elco THISION EVO WH Series Specification sheet

Operation and Installation manual
THISION EVO WH
08/2016PAG THEWH01

Contents
Contents .................................................................. 3
General regulations................................... 5
Application................................................. 5
Norms and regulations.............................. 5
Construction Layout of water heater............................... 7
Operating principle.................................... 7
Technical data ................................................................. 10
Water heater Installation.......................... 12
Connecting thewater heater .................... 12
Commissioning Water and hydraulic system...................... 17
Gas supply................................................ 18
........................... 18
Flue and air intakeconnections................. 18
Prepare water heater for first startup........ 19
Combustion analysis................................. 20
........... 21
Gas tightness check.................................. 21
Water heater shut down............................ 21
Maintenance Checklist.................................................... 25
Replacing the electrodes........................... 25
Cleaning the condensatereceptacle......... 26
Cleaning and refillingthe syphon .............. 26
Inspection of the combustion chamber...... 26
Water pressure andquality ....................... 27
Combustion analysis................................. 27
Gas pressure............................................. 27
Gas tightness check.................................. 27
Safety devices........................................... 27
Maintenance Protocol................................. 28
Lockouts .................................................................. 22
Safety Provisions...................................... 6
Thision WH principle................................. 7
Unvented Applications .............................. 14
Cylinder diagnosis & controls.................... 19
Commissionign protocol............................. 29
3
Condensate connections
Check functionality of safety devices
Cylinder venting ......................................... 17

Safety
General regulations
Application
Norms and regulations
5
General regulations
This documentation contains important
information, which is a base for safe
and reliable installation, commissioning
and operation of the THISION L boiler.
All activities described in this document
may only be excecuted by authorized
companies.
Changes to this document may be ef-
fected without prior notice. We accept
no obligation to adapt previously deliv-
ered products to incorporate such
changes.
Only original spareparts may be used
when replacing components on the
boiler, otherwise warranty will be void.
Application
The THISION water heater may be
used for hot water production purpo-
sesonly.
Norms and regulations
When installing and operating the
boiler, allapplicable norms (european
and local) should be fulfilled:
Local building regulations for install-
ing combustion air and flue gas sys-
tems;
Regulation for connecting the water
heater to the electrical appliance;
Regulations for connecting the water
heater to the local gas network;
Norms and regulations according to
safety equipment for heating systems;
Any additional local laws/regulations
with regard to installing and operating
heating systems.
The THISION L boiler is CE approved
and applies to the following Euro-
pean standards:
92 / 42 / EEC
Boiler efficiency directive
2009 / 142 / EEC
Gas appliance directive
2006 / 95 / EEC
Low voltage directive
2004 / 108 / EEC
EMC directive
EN 483
Gas-fired central heating boilers -
Type C boilers of nominal heat input
notexceeding 70 kW
EN 15420
Gas-fired central heating boilers -
Type C boilers of nominal heat input
exceeding 70 kW, but not exceeding
1000 kW
EN 15417
Gas-fired central heating boilers -
Specific requirements for condensing
boilers with a nominal heat input
greater than 70 kW but not exceeding
1000 kW
EN 50165
Electrical equipment of non-electric
appliances for householdand similar
purposes - Safety requirements
EN 15502-1
Gas-fired central heating boilers -
Part 1: General requirements and
tests
EN 55014-1 (2000)
Electromagnetic compatibility - Re-
quirements for householdappliances,
electric tools and similar apparatus -
Part 1: Emission
EN 55014-2 (1997)
Electromagnetic compatibility - Re-
quirements for householdappliances,
electric tools and similar apparatus -
Part 2: Immunity - Product family
standard
EN 61000-3-2 (2000)
Electromagnetic compatibility (EMC) -
Part 3-2: Limits - Limits for harmonic
current emissions (equipment input
current 16 A per phase)
EN 61000-3-3 (2001)
Electromagnetic compatibility (EMC) -
Part 3-3: Limitation of voltage
changes, voltage fluctuations and
flicker in public low-voltage supply
systems, for equipment with rated
current 16 A per phase and not sub-
ject to conditional connection
EN 60335-1 (2002)
Household and similar electrical appli-
ances - Safety - Part 1: General re-
quirements
EN 60335-2-102 (2006)
Household an similarelectrical
appliances: Particular requirements
for gas, oil and solid-fuel burning ap-
plianceshaving electrical connections

Safety Provisions
Conditions
It is a statutory requirement that all gas appliances areinstalled in accordancewith the manufactures instructions and
all current regulations in force, all instructions should be fully read before installing or using the appliance.
All installations should be carried out by competent persons as described in the Gas Safety (Installation & Use)
Regulations. i.e. GasSafe registered and holding current certification.
The work must be carried out by a competent person as described in the I.S. 813 Domestic Gas Installations with
reference to the following codes of practices.
The Manufacturers instructions MUST NOT be taken in any way as overriding statutory obligations.
Thisboiler hasbeen tested andcertified to complywith all necessaryEuropean directives and is CE marked andcomplies
with:
92/42/EEC Efficiency of Hot Water Boilers Directive
90/396/EEC Gas Appliance Directive
93/68/EEC Low Voltage Directive (was 73/23)
92/31/EEC Electromagnetic compatibility Directive
I.S. 813 Domestic Gas Installations
The THISION EVO WH should be installed in compliance with
The Building Regulations (Scotland-consolidated)
BuildingRegulations (Northern Ireland)
BuildingRegulations
Water fittings regulations or water bylaws in Scotland
Local water company bylaws
The boiler should not be modified in any way. Any modifications will invalidate the gas approval and invalidate the
warranty.
ATTENTION: High Voltage
Before opening the boiler casing for maintenance or servicing the 230VAC main supply to the boiler must be
disconnected!!
5
6

4
3
1
2
11
6
7
9
8
10
5
16
12
18
17
14 13
15
Construcon
GB
7
Layout of the boiler
Operang principle
Layout of boiler
The THISION L EVO boiler consists of
the following main components:
1. Casing
2. Access door to control panel
3. Flue gas connecon
(+ test point)
4. Air intake connecon
(+ test point)
5. Flow water connecon
6. Return water connecon
7. Gas connecon
8. Syphon
9. Input for wiring
10. Connecon for safety valve
11. Connecon for fill/drain valve
12. Control Panel
13. Fan
14. Gas valve
15. Ignion and ionisaon electrodes
16. Heat exchanger
17. Ignion transformer
18. Electrical input connecons
Operang principle
The THISION L EVO is a fully modu-
lang boiler.
The control unit of the boiler adapts
the modulaon rao automacally
to the heat demand requested by
the system. This is done by control-
ling the speed of the fan. As a re-
sult, the venturi mixing system will
adapt the gas rao to the chosen fan
speed, in order to maintain the best
possible combuson figures and
therewith the best efficiency.
The flue gases created by the com-
buson are transported downwards
through the heat exchanger and
leave the boiler at the top into the
chimney connecon.
The return water from the system
enters the boiler in the lower sec-
on, where is the lowest flue gas
temperature in the boiler.
In this secon condensaon takes
place. The water is being transport-
ed upwards through the heat ex-
changer, in order to leave the boiler
at the flow connecon. The cross
flow working principle (water up,
flue gas down) ensures the most ef-
ficient combuson results.
The LMS14 control unit can control
the boiler operaon based on:
• Boiler control
(stand alone operaon);
• weather compensated operaon
(with oponal outdoor sensor);
• with 0-10V external influence (tem-
perature or capacity) from a build-
ing management system.

Hydraulic System Diagram
Caution!
The capacity of the built in water recirculation pump is
600 l/hr at the 20 kPa setting. The maximum loss of the
flow and recirculation system occurs at 65°C flow and
60°C return (3.kw). A greater loss will cause a lower
return temperature and therefore a longer loading
period.
T3
T5
T1
T4
P1
P3 P2
T2
Legend:
P1: Loading Pump
P2: DHWS Recirculation Pump
P3: Boiler Pump
T1: Buffer tank upper temperature
T2: Loading temperature
T3: Shut down temperature
T4: DHWS recirculation temperature
T5: Buffer tank lower temperature
Thision EVO WH
Plan View of two ThisionEVO WH Units in parallel
The Thision EVO WH has been designed for ease of
installation. For the unit to provide DHW a minimum of the
following is required to be installed from the system to the unit:
1. 230Vac electrical supply
2. Mains cold water supply
3. DHWS secondary flow pipework
4. DHWS secondary return pipework
5. Gas supply pipework
6. Condense drain pipework
7. Flue gas outlet & Air intake pipework
8
Thision WH
The Thision EVO WH is a standalone DHW charging system that
consists of a buffer tank, plate heatexchanger and a boiler.
The System is suitable for use in any building with
medium to large water usage, such as swimming pools,
gyms , sports clubs, fitness centres etc.
Installing 2 Thision EVO WH in parallel
The Thision EVO WH is a standalone unit that functions
exceptionally. Where there is a high demand for hot water there
is an option to connect two units together in parallel. It is
essential that the units are connected such that flow is distributed
evenly through both units
Ensure that pipework is equal from both units to the
secondary flow and secondary return connection.
Thision EVO WH

Technical data
9
THISION EVO
70 120
Nominal heat output at 80-60ºC max/min kW 65.5/15.6 111.9/22.5
Nominal heat input Hi max/min kW 66.8/16.0 114.3/22.9
Efficiency at 80/60ºC % 97.4 97.9
Standstill losses W81.0 92.7
Max. condensate flow l/h 4.46.4
Gas consumption G20 max/min (10,9 kWh/m3)m3/h 6.1/1.510.5/2.1
Gas consumption LPG. max/min (12,8 kWh/kg) kg/h 5.2/1.38.9/1.8
Gas pressure G20 mbar 20 20
25 25
Gas pressure LPG mbar 30/50 30/50
Maximum gas pressure mbar 50 50
Flue gas temperature at 80/60ºC max/min ºC 60/57 63/56
Flue gas quantity max/min m3/h 98/22 168/33
CO2level natural gas max/min % 8.4/9.0 8.4/8.5
CO2level liguid gas LPG max/min % 9.6/9.6 9.6/9.6
NOx level mg/kWh 39 39
CO level max/min mg/kWh 99/11 88/5
Max. permissible flue resistance Pa 244 134
Water volume l 6.0 9.0
Water pressure max/min boiler module bar 8/1 8/1
Max. water temperature (High limit thermostat) ºC 100 100
Maximum temperature setpoint ºC 90 90
3.4 4.8
Electrical connection V 230 230
Frequency Hz 50 50
Mains connection fuse A 10 10
IP class - IPX4D IPX4D
Power consumption boiler max/min (excl. pump) W 122 119
Weight (dry) with 250L cylinder
Noise level at 1 meter distance dB(A) 55 57
-
Gas connection - R3/4" R1"
Flue gas connection mm 100 100
Air intake connection (for room sealed use) mm 100 100
Condensate connection mm 22 22
CE-0063CM3576
kg
CE certification code
PH value condensate - 3.2 3.2
Weight (dry) with 500L cylinder kg 187.8 203.7
197.8 213.7
Weight (wet) with 250L cylinder kg
Weight (wet) with 500L cylinder kg 437.8 453.7
697.8 713.7
THISION EVO

Technical data
70 THISION EVO
120
10 min peak output at 60ºC (250L storage)
L 437 568
L 1372 2163
THISION EVO
1st hour continous output at 60ºC (250L storage)
Continuous operation at 60ºC
1st hour continous output at 60ºC (500L storage)
10 min peak output at 60ºC (500L storage) L 687 818
L 1622 2413
L 1122 1913
10
Electrical Data
Maximum Power Consumption
Electrical Supply
Fuse Rating
W
A
397 458
V
Frequency Hz 50 50
230 230
DHW Performance Data
10
10

Technical data
Dimensions
W mm
B1 mm
B2 mm
D mm
H mm
C1 BSP
C2 BSP
E mm
F mm
Thision EVO WH
250 - 70
W
500 - 70 250 - 120 500- 120
630 750 630 750
140 140 140 140
H
2015 1879 2015 1879 B2
460 460 460 460
D
1506133614331258
C1
C2
C3 BSP
C3
G mm
E
F
G
1578
1061
323
1483
1082
352
1578
1061
323
1483
1082
352
1 1/4 “ 1 1/4 “
1 1/4 “ 1 1/4 “
3/4 “ 3/4 “3/4 “ 3/4 “
1 1/2 “
1 1/2 “ 1 1/2 “
1 1/2 “
W
100 B1
D
H1
H1 mm 1952 1821 1952 1821
11
J
K
L
M
N
mm
mm
mm
mm
mm
J
K
L
M
N
1100
1000
800
700
600
1100
1000
800
700
600
DHW Flow
DHW
Secondary
Return
CW
Inlet
1000
900
450
350
250
1000
900
450
350
250
Cable Gland
Cable Gland
Condense Waste
Gas
PRV Drain
O
P
Q
O mm 1578 1578
1483 1483
Pmm 1215 1215
1122 1122
Qmm 323 323
352 352
C4
C4 BSP 3/4 “ 3/4 “
3/4 “ 3/4 “
C5 BSP 1 “ 1 “
1 “ 1 “
C4
C4
C5
Thision EVO WH Thision EVO WH Thision EVO WH

Installation
Water heater installation
Connecting the water heater
Water heater installation
The boiler should be positioned in a
frost-proof boiler room. If the boiler
room is on the roof, the boiler itself may
never be the highest point of the instal-
lation.
When positioning the boiler, please
note the recommended minimum clea-
rance in the picture. When the boiler is
positioned with less free space, mainte-
nance activities will be more difficult.
Connecting the water heater
This chapter will explain how to make
all connections to the boiler with regard
to:
Hydraulic connections
Condensate drain connection
Gas connection
Flue gas connection
Air intake connection
Electrical connection
The boiler should always be connected
in such a way, that the system applies
to all relevant standards and regulati-
ons (European, national and local). It’s
the responsibility of the installer to en-
sure that all standards and regulations
are respected.
Hydraulic connections (1,2,3,4)
Condensate connection (5)
After filling with water, the syphon
(included in delivery) should be
installed to the connection (5) at
the bottom of the water heater.
Connect the hose to the draining
system in the boiler room. The
connection to the draining system
should always be done with an open
connection, in order to avoid flooding
the boiler in case of a blocked drain.
Gas connection (6)
The gas connection must be made by
an authorized installer in accordance
with the applicable national and local
standards and regulations.
Connect the gas line from the system
tension free to the gas connection (6) of
the boiler. A gas cock should be moun-
ted directly behind the boiler.
5 6
3 4
The Thision WH should be connected to
the mains water supply, The concentration
of chloride in the water supply should be
less than 200mg/l. Should the hardness be
measured at more than 14°dH then a
softener should be installed to bring the
hardness down to between 6°dH and 8°dH.
Caution!
When installing the Thision WH a mains water kit must be used.
The DHWS flow connection should be protected against
a vacuum by use of an anti-vacuum valve.
1000mm
300mm
500mm
200mm
12

Installation
Connecting the water heater
Flue gas connection (7)
Regulations for the construction of flue
gas systems are very different for each
country. It should be ensured that all
national regulations with regard to flue
gas systems are respected.
Connect the flue gas system to the flue
gas connection (7) of the water heater,
use flue gas systems with seamless
connections only. It’s not necessary to
make a separate condensate drain for
the flue gas system, as the condensate
will be drained via the syphon of the
boiler.
Please note the following issues:
It’s recommended to use stainless
steel or PPS fluegas systems
The diameter of the flue gas system
must be chosen by calculation ac-
cording to the national regulations
Construct the flue gas system as
short as possible (for maximum
length see planner documentation)
Construct horizonal ways with a mini-
mum angle of 3º
Air intake connection (8)
The air intake can be connected in ca-
se of room sealed installation. The dia-
meter should be calculated according
to the national regulations, together
with the flue gas system. The total re
-
sistance of both systems should never
overcome the maximum permissible
resistance of the fan inside the boiler
(see also chapter: Technical data).
Electrical connection
The electrical connection must be
made by an authorized installer in
accordance with the applicable
national and local standards and re-
gulations.
For the power supply it’s necessary
to use a mains isolator switch with a
contact opening of at least 3 mm
within the boiler room. This switch
can be used to switch off the power
supply for maintenance purposes.
8 7
13

The Thision WH can be fed directly from the mains supply to the property without
the need for seperate feed cisterns or vent pipes. It is supplied complete with all its
necessary inlet and safety controls, and thermal cut out.
Schematic installation details for unvented applications
PRESSURE REGULATING VALVE
c/w NON RETURN VALVE
T&P RELIEF
VALVE
PRIMARY
FLOW &
RETURN
DRAIN COCK
(NOT SUPPLIED)
DISCHARGE
PIPE
TUNDISH
SECONDARY RETURN
TAPPING
TO HOT
OUTLETS
MAINS
WATER
SUPPLY
EXPANSION VALVE
EXPANSION VESSEL
Thermal
cut out
Examples of acceptable discharge arrangements are;
i. Ideally below a fixed grating and above the water seal in a trapped gully.
ii. Downward discharges at low level; i.e. up to 100mm above external surfaces such
as car parks, hard standings, grassed areas etc. are acceptable providing that where
children may play or otherwise come into contact with discharges a wire cage or
similar guard is positioned to prevent contact, whilst maintaining visibility.
iii. Discharges at high level; e.g. into a metal hopper and metal downpipe with the end of the
discharge pipe is clearly visible (tundish visible or not) or onto a roof capable of withstanding high
temperature discharges of water and 3m from any plastic guttering systems that would collect such
discharges (tundish visible).
iv. Where a single pipe serves a number of discharges, such as in blocks of flats, the number served
should be limited to not more than 6 systems so that any installation discharging can be traced
reasonably easily. The single common discharge pipe should be at least one pipe size larger than the
largest individual discharge pipe (D2) to be connected. If unvented hot water storage systems are
installed where discharges from safety devices may not be apparent i.e. indwellings occupied by blind,
infirm or disabled people, consideration should be given to the installation of an electronically operated
device to warn when discharge takes place.
Note: The discharge will consist of scalding water and steam. Asphalt, roofing felt and non metallic
rainwater goods may be damaged by such discharges.
Unvented Applications
14

Valve outlet size Minimumsizeof
discharge pipe D2 Minimumsizeof
fromtundish
Maximum
resistance
allowed,
expressed as a
length of straight
pipe (i.e. no.
elbowsorbends)
createdbyeach
elboworbend
G1/2 15mm 22mm 28mm
35mm
up to9m
upto18m
upto27m
0.8m
1.0m
1.4m
G3/4 22mm 28mm 35mm
42mm
up to9m
upto18m
upto27m
1.0m
1.4m
1.7m
G1 28mm 35mm 42mm
54mm
up to9m
upto18m
upto27m
1.4m
1.7m
2.3m
Fixed grating
Discharge below
fixed grating
(Building Regulation
G3 section 3.9d gives
alternative points
of discharge)
Trapped
gully
Discharge pipe (D2) from tundish,
with continuous fall. See Building
Regulation G3 section 3.9d i-iv,
Table4and worked example
300mm
minimum
500mm maximum
Metal discharge pipe (D1) from
Temperature relief valve to tundish
Tundish
Safety device
(e.g. Temperature
relief valve)
Sizing of copper discharge pipe (D2) for common T&P relief valve sizes
Schematic discharge pipe arrangement
Unvented Applications
Worked example of discharge pipe sizing.
The example below is for a G1/2 temperature relief valve with a discharge pipe (D2) having 4 No. elbows and length of
7m from the tundish to the point of discharge.
From Table 1:
Maximum resistance allowed for a straight lenght of 22mm copper discharge pipe (D2) from a G1/2 temperature relief
valve is 9.0m.
Subtract resistance of 4 No. 22mm elbows at 0.8m each = 3.2m
Therefore permitted length equates to 5.8m.
5.8m is less than the actual length of 7m therefore calculate the next largest size.
Maximum resistance allowed for straight lenght of 28mm copper discharge pipe (D2) from a G1/2 temperature relief
valve equates to 18m.
Subtract resistance of 4 No. 28mm elbows at 1.0m each = 4.0m
Therefore the maximum permitted length equates to 14m.
As the actually length is 7m, a 28mm (D2) copper pipe will be satisfactory.
15
Resistance
discharge pipe D2

16
Cylinder Controls
Electrical Connections

Commissioning
Water and hydraulic system
17
Commissioning of the water heater should
be carried out by authorised personnel only.
Failure to respect this condition makes the
guarantee void. A protocol of the commiss-
ioning should be filled out (see end of this
manual for example of commissioning prot-
ocol).
This chapter explains the commissioning
of the water heater with the standard
water heater controller. When an additio-
nal controller is installed, please refer to
its manual for commissioning the controller.
Filling and venting the domestic hot water system
Step 1:Open the furthest outlet from unit
Step 2:Open the mains cold water supply
until all the air has been eliminated
from the outlet
Step 3:Open the valve on the reciculation circuit,
when all of the air has been eliminated
close the outlet
Step 4:Check pipework for leaks
Further Commissioning
Once the system has been completely filled and vented
the unit can be connected to the electrical supply.
All DHWS settings are pre-set.
Ensure the following are operating correctly.
The recirculation pump should operate continuously,
ensure the pump is running
The load pump will operate intermittently, ensure
the pump turns freely
The boiler should operate when the loading pocess
has started
The loading process will stop when the sytem has
reached the required temperature
During the loading process the pumps speed will be
altering this can lead to a pulsing sound from the pumps
but is not damaging to their operation
Display codes during use:
The display will show various codes during operation
including the unit flow temperature.
Temperature Setting
The Thision WH is factory set at 65 C DHW flow and 60
DHW return, the temperature can only be adjsuted using
specialist equipment.

1
1
1
2
Commissioning
18 GB
Gas supply
Check the gas supply connecon to
the boiler for soundness before start-
ing the boiler!
Purge any air between the gas valve
and the gas line. This can be done at
the test point (1) at the gas pressure
switch.
Don’t forget to close the test point
aerwards!
Condensate connecon
Remove the syphon (2) from the con-
densate connecon. Fill it with water
and place it back in the original posi-
on.
Make sure the syphon is filled before
starng the boiler, in order to pre-
vent flue gases discharging through
the condensate connecon!
Flue and air intake connecons
Check whether the flue and air intake
systems are made according to the
naonal and local regulaons.
Installaons which don’t comply
with the regulaons, are not allowed
to be commissioned.
Make sure that all connecons are
free.
The size of flue gas and air intake
connecons may not be reduced.
Gas supply
Condensate connecon
Flue and air intake connecons
Air Intake connecon
Flue gas connecon
1
1
THISION L Evo 70 THISION L Evo 120

Commissioning
Prepare water heater for first startup
19
M
H
B C D E F
I
L
G
A
Legend:
A On/off switch
B Return (ESC)
C Room temperature control
D Confirmation (OK)
E Manual mode
F Chimney sweeper mode
G Info mode
H Reset button
I Operation mode heating zone(s)
L Display
M Operation mode DHW
Preparation for first startup
Open the gas supply;
Enable the power supply to the boiler;
Switch on the boiler with the on/off
switch (1);
Make sure the boiler is in standby
mode (K);
Check the pump operation: make
sure the pump runs in the right
direction;
Release all air from the pump motor.
It‘s recommended to put the boiler on
50% load after the first startup, as this
is the best starting point to do a proper
combustion analysis. This can be done
with the following procedure:
Push button I >3 Sek, the boiler goes
into controller Stopp mode.
Push the Info button (G), the actual
boiler load (%) appears in the display;
Choose „set up“ (confirm with OK
button), now the boiler load can be
changed by rotating the wheel (C)
and confirming the 50% setting with
the OK button.
After checking the combustion values
(see next page), the controller Stopp
mode can be stopped by pushing the
control mode button (I) >3 Sek.
1
Cylinder Diagnosis
It is possible to view the operational data of each of
the Thision WH i.e. temperatures, this is achieved by
holding the button on the cylinder controller for
approximately 5 seconds. The diagnosis number is
shown for 1 second then the value for 3 seconds.
The diagnosis setting can be exited by holding the button for
5 seconds or if the button is not depressed for 10 minutes.
So software version
D0 Operating Status
D1 Current T1 temperature
D2 Current T2 temperature
D3 Current T3 temperature
D4 Current T4 temperature
D5 N/A
D6 Load pump P1 speed (rpm)
D7 Required temperature
Temperature Setting
The Thision WH is factory set for 60 C DHW flow and can
be adjusted by 5 C by switching the unit off and back on
whilst holding the control button on the PCB.
ºº

++
+-
-
+
-
+
Commissioning
20 GB
Combuson analysis
Combuson sengs
Combuson check at full load
Start the boiler in controller stop
mode and go to 50% load. Now the
boiler operates at 50% load. Allow
the boiler to stabilise the combuson
for 3 minutes. Then increase the
boiler load step by step up to 100%.
Check the gas pressure on the inlet
of the gas valve while increasing the
boiler load:
the gas pressure should never go
below the minimum required value
-- see technical data.
When an (oponal) minimum gas
pressure switch is connected, this
must be set to 75% of the required
gas pressure.
Check the combuson sengs
via the test point in the chimney
connecon (1).
If necessary, correct the sengs with
the small adjustment screw at the
top of the mixer (3).
Combuson check at minimum load
Switch the boiler to minimum load
(0%).
Check the combuson sengs the
same way as described for full load.
If necessary, correct the sengs with
the large adjustment screw at the
top of the gas valve (2).
Combuson check at 50% load
An addional reference check of
combuson values at 50% load is
recommended in order to check if
the gas valve is set in such way, that
the modulang behaviour is normal.
The CO2value should be in between
the sengs of full load and minumum
load.
CO value should be equal to full load
and minimum load values.
Make sure that the boiler is set to
automac operaon and controller
stop mode is disabled aer the
combuson test is finished.
Combuson sengs
Adjustments must be made by
qualified persons only.
If the appliance manufacturer
supplies checkout and/or service and
maintenance instrucons carefully
follow them.
If such instrucons are not provided
then use the procedure outlined
below.
Adjustment can only be made with a
special tool.
•Remove cap screw with a screw
driver to expose offset adjustment
screw.
•Check gas supply pressure to the
appliance using a pressure gauge
connected to the inlet pressure
tap.
•Start fan and check air flow.
•Energize both electric operators in
order to have gas input to burner
and ignite boiler.
•Operate boiler on high output.
•Adjust CO2% with throle
adjustment screw (3) to the
desired value. Turn screw driver
clockwise way to increase CO2%.
•Operate boiler on low output
•Adjust the CO2% at the desired
value at low output with offset
adjustment screw (2). Turn offset
adjustment screw clockwise to
increase CO2%.
•Replace cap screw and ghten
pressure tap.
Combuson sengs max. load
for natural gas G20
THISION L EVO 120
CO2, max % 8.4 -0.2
CO2, min % 8.5 -0.2
+0
+0
Combuson sengs max. load
for natural gas G20
THISION L EVO 70
CO2, max % 8.4
-0.2
CO2, min % 9.0 -0.2
+0
+0
TH-L Evo70
TH-L Evo 120
TH-L Evo70 TH-L Evo 120
Combuson sengs max. load
for LPG G31
THISION L EVO
70-120
CO2, max % 9.6
+0.2
CO2, min % 9.6
+0.2
+0
+0
3
2
2
1