Atmos D15P User manual

Instruction manual - GB II.
www.atmos.cz
Instruction
manual

Instruction manual - GB II.
www.atmos.cz GB-3
GB II.
Contents
1. Intended use 5
2. Technical description 5
Control panel appearance 6
3. Technical data 7
Boiler drawings key 8
Technical data 8
Drawings of boilers 9
Cut away views - type D15P 9
Cut away vies – types D20P, D30P, D45P 9
Cut away view - type D15P Cut away view – type D45P 10
Extraction ventilator schematics – boiler types D20P, D30P, D45P 10
4. Supplied boiler accessories 11
Automatic ash removal from the boiler drum 11
5. Fuel 12
6. Boiler bases 12
7. Environment type and boiler placement in a boiler room 12
8. Chimney 13
9. Flue-gas duct 13
10. Fire prevention during installation and use of heating appliances 14
11. Connecting boilers to the electric network 15
12. Wiring diagram of electromechanical regulation with an extraction ventilator, type UCJ 4C52 (D15P, D20P) 15
13. New wiring diagram of electromech. regul. with an extraction ventilator, type UCJ 4C52 (D15P, D20P),
valid from 12/2007 16
14. Wiring diagram of electromechanical regulation with an extraction ventilator, type UCJ 4C52 (D30P, D45P) 16
15. Wiring diagram of electromech. regul. with an extraction ventilator, type UCJ 4C52 (D30P, D45P),
valid from 12/2007 17
16. Obligatory ČSN EN standards related to boiler designing and installation 17
17. Choice and connection method of control and heating elements 18
18. Boiler corrosion protection 19
19. Specified boiler connection with Laddomat 21 19
20. Specified boiler connection with an equalizing tank 20
21. Recommended wiring diagram with Laddomat 21 and accumulators 20
22. Laddomat 21 21
23. Thermoregulatory valve ESBE 21
24. Connection of overheat protecting cooling loop with a safety valve Honeywell TS 130 - 3/4 A or WATTS STS20 22
25. Operating instructions 22
Preparing boilers for operation 22
Boiler adjustments before burning pellets: 23
26. Placing the shaped pieces into the combustion area (for D15P and D20P types) 24
Connecting the burner (for D15P and D 20P types) 24
Connecting the burner (for D30P and D 45P types) 25
Boiler system with an external storage container and conveyor 25
Boiler room with a built-in pellet storage 26
Setting the output and basic parameters when putting the boiler and IWABO VILLAS S1 burner into operation 26
Draught regulator - HONEYWELL Braukmann FR124 – Assembly instructions 29
27. Boiler cleaning and ash removal 30
28. Heating system maintenance - including boilers 30
29. Use and inspections 30
30. Possible failures and troubleshooting 31
31. Spares 32
Door sealing cord replacement 32
Adjusting the door hinges and locks 33
32. Environmental protection 33
Disposal of the boiler after expiration of its service life 33
GUARANTEE CONDITIONS 34
BOILER INSTALLATION REPORT 35
ANNUAL INSPECTIONS RECORDS 36
RECORDS OF GUARANTEE PERIOD AND POST-GUARANTEE PERIOD REPAIRS 37

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4-GB
Instruction manual - GB II.
GB II.
WE HOPE THAT YOU ARE SATISFIED WITH OUR
PRODUCT AND WE KINDLY RECOMMEND YOU TO
FOLLOW THESE MAIN RULES IMPORTANT FOR A
LONG SERVICE LIFE AND THE CORRECT FUNCTION-
ALITY OF THE BOILER
1. Installation, ignition test and operator‘s training shall be carried out by an installation company
trained by the manufacturer. This company also completes a boiler installation report (p.37).
2. When burning pellets use only good quality fuel of 6 – 8 cm diameter made from soft barkless
wood (white pellets).
3. Therefore, there must be a Laddomat 21 or a thermoregulatory valve installed behind the boiler in
order to keep the minimum temperature of water returning to the boiler at 65°C. Operating
temperature of water in the boiler must be in the 80-90°C range.
4. Every circulating pump in the system must be regulated by an individual thermostat in order to
keep the specified minimum temperature of water returning to the boiler.
5. We recommend installing the boiler with at least one equalising tank; the volume of which
should be 500 – 1000 litres. Thus a longer service life of the pellet burner and lower fuel con-
sumption are achieved.
CAUTION – if the boiler is installed with a Laddomat 21 or with a TV 60°C ther-
moregulatory valve and with the accumulation tanks (see attached schematics), the
guarantee period for the boiler drum is extended from 24 to 36 months. The guarantee
period for other parts remains unaffected. In non-compliance with these principles,
the drum’s and the heatproof shaped pieces’ service life may dramatically decrease
due to low-temperature corrosion.
The boiler drum may corrode in as little time as 2 years.

Instruction manual - GB II.
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GB II.
1. Intended use
The hot water boilers ATMOS D15P, D20P, D30P and D45P are designed for convenient heating in
residential houses, weekend house and other similar buildings by wood pellets 6 – 8 mm diameter.
The boiler is not intended for burning sawdust or small-particle wood waste.
2. Technical description
A pellet burner with a conveyor is fitted to the left or right side of the boiler. It is attached to a frame
with sealing cord (18 x 32) by a screw. The boiler drum is manufactured as a welded structure of 3-6
mm thick steel sheets. The boiler consists of a fuel-feeding hopper (combustion chamber) which is in
the lower and rear section fitted with a heatproof shaped piece and in the upper part with a ceramic
spherical chamber (shaped piece). The boiler types D15P and D20P have a heatproof shaped piece
fitted opposite the pellet burner. The shaped piece protects the boiler drum against damage and also
serves as a place on which the flame burns out completely. In the lower part of the boiler, there is a
movable grill (for facilitating the ash removal) under which an ash-pan is located. A loading (clean-
ing) door is located in the front wall of the boiler. The boilers drum is externally heat insulated by
mineral wool placed beneath the sheet metal covers of the boilers’ external housing. A panel with a
switch, operating (control) thermostat, pump thermostat, safety thermostat, thermometer and fuse is
located in the upper area of the boiler. The air inlet is equipped with a control flap-valve operated by
the Honeywell FR124 draught regulator. The boiler standard model is fitted with a cooling loop pro-
tecting it against overheating. The models D20P, D30P and D45P have also an extraction ventilator
fitted to the rear side. The ventilator facilitates reaching the maximum output. It is switched on and off
by an independent switch located in the boiler control panel and it is controlled by the same operating
thermostat as the pellet burner.
With the D20P boiler type, use the extraction ventilator with the burner preset to an
output ranging from 16 – 22 kW only. With types D30P and D45P, the extraction ven-
tilator must be always operating when burning pellets.

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6-GB
Instruction manual - GB II.
GB II.
Control panel appearance
Description:
1. Thermometer – monitors the temperature of water exiting the boiler
2. Main switch – allows for completely shutting down boiler if necessary (restart the pellet burner)
3. Control thermostat – regulates the operation of the pellet burner and also (with the D20P or
D30P models) regulates the extraction ventilator. The regulation is based on the temperature of
water exiting the boiler.
4. Pump thermostat – serves for switching the pump placed in the boiler circuit (set it to tempera-
ture between 70 – 80°C).
5. Safety irreversible thermostat – serves as boiler protection against overheating in case of control
thermostat failure or as an indication of exceeding the emergency temperature. If such exceeding
occurs, it is then necessary to depress the thermostat.
6. Extraction ventilator switch – serves for switching the extraction ventilator of D20P, D30P and
D45P boiler types in pellet-burning operation mode.
7. Fuse (6.3 A) – pellet burner electronics protection.
8. Area for electronic regulation of the heating system can be used to house any type of regulation
that fits into an aperture of 92x138 mm. The electric harness is prefabricated and ready to be used
for the regulation’s power supply.
ČERPADLO / PUMP
KOTLOVÝ / OPERATING
1
0
1
0
384
576
1. Thermometer
2. Main switch
3. Control thermostat (for boiler)
4. Pump thermostat
5. Safety thermostat
6. Extraction ventilator switch (except for the
D15P type)
7. Fuse
8. Area for electronic regulation of the heating
system (92x138 mm)

Instruction manual - GB II.
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GB II.
3. Technical data
ATMOS boiler type D15P D20P D30P D45P
Boiler output kW 4,5-15 6,5-22 8,9-29,8 13,5-45
Heating surface m21,9 2 2,7 3,6
Fuel shaft volume dm370 70 105 140
Feeding hole dimensions mm 270x450 270x450 270x450 270x450
Specified chimney draught Pa 18 15 21 23
Max.operating water-pressure kPa 289 250 250 250
Boiler weight kg 259 305 370 430
Gas-outlet pipe diameter mm 152 152 152 152
Boiler height mm 1405 1405 1405 1405
Boiler width mm 606 606 606 606
Boiler depth mm 470 470 670 870
Electric parts ingress protection IP 20
Electric input - at start-up
- in operation W1120 120
1170
170
510
110
510
110
Boiler efficiency % 90,4 91,1 >90 >90
Boiler class 3
Waste gas temperature at nominal output °C 141 128 170 170
Waste gas combustion products flow weight at
nominal output kg/s 0,012 0,016 0,025 0,035
Specified fuel Good quality pellets with 6 – 8 mm diameter and 15-18 MJ.kg-1 caloric
power.
Average fuel (pellets) consumption at nominal
output kg.h-1 3,7 5 8,6 11,8
Boiler water volume l 65 82 91 117
Hydraulic pressure drop mbar 0,22 0,22 0,23 0,24
Equalising tank minimum volume l 500 500 750 1000
Connecting voltage V/Hz 230/50
Specified min. temperature of water returning to boiler is 65°C when in operation.
Specified boiler operating temperature is 80-90°C.

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8-GB
Instruction manual - GB II.
GB II.
Boiler drawings key
Technical data
1. Boiler drum
2. Loading (cleaning) door
3. Ash-pan
4. Control panel
5. Control valve
6. Heatproof shaped piece – combustion area
bottom
7. Heatproof shaped piece – upper spherical
chamber
8. Frame screen
9. Extraction ventilator
10. Output regulator - Honeywell FR 124
11. Door filling - Sibral
12. Door sealing 18 x 18 mm
13. Lock
14. Heatproof shaped piece – rear face of the
spherical chamber
15. Ash-pan lock
16. Cooling loop
17. Burner aperture lid
18. Tube heat exchanger cleaning lid
19. Air-break valve (also serves as a brush with
D20P, D30P and D45P models)
20. Rear-duct cleaning lid
21. Thermometer
22. Main switch
23. Control (boiler) thermostat
24. Pump thermostat
25. Safety thermostat
26. Fuse
27. Extraction ventilator switch (except for the
D15P type)
28. Grill
K – the flue-gas duct neck
L – the boiler water outlet
M – the boiler water inlet
N – filling valve pipe sleeve
P – sleeve for a sensor of the valve which reg
lates the cooling loop (TS 130, STS 20)
Dimen-
sions
D15P D20P D30P D45P
A1405 1405 1405 1405
B 470 470 670 870
C606 606 606 606
D 1040 848 848 848
E152 152 152 152
G211 211 211 211
H1163 1163 1163 1163
CH 202 202 202 202
J6/4” 6/4” 6/4” 2”

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GB II.
Drawings of boilers
Cut away views - type D15P
Cut away vies – types D20P, D30P, D45P

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10-GB
Instruction manual - GB II.
GB II.
Cut away view - type D15P Cut away view – type D45P
Boiler without an extraction ventilator Boiler with an extraction ventilator
Extraction ventilator schematics – boiler types D20P, D30P, D45P
CAUTION – The extraction ventilator is supplied disassembled. Place it over the rear flue-
gas duct, tighten everything well, connect into a socket and test for its smooth operation.
1 - Motor
2 - Plate
3 - Rotating wheel (stainless steel)
4 - Nut with left-handed thread and washer
5 - Wing nut
6 - Bolt
7 - Large gasket (2pcs)
8 - Small gasket

Instruction manual - GB II.
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GB II.
4. Supplied boiler accessories
Steel brush with accessories 1pc
Poker 1pc
Filling-in valve 1pc
Operating and maintenance instructions manual 1pc
Draught regulator - Honeywell FR 124 1pc
Automatic ash removal from the boiler drum
Each pellet type boiler produced after 1.3. 2007 can be fitted
with automatic ash removal from the boiler body into the ad-
ditional ash-pan, which will require emptying once in 14 to 45
days, depending on the quality of the pellets. For one minute,
this automatic device removes the ash from the chamber un-
der the burner by means of screw conveyor in regular interval
of one hour or according another setting in the ash removal
module. We can repeat this cycle in the boiler several times
by switching the main switch on and off. When the additional
ash-pan is completely full, the ash removal device will stand
off (a screw) and a sound signal will start. New start up should
be performed after cleaning the external ash-pan by means of
switching the main boiler switch on and off.
The automatic ash-removal system does not need any specific operating procedures.
Just make sure that the additional ash container /30/ is emptied regularly. The con-
tainer is attached to the boiler by means of two clips with safety catches /32/. These
clips must be fastened well during the boiler operation so that no inadvertent release of
the ash-removal device and consequent transfer of ash into the boiler room may occur.
This device must be installed in compliance with the supplied installation instructions.
When installing the device, we follow the
installation manual delivered with the device.

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12-GB
Instruction manual - GB II.
GB II.
5. Fuel
The specified fuel are good quality pellets of 6-8 mm diameter, 10-25 mm length and 16-19 MJ.kg-1
caloric power. Good quality pellets are such that do not disintegrate into sawdust and are made from
soft barkless wood (so called white pellets).
6. Boiler bases
Boiler type (mm) A B
D15P, D20P 600 600
D30P 600 800
D45P 600 1000
We recommend providing a concrete
(metal) base under the boiler.
7. Environment type and boiler placement in a boiler room
Boilers may be used in a “basic environment” - AA5/AB5 as specified in Czech standard ČSN3320001/
1995. Boilers must be placed in a boiler room with sufficient air access necessary for combustion.
Placing boilers in living areas (including halls/corridors) is not permitted. The combustion air inlet
aperture in the boiler room must be of minimum 300 cm2 for boilers of 4.5 - 48 kW outputs.
1 - Chimney
2 - Flue duct
3 - Boiler

Instruction manual - GB II.
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GB II.
8. Chimney
Connecting the appliance to the chimney vent stack must always be carried out with the per-
mission of the appropriate chimney authority. The vent stack must always be capable of providing
sufficient draught and it must discharge the waste gas into the open atmosphere in a reliable manner
for all possible operating conditions. The dimensions of the individual vent stack must be correct to
ensure good functionality of the boiler; because the draught influences combustion, performance
and the service life of the boiler. The chimney draught is directly dependent on its cross section,
height and the inner wall ruggedness. It is not permitted to connect another appliance into a chimney
into which a boiler is connected. The chimney diameter must not be smaller than the boiler outlet
(min. 150 mm). The chimney draught must comply with the specified values (see technical data, page
7). The chimney must not be excessively high, otherwise the boiler effectiveness is decreased and the
combustion is affected (the flame “breaks”). In case of excessive draught, install a throttle valve in the
flue gas duct between the boiler and the chimney.
Indicative values of the chimney cross-section dimensions:
20 x 20 cm height 7 m
20-cm diameter height 8 m
15 x 15 cm height 11 m
16-cm diameter height 12m
Exact chimney dimensions are stipulated in Czech standard ČSN 73 4201:2002.
Specified chimney draught is stated in section 3 „Technical Data“.
9. Flue-gas duct
The flue-gas duct must be connected into the chimney vent stack. If the boiler cannot be connected to
the chimney directly, the appropriate flue-gas duct extension must be as short as possible in the given
circumstances, but not longer than 1m, it must be without additional heating surface and must incline
upwards in the direction towards the chimney. Flue-gas ducts must be mechanically durable and
sealed against combustion products and gas penetration, and it must be possible to clean them inside.
The flue-gas ducts must not be lead through another person‘s apartment or property. The internal diam-
eter of the flue-gas duct must not be larger than the internal di-
ameter of the chimney intake and it must not decrease in width
in the direction towards the chimney. Use of elbow-pipes is not
suitable. Methods for providing flue-gas duct entries through
flammable material structures are stipulated in appendices 2
and 3 of the Czech standard ČSN 061008/97. These are appro-
priate for mobile installations, wooden cottages etc.
1 Waste gas thermometer
2 Cleaning aperture
3 Throttle valve (draught limiter)
In case of excessive chimney draught, install a throt-
tle valve (3) or draught limiter.

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14-GB
Instruction manual - GB II.
GB II.
10. Fire prevention during installation and use of heating appliances
Selected from ČSN 061008/97 – Fire safety of local appliances and heat sources.
Safe distances
When installing the appliance, keep a minimum safe distance of 200 mm from building materials.
This distance is valid for boilers and flue-gas ducts positioned near flammable materials of the B, C1
and C2 flammability class (the flammability classes are listed in chart 1). It is necessary to double the
200 mm safe distance if the boilers and flue-gas ducts are placed near flammable materials of C3 class
(see chart 1). It is also necessary to double the safe distance if the flammability class of the material
in question cannot be determined. The safe distance can be decreased to one half (to 100 mm) if a
heat insulating, non-combustible screen (asbestos board) of a 5 mm minimum thickness, is placed 25
mm from the protected combustible material (so called flammable insulation). The screening board
or protection screen (on the protected object) must exceed the boiler outline including its flue-gas duct
on each side by at least 150 mm and by at least 300 mm above its upper surface. The screening board
or protection screen must be also used for all fixtures and fittings from combustible materials in cases
where the safe distance cannot be maintained (such as in mobile structures or wooden cottages etc. -
for more details see ČSN 061008 standard). The safe distance must be maintained even when placing
fixtures and fittings near the boilers.
If boilers are placed on floors from combustible materials, the floor must be fitted with a non-com-
bustible, heat insulating pad exceeding the boiler’s ground-outline on the side where the stoking and
ash-pan apertures are, by at least 300 mm (in front of the aperture) and on all the other sides by at
least 100 mm. The non-combustible, heat-insulating pad can be made from any material of A flam-
mability class.
Chart 1
Flammability classes of
building materials and prod-
ucts
Building materials and products categorised by their flammabil-
ity class (selected from Czech standard ČSN 730823)
A – non-combustible granite, sandstone, concrete, bricks, ceramic tiles, mortars, fireproof-
ing plasters etc.)
B – non-easily flammable Akumin, Izomin, Heraklit, Lignos, basalt felt boards, fibreglass
boards, Novodur
C1 – low degree of flammabil-
ity
deciduous tree wood (oak, beech), Hobrex boards, plywood, Sirkolit,
Werzalit, hardened paper (Formica, Ecrona)
C2 – medium degree of flam-
mability
coniferous tree wood (pine tree, larch, spruce), chipboards and cork
boards, rubber flooring (Industrial, Super)
C3 – high degree of flamma-
bility
fibreboards (Hobra, Sololak, Sololit), cellulose materials, poly-
urethane, polystyrene, polyethylene, foamed PVC
CAUTION - In circumstances when there is a risk of temporary access of flammable gases
or fumes, or during works when a temporary fire or explosion risk may possibly occur (such
as gluing linoleum, PVC etc.) the boilers must be put out of operation long enough before
the risk occurrence. No items from flammable materials may be placed on the boilers or
near them into a distance lower than the specified safe distance.

Instruction manual - GB II.
www.atmos.cz GB-15
GB II.
11. Connecting boilers to the electric network
Boilers are to be connected to a 230 V, 50 Hz electric network with electric cord without plug. The
network connection is of the M type and when replacement is needed the service company must use
the same type connection to replace it. Connection may only be carried out by a person qualified in
compliance with all valid regulations of the particular country.
CAUTION – the electric cord must not be fitted with a termination (male plug for a socket).
It must be connected into a distribution box in a permanent manner so that no mistake in
cable identification is possible.
12. Wiring diagram of electromechanical regulation with an
extraction ventilator, type UCJ 4C52 (D15P, D20P)
The A and B connectors are used for the power supply of the heating-system electronic reg-
ulation. The electronic regulation may be fitted in the control panel of certain boiler types.
velikost: 200x160 mm
Schéma zapojení elektromechanické regulace
D15P / D20P
1 4 5 2
PE PE PE
REG-L
REG-N
REG-L
REG-N
BL -black
-schwarz -černá
BU-blue
-blau -modrá
BR-brown
-braune -hnědá
GY -green/yellow
-grün/gelb -zeleno/žlutá
R-red
-rot -červená
LNPE LN PE
LN L
L2
L1
N
1µF
(D20P)
230V/50Hz
ODPOPELNĚNÍ
GY
BU
BL
GY
BU
BL
BL
GY
BU
R
GY
BL
BR
BU
BL
BU
BU
BL
BL
BL
BL
BL
BL
BL
BL
BL
BL
BU
BU
BU
BL
BU
1 4 5 2
t
tt
RELE - L
RELE - N

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16-GB
Instruction manual - GB II.
GB II.
13. New wiring diagram of electromech. regul. with an extraction
ventilator, type UCJ 4C52 (D15P, D20P), valid from 12/2007
14. Wiring diagram of electromechanical regulation with an
extraction ventilator, type UCJ 4C52 (D30P, D45P)
Schéma zapojení elektromechanické regulace
DxxP A50
1 4 5 2
PE PE
t
PE
REG-L REG-N
REG-L REG-N
BL -black
-schwarz -černá
BU-blue
-blau -modrá
BR-brown
-braune -hnědá
GY -green/yellow
-grün/gelb -zeleno/žlutá
R-red
-rot -červená
LNPE L N PE
LNL
L2
L1
N
1µF
230V/50Hz
ODPOPELNĚNÍ
GY
BU BL
GY
BU
BL
BL
GY
BU
R
GY
BL
BR
BU
BL
BU
BU
BL
BL
BL
BL
BL
BL
BL
BL
BL
BL
BU
BU
BU BL BU
1 4 5 2
tt
OVLÁDÁNÍ NÍZKONAPĚŤOVÉHO
OKRUHU HOŘÁKU A50
RELE - L
RELE - N
velikost: 200x160 mm
1 2 3 4 5 6 7 8 9 10 11 12
LN PE L
MM
LN
D15/20P
HLvyp2
SNvyp2
HNvyp2
SLvyp2
1 24 5




PE LN
( D20P )
R
BU
BL
GY
1
µ
F
poj-Cpoj-1
FUSE 6,3 A
SICHERUNG 6.3 A
POJISTKA 6.3 A
L1
N1
L2




  



L
N
HLvyp
SNvyp
HNvyp
SLvyp
1 24 5









 
 
t
PE
T-C
T-2
T-1



t
PE
PT-1
PT-C



L
N
230V/50Hz
   




A
C
D






























a+
b-




B
















E
F
G

A
  
B
C
D
E
F
 

           
G
  
  
L
N
t
PE
BT100-L2
BT100-L1



BT100-N1
BT100-N2

Instruction manual - GB II.
www.atmos.cz GB-17
GB II.
15. Wiring diagram of electromech. regul. with an extraction
ventilator, type UCJ 4C52 (D30P, D45P), valid from 12/2007
16. Obligatory ČSN EN standards related to boiler designing
and installation
ČSN EN 303-5 - Solid fuel boilers for central heating
ČSN 06 0310/98 - Central heating, designing and assembly
ČSN 06 0830/96 - Safety devices for central heating and hot potable water heating
ČSN EN 73 4201/02 - Designing chimneys and flue-gas ducting
ČSN EN 1443/03 - Chimney structures – general requirements
ČSN 06 1008/97 - Fire safety of local appliances and heat sources
ČSN 73 0823/84 - Construction materials flammability class
ČSN EN 1264-1 - Floor heating – Systems and components – Definitions and symbols
ČSN EN 1264-2 - Floor heating – Systems and components – Heat output calculation
ČSN EN 1264-3 - Floor heating – Systems and components – Designing
ČSN EN 442-2 - Heaters – Testing and test analysis
CAUTION – the boiler must be installed in compliance with a design prepared in advance.
Installation may only be carried out by persons trained by the manufacturer.
1 2 3 4 5 6 7 8 9 10 11 12
LN PE L
MM
LN
D30/45P
HLvyp2
SNvyp2
HNvyp2
SLvyp2
1 24 5



PE LN
R
BU
BL
GY
1
µ
F
poj-Cpoj-1
FUSE 12,5 A
SICHERUNG 12,5 A
POJISTKA 12,5 A
L1
N
L2






  
AC05-L
AC05-N AC 05
L
N
HLvyp
SNvyp
HNvyp
SLvyp
1 24 5









 
 
t
PE
T-C
T-2
T-1



t
PE
PT-1
PT-C



L
N
230V/50Hz
   






A


































a+
b-




B










C
D



F
E
H
H
  
G






A
  
B
C
D
E
F
 

           
G
  
  
L
N
t
PE
BT100-L2
BT100-L1



BT100-N1
BT100-N2

www.atmos.cz
18-GB
Instruction manual - GB II.
GB II.
17. Choice and connection method of control and heating elements
Boilers are provided to the user with the basic boiler performance control elements compliant with re-
quirements for convenient heating and its safety. The regulation ensures that the required temperature
of the water exiting the boiler (80 - 90°C) is adhered to. Boilers are fitted with an integral thermostat
for switching the pump in the boiler circuit on and off. Connection of these elements is illustrated in
the wiring diagram. Every pump in the system must always be controlled by an individual thermostat
to avoid a temperature drop of water returning to the boiler 65°C. When connecting the boiler with-
out an accumulation tank or equalizing tank, the pump placed in the heated building circuit must be
switched by an individual thermostat or electronic regulation so that it only operates when the pump
in boiler circuit operates. If two thermostats are used – each for switching one pump – set the thermo-
stat that switches the heated building circuit pump to 80°C, and the thermostat that switches the boiler
circuit pump, to 75°C. Both pumps may also be switched by just one thermostat at the same time. If
there is an adequately functioning gravity water circulation between the boiler and the system, which
prolongs the required temperature build-up, the value of the thermostat designated for switching the
boiler circuit pump can be reduced. Setting the required water temperature for the building is always
achieved by means of a three-way mixing valve. The mixing valve can be regulated manually or by
electronic regulation, which contributes to a more convenient and economical operation of the heating
system. The connection of all the elements is designed by a specialist designer to suit specific condi-
tions of the heating system. Electric installations related to the additional equipping the boilers with
the above mentioned elements must be carried out by an expert in compliance with valid ČSN EN
standards.
When installing the boiler, we recommend using a closed expansion tank. However, an
open tank may also be used if permitted in the standards of the specific country. The
boiler must always be installed in a way which prevents overheating (and subsequent
damage) even during a power cut. It is because the boiler has certain momentum.
There are several ways of protecting the boiler against overheating. Connecting an
overheat prevention cooling loop with a TS 130 3/4 A (95/110°C) or WATTS STS 20
(97°C) valve to the public water system. In cases of personal wells, the boiler can be
additionally protected by using a back-up power supply (battery with an exchanger)
for operation back up of at least one pump. Another option is connecting the boiler to
an after-cooling tank and reversal zone valve.
When installing the boiler, position the rear section 10 mm higher (prop it up) in order
to facilitate circulating and air-bleeding.
For the heating system regulation we recommend regulation elements provided by the following
companies:
a) ATMOS ACD 01 tel.: [phone]
b) KOMEXTHERM, Praha tel.: [phone]
c) KTR, Uherský Brod tel.: [phone]
d) Landis & Staefa tel.: [phone]

Instruction manual - GB II.
www.atmos.cz GB-19
GB II.
18. Boiler corrosion protection
The specified solution is connecting the boiler with Laddomat 21 or with a thermoregulatory valve,
which can separate the boiler circuit from the heating circuit (primary and secondary circuits), and
provide minimum of 65°C for water returning to boiler. The higher the temperature of water re-
turning to the boiler, the fewer tars and acids condensing; which damage the boiler. Temperature of
the outgoing water must permanently range between 80 - 90°C. The combustion products (waste gas)
temperature must not drop below 110°C during normal operation. Low waste gas temperature causes
condensation of tars and acids even when the specified outgoing water temperature of 80 - 90°C and
returning water temperature of 65°C are adhered to. For outputs of 15 - 100 kW it is also possible
to keep the minimum temperature of the returning water (65-75°C) by utilising a three-way mixing
valve with an electric actuator and electronic regulation.
19. Specified boiler connection with Laddomat 21









 













 









www.atmos.cz
20-GB
Instruction manual - GB II.
GB II.
20. Specified boiler connection with an equalizing tank
21. Recommended wiring diagram with Laddomat 21 and accumulators







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
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
Pipeline diameters if connected with accumulation tanks
Boiler type and output section A section B
in copper in steel in copper in steel
D15P, D20P 28x1 25 (1”) 28x1 25 (1”)
D30P 35x1,5 32 (5/4”) 28x1 25 (1”)
D45P 54x2 50 (2”) 35x1,5 32 (5/4”)

Instruction manual - GB II.
www.atmos.cz GB-21
GB II.
22. Laddomat 21
With its construction, Laddomat 21 replaces the tra-
ditional connection composed of individual parts.
It consists of a cast-iron body, thermoregulatory
valve, pump, non-return flap valve, ball valves and
thermometers. When the water temperature reaches
78 °C, the thermoregulatory valve opens the water
supply from the storage tank. The connection with
Laddomat 21 is considerably easier and therefore, we
recommend it. A spare thermo-cartridge of 72°C is
supplied with the Laddomat 21 device. It is used for
boilers over 32 kW.
OPERATION DATA
Max. operating pressure 0,25 MPa
Design pressure 0,25 MPa
Withstand test pressure 0,33 MPa
Max. operating temperature 100°C
WARNING - Laddomat 21 is designed only for boilers with output up to 75 kW. However,
we recommend using it only with boilers with output up to 50 kW (inclusive).
23. Thermoregulatory valve ESBE
Thermoregulatory valve type ESBE, TV 60 °C is used
with solid fuel boilers. When the boiler water tempera-
ture reaches + 60 °C, the thermoregulatory valve opens
and fluid from the building heating circuit (2) enters
the boiler circuit ( 3 →1). Inlets 1 and 3 always remain
open. This ensures that the minimum temperature of
the water returning to the boiler is maintained. If need
be, a thermoregulatory valve set to a higher temperature
(E.g. 72°C) may be used.
Recommended size of the thermoregulatory valve TV 60°C.
For boilers: D15P, D20P ................................................................................... DN 25
D30P .............................................................................................. DN32
D45P .............................................................................................. DN40
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