SMART TOUCH 1.5 Boiler Product Line Brochure

User Manual: SMART TOUCH 1.5

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Boiler
Product Line
Brochure

Lochinvar, LLC
300 Maddox Simpson Parkway
Lebanon, Tennessee 37090
Customer Assurance Inquiries (Equipment & Parts Order Inquiry)
Please contact 877-554-5544
Technical Service Inquiries
(Please have model and serial number available)
Please contact 800-722-2101
General Inquiries
615-889-8900/F: 615-547-1000

www.Lochinvar.com

Contents
From the Solution to the CREST , Lochinvar Boilers are noted for their range
of benefits and application flexibility. Collectively, they represent the most
complete product line in the industry. From a company with a long history of
innovation and a reputation for excellence.
TM

®

You’ll find there’s a Lochinvar product for any application imaginable – from
standard residential units to state-of-the-art commercial products. And with
selection, comes opportunity.
In fact, the diversity and performance of our product line is surpassed only
by its quality–in design, construction, and training. A commitment that is
reinforced by the Lochinvar Tech Center, Lochinvar U, a state-of-the-art testing
and training facility equipped with the very latest in CAD/CAM technology and
a comprehensive R&D lab.
Quality, efficiency, features, service, and selection. For more than 90 years,
these have been the hallmarks of Lochinvar products.
Lochinvar...The innovator in boiler technology.

This emblem means a product has a NOx
rating which exceeds the requirements of
the South Coast Air Quality Management
District and Texas Commission of
Environmental Quality.

This emblem means the Stack Frame is
available for use with that product.
See page 31 for details.

This catalog is designed to provide a convenient, condensed overview of the entire Lochinvar boiler product
line. For a complete list of features, specifications and technical data on a particular product, see the full line
catalog, your local distributor or contact Lochinvar. Every Lochinvar product is designed and built to meet
or exceed the fuel efficiency and safety standards of one or more of these agencies, wherever applicable.

CREST® (FBN0751-2001)

1

CREST® (FBN2500-6000)

3

FTXLTM

5

KNIGHT® XL

7

Power-Fin® (PBN2500-5000)

9

Power-Fin® (PBN0502-2001)

11

Copper-Fin II®

13

Copper-Fin®

15

Copper-Fin® Atmospheric 17
KNIGHT®

19

KNIGHT Fire Tube Floor

21

KNIGHT Fire Tube Wall

23

NOBLE™

25

Cadet®

27

SolutionTM

29

Buffer Tanks/
Hydraulic Separators

31

Squire® Buffer Tank

32

Squire® Indirect

33

Stack Frame

35

Electric Boilers

37

Low Temperature Valve

39

96.2% Thermal Efficiency
With the exclusive “Wave” fire-tube design, advancements in Lochinvar combustion technology and
the SMART TOUCH™ control, CREST changed how the industry thinks about fire-tube boilers.
Now, six new CREST boilers, with 750,000, 1.0 million, 1.25 million, 1.5 million, 1.75 million and
2.0 million Btu/hr inputs, deliver 96.2% thermal efficiency.

The Crest Combustion System
CREST boilers are equipped with a top-mounted micro-metal
fiber burner, engineered specifically for fire-tube technology.
The system is designed to ensure smooth, quiet modulating
combustion from as low as 4% of maximum firing rate up
to 100% as the heating load increases. And in multi-boiler
applications, modulation is an essential element in cascade
sequencing, which helps ensure maximum efficiency and
long-term reliability.

Reduce Installation Costs with Variable
Flow Technology
CREST can operate over a wide range of flow rates with
very low pressure drop. This permits installation of a full
flow (variable primary) system. Installation is streamlined,
without the time and materials cost of primary/secondary piping, and pumps needed to maintain
flow in a water-tube boiler. Variable flow also makes CREST more flexible at handling frequent
fluctuations in the system flow rate.

Smooth-Running, Modulating Combustion
With up to 25:1 Modulation Turndown, CREST automatically changes the firing rate as building heat loads vary. An FBN-2001 fires
at its maximum 2,000,000 Btu/hr rate when the heat load is highest, and then gradually turns down to as low as 4% (80,000 Btu/hr)
as the load decreases. A modulating system runs smoothly and efficiently, without frequent on/off cycling. When the system is zoned,
CREST’s high turndown works to match the actual system demand. In return, CREST reduces the customer’s fuel bill and provides
better comfort by load-matching the heat loss of the system.

Built-in Cascading Sequencer

1

2

3

4

5

6

7

Cascade Redundancy provides peace of mind because it helps ensure that a CREST
boiler system will always deliver reliable performance with no downtime. If the lead
boiler is turned off for maintenance, Cascade Redundancy automatically shifts the
lead role to the second sequenced boiler. Up to eight CREST boilers can be sequenced
using a 2-wire daisy chain connection. Cascade sequencing can be programmed for
8 Lead-Lag or Efficiency Optimized operation.

With Lead-Lag operation, one lead boiler modulates to capacity on demand. As the load increases, the system then cascades to
additional lag boilers in sequence. The first-on role shifts daily, distributing equal runtimes to each unit.
In an Efficiency Optimized system, all boilers fire and modulate simultaneously
at the same Btu/hr input rates, maximizing thermal efficiency.

Unequaled Control and Monitoring
Crest features the next generation of Lochinvar’s all-in-one SMART TOUCH
operating control with the integration of the CON·X·US® advanced technology.
SMART TOUCH with CON·X·US provides outstanding functionality and can be
integrated directly into building automation systems via Modbus or BACnet
MSTP as standard equipment.
And now, the CON·X·US mobile communication platform allows SMART
TOUCH to go where no other boiler has gone before. CON·X·US provides the
ability to monitor and manage multiple Crest boiler plants without ever stepping
into mechanical rooms.
1

CREST® Boiler Dimensions & Specifications
LOW
VOLTAGE

HIGH
VOLTAGE

RELIEF
VALVE

HIGH
VOLTAGE

H

LOW
VOLTAGE

VENT

WATER
OUTLET

78"

GAS

C

B

AIR

L

F

DRAIN

D

CONDENSATE
DRAIN

WATER
INLET

DRAIN
E

K

11 3/8"

11 1/4"

12 1/2"

G
A

J
SIDE
Net
AHRI
AHRI
Thermal Output Rating
Min Max Efficiency MBH MBH Turndown

BACK

Input MBH

Model
Number

A

B

C

D

E

TOP

F

G

H

J

K

L

Water
Gas Inlet/ Air
Vent
Conn. Outlet Intake Size

Oper.
Weight

Ship.
Wt.
(lbs)

FBN0751

50

750

96.2%

722

627

15:1

30” 49-1/2” 51”

13”

8-3/4”

23-3/4” 26-3/4” 7-3/8” 57-5/8” 11-7/8” 66-1/8” 1-1/4”

3”

6”

6”

1,768

1,560

FBN1001

50

1,000

96.2%

962

837

20:1

30” 49-1/2” 51”

13”

8-3/4”

23-1/8” 26-3/4” 6-1/2” 57-5/8” 11-7/8” 66-1/8” 1-1/4”

3”

6”

6”

1,838

1,596

FBN1251

63

1,250

96.2%

1,203

1,046

20:1

30” 49-1/2” 51-3/8” 13”

8-3/4”

21-5/8” 26-3/4” 6-1/2” 57-3/4” 11-7/8” 66-1/8” 1-1/4”

3”

6”

8”

1,975

1,648

FBN1501

60

1,500

96.2%

1,443

1,255

25:1

30” 59-1/4” 62-3/8” 15-7/8” 9”

27-7/8” 26-7/8” 5-1/8” 68”

12-3/8” 65-3/8” 1-1/2”

4”

8”

8”

2,307

1,961

FBN1751

70

1,750

96.2%

1,684

1,464

25:1

30” 58-3/4” 61-1/2” 15-7/8” 9”

27-1/8” 27”

5-1/8” 68”

12-3/8” 65-3/8” 1-1/2”

4”

8”

8”

2,458

2,017

FBN2001

80

1,999

96.2%

1,924

1,673

25:1

30” 58-3/4” 61-1/2” 15-7/8” 9”

26-3/4” 27”

5-1/8” 68”

12-3/8” 65-3/8” 1-1/2”

4”

8”

8”

2,570

2,087

NOTES: Change "N" to "L" for LP gas models. Indoor installation only. *Information subject to change without notice

Smart Touch™ Features
CON·X·US Remote Connect
SMART TOUCH Touchscreen Operating Control
Full-Color 8" Touchscreen LCD Display
Built-in Cascading Sequencer for up to 8 Boilers with
Built-in Redundancy
> Cascade Multiple Sized Boilers
> Lead/Lag Cascade
> Efficiency Optimized Cascade
Front-End Loading Capability with Copper-Fin II® and
Power-Fin® Boilers
Building Management System Integration with
0-10 VDC Input
BACnet MSTP and Modbus Communications
Outdoor Reset Control with Outdoor Air Sensor
Password Security
Domestic Hot Water Prioritization
> DHW tank piped with priority in the boiler loop
> DHW tank piped as a zone in the system with the
> pumps controlled by the Smart System
> DHW Modulation Limiting
> Separately Adjustable SH/DHW Switching Times
Low Water Flow Safety Control & Indication
Inlet & Outlet Temperature Readout
Freeze Protection
Service Reminder
Time Clock
Data Logging
> Hours Running, Space Heating
> Hours Running, Domestic Hot Water
> Hours Running, Modulation Rate
> Ignition Attempts
> Last 10 Lockouts
Programmable System Efficiency Optimizers
> Night Setback
> Anti-Cycling
> Outdoor Air Reset Curve
> Ramp Delay
> Boost Temperature & Time
> Modulation Factor Control
®

Three Pump Control
> System Pump
> Boiler Pump
> Domestic Hot Water Pump
High-Voltage Terminal Strip
> 120 VAC / 60 Hertz / 1 Phase Power Supply
> System Pump, Boiler Pump and DHW Pump Power
Low-Voltage Terminal Strip
> 24 VAC Auxiliary Device Relay
> Auxiliary Proving Switch Contacts
> Alarm on Any Failure Contacts
> Runtime Contacts
> DHW Thermostat Contacts
> Unit Enable/Disable Contacts
> System Sensor Contacts
> DHW Tank Sensor Contacts
> Outdoor Air Sensor Contacts
> Cascade Contacts
> 0-10 VDC BMS External Control Contact
> 0-10 VDC Variable Speed Boiler Pump Control Contact

Optional Equipment
Wireless Outdoor Temperature Sensor
Alarm Bell
BMS Gateway - BACnet IP or LonWorks
Condensate Neutralization Kit
Common Vent Kits
Electrical Options (Shipped Loose):
> 208V/3Ø/60Hz
> 480V/3Ø/60Hz
> 600V/3Ø/60Hz
Motorized Isolation Valve
Variable Speed Boiler Pump
Gas Regulator

Codes & Registrations

Standard Features
96.2% Thermal Efficiency (AHRI)
Up to 99% Thermal Efficiency in Low-Temp. Applications
Modulating Burner with up to 25:1 Turndown
Direct-Spark Ignition
Low-NOx Operation
Sealed Combustion
Air Inlet Filter w/Replacement Reminder
Low Gas Pressure Operation
Vertical and Horizontal Direct Venting
> Direct Vent up to 100 Feet
> PVC, CPVC, Polypropylene or AL29-4C
ASME “H” Stamped Heat Exchanger
316L Stainless Steel Fire Tubes
160 psi Working Pressure
On/Off Switch
Adjustable High Limit with Manual Reset
Low Water Cutoff with Manual Reset & Test
High & Low Gas Pressure Switches w/Manual Reset
Low Air Pressure Switches
Condensate Trap w/Blocked Drain Switch
Drain Valve
System Sensor
Outdoor Air Sensor
Inlet & Outlet Temperature Sensors
High-Voltage Terminal Strip
Low-Voltage Terminal Strip
Downstream Gas Test Cocks
50 psi ASME Relief Valve
Temperature & Pressure Gauge
Zero Clearances to Combustible Materials
10-Year Limited Warranty (See Warranty for Details)
1-Year Warranty on Parts (See Warranty for Details)

ANSI Z21.13/CSA Certified
ASME Certified, “H” Stamp / National Board
California Code Compliant
CSD1 / Factory Mutual / GE Gap Compliant
AHRI Certified
Canadian Registration Number (CRN)

2

Up to 93% Thermal Efficiency
Lochinvar® has taken the fire-tube concept in an innovative direction with the
CREST® modulating-condensing boiler. With sizes that range from 2.5 to 5.0 million Btu/
hr, you have the opportunity to utilize Lochinvar leading-edge technology in your largest
applications. With thermal efficiencies up to 99% in low water temperature applications,
CREST is positioned to provide exceptional energy-saving performance.
The advanced CREST introduces a combustion system with a unique burner design with
up to 20:1 turndown. The burner fires into an array of 316L stainless steel fire-tubes that
transfer the heat to the surrounding water with exceptionally high efficiency.
CREST communicates seamlessly and in real time with building management systems by
utilizing an on-board Modbus protocol and BACnet MSTP. The SMART TOUCH control
with CON·X·US® has a built-in cascading component that communicates with up to eight
units, providing total command without an external control or complex and expensive control
logic programming by the BMS integrator.

93%

With the added feature of CON·X·US remote connectivity, the CREST boiler can be
monitored from anywhere even if your building does not have a building management
system. Innovative fire-tube boiler technology integrated with our SMART TOUCH™
operating control makes CREST a genuine game-changer among commercial boilers.

Advanced Negative Regulation Technology
CREST safely and reliably operates with supply gas
pressure as low as 4 inches water column. Because
Negative Regulation (Neg/Reg) technology draws fuel
gas into a pre-mix combustion system instead of relying on utility pressure through the gas valve,
operation is steady in low gas pressure systems or when peak demands occur on supply lines. Plus,
Neg/Reg automatic fan speed control fine-tunes the correct fuel/air ratio entering the burner, providing
even, consistent combustion for a cleaner burning flame achieving high combustion efficiency.

Fully Modulating up to 20:1 Turndown
20:1 turndown means the burner can fire at a rate as low as 5% of its maximum input. For example,
a 2.5 million Btu/hr CREST unit can modulate from 125,000 up to 2,500,000 Btu/hr depending on
demand. High turndown greatly reduces “short cycling” when demand is low. All boiler systems are
designed to provide enough heat to maintain a facility’s heat loss on the coldest days. When the
system is zoned, the CREST’s high turndown works to match the actual system demand and, in
return, reduces the customer’s fuel bill and provides better comfort by load matching the heat loss
of the system. Greater seasonal efficiencies will be realized due to the extremely large turndown
offered by CREST.

As Low As 25 GPM* to Full 350 GPM Flow Rates
CREST allows system designers tremendous flexibility to vary the flow rate through the boiler. It can service systems that operate
with widely fluctuating flow rates depending on demand. CREST can be installed with primary/secondary piping or in a full-flow
arrangement. Typical design techniques include full-flow systems or variable flow systems using variable frequency drives on the
heating water pumps. In either case, CREST excels in these applications and allows the flow through the boiler to vary based on
system demand. * 25 GPM min. flow on FB2500 model, 50 GPM on FB5000 model.

Built-in Cascading Sequencer
Sequences up to an 8-boiler system using simple 2-wire daisy chain connection, eliminating cost and uncertainty of a separate “third
party” sequencer. On demand, one boiler functions as the leader and modulates to capacity. Increasing load then “cascades” to
additional “lag” boilers in sequence as needed. Lead-lag rotation shifts “first on” boiler role every 24 hours, distributing equal leadlag runtimes to each unit.

Boiler Control from Anywhere
Crest features the next generation of Lochinvar’s all-in-one SMART TOUCH operating control with the
integration of the CON·X·US advanced technology. SMART TOUCH with CON·X·US provides outstanding
functionality, and can be integrated directly into building automation systems via Modbus and BACnet MSTP
as standard equipment.

®
REMOTE CONNECT

And now, the CON·X·US mobile communication platform allows the SMART TOUCH to go where no other boiler has gone before.
CON·X·US provides the ability to monitor and manage multiple Crest boiler plants without ever stepping into the mechanical rooms.
3

CREST® Boiler Dimensions & Specifications
H
LOW
VOLTAGE

HIGH
VOLTAGE

RELIEF
VALVE

HIGH
VOLTAGE
LOW
VOLTAGE
VENT

WATER
OUTLET

B
80"

C

AIR

L
GAS

WATER
INLET
D

14-7/8"
10 -1/4"

8"

J

E

11"

G

CONDENSATE
DRAIN

K

SIDE

Crest Heating Boiler

F

DRAIN

DRAIN

BACK

A

TOP

Dimensions and Specifications

												
Model Input Input AHRI		 NET AHRI
											
Gas Air Vent Oper.
Ship
Number MBH MBH Thermal Output Rating
B
C
D
E
F
G
H
J
K Conn. Inlet Size Wt. (lbs) Wt. (lbs)
Min. Max. Efficiency MBH MBH Turndown A
34-1/4" 76-3/8" 70-1/4" 17-3/4" 26-1/8" 9-3/4" 27-3/8" 11-3/8" 78"
83"
2"
8” 9”
3,652
2,560
FBN2500 125 2,500 92.0% 2,300 2,000
20:1
40-1/2" 83-5/8" 76-3/8" 17-3/8" 31-3/8" 9-7/8" 34-3/4" 11-1/2" 82-1/8" 87-1/8" 2"
10” 10” 4,126
2,920
FBN3000 150 3,000 92.0% 2,760 2,400
20:1
40-1/2" 83-1/4" 75-5/8" 17-1/4" 31-3/8" 9-7/8" 34-3/4" 12-7/8" 81-1/8" 86-1/8" 2"
10” 10” 4,744
3,225
FBN3500 200 3,500 92.0% 3,220 2,800
18:1*
53-1/2" 109" 100-3/4" 31-1/4" 40-3/4" 14-1/2" 45-3/4" 12-3/4" 104-1/2" 108-1/4" 2-1/2" 12” 12” 6,900
4,750
FBN4000 335 4,000 93.0% 3,720 3,235
12:1
53-1/2" 107" 100-3/4" 28"
40-3/4" 11"
45-1/2" 12-3/4" 104"
108-1/4" 2-1/2" 14” 14” 8,000
5,550
FBN5000 500 5,000 93.0% 4,650 4,043
10:1
53-1/2” 107 100-3/4” 28”
40-3/4” 11
45-1/2” 9”
104”
108-1/4” 2-1/2” 14” 14” 8,100
5,650
FBN6000 600 6,000 92.0% 5,520 4,799
10:1
Notes: Indoor installation only. All information subject to change. Change "N" to "L" for LP gas models. For Low NOx on FB2500 - FB5000 models, consult factory.
*Turndown rate reduced on LP gas model.

Smart Touch™ Features
CON·X·US Remote Connect
SMART TOUCH Touchscreen Operating Control
Full-Color 8” Touchscreen LCD Display
Built-in Cascading Sequencer for up to 8 Boilers
> Cascade Multiple Sized Boilers
> Lead/Lag Cascade
> Efficiency Optimized Cascade
Front-End Loading Capability with Copper-Fin II
and Power-fin Boilers
Building Management System Integration with
0-10 VDC Input
BACnet MSTP and Modbus Communications
Outdoor Reset Control with Outdoor Air Sensor
Password Security
Domestic Hot Water Prioritization
> DHW tank piped with priority in the boiler loop
> DHW tank piped as a zone in the system with the
pumps controlled by the Smart System
> DHW Modulation Limiting
> Separately Adjustable SH/DHW Switching Times
> Low Water Flow Safety Control & Indication
> Inlet & Outlet Temperature Readout
> Freeze Protection
> Service Reminder
> Time Clock
Data Logging
>		Hours Running, Space Heating
>		Hours Running, Domestic Hot Water
>		Hours Running, Modulation Rate
>		Ignition Attempts
>		Last 10 Lockouts
Programmable System Efficiency Optimizers
>		Night Setback
>		Anti-Cycling
>		Outdoor Air Reset Curve
>		Ramp Delay
>		Boost Temperature & Time
Three Pump Control
>		System Pump
>		Boiler Pump
>		Domestic Hot Water Pump

High-Voltage Terminal Strip
> 120 VAC / 60 Hertz / 1 Phase Power Supply (FB25003500)
> 208 VAC / 60 Hertz / 3 Phase Power Supply (FB40005000)
> System Pump, Boiler Pump and DHW Pump Power
Low-Voltage Terminal Strip
> 24 VAC Auxiliary Device Relay
> Auxiliary Proving Switch Contacts
> Alarm on Any Failure Contacts
> Runtime Contacts
> DHW Thermostat Contacts
> Unit Enable/Disable Contacts
> System Sensor Contacts
> DHW Tank Sensor Contacts
> Outdoor Air Sensor Contacts
> Cascade Contacts
> 0-10 VDC BMS External Control Contact

Standard Features

Up to 93% Thermal Efficiency (AHRI)
Up to 99% Thermal Efficiency in Low
Temperature Applications
Modulating Burner with up to 20:1 Turndown
Direct-Spark Ignition
Sealed Combustion
Low Gas Pressure Operation
Vertical or Horizontal Venting
Category IV Venting up to 100 Feet
ASME “H” Stamped Heat Exchanger
316L Stainless Steel Fire Tubes
160 psi Working Pressure
On/Off Switch
Adjustable High Limit with Manual Reset
Low Water Cutoff with Manual Reset & Test
High & Low Gas Pressure Switches
w/Manual Reset
Low Air Pressure Switches
Condensate Trap w/ Blocked Drain Switch
Drain Valve
System Sensor
Outdoor Air Sensor
Inlet & Outlet Temperature Sensors

High Voltage Terminal Strip
Low Voltage Terminal Strip
Downstream Gas Test Cocks
50 psi ASME Relief Valve
Temperature & Pressure Gauge
Zero Clearances to Combustible Materials
10-Year Limited Warranty
(See Warranty for Details)
1-Year Warranty on Parts
(See Warranty for Details)

Optional Equipment

Alarm Bell
BMS Gateway - BACnet IP or LonWorks
Condensate Neutralization Kit
Common Vent Damper
Dual Fuel Gas Train
Electrical Options (Shipped Loose):
> 208V/3Ø/60Hz (Models FB2500-3500 only)
> 480V/3Ø/60Hz
		 > 600V/3Ø/60Hz
Motorized Two Way Valve
Variable Speed Boiler Pump
Gas Regulator
Inline Air Filter

Codes & Registrations

ANSI Z21.13/CSA Certified
ASME certified, “H” Stamp / National Board
California Code Compliant
CSD1 / Factory Mutual / GE Gap Compliant
Canadian Registration Number (CRN)
AHRI Certified
U.S. Patent # 8,286,594

4

The New 98% Standard

Lochinvar re-defined the fire-tube boiler category with its
KNIGHT® Wall-Mount and CREST® lines. For residential and
light commercial applications, the FTXL™ adds models from
399,999 to 850,000 Btu/hr, and takes Lochinvar’s fire-tube
technology to the next level. FTXL offers best-in-class AHRI
Thermal Efficiency and footprints, plus remote connectivity
that puts the SMART SYSTEM™ control at your fingertips,
anywhere!

Reduce Installation Cost with
Variable Flow Technology

FTXL can operate over a wide range of flow rates with very
low pressure drop. This permits installation of a “full flow”
(variable primary) system eliminating the time and materials cost
of primary/secondary piping, and pumps needed to maintain flow
in a water-tube boiler. Variable flow also makes FTXL more
flexible at handling frequent fluctuations in the system flow rate.

Smooth-Running,
Modulating Combustion

FTXL boilers have a top-mounted,
micrometal fiber burner, with a blower/
gas valve assembly that drives heat energy
downward, through stainless steel fire
tubes, with exhaust venting through the
bottom of the unit. With up to 10:1
modulation turndown, the burner
automatically changes its firing rate as
building heat loads vary. An FTX500
fires at its maximum 500,000 Btu/hr rate
when heat load is highest, then gradually
“turns down” to as low as 10% (50,000
Btu/hr) as load decreases. A modulating
system runs smoothly and efficiently,
without frequent on/off cycling.

Minimum Supply Pressure, Installer-Friendly

FTXL operates with supply gas pressure as low as 4 inches
water column. Negative Regulation draws gas into a pre-mix
combustion system, instead of relying on utility pressure through
the gas valve. The result is steady operation in low gas pressure
systems or when peak demand occurs on gas supply. Automatic
fan speed control fine-tunes the correct fuel/air ratio entering the
burner, providing superior combustion throughout the entire
operating range.

Cascade Sequencing

Up to eight FTXL boilers can be sequenced using a 2-wire
daisy chain connection. Cascade sequencing can be programmed
for “Lead-Lag” or “Efficiency Optimized” operation. With LeadLag operation, one lead boiler modulates to capacity on demand.
As load increases, the system then cascades to additional lag
boilers in sequence. The first-on role shifts daily, distributing
equal runtimes to each unit. In an Efficiency Optimized system,
all boilers fire and modulate simultaneously at the same BTU/hr
input rates, maximizing thermal efficiency.
5

Boiler Plant Control, from Anywhere

FTXL features the next generation of Lochinvar’s
all-in-one SMART SYSTEM operating control with a
re-designed multi-color LCD interface. SMART
SYSTEM provides outstanding functionality, and can be
integrated directly into a building automation system via
ModBus and other communications protocols. And now,
the CON·X·US mobile communication platform allows
SMART SYSTEM to go where no other boiler has gone
before.†
CON·X·US
provides the ability
®
to monitor and
manage multiple
REMOTE CONNECT
FTXL boiler plants without ever stepping into the
mechanical room. CON·X·US will send alerts via text or
e-mail notifying of changes in system status, and
anytime, from anywhere, a user can check system status
and re-program any boiler function.
Once downloaded, the free CON·X·US mobile
application allows for remote access to all SMART
SYSTEM functions using any Internet-capable device.

†CON·X·US control board
sold separately.

FTXL™ Boiler Dimensions & Specifications
E
Air Inlet

D

Electrical Connections

C

2-1/2"

A
Gas Connection

F
53-1/2"

G

65-1/2"

B

Water Outlet

40"

Water Inlet
Flue Connection

H

26-1/4"

Model
Number
FTX400(N,L)
FTX500(N,L)
FTX600(N,L)
FTX725(N,L)
FTX850(N,L)

26-1/4"

9-3/4"

2-1/2"

Condensate Connection

Input
AHRI		
NET AHRI			
HEX
Min Max Thermal Output Rating Turn Flow (GPM) Water
MBH MBH Efficiency MBH
MBH down Min Max Volume
40.0 399.9 98.0% 392
341
10:1
10
105
13
50.0 500.0 97.7% 489
425
10:1
15
105
12
85.0 600.0 97.5% 585
509
7:1
15
105
12
103.5 725.0 97.2% 705
613
7:1
20
150
17
121.5 850.0 97.0% 825
717
7:1
25
150
16

A

22-1/2"

												
									
Water Vent
Air
A
B
C
D
E
F
G
H
Conn. Size Intake
30-1/2" 27-1/2" 10-1/4" 17"
23-1/4" 46-1/4" 39-1/2" 10-3/4” 2"
4”
4”
30-1/2" 27-1/2" 10-1/4” 17"
23-1/4" 46-1/4" 39-1/2” 10-3/4” 2"
4”
4”
30-1/2" 27-1/2" 10-1/4” 17"
23-1/4" 46-1/4" 39-1/2” 10-3/4” 2"
4”
4”
33”
28-1/2" 10-1/2” 17-1/2" 23-1/2" 48-1/2" 41-1/4” 11"
2-1/2" 6”
4”
33"
28-1/2" 10-1/2” 17-1/2" 23-1/2" 48-1/2" 41-1/4" 11"
2-1/2" 6”
4”

Gas
Ship
Conn. Wt. (lbs)
1”
435
1”
460
1”
470
1”
510
1”
535

*Information subject to change without notice
Dimensions are in inches. Select “N” or “L” for Natural or LP gas

Smart System Features
> Smart System Digital Operating Control
Multi-Color Graphic LCD Display w/Navigation Dial
> Loch-N-Load USB Thumb Drive Port for Easy
Programming
> Cascading Sequencer with Built-in Redundancy
Selectable Cascade Type:
Lead Lag/Efficiency Optimization
Multiple Size Boilers
Front-End Loading
> 3 Reset Temperatures Inputs w/Independent
Outdoor Reset Curves for Each
Outdoor Sensor
> Four-Pump Control
System Pump with Parameter for Continuous
Operation
Boiler Pump with Variable-Speed Control
Domestic Hot Water Boiler Pump
Domestic Hot Water Recirculation Pump Control
with Sensor
> Building Management System Integration
0-10 VDC Input to Control Modulation or Setpoint
0-10 VDC Input from Variable-Speed System Pump
0-10 VDC Modulation Rate Output Signal
0-10 VDC Enable/Disable Signal
> Programmable System Efficiency Optimizers
Space Heating Night Setback
DHW Night Setback
Anti-Cycling
Ramp Delay
Boost Time and Temperature
> High-Voltage Terminal Strip
120 VAC/60 Hertz/1 Phase
Pump Contacts for 3 Pumps

> Low-Voltage Terminal Strip
Building Recirculation Pump Start/Stop
Proving Switch Contacts
Flow Switch Contacts
Alarm Contacts
Runtime Contacts
3 Space Heat Thermostat Contacts
Tank Thermostat Contacts
System Sensor Contacts
Tank Sensor Contacts
Cascade Contacts
0-10 VDC BMS Contacts
0-10 VDC Boiler Rate Output Contacts
0-10 VDC Boiler Pump Speed Contacts
0-10 VDC System Pump Speed Contacts
ModBus Contacts
> Time Clock
> Data Logging
Ignition Attempts
Last 10 Lockouts
Space Heat Run Hours
Domestic Hot Water Run Hours

Standard Features
> 97%-98% Thermal Efficiency

> Modulating Burner with up to 10:1 Turndown
Direct Spark Ignition
Low NOx Operation
Sealed Combustion
Low Gas Pressure Operation
> Stainless Steel Fire-Tube Heat Exchanger
ASME-Certified, “H” Stamped
160 psi Working Pressure
50 psi Relief Valve
Combustion Analyzer Test Port
Fully Welded Design
> Vertical and Horizontal Direct Vent
Direct Vent up to 100 feet
PVC, CPVC, Polypropylene or AL29-4C
Factory Supplied Sidewall Vent Termination

> Smart System Control
> Other Features
On/Off Switch
Adjustable High Limit with Manual Reset
Automatic Reset High Limit
Manual Reset Low Water Cutoff
Flue Temperature Sensor
Low Air Pressure Switch
Temperature and Pressure Gauge
Condensate Trap
Zero Service Clearances
10-Year Limited Warranty (See Warranty)
Custom Maintenance Reminder with Contact Info
Password Security
Customizable Freeze Protection Parameters

Optional Equipment
CON·X·US Remote Connect
Motorized Isolation Valve
Wireless Outdoor Sensor
Multi-Temperature Loop Control
Variable-Speed Boiler Circulator
Constant-Speed Boiler Circulator
ModBus Communication
Alarm Bell
Condensate Neutralization Kit
Concentric Vent Kit (FTX400-FTX600)
BMS Gateway to BACnet or LonWorks
High and Low Gas Pressure Switches w/Manual
Reset(FTX500-FTX850)
> Firing Controls
M9-Standard Construction
M13-CSD-1/FM/GE Gap (FTX500-FTX850)

6

The Smartest Choice for Condensing Boiler Performance
The KNIGHT® XL, engineered with Lochinvar’s exclusive SMART SYSTEM™ control
and an array of other innovative features, places it far ahead of any commercial heating
boiler in its class. It promises and delivers ultimate ease of installation and maintenance.
With up to 94% thermal efficiency, low-NOx emissions and a fully modulating burner,
it is the best ”green choice” for today’s environmentally focused market.
Five modulating/condensing stainless steel KNIGHT XL boilers are available with
399,999–800,000 Btu/hr inputs and remarkably small space-saving footprints. All are
equipped for direct-vent installation with air intake and exhaust runs up to 100 feet using
PVC, CPVC, Polypropylene or AL29-4C vent materials. This range of choices is ideal
for light-duty applications such as small hotels, schools and office buildings. For higherdemand applications, up to eight KNIGHT XL units can be installed utilizing the built-in
cascading sequencer to deliver up to 6.4 million Btu/hr heating capacity.

Control

SMART SYSTEM provides unequalled control and monitoring functions that are easy to
understand and use.
• Multi-Color Graphic LCD Display
• Navigation Dial
• USB Port
• Modbus Capability (Optional)
• DHW Modulation Limiting
• DHW Night Setback
• Controls up to three different setpoint temperatures
• 0-10V Boiler Rate Output
• 0-10V Signal to control variable speed boiler pump
• 0-10V System Pump Signal Input*
• Heat Demand from 0-10V Input
• Installer to Program Name and Number into the Boiler
• Freeze Protection Parameters Installer Adjustable
• Separately adjustable SH/DHW Switching times*
• Installer access to BMS and ramp delay settings
*Exclusive to Lochinvar Smart System

Advanced Negative Regulation Technology

KNIGHT XL safely and reliably operates with supply gas pressure as low as 4
inches water column. Negative Regulation (Neg/Reg) technology automatically
adjusts fan speed that ensures the correct volume and mix of fuel and air
throughout the firing range.

Two-in-One Stainless Steel Heat Exchanger

A primary heat exchanger combined with a secondary heat exchanger captures
flue gas heat and condenses to utilize available latent energy. The stainless steel,
pH-tolerant design features a weld-sealed assembly with no O-rings or gaskets
and does not require special glycol. ASME Section IV approved and stamped.

Fully Modulating Burner

The SMART SYSTEM allows fully modulating combustion with 5:1 turndown.
The burner can fire as low as 20% of maximum input and modulates the firing
rate up to 100% as demand increases. The burner is a single stainless steel
assembly covered with woven steel mesh and fires in a 360° pattern along the entire length of the primary heat exchanger. This
allows the compact KNIGHT XL to exceed the capacity of units with larger multiple burners.

Direct Venting up to 100 Feet

KNIGHT XL offers 7 venting options and tremendous flexibility for placement of units within
the building, because it permits direct-vent air intake and exhaust runs up to 100 equivalent feet
using either PVC, CPVC, Polypropylene or AL29-4C stainless steel vent pipe. A sidewall vent
termination kit is shipped standard with every KNIGHT XL boiler.
7

KNIGHT XL® Boiler Dimensions & Specifications
LOW VOLTAGE
ELECTRICAL
CONNECTIONS

K

HIGH VOLTAGE
ELECTRICAL
CONNECTIONS

GAS

AIR INLET

J
INLET
39-1/2"

FLUE

I

HEAT
EXCHANGER
DRAIN
3/4" NPT

OUTLET

A

38-3/4"
CONDENSATE
DRAIN

H
FLUE
18-3/4"

13-3/4"

3-1/2"

8"

G

B
D

BACK

F

1/4" - 1-1/4"
ADJUSTABLE

E

C

FRONT

LEFT SIDE

Knight® XL Heating Boiler
Input
AHRI		
Model Min Max Thermal
Output
Number MBH MBH Efficiency
MBH
KBN400
80
399
94.0%
376
KBN501
100
500
94.0%
470
KBN601
120
600
94.0%
564
KBN701
140
700
94.0%
658
KBN801
160
800
94.0%
752

9"

Net AHRI
Rating
MBH
327
409
490
572
654

Dimensions and Specifications
												
A
B
C
D
E
F
G
H
I
J
K
Gas Water Air Vent Ship
											
Conn. Conn. Inlet Size Wt. (lbs)
42-1/2” 15-1/2”
27-3/4” 3-3/4” 20-3/4” 21” 14” 34”
34”
2”
18-3/4” 1” 1-1/2” 4” 4”
280
42-1/2” 15-1/2”
31-1/2” 3-3/4” 25-1/2” 21” 14” 32-1/2” 36”
2”
18”
1” 1-1/2” 4” 4”
310
42-1/2” 15-1/2”
36-1/4” 3-3/4” 25”
21” 14” 36”
32-3/4” 5-1/2” 19-1/2” 1” 2”
4” 4”
340
42-1/2” 15-1/2”
40-1/4” 3-3/4” 29” 23” 17” 36”
32-3/4” 3-1/4” 23-1/2” 1” 2”
4” 6”
370
42-1/2” 15-1/2”
45-1/4” 3-3/4” 33-1/4” 23” 17” 36”
32-3/4” 3-1/4” 27-3/4” 1” 2”
4” 6”
405

Notes: Indoor installation only. All information subject to change. Change “N” to “L” for LP gas models.

Standard Features

Built in Cascading Sequencer for up to 8 Boilers
		 Multiple Size Boiler Cascade
94% AHRI Certified Thermal Efficiency
		 Lead Lag
Modulating Burner with 5:1 Turndown
		 Efficiency Optimization
> Direct-Spark Ignition
		 Front End Loading with Copper-Fin II®
> Low NOx Operation
Outdoor Reset Control with Outdoor Air Sensor
> Sealed Combustion
Programmable System Efficiency Optimizers
> Low Gas Pressure Operation
		> Night Setback
ASME Stainless Steel Heat Exchanger
		> DHW Night Setback
		> Anti-Cycling
> ASME Certified, ”H” Stamped
		> Outdoor Air Reset Curve
Gasketless Heat Exchanger
		> Ramp Delay
> 160 psi Working Pressure
		> Boost Temperature & Time
> 50 psi ASME Relief Valve
Three Pump Control
> Highly efficient, condensing design
		> System Pump With Parameter for Continuous Operation
Vertical & Horizontal Direct-Vent
		> Boiler Pump With Variable Speed Pump Control
		> Domestic Hot Water Pump
> Category IV venting up to 100 feet
Domestic Hot Water Prioritization
> PVC, CPVC, Polypropylene or AL29-4C
		> DHW tank piped with priority in the boiler loop
		
Venting up to 100 Feet
		> DHW tank piped as a zone in the system with
> Factory Supplied Sidewall Vent Termination			 the pumps controlled by the Smart System
Smart SystemTM Control
		> DHW Modulation Limiting
Other Features
		> Separately Adjustable SH/DHW Switching Times*
On/Off Switch
Building Management System Integration
Adjustable High Limit w/ Manual Reset
		> 0-10 VDC Input to Control Modulation or Set Point
		> 0-10 VDC Input Signal from Variable Speed System Pump*
Automatic Reset High Limit
		> 0-10 VDC Modulation Rate Output
Flow Switch
		> 0-10 VDC Input to Enable/Disable call for heat
Flue Temperature Sensor
		> Access to BMS Settings through Display
Low Air Pressure Switch
High Voltage Terminal Strip
Temperature & Pressure Gauge
> 120 VAC / 60 Hertz / 1 Phase Power Supply
Adjustable Leveling Legs
> Three sets of Pump Contacts with Pump Relays
Condensate Trap
Low Voltage Terminal Strip
Zero Clearances to Combustible Material
24 VAC Device Relay
10 Year Limited Warranty (See Warranty)
Proving Switch Contacts
Flow Switch Contacts
Alarm on Any Failure Contacts
Smart System Features
Runtime Contacts
SMART SYSTEM Digital Operating Control
DHW Thermostat Contacts
		> Multi-Colored Graphic LCD Display w/ 		
3 Space Heat Thermostat Contacts
			 Navigation Dial
System Sensor Contacts
> Three Reset Temperature Inputs with
			 curves for three set point temperature inputs DHW Tank Sensor Contacts

Outdoor Air Sensor Contacts
Cascade Contacts
0-10 VDC BMS External Control Contact
0-10 VDC Boiler Rate Output Contacts
0-10 VDC Variable Speed System Pump Signal Input
0-10 VDC Signal to Control Variable Speed Boiler Pump

Modbus Contacts
Time Clock
Data Logging
> Hours Running, Space Heating
> Hours Running, Domestic Hot Water
> Ignition Attempts
> Last 10 Lockouts
Other Features
Low Water Flow Safety Control & Indication
Password Security
Inlet & Outlet Temperature Readout
Customizable Freeze Protection Parameters
Custom Maintenance Reminder with Contractor Info
		 *Exclusive feature, available only from Lochinvar

Optional Equipment
CON·X·US Remote Connect
Alarm Bell
Condensate Neutralization Kit
Concentric Vent Kit (KB400-KB601)
BMS Gateway - BACnet or LonWorks
High & Low Gas Pressure Switches
		 w/ Manual Reset (KB501-KB801)
Modbus Communication
Multi Temperature Loop Control
Low Water Cutoff w/Manual Reset & Test
Boiler Circulation Pump
Stainless Steel Vent Kits (KB701-KB801)
Stack Frame
Variable Speed Boiler Pump
Wireless Outdoor Sensor

Firing Control Systems

M9
Standard Construction
M7
California Code
M13
CSD1 / FM / GE Gap (KB501-KB801)
Registered under U.S. Patent # 7,824,178

8

2,500,000 to 5,000,000 Btu/hr models
A Legendary Boiler Has More Than
Doubled Its Output

In 1986, Power-Fin®
redefined the industry
with its space-saving
design, groundbreaking
efficiency and venting
flexibility. Now we’re
raising the bar again
by more than doubling
its maximum input
Starting with the introduction of Power-Fin product
capacity from 2 to 5
line in 1986, we were able to provide something
million BTU/hr. The
that other companies weren’t focused on, efficiency
Power-Fin’s new heat
and footprint. Now, 30 years later, we are proud to
continue that tradition and provide some of the most
exchanger features
efficient products on the market.
an innovative double
row of swept fins that
delivers 2.5 times the output of the original model. The PowerFin continues to offer a space-saving footprint and all models
will pass through a 36˝ wide door.*

Enhanced Operating Control

The Power-Fin now offers the industry-best
Smart Touch™ 8˝ LCD full color touchscreen with
easy-to-understand infographics. It is equipped with
CON·X·US® connectivity that lets you remotely
monitor and optimize the performance of the entire
boiler plant.

Burner Modulation Boosts Efficiency and Lowers Costs

With thermal efficiencies up to 87%, Power-Fin boilers feature a 5:1 turndown ratio that will precisely match
the firing rates to heating load requirements—at any point from 20% to full firing rate. This results in less
equipment cycling for greater efficiency and cost savings.

Ready for Outdoor Installation

In warm-weather sites where the mechanical room is overcrowded, the Power-Fin can be easily installed
either outdoors or on a rooftop. Its optional hood and screen protector make outdoor installation fast and
trouble free.

Venting Solutions

The Power-Fin offers seven venting options for ease of installation and venting flexibility to meet the most
challenging installation requirements. The Power-Fin permits air intake and exhaust lengths up to 100 ft,
allowing terminations to be horizontal through a sidewall or vertical through a roof. If floor space is limited,
the Power-Fin can be installed outdoors with the addition of the outdoor kit.

9

Power-Fin ® Boiler Dimensions & Specifications
J

K

M

B

G

N
C

P

Power-Fin Boiler

L

Dimensions and Specifications

		
										
Model								
Gas
Air
Number
H
J
K
L
M
N
P
Q
Conn.
Inlet
PBN2500
9”
20-1/4”
37”
8-3/4”
23”
21-1/4”
12”
N/A
2”
9”
PBN3000
9”
20-1/4”
43”
8-3/4”
23”
21-1/4”
12”
N/A
2”
9”
PBN3500
9”
20-1/4”
48-1/2”
9”
23”
21-1/4”
12”
N/A
2”
10”
PBN4000
10-1/2”
20”
54”
8-3/4”
22-1/4”
21-1/4”
12”
58-1/2”
2-1/2”
10”
PBN5000
11”
23-1/2”
65-1/2”
11-1/2”
22”
24”
13-1/4”
69-1/2”
2-1/2”
12”
Notes: Change ‘N’ to ‘L’ for LP Gas Model.

No deration on LP models.

All water connections are 2-1/2”

Standard Features

Smart Touch™ Features

87% Thermal Efficiency (AHRI)
Modulating Burner with 5:1 Turndown
Outdoor Ready
CSD-1 Compliant
Direct-Spark Ignition
Low NOx Operation
Sealed Combustion
160 psi Working Pressure
On/Off Switch
Adjustable High Limit with Manual Reset
Condensate Trap w/Blocked Drain 		
Switch
Drain Valve
System Sensor
Outdoor Air Sensor
Inlet & Outlet Temperature Sensors
High-Voltage Terminal Strip
Low-Voltage Terminal Strip
50 psi ASME Relief Valve
Temperature & Pressure Gauge
Zero Clearances to Combustible Materials
Low & High Manual Reset Gas 		
Pressure Switches
10-Year Limited Warranty
(See Warranty for Details)
1-Year Warranty on Parts
(See Warranty for Details)

CON·X·US Remote Connect
Full-Color 8” Touchscreen LCD Display
Built-in Cascading Sequencer for up to
8 Boilers
> Built-in Redundancy
> Cascade Multiple Sized Boilers
> Lead/Lag Cascade
> Efficiency Optimized Cascade
Front-End Loading Capability with 		
Crest Boilers
Building Management System 		
Integration with 0-10 VDC Input
Outdoor Reset Control
Password Security
Domestic Hot Water Prioritization
> DHW tank piped with priority in the
		
boiler loop
> DHW tank piped as a zone in the
system with the pumps
controlled by the Smart System
> DHW Modulation Limiting
> Separately Adjustable SH/DHW
Switching Times
Low Water Flow Safety Control & 		
Indication
Inlet & Outlet Temperature Readout
Freeze Protection
Service Reminder
Time Clock
Data Logging
> Hours Running, SH
> Hours Running, DHW
> Hours Running, Modulation Rate
> Ignition Attempts
> Last 10 Lockouts

Ship
Wt.
(lbs)
1,470”
1,550”
1,696”
1,841”
2,152”

*w/CAT II conversion kit

Programmable System Efficiency
Optimizers
> Night Setback
> Anti-Cycling
> Outdoor Air Reset Curve
> Ramp Delay
> Boost Temperature & Time
> Modulation Factor Control
Three Pump Control
> System Pump

Vent
Outlet
9”
10”
10”
12”
14”

G
16”
16-1/4”
16-1/4”
16-1/4”
17-1/2”

> Boiler Pump
> Domestic Hot Water Pump
High-Voltage Terminal Strip
> 240V/60 Hertz/1 Phase Power
Supply (PB2500-PB3000)
> 208V/60 Hertz/3 Phase Power
		
Supply (PB3500PB4000)
> 480V/60 Hertz/3 Phase Power
		
Supply (PB5000)
> System Pump, Boiler Pump and
		
DHW Pump Power
Low-Voltage Terminal Strip
> 24 VAC Auxiliary Device Relay
> Auxiliary Proving Switch Contacts
> Alarm on Any Failure Contacts
> Runtime Contacts
> DHW Thermostat Contacts
> Unit Enable/Disable Contacts
> System Sensor Contacts
> DHW Tank Sensor Contacts
> Outdoor Air Sensor Contacts
> Cascade Contacts
> 0-10V DC BMS External Control
Contact
> 3 Way Valve Contacts

Optional Equipment
Alarm Bell
Outdoor Kit
Low Temperature Valve
Motorized Mixing Valve
BMS Gateway to LON or BACnet IP
BACnet MSTP Communications
Modbus Communications
Cupro-Nickel Heat Exchanger
Wireless Outdoor Sensor
Low Water Cutoff
w/ Manual Reset & Test
Electrical Options (shipped loose)
> 208V/3PH/60 Hz (PB5000)
> 480V/3PH/60 Hz (PB3500-4000)
> 600V/3PH/60 Hz (PB3500-4000)

2,500,000 - 5,000,000 Btu/hr models

			 AHRI		
Net AHRI										
Model
Input Thermal Output Rating										
Number MBH Efficiency MBH
MBH
A
B
C
D
E
F
PBN2500
2,500
87.0%
2,175
1,891
59”
44-1/2”
29-3/4”
49-3/4”
4”
15”
PBN3000
3,000
87.0%
2,610
2,270
65”
44-1/2”
29-3/4”
55-3/4”
4”
15”
PBN3500
3,500
87.0%
3,045
2,648
70-1/4”
47-1/4”
29-3/4”
62-1/2”
8-1/4”
15”
PBN4000
4,000
87.0%
3,480
3,026
79-3/4”
47-1/4”
29-3/4”
68-3/4”
8-1/4”
15”
PBN5000
5,000
87.0%
4,350
3,783
93-1/4”
46-3/4”
32-3/4”
82-1/4”
10”
17-3/4”

Registered under U.S. Patent # 7,506,617

10

500,000 to 2,000,000 Btu/hr models
The Original Boiler Continues to Set the Standard

In 1986, Power-Fin® redefined the industry with its space-saving
design, groundbreaking
efficiency and venting
flexibility. Now, over 30
years later, we continue
to raise the standard
with an easy-to-operate
touchscreen user interface,
remote boiler control and
enhanced communications.
The advanced SMART
Starting with the introduction of Power-Fin product
line in 1986, we were able to provide something
TOUCH™ color display
that other companies weren’t focused on, efficiency
includes CON·X·US
and footprint. Now, 30 years later, we are proud to
continue that tradition and provide some of the most remote connectivity via
efficient products on the market.
WiFi or Ethernet for easy
control at your fingertips,
from anywhere. And a simple drop-in Modbus or BACnet card
allows for easy integration into a Building Management System.

Enhanced Operating Control

The Power-Fin now offers the industry-best
SMART TOUCH™ 8˝ LCD full color touchscreen
with easy-to-understand infographics. It is equipped
with CON·X·US® connectivity that lets you remotely
monitor and optimize the performance of the entire
boiler plant.

Burner Modulation Boosts Efficiency and Lowers Costs

With thermal efficiency of 85%, Power-Fin boilers feature a 5:1 turndown ratio that will precisely match
the firing rates to heating load requirements—at any point from 20% to full firing rate. This results in less
equipment cycling for greater efficiency and cost savings.

Ready for Outdoor Installation

In warm-weather sites where the mechanical room is overcrowded, the Power-Fin can be easily installed
either outdoors or on a rooftop. Its optional hood and screen protector make outdoor installation fast and
trouble free.

Venting Solutions

The Power-Fin offers seven venting options for ease of installation and venting flexibility to meet the most
challenging installation requirements. The Power-Fin permits air intake and exhaust lengths up to 100 ft,
allowing terminations to be horizontal through a sidewall or vertical through a roof. Consult the installation
and operation manual for detailed venting guidelines.

11

Power-Fin ® Boiler Dimensions & Specifications
J

K

M

B

G

N
C

P

Power-Fin Boiler

L

Dimensions and Specifications

Notes: Change ‘N’ to ‘L’ for LP Gas Model.

Standard Features
85% Thermal Efficiency
Modulating Burner with 5:1 Turndown
> Hot Surface Ignition
> Low NOx Operation
> Sealed Combustion
> Low Gas Pressure Operation
Vertical & Horizontal Venting
> Venting up to 50 Feet
> Category I or Category IV Venting
> Cat IV converts to Cat II
w/ optional vent kit
ASME Copper-Finned Tube
Heat Exchanger
> ASME Certified, “H” Stamped
> Gasketless design
> 160 psi working pressure
On/Off Switch
Adjustable High Limit w/ Manual Reset
Flow Switch
Low Air Pressure Switch
Downstream Test Cocks
50 psi ASME Relief Valve
Combustion Air Filtration
Temperature & Pressure Gauge
Zero Clearances to Combustible Material
1 Year Warranty on Parts
10 Year Limited Warranty
(See Warranties for Details)

No deration on LP models.

Smart System Features

All water connections are 2-1/2”

SMART SYSTEM Operating Control
> 2 line, 16 Character Display
> Dual Level Password Security
> Domestic Hot Water Prioritization
> Built in Cascading Sequencer
for up to 8 Boilers
> Building Management System
Integration with 0-10 VDC Input
> Outdoor Reset Control
with Outdoor Air Sensor
> Low Water Flow Safety Control & Indication
> Inlet & Outlet Temperature Readout
> Freeze Protection
> Service Reminder
> Time Clock
Data Logging
> Hours Running, Space Heating
> Hours Running, Domestic Hot Water
> Ignition Attempts
> Last 10 Lockouts
Programmable System Efficiency
Optimizers
> Night Setback
> Anti-Cycling
> Outdoor Air Reset Curve
> Ramp Delay
> Boost Temperature & Time

*w/CAT II conversion kit

Three Pump Control
> System Pump
> Boiler Pump
> Domestic Hot Water Pump
High Voltage Terminal Strip
> 120 VAC / 60 Hertz /
1 Phase Power Supply
> Three sets of Pump Contacts
with Pump Relays
Low Voltage Terminal Strip
> 24 VAC Auxiliary Device Relay
> Auxiliary Proving Switch
Contacts
> Flow Switch Contacts
> Alarm on Any Failure Contacts
> Runtime Contacts
> DHW Thermostat Contacts
> Room Thermostat Contacts
> System Sensor Contacts
> DHW Tank Sensor Contacts
> Outdoor Air Sensor Contacts
> Cascade Contacts
> 0-10 VDC BMS External
Control Contact

Firing Control Systems
M Indicates 5:1 Turndown, Category IV
B Indicates 2:1 Turndown, Category I
F Indicates 100% On/Off Fire, Category I

Optional Equipment

500,000 - 2,000,000 Btu/hr models

			 B9/F9		
Net AHRI
M9		
Net AHRI						
Model
Input Thermal Output Rating
Thermal Output
Rating					
B9/F9
M9
Number MBH Efficiency MBH
MBH
Efficiency MBH
MBH
A
B
C
D
E
E
F
G
PBN0502
500
85.0%
425
370
85.0%
425
370
44-1/2”
28-1/2” 23-1/4” 34”
17-3/4” 19-1/2”
6-1/2” 6”
PBN0752
750
85.0%
638
554
85.0%
638
554
52”
28-1/2” 23-1/4” 41-1/2” 17-3/4” 19-1/2”
6-3/4” 6”
PBN1002
999
85.0%
850
739
85.0%
850
739
59-1/4”
28-1/2” 23-1/4” 48-3/4” 17-3/4” 19-1/2”
7-1/4” 6”
PBN1302
1,300
85.0%
1,105
961
85.0%
1,105
961
67-3/4”
28-1/2” 23-1/4” 57-1/4” 17-3/4” 19-1/2”
8-1/4” 6”
PBN1501
1,500
84.0%
1,260
1,096
85.0%
1,275
1,109
65-1/2”
29-3/4” 27-1/4” 58-3/4” 21”
21”
13-1/2” 8”
PBN1701
1,700
84.0%
1,428
1,242
85.0%
1,445
1,257
70”
29-3/4” 27-1/4” 63-1/4” 21”
21”
13-1/2” 8”
PBN2001
2,000
84.0%
1,680
1,461
85.0%
1,700
1,478
76-3/4”
29-3/4” 27-1/4” 70”
21”
21”
13-1/2” 8”
		
										 Vent Sizes
Ship
Model							
B9/F9
M9
Gas
Air
B9/F9
M9*
M9 Wt.
Number
H
J
K
L
M
N
P
P
Conn.
Inlet
Cat I
Cat II Cat IV (lbs)
PBN0502
8”
7-3/4”
23”
11-1/2”
11-1/4”
17-1/2”
15-1/4”
15-1/4”
1”
5”
7”
7”
4”
505
PBN0752
8”
7-3/4”
30-1/2”
11-1/2”
11-1/4”
17-1/2”
15-1/4”
15-1/4”
1-1/4”
5”
9”
9”
5”
554
PBN1002
8”
7-3/4”
37-3/4”
11-1/2”
11-1/4”
17-1/2”
15-1/4”
15-1/4”
1-1/4”
6”
10”
10”
6”
603
PBN1302
8”
7-3/4”
46-1/4”
11-1/2”
19-1/2”
17-1/2”
15-1/4”
15-1/4”
1-1/4”
6”
12”
12”
8”
652
PBN1501
10”
9-1/2”
43-1/2”
5-3/4”
22-1/4”
21-1/2”
24-1/2”
19-1/2”
1-1/2”
6”
12”
8”
6”
1,065
PBN1701
10”
9-1/2”
48”
5-3/4”
25”
21-1/2”
24-1/2”
19-1/2”
1-1/2”
7”
14”
9”
7”
1,100
PBN2001
10”
9-1/2”
54-3/4”
5-3/4”
27-1/2”
21-1/2”
24-1/2”
19-1/2”
1-1/2”
8”
14”
10”
8”
1,127

Alarm Bell
Wireless Outdoor Sensor
Cupro-Nickel Heat Exchanger
High & Low Gas Pressure Switches
w/ Manual Reset (Req. for CSD-1/FM/GE Gap)
Low Water Cutoff
w/ Manual Reset & Test (Req. for California Code)
Modbus Communication
BMS Gateway - BACnet or LonWorks
Vent Kits:
- Horizontal Exhaust Cap
- Horizontal Air Intake Cap
- Horizontal Direct Vent Kit
- Category IV to Category II
Conversion Kit
Smart System PC Kit

Registered under U.S. Patent # 7,506,617

12

®

The Foundation of Lochinvar Becomes Stronger
Copper-finned tube, non-condensing appliances are the
foundation of Lochinvar’s success. In 1993, Lochinvar
introduced the Copper-Fin II, the first horizontal chassis,
copper-finned tube boiler to operate with fan-assisted
combustion. Now, the Copper-fin II is even better.
Along with high thermal efficiency, gasketless heat
exchangers and multiple venting options we have added
Lochinvar’s exclusive SMART SYSTEM™ control.
Nine models from 399,999 to 2,070,000 Btu/hr input
provide you with exceptional products with a long
list of new features in addition to the established features which redefined the industry. The Copper-fin II was the first
proportional fired, fan-assisted boiler on the market. Every model features a small footprint for easy passage through a
36” door, low NOx – third party tested to less than 20 PPM, Stack Frames that can put twice the Btu/hr input in the same
space and vent diameters up to 8” smaller than conventional atmospheric boilers.

SMART SYSTEM Puts More Control and Information at Your Fingertips

The most exciting addition to the Copper-Fin II is the SMART SYSTEM control. The SMART SYSTEM is an advanced,
state of the art integrated operating control. We introduced the SMART SYSTEM control in 2005 and it has delivered proven
operation in thousands of demanding commercial applications. The control provides the installer, owners and operators with
precise temperature control and diagnostic information.
Advanced features include:
• 2-Line, 16 character LCD display of setup, system status and diagnostic data in words, not codes
• Built-in cascade sequencer controlling up to 8 boilers
• Outdoor reset adjusts setpoint based on reset curve
• Domestic hot water prioritization allows the boiler to provide space heating and produce domestic hot
water all in one system
• 0-10 VDC BMS input to control boiler operation
• Modbus protocol - optional

Proportional Firing

Proportional firing divides a single manifold of multiple burners into smaller, independent stages.
With up to four stages of individual operation, the Smart System control can reduce the firing rate down to approximately 25%
Btu/hr input. This simple but effective design matches the boiler’s firing capacity to the constantly changing system demand.
Full Fire or On/Off combustion systems often fire the entire gas train in short, inefficient bursts. Stage firing delivers the Btu’s
required in smoother and longer burn cycles which will improve operation and reduce component fatigue.

Gasketless Heat Exchanger

In 1989, Lochinvar was the first water heater manufacturer to offer gasketless cast iron & copper-finned tube heat
exchangers. Our unique gasketless design enhances reliability by eliminating O-rings and gaskets found on other brands.
The heat exchanger features glass lined headers and copper-finned tubes with extruded integral fins spaced 7-fins per inch
for exceptional heat transfer. The heat exchanger is built to ASME construction standards for 160 psi working pressure
and is backed by a ten year limited warranty.

Venting Options

Conventional

Vents into
conventional
flue or vent
breaching using
Type B double
wall vent.
Powered Sidewall

13

Vents directly
through the outside
wall using an
optional powered
sidewall cap. Ideal
when a vent stack
is not practical.

Sidewall

DirectAire Vertical w/ Sidewall Outdoor

Draws fresh air from
inside the room. Vents
up to 50 equivalent
feet directly through
the outside wall
without the need for a
powered sidewall cap.
DirectAire Vertical
Draws fresh air
from outside and
vents through
conventional
vertical flue.

Draws fresh
air from
outside and
vents through
conventional
vertical flue.
Power DirectAire Horizontal
Draws fresh air
from outside
and vents
through sidewall
using optional
powered vent
cap.

Requires optional
outdoor vent cap.
Use when indoor
space is a problem
or if outdoor
location gives
better access.
Aire-Lock Direct Vent
Draws fresh air
50 equivalent feet
from a sidewall.
Vents horizontally
up to 50 equivalent
feet through the
sidewall.

Copper-Fin II® Boiler Dimensions & Specifications
E

F

GAS CONNECTION
0992-2072

GAS CONNECTION
0402-0752

A

G

INLET AIR
FILTER

G

D

OUTLET

INLET

H
C

B

Copper-Fin II Heating Boiler				

Dimensions & Spec­i­fi­ca­tions
Air
Inlet
6”
6”
8”
8”
10”
12”
12”
12”
12”

Gas
Ship
Conn. Wt. (lbs)
1-1/4”
378
1-1/4”
414
1-1/4”
500
1-1/4”
543
2”
773
2”
863
2”
965
2”
1,100
2”
1,219

®

				
Net AHRI
Model Input Thermal Output Rating									
Vent
Number MBH Efficiency MBH MBH
A
B
C
D
E
F
G
H
Size
CHN0402
399
85%
339
295
31-1/2” 37-3/4”
22-1/4”
12-1/2”
7”
7”
29”
6-1/2”
6”
CHN0502
500
85%
425
370
31-1/2” 45-1/2”
22-1/4”
12-1/2”
7”
7”
29”
6-1/2”
6”
CHN0652
650
85%
553
481
31-1/2” 56-3/4”
22-1/4”
12-1/2”
8-1/2”
8-1/4”
29”
6-1/2”
8”
CHN0752
750
85%
638
555
31-1/2” 64”
22-1/4”
12-1/2”
8-1/2”
8-1/4”
29”
6-1/2”
8”
CHN0992
990
85%
842
732
36”
48-1/4”
33-1/2”
15-3/4”
8-1/2”
8-1/2”
33-3/4”
8-3/4” 10”
CHN1262 1,260
85%
1,071
931
36”
58-1/2”
33-1/2”
15-3/4”
10-1/2”
9-1/2”
33-3/4”
8-3/4” 12”
CHN1442 1,440
85%
1,224
1,064
36”
68-3/4”
33-1/2”
15-3/4”
10-1/2”
10-1/2”
33-3/4”
8-3/4” 12”
CHN1802 1,800
85%
1,530
1,330
36”
82-1/4”
33-1/2”
15-3/4”
11”
11”
33-3/4”
8-3/4” 14”
CHN2072 2,070
85%
1,760
1,530
36”
92-1/2”
33-1/2”
15-3/4”
11”
11”
33-3/4”
8-3/4” 14”

Notes: Change ‘N’ to ‘L’ for LP gas models. 		No deration on LP models			
Water connections for models CH 0402-0752 are 2” NPT on 6-1/2” centers.
Header increases “B” dimension 3-1/2” for models CH 0402-0752 and 6-1/4” for models CH 0992-2072. Water connections for models CH 0992-2072 are 2-1/2” NPT on 11-1/4” centers.

Standard Features

Smart System™ Features

Certifications

85% Thermal Efficiency
Proportional Firing up to 4:1 Turndown
Hot Surface Ignition
Low NOx Operation
Sealed Combustion
Low Gas Pressure Operation
Vertical & Horizontal Venting
Category I Venting
		 Double Wall “B” Vent Material
Category IV Venting
		 AL29-4C Stainless Steel Vent Material
ASME Copper Finned Tube Heat Exchanger
ASME Certified, “H” Stamped
Gasketless design
160 psi working pressure
On/Off Switch
Combustible Floor Rated (0992 - 2072)
Adjustable High Limit w/ Manual Reset
Flow Switch
Low Air Pressure Switch
Inlet & Outlet Temperature Sensors
Easy Access Terminal Strips
Downstream Test Cocks
50 psi ASME Pressure Relief Valve
Temperature & Pressure Gauge
1 Year Warranty on Parts (See Warranty for Details)
10 Year Limited Warranty (See Warranty for Details)
0-10 VDC Rate Contacts

SMART SYSTEM™ Operating Control
2 Line/16 Character LCD Display
Built in Cascading Sequencer for up to 8 boilers
Front End Loading with Crest or KNIGHT boilers
Building Management System Integration
with 0-10 VDC Input
Outdoor Reset Control with Outdoor Air Sensor
Password Security
Domestic Hot Water Prioritization
Low Water Flow Control & Indication
Inlet & Outlet Temperature Readout
Freeze Protection
Service Reminder
Time Clock
0-10 VDC Rate Output
Condensing Protection
0-10 VDC System Pump Speed Input
Data Logging
Hours Running, Space Heating
Hours Running, Domestic Hot Water
Ignition Attempts
Last 10 Lockouts
Programmable System Efficiency Optimizers
Night Setback
Anti-Cycling
Outdoor Air Reset Curve
Boost Temperature & Time

ANSI Z21.13/CSA 4.9 certified
South Coast Air Quality Management District registered
Texas Commission on Environmental Quality
Three Pump Control
System Pump
Boiler Pump
Domestic Hot Water Pump
High Voltage Terminal Strip
120 VAC / 60 Hertz / 1 Phase Power Supply
Pump Contacts with Pump Relay
Low Voltage Terminal Strip
24 VAC Auxiliary Device Relay Output - Louvers
Auxiliary Proving Switch Contacts - Louvers
3-way Valve Contacts for Low
Temperature Protection
Alarm on Any Failure Contacts
0-10 VDC System Pump Speed Contacts
Runtime Contacts
DHW Thermostat Contacts
DHW Tank Sensor Contacts
Unit Enable/Disable Contacts
System Sensor Contacts - Supply and Return
Outdoor Air Sensor Contacts
Contacts for Air Louvers
Contacts on Any Failure
Cascade Contacts
0-10 VDC BMS External Control Contact

Optional Equipment
Alarm Bell
High & Low Gas Pressure Switches w/ Manual Reset
Cupro-Nickel Heat Exchanger
Low Water Cut Off, Probe Type w/ Manual Reset & Test
Modbus Communications
BMS Gateway - BACnet or LonWorks
Combustible Floor Kit (0402-0752)
Stack Frame
Thermal Static Low Temperature Protection Valve
Outdoor Vent Cap

Firing Codes

Registered under U.S. Patent # 5,989,020

M7 Firing Code - California Code
M9 Firing Code - Hot Surface Ignition
with Electronic Supervision
M13 Firing Code - CSD1 / Factory Mutual / GE Gap

14

Copper-Fin®

Energy Efficient, Cost Effective Boilers
Lochinvar first introduced Copper-Fin technology to the
boiler industry some 50 years ago. Since then, we’ve
continued to refine and perfect it - adding advanced
fan-assisted combustion, hot surface ignition, a unique
gasketless cop­per finned tube heat ex­chang­er and highly
efficient insulating materials.

Installation Flexibility and Cost-Savings

With compact sizes that use less floor space than ever
before, all Copper-Fin units are narrow enough to fit
through a standard 36” doorway – an ad­van­tage most
commercial boilers can’t provide. Plus, thanks to special
insulating materials, Copper-Fin units require only 3”
clearance from combustible walls. What’s more, our
Stack Frame allows you to install two units in the area
normally required for one. This makes it easier to fit
multiple Copper-Fin boilers into cramped me­chan­i­cal rooms. And you can even use a smaller diameter vent stack - up to 8” smaller
than typically required for comparable atmospheric boilers - so it saves money as well as valuable mechanical room space.

Unique Copper-Fin Heat Ex­chang­er

The Lochinvar Copper-Fin boiler design uses a two pass heat ex­chang­er. Water is circulated through a row of
high­ly-efficient, finned copper tubes. The high rate of water flow creates a scour­ing action that prevents sed­i­
ment and lime-scale buildup, common in conventional boilers, and the finned copper tubes allow maximum
heat transfer efficiency. To create this special heat transfer capability, Lochinvar extrudes the fins from
thick wall copper tubing to precise specifications - ex­act­ly 7 fins per inch. The result is an integrallyfinned tube with a heat transfer ratio 9 times greater than a plain copper tube.

Heavy-Duty Gasketless Design

What’s more, advanced casting processes allowed Lochinvar to develop a unique one-piece
header system. This gasketless design provides enhanced reliability, improved durability and
optimum performance - without the problems or failures common with O-rings and gaskets.

Meets the Toughest Air Quality Standards

Because of our unique fan-assisted combustion process, the Copper-Fin exceeds today’s toughest NOx emissions requirements. An
independent certification laboratory test gave us a rating of less than 20 ppm - corrected to 3% O2. And less NOx means a cleaner
environment.

Enhanced to Provide Performance and Serviceability

Our enhanced Copper-Fin models offer the same reliable operation, and feature a more service friendly
design. The down stream test valves and referenced gas valves are now in the upper deck for easier
access, and the electrical and BMS connections have been repositioned to the front of the unit for easier
installation.
The gas valves, which are referenced to the sealed combustion chamber, improve operational performance
by monitoring the pressure in the sealed combustion chamber and adjusting gas flow to maintain the
optimum air/fuel mixture. And the built-in air inlet filter reduces maintenance and improves performance
by trapping dust and airborne particulates that can foul the burners and blowers.
With dual sight glasses (one on each end), you can easily monitor burner performance and flame
characteristics throughout the entire combustion chamber.
The operator interface panel provides two-stage electronic temperature control and comprehensive
diagnostic status without opening the control panel. Its user friendly design simplifies service while
providing additional diagnostic information through a series of LEDs.

15

Copper-Fin Heating Boiler				
Model
Number

CBN0497
CBN0647
CBN0747
CBN0987
CBN1257
CBN1437
CBN1797
CBN2067

Copper-Fin®

Copper-Fin® Boiler Dimensions & Specifications

Dimensions & Spec­i­fi­ca­tions

Input 		
Heating Net AHRI
Max Thermal Capacity Rating									 Gas
MBH Efficiency MBH
MBH
A
B
C
D
E
F
G		 Conn.

495
645
745
985
1255
1435
1795
2065

81%
81%
81%
81%
81%
81%
81%
81%

401
522
603
798
1,017
1,162
1,454
1,673

349
454
524
694
884
1,010
1,264
1,455

Notes: Change ‘N’ to ‘L’ for LP gas models. 			
No deration on LP models.				

31-1/2”
31-1/2”
31-1/2”
36”
36”
36”
36”
36”

45-1/4”
56-3/4”
64”
48-1/4”
58-1/2”
68-3/4”
82-1/4”
92-1/2”

22-1/4”
22-1/4”
22-1/4”
33-1/2”
33-1/2”
33-1/2”
33-1/2”
33-1/2”

12-1/2”
12-1/2”
12-1/2”
15-3/4”
15-3/4”
15-3/4”
15-3/4”
15-3/4”

9-1/2”
9-1/2”
9-1/2”
8-1/2”
9-1/2”
10-1/2”
11”
11”

22-3/4”
28-1/2”
32”
8-1/2”
10-1/2”
10-1/2”
11”
11”

29-1/2”
29-1/2”
29-1/2”
33-3/4”
33-3/4”
33-3/4”
33-3/4”
33-3/4”

Water connections for models CB 0497-747 are 2” NPT on 6-1/2” centers.		
Water connections for models CB 0987-2067 are 2-1/2” NPT on 11-1/4” centers.

1-1/4”
1-1/4”
1-1/4”
2”
2”
2”
2”
2”

Vent
Size

Ship
Wt.(lbs)

6”
8”
8”
10”
12”
12”
14”
14”

440
510
550
845
905
1050
1193
1350

Standard Features

Optional Equipment

Available Firing Systems

81% Thermal Efficiency
Electronic Temperature Control
Fan Assisted Combustion
Sealed Combustion Chamber
Stainless Steel Burners
Low NOx Operation Exceeds the most
Stringent Air Quality Requirements
ASME Copper Finned Tube
Heat Exchanger
160 psi Working Pressure
Gasketless Heat Exchanger Design
Pump Relay w/ Delay
Down Stream Test Valve
Referenced Gas Valves
Loch-Heat Ceramic Tile
Combustion Chamber
Hot Surface Ignition
Adjustable High Limit w/ Manual Reset
ASME Pressure Relief Valve
Temperature & Pressure Gauge
Flow Switch
24 Volt Control System
BMS Terminal Strip
Combustion Air Filter
Freeze Protection
10 Year Limited Warranty on Heat Exchanger
(See warranty for details)

Alarm Bell
Contacts on any Failure & Runtime
Contacts for Air Louvers
Cupro-Nickel Heat Exchanger
High & Low Gas Pressure Switch
w/ Manual Reset
Outdoor Reset Control
Manual Reset Low Water Cut-Off
­­w/ test
Stack Frame
MP2 Sequencer
Outdoor Vent Cap

M9
			
M13
M7

Hot Surface Ignition with
Electronic Supervision (Standard)
GE GAP/FM/CSD1
California Code

Registered under U.S. Patent # 5,989,020

16

Copper-Fin®
82

%

Lightweight, Flexible and
Energy Efficient
Copper-Fin® gas-fired atmospheric boilers are
high-efficiency boilers that save space, save
money, are lightweight, and are simple to service
and install. Copper-Fin boilers are equipped with
a built-in draft hood, a highly efficient copper
finned tube heat exchanger, our own specially
designed two-stage electronic control system, and
they are approved for installation on combustible
floors. Models are available with inputs from
315,000 to 500,000 Btu/hr.

Two-Stage Control System
The boiler’s two-stage electronic temperature control provides flexibility and saves fuel by
closely matching heat output to system demand. On colder days the boiler fires at full output, and
in warmer conditions the boiler reduces heat output to save energy and reduce boiler cycling.
During the majority of the heating season, less than full boiler output is required to satisfy the
heat load. For this reason, Lochinvar has developed a two-stage firing system. Two-stage firing standard equipment on all Copper-Fin boilers, provides dramatic fuel savings by reducing the firing rate 50%. And the
two-stage firing control is ideal for applications utilizing indoor/outdoor reset.* *I/O reset is available as an option.

Copper Finned Tube Heat Transfer
The heart of the Copper-Fin boiler is its copper finned-tube heat exchanger.
With this unique gasketless design, we’ve combined the best of both worlds:
cast iron headers for long-lasting durability, and a copper finned-tube heat
exchanger for high efficiencies and fast heat transfer. The gasketless
heat exchanger design reduces the risk of leaks or system failures that
are common with conventional boilers. Plus, the unit’s low-mass design
means that water gets heated quickly. Not only is heat up time nearly
instantaneous with these boilers, the energy consumption and operating
costs are lower too.

Intermittent Ignition Device
The Intermittent Ignition Device is a solid-state electronic spark-to-pilot ignition system that reduces fuel
consumption. Its electronic circuitry continuously monitors the system and provides pilot gas only when there
is a call for heat, eliminating the need for a continuously burning pilot, and providing an additional measure of
operational safety.

Built-In Draft Hood
The lower overall height of the draft hood makes it easier to install the Copper-Fin boiler in all applications,
especially in those instances where overhead space is limited and headroom restrictions exist.

Serviceability
This boiler is as flexible and convenient to install and service as it is efficient and compact. The heavy-duty stainless
steel burners can easily be adapted for use with either natural or liquefied petroleum (LP) gas, and the boiler’s design
allows for easy access to all major components for servicing. The heat exchanger is designed to slide out the front of
the boiler for faster maintenance, and Lochinvar backs it up with an exclusive 10-year Limited Warranty. For more
information, call your Lochinvar dealer today.
17

Copper-Fin Boiler		

Copper-Fin®

Copper-Fin® Boiler Dimensions & Specifications

Dimensions & Spec­i­fi­ca­tions

		
		
Net AHRI
Model Input Thermal
Output Rating					
Number MBH Efficiency
MBH
MBH
A
B
C
D

CBN315
CBN360
CBN399
CBN500

315
360
399
500

82.0%
82.0%
82.0%
82.0%

258
295
328
410

224
257
285
357

Notes: Change ‘N’ to ‘L’ to denote L.P. gas models
No deration for L.P. models.
Water Connections are 2” NPT on 6-1/4” centers.
Performance data is based on manufacturer test results.

29-1/2”
29-1/2”
29-1/2”
34-1/2”

32-1/4”
35-1/4”
44-1/2”
52-1/2”

21-1/2”
21-1/2”
22”
22”

16-1/4”
17-3/4”
22-1/4”
26-1/4”

Gas
Conn.

Vent
Size

Ship.
Wt.(lbs)

3/4”
1”
1”
1”

8”
9”
10”
10”

245
255
320
345

Standard Features

Optional Equipment

Firing Controls

82% Thermal Efficiency
ASME Copper Finned Tube Heat Exchanger
Gasketless Heat Exchanger Design
Two Stage Intermittent Electronic Ignition
160 PSI Working Pressure
Pump Relay
Two Stage Solid State Temperature Control
Two Stage Gas Valve with Built-In
Manual Shut-Off
Automatic Reset High Limit
ASME Pressure Relief Valve
Temperature & Pressure Gauge
Diagnostic Flash Codes
Built-In Draft Diverter
CSA Design Certified for Alcove Installation
CSA Design Certified for Installation
on Combustible Floor
Stainless Steel Burners
Loch-Heat Ceramic Tile Combustion Chamber
24 Volt Control System
10 Year Limited Warranty on Heat Exchanger
(See warranty for details)

Adjustable High Limit
w/ Manual Reset
Contacts on any Failure
Contacts for Air Louvers
Flow Switch
Outdoor Air Reset Control
Low Water Cut-Off
Stack Frame
Pump Delay/Freeze Protection
MP2 Sequencer
3-Way Low Temperature Valve

M9 - Two-Stage Intermittent
Spark Ignition (Standard)
M13 - GE GAP/FM/IRI
M7 - California Code

18

The Best You Can Buy
KNIGHT® is recognized for its reliable, proven performance and high quality standards. Its
award winning design assures contractors and home owners peace of mind and long term
savings in operating costs.
Lochinvar has raised the KNIGHT standard to even greater heights. The SMART
SYSTEM™ control with color display gives installers and maintenance personnel a greater
level of control than ever before. It’s easy to access all the information they need to setup,
troubleshoot and monitor all boiler functions. Additionally, two cascading options allow
the installer to fine-tune sequencing of multiple boiler installations.
More than ever, KNIGHT is the best choice for traditional hydronic space heating, radiant
floor heating and indirect domestic hot water applications.

Control
The SMART SYSTEM™ is the most advanced
integrated boiler control on the market today.
Now the CON·X·US® mobile communication
platform allows SMART SYSTEM to go where no
other boiler has gone before.†

†

CON·X·US control board
sold separately

CON·X·US provides the ability to monitor and manage multiple KNIGHT heating
boilers without ever stepping into the mechanical rooms. CON·X·US will send
alerts via text or e-mail notifying of changes in system status, and anytime, from
anywhere, a user can check system status and re-program any boiler function. Once
downloaded, the free CON·X·US mobile application allows for remote access to all
SMART SYSTEM functions using an internet-capable device.

Built-in Cascading Sequencer

When multiple KNIGHT boilers are installed together, the SMART SYSTEM
built-in sequencer can be set for “Lead-Lag” cascade or “Efficiency Optimized”
cascade operation.

Advanced Negative Regulation
Technology

KNIGHT safely and reliably operates with supply gas pressures as low as 4 inches
water column. Plus “Neg/Reg” technology automatically adjusts gas pressure to
ensure the correct volume of fuel and air entering the burner.

Direct-Spark Ignition

With each call for heat, two electrodes ignite the fuel/air mixture. A third electrode
then senses for flame. The SMART SYSTEM will generate a soft lockout and
display a fault if ignition does not occur.

Fully Modulating Burner with 5:1 Turndown

The SMART SYSTEM allows fully modulating combustion with 5:1 turndown. The
burner can fire as low as 20% of maximum input and modulates the firing rate up to
100% as demand increases. A woven stainless steel mesh enclosed burner tube fires in
a 360° pattern along the entire length of the primary heat exchanger.

Two-in-One Stainless Heat Exchanger

A primary heat exchanger combined with a secondary heat exchanger captures
flue gas heat and condenses to utilize available latent energy. The stainless steel,
pH-tolerant design features a weld-sealed assembly with no O-rings or gaskets and
does not require special glycol. ASME Section IV approved and stamped.

19

KNIGHT® Boiler Dimensions & Specifications

Models:
KBN 081-211

Model:
KBN286

Dimensions and Specifications

Knight Heating Boiler
Input			
Heating NET AHRI
Model Min. Max.		 Capacity Rating
Number MBH MBH AFUE MBH
MBH

KBN081
KBN106
KBN151
KBN211
KBN286

16
21
30
42
57

80
105
150
210
285

95.0%
95.0%
95.0%
95.0%
95.0%

74
97
139
196
267

64
84
121
170
232

																
A
C
D
E
F
G
H
I
J
K
Gas Water Air Vent		 Ship
											
Conn. Conn. Inlet Size		
Wt. (lbs)

33-1/4"
33-1/4"
33-1/4"
33-1/4"
42-1/4"

14"
7"
5-3/4"
14"
6-1/2" 5-3/4"
18"
12-1/4" 11-1/2"
22-1/4" 16-1/2" 15-3/4"
19-3/4" 12-3/4" 13-1/2"

5"
4-1/2"
10"
14-1/4"
6"

3"
1-1/2"
1-1/2"
5-1/4"
2"

20-1/2"
20-1/2"
21-1/4"
21-1/4"
34"

22"
22"
23"
23"
31"

1-3/4"
1-3/4"
1-3/4"
1-3/4"
11-3/4"

6-1/2" 1/2"
6-1/2" 1/2"
12" 1/2"
16-1/4" 1/2"
4-1/4" 3/4"

1"
1"
1"
1"
1-1/4"

3"
3"
3"
3"
4"

3"		 125
3"		 129
3"		157
3"		 172
4"		 224

Notes: Indoor installation only. All information subject to change. Change "N" to "L" for LP gas models.
Net ratings based on piping and pick-up allowance of 1.15

Smart System™ Features
SMART SYSTEM Digital Operating Control
> Multi-Color Graphic LCD Display
with Navigation Dial and Soft Keys
Three Setpoint Temperature Inputs
Built-in Cascading Sequencer for up to 8 Boilers
> Cascade Multiple Sized Boilers
> Lead Lag
> Efficiency Optimization
> Front End Loading Capability with Copper Fin II
Outdoor Reset Control with Outdoor Air Sensor
> Programmable for Three Reset Temperature Inputs
Programmable System Efficiency Optimizers
> Night Setback w/Override Function
> DHW Night Setback w/Override Function
> Anti-Cycling
> Outdoor Air Reset Curve
> Ramp Delay
> Boost Temperature & Time
Three Pump Control
> System Pump with Parameter for
Continuous Operation
> Boiler Pump with Variable Speed Pump Control
> Domestic Hot Water Pump
Domestic Hot Water Prioritization
> DHW tank piped with priority in the boiler loop
> DHW tank piped as a zone in the system with
the pumps controlled by the Smart System
> DHW Modulation Limiting
> Separately Adjustable SH/DHW Switching Times*
Building Management System Integration
> 0-10 VDC Input to Control Modulation or Set Point
> 0-10 VDC Modulation Rate Output
> 0-10 VDC Input Signal from Variable
Speed System Pump*
> 0-10 VDC Input to Enable/Disable call for heat

Standard Features
High-Voltage Terminal Strip
> 120 VAC / 60 Hertz / 1 Phase Power Supply
> Three Sets of Pump Contacts
Low Voltage Terminal Strip
> 24 VAC Device Relay
> Proving Switch Contacts
> Flow Switch Contacts
> Alarm on Any Failure Contacts
> Runtime Contacts
> DHW Thermostat Contacts
> 3 Space Heat Thermostat Contacts
> System Sensor Contacts
> DHW Tank Sensor Contacts
> Outdoor Air Sensor Contacts
> Cascade Contacts
> 0-10 VDC BMS External Control Contact
> 0-10 VDC Boiler Rate Output Contacts
> 0-10 VDC Variable Speed System Pump Signal Input
> 0-10 VDC Signal to Control Variable
Speed Boiler Pump
> Modbus Contacts
Time Clock
Data Logging
> Hours Running, Space Heating
> Hours Running, Domestic Hot Water
> Ignition Attempts
> Last 10 Lockouts
Access to BMS Settings through Graphic LCD Display
Maintenance Reminder
> Custom Maintenance Reminder with Contractor Info
> Installer Ability to De-activate Service Reminder
Low-Water Flow Safety Control & Indication
Dual Level Password Security
Customizable Freeze Protection Parameters

Energy Star™ Qualified
95% DOE AFUE Efficiency
Modulating Burner with 5:1 Turndown
> Direct-Spark Ignition
> Low-NOx Operation
> Field Convertible from Natural to LP Gas
ASME Stainless Steel Heat Exchanger
> 30 psi ASME Relief Valve
Vertical & Horizontal Direct-Vent
> PVC, CPVC, Polypropylene or SS Venting up to 100 feet
Smart System Control
Condensate Trap
Other Features
Automatic Reset High Limit
Adjustable High Limit w/Manual Reset
Boiler Circulating Pump
Adjustable Leveling Legs
Zero Clearances to Combustible Materials
5-Year Parts Warranty
12-Year Limited Warranty (See Warranty for Details)

Optional Equipment

CON·X·US Remote Connect
Modbus Communication
Condensate Neutralization Kit
Multi Temperature Loop Control
Flow Switch
Low-Water Cutoff w/Manual Reset & Test
Alarm Bell
Concentric Vent Kit
Stack Frame
BMS Gateway - BACNet or LonWorks
Sidewall Vent Termination
Wireless Outdoor Sensor

Firing Codes
M9		Standard Construction
M7		California Code
					 *Exclusive feature available only from Lochinvar

20

Money-Saving 95% Efficiency and Easier than Ever to Install
The KNIGHT floor standing fire tube boiler features reduced installation footprint for
flexibility in boiler placement. Plus, all connections are on the top and left side, so KNIGHT
is an easy drop in replacement for older, less efficient boilers. Six models offer inputs from
55,000 to 285,000 Btu/hr.

Use Existing Piping to Reduce Costs

The KNIGHT fire tube boiler operates with low pressure drop. The design incorporates
a small volume of water in the heat exchanger. This allows the boiler to be installed in a
primary/secondary or a full-flow piped system. There is no need to change the piping to
accommodate the boiler. The boiler adapts to the system. This flexibility allows for a
faster, more cost-effective boiler upgrade.

10:1 Turndown Ratio Optimizes Performance

Modulation turndown up to 10:1 means the firing rate automatically changes as the heat
load varies. A KHN110 KNIGHT boiler fires at its maximum 110,000 Btu/hr rate when
load is highest, then “turns down” to as low as 10% (11,000 Btu/hr) as load decreases.
A modulating boiler runs smoothly and efficiently, without frequent on/off cycling

Safe, Reliable NEG/REG Technology

KNIGHT boilers can operate with low gas supply pressure. Negative Regulation uses a
pre-mix gas system instead of relying on utility pressure through the gas valve. The result
is steady operation in low gas pressure systems or when gas demand is highest. Automatic
fan control fine-tunes the air/fuel ratio, providing superior combustion throughout the
operating range.

Superior Direct Venting Flexibility

KNIGHT boilers can be installed with direct-vent air intake and exhaust
runs up to 100 equivalent feet, using PVC, CPVC, polypropylene or
AL29-4C stainless steel vent pipe.

BOILER CONTROL, FROM ANYWHERE.
From wherever you are, the CON·X·US® option lets you use any internet-capable device to
link up with the SMART SYSTEM™ on an unlimited number of KNIGHT boilers.

> Do regular CON·X·US
checks for all your KNIGHT
customers, and let them
know you’re monitoring
their boiler’s performance.

> Adjust setpoints, domestic
hot water, reset curves,
pump delays and more,
using the CON·X·US
interactive display.

With CON·X·US, you’re always in touch and in control.
Optional CON·X·US control board is sold separately.

21

> Status alerts via
text or e-mail let
you know when
a KNIGHT boiler
needs attention.

KNIGHT® Boiler Dimensions & Specifications
AIR INLET

A

WATER OUTLET
GAS CONNECTION

FLUE

2-3/4"

43-3/8"
2-7/8"

HIGH-VOLTAGE
ELECTRICAL
CONNECTIONS

B

D

LOW-VOLTAGE
ELECTRICAL
CONNECTIONS

19"

F
G

H

WATER INLET

C

16"

CONDENSATE
DRAIN

I
1/4" - 1-1/4"
ADJUSTABLE

J
E

Dimensions and Specifications

Knight Heating Boiler
Input MBH

Model
Number

Min

Max

AFUE

Heating
Capacity
MBH

KHN055

8.2

55

95%

51

44

6"

8-3/8"

11-1/8"

10-1/2"

13-1/4"

37-1/2"

32-5/8"

32-1/4"

13-1/4"

3-3/8"

1/2"

KHN085

8.5

85

95%

79

69

6"

8-3/8"

11-1/8"

10-1/2"

13-1/4"

37-1/2"

32-5/8"

32-1/4"

13-1/4"

3-3/8"

1/2"

KHN110

11

110

95%

102

89

7-3/8"

9-3/4"

11-1/8"

10-5/8"

14-5/8"

37-3/4"

33"

32-1/2"

14"

4-5/8"

KHN155

15.5

155

95%

144

125

7-3/8"

9-3/4"

11-1/8"

10-5/8"

14-5/8"

37-3/4"

33"

32-1/2"

14"

KHN199

19.9

199.9

95%

185

161

7-1/2"

10-1/2"

11-1/8"

11-5/8"

15-3/8"

38"

33"

32-3/4"

KHN285

28.5

285

95%

264

229

7-1/2"

10-1/2"

11-1/8"

11-5/8"

15-3/8"

38"

33"

32-3/4"

Net
MBH

A

B

C

D

E

F

G

H

I

J

Gas
Water
Connect. Connect.

Air
Inlet

Vent
Size

Ship. Wt.
(lbs)

1"

2"

2"

160

1"

2"

2"

165

1/2"

1"

3"

3"

170

4-5/8"

1/2"

1"

3"

3"

175

14"

4-5/8"

1/2"

1-1/4"

3"

3"

195

14"

4-5/8"

1/2"

1-1/4"

3"

3"

205

Notes: Indoor installation only. All information subject to change. Change "N" to "L" for LP gas models.
Net ratings based on piping and pick-up allowance of 1.15

Smart System™ Features
> Smart System Digital Operating Control
Multi-Color Graphic LCD Display w/Navigation Dial,
Soft Keys and Loch-N-Link™ USB programming
> Three Boiler Setpoint Temperature Inputs
Plus Domestic Hot Water Prioritization
> Built-in Cascading Sequencer for up to 8 Boilers,
with Cascade Redundancy
Multiple Size Boiler Cascade
Lead Lag
Efficiency Optimization
Front End Loading Capability
> Outdoor Reset Control with Outdoor Air Sensor
Programmable for Three Reset Temperature Inputs
> Programmable System Efficiency Optimizers
SH Night Setback
DHW Night Setback
Anti-Cycling
Outdoor Air Reset Curve
Ramp Delay
Modulation Factor Control
Boost Temperature & Time
> Four Pump Control
System Pump with Parameter for Continuous Operation
Boiler Pump with Variable Speed Control
Domestic Hot Water Pump
Domestic Hot Water Recirculation
> Domestic Hot Water Prioritization
DHW tank piped with priority in the boiler loop
DHW tank piped as a zone in the system with the pumps
controlled by the SMART SYSTEM
DHW Modulation Limiting
Separately Adjustable Space Heat/DHW Switching Times
> Building Management System Integration
0-10 VDC Input to Control Modulation or Setpoint
0-10 VDC Modulation Rate Output
0-10 VDC Input to Enable/Disable Call for Heat

> Access to BMS Settings through Graphic LCD Display
> High-Voltage Terminal Strip
120 VAC / 60 Hertz / 1 Phase Power Supply
Three Sets of Pump Contacts
> Low-Voltage Terminal Strip
DHW Recirculation Pump Start/Stop
24 VAC Device Relay
Proving Switch Contacts
Flow Switch Contacts
Alarm on Any Failure Contacts
Runtime Contacts
DHW Thermostat Contacts
3 Space Heat Thermostat Contacts
System Sensor Contacts
DHW Tank Sensor Contacts
Outdoor Air Sensor Contacts
Cascade Contacts
0-10 VDC BMS External Control Contact
0-10 VDC Boiler Rate Output Contacts
0-10 VDC Variable Speed System Pump Signal Input
0-10 VDC Signal to Control Variable Speed Boiler Pump
Modbus Contacts
> Time Clock
> Data Logging
Hours Running, Space Heating
Hours Running, Domestic Hot Water
Ignition Attempts
Last 10 Lockouts
> Maintenance Reminder
Custom Maintenance Reminder with
Contractor Contact Information
Installer Ability to De-activate Service Reminder
> Low-Water Flow Safety Control & Indication
> Password Security
> Customizable Freeze Protection Parameters

Standard Features
> ENERGY STAR Most Efficient Product
> 95% DOE AFUE Efficiency
> Modulating Burner with up to 10:1 Turndown
Direct Spark Ignition
Low NOx Operation
> ASME Stainless Steel Heat Exchanger
30 PSI ASME Relief Valve
> Vertical & Horizontal Direct Vent
PVC, CPVC, Polypropylene or SS Venting up to 100 feet
> Smart System Control
> Condensate Trap
> Other Features
Automatic Reset High Limit
Adjustable High Limit w/Manual Reset
Boiler Circulating Pump
Zero Clearances to Combustible Materials
12-Year Limited Warranty (See Warranty for Details)
5-Year Limited Parts Warranty		

Optional Equipment
CON·X·US® Remote Connect
Modbus Communication
BACnet MSTP
Flow Switch
Low-Water Cutoff w/Manual Reset & Test
Alarm Bell
Concentric Vent Kit
Condensate Neutralization Kit
BMS Gateway to LON or BACnet IP
Multi-Temperature Loop Control
Sidewall Vent Termination
Wireless Outdoor Sensor
LP Gas Conversion Kit
> Firing Codes
M9 Standard Construction
M7 California Code

22

Money-Saving 95% Efficiency and Easier
Than Ever to Install
The KNIGHT® fire tube wall mount boiler allows for a more flexible installation
with top and bottom water connections**. Multiple water connection locations
add flexibility by allowing boiler connections as close as possible to the system
piping, reducing installation cost, complexity and the amount of piping needed
for a job.
The KNIGHT fire tube boiler operates with low pressure drop. The design incorporates a small volume of water in the heat exchanger allowing the boiler to be
installed in a primary/secondary or a full-flow piped system. There is no need to
change the piping to accommodate the boiler. The boiler adapts to the system.
This flexibility allows for a faster, more cost-effective boiler upgrade.
**Not included on WHN400

The CON·X·US® mobile communication platform allows SMART SYSTEM to go
where no other boiler has gone before.†
CON·X·US provides the ability to monitor and manage multiple KNIGHT heating boilers
without ever stepping into the mechanical rooms. CON·X·US will send alerts via text or
e-mail notifying of changes in system status, and anytime, from anywhere, a user can check
system status and re-program any boiler function. Once downloaded, the free CON·X·US
mobile application allows for remote access to all SMART SYSTEM functions using an
internet-capable device.

Updated SMART SYSTEM Control
Newest version of the SMART SYSTEM allows for easier setup and navigation
of parameters. New features include DHW recirculation pump control, LOCK-NLINK® USB programming, larger user interface, cascade leader redundancy and
modulation factor for fine tuning aggressiveness.

10:1 Turndown Ratio Optimizes Performance
Modulation turndown up to 10:1 means the firing rate automatically changes as the
heat load varies. A WHN111 KNIGHT boiler fires at its maximum 110,000 Btu/hr
rate when load is highest, then “turns down” to as low as 10% (11,000 Btu/hr) as
load decreases. A modulating boiler runs smoothly and efficiently, without frequent
on/off cycling. **Not included on WHN400

Safe, Reliable NEG/REG Technology
KNIGHT boilers can operate with low gas supply pressure. Negative Regulation
uses a pre-mix gas system instead of relying or utility pressure through the gas
valve. The result is steady operation in low gas pressure systems or when gas
demand is highest. Automatic fan control fine-tunes the air/fuel ratio, providing
superior combustion throughout the operating range.

Superior Direct-Venting Flexibility
KNIGHT boilers can be installed with direct-vent air intake and exhaust runs up to 100 equivalent feet, using PVC, CPVC,
polypropylene or AL29-4C stainless steel vent pipe.

23

C

KNIGHT® Boiler Dimensions & Specifications

C

C

M
N

LOW VOLTAGE
ELECTRICAL

FLUE

L

L

FLUE
INLET

L

A

INLET

F

K

OUTLET

G

E

OUTLET
COIN VENT

G

F

D

E

A

COIN VENT

K

E

A

O

F

H

H

I
I

OUTLET

AIR VENT

K
G

J

J

AIR VENT
B

CONDENSATE
DRAIN

CONDENSATE
DRAIN

D

D

O

COIN VENT

CONDENSATE
DRAIN

INLET

M

FLUE
N

O

HIGH VOLTAGE
ELECTRICAL
CONNECTIONS

HIGH VOLTAGE
ELECTRICAL
CONNECTIONS

LOW VOLTAGE
CONNECTIONS
ELECTRICAL
CONNECTIONS

M
N

HIGH VOLTAGE
ELECTRICAL
CONNECTIONS

LOW VOLTAGE
ELECTRICAL
CONNECTIONS

H
J

B

I

AIR VENT

Knight Heating Boiler

B

Dimensions and Specifications

Input			
Heating NET AHRI 																
A
B
C
D
E
F
G
H
I
J
K
L M N O Gas Water Air Vent Ship
Model Max. Min.		 Capacity Rating
																
Conn. Conn. Inlet Size Wt. (lbs)
Number MBH MBH AFUE MBH
MBH
333-1/4”18-1/2” 16”
11-3/4” 9”
3-1/2” 3-3/4” 1-1/2” 3”
6-1/8” 7-1/4” 3-3/4” 6-1/2” 4-1/2” 8-1/2”
WHN056
55
8.3
95%
51
44
33-1/4” 18-1/2” 16”
11-3/4” 9”
3-1/2” 3-3/4” 1-1/2” 3”
6-1/8” 7-1/4” 3-3/4” 8-1/2” 4-1/2” 8-1/2”
WHN086
85
8.5
95%
79
69
33-1/4” 18-1/2” 19”
14-1/2” 8-3/2” 5”
7-3/4” 1-1/8” 12-3/8” 4-1/4” 11-1/4” 3”
5-1/4” 5-1/8”
10”
WHN111
110
11
95%
102
89
2000544065
33-1/4” 18-1/2” 19”
14-1/2” 8-1/2” 5”
7-3/4” 1-1/8” 12-3/8” 4-/14” 11-1/4” 3”
5-1/4” 5-1/8” 10”
WHN156
155
15.5
95%
144
125
33-1/4” 18-1/2” 19”
14-1/2” 11”
6-1/4” 7-3/4” 1-1/2” 12-3/8” 4-1/4” 9-1/2” 3”
5-1/4” 5-1/2” 10-3/4”
WHN200
199.9 19.9
95%
185
161
33-1/4” 18-1/2” 21-3/4” 16-1/2” 11-1/8” 6-1/4” 7-3/4” 1-1/2” 12-3/8” 16-3/8” 12-1/4” 3-1/8” 5-1/4” 4”
15-1/8”
WHN286
285
28.5
95%
264
229
35-1/2” 25”
21-3/4” 17-1/2” 12-1/2” 9-1/4” 9-1/2” 2-1/4” 13-1/4” 21-1/2” 9”
4-3/4” 4” 22-1/2” 3-3/4”
WHN400
399
80
94.4%*
377#
328
*Thermal Efficiency%
# Gross Output MBH
**10:1 Turndown ratio and top and bottom water connections are not included on WHN400. WHN400 operates with a 5:1 turndown.

1/2” 1”
1/2” 1”
1/2” 1”
1/2” 1”
1/2”
1-1/4”
2000544065
1/2” 1-1/4”
3/4” 1-1/2”

2”
2”
3”
3”
3”
3”
4”

2”
2”
3”
3”
3”
3”
4”

139
142
159
166
175
184
213

2000544065

Information subject to change without notice. Change “N” to “L” for LP gas models. The Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15. Lochinvar should be consulted
before selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc. The ratings have been determined
under the provisions governing forced draft burners.

Smart System™ Features
> Smart System Digital Operating Control
Multi-Color Graphic LCD Display w/Navigation Dial,
Soft Keys and Loch-N-Link USB programming
> Three Boiler Setpoint Temperature Inputs
Plus Domestic Hot Water Prioritization
> Built-in Cascading Sequencer for up to 8 Boilers,
with Cascade Redundancy
Multiple Size Boiler Cascade
Lead Lag
Efficiency Optimization
Front End Loading Capability
> Outdoor Reset Control with Outdoor Air Sensor
Programmable for Three Reset Temperature Inputs
> Programmable System Efficiency Optimizers
SH Night Setback
DHW Night Setback
Anti-Cycling
Outdoor Air Reset Curve
Ramp Delay
Modulation Factor Control
Boost Temperature & Time
> Four Pump Control
System Pump with Parameter for Continuous Operation
Boiler Pump with Variable Speed Control
Domestic Hot Water Pump
Domestic Hot Water Recirculation
> Domestic Hot Water Prioritization
DHW tank piped with priority in the boiler loop
DHW tank piped as a zone in the system with the pumps
controlled by the SMART SYSTEM
DHW Modulation Limiting
Separately Adjustable Space Heat/DHW Switching Times
> Building Management System Integration
0-10 VDC Input to Control Modulation or Setpoint
0-10 VDC Modulation Rate Output
0-10 VDC Input to Enable/Disable Call for Heat
> Access to BMS Settings through Graphic LCD Display

> High-Voltage Terminal Strip
120 VAC / 60 Hertz / 1 Phase Power Supply
Three Sets of Pump Contacts
> Low-Voltage Terminal Strip
DHW Recirculation Pump Start/Stop
24 VAC Device Relay
Proving Switch Contacts
Flow Switch Contacts
Alarm on Any Failure Contacts
Runtime Contacts
DHW Thermostat Contacts
3 Space Heat Thermostat Contacts
System Sensor Contacts
DHW Tank Sensor Contacts
Outdoor Air Sensor Contacts
Cascade Contacts
0-10 VDC BMS External Control Contact
0-10 VDC Boiler Rate Output Contacts
0-10 VDC Variable Speed System Pump Signal Input
0-10 VDC Signal to Control Variable Speed Boiler
Pump
Modbus Contacts
> Time Clock
> Data Logging
Hours Running, Space Heating
Hours Running, Domestic Hot Water
Ignition Attempts
Last 10 Lockouts
> Maintenance Reminder
Custom Maintenance Reminder with
Contractor Contact Information
Installer Ability to De-activate Service Reminder
> Low-Water Flow Safety Control & Indication
> Password Security
> Customizable Freeze Protection Parameters

Standard Features
> 95% DOE AFUE Efficiency (56-286)
> Modulating Burner with up to 10:1 Turndown**
Direct Spark Ignition
Low NOx Operation
> ASME Stainless Steel Heat Exchanger
30 PSI ASME Relief Valve
> Top and bottom water connections (MNPT)**
> Vertical & Horizontal Direct Vent
PVC, CPVC, Polypropylene or SS Venting up to 100
feet
> SMART SYSTEM Control
> Condensate Trap
> Other Features
Automatic Reset High Limit
Adjustable High Limit w/Manual Reset
Boiler Circulating Pump
Zero Clearances to Combustible Materials
15-Year Limited Warranty (See Warranty for Details)
5-Year Limited Parts Warranty

Optional Equipment
CON·X·US Remote Connectivity
Modbus Communication
BACnet MSTP
Flow Switch
Low-Water Cutoff w/Manual Reset & Test
Alarm Bell
Concentric Vent Kit
Condensate Neutralization Kit
BMS Gateway to LON or BACnet IP
Multi-Temperature Loop Control
Sidewall Vent Termination
Wireless Outdoor Sensor
LP Gas Conversion Kit
> Firing Codes
M9 Standard Construction
M7 California Code

24

FIRE TUBE COMBI

™

A Game-Changer In Combi Water Heating
Lochinvar has long been the innovation leader in commercial boilers - and
now it’s bringing that engineering excellence to residential combi boilers.
Lochinvar’s legendary reliability and performance are now available for
apartments and homes, where the combi boiler’s next-generation fire tube
design can provide hot water supply and space heating faster and more
efficiently than ever before.
The NOBLE™ combi boiler provides a space-saving choice for builders and
specifiers, lowering installation costs by reducing the mechanical equipment
needed to provide rapid, reliable hot water supply and efficient space heating.
It also gives plumbing contractors a money-saving alternative for single-family
housing with 1 or 2 bathrooms.

Advanced Electronic Control
The backlit, user-friendly LCD display provides diagnostic
information and system status in real words, not codes.
The Set-Up Wizard display makes it simple to set system
parameters in just minutes.

What makes the NOBLE The Best Combi Boiler?
DELIVERS MORE HOT WATER
It’s sized large enough to quickly meet domestic hot water (DHW) load. Provides
DHW from 2.6 (NKC110) to 4.8 gpm (NKC199) at a 77°F temperature rise.
FASTER DHW RESPONSE TIME
With many combi boilers, when you turn on a hot water faucet, you initially get
hot water and then a brief burst of cold water before the hot water resumes. Thanks
to its patent-ending control technology, this combi boiler eliminates this cold water
“sandwich”.
10:1 TURNDOWN RATIO
Operates as low as 10% of the maximum firing rate, preventing on/off short
cycling at the lowest DHW demands or small heating demands.

25

F

G

I

C

FRONT

B

RELIEF VALVE

AIR INTAKE

NKC 150-199

D
E

E

TOP

G

I

D

E
E

F

F
F

F
A

K

H

NKC110
TOP

NOBLE Combi
Boiler
R

GAS

N
O

C

AIR INTAKE
C

I

FLUE

B

™

CONDENSATE
Dimensions
and Specifications
WATER

S

INLET/OUTLET
Input			
Heating NET AHRI 								
A
B
C
D
E
Model Max. Min.		 Capacity Rating
						
Number MBH MBH AFUE MBH
MBH

NKC110N
K
NKC150N
NKC199N

110
150
199

11
15
20

95.0%
95.0%
95.0%
P

102
139
MNTU
185

89
121
161

32-1/2”
32-1/2”
32-1/2”

17-1/4”
18-3/4”
18-3/4”

18”
18”
18”

14-3/4”
6-3/4”
5-1/2”

2”
2-1/2”
2-1/4”

3-1/2”
6-1/4”
5-1/2”

8-3/4”
2-3/4”
2-3/4”

13-1/2”
13-1/2”
13-1/2”

2-3/4”
3”
2-3/4”

9”
9”
9 1/2”

10-1/2”
11-1/2”
10-1/2”

A

A

L

Model
H
IQ
J
K
L
M
N
O
P
Q
O
Number										
NKC110N
NKC150N
NKC199N

RELIEF VALVE
RELIEF VALVE FLUE

BOTTOM

AIR INTAKE

B

L

PQ

I

H
HIGH VOLTAGE
CONNECTIONS

J

MN
MT U

O
P

H

NKC110

G

G

C

H

NKC110

S
R

J

D

D

G

I

GAS

Q
R

FLUE

FIRE TUBE COMBI

H
NOBLE™ Combi Boiler
Dimensions & Specifications

R

2-3/4”
2-3/4”
2-3/4”

Gas
Conn.

Water
Conn.

F

G

6-1/2”
6-3/4”
6-3/4”

2-3/4”
11-3/4”
11-1/2”

Air
Inlet

Vent
Size

Ship
Wt. (lbs)

5”
5”
2-3/4”

14-1/2”
12-3/4”
5”
1/2”
1”
3”
3”
139
6-1/4”
13-3/4”
6”
1/2”
1”
3”
3”
142
5-1/2”
13”
5-1/4”
1/2”
1”
3”
3”
159 HIGH VOLTAGE
HIGH
VOLTAGE
Notes: Indoor installation only. All information subject to change. Change "N" to "L" for LP gas models. *The Net AHRI Water Ratings shown are based on a piping and pickup
allowance
ofCONNECTIONS
1.15.
R

R
J

J

2000534158

Standard Features

> Smart System Digital Operating Control
> SMART CONTROL Digital Operating Control

> ENERGY STAR Most Efficient Recognition
> 95% DOE AFUE
Efficiency
K
K
> Modulating Burner with 10:1 Turndown

LCD Display with words not codes

> Outdoor Reset Control with Outdoor
Air Sensor
> Programmable System Efficiency Optimizers
		 DHW Response Time
		 DHW Pre Heat
Outdoor Air Reset Curve
> Two Pump Control
System Pump
Boiler Pump

> High-Voltage Junction Box
120 VAC / 60 Hertz / 1 Phase Power Supply

> Low Voltage Terminal Strip
		 Air Handler Interlock
Flow Switch Contacts
Low-Water Cutoff Connection
System Sensor Contacts
Outdoor Air Sensor Contacts
Cascade Contacts

Direct-Spark Ignition
Low-NOx Operation

S

S

Smart System™ Features

GAS

GAS

CONNECTIONS

CONDENSATE

CONDENSATE

WATER
WATER
INLET/OUTLET
INLET/OUTLET

Optional Equipment

P
Q

> ASME Stainless Steel
O
O Heat Exchanger

50 psi Working Pressure w/ASME Relief
Valve

> Vertical & Horizontal Direct-Vent
PVC, CPVC, Polypropylene or SS Venting
		 up to 100 feet

Low-Water Cutoff w/Manual Reset & Test
Concentric Vent Kit
MNTU
M N T U Condensate Neutralization Kit
Sidewall Vent Termination
P
Floor
L Stand
L
Q
Wireless Outdoor Sensor
		 Nat to LP Gas Conversion Kit
		 Isolation/Flush Valves

Firing Codes
> M9

Standard Construction/California Code

> Condensate Trap
> Other Features
Automatic Reset High Limit
Adjustable High Limit w/Manual Reset
Built-in Circulating Pump
Wall-Mount Bracket
Zero Clearances to Combustible Materials
10-Year Warranty
(See Warranty for Details)
5-Year Parts Warranty

2000534158

*Lochinvar should be consulted before selecting a boiler for
installations having unusual piping and pickup requirements, such
as intermittent system operation, extensive piping systems, etc.
*The ratings have been determined under the provisions governing
forced draft burners.

> Time Clock for Data Logging
Last 10 Lockouts

> Low-Water Flow Safety Control & Indication
> Password Security
> Built-in Cascading Sequencer for
up to 8 units

26

The Best All-Around Value in Today’s Home Heating Market
This modulating/condensing residential heating boiler offers fuel cost savings and
outstanding quality at lower cost than other high-efficiency designs. With gas inputs
from 40,000 to 120,000 Btu/hr, these wall-mount boilers can handle the heating load
for almost any home.

Stainless Steel Heat Exchanger with ASME ‘H’ Stamp

A commercial-grade ASME certified heat exchanger exemplifies the highest standards
for design, materials and manufacturing.

Fully Modulating Burner

Modulation adjusts the firing rate of the boiler to match the heat loss of the home,
reducing burner cycling and increasing overall system efficiency.

Outdoor Reset with Sensor

Monitors outdoor temperature to help CADET maintain a steady, consistent indoor
comfort level year-round. Allows boiler control to “reset” indoor water temperature as
needed when outdoor temperatures fluctuate.

Push-Button Digital Control

Constant display of actual output temperature,
and easy adjustment of setpoint.

Venting Versatility

CADET can be installed with a variety of venting configurations, including vertical or sidewall direct venting. Air intake and exhaust
vent runs up to 100 feet can be utilized to meet the most challenging installation requirements. 3” polypropylene, PVC, CPVC or
stainless steel pipe can be used. This venting flexibility is ideal for projects that will
require new vent material when a non-condensing boiler is being replaced.

Expanded Polypropylene (EPP) Jacket

Lightweight for easier handling. Deadens sound for quieter operation. Highly dent and
scratch-resistant.

94% AFUE Efficiency Reduces Heating Bills

For example, over 6 years, CADET could save over $1,400 in fuel costs.*
Depending on where it is installed, CADET may qualify for Energy Tax Credits.

$1,600

$1,200

$800

$400

1 YR

27

2 YR

3 YR

4 YR

5 YR

6 YR

*Fuel savings are compared to an 80%
AFUE boiler and based on a 70,000 Btu
heating load with 2,000 hours of operation
with a fuel cost of $1.13 per therm.

VENT

A

CADET® Boiler Dimensions & Specifications19-1/2"
AIR

15-3/4"

Top View

Bottom View
7-3/4"

Side View
2-1/2"

19-1/2"

AIR

15-3/4"

5-1/4"

OUTLET

GAS
1/2" NPT

13-3/4"

7-3/4"
2-1/2"

VENT
5-1/4"

B

C
D

13-3/4"

INLET

VENT

A

E
3-1/2"

CONDENSATE
DRAIN

9-1/4"
11" GAS

1/2" NPT A

OUTLET
GAS
1/2" NPT
B

B

C
D

OUTLET

E

Input		 Heating Net AHRI 									
A INLET B 3-1/2" C
D
E
Water
Air
Vent
Ship
Model Max. Min.		 Capacity RATING
Conn.
Inlet Size
Wt. (lbs)
Number MBH MBH AFUE MBH
MBH 						
CONDENSATE
9-1/4"
C
26”
4-1/4”
5-1/4”
4”DRAIN 2-1/2”
3/4”
2”
2”
94
CDN040
40
9
94%
37
32
11"
D E
26”
4-1/2”
5-3/4”
3”
1-1/2”
1”
2”
2”
98
CDN070 70 14
94%
65
57
26”
6”
5-3/4”
3”
1-1/2”
1”
2”
2”
102
CDN100INLET
100 203-1/2" 94%
93
81
26”
7-1/4”
7”
3”
1-1/2”
1”
3”
3”
108
CDN120 120 24
94% 112
97
CONDENSATE
9-1/4"

DRAIN

Standard Features

Optional Equipment

94% AFUE Efficiency
Modulating Burner
Direct-Spark Ignition
Low-NOx Operation
Field Convertible from Natural to LP Gas
ASME Heat Exchanger
30 psi ASME Relief Valve
Freeze Protection
Vertical & Horizontal Direct-Vent
PVC, CPVC, Polypropylene or SS Venting
up to 100 feet
Push-Button Digital Control
Outdoor Temperature Reset
(sensor included)
Boiler Pump Control
DHW Pump Control
Expanded Polypropylene Jacket
10-Year Limited Warranty
5-Year Parts Warranty

Concentric Vent Kit
Sidewall Vent Termination
2” to 3” CPVC Vent Connection Kit
Flow Switch
Condensate Neutralization Kit
Floor Stand
Low Water Cut-off w/ Manual Reset
and Test

11"

28

Flexibility is the SolutionTM

What could be better than a high-efficiency boiler that saves space,
saves money and helps resolve all your heating problems? How
about one that’s lightweight and simple to install too! That’s the
Solution™ boiler by Lochinvar®. From the highly efficient copper
finned tube heat exchanger, to our own specially designed two-stage
electronic control system, the Solution boiler offers these features
and many more in models up to 260,000 Btu/hr. Plus, all Solution
boilers are equipped with top water connections, a built-in draft
hood, and are approved for installation on combustible floors.

Copper Finned Tube Heat Transfer
The heart of the Solution boiler is its copper finned-tube heat
exchanger. With this unique gasketless design, we’ve combined the
best of both worlds: cast iron headers for long-lasting durability,
and a copper finned-tube heat exchanger for high efficiencies and
fast heat transfer. The gasketless design reduces the risk of leaks or
system failures that are common with conventional boilers. Plus,
the unit’s low-mass design means that water gets heated quickly. Not only is heat up time nearly instantaneous with the
Solution boiler, the energy consumption and operating costs are lower too, with a rating of 84% AFUE.

Two-Stage Control
The Solution boiler’s two-stage electronic temperature control with built-in outdoor reset provides
flexibility and saves fuel by closely matching heat output to system demand. On colder days the
boiler fires at full output, and in warmer conditions the Solution boiler reduces the setpoint heat
output to save energy and reduce boiler cycling.
During the majority of the heating season, less than full boiler output is required to satisfy the heat
load. For this reason Lochinvar has developed a two-stage firing system. Two-stage firing - standard equipment on all
Solution boilers, provides dramatic fuel savings by reducing the firing rate 50%. Two-stage firing is ideal for applications
utilizing indoor/outdoor reset and is advantageous in systems where the Solution boiler is used with an Squire indirect
water heater to produce domestic hot water.

PVC/CPVC Vent Kit (optional)
Vent up to 25’
out a sidewall or
rooftop with
PVC/CPVC
(CB 45-135).

Simple To Service

The Solution boiler is as flexible and convenient as it is efficient and
compact. For example, the heavy-duty stainless steel burners can easily
be adapted for use with either natural or liquefied petroleum (LP) gas.
What’s more, Solution boilers allow easy access to all major components
for servicing. We even designed the heat exchanger to slide out the
front of the boiler for faster maintenance, and we back it all up with our
exclusive 20-year Limited Warranty.

Built-In Piping Solutions
Other boilers often require system piping upgrades which are
cumbersome and expensive. The Solution boiler eliminates
this problem with its built-in, performance loop. The loop
maintains constant flow through the boiler when only a single
zone of the system is calling for heat. This helps maintain
peak system performance by keeping the copper heat transfer
surface clean and operating at top efficiency. And the top
water connections make replacements a snap by fitting into
existing piping arrangements without additional elbows and
connections.
You can depend on Lochinvar, and you can depend on the
Solution boiler to deliver the comfort, convenience, and
reliability you need. For more information, call your
Lochinvar dealer today.
29

Solution® Boiler Dimensions & Specifications

Solution Heating Boiler			
Model
Number

CBN045
CBN075
CBN090
CBN135
CBN180
CBN215
CBN260

Input 		
Max		
MBH
AFUE

45
75
90
135
180
215
260

84.0%
84.0%
84.0%
84.0%
84.0%
84.0%
84.0%

Dimensions & Spec­i­fi­ca­tions

Heating Net AHRI
Capacity Rating					
MBH
MBH
A
B
C
D

37
62
75
112
149
178
216

32
54
65
97
130
155
188

Notes: Change ‘N’ to ‘L’ to denote L.P. gas models
Net ratings based on piping and pick-up allowance of 1.15

29-1/2”
29-1/2”
29-1/2”
29-1/2”
29-1/2”
29-1/2”
29-1/2”

11-1/2”
15-1/2”
15-1/2”
19-1/2”
23-1/2”
26-1/2”
29-1/2”

21-1/2”
21-1/2”
21-1/2”
21-1/2”
21-1/2”
21-1/2”
21-1/2”

Electrical Requirements: 120 VAC / 2 AMP		
Approved for indoor installation only		

Standard Features

Optional Equipment

ASME Copper Finned Tube Heat Exchanger
Gasketless Heat Exchanger Design
Built-In Performance Loop
Top Water Connections
24 Volt Control System
Self Diagnostic Ignition Control
Terminal Strip
Intermittent Electronic Ignition
Two Stage Solid State Temperature Control
Outdoor Reset with Outdoor Sensor
System Sensor
Two Stage Gas Valve w/ Built In Manual Shut-Off
Domestic Hot Water Priority
160 PSI Working Pressure
Pump Relay
Automatic Reset High Limit
ASME Pressure Relief Valve
Temperature & Pressure Gauge
Automatic Vent Damper
Built-In Draft Diverter
Stainless Steel Burners
Loch-Heat Ceramic Tile Combustion Chamber
CSA Design Certified for Installation on Combustible Floors
CSA Design Certified for Alcove Installation
20 Year Limited Warranty on the Heat Exchanger (see warranty
for details)
2-Year Parts Warranty

Adjustable High Limit w/ Manual Reset
Flow Switch
Low Water Cut-Off
Stack Frame
Pump Delay w/ Freeze Protection
MP2 Sequencer
PVC/CPVC Venting Kit (CB 45-135)
O2 Barrier

5-3/4”
7-3/4”
7-3/4”
9-3/4”
11-3/4”
13-1/4”
14-3/4”

Gas
Conn.

Vent
Size

Ship
Wt.(lbs)

1/2”
1/2”
1/2’
1/2”
3/4”
3/4”
3/4”

4”
5”
5”
6”
7”
7”
8”

145
155
155
175
195
220
225

Water connections are 1-1/2” NPT
Performance data based on manufacturer test results.

Firing Control Systems
M9
M7

Two Stage, Intermittent Spark Ignition
California Code (CB215-260 only)

30

Buffer Tank/Hydraulic Separator

What is a Buffer Tank/Hydraulic Separator?

A Buffer Tank/Hydraulic Separator is designed to maximize the runtime and limit the
on/off cycling of a boiler while separating the boiler flow from the system flow. In
applications where the minimum system load is less than the minimum output of the
boiler, there is a high propensity for the boiler to excessively cycle on and off due to the
fact that the boiler is delivering more BTU’s than the system is requiring. In this case
the Buffer Tank is designed to act as a battery for BTU’s. The system demand is met
by using BTU’s that are already stored in the tank and thus delaying the boiler from
initiating a heating cycle until a minimum run time can be accomplished.
The Hydraulic Separator aspect of the tank is designed to de-couple the hydronic heating
system flow from the boiler flow by acting as a “separator” so that the two independent
flows do not affect one another. When the system flow is less than the minimum required
boiler flow there will likely be erratic system delivery temperatures and excessive boiler
cycling. These adverse affects can cause premature component failure, and in most cases,
boiler efficiency will be adversely affected.

When Should a Buffer Tank/Hydraulic Separator be Applied?

A Buffer Tank/Hydraulic Separator can be applied to keep the boiler from short cycling in
situations where the smallest building demand is less than the minimum rated output of the
boiler and/or in situations where system flow is less than the flow required by the boiler.

How is a Buffer Tank/Hydraulic Separator Sized?
A Buffer Tank/Hydraulic Separator is sized to provide a minimum runtime for the boiler plant. Use the equation below to find
the properly sized tank for your specific application. Tank connection diameters should be sized to meet the maximum flow
requirements of the application.

Buffer Tank
Capacity

=

Desired Run Time x (Minimum Boiler Output – Minimum System Load)
System rT x 8.33 x 60

• Desired Runtime- The Minimum period of time that the boiler should run before cycling off.
• Lochinvar recommends a minimum boiler runtime of no less than 10 minutes.
• Minimum Boiler Output- The amount of BTU’s that will be delivered at the minimum firing rate of the smallest boiler in the plant.
• Minimum System Load- The absolute smallest heat demand of the building.
• System Delta T- The difference between the system supply temperature and system return temperature.
• 8.33- The weight of one gallon of water.
• 60- The number of minutes in 1 hour

Buffer Tank / Hydraulic Separator Dimensions and Specifications
Model
Gallon							
Number Capacity		
A
B
C
D
E
BVU120
BVU200
BVU300
BVU400
BVU500
BVU750
BVU1000

120
200
300
400
500
750
1000

59-1/2”
89-1/2”
80”
80”
91”
104”
128”

32”
32”
40”
46”
46”
52”
52”

32”
32”
50”
56”
56”
62”
62”

43-3/4”
73-3/4”
57-1/2”
55”
66”
77”
101”

Standard
Ship.
Conn. Size Wt. (lbs)

13-3/4”
13-3/4”
26-1/2”
29”
29”
31”
31”

3” NPT
3” NPT
4” Flange
6” Flange
6” Flange
6” Flange
6” Flange

Notes: Custom Sizes and Configurations are Available, consult Factory for details.
Additional Recirculation & Supply/Return Connections Sizes Available, consult Factory for details.

Standard Features

•
•
•
•
•
•

31

ASME Sec. VIII U Stamp
125psi (Max. Allowable Working Pressure)
Automatic Air Vent
5 Year Limited Warranty
Pre-painted Jacket
2” HCFC Free Foam Insulation

Optional Equipment
•
•
•
•
•
•
•
•
•

Temperature and Pressure Gauge
Handhole
Manway (300 gallons and larger)
Custom Tapping Locations
Custom Tapping Diameters
Extra Tappings
Custom Tank Sizes
Flange or NPT Connections
Relief Valve (Shipped Loose)

500
900
1,290
1,626
1,765
2,330
3,010

C

Stainless Steel Buffer Tanks

Hydronic Stainless Steel Buffer Tank Dimensions and Specifications
1” NPT VENT CONNECTION (SBT)

3/4
3/4” NPT VENT CONNECTION (RBT)
*RBT Models only NPT Female
Connection (Typical)

Buffer Tank

3/4” DRAIN

Model
Number

Gallon							
Supply/Return
Capacity
A
B
D
E
F
G
Conn.

SBT030
SBT050
SBT080
SBT119

30
50
80
119

39-1/2”
47
69-1/2”
68-1/4”

20
24
24
28

28-3/4”
33-3/4”
55-3/4”
54-3/4”

20-1/4”
24-1/4”
35-1/4”
34-1/4”

11-3/4”
14-3/4”
14-3/4”
15”

7-3/4”
8-3/4”
8-3/4”
9”

1-1/2” NPT
1-1/2” NPT
2” NPT
2” NPT

Ship
Wt. (lbs)

70
120
153
198

Standard Features
•
•
•
•
•
•

R-13.4 HCFC free foam insulation for minimal heat loss
Textured, impact resistant polymer jacket
Light-weight 316L stainless steel tank construction
Bulbwell
Drain and air vent connections
5 year tank warranty

Hydronic Buffer Tank Dimensions and Specifications
Model Gallon						
Number Capacity A
B
D
E
F
G

Supply/Return
Conn.

Ship
Wt.(lbs)

RBT030

30

34-1/2” 20-1/2”

24-1/4”

17-1/8” 9-1/2”

4”

1-1/2” NPT

70

RBT050

50

53-7/8” 20-1/2”

41-5/8”

25-3/4” 9-1/2”

3-3/4”

1-1/2” NPT

120

RBT080

80

58-3/8” 24”

46-1/4”

29”

11-3/4” 3-3/4”

2” NPT

153

RBT119

119

61-5/8” 29-1/2”

48-1/2”

30-1/8” 11-3/4” 3-3/4”

2” NPT

198

Standard Features
•
•
•
•
•
•

Glass-lined Steel Tank
High Density Foam Insulation
Drain Valve
Air Vent Connection
Bulbwell
3-Year Tank Warranty

32

Stainless Steel Indirect

A New Class of Water Heater
• 17 Total Squire Models
6 Standard models from 30 to 119 Gallons
3 Dual Coil Models for Dual Source or
High Capacity 65 to 119 Gallons
3 Electric Back-up Models 65 to 119 Gallons
5 Double Wall Models 40 to 119 Gallons
• 316L Passivated Stainless Steel Tank
• 316L High Capacity Stainless Steel Coil
• Fully Welded Construction
• HCFC Free Foam Insulation
• Limited Lifetime Warranty

Stainless Steel Indirect SIT Models Dimensions and Specifications

SIT Models
SIT***(DW) Double Wall Models

SIT Models Dimensions and Specifications

								 Domestic
Model							 Water
Number
A
B
D
G
H
I
Conn.

Coil
Conn.
Size

Ship.
Wt. (lbs)

SIT030
SIT040(DW)*

39-1/2”
55-1/2”

20”
20”

32-1/4”
48-1/2”

21-3/4”
25-1/4”

8-1/4”
8-1/4”

3”
3”

1”
1”

1”
1”

79
105

SIT050(DW)
SIT065(DW)
SIT080(DW)
SIT119(DW)

47”
60”
69-1/2”
68-1/4”

24”
24”
24”
28”

39-3/4”
52-1/4”
61-3/4”
60-1/4”

24-1/2”
28”
28”
31-3/4”

9-1/4”
9-1/4”
9-1/4”
9-1/4”

3-3/4”
3-1/4”
3-1/4”
3-1/4”

1”
1-1/2”
1-1/2”
1-1/2”

1”
1”
1”
1”

131
147
177
213

*SIT040(DW) “A” = 38-1/4” and “B” = 24”, All other model dimensions are same for single and double wall models

			
Model
Capacity
Number (Gallons)

SIT030
SIT040
SIT050
SIT065
SIT080
SIT119

27
40
52
67
82
113

Heat Source
Water Volume
(Gallons)

Standby
Loss
(°F/Hr)

Continuous
Delivery
(GPH)

1st Hour
Delivery
(Gallons)

Min.
Coil Load
(Btu/Hr)

Flow
Rate
(GPM)

1.1
1.6
1.7
1.9
2.1
3.2

1.5
0.9
0.9
0.7
0.6
0.5

160
181
209
263
266
349

183
208
255
327
347
459

99,000
115,000
133,000
154,000
160,000
199,999

14.0
14.0
14.0
14.0
14.0
14.0

Friction
Loss
(Ft. Hd.)

3.9
4.5
5.3
5.7
5.7
6.5

Performance data is based on I=B=R test results. All ratings are based on 180°F boiler water temperature. Ratings for Double Wall models are decreased.
Please reference sales literature (SDW-02). Includes tank sensor for use with KNIGHT Heating Boiler.

Optional thermostat available for use with other boiler models.
33

Stainless Steel Indirect SDT & SET Models Dimensions and Specifications

FROM
PANEL

A
D

SET Models

G

TO
PANEL

H
I

FROM
PANEL

A

COLD WATER
INLET

D
SOLAR
SENSOR
WELL

SDT Models Dimensions and Specifications

G

TO
PANEL

H
										
Domestic
I
Model									
Water
Number
A
B
D
E
F
G
H
I
Conn.
COLD WATER
INLET

SDT065
SDT080
SDT119

60”
69-1/4”
68”

		
Model Capacity
Number (Gallons)

SDT065
SDT080
SDT119

24”
24”
28”

52-1/4”
61-3/4”
60-1/4”

Solar Heat
Source Water
Volume (Gals.)

65.5
78.4
109.8

2.1
2.1
3.2

47-1/4” 33-3/4” 28”
9-1/4”
53-3/4” 40-1/4” 28”
9-1/4”
54-1/2” 37-1/2” 31-3/4” 9-1/4”
Boiler Heat
Standby
Source Water
Loss
Volume (Gals.) (°F/Hr)

1.7
1.7
2.6

0.7
0.6
0.5

3-1/4”
3-1/4”
3-1/4”

1-1/2”
1-1/2”
1-1/2”

Continuous 1st Hour
Delivery
Delivery
(GPH)
(Gallons)

174.6
174.6
250.2

204.7
207.1
300.5

Coil
Connection
Size

Ship
Wt. (lbs)

1”
1”
1”

158
188
224

Min.
Coil Load
(Btu/Hr)

128,000
128,000
181,000

Stainless Steel Indirect

SDT Models

SOLAR
SENSOR
WELL

Flow Friction
Rate
Loss
(GPM) (Ft. Hd.)

14.0
14.0
14.0

3.4
3.4
4.9

Performance data based on incoming cold water at 50°F and a Delta T of 77°F. Delivery ratings for boiler coil only. Includes tank sensor for use w/ KNIGHT Heating Boiler.

SET Models Dimensions and Specifications
							Domestic
Model							
Water
Number
A
B
D
F
H
I
Conn.

SET065
SET080
SET119

60”
69-1/2”
68-1/4”

24”
24”
28”

52-1/4”
61-3/4”
60-1/4”

28”
28”
31-3/4”

9-1/4”
9-1/4”
9-1/4”

3-1/4”
3-1/4”
3-1/4”

		Solar		
Electric
			
Heat Source
Standby
Continuous
Model
Capacity
Water Volume
Loss
Delivery
Number (Gallons)
(Gallons)
(°F/Hr)
(GPH)

SET065
SET080
SET119

67.0
80.9
112.4

1.9
2.1
3.2

0.7
0.6
0.5

23.9
23.9
23.9

1-1/2”
1-1/2”
1-1/2”

Coil
Conn.
Size

Ship
Wt. (lbs)

1”
1”
1”

149
179
215

Electric
1st Hour
Delivery
(Gallons)

54.0
56.4
74.2

All SET models: 4500w 240v 1 phase.

34

System

Another Space-Saving Idea
Lochinvar’s technology not only makes our water heaters
and boilers more efficient, they also have a smaller
footprint. So they save space, as well as operating costs.
And now there’s a way to get greater flexibility and
reliability, save even more space, and get a system
that’s perfectly matched to a facility–thanks to the
Stack Frame from Lochinvar.

Match Load And Capacity

With this versatile frame, you can stack almost any
combination of our ARMORTM, KNIGHT®, Copper-Fin®,
Copper-Fin II®, and SolutionTM water heaters and boilers
so you can achieve the perfect Btu/hr capacity for each
application.
For example, a facility needs a Copper-Fin II boiler with
a total capacity of 1.6 million Btu/hr. Instead of installing
an oversized CHN1802 unit or a smaller CHN1442
model, now you can combine two units – CHN0992 and
CHN0652 models– to exactly match the facility’s needs.
Plus, the total footprint of this combined system is just
over 10 inches wider that the CHN0652 unit alone,
making it smaller than either the CHN1802 or CHN1442
model. All thanks to the Lochinvar Stack Frame.

No Assembly Required

Lochinvar’s Stack Frame is fully factory assembled and
shipped in one piece. The frame is welded using square steel
tubing by certified welders. Each frame is designed and tested
for each specific application.

Added System Benefits

This modular design provides two other important benefits.
First, it allows for system turndown for greater efficiency when
demand is lower. And second, it ensures against system failure
by utilizing two independent but complimentary units.
For residential and light commercial needs or commercial
applications of up to 4 million Btu/hr the Stack Frame gives
greater flexibility without a significant increase in stack size or
overall system dimensions.
Once you’ve determined a facility’s requirements and the exact
models needed, utilize the charts provided to calculate total
system dimensions.
NOTE: Stack Frames are for indoor applications only.
Our compact KNIGHT® requires even less space
when stacked on a Stack Frame.

35

KNIGHT® Heating Boilers (Models 081-801)

SolutionTM Boilers (Models 045-500)

Knight® Wall Mount Boilers
(Models 55-399)

CadetTM Boilers (Models 40-120)

A

A
A

MODEL #

PART #

A*

KB 081-211 MSF3043 90-1/2”
KB 286-501 MSF3044 109”
KB 601-801 MSF3052 109”

C

B

C
C

B**

C

Wt. (lbs)

26”
26”
26”

26”
34”
43”

60
72
94

Note: Heater height is 33-1/4” KB 81-121
			Heater height is 42-1/2” KB 286-501
		

MODEL #
CB 045
CB 075
CB 090
CB 135
CB 180
CB 215
CB 260
CB 315
CB 360
CB 399
CB 500

PART #
MSF 3034
MSF 3034
MSF 3034
MSF 3034
MSF 3034
MSF 3035
MSF 3035
MSF 3035
MSF 3035
MSF 3036
MSF 3036

A*
65-1/2”
65-1/2”
65-1/2”
65-1/2”
65-1/2”
65-1/2”
65-1/2”
65-1/2”
65-1/2”
65-1/2”
70-1/2”

B**
36”
36”
36”
36”
36”
48”
48”
48”
48”
65”
65”

C
C

BB

C Wt. (lbs)
39”
73
39”
73
39”
73
39”
73
39”
73
39”
84
39”
84
39”
84
39”
84
39”
147
39”
147

System

BB

A
A

PART #
A*
B** C Wt. (lbs)
MSF30018 60-1/4” 17-1/2” 36” 50

Note: Heater height is 29-1/2” (45 - 399) and 34-1/2”

(500).

Copper-Fin® Boilers
(Models 0497-0747)
MODEL #

PART #

A*

B**

C

CB 0497

MSF3002

81-1/2”

51”

24-1/2”

Wt. (lbs)
70

CB 0647

MSF3003

84-1/2”

70”

26”

128

CB 0747
MSF3003
84-1/2”
70”
26”
Note: Heater Height is 33-1/4” (0497-0747)

128

A

B

C
Copper-Fin II® Boilers
(Models 0402-2072)

MODEL #

A

PART #

A*

B**

C

Wt. (lbs)

CH 0402

MSF3022

67-1/2”

59”

24-1/2”

CH 0502

MSF3022

67-1/2”

59”

24-1/2”

83
83

CH 0652

MSF3023

67-1/2”

80”

24-1/2”

132

CH 0752

MSF3023

67-1/2”

80”

24-1/2”

132

CH 0992

MSF3007

80”

75”

36”

170

CH 1262

MSF3008

80”

95”

36”

214

CH 1442

MSF3008

80”

95”

36”

214

CH 1802

MSF3009

80”

119”

36”

251

CH 2072

MSF3009

80”

119”

36”

251

Note: Heater height is 31-1/2” (0402-0752) & 36” (0992-2072)

B

C

* To vent connection
** Allow space for plumbing connections

36

Commercial Electric Compact Boilers

Standard Features

Optional Equipment

•
•
•
•
•
•
•
•
•

• Alarm Buzzes with Silencing Switch
• Automatic Breaker
• Flow Switch
• ABB Fused Disconnect
• Non-Fused Disconnect
• Ground Fault Detection system
• Low Temperature Switch
• Kilowatt/Hour Meter
• Flanged Water Connections
• Amp Meter
• Volt Meter
• High Pressure limit switch
• Control Panel door solenoid interlock
• Low water cutoff-float type
• BMS alarm interface
• BMS remote set point control
• BMS remote step control
		 (remote enable)
• BMS 120V interface to limit boiler
power demand
• BMS 24V interface to limit boiler
		 power demand
• Time clock
• 304 stainless steel vessel &
		 non ferrous trim
• 3” connections
• 4” connections

•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

ASME National Board Registered Pressure Vessel
Heavy Duty Steel Boiler Vessel Housing
4” Fiberglass Insulation
3” NPT Inlet and Outlet Connection
ASME Pressure Relief Valve
Pressure Gauge with Cock
Drain Valve
Adjustable High Limit with Automatic Reset
Adjustable High Limit with Manual Reset
(units with more than 2 stages)
Low Water Cut-Off
Incoloy-Sheathed Elements
Internal Branch Circuit Fusing
Magnetic Contactors
Main Supply Circuit Lugs
120 Volt Fused Control Transformer
On/Off Switch with Pilot Light
Manual Limit Toggle Switches (1 per step)
Integeral Electric Control Panel with key locked door
Electronic Multi-Stage Control
Status Pilot Light for each Step
Electric Digital Temperature Readout
(except 1 & 2 step models)
Listed by the Underwriters Laboratories
3 Year Limited Tank Warranty
1 Year Parts Warranty (See warranty for details)

Commercial Electric Compact Boiler Dimensions & Specifications

Components

**

Inlet Pipe for
14” Flange or
Flow Switch
Option.

Model
Number
BW*1-**C
BW*2-**C
BW*3-**C

Max. Flow
(gpm)
230
230
¤
230

4”/300 GPM is Optional

¤

37

Connection
Sizes (NPT)
3”
3”
3”

Dia
(In)
12”
16”
20”

Vol
(Gal)
22
36
56

A
52”
52”
52”

Dimensions
B
24”
28”
32”

Ship
C Wt.(lbs)
30”
600
34”
800
38”
1,100

** Power Panel will be taller or wider for ABB Disconnect option. Consult factory.

1. Temperature Limit, Auto Reset
2. Temperature Limit, Manual Reset
3. Manual Limit Switches
4. Pilot Lights, Amber (Steps “On”)
5. PB Switches
(Low Water Cutoff “Test”/”Reset”)
6. Toggle Switch (Control Power)
7. Pilot Light, Amber
(Control Power “On”)
8. Pilot Light, Red (Low Water)
9. Temperature Setpoint
/ Control / Readout
10. Safety Relief Valve
11. Temperature & Pressure Gauges
12. Drain Valve

(See warranty for details)

Optional Equipment

•
•
•
•
•
•
•
•
•
•

Alarm Buzzer w/silencing switch
Automatic Breaker
Flow Switch
Non Fused Disconnect
Fused Disconnect
Ground Fault Detection System
Low Temperature Switch
Main Power Disconnect
Manual Limit Toggle Switches (1 per step)
Kilowatt/Hour Meter

•
•
•
•
•
•
•
•
•
•

Amp Meter
Volt Meter
High Pressure limit switch
Control Panel door solenoid interlock
Low water cutoff-float type
BMS alarm interface
BMS remote set point control
BMS remote step control (remote enable)
BMS 120V interface to limit boiler power demand
BMS 24V interface to limit boiler power demand

•
•
•
•
•
•

Time clock
304 stainless steel vessel & non ferrous trim
3” connections
4” connections
BACnet Communications
Modbus Communications

Commercial Electric Hot Water Boilers

Standard Features
• ASME National Board Registered Pressure Vessel
• Heavy Duty Steel Boiler Vessel Housing
• Full Sized Structural Steel Base
• 3” Fiberglass Insulation
• Flanged Inlet and Outlet Connection (above 3”)
• ASME Pressure Relief Valve
• Pressure Gauge with Cock
• Full Port Drain Valve
• Low Water Cut-Off with Manual Reset
• Manual Limit Toggle Switches (one per step)
• Adjustable High Limit with Automatic Reset
• Adjustable High Limit with Manual Reset
• Incoloy Sheathed Elements
• Internal Branch Circuit Fusing
• Magnetic Contactors
• Main Supply Circuit Lugs
• 120 Volt Fused Control Transformer
• On/Off Switch with Pilot Light
• Integral Electric Control Panel with Key Locked Door(s)
• Electronic Multi-Stage Control
• Status Pilot Light for each Step
• Digital Electronic Readout
• Listed by the Underwriters Laboratories
• 3 Year Limited Tank Warranty / 1 Year Parts Warranty

Commercial Electric Hot Water Boiler Dimensions & Specifications

Note 1: Element removal clearance (R”)
is equal to 2 times the element kW.
Note 2: Optional equipment may change
overall boiler dimensions. Please consult
factory for dimensional information.

		
Max
Model Input
Number kW
BW*24		
BW*24		
BW*30		
BW*36		
BW*42		

600
1076
1825
2246
3089

MBH
Per
Hour

2047
3673
6228
7665
10539

Max
# of
Elements
30
46
78
100
150

Connection
Sizes (NPT)
In/Out
Drain

4” FLG
6” FLG
6” FLG
8” FLG
10” FLG

1-1/4”
1-1/2”
1-1/2”
2”
2”

Max.
Flow
GPM
470
680
900
1,170
1,840

Tank
Dims
(In)
24x44
24x44
30x48
36x48
42x50

Data
Dimensions		
Weight
Vol		
(Inches)		
(lbs)
(Gal)
A
B
C
D
Ship Oper.
70
70
125
165
260

34”
34”
40”
46”
54”

40”
40”
50”
56”
76”

52”
56”
60”
62”
64”

51”
63”
75”
87”
77”

1,300
1,500
1,900
2,400
3,600

1,860
2,060
2,900
3,720
5,760

38

LTV Low Temperature Valves

Ideal for Use with Copper-Fin,
Copper-Fin II and Power-Fin Boilers
When designing a boiler system with return water temperatures
below 130°F, it is necessary to protect the boiler from flue gas condensation. All
non-condensing boilers will develop operational problems if they are continually
exposed to system return water temperatures below 130°F. Typical systems that
require this protection are water source heat pump systems, in-floor radiant heat
systems, greenhouse heating, soil heating, process operations and manufacturing operations.
Additionally, heating systems that utilize nighttime setback, night/weekend shutdown or outdoor
reset control strategies should incorporate low water temperature protection.
To prevent low return water temperatures to the boiler and combat operational problems, the system should be piped in a primary
secondary piping arrangement with a low temperature bypass. Manual bypass systems however are not the ideal solution due to varying
flow rates and firing rate of the boiler. A better alternative is Lochinvar’s Low Temperature Valve, which is a self-contained automatic
thermostatic 3-way valve that ensures temperatures entering the boiler remain above 140°F.

LTV Valve Dimensions & Spec­i­fi­ca­tions
2-1/2” LTV Valve

2” LTV Valve

1-1/2” LTV Valve

Over 55 GPM flow rate
Part Number - 100172000
Note: Mounting flange Included with valves.

Up to 55 GPM flow rate
Part Number - 100172001

Up to 55 GPM flow rate
Part Number - 100171919

TOP

11”

4” LTV Valve
7.94

Over 225 GPM flow rate
Part Number - 100275912

TYPICAL PIPING

A

TOP

15.88

All boilers must use optional remote sensor.
Minimum high limit setting is 205°F.
Pump supplied by installer.

B
11”

TOP

C

8.56
13.06

7.94

11”

A

15.88

B

FRONT
7.94

A

15.88

13.06

FRONT

8.56
13.06

C

8.56

B

C

2” LTV Valve

FRONT

2-1/2” LTV Valve
4” LTV Valve
39

1-1/2” LTV Valve
2-1/2” LTV Valve

Lochinvar, LLC
300 Maddox Simpson Parkway
Lebanon, Tennessee 37090
P: 615.889.8900 | F: 615.547.1000

Lochinvar.com

ASB-10M-7/17–Printed in U.S.A.



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