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LAARS® NEOTHERM®
LAARS® NEOTHERM®
High EfficiencyCommercial Modulating,
Condensing Boilers
PACKED WITH FEATURES• Large Color Touch Screen
• Less Than10ppm NOx
• Up to 96.6% Thermal Efficiency
• 6 Models 285 to 850 MBH
• Vent up to 100 feet, horizontal or vertical
• Zero clearance to combustibles for tight installations
Efficiency Data
AFUE %
95.0
N/A
N/A
N/A
N/A
N/A
285
399
500
600
750
850
N/A
96.5
95.0
95.3
96.6
95.7
ThermalEfficiency %
N/A
96.5
95.0
96.0
96.6
95.7
CombustionEfficiency %
285,000
399,900
500,000
600,000
750,000
850,000
83.5
117.2
146.4
175.7
219.8
248.9
264,000
386,000
475,000
572,000
724,000
813,000
77.4
113.1
139.2
167.6
212.1
238.2
11/2"11/2"11/2"11/2"2"2"
3/4"3/4"1"1"
11/2"11/2"
136
165
190
193
218
228
299
364
419
426
481
503
InputBTU/h kW
OutputBTU/h kW
Connection Size (NPT)ShippingWeight
Water Gas lbs. kgSize
LAARS® NEOTHERM
®
HYDRONIC BOILER
Standard Equipment:• High condensing efficiency• Modulation down to 20% of full fire
(5:1 turndown)• Sealed combustion chamber• Stainless Steel Heat Exchanger• Pre-mix stainless steel burner• Low NOx system (10ppm) exceeds
the most stringent regulations for air quality
• Horizontal or vertical direct vent• Horizontal vent and air terminals• Vent and air pipe lengths of up to
100 equivalent feet (each)• Built-in condensate trap• Vent temperature cutoff feature
• Integrates with Building Automation Systems
• Spark ignition system• 160 psi maximum working pressure• Stainless steel heat exchanger with
welded construction (no gaskets)• ASME “H” stamp• 75 psi (517 kPa) ASME rated
pressure relief valve• Temperature & pressure gauge• Drain valve• Multiple pump control for boiler
pump, system pump and indirect domestic water pump, each with delay
• Connections from top of unit• ENERGY STAR® for 285 size only
• Electronic PID modulating control• Large color touch screen• Alarm output• Accepts external 4-20mA
modulation control (0-10V optional)• Indirect water heater priority
with sensor• Outdoor reset with sensor• On/off toggle switch• Manual reset high limit• Burner sight glass• Zero clearance to combustible
surfaces for alcove and closet installations
• 10 year limited warranty
LAARS® NEOTHERM®
Hydronic BoilerNeoTherm is a direct vent, sealed combustion, condensing boiler with thermal efficiency as high as 96.6% that modulates with a 5 to 1 turndown. The boiler features an ASME stainless steel heat exchanger, boiler pump (size 285 only, sizes 399-500 optional) and low NOx emissions (10 ppm NOx), for a package that’s easy to use and easy on the environment.
NeoTherm is built standard with the upgraded LAARS Integrated Control System that puts the ignition control, temperature control and high limit in one user-friendly device that does it all with an easy to use, large color touch screen interface.
The PID control system has outdoor reset and indirect water heater priority, frost protection, and loads of other features. It seamlessly integrates with building automation systems and can easily become part of multiple boiler sequencing, including a cascading feature that rotates load across up to eight NeoTherms to optimize boiler life without the need for additional system controls.
Available for natural or propane gas, with a selection of factory mounted options, and 6 sizes ranging from 285 to 850 MBH, these indoor models are suitable for a broad variety of residential and commercial applications.
• Large, easy to navigate color touch screen
• Easy to use menus for login, quick start, advanced setup, tests and diagnostics
• Integrated PID temperature and ignition control
• Accepts 4-10mA or 0-10VDC input for modulation
• Lead Lag with up to 8 other NeoTherm boilers
• Quick start feature for easy one boiler setups
• Outdoor reset with customizable reset curves, DHW override and warm weather shutdown
• Complete diagnostics for analog and digital inputs
• Test feature allows for forced min and max firing
• Display holds, alerts and errors in clear text form
• Password protected parameters for installer use
NEOTHERM INTEGRATED CONTROLS FEATURES:
Dimensions are nominal.*NeoTherm is shipped with adapters for the air and vent.
285
399
500
600
750
850
25
25
25
25
25
25
64
64
64
64
64
64
WSize in. cm
263/4311/2373/4373/451
551/4
68
80
96
96
130
130
Lin. cm
201/425
301/4293/4351/2393/4
52
64
77
76
90
101
Ain. cm
71/451/451/45
6
6
19
13
13
13
15
15
Bin. cm
193/4193/4193/4191/2191/2191/2
41/441/441/441/451/451/4
111/4143/4151/215
19
19
131/2181/220
20
401/2443/4
14
191/4201/2
3
31/431/2
381/4381/4381/4381/4381/4381/4
15
161/219
19
19
19
17
213/426
26
303/435
183/4183/4183/4183/4183/4183/4
13
13
13
81/481/481/4
50
50
50
50
50
50
Cin. cm
11
11
11
11
13
13
Din. cm
29
37
38
38
48
48
Ein. cm
34
47
51
51
103
114
Fin. cm
36
49
52
8
8
9
Gin. cm
97
97
97
97
97
97
Hin. cm
38
42
48
48
48
48
Jin. cm
43
55
66
66
78
89
Kin. cm
48
48
48
48
48
48
Min. cm
33
33
33
21
21
21
Nin. cm
41/241/241/241/241/241/2
11
11
11
11
11
11
Air Inlet*in. cm
41/241/241/241/261/261/2
11
11
11
11
17
17
Vent*in. cm
Setpoints
23.75v4-20mA
OPENDHW
121˚FOutlet
72˚F
Demand Central Heat Firing Rate 100%
Setpoint 160˚F
Burner State Run
Inlet
Modulation
Demand rate
Limited rate
Override rate
Diagnostics DetailsOperationConfigure
Alert 228 Warm weather shutdown was not checked due to invalid outdoor temperature.
100%
NIone
None
136˚FStack
LOCALOutdoorOPEN
Flame
Dimensional Data
Efficiency Data
AFUE %
95.0
N/A
N/A
N/A
N/A
N/A
285
399
500
600
750
850
N/A
96.5
95.0
95.3
96.6
95.7
ThermalEfficiency %
N/A
96.5
95.0
96.0
96.6
95.7
CombustionEfficiency %
285,000
399,900
500,000
600,000
750,000
850,000
83.5
117.2
146.4
175.7
219.8
248.9
264,000
386,000
475,000
572,000
724,000
813,000
77.4
113.1
139.2
167.6
212.1
238.2
11/2"11/2"11/2"11/2"2"2"
3/4"3/4"1"1"
11/2"11/2"
136
165
190
193
218
228
299
364
419
426
481
503
InputBTU/h kW
OutputBTU/h kW
Connection Size (NPT)ShippingWeight
Water Gas lbs. kgSize
LAARS® NEOTHERM
®
HYDRONIC BOILER
Standard Equipment:• High condensing efficiency• Modulation down to 20% of full fire
(5:1 turndown)• Sealed combustion chamber• Stainless Steel Heat Exchanger• Pre-mix stainless steel burner• Low NOx system (10ppm) exceeds
the most stringent regulations for air quality
• Horizontal or vertical direct vent• Horizontal vent and air terminals• Vent and air pipe lengths of up to
100 equivalent feet (each)• Built-in condensate trap• Vent temperature cutoff feature
• Integrates with Building Automation Systems
• Spark ignition system• 160 psi maximum working pressure• Stainless steel heat exchanger with
welded construction (no gaskets)• ASME “H” stamp• 75 psi (517 kPa) ASME rated
pressure relief valve• Temperature & pressure gauge• Drain valve• Multiple pump control for boiler
pump, system pump and indirect domestic water pump, each with delay
• Connections from top of unit• ENERGY STAR® for 285 size only
• Electronic PID modulating control• Large color touch screen• Alarm output• Accepts external 4-20mA
modulation control (0-10V optional)• Indirect water heater priority
with sensor• Outdoor reset with sensor• On/off toggle switch• Manual reset high limit• Burner sight glass• Zero clearance to combustible
surfaces for alcove and closet installations
• 10 year limited warranty
LAARS® NEOTHERM®
Hydronic BoilerNeoTherm is a direct vent, sealed combustion, condensing boiler with thermal efficiency as high as 96.6% that modulates with a 5 to 1 turndown. The boiler features an ASME stainless steel heat exchanger, boiler pump (size 285 only, sizes 399-500 optional) and low NOx emissions (10 ppm NOx), for a package that’s easy to use and easy on the environment.
NeoTherm is built standard with the upgraded LAARS Integrated Control System that puts the ignition control, temperature control and high limit in one user-friendly device that does it all with an easy to use, large color touch screen interface.
The PID control system has outdoor reset and indirect water heater priority, frost protection, and loads of other features. It seamlessly integrates with building automation systems and can easily become part of multiple boiler sequencing, including a cascading feature that rotates load across up to eight NeoTherms to optimize boiler life without the need for additional system controls.
Available for natural or propane gas, with a selection of factory mounted options, and 6 sizes ranging from 285 to 850 MBH, these indoor models are suitable for a broad variety of residential and commercial applications.
• Large, easy to navigate color touch screen
• Easy to use menus for login, quick start, advanced setup, tests and diagnostics
• Integrated PID temperature and ignition control
• Accepts 4-10mA or 0-10VDC input for modulation
• Lead Lag with up to 8 other NeoTherm boilers
• Quick start feature for easy one boiler setups
• Outdoor reset with customizable reset curves, DHW override and warm weather shutdown
• Complete diagnostics for analog and digital inputs
• Test feature allows for forced min and max firing
• Display holds, alerts and errors in clear text form
• Password protected parameters for installer use
NEOTHERM INTEGRATED CONTROLS FEATURES:
Dimensions are nominal.*NeoTherm is shipped with adapters for the air and vent.
285
399
500
600
750
850
25
25
25
25
25
25
64
64
64
64
64
64
WSize in. cm
263/4311/2373/4373/451
551/4
68
80
96
96
130
130
Lin. cm
201/425
301/4293/4351/2393/4
52
64
77
76
90
101
Ain. cm
71/451/451/45
6
6
19
13
13
13
15
15
Bin. cm
193/4193/4193/4191/2191/2191/2
41/441/441/441/451/451/4
111/4143/4151/215
19
19
131/2181/220
20
401/2443/4
14
191/4201/2
3
31/431/2
381/4381/4381/4381/4381/4381/4
15
161/219
19
19
19
17
213/426
26
303/435
183/4183/4183/4183/4183/4183/4
13
13
13
81/481/481/4
50
50
50
50
50
50
Cin. cm
11
11
11
11
13
13
Din. cm
29
37
38
38
48
48
Ein. cm
34
47
51
51
103
114
Fin. cm
36
49
52
8
8
9
Gin. cm
97
97
97
97
97
97
Hin. cm
38
42
48
48
48
48
Jin. cm
43
55
66
66
78
89
Kin. cm
48
48
48
48
48
48
Min. cm
33
33
33
21
21
21
Nin. cm
41/241/241/241/241/241/2
11
11
11
11
11
11
Air Inlet*in. cm
41/241/241/241/261/261/2
11
11
11
11
17
17
Vent*in. cm
Setpoints
23.75v4-20mA
OPENDHW
121˚FOutlet
72˚F
Demand Central Heat Firing Rate 100%
Setpoint 160˚F
Burner State Run
Inlet
Modulation
Demand rate
Limited rate
Override rate
Diagnostics DetailsOperationConfigure
Alert 228 Warm weather shutdown was not checked due to invalid outdoor temperature.
100%
NIone
None
136˚FStack
LOCALOutdoorOPEN
Flame
Dimensional Data
Customer Service and Product Support: 800.900.9276 • Fax 800.559.1583Headquarters: 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.33559 Brigden Gate, Halton Hills, Ontario, Canada, L7G 0A3 • 905.203.0600 • Fax 905.636.0666
www.LAARS.com Litho in U.S.A. © Laars Heating Systems Co. 1506 Document 1215l
A S M E
H
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