . . . . .D-24
2.4.1 Automatic boiler tube cleaning (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-26
2.4.2 Automatic ignition (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-27
2.4.3 Automatic radiation-vault cleaning system (optional) . . . . . . . . . . . . . . . . . . .D-27
2.4.4 Temperature safety valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-28
2.4.5 Flue gas recovery (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-30
2.4.6 Under-grate de-ashing (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-31
2.4.7 Economiser (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-31
2.4.8 Flue gas filter system (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-32
2.5 Nomenclature key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-32

UTSR moving grate combustion system
1.8 en D-3
2.6 Inlet design variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-33
2.7 Structure of the combustion system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-33
2.8 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34
2.8.1 Dimensions (subject to technical changes) . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34
2.8.2 Connection sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-36
2.8.3 Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-37
2.8.4 Planning values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-38
3 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-43
3.1 Lifting loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-45
4 Installation, commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-46
4.1 Installation, assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-46
4.2 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-47
4.2.1 Requirements for circulating water up to 110° . . . . . . . . . . . . . . . . . . . . . . . . D-48
4.2.2 Water treatment for different types of raw water . . . . . . . . . . . . . . . . . . . . . . D-48
4.2.3 Technical safety equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-48
4.2.4 Filling with circulation water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-48
4.3 Heating the combustion chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-49
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-50
5.1 General instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-50
5.1.1 System operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-51
5.2 Switching the combustion system on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-52
5.2.1 Correct manual lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-53
5.3 Emergency shut down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-54
5.4 Operating and display elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-54
5.4.1 Mains disconnection devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-54
5.4.2 Machine control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-54
5.4.3 Operating mode selector switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-54
5.5 Recommissioning after a longer interruption . . . . . . . . . . . . . . . . . . . . . . . . . D-55
6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-56
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-56
6.2 Maintenance contract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-56
6.3 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-57

UTSR moving grate combustion system
1.8 en
D-4
6.3.1 Clean boiler passes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-58
6.3.2 Clean upper vault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-59
6.3.3 Clean ash removal box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-60
6.3.4 Clean fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-60
6.3.5 Clean lower vault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-61
6.3.6 Clean the moving grate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-62
6.3.7 Clean lower grate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-62
6.4 Maintenance overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-63
6.5 Maintenance tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-67
6.5.1 Emissions control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-67
6.5.2 Clean the O2 sensor (lambda sensor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-67
6.5.3 Check the doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-67
6.5.4 Maintenance work on components with drive units . . . . . . . . . . . . . . . . . . . .D-68
6.5.5 Dangers resulting from flue gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-68
6.5.6 Oil hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-69
6.5.7 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-71
7 Disassembly and disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-73
7.1 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-73
7.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-73
8 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-74
8.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-74
8.2 How to order spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-74
8.3 UTSR moving grate combustion system . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-75
8.3.1 UTSR 180-240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-76
8.3.2 UTSR 300-360 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-77
8.3.3 UTSR 450-550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-78
8.3.4 UTSR 700-900 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-79
8.3.5 UTSR 1200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-81
8.3.6 UTSR 1600 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-82
8.3.7 UTSR 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-83
8.3.8 UTSR 2400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-85
8.3.9 UTSR 3200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-86
8.3.10 UTSR 4200 - 6500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-87
8.4 Automatic boiler tube cleaning unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-88
8.5 Automatic ignition unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-90
8.6 Back fire protection BRA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-91
8.7 Flue gas recovery (recirculation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-92

UTSR moving grate combustion system
1.8 en D-5

UTSR moving grate combustion system
1.8 en
D-6
1 Safety instructions
1 Safety instructions
1.1 Intended use
The moving grate combustion system is intended solely for the combustion of the
contractually specified fuels as bulk materials. This is clearly stated in the order confir-
mation of Schmid AG energy solutions and in the system overview. Any other use, or
the use of any other fuels is considered contrary to the intended use. The manufacturer
is not liable for any damage resulting from such use. The user alone bears the risk of
such unintended use.
1.1.1 Fuel
The fuel specifications are defined during system project design. It is recommended to
operate the combustion system with fuel of the quality listed in section 2.8.4.
Thesystemis not intendedforcombustionof any fuel otherthanvirginwood or residual
wood from the wood processing industry. Other fuels, such as waste wood, contami-
nated wood waste, etc. do not conform to the intended use of the system and can result
in damage to the system, such as corrosion, mechanical defects, and environmental
damage (e.g. emissions of heavy metals).
Special fuels must be coordinated with Schmid AG energy solutions. Furthermore, the
system must always be operated in conformity with applicable air quality laws.
The defined fuels according to the order confirmation and project design must be
complied with.
The introduction of any foreign objects, such as stones, nails, soil, and metal objects
may result in severe damage to the transport assemblies and combustion system.
Never under any circumstances exceed the specified moisture content of the fuel.
Excessive moisture content will result in improper combustion. If moisture content is
too high, the combustion temperature will not reach the proper level, causing exces-
sive flue gas emissions. There is also a risk that the combustion system will become
over-filled, smothering combustion.
Failure to adhere to these guidelines voids the warranty on system parts, mechanics
and emissions.

UTSR moving grate combustion system
1.8 en D-7
1 Safety instructions
1.1.2 Combustion grate and boiler
Also refer to «2.8.4 Planning values» of the UTSR series.
This applies to the following values in particular:
• Nominal heat capacity (kW)
• Heat capacity range (kW)
• Permissible operating pressure (bar)
• Maximum permissible operating temperature (°C)
• Maximum flow temperature (°C)
To prevent corrosion damage on the boiler resulting from condensation, the minimum
return line temperature in the boiler (boiler admission temperature) must be main-
tained. The system must be operated in conjunction with a return temperature
controller.
1.2 Reasonably foreseeable misuse
Any use not inconformity with the specified "intended use" or any use beyond such use
shall be considered a violation of the intended use of the system and is prohibited. Any
other use must be coordinated with the manufacturer.
Modifications and changes:
Anymodificationsor changestothemachineryundertakenindependentlyshall void the
liability and warranty of the manufacturer.
Spare parts, wear parts and auxiliary materials:
Use of spare parts or wear parts from other manufacturers can involve risk. Use only
original or manufacturer-approved parts.
The values specified on the nameplate must be adhered to.
Failure to adhere to these specifications voids the warranty on system parts,
mechanics and guaranteed emissions.

UTSR moving grate combustion system
1.8 en
D-8
1 Safety instructions
1.3 Residual risks
The machine is built to the state of the art and in conformity withrecognized safety stan-
dards. The following residual risks exist and should be kept in mind when operating the
machinery.Residual risksassociatedwithspecificphasesoftheservicelife ofthesystem
are detailed in the corresponding chapters of these instructions.
The system may only be operated in good condition.
i DANGER!
When working on live electrical parts, there is the risk of death, serious injury and
damage to equipment.
Switch off the machinery/system in the event of a fault in the power supply.
If work is necessary on voltage-carrying parts, the system must be disconnected from
the mains with the master switch. The master switchmust be secured against accidental
activation (e.g. with a personal padlock).
Only professional electricians should perform work on electrical systems and operating
media.
Never remove any covers. The door of the control cabinet must be kept closed at all
times.
i WARNING!
High flue gas concentrations in the air can result in unconsciousness and the risk of suf-
focation.
Take the following precautions before working on the flue gas system:
Ensure that the combustionsystem has been stopped and that no flue gases are coming
from the combustion system.
Ensure that the flue gas system has cooled down.
Ensure adequate ventilation.
Ensure that the combustion system is secured against unauthorised operation.
Operation without a connection to the flue gas pipes is prohibited.
Always close cleaning openings after cleaning.
i WARNING!
There is a risk of falling when climbing on the system. Never climb on the system.
Do not use system parts for climbing. Wear fall-protection equipment during mainte-
nance work at high elevations.
During work at heights of more than 1.8 m (6'), use safe climbing equipment or work
platforms.

UTSR moving grate combustion system
1.8 en D-9
1 Safety instructions
1.3.1 Danger when entering the combustion chamber.
i DANGER!
Risk of explosion (deflagration)!
Risk of flame exposure when opening the combustion chamber door!
In the event of faulty pre-ventilation or incomplete combustion, an explosive atmo-
sphere can occur in the combustion chamber due to the formation of carbon monoxide
(CO). This can ignite when the burner is repeatedly started, when the combustion cham-
ber or maintenance doors are opened and cause deflagration. This can result in death,
serious injury or damage to equipment.
Before lighting the fuel, close all maintenance doors. Lighting may only be performed
manually through the combustion chamber door.
Never open the combustion chamberdoor after lighting the fuel or during the automatic
lighting procedure.
It is prohibited to open the combustion chamber door during start-up and operation as
well as after shutdown for faster cooling.
The combustion chamber door and the maintenance doors may only be reopened after
pre-ventilation, especially after a power failure.
It is prohibited to bridge safety switches.
i WARNING!
Obstruction of the respiratory tracts by dust!
Dust, ash and fly ash from the multi-cyclone or electrostatic precipitator can negatively
affect breathing.
In the event of high dust concentrations (especially from the ash from the multi-cyclone
or electrostatic precipitator), respiratory protection of class P3 or FFP3 must be worn.
Caution! Respirator masks for fine dust do not provide protection against hazardous or
suffocating gases and vapours.
i WARNING!
Danger from heat and hot surfaces!
The combustion chamber, combustion chamber and maintenance doors, fuel supply
and flue gas pipes can be hot.
Do not touch during operation. Wear gloves and protective gear.
i WARNING!
Risk of injury when entering the combustion chamber. Always secure the combustion
chamber door.
Before entering the combustion chamber always secure the combustion chamber door
with the personal padlock.

UTSR moving grate combustion system
1.8 en
D-10
1 Safety instructions
1.4 Warning signs
i WARNING!
Risk of injury due to rotating parts.
Before entering the combustion chamber, switch off the grate de-ashing screw on the
maintenance switch and secure with the personal padlock to prevent reactivation.
Sign below the main switch of the electri-
cal circuit cabinet
• 5 safety regulations must be complied
with when working on the electrical
system.
Sign next to maintenance access points in
the flue gas path and undergrate doors
• Before opening, the combustion sys-
tem must have cooled and the flue gas
path must be sufficiently purged.
Sign next to service openings
• Before opening, shut down the system
and secure with the personal padlock.
Sign near the under-grate door.
• Never open the under-grate door
during operation. Work-free zone –
keep free during operation.
2000.8407
RISK OF FATAL ELECTRIC SHOCK
5 compulsory safety rules for working
with electrical equipment:
ƔSwitch off the power and disconnect
mains.
ƔLock against reclosure.
ƔCheck the absence of voltage.
ƔGround and short circuit.
Ɣ
Protect against neighbouring, live parts.
RISK OF SUFFOCATION /
RISK OF EXPLOSION
Before opening the maintenance
door, the combustion system must
be cooled down and the flue gas
system fully ventilated.
2000.8411
AUTOMATIC START-UP!
Before opening, shut down the
system and secure against restart
with the personal padlock.
2000.7369
Do not open the furnace door
during start-up and ignition!
DANGER OF EXPLOSION/
DEFLAGRATION!
Endangered area - keep clear
during operation.
2000.7377

UTSR moving grate combustion system
1.8 en D-11
1 Safety instructions
Missing or unreadable pictograms must be replaced.
Sign next to combustion chamber door
• Do not open during start-lighting pro-
cedure
Sign next to access door to fuel storage
room
• Caution fermentation gas choking haz-
ard
• Lights red / green (permanent) for ac-
cess control
• Coupled with the light (the fan switch-
es on automatically when the light is
switched on)
Sign next to the hot maintenance open-
ings
• Do not open during operation
Designates a maintenance zone. This
should never be blocked by installations
such as electrical cables or water pipes etc.
Designates the position of a covered main-
tenance opening.
DANGER OF EXPLOSION/
DEFLAGRATION!
Do not open the furnace door
during start-up and ignition!
FIRE HAZARD/
RADIANT HEAT!
Only open the furnace door briefly
and never leave unsupervised.
HOT SURFACES!
Always wear full protection gear
(gloves, goggles, long-sleeved
cotton garments).
SECURE FURNACE DOOR!
Secure furnace door with the per-
sonal padlock before entering the
furnace.
ROTATING ELEMENTS!
Before entering the furnace, secure
the grate de-ashing screw against
reactivation with the personal padlock.
2000.7365
FERMENTATION GAS -
RISK OF SUFFOCATION!
Ventilate the room before
entering!
2000.7373
HOT SURFACES!
2000.7389
Always wear full protection gear
(gloves, goggles, long-sleeved
cotton garments).
Maintenance area - please
keep clear!
2000.7385
Maintenance opening behind
the cover!
2000.7381

UTSR moving grate combustion system
1.8 en
D-12
1 Safety instructions
1.5 Emergency shut down
Themovementofthewoodcombustion systemcan bestoppedatanytime byactivating
the emergency stop button.
Opening the combustion chamber door or the boiler door stops the movement of the
system. Exception: the flue gas fan continues to run.
Removal of the ash container stops the movement ofall of the ash removal components.
The emergency cut-off does not immediately stop the combustion process in the
combustion system. The fire continues to burn for a long time (Read
chapter«1.3 Residual risks»).
1.6 Environmental impact
When operated properly, this wood combustion system fulfils the requirements of the
Swiss air quality act LRV 92 and Germany's Federal Emissions Act (BImSchG).
Wood fuel is carbon neutral and there are no risks associated with its transport and
storage, apart from the development of fermentation gases in storage. The use of wood
fuel, therefore, makes sense from an ecological perspective and protects the environ-
ment.
The operator must arrange for the disposal of ash through the responsible authorities.
1.7 Ambient conditions
i DANGER!
Flue gas inhalation hazard!
Lack of air in the boiler room can result in unconsciousness and severe injury to the cen-
tral nervous system.
In the heating room theconditions given in Sections «1.7.1 Combustion air supply to the
heating room» and «1.7.2 Ambient temperature in theheating room» must be complied
with.

UTSR moving grate combustion system
1.8 en D-13
1 Safety instructions
1.7.1 Combustion air supply to the heating room
Depending on the desired capacity, a certain air flow rate is necessary for wood combus-
tion (combustion air).
The size of the openings is determined during planning in accordance with the valid
local directives (e.g. VKF Directive).
Calculation of the combustion air opening in compliance with VKF:
10.3 x boiler capacity (kW) = free cross-section in cm2
Should forced ventilation (electronically controlled mechanical flaps/fans) be used for
the supply of combustion air, it must be ensured at all times that the required combus-
tion air is available during operation of the system. The valid standards, directives and
regulations such as VKF etc. must be complied with. In addition, it must be ensured
when the boiler has been switched off that combustion air flows into the heating room
for at least 5 hours (systems up to 250 kW) or 10 hours (systems above 250 kW). There
should never be any overpressure (max. +5 Pa in relation to the ambient air pressure) or
underpressure (max. -5 Pa in relation to the ambient air pressure) in the heating room.
Never cover or close the air supply vents in the boiler room under any circumstances.
Doing so will cause the combustion system to operate with an inadequate supply of air.
1.7.2 Ambient temperature in the heating room
The ambient temperature in the heating room of +10°C to max. +35°C must be complied
with.
1.7.3 Installing the combustion system
With regard to the design of the heating room, the respective local building regulations,
the applicable standards and fire regulations as well as the fire protection regulations
are decisive. It is not permitted to place the combustion system on a wooden floor or
combustible surface. Observe the respective regulations regarding fire protection as
well as the valid regulations on accident protection and accident prevention. Ensure
sufficient lighting at the installation site.

UTSR moving grate combustion system
1.8 en
D-14
1 Safety instructions
1.8 Safety and monitoring systems
1.8.1 Overview
(In compliance with EN 303-5:2012)
Fig. 1 Safety and monitoring systems
The detailed description of the error messages is given in Register "C User manual,
Control unit", section "11 Events".
Item Description Function
1 Back fire thermostat
(1 with rotary valve,
1.1withbackfireprotectionslide)
In the event of a backfire, switches off the
combustion system and generates an alarm.
2 Thermal extinguishing water
valve with sensor Turns on extinguishing water supply in the event of a backfire in the stoker screw.
3 Safety thermostat Switches off the combustion system in the
event of excess temperature and generates an
alarm.
4 Limit switch, boiler door Switchesoffthecombustionsystemiftheboiler
door is opened and generates an alarm.
5 Limit switch, grate door Only allows the grate door to be opened when
the“Opencombustionchamberdoor”buttonis
pressed.
6 Rotary valve or back fire
protection slide Separates the fuel supply from the combustion chamber.
7O
2sensor (lambda sensor) Measures the oxygen content in the flue gas,
installationin thefluegas connectionorthe flue
gas fan
1
2
6
3
7
4
5
1.1

UTSR moving grate combustion system
1.8 en D-15
1 Safety instructions
1.8.2 Thermal extinguishing water valve
The sprinkler connection is equipped with a thermal valve with sensor (electrically
decoupled) and installed directly on the stoker. If the temperature in the stoker exceeds
65°C, the extinguishing water valve automatically opens and the back fire is extin-
guished. The extinguishing water valve closes automatically once the temperature
drops.
Annual function checks must be carried out on the back fire thermostat, the thermal
extinguishing water valve, the safety temperature limiter, the O2sensor as well as on
the rotary valve. This inspection work may only be carried out by service personnel of
Schmid AG energy solutions.
Item Designation
1 Thermal valve
2 Contact sensor
Minimum water pressure 3 bar
Minimum water supply line ½"
12
A water supply must be ensured at all times. If a stop cock is installed, it must always
be open. If necessary, the hand cock on the shut-off valve should be removed to
prevent anybody from interrupting the water supply.
A drinking water separator must be installed in the extinguishing water supply in
compliance with specific national regulations.
An annual functional check must be carried out on the thermal extinguishing water
valve. This inspection work may only be carried out by service personnel of Schmid
AG energy solutions.

UTSR moving grate combustion system
1.8 en
D-16
1 Safety instructions
1.8.3 O2sensor (lambda sensor)
The O2sensor is a sensor that measures the residual oxygen content in the flue gas. The
signal of the O2sensor can affect the combustion air or the fuel quantity.
The O2sensor must be removed before cleaning the flue gas connection or the flue gas
fan.
Clean with a soft cloth or blow off with compressed air. When blowing off maintain a
distance of 20cm to prevent damage to the sensor.
1.8.4 Emergency stop button and maintenance switch for drive mo-
tors
Position emergency stop buttons:
The customer can provide emergency stop buttons on the access doors and escape
routes to the heating room that can be integrated into the control cabinet front. Actu-
atingtheemergencystopbuttonstopsthe systemcontrolled by SchmidAG energy solu-
tions.
Position of the maintenance switches to the electrical drive motors:
Immediatelynear the corresponding gear motors. When carryingoutmaintenancework
on the drive motor or the corresponding display element, actuate the maintenance
switch and secure against unauthorised activation.
Operationofthesystemwithdefectivetechnicalsafetycontroldevicesisprohibited.The
device status must be checked daily and the function of the devices must be checked
every six months. Defective devices must be replaced and not bridged.
i WARNING!
Risk of burns, the O2sensor is hot.
Before removal check the temperature of the O2 sensors, always wear gloves during
work.

UTSR moving grate combustion system
1.8 en D-17
1 Safety instructions
1.9 Operator workstations
Access to the system must be possible on all sides for the following tasks:
• General operation
• Fire monitoring
• Flue gas duct cleaning and flue gas recovery
• Cleaning of the combustion chamber
• Maintenance work in the area of the fuel and air intake areas
• Disposal of ash
• Clearance area of the boiler door
Fig. 2 Workstation
(x): This work area can be reduced after consultation.
Capacity (kW), in compliance with
EN 303-5 A (mm) B (mm) C (mm) D (mm)
180 1600 1150 2620 1200
240 1600 1150 2620 1200
300 1800 1250 2670 1250
360 1800 1250 2670 1250
450 2300 1440 2920 1300
500 2300 1440 2920 1300
550 2300 1440 2920 1300
700 2700 1800 3570 1600
900 2700 1800 3570 1600
995 3000 2000 4100 1800
800 B
A A + 200mm
800 [x]
BC
D
800 [x]

UTSR moving grate combustion system
1.8 en
D-18
1 Safety instructions
1200 3000 2000 4100 1800
1600 3400 2000 4150 1850
2000 3800 2320 5050 2050
2400 4400 2320 5050 2050
3200 4800 2800 6800 2700
4200 5980 2800 7050 2750
5000 7200 2800 8150 2750
6500 7360 3200 9330 3930
Capacity (kW), in compliance with
EN 303-5 A (mm) B (mm) C (mm) D (mm)

UTSR moving grate combustion system
1.8 en D-19
2 Description UTSR
2 Description UTSR
2.1 Introduction
This automatic moving grate combustion system is designed for economical and low-
emission combustion of forest woodchips and pellets. The energy released by combus-
tion is used thermally.
Depending on the heat requirements, the combustion system adjusts its capacity within
a range of 30 to 100 percent. Depending on the required capacity, the air and fuel quan-
tities are adjusted automatically. The fuel quantity is controlled depending on the
combustion temperature by varying the running time of the dosing screw. The stoker
screw transports the dosed fuel onto the combustion grate. A rotary valve is installed
upstream from the stoker to protect it against backfire. In addition an extinguishing
water supply is connected with a non-electrical, thermostatically actuated valve and a
thermostat with an electrical switching contact on the stoker inlet.
The fuel supplied with the stoker screw runs through the necessary phases required for
optimumcombustion-drying,gasification(pyrolysis),combustion(oxidation)aswellas
the charcoal burnout on the flat moving grate and in the combustion chamber. The flat
grate cooled with the primary air is constructed of cast ribs arranged in rows. Each
second cast rib row is controlled by a joint hydraulic drive and transports the fuel or the
combustion residues to the grate de-ashing screw. Four different air supplies are
provided for controlling the combustion process. Two primary air zones below the grate
for drying, gasification and burnout as well as two secondary air zones in the combus-
tionchamberfor combustionofthegases. The combustionprocessismonitoredbyfour
air flow measurements inthe primary and secondary air ducts, thecombustion tempera-
ture as well as the O2sensor/excess air measurement. The secondary air injection 1 is
effected from three sides, offset by 90° in the upper part of the combustion chamber to
achieve optimum mixture of the wood gases with the combustion air and therefore full
burnout with low CO values. The secondary air 2 is injected above the vault in the
burnout zone. This construction complies with the low NOx process with air stages. The
combustion chamber is lined with fireproof concrete on the combustion chamber side,
on the one hand to protect the steel construction, on the other for storing the tempera-
ture required for optimum combustion. The vault ceilings comprise shaped stones and
serve to efficiently dry the fuel and protect the flame tube of the boiler. The combustion
chamber is air cooled to minimise the radiation losses, protect personnel and prevent
physical contact; theentire combustion system is insulated with a 100 mm thick layer of
insulation mats and cladwith a powder-coated metal sheet. At the same time air cooling
serves to pre-heat the secondary combustion air.
The heat energy in the hot flue gas is transferred to the water in the downstream boiler.
The colder return line of the heating system is routed at the lower side of the boiler. The
warm supply is discharged at the top side. To boost the efficiency, turbulators made of
stainless metal sheets are inserted into the boiler tube passes. The boiler is positioned
directly on the combustion chamber and insulated with insulation mats. If the heat
discharge fails, the boiler is cooled by a heat exchanger coil supplied with mains water.
The mains water is supplied with a non-electrically powered, thermostatically actuated
valve.
Thesolidsformed during combustionflowwiththe hotfluegasthroughthe boiler. After-
wards the particles are separated in a multi-cyclone that runs in accordance with the
centrifugal force principle. The multi-cyclone is mounted compactly on the boiler and
also insulated as a unit with the combustion grate / boiler and integrated into the sheet
metal cladding.

UTSR moving grate combustion system
1.8 en
D-20
2 Description UTSR
To lower dust emissions even further, the gases can be additionally cleaned by a down-
stream filter system. The flue gas fan is installed in accordance with the filter type on the
inlet or outlet side of the filter.
The flue gas fan draws off the combustion gases through the boiler and the multi-
cyclone and transfers theseto the flue gas pipe that leads to the stack. An underpressure
measurement system combined with an electronic control unit regulates the speed of
the fan to ensure the underpressure required in the combustion chamber.
Fig. 3 Cross-section of the moving grate combustion system
2.2 Heat storage
The locally applicable regulations for the design of the heat storage system for auto-
matic wood boilers must be observed.
In Switzerland, according to the Swiss Ordinance on Air Pollution Control (LRV) Annex
3, Section 523, automatic wood boilers with a nominal heat capacity of up to 500 kW
must be equipped with a heat storage tank with a volume of at least 25 litres per kW of
the nominal heat capacity.
Schmid AG generally recommends installing a minimum heat storage volume of 30
litres per kW of the nominal heat capacity of the largest boiler, regardless of the boiler
size.