Atag XL-W Series User manual

Planner Manual
XL-W
XL-W
Gas Condensing Wall Hung Boiler
Single Installations (75 to 210 kW)
Cascade Installations up to 1600 kW
1V0 08-2020

2

3
Contents
Gas condensing boiler Models and output....................................................................................5
Application possibilities ............................................................................5
Value propositions....................................................................................5
Technical description
Sales text………………………………………………………………………..6
Technical data........................................................................................14
Dimensions single engine……………………………………………………16
Dimensions double engine ....................................................................17
Boiler transport and unpacking...............................................................18
Boiler standard delivery..........................................................................19
Cascade installation ...............................................................................20
Dimensions cascade - Wall mounted .....................................................21
Dimensions cascade - Freestanding in line ............................................23
Dimensions cascade - Freestanding Back to Back.................................25
Clearances single boiler .........................................................................27
Declaration of conformity .......................................................................28
Norms and regulations General regulations................................................................................29
Water quality...........................................................................................31
System water additives...........................................................................32
Flue gas system Requirements and regulations................................................................34
Certified flue gas systems ...................................................................... 35
Materials.................................................................................................36
Flue gas data..........................................................................................36
Dimensioning single ...............................................................................36
Collective flue gas systems ....................................................................37
Boiler installation Electrical connections............................................................................. 43

4
Contents
Standard schemes Standard schemes .................................................................................56
Accessories Controls .....................................................................................................
Single boiler Gas........................................................................................
Single boiler Hydraulics ..............................................................................
Single boiler Others ....................................................................................
Cascade Frame ..........................................................................................
Cascade Gas..............................................................................................
Cascade Hydraulics....................................................................................
Cascade Specifically for Italy......................................................................
Cascade Flue .............................................................................................

5
Gas condensing boiler XL-W
Models and output
Application possibilities
Value propositions
Models and output
The XL-W is a condensing and
modulating gas boiler with one or
two pre-mix burners and
avaliable in 7 types within an
output range from 60 to 200 kW.
Application possibilities
The XL-W is applicable for all
central heating sytems built
according to EN12828 with a
maximum target temperature of
90*C.
In cascade applications (max. 8
boilers with boiler/cascade con-
troller) the XL-W can cover in-
stallations up to 1600 kW.
Preferred applications are
central heating and sanitary hot
water production in multi-family
buildings, municipal and
industrial buildings.
Value propositions
A large modulation range that
guarantees along
Description
The XL-W is a fully modulating
condensing boiler with one or two
pre-mix burners. The control unit of
the boiler adapts the modulation
ratio automatically to the heat de-
mand requested by the system.
This is done by controlling the
speed of the fan. As a result, the
mixing system will adapt the gas
ratio to the chosen fan speed, in
order to maintain the best possible
combustion figures and therewith
the best efficiency. The flue gases
created by the combustion are
transported downwards through
the heat exchanger and leave at
the boiler at the top into the chim-
ney connection.
The return water from the system
enters the boiler in the lower sec-
tion, where is the lowest flue gas
temperature in the boiler. In this
section condensation takes place.
The water is being transported
upwards through the heat ex-
changer, in order to leave the boil-
er at the flow connection. The
cross flow working principle (water
up, flue gas down) ensures the
most efficient combustion results.

6
Gas condensing boiler XL-W
Models and output
Application possibilities
Value propositions
Legend
1. Heat Exhanger 1 (see
table 1)
2. Heat Exchanger 2 (see
table 1)
3. Ignition electrode
4. Detection electrode
5. Fan unit
6. Venturi
7. Gas valve
8. Automatic air vent
9. Manual air vent
10. Main switch 230V
11. Boiler control unit
12. Control unit MMI
Legend
13. Connection terminal
14. Connection terminal
cascade bus communica-
tion
15. Connection terminal pc
16. Dirt collector
17. Circulation pump
18. Water no return valve
19. Flue connection
20. Air supply
21. Collective flue pipe
22. Information plate
23. Drainage cap
24. Clip 3 zone (optional)
Legend
25. Air / flue connection con-
centric (optional for XL-W
60-70-100-120-140)
26. Water pipe conection
reduction 1 1/2“(optional)
27. Gas pipe conection re-
duction 1“(optional)
T1 Flow sensor
T1a Secondary flow sensor
T2 Return sensor
P1 Water pressure sensor
APS Air pressure switch
Legend
G Gas Pipe
A Flow pipe CH
R Return pipe CH
C Condansate drain pipe
Boiler Type Exchanger 1 Exchanger 2
75 iCon XL 1 -
105 iCon XL 2 -
125 iCon XL 1 iCon XL 1
150 iCon XL 1 iCon XL 1
180 iCon XL 2 iCon XL 1
210 iCon XL 2 iCon XL 2
Table 1
Legend
1. Heat Exhanger 1 =Burner A
2. Heat Exhanger 1 =Burner B
3. Ignition
4. Ceramic burner
5. Gas valve
6. Fan
7. Flue non-return valve
8. Venturi
9. Automatic air vent
10. Circulation pump
11. Control unit MMI
12. Burner control unit
13. Flue gas out
14. Air inlet
15. Water non-return valve
T1 Flow Sensor
T1a Secondary flow sensor
T2 Return sensor
P1 Water pressure sennsor
G Gas pipe
A Flow pipe
R Return pipe
C Condensate dain pipe

7
Technical description
Sales text ATAG XL-W 75
ATAG XL-W 75
Wall-hung condensing gas boiler
Overview of features:
• compact, pre-assembled construction and ready for connection
• stainless steel heat exchanger
• Insulation in expanded polypropylene
• premixed burner in material ceramic for continuous adjustment of power
• Control unit ACP for combustion management, modulation and safety pump modulation management and
flow measurement via the ACP unit
• combustion control with the ionization principle
• automatic temperature control
• 0-10 V DC input for connection to an external regulation system
• alarm output or operating status
• connections for the flow probe of the heating circuit, DHW and external probe
• ACP control unit with LCD display capacitive touch with led indication status: active / standby / lock, oper-
ating mode selection DHW or central heating, cascade manager integrated, chimney sweep mode with
power selection minimum / maximum regardless of outside temperature, regulation of the heating flow tem-
perature, DHW temperature regulation, e-bus2 connections for connection with accessories from the ATAG
offer
• Ready for connection to BMS systems supported protocols Modbus, bacnet, lonworks, KNX with dedicated
accessory
• Ready for systems management, solar thermal through dedicated accessory
• Possibility of pump management DHW circuit via diverter valve or storage heating pump, single heating
zone management via power supply pump and modulation
• Operating hours counter, alarm and fault history
• support for wall mounting included
• automatic air vent valve
• flue non return valve
• modulating pump pre-mounted in the boiler modulating with flow measurement and diagnostics
Nominal thermal power at full load
with 80/60°C: 65.3 kW
with 50/30°C: 72.0 kW
Nominal heat input full load Net: 66.7 kW
Gross seasonal efficiency: 95,8%
Type of gas: natural gas
Gas inlet pressure max/min: 25-17mbar
NOx: < 24 mg/kWh
BREEAM credits: 2
Electrical connection: 230 V (50 Hz)
Dimensions (HxWxD): 1100x530x595 mm
Weight: 73 kg
Fittings
- air / flue gas: 100/100 mm
- water: R 2 ''
- gas: R 1/2 ''
Efficiency class: A / A
For water quality information refer to the instruction booklet

8
Technical description
Sales text ATAG XL-W 105
ATAG XL-W 105
Wall-hung condensing gas boiler
Overview of features:
• compact, pre-assembled construction and ready for connection
• stainless steel heat exchanger
• Insulation in expanded polypropylene
• premixed burner in material ceramic for continuous adjustment of power
• Control unit ACP for combustion management, modulation and safety pump modulation management and
flow measurement via the ACP unit
• combustion control with the ionization principle
• automatic temperature control
• 0-10 V DC input for connection to an external regulation system
• alarm output or operating status
• connections for the flow probe of the heating circuit, DHW and external probe
• ACP control unit with LCD display capacitive touch with led indication status: active / standby / lock, oper-
ating mode selection DHW or central heating, cascade manager integrated, chimney sweep mode with
power selection minimum / maximum regardless of outside temperature, regulation of the heating flow tem-
perature, DHW temperature regulation, e-bus2 connections for connection with accessories from the ATAG
offer
• Ready for connection to BMS systems supported protocols Modbus, bacnet, lonworks, KNX with dedicated
accessory
• Ready for systems management, solar thermal through dedicated accessory
• Possibility of pump management DHW circuit via diverter valve or storage heating pump, single heating
zone management via power supply pump and modulation
• Operating hours counter, alarm and fault history
• support for wall mounting included
• automatic air vent valve
• flue non return valve
• modulating pump pre-mounted in the boiler modulating with flow measurement and diagnostics
Nominal thermal power at full load
with 80/60°C: 89.4 kW
with 50/30°C: 99.0 kW
Nominal heat input full load Net: 92.3 kW
Gross seasonal efficiency: 95,.2%
Type of gas: natural gas
Gas inlet pressure max/min: 25-17mbar
NOx: < 24 mg/kWh
BREEAM credits: 2
Electrical connection: 230 V (50 Hz)
Dimensions (HxWxD): 1050x530x675 mm
Weight: 80 kg
Fittings
- air / flue gas: 100/100 mm
- water: R 2 ''
- gas: R 1/2 ''
Efficiency class: A / A
SSIGA approval:
For water quality information refer to the instruction booklet

9
Technical description
Sales text ATAG XL-W 125
ATAG XL-W 125
Wall-hung condensing gas boiler
Overview of features:
• compact, pre-assembled construction and ready for connection
• stainless steel heat exchanger
• Insulation in expanded polypropylene
• premixed burner in material ceramic for continuous adjustment of power
• Control unit ACP for combustion management, modulation and safety pump modulation management and
flow measurement via the ACP unit
• combustion control with the ionization principle
• automatic temperature control
• 0-10 V DC input for connection to an external regulation system
• alarm output or operating status
• connections for the flow probe of the heating circuit, DHW and external probe
• ACP control unit with LCD display capacitive touch with led indication status: active / standby / lock, oper-
ating mode selection DHW or central heating, cascade manager integrated, chimney sweep mode with
power selection minimum / maximum regardless of outside temperature, regulation of the heating flow tem-
perature, DHW temperature regulation, e-bus2 connections for connection with accessories from the ATAG
offer
• Ready for connection to BMS systems supported protocols Modbus, bacnet, lonworks, KNX with dedicated
accessory
• Ready for systems management, solar thermal through dedicated accessory
• Possibility of pump management DHW circuit via diverter valve or storage heating pump, single heating
zone management via power supply pump and modulation
• Operating hours counter, alarm and fault history
• support for wall mounting included
• automatic air vent valve
• flue non return valve
• modulating pump pre-mounted in the boiler modulating with flow measurement and diagnostics
Nominal thermal power at full load
with 80/60°C: 110.3 kW
with 50/30°C: 122.2 kW
Nominal heat input full load Net: 112.8 kW
Gross seasonal efficiency: 96.1%
Type of gas: natural gas
Gas inlet pressure max/min: 25-17mbar
NOx: < 24 mg/kWh
BREEAM credits: 2
Electrical connection: 230 V (50 Hz)
Dimensions (HxWxD): 1050x690x595 mm
Weight: 127 kg
Fittings
- air / flue gas: 100/100 mm
- water: R 2 ''
- gas: R 1/2 ''
For water quality information refer to the instruction booklet

10
Technical description
Sales text ATAG XL-W 150
ATAG XL-W 150
Wall-hung condensing gas boiler
Overview of features:
• compact, pre-assembled construction and ready for connection
• stainless steel heat exchanger
• Insulation in expanded polypropylene
• premixed burner in material ceramic for continuous adjustment of power
• Control unit ACP for combustion management, modulation and safety pump modulation management and
flow measurement via the ACP unit
• combustion control with the ionization principle
• automatic temperature control
• 0-10 V DC input for connection to an external regulation system
• alarm output or operating status
• connections for the flow probe of the heating circuit, DHW and external probe
• ACP control unit with LCD display capacitive touch with led indication status: active / standby / lock, oper-
ating mode selection DHW or central heating, cascade manager integrated, chimney sweep mode with
power selection minimum / maximum regardless of outside temperature, regulation of the heating flow tem-
perature, DHW temperature regulation, e-bus2 connections for connection with accessories from the ATAG
offer
• Ready for connection to BMS systems supported protocols Modbus, bacnet, lonworks, KNX with dedicated
accessory
• Ready for systems management, solar thermal through dedicated accessory
• Possibility of pump management DHW circuit via diverter valve or storage heating pump, single heating
zone management via power supply pump and modulation
• Operating hours counter, alarm and fault history
• support for wall mounting included
• automatic air vent valve
• flue non return valve
• modulating pump pre-mounted in the boiler modulating with flow measurement and diagnostics
Nominal thermal power at full load
with 80/60°C: 129.9 kW
with 50/30°C: 142.4 kW
Nominal heat input full load Net: 133.2 kW
Gross seasonal efficiency: 95.1%
Type of gas: natural gas
Gas inlet pressure max/min: 25-17mbar
NOx: < 24 mg/kWh
BREEAM credits: 2
Electrical connection: 230 V (50 Hz)
Dimensions (HxWxD): 1050x690x595 mm
Weight: 127 kg
Fittings
- air / flue gas: 100/100 mm
- water: R 2 ''
- gas: R 1/2 ''
For water quality information refer to the instruction booklet

11
Technical description
Sales text ATAG XL-W 180
ATAG XL-W 180
Wall-hung condensing gas boiler
Overview of features:
• compact, pre-assembled construction and ready for connection
• stainless steel heat exchanger
• Insulation in expanded polypropylene
• premixed burner in material ceramic for continuous adjustment of power
• Control unit ACP for combustion management, modulation and safety pump modulation management and
flow measurement via the ACP unit
• combustion control with the ionization principle
• automatic temperature control
• 0-10 V DC input for connection to an external regulation system
• alarm output or operating status
• connections for the flow probe of the heating circuit, DHW and external probe
• ACP control unit with LCD display capacitive touch with led indication status: active / standby / lock, oper-
ating mode selection DHW or central heating, cascade manager integrated, chimney sweep mode with
power selection minimum / maximum regardless of outside temperature, regulation of the heating flow tem-
perature, DHW temperature regulation, e-bus2 connections for connection with accessories from the ATAG
offer
• Ready for connection to BMS systems supported protocols Modbus, bacnet, lonworks, KNX with dedicated
accessory
• Ready for systems management, solar thermal through dedicated accessory
• Possibility of pump management DHW circuit via diverter valve or storage heating pump, single heating
zone management via power supply pump and modulation
• Operating hours counter, alarm and fault history
• support for wall mounting included
• automatic air vent valve
• flue non return valve
• modulating pump pre-mounted in the boiler modulating with flow measurement and diagnostics
Nominal thermal power at full load
with 80/60°C: 154.4 kW
with 50/30°C: 170.9 kW
Nominal heat input full load Net: 158.8 kW
Gross seasonal efficiency:95.5%
Type of gas: natural gas
Gas inlet pressure max/min: 25-17mbar
NOx: < 24 mg/kWh
BREEAM credits: 2
Electrical connection: 230 V (50 Hz)
Dimensions (HxWxD): 1050x690x595 mm
Weight: 132 kg
Fittings
- air / flue gas: 130/130 mm
- water: R 2 ''
- gas: R 1/2 ''
For water quality information refer to the instruction booklet

12
Technical description
Sales text ATAG XL-W 210
ATAG XL-W 210
Wall-hung condensing gas boiler
Overview of features:
• compact, pre-assembled construction and ready for connection
• stainless steel heat exchanger
• Insulation in expanded polypropylene
• premixed burner in material ceramic for continuous adjustment of power
• Control unit ACP for combustion management, modulation and safety pump modulation management and
flow measurement via the ACP unit
• combustion control with the ionization principle
• automatic temperature control
• 0-10 V DC input for connection to an external regulation system
• alarm output or operating status
• connections for the flow probe of the heating circuit, DHW and external probe
• ACP control unit with LCD display capacitive touch with led indication status: active / standby / lock, oper-
ating mode selection DHW or central heating, cascade manager integrated, chimney sweep mode with
power selection minimum / maximum regardless of outside temperature, regulation of the heating flow tem-
perature, DHW temperature regulation, e-bus2 connections for connection with accessories from the ATAG
offer
• Ready for connection to BMS systems supported protocols Modbus, bacnet, lonworks, KNX with dedicated
accessory
• Ready for systems management, solar thermal through dedicated accessory
• Possibility of pump management DHW circuit via diverter valve or storage heating pump, single heating
zone management via power supply pump and modulation
• Operating hours counter, alarm and fault history
• support for wall mounting included
• automatic air vent valve
• flue non return valve
• modulating pump pre-mounted in the boiler modulating with flow measurement and diagnostics
Nominal thermal power at full load
with 80/60°C: 179.1 kW
with 50/30°C: 197.4 kW
Nominal heat input full load Net: 184.5 kW
Gross seasonal efficiency: 95%
Type of gas: natural gas
Gas inlet pressure max/min: 25-17mbar
NOx: < 24 mg/kWh
BREEAM credits: 2
Electrical connection: 230 V (50 Hz)
Dimensions (HxWxD): 1050x690x595 mm
Weight: 140 kg
Fittings
- air / flue gas: 130/130 mm
- water: R 2 ''
- gas: R 1/2 ''
For water quality information refer to the instruction booklet

13
Technical description
Technical data
ErP data
TRIGON L PLUS 75 105
Permit CE0063CT3449
Category GB: II2H3P
Heat exchanger type iConXL1 iConXL2
Output G20 Full load 80/60°C kW 65,4 90,2
40/30°C kW 72,0 99,0
Low load 80/60°C kW 14,6 18,1
40/30°C kW 16,1 19,9
G31 Full load 80/60°C kW 65,4 90,2
40/30°C kW 72,0 99,0
Low load 80/60°C kW 23,2 34,3
40/30°C kW 25,6 37,7
Input G20 Full load kW 66,7 92,3
Low load kW 14,9 18,5
G31 Full load kW 66,7 92,3
Low load kW 23,6 35,0
Gas consumption G20 Full load m3/h 7,1 9,8
Low load m3/h 1,6 2,0
G31 Full load kg/h 5,5 7,6
Low load kg/h 1,92 2,84
Boiler efficiency Full load 80/60°C %98,0 97,7
Full load 40/30°C %108,0 107,3
Low load 80/60°C %98,3 97,9
Low load 40/30°C %108,4 107,6
Gas type Natural gas or Gas propane
CO2 natural gas min./max Vol. % 8,7 / 9,3
CO2 propane gas min./max Vol. % 10,2 / 10,8
O2 natural gas min./max Vol. % 5,3 / 4,3
NOx class 66
Max. flue gas temperature 80/60°C 61 71
Mass flow of flue gas kg/h 120 166
Overpressure at boiler output max Pa 156 243
Water content max l9,3 13,9
Weight kg 73 80
Gas flow pressure - standard mbar 20
Gas flow-pressure min./max. mbar 17 / 25
Water pressure min./max bar 0,7 / 6
Voltage/frequency min./max Volt/Hz 230 / 50
Max. power consumption W137 120
Power consumption part load W45 95
Power consumption stand by W55
Width / depth / height mm 530/595/1050 530/675/1050
Gas external thread RRp 1.1/4" Rp 1.1/4"
Flow/return external thread RRp 2" Rp 2"
Flue gas connection PPS Diameter DN 100 100
Outdoor air connection Internal in mm 100 100
Condensate connection PVC External in mm 35,5 35,5
ErP data according to 813/2013/EU 75 105
Seasonal room-heating energy efficiency class A
Nominal heat output Pn (kW) 64 88
Seasonal room-heating energy efficiency class ηs (%) 93 93
Annual energy consumption QHE (GJ) 199 272
Noise output level, inside LWA (dB) 65 60
At rated heat output and high-temp regime 80/60°C P4 (kW) 65,3 90,2
At 30 % of rated heat output and low-temp regime 36/30°C P1 (kW) 21,8 30,2
At rated heat output and high-temp regime (GCV) η4 (%) 88,2 88,0
At 30 % of rated heat output and low-temp regime (GCV) η1 (%) 98,3 98,2
At full load elmax (kW) 0,137 0,120
At part load elmin (kW) 0,045 0,095
In standby mode Psb (kW) 0,005 0,005
Standby heat loss Pstby (kw) 0,086 0,075

14
Technical description
Technical data
ErP data
TRIGON L PLUS 125 150 180 210
Permit CE0063CT3449
Category GB: II2H3P
Heat exchanger type iConXL1
iConXL1
iConXL1
iConXL1
iConXL1
iConXL2
iConXL2
iConXL2
Output G20 Full load 80/60°C kW 110,8 130,5 155,5 180,3
40/30°C kW 122,2 142,4 170,9 197,4
Low load 80/60°C kW 14,7 14,6 14,6 18,1
40/30°C kW 16,2 16,0 16,1 19,8
G31 Full load 80/60°C kW 110,8 130,5 155,5 180,3
40/30°C kW 122,2 142,4 170,9 197,4
Low load 80/60°C kW 23,3 23,2 23,2 34,3
40/30°C kW 25,7 25,3 25,5 37,6
Input G20 Full load kW 112,8 133,2 158,8 184,5
Low load kW 14,9 14,9 14,9 18,5
G31 Full load kW 112,8 133,2 158,8 184,5
Low load kW 23,6 23,6 23,6 35,0
Gas consumption G20 Full load m3/h 11,9 14,1 16,8 19,5
Low load m3/h 1,6 1,6 1,6 2,0
G31 Full load kg/h 9,2 10,9 13,0 15,1
Low load kg/h 1,92 1,92 1,92 2,84
Boiler efficiency Full load 80/60°C %98,2 98,0 97,9 97,7
Full load 40/30°C %108,3 106,9 107,6 107,0
Low load 80/60°C %98,5 98,3 98,2 97,9
Low load 40/30°C %108,7 107,3 107,9 107,3
Gas type Natural gas or Gas propane
CO2 natural gas min./max Vol. % 8,7 / 9,3
CO2 propane gas min./max Vol. % 10,2 / 10,8
O2 natural gas min./max Vol. % 5,3 / 4,3
NOx class 6666
Max. flue gas temperature 80/60°C 62 61 72 71
Mass flow of flue gas kg/h 203 239 285 331
Overpressure at boiler output max Pa 143 200 215 265
Water content max l16,8 16,8 21,3 25,8
Weight kg 127 127 132 140
Gas flow pressure - standard mbar 20
Gas flow-pressure min./max. mbar 17 / 25
Water pressure min./max bar 0,7 / 6
Voltage/frequency min./max Volt/Hz 230 / 50
Max. power consumption W314 418 464 450
Power consumption part load W66 71 109 99
Power consumption stand by W6,8 6,8 6,8 6,8
Width / depth / height mm 690/595/1050 690/595/1050 690/675/1050 690/675/1050
Gas external thread RRp 1.1/4" Rp 1.1/4" Rp 1.1/4" Rp 1.1./4"
Flow/return external thread RRp 2" Rp 2" Rp 2" Rp 2"
Flue gas connection PPS Diameter DN 100 100 130 130
Outdoor air connection Internal in mm 100 100 130 130
Condensate connection PVC External in mm 35,5 35,5 35,5 35,5
ErP data according to 813/2013/EU 125 150 180 210
Seasonal room-heating energy efficiency class
Nominal heat output Pn (kW) 108 128 152 176
Seasonal room-heating energy efficiency class ηs (%) 93 93 93 93
Annual energy consumption QHE (GJ) 335 394 471 543
Noise output level, inside LWA (dB) 67 70 67 63
At rated heat output and high-temp regime 80/60°C P4 (kW) 110,8 130,6 155,6 180,3
At 30 % of rated heat output and low-temp regime 36/30°C P1 (kW) 37,0 43,7 52,0 60,4
At rated heat output and high-temp regime (GCV) η4 (%) 88,4 88,2 88,2 88,0
At 30 % of rated heat output and low-temp regime (GCV) η1 (%) 98,4 98,3 98,2 98,2
At full load elmax (kW) 0,314 0,418 0,464 0,450
At part load elmin (kW) 0,066 0,071 0,109 0,099
In standby mode Psb (kW) 0,007 0,007 0,007 0,007
Standby heat loss Pstby (kw) 0,079 0,079 0,100 0,141

15
Technical description
Dimensions
XL-W75 105
XL-W75 105
AHeight mm 1050 1050 Concentric connection mm 100/150* 100/150*
A1 Height + flue conn. mm 1135 1135 Parallel connection mm 2x100 2x100
BWidth mm 530 530 gGas connection 1 1/4" 1 1/4"
C1 / C2 Depth mm 595 675 Gas connection** 1" ** 1" **
DFlue gas conn. mm 345 345 cCondensate connection mm 35 35
EAir intake conn. mm 185 185 aBoiler flow connection 2" 2"
FFlue / air intake mm 150 150 Boiler flow connection** 1 1/2" ** 1 1/2" **
GReturn connection mm 103 103 rBoiler return connection 2" 2"
H Flow connection mm 243 243 Boiler return conn.** 1 1/2" ** 1 1/2" **
ICondensate connection mm 345 345
JGas connection mm 430 430 * with concentric adapter (accessory)
KCondensate connection mm 60 60 ** with water/gas connection reduction kit (accessory)
LBoiler return-flow-gas mm 75 75
MBoiler return-flow-gas mm 25 25
Single Engine

16
Technical description
Dimensions
XL-W125-150 180-210
XL-W125-150 180-210
AHeight mm 1050 1050 Concentric connection mm 100/150* -
A1 Height + flue conn. mm 1135 1135 Parallel connection mm 2x100 2x130
BWidth mm 690 690 gGas connection 1 1/4" 1 1/4"
C1 / C2 Depth mm 595 675 Gas connection** 1" ** 1" **
DFlue gas conn. mm 345 345 cCondensate connection mm 35 35
EAir intake conn. mm 185 185 aBoiler flow connection 2" 2"
FFlue / air intake mm 150 150 Boiler flow connection** 1 1/2" ** 1 1/2" **
GReturn connection mm 103 103 rBoiler return connection 2" 2"
H Flow connection mm 243 243 Boiler return conn.** 1 1/2" ** 1 1/2" **
ICondensate connection mm 345 345
JGas connection mm 430 430
* with concentric adapter (accessory)
KCondensate connection mm 60 60 ** with water/gas connection reduction kit (accessory)
LBoiler return-flow-gas mm 75 75
MBoiler return-flow-gas mm 25 25
Double Engine

17
Technical description
Boiler transport
The XL-W is a fully equipped compact
heating system, which has been pre-set
and tested at the factory.
The package dimensions for allappli-
ances are:
Width 750mm
Height 1200mm
Depth 800mm
This makes it possible to transport all
models in one piece through a normal
door.
The boiler can be moved using a fork-lift
or pallet truck.Unpacking instructions are
printed on the cardboard box. Please
follow the proposed steps.
Disassembly of panelling
The appliance casing panels can be
easily removed and this is recom-
mended while the appliance is being
installed. This limits the potential for da-
mage to occur.
Lifting and carrying precautions:
- Wear protective clothing and gloves
to protect from any sharp edges.
- The boiler has to be lifted from the
front with a forklift truck for transport.
Panelling should be attached and
secured with the supplied screw,
after assembly of the boiler, or after
maintenance works.
1. Remove the plastic strip.
2. Open the 4 upper folders, and remove the documentation and the condense
pipe.
3. Remove the carton inserts, remove the carton box.
4. Remove the wall plate from the back of the boiler (removing one screw),and re-
move the 4 screws on bottom part of the boiler.
5. Install the boiler on the cascade (with a fork lifter).
6. Install the boiler on the new wall plate (with a fork lifter).
7. Remove the water and gas plastic cap, connect the condense pipe,and follow the
installation manual.

18
Technical description
Standard boiler
Boiler transport
Boiler installation
Clearance
Standard boiler
A boiler delivery package contains the
following components:
Component Pcs. Package
Completely assembled and tested boiler 1In cardboard box
Mounting rail 1In boiler packaging
Installation manual XL-W1
In document bag in boiler packagingERP label (only XL-W 60-70) 1
Condense pipe 1
Boiler transport
The XL-W boiler will be suplied as a fully equipped compact appliance, which has been pre-set and tested. The dimensions
of the packaging are : 60,70,100,120,140,170,200:800 x 1200 x 750 mm (W x H x D).
This makes it possible to transport all models in one piece through a normal door.The boiler can be picked up or from the
front with a forklift truck for transport.Unpacking instructions are printed on the carboard box. Please follow the proposed
steps.
Boiler Installation
The installation location of the CH-boiler(s) has to be, and remain, frost-free. It is NOT necessary to have a purpose
provided air vent providing a twin pipe or concentric room sealed flue system is used in the room or internal
space in which the boiler is installed. Neither is it necessary to ventilate the compartment in which the boiler is installed, due
to the extremely low surface temperature of the boiler casing during operation. The floor has to be flat and level and have
sufficient deadweight capacity for the complete(filled)installation.
When positioning the boiler, please
note the recommended minimum
clearance in the picture. When the
boiler is positioned with less free
space, maintenance activities will be
more difficult.
If you have opted to build the
hydraulic part yourself, then ATAG
recommends using “Connection set
XL-W as single boiler” for each
boiler.

19
Dimensions Cascade
XL-W / cascade installaon
Cascade
In principle, any combination is possible depending on the installation requirements. The selection of the models can
be different outputs. Including boilers with common outputs assists with sharing the load and run times of individual ap-
pliance.
The capacity of the hydraulic pipes, gas line, and low loss header are adjusted to the selected overall demand.
When installing the a single XL-W boiler or cascade XL-W boilers, the use of a low loss header adjusted to the set de-
mand is strongly suggested. ATAG Heating Solutions offer optional matched low-velocity mixing headers suitable for
heat outputs up-to 1600kW.

20
Cascade possibilities
The ATAG XL-W cascade can be mounted in 3 ways:
- Wall-mounted in line
All boilers alongside one another on the wall
- Free-standing in line
All boilers hanging alongside one another on a free-standing frame
- Free-standing back-to-back
All boilers hanging back-to-back on a free-standing frame
Dimensions Cascade
XL-W / cascade installaon
Legend:
1. Air supply
2. Flue gas discharge/Air supply
3. Cascade manager
Accessories:
4. Gas isolation valve
5. Service valves flow and return
6. Non-return valve
Legend:
Accessories:
7. Flow / return header
8. Gas line
9. Low loss header
10. Safety valve 3 or 6 bar
11. Fill and drain valve
Legend:
Accessories:
12. Automatic air vent low loss
header
13. Pocket for temperature sensor
T10
14. Frame
XL-W Cascade examples wall-mounted
XL-W 2 boilers wall mounted in line XL-W 3 boilers wall mounted in line