Bradfordwhite Residential Boiler Wall Mounted Brute Ft Bmftcw Combination Iomanual 1318E Nh User Manual

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Installation and Operation Instructions

Document 1318E

Installation and Operation
Instructions for

THE

FT SERIES

Wall-Mounted, Modulating
Gas, Condensing, Combination Boiler
Model FTCW
140,000 BTU/hr
199,000 BTU/hr

• Natural Gas (NG) - Factory Configuration
• Propane Gas (LP) - Field-Convertible
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hot water boiler and heater installation and maintenance. Improper installation and/or operation
could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or
death. Improper installation and/or operation will void the warranty.
WARNING
If the information in this manual is not
followed exactly, a fire or explosion may
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
the fire department.

H2372800E

Installation and service must be performed
by a qualified installer, service agency, or gas
supplier.

AVERTISSEMENT
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.

Ne pas entreposer ni utiliser d’essence ou ni
d’autres vapeurs ou liquides inflammables dans
le à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE
GAZ:
• Ne pas tenter d’allumer d’appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones dans le bâtiment où vous vous
trovez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le sservice des incendies.
L’installation et l’entretien doivent être assurés par
un installateur ou un service d’entretien qualifié

ou par le fournisseur de gaz.

SECTION 1
Product Accessories

TABLE OF CONTENTS

1.1 Introduction............................................................ 1
1.2 Included with the Appliance.................................... 1

SECTION 2
Product Characteristics
2.1
2.2
2.3
2.4
2.5

Model Nomenclature (model number).................... 3
Specifications......................................................... 4
Dimensions............................................................ 6
Names of Components.......................................... 8
Product Flow and Characteristics........................ 10
2.5.1 Central Heating Flow...................................10
2.5.2 Domestic Hot Water Flow........................... 11

SECTION 3
Safety Regulations
3.1 Safety Symbols.................................................... 12
3.2 Safety Precautions and Proper Use..................... 14

SECTION 4
Installation
4.1 Location and Clearances......................................16
4.2 Wall Mount Bracket...............................................17
4.2.1 Installation Height and Location..................17
4.2.2 Hang the Boiler...........................................17
4.3 Combustion Air......................................................18
4.3.1 Combustion Air from Room.........................18
4.3.2 Ducted Combustion Air...............................18
4.4 Venting (exhaust)..................................................20
4.5 General Location Guidelines.................................21
4.6 Locations for Vent Pipe Terminator.......................22
4.6.1 Direct Venting Clearances...........................22
4.6.2 Non-Direct Venting Clearances...................23
4.6.3 Venting Requirements in Massachusetts....24
4.7 Air Supply and Vent Connections at the Appliance..26
4.7.1 Vent / Air Pipe Lengths................................26
4.7.2 Direct Venting..............................................26
4.7.3 Indoor Combustion Air.................................27
4.8 Vent / Air Pipe Termination....................................28
4.9 Gas Supply and Piping..........................................30
4.10 Gas Supply Pressure...........................................33
4.11 Gas Set Up and Adjustment.................................33
4.12 High Altitude Installations. 2,000' to 10,000'.........34
4.13 Natural Gas to Propane Conversion....................36
4.14 Plumbing Guidelines............................................40
4.15 Pressure Relief Valve...........................................43
4.16 Disposal of Condensate.......................................44

4.17 DHW Flow Restrictors..........................................45
4.18 Electrical Wiring Connections............................. 46
4.19 DIP Switches....................................................... 47
4.20 Control Board, Electrical Diagram ....................... 48
4.21 Ladder Diagram.................................................. 49
4.22 Electrical Connections......................................... 50

SECTION 5
Control Display and Operation
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10

Control Dial and Buttons........................................52
LCD Overview........................................................53
Operating Mode...................................................54
Status Display Mode............................................55
DHW Set Point Change Mode.............................56
CH Set Point Change Mode.................................57
Storage Mode.......................................................57
Installer Mode.......................................................58
Outside Temperature (option)...............................60
External Set Point Temperature Control...............60

5.11 Error Mode...........................................................61

SECTION 6
Error Codes
6.1 Error Codes.......................................................... 62
6.2 Fault Tree Analysis............................................... 65

SECTION 7
Trouble Shooting
7.1 Diagnostics........................................................... 67
7.2 Suggested Corrective Actions.............................. 68

SECTION 8
Maintenance
8.1 Annual Startup and General Maintenance........... 70
8.2 Flushing the Boiler............................................... 72
8.3 Draining and Cleaning.......................................... 73

SECTION 9
Installation Check
9.1 Quick View........................................................... 74
9.2 Final Check Lists.................................................. 74

SECTION 10
Repair Part Diagram
10.1 Parts List and Illustrations............................... 76-81
10.2 Notes: ................................................................... 82

Page 1

The FT Series Wall Mounted, Combination Boiler

SECTION 1
Product Accessories
1.1 Introduction

This manual provides information necessary for the
installation, operation, and maintenance of the FT Series
Wall Mounted, Combination Boiler. All application
and installation procedures must be read and reviewed
completely before proceeding with the installation. Consult
the factory, or your local factory representative, with any
problems or questions regarding this equipment. Experience
has shown that most operating problems are caused by
improper installation.

All installations must be made in accordance with
1) American National Standard Z223.1/NFPA54-Latest Edition
“National Fuel Gas Code” or
2) CSA B149.1 “Natural Gas and Propane Installation Code” and
with the requirement of the local utility or other authorities having
jurisdiction. Such applicable requirements take precedence over
the general instructions contained herein.
All electrical wiring is to be done in accordance with the local
codes, or in the absence of local codes, with: 1) The National
Electrical Code ANSI/NFPA No. 70-latest Edition, or 2) CSA
STD. C22.1 “Canadian Electrical Code - Part 1”. This appliance
must be electrically grounded in accordance with these codes.

1.2 Included with the Appliance

Item

Description

Qty

Wall Mounted,
Combination Boiler
FTCW140 / 199

1

THE

Installation Instructions and
User’s Manual

FT

THE

FT

1

Page 2

1.2 Included with the Appliance (continued)
Items

Descriptions

Qty

Condensate Hose

1

FT1894

Wall Mount Bracket

2 types of Wall Anchors

4

1

4

Pressure Relief Valve
(CH LINE 3/4˝ 30psi)
Model: CASH ACME F-82

1

3” Mesh Screens

2

O-Ring and Gasket Kit

1

Outdoor Sensor
with screws and anchors

1

4.5 GPM Flow Restrictor
(dark blue)

FTCW140

FTCW199

*

N/A

Propane Conversion Orifice

*A 3.2 GPM Flow Restrictor (white) has been factory installed. See Section 4.17

1

1

Page 3

The FT Series Wall Mounted, Combination Boiler

SECTION 2.

Product Characteristics
2.1

Model Nomenclature (model number)

The Model Nomenclature is shown on your Rating Plate and consists of a series of letters and numbers
( Nomenclature ) that further identifies the characteristics of your FT.
1

2

3

4

M

F
		

T

C

SERIES
FT

5

9

10

11

12

13

W					

A

1

X

N		

CONFIG
C - Combination

W - Wall Hung

6

7

SIZE
MBTU/h
140
199

8

FUEL
N - Natural

ALTITUDE
A - 0 -10,000 Feet

P - Propane

Figure 1. Model Nomenclature

MODEL NUMBER

Figure 2. Locating the model number

REVISION
1 - First

OPTIONS
X - Standard

PUMP
N - with Pump

Page 4

2.2

Specifications
Model Name

FTCW140
MAX

140,000 Btu/h

MIN

28,000 Btu/h

35°F Rise

7.1 GPM

45°F Rise

5.5 GPM

77°F Rise

3.2 GPM

Gas Input Rate

Hot Water Capacity

Installation

Indoor / Wall hung type

Flue System

Sealed Combustion Direct / Single Vent / Concentric Vent

Vent Run

2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP, PVC

Gas Supply Pressure

Manifold Pressure

Power Supply

NG

3.5˝ WC to 10.5˝ WC

LP

8.0˝ WC to 13˝ WC

Gas type

NG

LP

Vent size

2˝ or 3˝ VENT

2˝ or 3˝ VENT

Max Fire

-0.216” WC

-0.216” WC

Min Fire

0.002” WC

0.079” WC

Main Supply

120V 60Hz / 4A

Maximum Power
Consumption

160W

Ignition System

Direct Electronic Ignition / Automatic Flame Sensing

Burner System

Single Orifice Premixed Fuel Modulation

Gas Valve System

Combination modulating (Current proportional)

Minimum Flow Rate

0.5 GPM

Dimensions

W17.25˝ - H29.0˝ - D15.5˝

Weight

110 lbs

Sub Heat Exchanger Water Capacity(DHW)

Under 1 Gallon

Main Controller / Control Panel

NGTX-900CP / P-920C

Domestic Hot Water Pressure, DHW

Min 15 ~ Max 150 PSI

Central Heat Water Pressure, CH

Min 15 ~ Max 30 PSI

Connection Sizes

Materials

Cold Water Inlet / Hot Water
Outlet

3/4˝ NPT

(CH) Space Heating Supply/Return

1˝ NPT

Gas Inlet

3/4˝ NPT

Casing

Cold Rolled Carbon Steel

Heat Exchanger

Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel

Safety Devices

Flame Rod, Overheat Cut Off Device, Gas Valve Operation Detector, Exhaust Temperature High Limit Switch,
Water Temperature High Limit Switch

Page 5

The FT Series Wall Mounted, Combination Boiler

2.2

Specifications (continued)
Model Name

FTCW199
MAX

199,000 Btu/h

MIN

19,900 Btu/h

35°F Rise

9.88 GPM

45°F Rise

7.7 GPM

77°F Rise

4.8 GPM

Gas Input Rate

Hot Water Capacity

Installation

Indoor / Wall hung type

Flue System

Sealed Combustion Direct / Single Vent / Concentric Vent

Vent Run

2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP, PVC

Gas Supply Pressure

Manifold Pressure

Power Supply

NG

3.5˝ WC to 10.5˝ WC

LP

8.0˝ WC to 13˝ WC

Gas type

NG

LP

Vent size

2˝ VENT

3˝ VENT

Max Fire

-0.314”WC

-0.173”WC

Min Fire

-0.015”WC

-0.015”WC

Main Supply

120V 60Hz / 4A

Maximum Power
Consumption

160W

Ignition System

Direct Electronic Ignition / Automatic Flame Sensing

Burner System

Single Orifice Premixed Fuel Modulation

Gas Valve System

Combination modulating (Current proportional)

Minimum Flow Rate

0.5 GPM

Dimensions

W19.6” - H32.0” - D16.3”

Weight

130 lbs

Sub Heat Exchanger Water Capacity(DHW)

Under 1 Gallon

Main Controller / Control Panel

NGTX-900CP / P-920C

Domestic Hot Water Pressure, DHW

Min 15 ~ Max 150 PSI

Central Heat Water Pressure, CH

Min 15 ~ Max 30 PSI

Connection Sizes

Materials

Cold Water Inlet / Hot Water
Outlet

3/4˝ NPT

(CH) Space Heating Supply/Return

1˝ NPT

Gas Inlet

3/4˝ NPT

Casing

Cold Rolled Carbon Steel

Heat Exchanger

Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel

Safety Devices

Flame Rod, Overheat Cut Off Device, Gas Valve Operation Detector, Exhaust Temperature High Limit Switch,
Water Temperature High Limit Switch

Page 6

2.3 Dimensions

FTCW140

Air Intake
Vent

Description

Diameter

A

Air Intake collar

3"

B

Vent Pipe Collar

3"

C

‘CH’ Supply

1" NPT

D

‘CH’ Return

1” NPT

E

‘DHW’ Outlet

3/4” NPT

F

‘DHW’ Inlet

3/4” NPT

G

Gas Inlet

3/4” NPT

H

Condensate Line

1/2" NPT

Page 7

The FT Series Wall Mounted, Combination Boiler

2.3 Dimensions

FTCW199

Air Intake
Vent

Description

Diameter

A

Air Intake collar

3"

B

Vent Pipe Collar

3"

C

‘CH’ Supply

1" NPT

D

‘CH’ Return

1” NPT

E

‘DHW’ Outlet

3/4” NPT

F

‘DHW’ Inlet

3/4” NPT

G

Gas Inlet

3/4” NPT

H

Condensate Line

1/2" NPT

Page 8

2.4 Names of Components

FTCW140

30

#

Name of Component

#

Name of Component

1

Air Vent (air eliminator)

16

Condensate Connection

2

Pressure Relief Valve

17

Condensate Trap

3

Air Intake Collar

18

Air Pressure Switch (condensate)

4

Air Gas Mixing Pipe

19

Mixing Valve

5

Gas Valve

20

Terminal Block

6

DHW Water Tank

21

Control Panel and Display

7

Main PCB

22

Heat Exchanger

8

Manual Power Switch (ON / OFF)

23

Ignition Trans

9

Recirculation Pump DHW / CH Primary Pump

24

Flame Detecting Sensor

10

'CH' Supply Connection

25

Burner Case

11

'CH' Return Connection

26

BLDC Fan (Blower)

12

CH Pressure Gauge

27

Vent Pipe

13

DHW Outlet Connection

28

Air Pressure Switch

14

Gas Inlet Connection

29

Vent Pipe Collar

15

DHW Inlet Connection (filter and flow restrictor)

30

Sight Glass

Page 9

The FT Series Wall Mounted, Combination Boiler

FTCW199

#

Name of Component

#

Name of Component

1

Air Vent (air eliminator)

16

Condensate Connection

2

Pressure Relief Valve

17

Condensate Trap

3

Air Intake Collar

18

Air Pressure Switch (condensate)

4

Gas Valve

19

Mixing Valve

5

Air Gas Mixing Pipe

20

Terminal Block

6

DHW Water Tank

21

Control Panel and Display

7

Main PCB

22

Heat Exchanger

8

Manual Power Switch (ON / OFF)

23

Ignition Trans

9

Recirculation Pump DHW / CH Primary Pump

24

Flame Detecting Sensor

10

'CH' Supply Connection

25

Burner Case

11

'CH' Return Connection

26

BLDC Fan (Blower)

12

CH Pressure Gauge

27

Vent Pipe

13

DHW Outlet Connection

28

Air Pressure Sensor

14

Gas Inlet Adapter

29

Vent Pipe Collar

15

DHW Inlet Connection (filter and flow restrictor)

30

Sight Glass

Page 10

2.5 Product Flow Paths and Characteristics
2.5.1 Central Heating flow. Combination Boiler Heating Mode.
Water in the heating pipe is used for space heating.

FTCW140
Combustion
Air

Hydronic Supply
Hydronic Return

FTCW199
Vent

Combustion
Combustion
Air
Air

Hydronic Supply
Supply
Hydronic
Hydronic Return
Hydronic
Return

Vent
Vent

Page 11

The FT Series Wall Mounted, Combination Boiler

2.5 Product Flow Paths and Characteristics
2.5.2 Domestic Hot Water flow.

Combination Boiler Domestic Hot Water Mode.

Cold water passes through the exchanger and is heated via a mini indirect tank.
The domestic hot water (DHW) is provided on demand.

FTCW140
Combustion
Combustion
Air
Air

FTCW199
Vent Vent

Return
DHW SupplyHot DHW
Domestic
Domestic
Hot
Hydronic Return
Water Outlet Water Inlet

ydronic Supply

Combustion
Combustion
Air
Air

DHW
DHW Supply
Supply

Vent
Vent

DHW
DHWReturn
Return

Page 12

SECTION 3.

Safety Regulations
3.1 Safety Symbols

WARNING

To avoid product damage, personal injury, or even
possible death, carefully read, understand, and
follow all the instructions in the Installation and
Operation manual before installation, operation
and service the Boiler.
Manufacturer cannot anticipate every
circumstance that might involve a potential
hazard. Therefore, all possible incidents are not
included in our warnings. Proper installation,
operation, and service are your responsibility.
You must make sure that the operation and
settings of the Boiler are safe for you and for
others.
This manual provides Safety Symbols. When the
user fails to adhere to the following requirement,
it may cause death, serious injury, and substantial
property damage.
For safety symbols, ‘DANGER’, ‘WARNING’,
CAUTION’ are indicated and the definitions for these
terms are as follow:

DANGER
Indicates an imminently hazardous situation
which, if not avoided, will result in death or
serious injury. This signal word is limited to the
most extreme situations.

WARNING
Indicates a potentially hazardous situation
which, if not avoided, could result in death or
serious injury.

CAUTION
Indicates a potentially hazardous situation
which, if not avoided, may result in minor or
moderate injury. It is also used to alert against
unsafe practices and hazards involving only
property damage.

WARNING
FOR YOUR SAFETY READ BEFORE
OPERATING

If you do not follow these instructions exactly, a
fire or explosion could result causing property
damage, personal injury or loss of life.
A. This appliance does not have a pilot. It
is equipped with an ignition device which
automatically lights the burner. Do not try to
light the burner by hand.
B. BEFORE OPERATING smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any
phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the
fire department.
C. Use only your hand to push in or turn the gas
control knob. Never use tools. If the knob will
not push in or turn by hand, don’t try to repair
it, call a qualified service technician. Force
or attempted repair may result in a fire or
explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a qualified
service technician to inspect the appliance and
to replace any part of the control system and
any gas control which has been under water.

This appliance must be installed in accordance with
local codes if any; if not, follow ANSI Z224.1/NFPA
54 or CAN/CSA B149.1, Natural Gas and Propane
Installation Code, as applicable.
This appliance is certified for use at altitudes up
to 4,500ft(1,370m) in accordance to the latest CSA/
CGA 2.17-M91 Gas-Fired Appliances for Use at
High Altitudes.

The FT Series Wall Mounted, Combination Boiler

Page 13

damaging condition that might affect the operation
of the unit. Boiler must be checked by a qualified
technician before resuming operation.

DANGER
	Vapors from flammable liquids will explode and
catch on fire. These will cause death or severe
burns.
Do not use or store flammable products such as
gasoline, solvents or adhesives in the same room
or area near the appliance.

Keep flammable products
	Far away from boiler
	In approved containers
	Tightly closed
	Out of children’s reach

Vapors
	Cannot be seen
	are heavier than air
	spread on the floor
	Can spread from other rooms to the main burner
by air currents
Do not install the appliance where flammable
products will be stored.
Read and follow boiler warnings and instructions
thoroughly. If owner’s manual is missing, contact
the retailer or manufacturer.
	This combination boiler must be installed by a
qualified plumber, a licensed gas fitter, and/or a
professional service technician.
	Improper installation and/or operation will cause a
potentially hazardous situation, such as serious injury
or death. Also, it will void the warranty.
• The National Fuel Gas Code NFPA 54 / ANSI Z224.1
• National Electric Code ANSI/NEPA 70
• All applicable local, state, national and provincial
codes, regulations and laws.
	Proper care is your responsibility. Carefully read and
understand the Operating Information in this manual
before operating the Boiler.
	Be aware of the location of the gas shut-off valve
and operation method. Close the gas shut-off valve
immediately if the appliance is subjected to fire,
overheating, flood, physical damage, or any other

	DO NOT use this Boiler if any part has been under
water. Immediately call a qualified technician for
inspecting the Boiler and replacing any part of the
control system and gas control which have been
under water.
	Do not power up the unit until the gas and water
supply valves are fully opened. Make sure that the
fresh air intake port and exhaust gas port are opened
and functional.
	DO NOT attempt to install, repair, or service this
Boiler by yourself.
Do not change any part of the Boiler.
	Contact a qualified technician if the Boiler needs
repair or maintenance.
Ask your gas supplier for a list of qualified service
providers.
	DO NOT use spray paint, hair spray, or any other
flammable spray near Boiler or near the exterior fresh
air inlet port. DO NOT place any items in or around
the exterior exhaust gas outlet port and/or fresh air
inlet port. These could restrict or block the flow in or
out of the vent system.
	“Caution: While repairing control, all wires are
labeled. You must connect the wires in accordance
with the instruction.
Wiring errors can cause improper and dangerous
operation.
“Verify proper operation after servicing operation”
	This consists of the gas ignition system components
which are protected from water (dripping, spraying, rain,
etc.) during operation and service (circulator replacement,
condensate trap, control replacement, etc.).
	After installing the heater, safety devices must be
tested.
	This boiler is equipped with a blocked vent shutoff
system.
If the error code ‘41’ occurs, follow the instructions
below.
- First, turn off the manual gas valve.
- Make sure that there is no foreign object in the vent
passage or rodent screen.
- If you do not find any problem, do the following.
- Turn off the error state by pressing the power button
of control panel.
- If the error occurs repeatedly, call your service
technician or gas supplier.

Page 14

SECTION 3.
Safety Regulations
3.2 Safety Precautions and Proper Use

When in Operation

Before Operation
1. Check the Gas Type (NG/LP)
When using or moving the unit for the first time, check
if gas type matches with the gas type of the Boiler.
Check whether the gas type which is supplied is NG
(Natural Gas) or LP (Propane) and also check the
Boiler gas type.
The gas type is indicated on the rating plate on side of
the Boiler.
2. Check the Power (120V 60Hz)
Check that the appliance is connected properly.
3. Check the Cold Water Inlet
valve
Please keep the
appliance water inlet
valve open at all times.
The appliance will not
ignite when insufficient
water or no water is
in the heating pipes.
(valve: always open
position)

open

4. Check the Gas Valve
Check that the manual gas shut-off valve
that supplies the FT is opened.
5. Check the area around the appliance and remove
any combustible or flammable materials. Remove
laundry or any other items that are on or near the
boiler or vent pipe.

CAUTION

1. Caution for Gas leak
Frequently check for a gas leak at the gas connection
portion with soapy water.
Steps to take if you have a Gas leak.
1.	Shut down the boiler as soon as gas fumes are
detected.
2. Close the intermediate gas valve.
3. Open windows for ventilation.
4. Call a qualified service technician for immediate
repair.
2. Caution for Ventilation
Make sure that there is sufficient inflow and outflow of air
ventilation while using the unit.
If the ventilation is improper, combustion quality may
deteriorate inside the appliance and cause shortened life
of the appliance.
3. Burn Warning
Be careful not to burn yourself on the flue or pipes. They
become extremely hot during operation.

Page 15

The FT Series Wall Mounted, Combination Boiler

WARNING
Do not use the appliance for any other purpose
than for heating and hot water.
Do not store combustibles or flammable material
such as gasoline near the appliance.
Do not store other items on or near this boiler.
Do not store combustible (flammable) materials
such as papers.
Do not hang clothes on the vent pipe. This may
start a fire.

Burn Protection

Be cautious when opening the
hot water tap. The water is very
hot. Especially, children or the
elderly whose skin is liable to
burn must not use the hot water
without help of a guardian.
 fter repair of gas pipeline or gas regulator
A
replacement, call A qualified contractor for inspection
before starting it up.

Carbon monoxide poisoning

If vent pipe fumes enter the room, it could cause
poisoning by carbon monoxide gas. Check that the
vent pipes are properly connected. Open windows
for ventilation. Call a qualified service technician for
immediate repair.

Gas leakage test.

Gas supply line must be inspected regularly.

Do not shut off the Boiler.

When you leave home for a long time, do not
shut off Boiler. The Boiler has a freeze protection
function. The ceramic heater is installed inside of
the heater’s internal pipe to protect the heater from
freezing.

Do not wipe the appliance or control panel
with wet cloth. Electric shock may occur, or

internal parts may fail due to the exposure to
moisture.

Do not disassemble the Boiler.

If repair is required, call your local qualified
technician.

Page 16

SECTION 4.
Installation

WARNING

4.1 Location and Clearances
The FT must be mounted to a suitable wall by a
qualified heating contractor under the guidelines of a
boiler. The wall may be of concrete or wood. Suitable
fasteners for concrete or wood must be used. Failure to
wall mount this boiler using correct fasteners will affect
the performance and life expectancy of the boiler and
will void the warranty.

18
46

3
8

24
61

Provide clearances
•	If the heater was installed in a narrow space
or corner, please ensure that there is sufficient
space for service and maintenance access. For
regular maintenance, gas and water lines must be
accessible.

12
30

Locating the Appliance.
Minimum clearances to Combustibles.

For Installation from
Non-Combustibles and
Combustibles
TOP of appliance

18 in
(46 cm)
5/8

Suggested
Service
Clearance
18 in
(46 cm)
5/8

BACK of appliance

in
(1.5 cm)

in
(1.5 cm)

FRONT of appliance

24 in
(61 cm)

40 in
(101 cm)

SIDE of appliance

3 in
(7 cm)

8 in
(20 cm)

BOTTOM of
appliance

12 in
(30 cm)

24 in
(61 cm)

Table 1.

Check before placing the Combination boiler
•	Always check the connected components which are
near to the heater. The components are below.
	Water piping position / Venting adapter / Gas supply
piping / Electrical power / Condensate drain hose.
•	Inspect area around Combination boiler. Remove
any combustible materials, gasoline and other
flammable liquids. Failure to keep Combination
boiler area clear and free of combustible materials,
gasoline and other flammable liquids and vapors can
result in severe personal injury, death or substantial
property damage.
•	The Combination boiler which has gas control
system components must be protected from any
possible danger during operation and service.
•	If new Combination boiler replaces an existing
appliance, check and correct system problems, for
example:
-	Do not install if: System leaks causing oxygen
corrosion or heat exchanger cracks from hard water
deposits.

3
8

Figure 3.

Installations must comply with
•	All the local, state, provincial, and national codes,
laws, regulations and ordinances.
•	National Fuel Gas Code, ANSI Z223.1 – The latest
version.
•	National Electrical Code.
•	A National Standard of Canada CAN/CSA-B149.1

Minimum Clearances
to Combustibles and for Service.

	The boiler must be installed on a wall that can bear its weight.

WARNING
CLEARANCES FOR SERVICE ACCESS
•	If you do not provide the minimum clearances
shown, it might not be possible to service the
boiler without removing it from the space.
•	Space must be provided with combustion /
ventilation air openings correctly sized for
all other appliances located in the same
space as the boiler. The boiler cover must be
securely fastened to prevent it from drawing
air from the boiler room. This is particularly
important if the boiler is in a room with other
appliances. Failure to comply with the above
warnings could result in substantial property
damage, severe personal injury, or death.

Page 17

The FT Series Wall Mounted, Combination Boiler

4.2 Wall Mount Bracket

3" to Top
of Unit

•	4.2.1 The installation height and location for your
FT depends on your installation scenario. With all clearances
considered, and given adequate positioning for air supply
and venting, you will need to determine the best position
to mount the Wall Mount Bracket. The wall must be
concrete, wood, or plywood over studs, and must be
strong enough to hold the boiler!

Anchors*
(4)
Concrete,
Wood,
or 5/8" Plywood

•	Start by familiarizing yourself to how the
Wall Mount
included Wall Mount Bracket hooks underneath
Bolts (4)
Bracket
the two Hangers that are attached to the back of
the boiler. The ‘hooks’ of the Wall Mount Bracket will
be 3” from the Top of the boiler once the boiler is hung.
•	Position the Wall Mount Bracket at the location that it will go,
being sure that it is level, and then drill 4 holes (0.47”dia)
with a 1/2” drill bit, into the wall through the Bracket.
•	If mounting to a concrete wall, then use the concrete anchors.
If onto wood or 5/8” (16 mm) plywood, then use the wood
screws. Do not hang the FT onto sheetrock unless it is
possible to fasten directly into
the structural studs. If the
included anchors do not suit
your installation, you must use
‘Field Supplied’ anchors that
are appropriate for the wall’s
construction.

Hangers (2)
(fastened to the back of unit)

4.2.2 Hang the Boiler
• Lift the boiler up, align the Hangers on the back
of the boiler with the hooks on the Wall Mount
Bracket, and hang the boiler onto the Wall Mount
Bracket. Do a visual inspection to make sure that
the boiler is hanging properly onto the hooks of
the Wall Mount Bracket.
• Fasten the bottom of the boiler to the wall using
2 suitable wall anchors (field supplied).

Wall Mount
Bracket

Page 18

SECTION 4.
Installation

(continued)

4.3 Combustion Air

FT boilers must have provisions for combustion
and ventilation air in accordance with the applicable
requirements for Combustion Air Supply and Ventilation
in the National Fuel Gas Code, ANSI Z223 1; or in
Canada, the Natural Gas and Propane Installation Code,
CSA B149.1. All applicable provisions of local building
codes must also be adhered to.
A FT unit can take combustion air from the space
in which it is installed, or the combustion air can be
ducted directly to the unit. Ventilation air must be
provided in either case.

4.3.1 Combustion Air from Room

In the United States, the most common requirements
specify that the space shall communicate with the
outdoors in accordance with method 1 or 2, which follow.
Where ducts are used, they shall be of the same crosssectional area as the free area of the openings to which
they connect.

Method 1: Two permanent openings, one commencing
within 12” (300mm) of the top and one commencing
within 12” (300mm) of the bottom, of the enclosure
shall be provided. The openings shall communicate
directly, or by ducts, with the outdoors or spaces
that freely communicate with the outdoors. When
directly communicating with the outdoors, or when
communicating to the outdoors through vertical ducts,
each opening shall have a minimum free area of 1
square inch per 4000 Btu/hr (550 square mm/kW) of
total input rating of all equipment in the enclosure. When
communicating to the outdoors through horizontal ducts,
each opening shall have a minimum free area of not
less than 1 square inch per 2000 Btu/hr (1100 square
mm/kW) of total input rating of all equipment in the
enclosure.

		

Other methods of introducing combustion and
ventilation air are acceptable, providing they conform to
the requirements in the applicable codes listed above.
In Canada, consult local building and safety codes or, in
absence of such requirements, follow CAN/CGA B149.1

4.3.2 Ducted Combustion Air

The combustion air can be taken through the wall, or
through the roof. When taken from the wall, it must be
taken from out-of-doors by means of the horizontal wall
terminal. When taken from the roof, a field-supplied rain
cap or an elbow arrangement must be used to prevent
entry of rain water.
Use ABS, PVC, CPVC, polypropylene, or galvanized
pipe for the combustion air intake. Route the intake
to the boiler as directly as possible. Seal all joints.
Provide adequate hangers. The unit must not support
the weight of the combustion air intake pipe. Maximum
linear pipe length allowed is shown in Table 6. Subtract
5 allowable linear ft. (1.5m) for every elbow used.
The connection for the intake air pipe is at the top of
the unit.
In addition to air needed for combustion, air shall also
be supplied for ventilation, including air required for
comfort and proper working conditions for personnel.

COMBUSTION AIR INSTALLATION STANDARDS

MATERIAL
ABS
PVC, sch 40
CPVC, sch 40
Polypropylene
Single wall galv. steel
Table 2.

Method 2: One permanent opening, commencing
within 12” (300mm) of the top of the enclosure, shall
be permitted. The opening shall directly communicate
with the outdoors or shall communicate through a
vertical or horizontal duct to the outdoors or spaces
that directly communicate with the outdoors and shall
have a minimum free area of 1 square inch per 3000
Btu/hr (734 square mm/kW) of the total input rating of
all equipment located in the enclosure. This opening
must not be less than the sum of the areas of all vent
connectors in the confined space.

UNITED STATES
ANSI/ASTM D1527
ANSI/ASTM D1785 or D2665
ANSI/ASTM F441
UL1738, ULC S636.
26 gauge

Required Combustion Air Pipe Material.

CANADA
Air pipe material must be chosen
CPVC, sch 40, ANSI/ASTM, Polypropylene
based upon the intended application of the boiler.

Page 19

The FT Series Wall Mounted, Combination Boiler

		

NOTICE

The instructions for the installation of the venting
system shall specify that the horizontal portions of
the venting system shall be supported to prevent
sagging; the methods of and intervals for support
shall be specified. These instructions shall also
specify that the venting system:
Category I, II and IV boilers must be installed so
that horizontal sections have a slope of at least ¼
inch per foot (21 mm/m) to prevent accumulation of
condensate; and
For Category II and IV boilers, where necessary,
have means provided for drainage of condensate.

CAUTION
The FT is standard as a Natural Gas Boiler and
must be converted if propane is the desired gas, unless
specifically manufactured for propane.
Adequate drainage
•	The appliance should be installed not to damage
the adjacent area. If such locations cannot be
avoided, it is recommended that a suitable drain
pan, adequately drained, be installed under the
appliance. The pan must not block combustion air
flow.
Connecting the Water Supply
•	To conserve water and energy, insulate all water
piping—especially the hot and recirculation water
lines. Never cover the drain or pressure relief valve.
		Having a backflow preventer in the cold water
supply line will prevent thermal expansion
backflow. Contact the water supplier or local
plumbing inspector for information about how to
control this situation.
Ifoverheating occurs or the gas supply fails to shut
off, turn off the manual gas valve.
This installation must conform with below section
•	“Air for Combustion and Ventilation” of the
National Fuel Gas Code, ANSI Z224.1/NFPA 54,
or Sections 8.2, 8.3 or 8.4 of Natural Gas and
Propane Installation Code, CAN/CSA B149.1, or
applicable provisions of the local building codes.

		

AVIS

Les instructions d'installation du système
d'évacuation doivent préciser que les sections
horizontales doivent être supportées pour prévenir
le fléchissement. Les méthodes et les intervalles
de support doivent être spécifiés. Les instructions
doivent aussi indiquer les renseignements suivants:
les chaudières de catégories I, II et IV doivent
présenter des tronçons horizontaux dont la pente
montante est d'au moins ¼ po par pied (21 mm/m)
entre la chaudière et l'évent; les chaudières de
catégories II et IV doivent être installées de façon à
empêcher l'accumulation de condensat;
et si nécessaire, les chaudières de catégories II et IV
doivent être pourvues de dispositifs d'évacuation du
condensat.

Page 20

4.4 Venting (Exhaust)
		

WARNING

NOTICE

DO NOT COMMON VENT FT UNITS.FT units are
never permitted to share a vent with Category I
appliances.

AVIS

		

NE PAS ÉVENT COMMUNE FT UNITÉS. FT
unités ne sont jamais autorisés à partager un
évent Catégorie I avec les appareils.

The flue temperature of the FT changes
dramatically with changes in operating water
temperature. Therefore, it is necessary to assess
the application of the boiler to determine the
required certified vent class. If the FT is installed
in an application where the ambient temperature
is elevated, and/or installed in a closet/alcove,
CPVC, polypropylene, or stainless steel material is
required. If the system temperatures are unknown
at the time of installation, stainless, polypropylene
or CPVC material is recommended.
The FT is a Category IV appliance and may be
installed with PVC, CPVC or polypropylene that
complies with ULC-S636, ANSI/ASTM D1785 F441
(see Table 3) or a stainless steel venting system that
complies with UL 1738 Standard and ULC S636.

WARNING
Use of cellular core PVC (ASTM F891), cellular core
CPVC, or Radel® (polyphenolsulfone) in venting
systems shall be prohibited.

WARNING
Failure to use the appropriate vent material,
installation techniques, glues/sealants could lead to
vent failure causing property damage, personal injury
or death.

				
MATERIAL
Stainless Steel
PVC, sch 40
CPVC, sch 40
Polypropylene
Table 3.

All venting must be installed according to this manual
and any other applicable local codes, including but
not limited to, ANSI Z224.1/NFPA 54, CAN/CSA
B149.1 and ULC-S636. Failure to follow this manual
and applicable codes may lead to property damage,
severe injury, or death.

WARNING
Use of cellular core PVC (ASTM F891), cellular core
CPVC, or Radel® (polyphenolsulfone) in non-metallic
venting systems is prohibited and that covering nonmetallic vent pipe and fittings with thermal insulation is
prohibited.

INSTALLATIONS IN CANADA require the use of
venting material certified to ULCS636. All Gas
vents connected to the FT, plastic, stainless
steel or otherwise must be certified to this ULC
standard. Appropriate selection of vent material is
very important for proper performance and safe
operation of the FT.
The flue temperature of the FT changes dramatically
with changes in operating water temperature.
Therefore, it is necessary to assess the application
of the boiler to determine the required certified
vent class. If the FT is installed in an application
where the outlet water temperature exceeds 145°F,
and/or installed in a closet, class IIB or higher vent
material is required. If the system temperatures
are unknown at the time of installation, class IIB or
higher venting material is recommended.
IN CANADA all venting used must meet the
following requirements:
1.

ULC-S636 certified and marked

2.

The first 3 feet of venting must be accessible
for visual inspection.

3.

All components used in the vent system must
be from a certified manufacturer.

VENTING INSTALLATION STANDARDS
UNITED STATES
UL 1738
ANSI/ASTM D1785
ANSI/ASTM F441
UL1738 or ULC-S636

Required Exhaust Vent Material.

CANADA
Venting must be ULC-S636 certified for use as
venting material. The venting material must be chosen
based upon the intended application of the boiler.

Page 21

The FT Series Wall Mounted, Combination Boiler

4 . Vent system components must not be mixed
with alternate manufacturers certified
components and/or unlisted components.
5 . The venting must be installed according
to the vent manufacturers installation
instructions.
The unit’s vent can terminate through the roof, or
through an outside wall.
Vent pipe must pitch upward, toward the vent
terminal, not less than 1/4” per foot, so that
condensate will run back to the FT to drain. Route
vent pipe to the heater as directly as possible. Seal
all joints and provide adequate hangers as required
in the venting system manufacturer’s Installation
Instructions. Horizontal portions of the venting
system must be supported to prevent sagging and
may not have any low sections that could trap
condensate. The unit must not support the weight of
the vent pipe.

WARNING
	Failure to vent this Boiler in accordance with
these instructions could cause a fire, resulting
in severe property damage, personal injury or
death.
	Do not interchange vent systems or materials
unless it is specified.
	The use of thermal insulation covering pipe and
fittings is prohibited.
	Do not apply an electric damper, draft hood or
vent damper with this Boiler.
	Do not locate vent termination where exposed
to prevailing winds. Moisture and ice may fall
on surface around vent termination. To prevent
deterioration, surface must be in good repair
(sealed, painted, etc.).

4.5 General Location Guideline
1.	Vent system installation must be in accordance
with Local codes or, in the absence of local codes,
the National Fuel Gas Code, ANSI Z224.1 /NFPA
54 and/or CSA B149.1, Natural Gas and Propane
Installation Code.
2.	The Boiler is designed to be installed as a Direct
Vent (sealed combustion) type. The air for
combustion must be supplied directly from the
outside to the burner. Also, the flue gases must be
vented directly to the outdoors (through wall or roof).
3.	Do not install venting system components on the
exterior of building except as specifically required by
these instructions
-	Vent terminals must be at least 1 foot from any door,
window, or gravity inlet into the building.
-	Maintain the correct clearance and orientation
between the vent and air intake terminals.
		The vent and air intake terminals must be at the
same height and their center lines must be spaced
apart 12˝ minimum.
-	The bottom of the vent and air intake terminal must
be at least 12˝ above the normal snow line. In no
case should they be less than 12˝ above grade
level.

-	Do not install the vent terminal directly over
windows or doors.
-	Air intake terminal must not terminate in areas that
might contain combustion air contaminates, such
as near swimming pools.
-	For sidewall venting, the minimum horizontal
distance between any adjacent individual Module
(Boiler) vent terminations is twelve (12) inches. It
is better to be far more than 12 inches for avoiding
frost damage to building surfaces where vent
terminations are placed.
-	The minimum horizontal distance between any
adjacent individual module (boiler) roof vent
endpiece is one (1) foot.

Page 22

4.6   Locations for Vent Pipe Terminator

*	For clearances not specified in ANSI Z224.1 / NFPA 54 or CAN/CSA-B 149.1, please use clearances in
accordance with local installation codes and the requirement of the gas supplier.

4.6.1  Direct Venting Clearances
Description

US Direct Vent Instal- Canadian Direct Vent
lations
Installations

A

Clearance above grade, veranda, porch, deck, or balcony

12 in (30 cm)

12 in (30 cm)

B

Clearance to window or door that may be opening

12 in (30 cm)

36 in (91 cm)

C

Clearance to permanently closed window

*

*

D

Vertical clearance to ventilated soffit located above the terminal
within
a horizontal distance of 2 feet from the center line of the terminal

*

*

E

Clearance to unventilated soffit

*

*

F

Clearance to outside corner

*

*

G

Clearance to inside corner

*

*

H

Clearance to each side of center line extended above meter/
regulator assembly

*

3 ft (91 cm) within a
height 15 ft (457 cm)
above the meter/
regulator assembly

I

Clearance to service regulator vent outlet

*

3 ft (91 cm)

J

Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance

12 in (30 cm)

36 in (91 cm)

K

Clearance to a mechanical air supply inlet

3 ft (91 cm) above if
within 10 ft (3 m) horizontally

6 ft (1.83 m)

L

Clearance above paved sidewalk or paved driveway located on
public property

*

7 ft (2.13 m)

M

Clearance under veranda, porch, deck, or balcony

*

12 in (30 cm)

Table 4.

Direct Vent Clearances

Page 23

The FT Series Wall Mounted, Combination Boiler

4.6.2 Non-Direct Venting (Single Pipe) Clearances
Description
A

US Non-Direct

Canadian Non-Direct

Clearance above grade, veranda, porch, deck, or balcony

12 in (30 cm)

12 in (30 cm)

B

Clearance to window or door that may be opening

48 in (120 cm) below
or to side of opening;
12 in (30 cm) above
opening

36 in (91 cm)

C

Clearance to permanently closed window

*

*

D

Vertical clearance to ventilated soffit located above the terminal
within a horizontal distance of 2 feet from the center line of the
terminal

*

*

E

Clearance to unventilated soffit

*

*

F

Clearance to outside corner

*

*

G

Clearance to inside corner

*

*

H

Clearance to each side of center line extended above meter/
regulator assembly

*

36 in (91 cm) within a
height 15 ft (4.57 m)
above the meter/ regulator assembly

I

Clearance to service regulator vent outlet

*

36 in (91 cm)

J

Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance

48 in (120 cm) below
or to side of opening;
12 in (30 cm) above
opening

36 in (91 cm)

K

Clearance to a mechanical air supply inlet

36 in (91 cm) above
if within 10 ft (3 m)
horizontally

6 ft (1.83 m)

L

Clearance above paved sidewalk or paved driveway located on
public property

*

7 ft (2.13 m)

M

Clearance under veranda, porch, deck, or balcony

*

12 in (30 cm)

Table 5.

Non-Direct Vent Clearances

Page 24

4.6.3  Venting Requirements in the
Commonwealth of Massachusetts
In Massachusetts the following items are required if
the side-wall exhaust vent termination is less than
seven (7) feet above finished grade in the area
of the venting, including but not limited to decks
and porches. From Massachusetts Rules and
regulations 248 CMR 5.08
1.

Installation of Carbon Monoxide Detectors

At the time of installation of the side wall
vented gas fueled appliance, the installing plumber
or gasfitter shall observe that a hard-wired carbon
monoxide detector with an alarm battery back-up is
installed on the floor level where the gas appliance
is to be installed. In addition, the installing plumber
or gasfitter shall observe that a battery operated or
hard-wired carbon monoxide detector with an alarm
is installed on each additional level of the dwelling,
building or structure served by the side-wall
horizontally vented gas fueled equipment. It shall
be the responsibility of the property owner to secure
the services of qualified licensed professionals
for installation of hard-wired carbon monoxide
detectors.
a. In the event that the side-wall horizontally
vented gas fueled equipment is installed in a crawl
space or an attic, the hard-wired carbon monoxide
with alarm and battery back-up may be installed on
the next adjacent floor level.

b. In the event that the requirements of the
subdivision cannot be met at the time of completion
of installation, the owner shall have a period of thirty
(30) days to comply with the above requirements,
provided, however, that during said thirty (30) day
period, a battery operated carbon monoxide detector
with an alarm be installed.
2.

Approved Carbon Monoxide Detectors

Each carbon monoxide detector shall comply
with NFPA 720 and be ANSI/UL 2034 listed and IAS
certified.
3. Signage. A metal or plastic identification plate
shall be permanently mounted to the exterior of
the building at a minimum height of eight (8) feet
above grade directly in line with the exhaust vent
terminal for horizontally vented gas fueled heating
appliance or equipment. The sign shall read, in
print no less than one-half (1/2) inch in size: “GAS
VENT DIRECTLY BELOW, KEEP CLEAR OF ALL
OBSTRUCTIONS”.
4. Inspection The state or local gas inspector of
the side-wall horizontally vented gas fueled appliance
shall not approve the installation unless, upon
inspection, the inspector observes carbon monoxide
detectors and signage installed in accordance with the
provisions of 248 CMR 5.08(2)(a) 1-4.

Page 25

The FT Series Wall Mounted, Combination Boiler

		

NOTICE

DO NOT COMMON VENT FT UNITS.FT units are
never permitted to share a vent with Category I
appliances.

		

AVIS

NE PAS ÉVENT COMMUNE FT UNITÉS. FT unités
ne sont jamais autorisés à partager un évent
Catégorie I avec les appareils.

Common Vent Test
NOTE: This section does not describe a method for
common venting FT units. It describes what must
be done when an existing unit is removed from a
common vent system.

		

NOTICE

At the time of removal of an existing boiler, the following steps
shall be followed with each appliance remaining connected to
the common venting system placed in operation, while the other
appliances remaining connected to the common venting system
are not in operation.
1. Seal any Not Used openings in the common venting system.
2. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion and other deficiencies which
could cause an unsafe condition.
3. Insofar as is practical, close all building doors and windows
and all doors between the space in which the appliances
remaining connected to the common venting system are
located and other spaces of the building. Turn on clothes
dryers and any appliance not connected to the common
venting system. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they will operate at
maximum speed.
4. Place in operation the appliance being inspected. Follow the
lighting instructions. Adjust thermostat so the appliance will
operate continuously.
5. Operate the main burner for 5 minutes then, determine if the
cut-draw overflows to the discharge opening. Use the flame
of a match or a candle or the smoke of a cigarette, a cigar or
a pipe
6. Once it has been determined, according to the method
indicated above, that each device connected to the drainage
system is placed in the open air in an adequate manner.
Install the doors and windows, fans, the registers of chimneys
and gas appliances to their original position
7. Any malfunction of the venting system should be corrected so
that the installation conforms to the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 and (or) the installation codes CAN/
CSA-B149.1. If the size of a section of the evacuation system
must be changed, the system should be modified to comply
with the minimum values of the relevant tables of appendix F
of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and
(or) the installation codes CAN/CSA-B149.1

		

AVIS

Au moment du retrait d'une chaudière existante, les mesures
suivantes doivent être prises pour chaque appareil toujours raccordé
au système d'évacuation commun et qui fonctionne alors que
d'autres appareils toujours raccordés au système d'évacuation ne
fonctionnent pas:
1. Sceller toutes les ouvertures non utilisées du système
d'évacuation.
2. Inspecter de façon visuelle le système d'évacuation pour
déterminer la grosseur et l'inclinaison horizontale qui conviennent
et s'assurer que le système est exempt d'obstruction,
d'étranglement, de fuite, de corrosion et autres défaillances qui
pourraient présenter des risques.
3. Dans la mesure du possible, fermer toutes les portes et les
fenêtres du bâtiment et toutes les portes entre l'espace où les
appareils toujours raccordés au système d'évacuation sont
installés et les autres espaces du bâtiment. Mettre en marche
les sécheuses, tous les appareils non raccordés au système
d'évacuation commun et tous les ventilateurs d'extraction comme
les hottes de cuisinière et les ventilateurs des salles de bain.
S'assurer que ces ventilateurs fonctionnent à la vitesse maximale.
Ne pas faire fonctionner les ventilateurs d'été. Fermer les registres
des cheminées.
4. Mettre l'appareil inspecté en marche. Suivre les instructions
d'allumage. Régler le thermostat de façon que l'appareil fonctionne
de façon continue.
5. Faire fonctionner le brûleur principal pendant 5 min ensuite,
déterminer si le coupe-tirage déborde à l'ouverture de décharge.
Utiliser la flamme d'une allumette ou d'une chandelle ou la fumée
d'une cigarette, d'un cigare ou d'une pipe.
6. Une fois qu'il a été déterminé, selon la méthode indiquée cidessus, que chaque appareil raccordé au système d'évacuation
est mis à l'air libre de façon adéquate. Remettre les portes et
les fenêtres, les ventilateurs, les registres de cheminées et les
appareils au gaz à leur position originale.
7. Tout mauvais fonctionnement du système d'évacuation commun
devrait être corrigé de façon que l'installation soit conforme au
National Fuel Gas Code, ANSI Z223.1/NFPA 54 et (ou) aux codes
d'installation CAN/CSA-B149.1. Si la grosseur d'une section
du système d'évacuation doit être modifiée, le système devrait
être modifié pour respecter les valeurs minimales des tableaux
pertinents de l'appendice F du National Fuel Gas Code, ANSI
Z223.1/NFPA 54 et (ou) les codes d'installation CAN/CSA-B149.1

Page 26

4.7 Air Supply and Vent Connections at the Appliance
4.7.1 Vent / Air Pipe Lengths
Combination Boiler Model
FTCW140/199
Table 6.

3˝ Combustion Air / Vent Pipe

2˝ Combustion Air / Vent Pipe

Max

Elbow Max

Max

100´ (30M)

6

50´ (15M )

*

Elbow Max

*

4

Maximum Vent / Air Pipe Lengths for either 3” or 2 “ Pipes

*Propane models are limited to 25 equivalent feet of 2” vent
NOTE : For
 additional elbows, reduce maximum allowable length
• 5 feet (1.5M) for each additional 3-inch 90-degree elbow
• 2.5 feet (0.75M) for each additional 3-inch 45-degree elbow
• 8 feet (2.4M) for each additional 2-inch 90-degree elbow
• 4 feet (1.2M) for each additional 2-inch 45-degree elbow
• The thickness of the wall vents installed : Min 4˝ ~ Max 20˝
NOTE: W
 hen using a 2” vent pipe, DIP Switch 4 must be in the OFF position.
For 3” Pipe vent, the default setting for DIP 4 is ON.
Refer to Section 4.19

4.7.2 Direct Venting

3” pipe

The boiler uses 3˝ or 2˝ diameter exhaust and 3˝
or 2˝diameter intake air ducts. To ensure the draw
of air directly from and exhaust of air directly to the
outside of the building, create an airtight seal from
the boiler collar to the vent termination.
(For installations in Canada) field-supplied plastic
vent piping must comply with CAN/CSA B149.1
(latest edition) and be certified by the Standard
For Type BH Gas Venting Systems, ULC-S636.
Components of this listed system must not be
interchanged with other vent systems or unlisted
pipes or fittings. All plastic components and
specified primers and glues of the certified vent
system must be from a single system manufacturer
and must not be intermixed with another system
manufacturer’s parts.
	Tightening — Boiler Collar (Socket) to Vent
Pipe & Inlet Pipe
-	Clean and dry your selected PVC, CPVC vent
pipe and boiler collar (socket).
-	You can select to the size of vent pipe(2˝ & 3˝),
according to the installation conditions.
-	Push the pipe into the collar (socket) until it
touches the bottom of the socket fitting.
-	For 2” installations, install a field supplied 3” to
2” adaptor. Adaptor must be installed in vertical
section of piping only.

2” pipe connected, using an adapter
3” to 2”
adapter
is NOT
included.

Page 27

The FT Series Wall Mounted, Combination Boiler
4.7.3 Indoor Combustion Air
Read and Follow Sections 4.3 Guidelines First.
1. Insert the termination end cap into the intake air duct.
2. P
 rovide two openings to allow for circulation of
combustion air as specified by ANSI Z224.1/NFPA 54.
In Canada refer to CAN/CSA B-149.1

Model

FTCW140

FTCW199

Maximum Input (BTU/H)

140,000

199,000

Indoor make up air is provided, a minimum
free area of 1 in 2 per 1,000 BTU/H

140 in2 13 1/4"
(W) x 13 1/4" (H)

199 in2 13 1/4"
(W) x 13 1/4" (H)

NOTE: The FT needs fresh air for safe operation and
must be installed so there are provisions for
adequate combustion and ventilation air.

Page 28

4.8 Vent / Air Pipe Termination
Note : For using pipe more than 1 elbow,
reduce maximum allowable length
• 5 feet (1.5M) for each additional 3-inch
90-degree elbow
• 2.5 feet (0.75M) for each additional 3-inch
45-degree elbow
• 8 feet (2.4M) for each additional 2-inch
90-degree elbow
• 4 feet (1.2M) for each additional 2-inch
45-degree elbow
• The thickness of the wall vents installed : Min
4˝ ~ Max 20˝

Horizontal Vent Termination

• Direct Vent - Sidewall Terminations

Horizontal Vent Termination (cont)
•	Direct Vent - Optional Sidewall
Snorkel Terminations

Vent Termination
1. Rodent Screen Installation
		 • Install Rodent Screen and Vent Terminal
(additional purchase), see Figure for appropriate
configuration.
		 • After connecting vent/air inlet terminal, it is
required to install screen for the terminal to
prevent incoming of rodent, which might cause
damage to the unit. (Extra purchase accessory
2/3˝ screen vent 1/4˝ mesh)

Page 29

The FT Series Wall Mounted, Combination Boiler
4.8 Vent Pipe Termination (cont)

Vertical Vent Termination

• Direct Vent - Vertical Terminations
with Sloped Roof

Concentric Vent Termination

•	Direct Vent - Optional Horizontal
and Vertical Concentric Vent
Side wall Vent
(2"or 3")
Roof Vent
(2"or 3")

Side wall Vent
(2"or 3")

Page 30

4.9 Gas Supply and Piping
Gas piping should be supported by suitable hangers or
floor stands, not the appliance.
Review the following instructions before proceeding with
the installation.
1.	Verify that the appliance is fitted for the proper type
of gas by checking the rating plate. FT will function
properly at elevations up to 10,000 feet
(3050 m). Refer to Section 4.12 for High Altitude
Settings.
2.	The maximum inlet gas pressure must not exceed
13" W.C. (3.2kPa). The minimum inlet gas pressure
is 3.5" W.C. (1.0kPa).

WARNING:

Open flame can cause gas to ignite and result in
property damage, severe injury, or loss of life.
NOTE: The FT appliance and all other gas appliances
sharing the gas supply line must be firing at maximum
capacity to properly measure the inlet supply pressure.
The pressure can be measured at the supply pressure
port on the gas valve. Low gas pressure could be an
indication of an undersized gas meter, undersized gas
supply lines and/or an obstructed gas supply line.

3.	Refer to Table 8, Table 7 and Table 9 to size piping.
4.	Run gas supply line in accordance with all
applicable codes.
5.	Locate and install manual shutoff valves in
accordance with state and local requirements.
6.	A sediment trap must be provided upstream of the
gas controls.
7.	All threaded joints should be coated with piping
compound resistant to action of liquefied petroleum
gas.
8.	The appliance and its individual shutoff valve
must be disconnected from the gas supply piping
during any pressure testing of that system at test
pressures in excess of 1/2 PSIG (3.45kPa).
9.	The unit must be isolated from the gas supply
system by closing its individual manual shutoff valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2
PSIG (3.45kPa).
10.	The appliance and its gas connection must be leak
tested before placing it in operation.
11. Purge all air from gas lines.

CAUTION

PRV (included) must be installed immediately at the
top of boiler outlet to PRV, with no valves between.
Refer to Section 4.15
__________________________________________

ATTENTION

PRV (inclus) doit être installé immédiatement en haut
de la chaudière sortie de PRV, sans les vannes entre.
Se reporter à la Section 4.15
__________________________________________

SCHED 40 METAL PIPE CAPACITY FOR 1.50 SPECIFIC GRAVITY
UNDILUTED PROPANE

NOMINAL PIPE SIZE @ 11" W.C. INLET AND 0.5" W.C. PRESSURE DROP
SIZE
LENGTH
HOUR

1/2"

3/4"

1"

MAXIMUM CAPACITY IN THOUSANDS OF BTU PER

20

200

418

787

40

137

287

541

60

-

231

434

80

-

197

372

100

-

175

330

NOTES: 1. Follow all local and national propane gas codes for line sizing and
equipment requirements. 2. Verify that inlet gas pressure remains between
4 and 13 inches of water column before and during operation.
Source: ANSI Z223.1-80 National Fuel Gas Code.

Table 7.

Nominal Pipe Size, Propane

SCH 40 METAL PIPE CAPACITY FOR 0.60 SPECIFIC GRAVITY NATURAL GAS

NOMINAL PIPE SIZE @ 0.30" W.C. PRESSURE DROP
LENGTH
FT

20

3/4"

1"

CUBIC FEET OF GAS PER HOUR

190

350

40

130

245

60

105

195

80

90

170

100		

Table 8.

Nominal Pipe Size, Natural Gas

EQUIVALENT LENGTHS OF STRAIGHT PIPE FOR TYPICAL SCH 40 FITTINGS

NOMINAL PIPE SIZE
FITTING
90° ELBOW
TEE

Table 9.

1/2"

3/4"

1"

3.6

4.4

5.2

4.2

5.3

6.6

LINEAR FEET

Equivalent Pipe Lengths

Page 31

The FT Series Wall Mounted, Combination Boiler

4.9 Gas Supply and Piping (cont)
 he gas connection fitting is,
T
3/4” female NPT on FTCW140 models
3/4” female NPT on FTCW199 models
 he supply line must be sized for the maximum
T
output of the combination boiler model being
installed. If there are additional gas appliances
from the main supply line, you must measure
sizes of the supply line according to the
COMBINED total maximum BTUH draw for the
appliances as if they were all operating at the
same time.
Measure the length of the gas supply line from
the gas meter to the Combination boiler.
Use the tables in this manual or refer to the gas
line manufacturers sizing information to determine
the correct supply pipe size.

 he gas shut-off valve in the gas supply line should
T
be installed close to the unit.
To facilitate any future maintenance, it is also
recommended that an approved gas union fitting
be installed in the supply line between the shut-off
valve and the 3/4˝ female NPT connection on the
Combination boiler.
1)	Install an approved gas line pipe to gas line
connection under the Combination boiler.
Include manual shut off valve and gas union
connection, as shown.
2)	Test gas pressure to make sure it meets the
minimum standards and does not exceed
the maximum standards for the combination
boiler.
3)	Leak test the gas line pipe before placing the
unit in operation. Use approved leak detector
liquid solutions only to check for leaks.
Do Not Operate the combination boiler until all
connections have been completed, checked for
leaks, and the heat exchanger is filled with water.

UNION FITTING

CLOSED POSTION

Gas Line Valve Detail

MANUAL SHUT OFF VALVE

GAS PIPE

Page 32

SECTION 4. Installation

4.9 Gas Supply and Piping (cont)

Suggested Natural Gas (NG) Layout

Suggested Propane Gas (LP) Layout

The combination boiler must be installed downstream of the gas meter for adequate gas supply.
 he gas piping must not be less than 1/2” for FTCW140 models and 3/4” female NPT on FTCW199 modT
els.

Page 33

The FT Series Wall Mounted, Combination Boiler

SECTION 4. Installation
4.10 Gas Supply Pressure
Refer to the illustration.

Offset Adjustment.

Do Not Adjust without using a combustion analyzer
to verify adjustment. Adjust ONLY when in MIN
Fire and when using a combustion analyzer.
See Section 4.13 for step by step details.

Gas Outlet Pressure Port
Inlet Gas Pressure Port
FTCW140
FTCW199

Gas Outlet Pressure Port
Inlet Gas Pressure Port

Offset Adjustment.

Do Not Adjust without using a combustion
analyzer to verify adjustment. Adjust
ONLY when in MIN Fire and when using a
combustion analyzer.
See Section 4.13 for step by step details.

LP Gas
	The Maximum and Minimum
gas line pressures must be

Natural Gas

Maximum Pressure

13.0" WC

Maximum Pressure 10.5" WC

Minimum Pressure

8.0" WC

Minimum Pressure

3.5" WC

CAUTION
	 The appliance and its individual shut-off valve must be disconnected from the gas supply piping system during any
pressure testing of the system at test pressures in excess of 1/2 psi (3.5 kPa).
	 The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve
during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).
	Loosen the pressure port bolts before you check the gas inlet pressure.

Page 34

SECTION 4. Installation
4.11 Gas Setup and Adjustment
For the Step by step process to measure CO2 values on the FT Section 4.13 of this
Installation Manual.

 Combi, Gas Conversion Kit
The FT
Series, Wall
WARNING

Document 4288D

Standard Factory Setting is for MAX Fire. 9.0%
CO2 @ 0-2,000 ft altitude (Natural Gas).

Installer is required to verify combustion settings as part of
theNOTE:
installation
process.
Installer
is required to verify combustion settings as part of the installation process.
CO should not exceed 200 ppm.
Natural Gas (NG)

CO2 value

FTCW (ALL Sizes)

2˝ VENT

3˝ VENT

Propane Gas (LP)

2˝ VENT

3˝ VENT

MAX FIRE

8.5 - 10.5%

9.5 - 11%

MIN FIRE

8 - 10%

9 - 10.5 %

‘NG’ type combustibility

‘LP’ type combustibility

2"/3" VENT

2"/3" VENT

MAX FIRE

-0.216" WC

-0.216" WC

MIN FIRE

0.002" WC

0.079" WC

MAX FIRE

-0.314"WC

-0.173"WC

MIN FIRE

-0.015"WC

-0.015"WC

Table 10.
C CO2 Values
Table

Manifold pressure
FTCW140
FTCW199

Table11.
D Manifold Pressures
Table

21.

It may be necessary to go back and forth between HI Fire and LOW Fire several times (and making
adjustments only at LOW Fire), before CO2 at both are within acceptable levels. Be sure to put the
adjustment port cap screw back onto the valve when done.

22.

Once the CO2 and manifold pressure measurements for both MIN and MAX Fire are acceptable per
Table C, set DIP switches 6 and 7 to the OFF position for Nominal Fire (normal operation).

23. Write in the correct Conversion Date and the Technicians Name to the included gas conversion
sticker. See Figure F. Then apply that sticker adjacent to the rating plate.

24. Remove your combustion analyser from the Test Port and be sure to thread the Test Port plug back
into position.

25. Re-connect outdoor reset if it was disconnected, put the boiler cover back on and assemble/tighten

73800D

the 4 screws that hold the cover in place.
This unit was converted on ____/____/___to _____gas
with kit #____________by______________________
(name and company __________________________
accountable)_________________________________
___________________________________________
Cette unité a été converti ____/____/____ten ______gaz
en utilisant le kit numéro _____
par______________
(nom et société_________________________________

Figure F (Conversion label)

The FT Series Wall Mounted, Combination Boiler

4.12 High Altitude Installations. 2,000’ to 10,000’
The FT is shipped with a default factory setting for installation at an
altitude of 0 to 2000’ (approx). For maximum efficiencies at higher
altitudes (2,000’ to 10,000’), the FT does have an adjustment in the
Installer Parameters Mode.
Follow these instructions if your installation is at 2,000’ - 10,000’.

1. With the Power

turned OFF, press the 'Modes

for 5 seconds to get into the Installer
button'
Parameters Mode.
2. Turn the dial (E) until ‘28:HA’ appears.
3. Press the dial (E).
4. Set the high altitude value by turning the dial.
Refer to table.
#

Altitude of Installation

0

0~1999 ft (0~609 m)

1

2,000~4,499 ft (610~1,645 m)

2

4,500~7,699 ft (1,646~2,346 m)

4

7,700~10,000 ft (2,347~3,048 m)

5. Press the dial again (E) to save the setting.
for one second, to
6. Press the ‘Modes button’
Save the number and to go back to initial status.

Page 35

Page 36

SECTION
4. Installation
The FT Series,
Wall Combi, Gas Conversion Kit
4.13 Natural Gas to Propane Conversion

Kit Document #4288

Document 4288D

Kit # R20770
The FT Series, wall combi, condensing boiler is
configured for Natural Gas (NG) from the factory.
A Natural Gas to Propane Conversion Kit is included
with every FT. The gas conversion kit will show you
how to convert your FT boiler to propane gas. If your
FT does not have the bag containing the conversion
kit, a replacement kit can be obtained. Contact the
manufacturer and request a replacement conversion kit.

ON / OFF

NOTICE
If your installation altitude is greater than 2000 ft, check
that the ‘High Altitude’ Installer Setting has been adjusted
to suit your installation altitude. Refer to Section 4.12 of the
Installation and Operation Instructions (Document 1318).

WARNING
This gas conversion kit shall be installed by a qualified
service agency in accordance with the manufacturer’s
instructions and all applicable codes and requirements of
the authority having jurisdiction. The information in these
instructions must be followed to minimize the risk of fire or
explosion or to prevent property damage, personal injury
or death. The qualified service agency is responsible for
the proper installation of this kit. The installation is not
proper and complete until the operation of the converted
appliance is checked as specified in the manufacturer’s
instructions supplied with the kit.Installation must conform
to local codes and the latest edition of the National Fuel
Gas Code, ANSI Z223.1 and CAN-B149.1. Failure to
follow instructions could result in serious injury or property
damage. The qualified agency performing this work
assumes responsibility for gas conversion.

This combination boiler has already been set to burn natural
gas, but can be converted to burn LP gas. Before placing the
combination boiler into operation, verify that the type of gas
supplied to your combination boiler.

Model

the bottom left of the Control Display.

Turn OFF the GAS and WATER supply to the FT (valves

3.

Using a Phillips screwdriver, remove the 4 screws on the

4.

Locate the Gas Inlet Pipe at the top left of the unit as

5.

6.

8.

Natural Gas (NG) part #

are located on the plumbing pipes.)
front cover. See Figure A.
shown in Figure A, and loosen the Brass Fittings at both
ends of the Gas Inlet Pipe.
Completely unthread the brass fitting on the blower end of
the Gas Inlet Pipe and then carefully swing the Gas Inlet
Pipe to the left or right, just enough so that it is out of the
way. See Figure B.
Remove the existing natural gas nozzle or orifice. If your
unit is a 199, note that the flat side of the orifice is towards
the blower. Save the packing for re-use. See Figure C.
Install the new LP (propane) nozzle or orifice. Re-use the
packing from previous.
Return the Gas Inlet Pipe to its original position and tighten
both of the brass fittings.

Propane Gas (LP) part #
Nozzle

FTCW140

FT1412N

FT1412P

FTCW199

FT1780

FT1802

Table A.

is located at

2.

7.

CAUTION

H2373800D

Steps 1 thru 25
1. Turn OFF the FT. The ON / OFF button

Orifice

Gas Conversion Parts

800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering)
pg 1 of 4
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130

www.Laars.com

Page 37

The FT Series Wall Mounted, Combination Boiler

SECTION 4. Installation

TheNatural
FT Series,
Combi,
Gas Conversion Kit
4.13
Gas Wall
to Propane
Conversion

Figure A

Document 4288D

Figure B

Gas Valve
Combustion
Test Port

Figure C

FTCW140

Gas Valve

FTCW199

Figure B
Gas Valve

Figure C

ORIFICE
PACKING

WARNING

AVERTISSEMENT

This conversion shall be installed by a qualified
Ce conversion doit être installé par un organisme de
service agency in accordance with the manufacturer's
service conformément aux instructions du fabricant
instructions and all applicable codes and requirements
et tous les codes et les exigences de l’autorité
of the authority having jurisdiction. If the information
compétente. Si les informations contenues dans ces
in these instructions is not followed exactly, a fire,
instructions n’est pas suivi à la lettre, un incendie,
an explosion or production of carbon
une explosion ou de la production de monoxyde
monoxide may result causing property
de carbone mais résultat causant des dommages
damage, personal injury or loss of
matériels, des blessures ou des pertes de vie. Le
life. The qualified service agency is
service est responsable pour la bonne et complète
responsible for the proper and complete
l’installation de ce kit. L’installation n’est pas correcte
installation of this kit. The installation is
et complète jusqu’à ce que le fonctionnement de
not proper and complete until the operation
of the
l’appareil (Customer
converti est
vérifiService
ée comme
spécifié dans
800.900.9276 • Fax 800.559.1583
Service,
Advisors)
converted appliance is checked
as specified in the
manuel d’instruction
fourni avec
le kit. Engineering)
20 Industrial Way, Rochester, NH 03867le• 603.335.6300
• Fax 603.335.3355
(Applications
manufacturer's instruction supplied
with the kit.
pg 2 of 4
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com

Page 38

SECTION 4. Installation

The FT Series, Wall Combi, Gas Conversion Kit
4.13 Natural Gas to Propane Conversion
ON

OFF

MIN Fire

Normal Operation

MAX Fire

Normal Operation

NG Natural

LP Propane

3” Vent Size

2” Vent Size

ON

CE
ENON
R
E
Y.
REF OFFONL
MBH

N/A

OFF
OFF
ON

140

DO

ON
OFF

OT

NON

N/A

Document 4288D

ON

GE
N
A
C H ON
ON

199

Table B DIP Switch Settings

9.
10.
11.
12.
13.
14.
15.
16.

17.
18.
19.
20.

Per Table B, set DIP Switch 5 to OFF for LP Propane.
Turn ON the GAS and WATER supply to the FT.
Turn ON the FT.

Figure D

Connect a manometer to the manifold pressure port. For dual port manometers, use the positive pressure
side. Check for proper manifold gas pressure. Refer to Table D.
Establish a call for heat. You may need to disconnect the outdoor reset if you are making this gas conversion
during warm weather.
Setup your combustion analyser and place the sensor into the combustion test port
Per Table B for Max Fire, change dip switch 6 to ON and 7 to OFF. The unit will cycle up to MAX fire.
WAIT for your combustion analyser to stabilize. This may take up to 3 minutes depending on your
combustion analyser. Then check the CO2 measurement for MAX fire. Refer to Table C for acceptable MAX
fire combustion readings Do NOT attempt to adjust CO2 at MAX Fire. ONLY in MIN Fire,
so...
Per Table B for MIN Fire, change dip switch 6 to OFF and 7 to ON. The unit will cycle down to MIN Fire.
WAIT for your combustion analyser to stabilize. Then check the CO2 measurement for MIN fire. Refer to
Table C for acceptable MIN fire combustion readings

Open the Gas Valve Adjustment Port by removing the cap screw with a 4mm Allen wrench.
Then use the 4 mm Allen wrench to make a minor adjustment (1/8 turn) to either increase or decrease CO2.

+

Gas Valve
Adjustment Port

-

Gas Valve
Adjustment Port

+

-

FTCW199

FTCW140

800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering)
pg 3 of 4
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130

Figure E

www.Laars.com

Page 39

The FT Series Wall Mounted, Combination Boiler

SECTION 4. Installation

The FT Series, Wall Combi, Gas Conversion Kit

Document 4288D

4.13 Natural Gas to Propane Conversion

NOTE: Installer is required to verify combustion settings as part of the installation process.
CO should not exceed 200 ppm.
Natural Gas (NG)

CO2 value

FTCW (ALL Sizes)

2˝ VENT

3˝ VENT

Propane Gas (LP)

2˝ VENT

3˝ VENT

MAX FIRE

8.5 - 10.5%

9.5 - 11%

MIN FIRE

8 - 10%

9 - 10.5 %

‘NG’ type combustibility

‘LP’ type combustibility

2"/3" VENT

2"/3" VENT

MAX FIRE

-0.216" WC

-0.216" WC

MIN FIRE

0.002" WC

0.079" WC

MAX FIRE

-0.314"WC

-0.173"WC

MIN FIRE

-0.015"WC

-0.015"WC

Table C

Manifold pressure
FTCW140
FTCW199

Table D

21.

It may be necessary to go back and forth between HI Fire and LOW Fire several times (and making
adjustments only at LOW Fire), before CO2 at both are within acceptable levels. Be sure to put the
adjustment port cap screw back onto the valve when done.

22.

Once the CO2 and manifold pressure measurements for both MIN and MAX Fire are acceptable per
Table C, set DIP switches 6 and 7 to the OFF position for Nominal Fire (normal operation).

23. Write in the correct Conversion Date and the Technicians Name to the included gas conversion
sticker. See Figure F. Then apply that sticker adjacent to the rating plate.

24. Remove your combustion analyser from the Test Port and be sure to thread the Test Port plug back
into position.

25. Re-connect outdoor reset if it was disconnected, put the boiler cover back on and assemble/tighten

H2373800D

the 4 screws that hold the cover in place.
This unit was converted on ____/____/___to _____gas
with kit #____________by______________________
(name and company __________________________
accountable)_________________________________
___________________________________________
Cette unité a été converti ____/____/____ten ______gaz
en utilisant le kit numéro _____
par______________
(nom et société_________________________________
responsable)___________________________________
_____________________________________________

Figure F (Conversion label)

800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering)
pg 4 of 4
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130

www.Laars.com

Page 40

SECTION 4. Installation
4.14 Plumbing Guidelines

	External Plumbing and Water Connection
Guidelines
-	Ensure pipe material meets local codes and
industry standards.
-	The pipe end must be clean and free of debris.
-	Do not apply torch heat within 12˝ of the bottom
connections of the unit.
-	The size of the DHW pipe should be 3/4˝
diameter and central heating water pipe should
be 1˝ diameter.
-	Isolation valves(Shutoff valve) will be used.
-	All piping should be insulated.

CAUTION
 se at least the MINIMUM pipe size for the entire
U
boiler loop piping (connecting boiler to and from
the primary/secondary connection). Use only
primary/secondary piping as shown.
Failure to follow these guidelines could result in
system problems.
CH pipe minimum size : 1˝
DWH pipe minimum size : 3/4˝

Applicable Backflow Preventer
-	Apply a backflow preventer valve in the DHW
supply inlet (water Inlet) to the unit as required by
local codes.

Automatic air vent
Air separator

TO DRAIN

Expansion tank
(Diaphragm-type)

Circulation pump
Check valve
Drain valve
Gate valve
Backflow preventer

TO DRAIN

Pressure Relief Valve

DHW OUTLET

DHW INLET

Page 41

The FT Series Wall Mounted, Combination Boiler

SECTION 4. Installation
4.14 Plumbing Guidelines

Zoning with circulation pump
-	Each heating zone of a pump based system has its own circulator pump which runs when the zone needs it.
- Each zone thermostat goes to a controller which controls the pumps..

Expansion tank
(Diaphragm-type)

Air separator
Circulation pump

TO DRAIN

Automatic air vent

Check valve
Drain valve
Gate valve
Backflow preventer

CH SUPPLY

PRIMARY LOOP
(SPACE HEATING)

TO DRAIN

Pressure Relief Valve

DHW OUTLET

Do not exceed 12" apart

ZONE 1

ZONE 2

ZONE 3

FLOOR HEATING

SECONDARY LOOP (SPACE HEATING)

DHW INLET

Page 42

SECTION 4. Installation
4.14 Plumbing Guidelines
Zoning with zone valve
-	In a valve based system, there is one circulator pump at the boiler and each heating zone has a zone
valve which opens when the zone.
-	Each thermostat is wired directly to the corresponding zone valve. Contacts in the zone valves provide a
proper signal to the boiler when the valve is opened.

Expansion tank
(Diaphragm-type)
Automatic air vent

TO DRAIN

Air separator
Circulation pump
Check valve
Drain valve
Gate valve
Backflow preventer
Pressure Relief Valve

TO DRAIN

CH SUPPLY

PRIMARY LOOP
(SPACE HEATING)

DHW INLET

DHW OUTLET
CH RETURN

PRIMARY/SECONDARY
CONNECTION

Do not exceed 12" apart

SECONDARY LOOP (SPACE HEATING)
ZONE 1
ZONE 2
ZONE 3
FLOOR HEATING

Page 43

The FT Series Wall Mounted, Combination Boiler

SECTION 4. Installation

4.15 Pressure Relief Valve

	External pressure relief valves must be installed.
Observe the following. Failure to comply with the
guidelines on installing the pressure relief valve and
discharge piping can result in personal injury, death
or substantial property damage.

WARNING
Do not operate this appliance before the
pressure relief valve supplied is installed with
sufficient relieving capacity in accordance
with the ASME Rating Plate on the boiler.
	This hot water boiler is provided with 30 psi safety relief
valve that complies with the ANSI/ASME Boiler and
Pressure Vessel Code, Section IV (“Heating Boilers).
(Model : CASE ACME F-82)
	This safety relief valve (30 psi) is shipped loose for field
installation.
	An approved ASME HV Pressure Relief Valve must be
installed on the DHW supply line as close to the unit
as possible. Valve size 3/4”, maximum 150 psi. Not
included with boiler.
	For safety, the relief valve(s) must be installed into it’s
designed location and not be removed or plugged.
Failure to comply with the guidelines on installing the
pressure relief valves and discharge piping can result in
personal injury, death or substantial property damage.
	Direct the discharge piping of the pressure relief valve
so that hot water will not splash on anyone or any
nearby equipment. Attach the discharge line to the
pressure relief valve and run the end of the line within
6-12″ (150-300mm) of the floor.

WARNING
	DO NOT install a CH pipe line relief valve with a
pressure higher than 30psi and DHW pipe line relief
valve with a pressure higher than 150psi. This is
the maximum allowable relief valve setting for the
combination boiler.
	Test the operation of the valve after filling and
pressurizing system by lifting the lever. Make sure the
valve discharges freely. If the valve fails to operate
correctly, replace it with a new relief valve. Ensure that
the discharge capacity of the pressure relief valve is
equal to or greater than the maximum pressure rating
of the combination boiler.

	Ensure that the maximum BTU/H rating on the
pressure relief valve is equal to or greater than the
maximum input BTU/H rating of the combination
boiler.
	Pressure Relief Valve must be installed on the CH
supply line & DHW outlet line as close to the unit as
possible. (CH supply line: maximum 30psi, DHW
outlet line : maximum 150psi). No other valves should
be placed between the pressure relief valve and the
appliance.
	This appliance has a high-temperature shut off switch
built in as a standard safety feature .Therefore a
“pressure only” relief valve is required.

3/4” 30psi Relief Valve

Page 44

SECTION 4. Installation
4.16  Disposal of Condensate

	High efficiency gas condensing Boilers create
condensation when operating. Condensation has
acidic (pH) of approximately 4-5.
	Condensate must be drained in accordance with all
local regulations. Follow your local code with regards
to the disposal of condensation.
One of 4 disposal methods must be followed
1.  to floor drain
2. to neutralizer (optional kit)
3. to laundry tub
4.  to condensate pump (field supplied)
	If a neutralizer is installed, periodic replacement of the
lime stone (or neutralizing agent) will be required. The
rate of depletion of the lime stone varies upon usage
of the boiler. During the first year of operation, please
check the neutralizer every few months for depletion.

Condensate
Trap

	Apply only corrosion-resistant materials for the
condensate drain lines such as 1/2˝ PVC, CPVC,
Polypropylene pipe or included plastic hose.

Condensate
drain pipe

		

(View is as if side panel
were removed)

NOTICE

For Category II and IV boilers, be installed so as to
prevent accumulation of condensate; and
For Category II and IV boilers, where necessary, have
means provided for drainage of condensate.

		

AVIS

les chaudières de catégories II et IV doivent être
installées de façon à empêcher l'accumulation de
condensat; et
si nécessaire, les chaudières de catégories II et IV
doivent être pourvues de dispositifs d'évacuation du
condensat.

CAUTION

Condensate is mildly acidic (pH=5), and may harm
some floor drains and/or pipes, particularly those
that are metal. Ensure that the drain, drainpipe, and
anything that will come in contact with the condensate
can withstand the acidity, or neutralize the condensate
before disposal. Damage caused by failure to install
a neutralizer kit or to adequately treat condensate
will not be the manufacturer’s responsibility.
Contact Manufacturer to order
     Neutralizer Kit# A2123601
_________________________________________

2
1

3

4

Page 45

The FT Series Wall Mounted, Combination Boiler

SECTION 4. Installation
4.17 DHW Flow Restrictors

WARNING

Only on the FTCW140

If the appliance has been filled and operational,
then the gas, water and power must be completely
shut off, and the unit must be drained before
proceeding with this instruction. See Section 8 of
this installation book.
Failure to do so could result in substantial
property damage, sever personal injury, or death.

A flow restrictor, rated at 3.2 GPM and white in color,
is pre-installed into the FT at the DHW inlet adapter.
An additional flow restrictor, rated at 4.5 GPM,
is blue in color and is packaged with the Product
Accessories. See Section 1.
If 3.2 GPM is not sufficient for your installation,
replace the factory installed white flow restrictor with
the blue flow restrictor by following these instructions.
To replace the Flow Restrictor.
1. Being sure that the unit of completely Off and
drained, locate the DHW inlet adapter on the bottom
of the appliance.
2. Pull the two pins to release the DHW inlet filter. See
Illustration. The flow restrictor is attached to the top
of the filter assembly.
3. Remove the installed white flow restrictor and
replace it with the blue flow restrictor included with
the Product Accessories.
4. Reinstall the DHW inlet filter.
5. Re-insert the two pins.

Only on the FTCW140

6. Refill and restart your FT as per the Installation
Instructions.

6

Performance Graph

5
Un

Flow (GPM)

4

r

tr
es

4.5

ic t

GP

ed

M

er
( b lu

e st r i

wh i t e
PM (
G
2
.
3

3

c t o r)

r e s t ric t

or )

2
1
0

10

20

30
40
Pressure (PSI)

50

60

  70

80

Page 46

SECTION 4. Installation

4.18 Electrical Wiring Connections

FTCW140

Manual Switch

Terminal Block
L N

0 - 10V
External Input

0-10V
INPUT

TT

Thermostat
Connection

O/S

Outdoor
Sensor

WARNING
	Install wiring and electrically ground boiler in accordance with authority having jurisdiction or, in the
absence of such requirements, follow the National Electrical Code, NFPA 70, and/or CSA C22.1
Electrical Code-Part 1 in Canada.
	ELECTRICAL SHOCK HAZARD — For your safety, turn off electrical power supply at service
entrance panel before making any electrical connections to avoid possible electric shock hazard.
Failure to do so can cause severe personal injury or death.

	This appliance must be electrically grounded. Ensure the electrical receptacle that the combination boiler will
be plugged into, is properly grounded; if wiring directly.
	Do not attach the ground wire to either the gas or the water piping as plastic pipe or dielectric unions may
isolate the Combination boiler electrically.
	The wiring diagrams contained in this manual are for reference purposes only.
	Refer to these diagrams and diagrams from external controls used with this appliance. Read, understand,
and follow all wiring instructions.
	Do not disconnect the power supply when the unit is in normal operation. Damage caused by freezing is not
covered under the warranty.
	Manual(Rocker) switch maximum allowable current for each circulator is 16 amps at 125VAC.
	( Housing : Nylon #66 UL 94V-2 , Rocker : Nylon #66 UL 94V-2, Terminal : Copper Alloy )
	Terminal block (External power connector) : DFT-20A-10P (20 amps at 300VAC)

Page 47

The FT Series Wall Mounted, Combination Boiler
4.18 Electrical Wiring Connections (cont)
FTCW199

Terminal Blocks

Manual Switch
MAIN POWER

0-10V
INPUT

CH/BOILER PUMP

0 - 10V
External Input

External
CH Pump

Main
Power

The FT Series, Wall Combi, Gas Conversion Kit

TT

Thermostat
Connection

O/S

Outdoor
Sensor
Document 4288D

4.19 DIP Switches

E
REF
MBH

R

ON

OFF

MIN Fire

Normal Operation

MAX Fire

Normal Operation

NG Natural

LP Propane

3” Vent Size

2” Vent Size

ON

OFF

LY.
N
O
OFF

OFF

N/A

140

CE
ENON

ON

DO

ON
OFF

OT
NON

N/A

ON

ON G E
N
A
H
ON
C

199

Table B DIP Switch Settings

9. Per Table B, set DIP Switch 5 to OFF for LP Propane.
System
Control
ON Setting
the GAS and WATER supply to the FT.
10. Turn
Figure D
the FT.flame detecting voltage
11. Turn ON
Maximum
2.4V
to the
the positive
pressure
Pre-purge time
(Tp)manifold pressure port. For dual port manometers,
Maximum 10s,use
minimum
1s
12. Connect a manometer
13.
14.
15.
16.

17.

side. Check
proper
manifold
gas pressure. Refer to Table D.
Safetyfor
Time
(igniting
time) (Ts)
3s
Establish a Igniting
call for interval
heat. You
may
need
to
disconnect
the
outdoor
reset
if
you
are
time
10s making this gas conversion
during warm
weather.time (Tip)
Post-purge
120S (1st : 60s + 2nd 60s)
Setup
your
combustion
analyser
and
place
the
sensor
into
the
combustion
test
port
Over-heating 1,2,3 protection detection time
<3s

Per Table
for Max
Fire, time
change
dip switch 6 to ON and 7 to OFF. The unit will
cycle up to MAX fire.
Pump1Bpost
circulating
(T1pv)
60s
WAITPump2
for your
combustion
analyser
depending on your
post
circulating time
(T1pv)to stabilize. This may take up to 3 minutes
60s
combustion
analyser.
Then
check
the
CO
measurement
for
MAX
fi
re.
Refer
to
High & Low Water Level detection time 2
<6sTable C for acceptable MAX
fire High
combustion
readings
Do
NOT
attempt
to
adjust
CO2
at
MAX
Fire.
ONLY in MIN Fire,
& Low Water Level Recover time
<6s
so...
Per Table B for MIN Fire, change dip switch 6 to OFF and 7 to ON. The unit will cycle down to MIN Fire.
WAIT for your combustion analyser to stabilize. Then check the CO measurement for MIN fire. Refer to

Page 48

SECTION 4. Installation

4.20 Control Board, Electrical Diagram

Control Board

Page 49

The FT Series Wall Mounted, Combination Boiler

SECTION 4. Installation
4.21 Ladder Diagram

F/B

level

Air Pressure Sensor

Page 50

SECTION 4. Installation
4.22 Electrical Connections

Connector
#, Location, Type

CN9
65001WS-12

CN6
LW6A4-03
CN1
SMW250-5D

CN4
LWD1140-06D

CN8
SMW250-04D

CN11
LWD1140-16

PIN

Label

1
2
3

L
CP1

4

IT

5

Description

HT SELV

GROUND
Power Supply Line
Not Used

HT (120V~)
HT (120V~)
HT (120V~)

Igniter

HT (120V~)

L(HT)

Pump : CH

HT (120V~)

6

GV

Gas Valve

HT (120V~)

7

-

-

8
9-12
1
3
1
2
3
1
2
3
4
5
6
1
2
3
4
1
8
2
10
3
11
4
12
5
13
6
14
7
15
8

N
N

Power Supply Neutral
AC Power COM Line

16

-

RS485 +
GND
RS485 Not Used
GND
VDD
Fan power(start coil)
Fan power(end coil)
Fan speed feedback signal
GND
ISP /Reset port
ISP TOOL0 Data port
VCC

HT (120V~)
HT (120V~)
HT (120V~)
HT (120V~)
SELV (5V)
SELV (5V)
SELV (5V)
SELV (30V)
SELV (14V)
SELV (30V)
SELV (30V)
SELV (14V)
SELV (5V)
SELV (5V)
SELV (5V)
SELV (5V)

HWL

Not Used

SELV (12V~)

LWL

Low Water Level Leakage Sensor

SELV (12V~)

HD

Central Heating Demand

SELV (5V)

TH

Connect to the Display
Control(Thermostat)

SELV (14V)

APS

Jump

SELV (14V)

EL

Jump

SELV (14V)

BL

Burner Limit

SELV (14V)

HL

Condensate Block

SELV (14V)

CP3/3Way
RS-485

FAN

MCU ISP

3 Way Valve

Page 51

The FT Series Wall Mounted, Combination Boiler

SECTION 4. Installation
4.22 Electrical Connections

Connector
#, Location, Type

PIN
1

SELV (5V)

OP.S

Operating water temperature sensor

SELV (5V)

DH.S

DHW temperature sensor

SELV (5V)

I.S

Return temperature sensor

SELV (5V)

BG.S

Venting (Exhaust) temperature sensor

SELV (5V)

ST.S

Not Used

SELV (5V)

SP.S

Over-Heat temperature sensor

SELV (5V)

1

GND

SELV (14V)

2

DHM Stepper motor position

SELV (14V)

3

VDD

SELV (14V)

4

DHM Stepper motor coil X phase

SELV (14V)

DHM Stepper motor coil Y phase

SELV (14V)

6

VDD

SELV (14V)

7

DHM Stepper motor coil /X phase

SELV (14V)

8

DHM power IWM Stepper motor coil /Y phase

SELV (14V)

9

Unuse

2
9
3
10
4
11
5
12
6
13
7
14

CN14
SMW250-09D

5

1
2
CN3
SMW250-06D

3

F.S

DHM

APS
SENSOR

4
5

FLUX1

6
CN5
SMW250-10D

HT SELV

Flame Detect Sensor

8

CN7
LWD1140-14

Description

Label

1
2

RPM

-

VCC

SELV (5V)

GND

SELV (5V)

Voltage Input

SELV (5V)

VCC

SELV (5V)

Water Flow Sensor

SELV (5V)

GND

SELV (5V)

FAN RPM Check

SELV (5V)

GND

SELV (5V)

Page 52

SECTION 5. Control Display and Operation

5.1 Control Dial and Buttons

The Control Display

Status Light
(constant green
when operating
normally)

The Control Display has a Control Dial (E), 4 buttons (A, B, C, D), and a Liquid
Crystal Display (with 72 back-lit segments). This section of this manual gives
instruction on how to navigate into the many functions of the FT and to change
temperature set points, set system variables and controller parameters.

Buttons
A

Display Power

Functionality
PRESS (Tap)
Turns Control Display

PRESS and HOLD (5 seconds)

ON / OFF

Tap to return to menu

(If Display Power was On ) Status Display Mode
(If Display Power was Off ) Installer Mode

Hot Water

DHW Set-Point LOW Range

DHW Set-Point HIGH Range

D

Central Heat

CH set-point mode (boiler only)

Toggle (°C / °F)

E

Scroll / Select

B

Modes

C

95 - 120°F (35 - 49°C)

Turn to scroll, tap to select

(clockwise or counterclockwise)

• Temperature Specifications
Operating ambient Temperature Range : -10 to 60°C.
Operating Relative Humidity up to: 90% at 40°C.
Shipping & Storage Temperature Range of : -20 to 80°C.

121 - 140°F (49.5 - 60°C)

Page 53

The FT Series Wall Mounted, Combination Boiler

SECTION 5. Control Display and Operation
CH
Central
Heat

Anti-Freeze
Mode

Storage
Heating

5.2 LCD Overview

Lock

Communicating
Status and
Installer
Modes

Summer Mode
(warm
weather
shutdown)

Flame
Signal

Outside
Temp Mode
or 0-10V
Domestic Hot Water Mode

Pump

Numeric Display

CH mode

Central Heat mode icon can be adjusted

Anti-freeze mode

Anti-freeze mode icon

Storage Heating mode

Stored Water Being Heated, can be adjusted

Lock mode

Buttons-locked mode icon

Communication

Communication icon

Summer mode

Only DHW Mode, can be adjusted (warm weather shutdown)

Status and Installer mode

The Status Mode or the Installer Mode is Active (all parameters)

Flame signal

Flame Signal icon

Pump icon

Water pump operation (CH or DHW) icon

Numeric Display

Number and character display, to display all parameters

DHW mode

Combination boiler Set Point, can be adjusted

Outside temp or 0-10 V mode

Operating by outside temperature or 0-10V

The LCD will illuminate when a user action is detected (a button is pressed) and will turn
back off after 20 seconds.
* NOTE: The display will not allow changes when the lock mode
To exit the Lock mode, press the

WARNING

button.

Do not use this appliance if any part has been under
water. Immediately call a qualified service technician
to inspect the appliance and to replace any part of
the control system and any gas control that may have
been under water.

is activated.

Page 54

SECTION 5. Control Display and Operation

5.3 Operating Mode

Operating Mode

After the Power is turned on, and/or the Control Display is turned on
, the Control Display
will go through a ‘Start Up’ checklist and briefly show a sequence of diagnostic codes before
entering into the ‘Operating Mode. It will then display the following information.

Indicate
Current Operating Temperature
Temperature sign Celsius or Fahrenheit letter
Display and Controller are communicating
If flame detected
If pump is operating
Outdoor sensor or 0-10V

Example
110°F
°C or °F

Page 55

The FT Series Wall Mounted, Combination Boiler

SECTION 5. Control Display and Operation
AUTODESK � � � � � � � � � �

5.4 Status Display Mode

AUTODESK � � � � � � � � � �

AUTODESK � � � � � � � � � �

Digital Display

Status Display Parameter

Description

O:ot

Outdoor temperature

Current Outdoor temperature

A: Li or A: GA

Flow unit

Current flow value(Li: L/m, GA: GPM)

b: It

CH Return Water Temperature

Current Return Water Sensor Temperature

C: Fr

Fan rpm

Current fan rpm value

d: Lc

Lock mode

Lock mode ON/OFF

E: oP

OP temperature

Current OP temperature

F: dH

DHW temperature

Current DHW temperature

H: Eh

Exhaust temperature

Current Exhaust temperature

I : St

N/A

Not Used (Default is 0)

L: rt

P: Ou

AUTODESK � � � � � � � � � �

J: oH

Overheat temperature

Current Overheat temperature

1: PH

Supply power time

Supply power time x 100 hour

2: rh

Burner operation
time

Burner operation time x 1 hour

Burner operation
time

Burner operation time x 1,000 hour

4: It

Ignition cycles

Ignition cycles x 10 times

5: IH

Ignition cycles

Ignition cycles x 10,000 times

3: rH

Burner Operation Time

Displays output condition for internal
primary pump and three way valve.
- Off

1st Icon

2nd Icon

3rd Icon

Not Used

Internal
CH
Pump

3 Way Valve

- On

To change any of the above listed Status Parameters,
Press and Hold Button B

to get into the Status Display Mode.

Rotate Dial E until you find the Parameter that you wish to change. Tap Dial E to enter that Parameter.
Adjust to the setting that you require and then press (tap) Dial E to save and to Exit.

Page 56

SECTION 5. Control Display and Operation

5.5 DHW Set Point Change Mode

DHW Set Point Change Modes

The display shows the following
information when changing water heating
temperature set points.

Changing between Celsius and Fahrenheit
When the button D
is pressed (for more
than 5 seconds), temperature unit will toggle
between °C and °F.

Indicate

Example

Current DHW set-point temperature

120°F

Temperature sign Celsius or Fahrenheit letter

°C or °F

If display is communicating with the main controller normally, the communication icon will
be indicated.
When DHW set-point range is high : from 121°F (49.5°C) to 140°F (60.0°C)
When changing DHW setpoint, the DHW icon will flash

H . 140°F
S24

* Default DHW set-point is 120°F (49°C)

• DHW 95-120°F (35 - 49°C) LOW range (Default)
-To change LOW range, press the C Button. The DHW icon and current DHW LOW will flash (a

flashing value means it can be changed).
-Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached.
-Press dial E to save setpoint changes.

• DHW 121 - 140°F (49.5 - 60°C) HIGH range
-To change HIGH range, press and HOLD the C button for more than 5 seconds. The DHW icon

and current DHW HIGH will flash (a flashing value means it can be changed).
-Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached.
-Press dial E to save setpoint changes and to Exit.

DANGER

Scalding may occur within 5 seconds at a setting of 140°F (60°C). Water temperatures
over 125°F can cause severe burns, or death from scalding. Children, disabled,
and elderly are at highest risk of being scalded. Read all instructions before setting
temperature at appliance. Feel water before bathing or showering.

Page 57

The FT Series Wall Mounted, Combination Boiler

SECTION 5. Control Display and Operation

5.6  CH Set Point Change Mode

Changing between Celsius and Fahrenheit
When the button D
is pressed (for more than
5 seconds), temperature unit will toggle between
°C and °F.

Indicate
Current Operating Temperature
Temperature sign Celsius or Fahrenheit letter

Example
110°F
°C or °F

Display and Controller are communicating
If flame detected
If pump is operating
When changing CH Setpoint, the CH Icon will flash
Default CH set-point is 120°F (49°C)
CH set-point range is 86 - 180°F (30.0 ~ 82.0°C)

To c
 hange CH Setpoint, press the D

button. The CH Icon and current
CH Setpoint will flash.
Turnthe E dial clockwise to increase, and counterclockwise to decrease CH setpoint, until
desired temperature is reached.
Press E dial to save changes and to Exit.

5.7 Storage Mode

Indicate
Current Operating Temperature
Temperature sign Celsius or Fahrenheit letter

Example
110°F
°C or °F

Display and Controller are communicating
If flame detected
Storage mode indication
If Pump is operating

To change Storage Mode Temp, First turn OFF the power to the Control Display.

Then Press and Hold Button B
to get into the Installer Mode.
Rotate Dial E until you find 5:St Tap Dial E to enter Storage Mode. Storage Mode indicates that the boiler
is heating the water held in the internal storage tank. When Storage Mode is active, the display will
appear as shown.
Turn the E dial clockwise to increase, and counterclockwise to decrease setting.
Press E dial to save changes and to Exit.

Page 58

SECTION 5. Control Display and Operation

5.8 Installer Mode

AUTODESK � � � � � � � � � �

AUTODESK � � � � � � � � � �

AUTODESK � � � � � � � � � �

These changes are to be made only by a qualified technician.
AUTODESK � � � � � � � � � �

To change any of the Installer Parameters, Start by turning OFF the Power
to the Display Control.

Then, with the power OFF, Press and HOLD (more than 5 seconds) the Button B
Installer Mode.

to get into the

Rotate Dial E until you find the Installer Parameter (full list on facing page) that you wish to change.
Tap Dial E to enter that Parameter.
Adjust to the setting that you require and then press (tap) Dial E to save and to Exit.
Finish by pressing button B

Page 59

The FT Series Wall Mounted, Combination Boiler

SECTION 5. Control Display and Operation
Index

5.8 Installer Mode

Parameter

Description

1: EH

History entry

History fault code (E0~E9)

2: cE

Clear Error History

Clearing of error History buffer

3: In

System initialize

System initialize to default

4: Fu

Flow unit

gallon / liter

5: St

Heat storage function

Heat storage function On/Off

6: OH

Maximum Outdoor
Temperature

When used with an outdoor sensor, sets the maximum outdoor design temperature for the system
design. Warm weather shut down will disable the appliance if the programmed outdoor temperature is
exceeded. Maximum outdoor temperature must be set 9°F above the minimum outdoor temperature.
Range: (Minimum Outdoor Temperature + 9°F) to 110°F Default 68°F (20°C)

7: OL

Minimum Outdoor
Temperature

Sets the minimum outdoor design temperature for the system. Minimum outdoor
temperature must be set 9°F below the maximum outdoor temperature.
Range: -4°F to (Maximum Outdoor Temperature - 9°F)

8: FH

Max fan

Adjusts Maximum Fan Speed
Range: -30 - +30

9: FL

Min fan

Adjusts Minimum Fan Speed
Range: -30 -+30

10: dr

Delete running time

Delete running time

11: dI

Delete igniting times

Delete igniting times

12: bt

Outside Unit Function
Delay Time (boost time)

When heating in the outside unit function for the first time, there will be a delay.
(0~120 min, Default 0)

13: Ft

Delay time for heating
burner operation

Burner does not operate during the delay time when the burner is turned off due to the
temperature during heating operation. (0~20 min, Default 1 min)

14: bo

Setting temperature of
burner ON.

Heating temperature setting during heating operation –
Operate in burner ON temperature setting Range:
-12.7°C(9°F)~-2.7°C(27°F), Default 2.7°C(27°F)

15: OF

Warm Weather Shutdown

This warm weather temperature setting will shut down CH Mode 10°C(50°F)~43°C(110°F),
Default 38°C (100°F)

16:cH

Setting for Heating
Maximum Temperature

Range:[Minimum Temperature -12.7°C(9°F)]~82°C(180°F), Default 82°C(180°F)

17:cL

Setting for Heating
Minimum Temperature

Range: 30°C(86°F)~[Maximum Temperature-12.7°C(-9°F)],Default 30°C(86°F)

18:dH

Setting for Hot Water
Maximum Temperature

49°C(120°F)~60°C(140°F), Default 60°C(140°F)

19:cb

Heating Combustion Rate

50%~100%, Default 100%

20:db

Hot Water Combustion Rate 50%~100%, Default 100%

21:PP

Pump Post-Purge Time

(Heating Pump) 1min ~ 60min, Default 40min

22:Po

Pump on Time

(Heating Pump Repeat ON Time) 1 min ~60 min, Default 5 min

23:PF

Pump off Time

(Heating Pump Repeat Off Time) 0min ~60 min, Default 10 min

24:SF

Heat storage off
Temperature

60°C(140°F)~75°C(167°F),Default(70°C)158°F

25:So

Heat storage on
Temperature.

(off Temperature-Setting Temperature) -12.7°C(9°F)~2.2°C(36°F),
Default (-2.7°C) 27°F

26:dt

Delay time when switching
from DHW mode to CH
Range: 0 – 2 minutes,Default 2min
mode

27:PE

Internal CH Pump PostPurge Time,
T/T Satisfied

Allows the user to set the appliance pump post purge time once the appliance CH setpoint
and thermostat are satisfied. Range: 1-5 minutes,Default 1min

28: HA

High Altitude setting

(Normal)0<1<2<4 (High)

Internal CH Pump and
3-way valve Pump Test
Mode

This function sets the time to run both the Internal CH and 3-way valve pumps to purge
air from the system. Range: 1 – 30 minutes ,Default 5min

Internal CH Pump and
3-way valve Pump Test
Mode

Turn this function on to activate Internal CH and 3-way valve pump testing.
Only works in installation mode. Turns off when in normal mode. Default OFF

DHW Timeout Feature

Range: 0~12 time, '0' OFF, Default: 4 time

29: AP

30: dP

The Full List of Installer Mode Parameters

Page 60

Outdoor Reset varies the control setpoint based on
the outdoor temperature. The reset function works
as shown in Figure ‘CH Outdoor Reset’. When the
outdoor air temperature reaches 6:OH “high outdoor
temperature setpoint”, the control point setting is
adjusted to 17:cL “low boiler temperature setpoint”.
When the outdoor air temperature reaches 7:OL “low
outdoor temperature setpoint” the control setpoint is
adjusted to 16:cH “high boiler temperature”.
Default outdoor reset setpoint is 100°F (38°C)
The Outdoor Temperature Mode Icon on the display
will flash if an Outdoor Sensor or 0-10 Volt is not
connected to the appliance.
To check the CH Target Temperature while using
Outdoor Temperature Mode, press the
button
while the appliance is operational and the display
panel is powered on.

5.9 Outdoor Reset Adjustment

Op

er

at

ing

co

nd

itio

n

CH Outdoor Reset

Connect to terminal strip as outlined 4.17 Electrical Connections.
NOTE: 0 - 10VDC terminals may not be used for both outdoor reset and 0 - 10VDC temp
setpoint simultaneously.

5.10 External Set Point Temperature Control
A signal from a building management system may be connected to the appliance to enable remote
control. This signal should be a 0-10 volt DC signal. When this input is enabled, a building control
system can be used to control the set point temperature of the appliance.
The control interprets the 0-10 volt signal as follows; when the signal is between 0 and 1.5 volts, the
appliance will be in standby mode, not firing.
When the signal rises above 1.5 volts, the appliance will ignite. As the signal continues to rise
towards its maximum of 10 volts, the appliance will increase in set point temperature. Adjust 16:cH
and 17:cL to set MIN and MAX boiler water temperatures respectively.
Connect a building management system or other auxiliary control signal to the terminals marked
for this purpose on the appliance terminal block (shown in Piping Diagrams, this manual). Caution
should be used to ensure that the 0-10 VOLT + connection does not become connected to ground.
Connect to terminal strip as outlined 4.17 Electrical Connections.
NOTE: 0 - 10VDC terminals may not be used for both outdoor reset and 0 - 10VDC temp
setpoint simultaneously.

(warm weather shutdown)

SECTION 5. Control Display and Operation

Page 61

The FT Series Wall Mounted, Combination Boiler

5.11 Error Mode

Flashing

Indicate

Example

Error ‘ Er : ’ will flash

Er:11

Error Code

Er:11

Display and Controller are communicating
NOTE: When communication between the Control Display and the main controller is lost, the
will not be displayed.

Page 62

SECTION 6.  Error Codes
Error
Code

Error Code
Description

Possible Remedies

Recover
methods

Flame has
Extinguished 8 (Eight)
Times

Press the Power button to clear the Error Code.
If Error happens again:
1. Monitor the gas pressure to the appliance while in operation. Ensure pressure is
between 3.5 and 14” WC.
2. Check gas valve wire. Ensure connection is secure.
3. Check flame detection sensor. Ensure connections are secure. Normal operating
settings are more than 2.5DC before ignition, less than 2.5DC after ignition.
4. Check vent terminations. Ensure there are no blockages.
5. Assure that the flame is stable when lit.
6. If the problem persists, replace the main control.

Hard
Lock

Ignition has Failed 10
(Ten) Times

Press the Power button to clear the Error Code.
If Error happens again:
1. Monitor the gas pressure to the appliance while in operation. Ensure pressure is
between 3.5 and 14” WC.
2. Check gas valve wire. Ensure connection is secure.
3. Check flame detection sensor. Ensure connections are secure. Normal operating
settings are more than 2.5DC before ignition, less than 2.5DC after ignition.
4. Check igniter transformer for proper connection.
5. Clean the spark igniter with steel wool to remove oxides. Ensure proper separation (3-4 mm).
6. Replace the spark igniter if damaged.
7. Assure that the flame is stable when lit.
8. If the problem persists, replace the main control.

Hard
Lock

Operating
Temperature Sensor
detects Water
Temperature Greater
than 203°F (95°C)

Press the Power button to clear the Error Code.
If Error happens again:
1. Check if dip switch Max Fire setting is ON. Switches 6 and 7 should be OFF for
normal operation.
2. Check if CH inlet pipe is blocked. Ensure there is enough water flowing to the
appliance.
3. Check Operating Temperature sensor at CH heat exchanger outlet. If resistance is
zero, replace the sensor.
4. If the problem persists, replace the main control

Hard
Lock

Condensate – Closed
is Normal, Open is
Fault (Condensate
Drain Trap)

Press the Power button to clear the Error Code.
1. Check Condensate and main controller connections. Ensure all are secure.
2. Check Condensate sensor resistance. If resistance is zero, replace the switch.
3. Check Condensate hose. Ensure it is connected and in good condition.
4. Check condensate line and termination for blockages.
5. Check Vent Pipe for blockages.
6. If the problem persists, replace the main control.

Hard
Lock

Overheat Sensor Open
or Short

This Error Code will go away when CH temperature decreases.
If Error happens again:
1. Check overheat temperature sensor. Ensure connections are secure.
2. Check overheat sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.

Soft Lock

32

DHW Sensor Open or
Short

This Error Code will go away when outlet DHW temperature decreases.
If Error happens again:
1. Check DHW outlet temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.

Soft Lock

33

CH Temperature
Sensor Open or Short

This Error Code will go away when CH temperature decreases.
If Error happens again:
1. Check CH temperature sensor. Ensure connections are secure.
2. Check CH sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.

Soft Lock

10

11

16

20

28

Page 63

The FT Series Wall Mounted, Combination Boiler

SECTION 6.  Error Codes (continued)
Error
Code

Error Code Description

Possible Remedies

Recover
methods

Venting (Exhaust) Sensor
Open or Short

This Error Code will go away when exhaust temperature decreases.
If Error happens again:
1. Check Venting (exhaust) temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. Check vent pipes for blockage.
4. If the problem persists, replace the main control

Soft Lock

Abnormal Supply Voltage

Supply voltage is too low to operate. This Error Code will go away when supply
voltage returns to normal operating range.
If Error happens again:
1. Ensure appliance is properly wired to a power source meeting the
requirements on the rating plate.
2. If problem persists, replace the main control

Soft Lock

37

Abnormal Supply Frequency

Supply frequency is too high to operate. This Error Code will go away when
supply frequency returns to normal operating range.
If Error happens again:
1. Ensure appliance is properly wired to a power source meeting the
requirements on the rating plate.
2. If problem persists, replace the main control.

Soft Lock

38

Error Appears When Control
Stores Data, but Data is not
Saved

Press the Power button to clear the Error Code.
Replace the main control.

Hard Lock

Gas Leakage is Detected for
Greater than 5 seconds, or
three times within 10 minutes

IMPORTANT: If you smell gas, STOP! Follow the instructions on page 2, this
manual, and call a qualified service technician or the fuel gas utility.
Press the Power button to clear the Error Code.
If Error happens again:
1. Check the appliance cover. Ensure it is secure.
2. Check gas connections for leakage with a soapy solution. Fix any leaks.
3. Check condition of the burner assembly.
4. If the problem persists, replace the main control.

Hard Lock

41

Fan Speed too High with
Flame On

Press the Power button to clear the Error Code.
If Error happens again:
1. Check the vent connections for blockages.
2. Check the burner assembly.
3. C
 heck fan operation. If fan appears to be operating normally but RPMs are too
high, replace the fan.
4. If the problem persists, replace the main control.

Hard Lock

42

Jumped Wire Disconnected

Press the Power button to clear the Error Code.
If Error happens again:
1. Ensure the jumped wire is properly connected.
2. If the problem persists, replace the main control.

Soft Lock

Burner Overheat Switch
Open

Press the Power button to clear the Error Code.
If Error happens again:
1. Check burner overheat switch connections. Ensure connections are secure.
2. Check switch resistance. If resistance is zero, replace the switch.
3. If the problem persists, replace the main control.

Hard Lock

44

Air Pressure Sensor (APS)
Fault

Press the power button to reset
If error happens again:
1. Check the vent pipe for blockages.
2. Check the vent pipe for blockages.
3. If error do not clear, replace the APS
4. If the problem persists, replace the main control.

Hard Lock

45

Air Pressure Sensor (APS)
Open

Check the aps connection.
1.If APS is closed and connections are secure, check APS connection.
2. If the problem is not happen, replace the APS
3. If the problem persists, replace the main control.

Soft Lock

Fan Speed Feedback Signal
Abnormal

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check the connections to the fan. Ensure all are secure.
2. If the fan does not rotate during the ignition sequence, check for AC8V~26.5V
power at the fan connection. If AC8V~26.5V power is present at the control,
replace the fan. If the blower does not have AC8V~26.5V power, check power at
the control. If AC8V~26.5V power is not present at the control, replace the control.
3. If the problem persists, replace the main control.

Soft Lock

35

36

40

43

61

Page 64

SECTION 6.  Error Codes (continued)
Error
Code

Error Code Description

66

Mixing Valve Initial Value
Error
(Mixing Valve Cannot Return
to Initial Position)

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the appliance.
2. Check wiring connections to mixing valve. Ensure all are secure.
3. Replace mixing valve.
4. If the problem persists, replace the main control.

Soft Lock

68

Mixing Valve Operation Error
(Mixing Valve Stuck in Initial
Position)

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the appliance.
2. Check wiring connections to mixing valve. Ensure all are secure.
3. Replace mixing valve.
4. If the problem persists, replace the main control.

Soft Lock

70

Register, Ram, Rom, I/O
Port, AD Abnormal, Important
EPROM Data or Safe Data
Abnormal

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the appliance.
2. If the problem persists, replace the main control.

Soft Lock

Flame Signal Detected before
Ignition

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check the appliance cover. Ensure it is secure. Flame detection sensor can detect
an external light source.
2. Check flame detection sensor. Ensure connections are secure. Normal operating
settings are more than 2.5DC before ignition, less than 2.5DC after ignition.
3. If the problem persists, replace the main control.

Soft Lock

Poor Communication

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check connections from main control to display panel.
2. If the problem persists, replace the display and/or the main control.

Soft Lock

Low Water Level Sensor
(Low Water Level Detected
Four (4) Consecutive times)

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Ensure all valves are open to the appliance and there are no leaks.
2. Ensure all air has been purged from the system.
3. Check wiring connections to low water level sensor. Ensure all are secure.
4. Check low water level sensor resistance. If resistance is zero, replace the sensor.
5. If the problem persists, replace the main control.

Soft Lock

Low Water Level Circuit

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Ensure all valves are open to the appliance and there are no leaks.
2. Check wiring connections to low water level sensor. Ensure all are secure.
3. Check low water level sensor resistance. If resistance is zero, replace the sensor.
4. If the problem persists, replace the main control.

Soft Lock

Freeze Protection
(Appliance has detected
water temperature below
34°F(1°C)

This Error Code will go away when the freezing condition is remedied.
If Error happens again:
1. Ensure appliance is located in a mechanical room protected from freezing conditions.
2. Ensure all valves are open to the appliance, there are no leaks.
2. Check wiring connections to low water level sensor. Ensure all are secure.
3. Check low water level sensor resistance. If resistance is zero, replace the sensor.
4. If the problem persists, replace the main control.

Soft Lock

Exhaust Sensor detects Vent
Temperature is Greater than
190oF (88oC)

This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check if dip switch Max Fire setting is ON. Switches 6 and 7 should be OFF for
normal operation.
2. Check exhaust temperature sensor. Ensure connections are secure.
3. Check sensor resistance. If resistance is zero, replace the sensor.
4. Check exhaust vent for blockage.
5. If the problem persists, replace the control.
6. If the problem persists, replace the heat exchanger.

Soft Lock

72

76

80

81

85

94

Possible Remedies

Recover
methods

The FT Series Wall Mounted, Combination Boiler
6.2  Fault Tree Analysis

1. Flame detection

Page 65

Page 66

6.2  Fault Tree Analysis
2. Gas Detection

3. ‘Storage’, ‘DHW’, ‘OP’, ‘CH overheat’, ‘Exhaust heat’ Sensor detects

Error code

contents

E32

DHW NTC open or short

E33

OP NTC open or short

E35

Exhaust NTC open or short

Page 67

The FT Series Wall Mounted, Combination Boiler

SECTION 7. Trouble Shooting
Question

7.1 Diagnostics
Answer

Make sure that the ON/OFF button on the Control Panel has been turned ON.
If the monitor on the Control Panel is blank, make sure the power cord is
plugged and 4A fuses on the main controller in the units are good.
Burner dose not ignite
when the hot water is
opened.

Make sure that there is water supplied to the unit. The unit activates once
the inlet water flow is over 0 gpm.
Make sure the cold and hot water lines are not plumbed in reverse side.
Make sure that the cold water and gas supply lines are opened.
Make sure that the water lines are not frozen.
Check that the setting temperature on the unit is not too low
Make sure that the filter in the cold water supply line is not clogged with
debris.

Water is not hot enough. Make sure that the gas supply type is correct.
Check the supply and manifold gas pressures are in accordance with
specifications.
Make sure that the water flow sensor with three wires has been properly
connected on the top of heat exchanger.
Make sure that the setting temperature on the unit is not too hot.
Water is too hot.

Make sure that the filter in the cold water supply line is not clogged with
debris.
Make sure that the gas supply type is correct.
Make sure that the filter in the cold water supply line is clean.

Hot water temperature
fluctuates at the opened
tap.

Make sure that the gas supply type is correct.
Check the supply gas pressure is sufficient.

The blower is still
operating after the
combustion stops.

This is normal because the blower keeps operating for 1 minute to vent
(exhaust) the flue gas from the chamber once the combustion has
stopped.

Temperature Rise
too Quickly

Occurs when supply water temperature in heat exchanger rises faster
than 2°F per second during the first two minutes the burner is on.
Automatically resets after a few minute delay or using manual reset on
control panel. See message displayed TEMPERATURE SENSOR and
follow procedure for loose connections.

Abnormal sounds come
from unit during operation.

A leak of combustion gas between sealed chamber and exhaust tube
inside the unit. Call a qualified service technician for evaluation.
Improper venting termination, make sure that the venting termination
complies with specification.
Check the supply gas pressure is sufficient. Insufficient gas pressure will
cause unstable burner flame and noise.

Page 68

7.2 Suggested Corrective Actions
This controller is able to record information about the boiler’s condition at the time of the five previous faults or
errors. Refer to the Section ‘5.10 Error Mode’ of this manual.

Display

Nothing shown
on display control
panel and blower
running at full
speed.

Nothing is shown
in display control
panel and no
other boiler
components are
operating.

Nothing is shown
on control panel,
but boiler is
operating.

Condition

Control is not
receiving power.

Control is not
receiving 120V power.

Occurs when the
communication is lost
from the control to the
display.

Diagnostic

Corrective Action(s)

Check wiring for short
circuit or incorrect
wiring.

Correct wiring per wiring diagram
including connection of transformer to
the control.

Check transformer
connection to the
control per wiring
diagram. Check for
12V output of
transformer.

Replace transformer if it is receiving
120V, but not outputting 12Vac.

Check service switch
and/or circuit breaker
to boiler turned is on.

Turn on service switch to power boiler.

Is there 120 Volts at
the service switch?

Troubleshoot and correct the power
supply to the manual switch.

Is the ON/OFF
POWER
SWITCH (inside boiler
case) turned on?

Turn ON the manual power switch
inside the boiler case.

Check for 120 volts at
the line voltage
terminal block located
inside the boiler case.

Correct wiring inside the boiler case
using the wiring diagram in this
manual.

Inspect the fuse.
Replace if necessary.

Replace the fuse with proper part
found in the replacement part section
of this manual. If fuse blows again
recheck wiring per diagram.

Check for loose
connections and
proper pin alignment/
engagement on the
Control's plug.

Check for continuity on the wire
harness from the display to the control.
See repair parts section for proper
replacement part.

Cycle power off and on
Replace with new display module. See
using boiler power
repair parts section for proper
switch and check for
replacement part.
operation.

Page 69

The FT Series Wall Mounted, Combination Boiler

SECTION 7. Trouble Shooting
Fault

TEMPERATURE
SENSOR

FLAME FAULT

Condition

Occurs when a
temperature
sensor has
electrically
shorted
(SHORT) or has
become
disconnected
(OPEN).

Occurs when
flame is
detected when
there should be
no flame.

7.2 Suggested Corrective Actions (continued)
Diagnostic

Corrective Action(s)
Check all the temperature readings of
the boiler on the DIAGNOSTICS
- TEMPERATURES menu to determine
if any sensors are currently displayed
as SHORT or OPEN.

Reset using manual
Check wire harness for loose
reset screen on control
connections and pin engagement at
panel. (Power button)
sensor Connection and Control
module.

If problem persists after checking items
above replace Control. Refer to repair
parts section for kit number.

Reset using manual
reset screen on control
panel.
(Power button)

Burner may be operating too hot due
to incorrect combustion. Inspect flame
and conduct combustion test.
Check for flame at burner via flame
current with burner off. Turn boiler off
and watch flame through observation
port. If flame continues after shutdown
replace gas valve.
Check wire harness for loose
connections and pin engagement at
blower.
Connections.

BLOWER FAULT

IGNITION
FAULT

Blower unable
to reach
required speed
or does not
reach 0 RPM
when turned off.

Even if boiler
went through 8
ignitron
attempts, but
cannot detect
flame

Boiler in standby mode and blower not
running. If BLOWER SPEED is not 0
RPM then replace blower.

Reset using manual
reset screen on control
panel.
If blower does not rotate during ignition
(Power button)
sequence check for 120V power at
blower connection. If 120Vac power at
blower motor and it doesn't start
replace blower. Check power at
Control. If 120Vac is not present at
Control when boiler is powered replace
Control.
Dirty burner and/or heat exchanger will
cause high back pressure and poor
ignition.
Visual inspection of flue ways often will
not be able to diagnose condition.
Power off and on.

Check incoming gas pressure with
boiler off and at Max fire. Adjust within
limits on rating label.
Check for flue pipe and intake pipe
restrictions or blockage
Check burner fasteners and gaskets
Check air intake pipe and proper
propane orifice

GAS VALVE
FAULT

The Control has
detected a
problem with it
gas valve
output circuit.

Check wire harness connections
Reset using manual
between gas valve and Control.
reset screen on control
panel.
If lockout re-occurs replace Control.
(Power button)

Page 70

SECTION 8. Maintenance
Regular Maintenance
-	This Manual should be placed in a safe and dry
location near the Combination boiler. Maintenance
instructions should be carried out by the following
guidelines.

Maintenance procedures [ Daily ]
- Check that the boiler casing is closed.
	Check if there is any problem with the Combination
boiler casing and the two upper and lower screws
are tightened well. Combination boiler casing must
be closed while it is running.

WARNING
	To prevent potential severe personal injury,
death or substantial property damage,
remove all contaminated materials.
If contaminants are found:
Remove products immediately from the area.
	In order to check the status of Combination
boiler, call a qualified service technician to
inspect the Combination boiler for possible
damage from acid corrosion.

WARNING
 O NOT store combustible materials, gasoline
D
or any other flammable vapors or liquids near
the Water Heater. Remove them immediately or
store them other places.

8.1 Annual startup & general maintenance
- Check the power source.
Make sure that the power cord is correctly
connected. The main power line is connected to
the manual switch box inside a Combination boiler.
(Power line through the strain relief in the bottom of
the combination boiler casing and fix it.)
- Check the status of the control panel
Check status of the power supply. Please check for
any debris on the button.

Maintenance procedures [ Monthly ]
- Check the vent pipe.
Visually inspect the flue gas vent piping for detecting
any signs of blockage, leakage or deterioration
of the piping. Please contact a qualified service
technician immediately if you find any problem.
- Check the air inlet pipe.
Visually inspect the air inlet to be sure it is
unobstructed. Inspect entire length of air piping
for ensuring that piping is intact and all joints
are properly sealed. Call your qualified service
technician if you notice any problems.
- Check the relief valve.
Inspect the Combination boiler relief valve and
the relief valve discharge pipe for any signs
of weeping or leakage. If the relief valve often
weeps, immediately contact your qualified service
technician for inspecting the Combination boiler and
system.
- Check the condensate outlet.
While the Combination boiler is running, check the
discharge end of the condensate drain tubing.
Make sure that no flue gas is escaping from the
condensate drain tubing.
If flue gas is continuously escaping, it is a serious
problem. Call your qualified service technician for
inspecting the Combination boiler and condensate
line. Also, refill the condensate trap if problem
persists regularly.
- Check the vent terminal screen vent (rodent
screen).
If you encounter a problem of combustion
specifications, visually inspect the terminal screen.
And then replace it with spare parts or clean the
screens.

The FT Series Wall Mounted, Combination Boiler

SECTION 8. Maintenance
- Check the air vent
If the air vent valve seems to work freely without
leaking, replace cap “A” by twisting all the way on.
Loosen cap “A” one turn to allow vent to operate.
If vent does not operate correctly, replace the vent.

AA

Page 71

8.1 Annual startup & general maintenance

seat. If the valve continues to weep, contact your
qualified service technician for inspecting the valve
and system. If water does not flow from the valve
even though you have lifted the lever completely, the
valve or discharge line may be blocked. Shut down
the Combination boiler immediately. Call your qualified
service technician to inspect the combination boiler
and system.
- Check the burner state
You can clean the exterior of burner. However, if you
need to clean the inside of the burner stage, you should
call a qualified service technician.

Maintenance procedures [Every 6 Months]
- Check the boiler piping (gas and water)
Visually inspect for leaks around internal water
piping. Also inspect external water piping,
circulators, relief valve and fittings. Immediately
call a qualified service technician to repair any
leaks. Leaks must be fixed by a qualified service
technician immediately.
Failure to comply with this instruction could result in
severe personal injury, death or substantial property
damage.
- Check the pressure relief valve

WARNING
Leaks must be fixed by a qualified service technician
immediately. Failure to comply with this instruction
could result in severe personal injury, death or substantial property damage. This discharge line must
be installed by a qualified heating
installer or a service technician.
Before proceeding, verify that relief valve outlet has
been piped to a safe place of discharge, avoiding
any possibility of scalding from hot water. If water
flows freely, release the lever and allow the valve
to seat. Watch the end of the relief valve discharge
pipe to ensure that the valve does not weep after
the line has had time to drain. If the valve weeps,
lift the seat again to attempt to clean the valve

Page 72

8.2 Flushing the Combination Boiler

Flushing the Heat Exchanger is a complicated procedure that should only be done by an authorized technician or
licensed professional. Keep in mind that improper maintenance can void your warranty.

1. Disconnect electric power to the combination boiler.
2. Close the shutoff valves on both hot water outlet
and cold water inlet lines. (V1 & V2)

V3

V4 V2
V1

3. Connect one hose “D1” to the valve “V3” and place
the free end in the bucket. Connect one of the
hoses “D3” to the circulation pump outlet and the
cold water inlet line at the valve “V4”. Connect other
hose “D2” to the circulation pump inlet and place
the free end in the bucket.

4. Pour the cleaning solution into the bucket. Place the drain hose
(D1) and the hose (D2) to the pump inlet into the cleaning solution.
5. Open service valves (V3 & V4) on the hot water outlet and cold
water inlet lines.
6. Turn on the circulation pump (Operate the pump and allow the
cleaning solution to circulate through the combination boiler for at
least 1 hour at a rate of 4 gallons per minute.)
7. Rinse the cleaning solution from the combination boiler
as follows:
-R
 emove the free end of the drain hose (D1) from the
bucket.
-C
 lose service valve, (V4), and open shut off valve,
(V2).
Do not open shut off valve, (V1).
- Allow water to flow through the combination boiler for
5 minutes.
- Close shut off valve (V2).

D1
D2

8. Disconnect all hoses.
9. Remove the cold water inlet filter from the combination boiler and clean out any residues.
10. Reinsert the filter and ensure the filter cap is securely tightened.
11. Connect electrical power to the combination boiler.

D3

Page 73

The FT Series Wall Mounted, Combination Boiler

8.3 Draining and Cleaning
1. Place a bucket under the appliance to collect the residual water inside the combination boiler.
2. Press the Power button on the front control panel to turn OFF the electrical power to the combination boiler.
3. Turn off the gas valve.
4. Close water supply valve on the inlet to the appliance. If there is no valve, turn off main water valve.
5. Open the hot water faucets completely.
6. R
 emove the cold water inlet filter and 'CH' return filter.

FTCW140

FTCW199

7. Clean them with a toothbrush and clean running water.

8. To refill the combination boiler, reassemble the filters back into the combination boiler and reverse
steps 6 back to 1.

Page 74

Section 9 – Installation Check
9.1 Quick View
Before Installing

-	Make sure that there is enough space for
installing Water and gas line.
		 Verify vent/air termination is located as required.
-	All models need for propane Conversion which
requires a separate gas conversion manual.

Install Water Piping

-	Boiler loop piping must be sized to the minimums
listed in the Boiler manual. Using smaller piping
will cause performance problems.(page 34)

Install Vent & Air Piping

-	Slide the air inlet pipe and vent pipe into the
Boiler pipe connector.
-	Make sure the terminations are placed as
required in the manual and that air intakes are at
least 12 inches above normal snow line.
-	Refer to the material check list in this guide for a
list of items needed.

	Install Condensate Piping / Tubing &
Components

-	Fill out the material check list in this guide to
ensure you have the tubing or PVC pipe and all
components needed for the condensate piping.
-	Connect internal components that are supplied
with the Boiler.

Install Gas Piping

-	Install a union and shutoff valve.

Wire the Boiler

-	Connect power wiring and control wiring per
boiler manual wiring diagram.(Section 4.19)

Start up, Adjust & Test

-	Follow the Boiler manual instructions to clean
the system if needed, then fill and check water
chemistry.

9.2 Final Check Lists
Final check : Installation Conditions.

• Is the Boiler properly mounted on the wall?
• Is there space for a drain which is close to the
Boiler?
•	Are there any combustible materials near the
Boiler and vent pipe?
•	Is the air supply sufficient for proper operation of
the Boiler?
•	Are the proper service clearances maintained?
•	Is the distance between the Boiler and point of
vent termination minimized?
•	Is the proper distance from windows, doors, and
other intake vents maintained?

Final check : Gas pipe installation

•	Is the gas supply line equipped with a manual
shut off valve?
•	Is the gas supply line a minimum of 3/4˝ inner
diameter?
•	Is the gas supply line length and diameter
adequate to deliver the required BTU’s?
•	Has the gas supply line pressure been
measured?
•	Does the supply gas type match the type
indicated on the boiler rating plate?

Final check: Air/Vent pipe installation

•	Has the Boiler been vented with 3˝ or 2” PVC,
CPVC, Polypropylene or BH Special
		Gas Vent (S636 PVC, CPVC) for Category IV
appliances in accordance with this manual and/or
your local code?
•	Is the vent termination at least 12˝ above the
exterior grade?
•	Is the total vent length within the maximum vent
length restriction?
•	Have you checked the air/vent piping for leaks?
•	Have you properly supported the vent
termination?
•	Are all vent runs properly supported?
•	Is the vent sloped upward toward the vent
termination at a rate of 1/4˝ per foot (2% grade)?

Final check : Condensate drain installation

•	Have you installed a condensate drain line from
the Boiler to a drain or laundry tub?

Final check : Setting the DIP switches

•	Are all DIP switches correctly set on the main
board?

Page 75

The FT Series Wall Mounted, Combination Boiler

9.2 Final Check Lists (continued)
Final check : Connecting the power supply

• Please check that the power is 120V AC.
• Have you checked the polarity of the electrical connection?

Final check : Pressure relief valve

• Have you installed an approved pressure relief valve on the boiler?
• Is the pressure relief valve of CH Plumbing at least 1˝ in diameter?
• Is the pressure relief valve of DHW Plumbing at least 3/4˝ in diameter?
• Have you installed the pressure relief valve on the hot water outlet pipe near the Boiler?

Final check : Burner flames

• The burner flame must be checked periodically for a constant proper blue color.
• If the flame does not appear normal, the burner may need to be cleaned.
• If the burner needs to be cleaned, it must be performed by a qualified service technician.

Sight Glass

Blue flame

SECTION 10. Parts List and Illustrations
FTCW140

16
15

15

16

FT1894

18
19

20

23

29

31
25
26
28

IOM Ref
IOM Ref

00003
00003
00002

15
15
16

00002
00025
00025
00065

16
18
18
19

00065
00028
00028
00010

19
20
20
23

00010
40007
40007
00062

23
25
25
26

00062
50050
50050
00028

26
28
28
29

00028
00248
00248
90175

29
31
31
A1

90175
00042
00042
00107

LAARS Heating Systems

Page 76

A1
33
33
35

Kiturami Fire Tube Drawing Number List
Kiturami Fire Tube Drawing Number List

Part Number Description
Description
Part Number CASING
FT1002
FT1002
FT1010
FT1010
FT1014
FT1014
FT1015

CASINGDuct Assembly
Exhaust
Exhaust
Air
IntakeDuct
DuctAssembly
Assembly
Air Intake Duct Assembly
Control
Control
Air
pressure switch

FT1015
FT1016
FT1016
FT1019

Air pressure
switch
Ignition
transformer
Ignition Panel
transformer
Display

FT1019
FT1021
FT1021
FT1022

Display Panel
Terminal
Block
Terminal
Block
Condensate
Blockage, Air Pressure switch

FT1022
FT1024
FT1024
FT1025

Condensate
Display
coverBlockage,
window Air Pressure switch
Display cover
window
Pressure
gauge

FT1025
FT1027
FT1027
FT1100

Pressure gauge
Condensate
trap cover
Condensate
trap cover
DHW Hydro block
Assembly

FT1100
FT1517
FT1517
FT1519

DHW Outlet
Hydro Pipe
block Assembly
DHW
DHW nipple
Outlet Pipe
DHW

Initials
Initials

Date
Date

Status
Status

S264100062
H850150050
Mascot FT Combination
Boiler

FTCW140

28

FT1024

29
IOM Ref
31

H199990175
H190200003
S419100042

A1
15
33

H190200002
S514100107
S115900025
S311200029

16
35
18
36

S264100065
S419100041

19
38
20
39

S122100010
S193000001
S900140007
S549100150

23
40
25
43

S264100062
S549100145
H850150050
S549100141

26
44
28
45

S325100028
S514100105

29
47
31
A2

S489100248
H199990176
H199990175
S419100040

A1
55
33
56

S419100042

S311200030

FT1025

Air
Intake
Duct Assembly
DHW
nipple
Control
Outlet sensor

FT1015
FT1521
FT1016
FT1115

Air
pressure
switch
DHW
Inlet Pipe
Ignition
transformer
Flow sensor

FT1019
FT1116
FT1021
FT1119

Display
Panel
Mixing valve
Terminal
Block
Flow restrictor

FT1022
FT1120
FT1024
FT1121

Condensate
Blockage, Air Pressure switch
DHW filter mash
Display
cover
window
DHW filter
Cap

FT1025
FT1122
FT1027
FT1200

Pressure
gauge
DHW connector
Condensate
trapAssembly
cover
CH hydro Block

FT1100
FT1526
FT1517
FT1219

DHW
Hydro
block Assembly
CH return
pipe
DHW
Outlet
Pipe
CH return
sensor

DHW
Pump Inlet Pipe
Flow sensor

S317100009

S193000001
S549100166
S549100150
H140240002

40
60
43
62

FT1116
FT1304
FT1119
FT1306

47
65
A2
65-1

FT1122
FT1309
FT1200
FT1310

38

S514100105
S311400021
H199990176
S311400021

S419100040
H130210023

S311200030
S333100033
S549100155
S554100041

S419100039
55

H160320029
S322100020
S419100038
S549100166
H120420007
56
H140240002
S311200026
S311200027
S312100011
H130120199
S314200007
S311400021
S549100134
S311400021
S421200030
H130210023
S514100108
S333100033
S554100041
H160510020
S242100058
S322100020

S549100132

S419100038

CH Assembly A2 S551200026

H120420007
S311200026
S312100011

57

FT1120
FT1307
FT1121
FT1068

Exhaust
DuctPipe
Assembly
DHW Outlet

DHW
3-waynipple
valve
Outlet
sensor
CH supply pipe

HEAT EXCHANGER ASSEMBLY

33
Mixing
valve
Exhaust
Pipe
Flow
restrictor
Exhaust
sensor BK

DHW
filter
mash sensor
Exhaust
overheat
DHW
filter Cap Assembly
Heat Exchanger
DHW
Burnerconnector
Assembly
40
CH
hydro
Assembly
Over heatBlock
Sensor

FT1526
FT1313
FT1219
FT1315

CH
return pipe
Burner
CH
return sensor
Igniter

59
68

FT1222
FT1321

Pump
Air vent

69
60
70

FT1322
FT1304
FT1323
FT1306
FT1324

64
74
65
75

65-1
76
65-4
77

FT1220
FT1316
FT1527
FT1665

FT1307
FT1325
FT1068
FT1327
FT1309
FT1328
FT1310
FT1329

65-6

FT1313
FT1330
FT1315

65-7
83
65-8
83-1

FT1316
FT1405
FT1665
FT1406

68
83-2
69
83-3
70
85
71
85
72

FT1321
FT1409
FT1322
FT1716

FT1323
FT1412N
FT1324
FT1412P
FT1325

36

39

55
65-4
56
65-6
57
65-7
58
65-8

62
71
63
72

Initials

FT1010
FT1519
FT1014
FT1112

FT1521
FT1222
FT1115

44
63
45
64

Pressure gauge

CASING
DHW Hydro block Assembly

38
59
39

S549100145
S311200027
S549100141
H130120199

Display cover
Kiturami
Fire window
Tube Drawing NumberPage
List77

FT1100
FT1002
FT1517

FT1519
FT1220
FT1112
FT1527

S311200029
S419100039
S419100041
H160320029

Condensate Blockage, Air Pressure switch

Part
Number Description
FT1027
Condensate trap cover

35
57
36
58

S514100107
S549100155

59

FT1022

S325100028
KMC#
S489100248

S223100028
S317100009

58

26

35

3-way
Ignitor valve
gasket
CH
supply
Refractory pipe

HEAT
EXCHANGER
ASSEMBLY
CH supply
upper pipe
Exhaust
Pipe
DHW tank
43
Exhaust
sensor
BK
Temperature
sensor
44

Exhaust
Low leveloverheat
sensor sensor
Heat
Assembly
FlameExchanger
detector sensor

47

Burner
Assembly
45 trap
Condensate
Over
heat Sensor
Condensate
trap hose

Burner
Condensate trap connector
Igniter
DHW Assembly

BLOWER & GAS VALVE

Ignitor
Blowergasket
Assembly
Refractory
Blower

Air
vent Gas Mixer
Housing,

CH
supply
pipe
O-Ring,
Fanupper
Sealing
DHW
Orificetank
(natural)

Temperature
sensor
Orifice (propane)
Low level sensor

A1

LAARS Heating Systems

Page 78

FTCW140
Heat Exchanger & Tank
68

65-1

63
70

69

64

71
72

74

75

76

77

62
60

19100040

1200030

9100155

55

FT1526

CH return pipe

FT1219
CH return sensor
56 FT Combination
Mascot
Boiler
FT1220
3-way valve
57

Page 79

FT1527
CH supply pipe
58
FTCW140
Kiturami
Fire Tube Drawing Number List

19100039

60320029

59
IOM Ref

KMC#

49100166
H190200003
40240002

FT1222

Pump
Description
Part Number HEAT
EXCHANGER ASSEMBLY

Initials

CASINGPipe
Exhaust
Exhaust sensor
Duct Assembly
Exhaust
BK

FT1304
FT1002
FT1306
FT1010
FT1307
FT1014
FT1068
FT1015
FT1309
FT1016
FT1310
FT1019
FT1313
FT1021
FT1315
FT1022
FT1316
FT1024
FT1665
FT1025

Air Intakeoverheat
Duct Assembly
Exhaust
sensor
Control
Heat Exchanger Assembly
Air pressure switch
Burner Assembly
Ignition transformer
Over heat Sensor
Display Panel
Burner
Terminal Block
Igniter
Condensate Blockage, Air Pressure switch
Ignitor gasket
Display cover window
Refractory
Pressure gauge

7033

FT1323
FT1517

DHW
DHW tank
Outlet Pipe

7135

FT1324
FT1519

60
Temperature
DHW nipple sensor

7236

FT1112
FT1325

Outlet
sensor
Low
level
sensor

S419100041
14200007

7438

FT1521
FT1327

DHW Inlet
Pipe sensor
Flame
detector

S317100009
49100134
S193000001
21200030

7539
7640

FT1115
FT1328
FT1116
FT1329

Flow sensor trap
Condensate
Mixing valve trap hose
Condensate

7743
44

FT1119
FT1330
FT1120

Flow restrictor
Condensate
trap connector
DHW filter mash

45
83
47
83-1
A2
83-2
55
83-3
56
85
57
85
58
86_1
59
86_2

FT1121

FT1405
FT1122
FT1406
FT1200
FT1409
FT1526
FT1716
FT1219
FT1412N
FT1220
FT1412P
FT1527
FT1728
FT1222
FT1415

86_3
60
86_4
62

FT1416
FT1304
FT1538
FT1306

Gas
valvePipe
Exhaust
Gas
valvesensor
inlet adaptor
Exhaust
BK

FT1418
FT1307

Gas
valveoverheat
BK
Exhaust
sensor

2190040
H130120199

86_5
63
8764

FT1419
FT1068

Gas
(down)Assembly
Heatpipe
Exchanger

S311400021
9100039

8865

FT1420
FT1309

Gas
inletAssembly
adaptor
Burner

60
15
62
16
63
18
64
19
65
20
65-1
23
65-4
25
65-6
26
65-7
28
65-8
29

H190200002
11200027
S115900025
30120199

S264100065
11400021
S223100028
11400021
S122100010
30210023
S900140007
33100033
S264100062
54100041
H850150050

S325100028

22100020
S489100248
19100038
H199990175
20420007
S419100042

11200026
S514100107
S311200029
12100011

S549100150
14100108
S549100145
S549100141
60510020
S514100105
42100058
H199990176

9100132 64
1200026
S311200030
S549100155

S419100040

S419100039
45100008
H160320029
51200001

S549100166

H140240002

S311200027

6831
69A1

63

62

FT1321
FT1027
FT1322
FT1100

Date

Air
vent
Condensate
trap cover
CH
supply
upper
DHW
Hydro
blockpipe
Assembly

65

65-1

65-4

BLOWER & GAS VALVE

65-6

Blower Assembly
DHW connector
Blower
CH hydro Block Assembly

65-7

DHW filter Cap

Housing, Gas Mixer
CH return pipe

O-Ring, Fan Sealing
CH return sensor

Orifice (natural)
3-way valve

Orifice (propane)

CH supply pipe
Gas valve outlet adaptor
Pump
Gas valve O-Ring

HEAT EXCHANGER ASSEMBLY

S311400021

65-1

FT1310

Over heat Sensor

H130210023

65-4

FT1313

Burner

S333100033

65-6

FT1315

Igniter

65-8

Statu

LAARS Heating Systems

Page 80

FTCW140
Blower and Gas Valve
83
83-1

83
89

86-1

84
85
86-2

89

86-3

86-2
86-4

89

86-5

87

89
88

S311200026

71

FT1324

Temperature sensor

FT1325
S312100011
72
Mascot FT Combination Boiler
FT1327
S314200007
74

Low level sensor
Condensate trap

S549100134

75

FT1328

S421200030

76

FT1329

S514100108
KMC#

77
IOM Ref

FT1330

H160510020
H190200003
S242100058

83
15
83-1
16
83-2
18
83-3
19
85
20
85
23
86_1
25
86_2
26
86_3
28

FTCW140

Condensate trap hose
Kiturami
Fire Tube Drawing Number List
Condensate trap connector

Part Number Description
BLOWER & GAS VALVE
CASING
FT1405
Blower Assembly
FT1002

FT1406
FT1010
FT1409
FT1014
FT1716
FT1015
FT1412N
FT1016
FT1412P
FT1019
FT1728
FT1021
FT1415
FT1022
FT1416
FT1024

Exhaust
Blower Duct Assembly

FT1418
FT1027

Gas valve BK
Condensate
trap cover

FT1419
FT1100

Gas pipe
(down)
DHW
Hydro
block Assembly

S419100042
S349100039

87
A1
88
33

FT1420
FT1517

Gas inlet
adaptor
DHW
Outlet
Pipe

S514100107
S551100036

35
89

FT1519
FT1421

DHW
nipple
Packing

S311200029

36

FT1112

Outlet
sensorITEMS
OPTIONAL

S419100041
S323100096

38
90

FT1521
FT1500

DHW
Inlet Pipe
Pressure
Relief Valve
Flow
sensor
Outdoor Temp. Sensor

H190200002

S549100132

S115900025

S551200026

S264100065
S223100028
S122100010

S345100008
S900140007
S551200001
S264100062
H850150050
S325100028
S489100248

S412190040
H199990175

S317100009
S319300014
S193000001
S114200020
S551100036

86_4
29
86_5
31

39
91

FT1538
FT1025

FT1115
FT1501

Air Intake Duct Assembly

Housing, Gas Mixer

Control

O-Ring, Fan Sealing

Air pressure switch

Nozzle (natural)
(natural, NG)
Orifice

Ignition transformer

Orifice
Nozzle (propane)
(propane, LP)

Display Panel

Gas valve outlet adaptor

Terminal Block

Gas valve O-Ring

Condensate Blockage, Air Pressure switch

Gas valve
Display
cover window

Gas valve
inlet adaptor
Pressure
gauge

40
92
89
43
93
44
94
90
45
95
91
47
96
92
A2
97
93
55
98
94
56
99
95
57
100
96
58

FT1116
FT1502
FT1421
FT1119
FT1503
FT1120
FT1504
FT1500
FT1121
FT1505
FT1501
FT1122
FT1506
FT1502
FT1200
FT1507
FT1503
FT1526
FT1508
FT1504
FT1219
FT1509
FT1505
FT1220
FT1510
FT1506
FT1527

S114200021

97
59
98

FT1507
FT1222
FT1508

S531100297
S549100166
S182100094
H140240002

99
60
100
62

FT1509
FT1304
FT1510
FT1306

S311200027

63

FT1307

Exhaust overheat sensor

H130120199

64

FT1068

Heat Exchanger Assembly

S311400021

65

FT1309

Burner Assembly

S311400021

65-1

FT1310

Over heat Sensor

H130210023

65-4

FT1313

Burner

S549100150

S511100118

S549100145
H990050007
S323100096
S549100141

S421200027
S319300014

S514100105

S549100149
S114200020

H199990176

S511100118
S531100247

S419100040

S114200021
H990050007

S311200030

S531100297
S421200027

S549100155

S182100094
S549100149
S419100039

S531100247
H160320029

Page 81

Flame detector sensor

Mixing
valve 3"
Bird Screen

Packing

Flow restrictor

Gas Reducing
Coupling
OPTIONAL
ITEMS

DHW filter mash
Spare Parts
Kit Valve
Pressure
Relief
DHW filter Cap
Condensate
Hose
Outdoor
Temp.
Sensor
DHW connector
Restrictor(5L)
Bird
Screen 3"
CH hydro Block Assembly
WallReducing
Hung Bracket
Gas
Coupling
CH return pipe
Bird Screen
2"
Spare
Parts Kit
CH return sensor
Heat Exchanger
Condensate
HoseLong Bolt
3-way valve
LPG
Gas Nozzle 4.85mm
Restrictor(5L)
CH
supply pipe

Wall Hung Bracket
Pump
Bird Screen
2"
HEAT
EXCHANGER
ASSEMBLY
Heat Exchanger
Long Bolt
Exhaust
Pipe
LPG Gas
Nozzle
Exhaust
sensor
BK4.85mm

Initials

Date

Page 82

FTCW199
FT1894

Page 83

The FT Series Wall Mounted, Combination Boiler

FTCW199
KMC#
H190200003
H190200002
S115900025
S264100065
S223100028
S122100010
S900140007
S264100062
H850150050
S325100028
S489100248
H199990175
S419100042
S514100107
S311200029
S419100041
S317100009
S193000001
S549100150
S549100145
S549100141
S514100105
H199990176
S419100040

S311200030
S549100155
S419100039
H160320029
S549100166
H140240002
S311200027
H130120199
S311400021
S311400021
H130210023

Kiturami Fire Tube Drawing Number List

Part
NumbeDescription
NoRef aars
Description
IOM
Part
Number
1
B-3
15
B-5
16
B-6
18
B-8
19
B-10
B-13
20
B-15
23
15
25
15-1
26
15-2
28
15-3
15-4
29
15-5
31
15-6
A1
15-7
33
16
35
16-1
17
36
18
38
19
39
19-1
40
20
43
21
22
44
23
45
24
47

25

A2
26
55
27
28
56
29
57
30
58
31
59
32
33
34
60
35
62
36
63
37
64
No
65
2
65-1
3
65-4
4

FT1601
FT1614
FT1002
FT1544
FT1010
FT1719
FT1014
FT1545
FT1015
FT1534
FT1016
FT1547
FT1814
FT1019
FT1002
FT1021
FT1603
FT1022
FT1604
FT1024
FT1605
FT1025
FT1606
FT1607
FT1027
FT1608
FT1100
FT1609
FT1517
FT1800
FT1519
FT1611
FT1112
FT1321
FT1548
FT1521
FT1797
FT1115
FT1013
FT1116
FT1804
FT1119
FT1751
FT1801
FT1120
FT1752
FT1121
ST1006
FT1122
FT1014
FT1200
FT1795
FT1526
FT1020
FT1827
FT1219
FT1022
FT1220
FT1790
FT1527
FT1024
FT1222
FT1771
FT1055
FT1791
FT1304
FT1057
FT1306
FT1633
FT1307
FT1025

Casing
S
Initials
Date
(Green=Shared Part, Blue=175/199 Part)

O-Ring
P7
CASING
M4*8
TH+Duct
tapping
Exhaust
Assembly
M4*10 FH+ tapping
Air Intake Duct Assembly
M4*10 TH+ tapping
Control
M4*10 Plat Head
Air pressure
switch
M4*12
TH+ M/S
Ignition
transformer
M4*16
TH+
tapping
M4*20
TH+
tapping
Display
Panel
Exhaust
Vent
Duct Ass'y
Terminal Block
Stainless band Φ100
Condensate Blockage, Air Pressure switch
Exhaust packing
Display vent
coverduct
window
Exhaust

Pressure
gaugecap
Exhaust
testing
O-Ring
P85 trap cover
Condensate
Exhust adaptor
DHW Hydro block Assembly
O-Ring P75
DHW Outlet Pipe
Air Inlet Duct Ass'y
DHW
Air
inletnipple
Duct
Outlet
sensor
Air vent
Air
ventInlet
rubber
DHW
Pipecap
Gasket BK
Flow sensor
Safety valve rubber pad
Mixing valve
Air Pressure sensor
Flow restrictor
Control
BK
DHW filter
mash
Control
Display
(P-920C)
Panel
DHWBK
filter Cap
Ignition transformer
DHW connector

PCB(NGTX-920CP)

CH hydro Block Assembly
Bracket
CH return
pipe
Power
switch
Terminal
Blocks
CH return
sensor
Condensate
3-way valveblockage, Air press switch
Front cover
CH supply pipe
Display cover window
Pump
Intake/exhaust
sealing pad
HEATmount
EXCHANGER
ASSEMBLY
Wall
bracket (top)
Casing
ASS'Y
Exhaust
Pipe
Wall
mount
bracket
Exhaust
sensor
BK(lower)
Wire adaptor
Exhaust overheat sensor
Pressure gauge
FT1068
Heat Exchanger Assembly
aars Part NumbeDescription
FT1309
Burner Assembly
FT1685
O-Ring
P15Sensor
FT1310
Over heat
FT1643
O-Ring P16
FT1313
Burner
FT1687
O-Ring P18

FT1751 ?? - Kiturami to confirm if item 21

FT1751 ?? - Kiturami to confirm if item 21

Block Ass’y
(Green=Shared Part, Blue=175/199 Part)

Page 84

FTCW199

DHW Assembly A1

CH Assembly A2

FT1024
31
Display
cover window
FT1055
33
Wall
FT1790
30
Frontmount
cover bracket (top)
FT1771
32
Intake/exhaust
sealing pad
FT1791
34
Casing
ASS'Y
FT1024
31 Wall Mounted,
Display
cover window
Page 85
The FT Series
Combination
Boiler
FT1055
33
Wall
mount
bracket
(top)
FT1057
35
Wall mount bracket
(lower)
FT1771
32
Intake/exhaust
sealing
pad
FT1791
34
Casing
ASS'Y
FT1633
36
Wire
adaptor
FT1055
33
Wall mount
bracket (top)
FT1057
Kiturami
Tube
Drawing Number List
35
Wall mountFire
bracket
(lower)
FTCW199
FT1025
37
Pressure
gauge
FT1791
34
Casing ASS'Y
FT1633
36
Wire adaptor
Block
Ass’y
Initials
Date
FT1057
35
mount bracket (lower)
PartNumber
NumbeWall
No
Description
Description
KMC#
IOM
FT1025
37 RefaarsPart
Pressure
gauge
(Green=Shared Part, Blue=175/199 Par
FT1633
36
Wire adaptor
Block Ass’y
FT1685
2
P15
CASING
aars FT1025
Part NumbeO-Ring
No
Description
37
Pressure
gauge
(Green=Shared Part, Blue=175/199 Par
FT1643
315
P16
FT1002 O-Ring
H190200003
Exhaust
Duct
Assembly
Block Ass’y
2
O-Ring
aars FT1685
Part NumbeDescription
No
FT1687
4
O-Ring P15
P18
(Green=Shared Part, Blue=175/199 Par
FT1010
H190200002
16
Air Intake Duct Assembly
FT1643
3
O-Ring
FT1513
5
O-Ring P16
P20
FT1685
2
O-Ring
P15
FT1014 O-Ring
Control
FT1687
4
P18
S115900025
18
FT1644
6
O-Ring
FT1643
3
O-Ring P22
P16
FT1513
5
P20 switch
FT1015 O-Ring
Air pressure
S264100065
19
FT1515
7
O-Ring
FT1687
4
O-Ring P22A
P18
FT1644
6
O-Ring
P22
FT1516
FT1016
Ignition
transformer
8
O-Ring
S223100028
20
FT1513
5
O-Ring P25
P20
FT1515
7
O-Ring
P22A
FT1646
10
3/4"
packing
FT1019 O-Ring
Display
Panel
FT1644
623
P22
S122100010
FT1516
8
O-Ring
P25
FT1691
11
1"
packing
FT1515
7
P22A
FT1021 O-Ring
Terminal
Block
S900140007
25
FT1646
10
3/4"
packing
FT1208
12
Water
flow
FT1516
8
O-Ring P25sensor clip
FT1022 1"Condensate
Blockage, Air Pressure switch
FT1691
11
packing
S264100062
26
FT1107
13
Pipe
clip
FT1646
10
3/4" packing
FT1208
12
flow
sensor
clip
FT1024 Water
Display
cover
window
FT1108
H850150050
28
14
Pump
clip
FT1691
11
1"
packing
FT1107
13
Pipe clip
FT1520
B-4
TH+
FT1025 M4*8
Pressure
gauge clip
S325100028
29
FT1208
12
Water
flowM/S
sensor
FT1108
14
Pump
clip
FT1817
B-16
PH.PW+trap
Selfcover
Tapping
FT1107
13
Pipe
clip
FT1027 M4*9
Condensate
S489100248
31
FT1520
B-4
M4*8
TH+
M/S
FT1805
38
DHW
pipe
FT1108
14
Pump
clip
H199990175
FT1100
DHW
Hydro block
Assembly
A1Assembly
FT1817
DHW
A1
B-16
M4*9
PH.PW+
Self Tapping
FT1518
39
DHW TH+
‘T’ pipe
FT1520
B-4
M4*8
M/S
S419100042
FT1517 DHW
DHWpipe
Outlet Pipe
FT1805
38
33
FT1519
40
DHW
nipple Self Tapping
FT1817
B-16
M4*9 PH.PW+
FT1518
39
pipe
FT1519 DHW
DHW‘T’
nipple
FT1112
S514100107
35
41
Outlet
sensor
FT1805
38
DHW pipe
FT1519
40
DHW
nipple
FT1806
42
inlet
pipe
S311200029
FT1112 DHW
Outlet
36
FT1518
39
DHW
‘T’sensor
pipe
FT1112
41
Outlet
sensor
FT1115
43
Flow
sensor
FT1519
40
S419100041
FT1521 DHW
DHWnipple
Inlet Pipe
38
FT1806
42
DHW
inlet
pipe
FT1116
44
Mixing
valve
FT1112
41
Outlet
sensor
S317100009
FT1115
Flow
sensor
39
FT1115
43
Flow
sensorblock
FT1522
45
DHW
FT1806
42
DHW inlet
inlet pipe
FT1116
S193000001
FT1116
Mixing
valve
44
Mixing
valve
40
FT1549
46
DHW
inlet
filter body
FT1115
43
Flow sensor
FT1522
45
DHW
inlet
block
S549100150
FT1119
Flow
restrictor
FT1822
47
Flow
restrictor
43
FT1116
44
Mixing valve
FT1549
46
DHW inlet
filter
body
FT1120
48
mash
FT1120 DHW
DHWinlet
filter
mash
FT1522
45
DHW
inlet
block
S549100145
44
FT1822
47
Flow restrictor
FT1121
49
Cap
FT1549
46
DHW
inlet
filter
S549100141
FT1121 DHW
DHWfilter
filter
Capbody
45
FT1120
48
DHW
inlet
mash
FT1122
50
DHWrestrictor
nipple
FT1822
47
Flow
S514100105
FT1122 DHW
DHWfilter
connector
47
FT1121
49
Cap
FT1121
51
Return
block
cap
FT1120
48
DHW inlet
mash
FT1122
50
DHW
nipple
H199990176
FT1200
CH
hydro
Block
Assembly
A2
FT1523
52
Return
block
FT1121
49
DHW filter
Cap
FT1121
51
Return
block cap
FT1526
CH
S419100040
FT1524
‘R’
clipreturn
55
CH53
Assembly
A2
FT1122
50
DHW
nipplepipe
FT1523
52
Return
block
FT1525
54
Pressure
gauge
FT1219 Return
CH return
sensor
FT1121
51
block
capclip
S311200030
56
FT1524
53
‘R’
clip
FT1215
55
CH
return,
supply
connector
FT1523
52
FT1220 Return
3-wayblock
valve
S549100155
57
FT1525
54
Pressure
gauge
clip
FT1216
56
CHclip
filter
FT1524
53
S419100039
FT1527 ‘R’
CH
supply
pipe connector
FT1215
55
CH
return,
supply
58
FT1217
57
U
Clip
FT1525
54
Pressure
gauge clip
FT1216
56
filter
FT1222 CH
Pump
H160320029
59
FT1807
58
CH
return pipe
FT1215
55
CH
return,
supply connector
FT1217
57
U
Clip
FT1219
59
CH
return
sensor
HEAT
FT1216
56
CH
filterEXCHANGER ASSEMBLY
FT1807
58
CH
return pipe
FT1220
60
3way
S549100166
FT1304 U Exhaust
FT1217
57
ClipvalvePipe
60
FT1219
59
CH
sensor
FT1808
61
CH return
supply
pipe
FT1807
58
return pipe
FT1306 CH
Exhaust
sensor BK
H140240002
62
FT1220
60
3way
valve
FT1798
62
Pump
(topsensor
case+bk)
FT1219
59
CH
return
FT1307 CH
Exhaust
sensor
S311200027
FT1808
61
supply overheat
pipe
63
Heat Exchanger & Tank
FT1220
60
3way
valve
aars
Part
Numbe
No
Description
FT1798
62
Pump
(top
case+bk)
FT1068
Heat
Exchanger
Assembly
H130120199
(Green=Shared Part, Blue=175/199 Par
64
FT1808
61
CH supply pipe
Heat Exchanger & Tank
FT1644
6
p22
FT1309
Burner
Assembly
S311400021
Part
NumbeO-Ring
No
Description
65 aars FT1798
62
Pump
(top
case+bk)
(Green=Shared Part, Blue=175/199 Par
FT1646
10
3/4" Packing
FT1310 O-Ring
Over heat
Sensor
S311400021
Heat Exchanger & Tank
65-1
FT1644
6
p22
aars FT1691
Part NumbeDescription
No
11
1" Packing
(Green=Shared Part, Blue=175/199 Par
FT1313 3/4"
Burner
H130210023
FT1646
10
Packing
65-4
FT1062
B-1
M3*6
PH+
M/S
FT1644
6
O-Ring p22
FT1691
11
Packing
FT1315 1"
Igniter
S333100033
FT1063
65-6
B-2
M4*8
BH+ tapping
FT1646
10
3/4" Packing
FT1062
B-1
M3*6 PH+ M/S

Page 86

FTCW199
Heat Exchanger & Tank

C#

0200003

0200002

5900025

4100065

3100028

2100010

0140007

4100062

0150050

5100028

9100248

9990175

9100042

4100107

1200029

9100041

7100009

3000001

9100150

9100145

9100141

4100105

9990176

9100040

1200030

9100155

9100039

0320029

57
U Clip
FT1807
58
CH return pipe
59 Series FT1219
CH return
sensor
The FT
Wall Mounted,
Combination
Boiler
FT1220
60
3way valve
FT1808
61
CH supply pipe

FTCW199
FT1798
62

B-17
20
B-18
23
B-19
25
B-21
26

63
28
64
29
65

31
66
A1
67
68
33
69
35
70
36
71
38
72
39
73
74
40
75
43
76
44
77
45
77-1
47
77-2
77-3
A2
77-4
55
77-5
56
77-6
57
77-7
58
77-8
77-9
59
78

9100166

No
60

0240002

N-2
62
B-4
63
B-9
64
B-22
65
79
65-1
80

1200027

0120199

1400021

1400021

0210023

3100033

4100041

Kiturami
Fire Tube Drawing Number List
Pump (top case+bk)

PartNumber
NumbeDescription
No RefaarsPart
Description
IOM
6
10
15
11
16
B-1
18
B-2
19
B-6

81
65-4
82
65-6
83
65-7
84
65-8
84-1

FT1644
FT1646
FT1002
FT1691
FT1010
FT1062
FT1014
FT1063
FT1015
FT1719
FT1016
FT1816
FT1820
FT1019
FT1815
FT1021

FT1818
FT1022
FT1306
FT1024
FT1784
FT1025
FT1307
FT1027
FT1823
FT1100
FT1825
FT1517
FT1813
FT1793
FT1519
FT1809
FT1112
FT1794
FT1521
FT1324
FT1115
FT1325
FT1116
FT1669
FT1327
FT1119
FT1069
FT1120
FT1792
FT1121
FT1796
FT1122
FT1760
FT1200
FT1824
FT1838
FT1526
FT1763
FT1219
FT1663
FT1220
FT1310
FT1527
FT1764
FT1826
FT1222
FT1783

Heat
Exchanger & Tank Date
Status
Initials
(Green=Shared Part, Blue=175/199 Part)

O-Ring
p22
CASING
3/4"
Packing
Exhaust
Duct Assembly
1" Packing
Air Intake Duct Assembly
M3*6 PH+ M/S
Control
M4*8 BH+ tapping
Air pressure
switch
M4*10
TH+ tapping
Ignition
transformer
M5*10
TH+
M/S
M5*12
BH+
tapping
Display Panel
M5*12 BH+ M/S
Terminal Block
M4*13.5 Wrench Bolt + Spring Washer +
Condensate
Flat
Washer Blockage, Air Pressure switch
Exhaust
Is item 63 or 64 Kiturami Part Number H140240002
Displaysensor
cover BK
window

Exhaust-adaptor
Pressure gauge
Exhaust sensor

Condensate trap cover
Exhaust pipe
DHW
Hydro blockpacking
Assembly
Inner
pipe_bottom
DHW Outlet
Stainless
bandPipe

Need Kiturami Part Number
Is item 63 or 64 Kiturami Part Number H140240002

DHW
BK
DHWtank
nipple
CH
supply
pipe
Outlet sensor (top)
DHW tank ASS'Y
DHW Inlet Pipe
Temperature sensor
Flow
sensor
Low
level
sensor
Mixing
valveBK
Photo
sensor
Photo
Flowsensor
restrictor
Photo sensor cover
DHW filter mash
Heat exchanger ASS'Y
DHW filter Cap
Burner ASS'Y
DHW case(top)
connector
Burner
CH hydro
Block Assembly
Burner
gasket
Burner
CH return pipe
Igniter
CH return sensor
Igniter gasket
3-way valve
Overheat sensor
CH supply
pipe
Burner
case (bottom)
Refractory
Pump FT-175W thru FT-199W
Condensate
trap ASS'Y
HEAT EXCHANGER
ASSEMBLY

aars Part
NumbeDescription
FT1304
Exhaust Pipe
FT1306
FT1074
FT1779
FT1307
FT1076
FT1068
FT1819
FT1309
FT1769
FT1310
FT1770
FT1313
FT1081
FT1082
FT1315
FT1772
FT1316
FT1799
FT1665
FT1803

Page 87

Exhaust
M5
NUT sensor BK
M4*8
TH+ overheat
M/S
Exhaust
sensor
M4*12
M/S Assembly
Heat PH+
Exchanger
M5*15 Wrench Bolt + Flat Washer
Burner Assembly
Fan guide
Over heat
Sensor
Damper
packing
Burner body
Damper
Fan
rubber pad
Igniter
Fan
guide
packing
Ignitor
gasket
Fan ASS'Y
Refractory
Fan

Fan & Gas Valve
(Green=Shared Part, Blue=175/199 Part)

Page 88

FTCW199
Blower and Gas Valve

FT1824
77-3
Burner gasket
FT1838
77-4
Burner
FT1763
Igniter Combination Boiler
Page 89
The FT77-5
Series Wall
Mounted,
FT1663
77-6
Igniter gasket
FT1310
77-7
Overheat sensor
FTCW199
FT1764
77-8
Burner case (bottom)
FT1826
77-9
Refractory FT-175W thru FT-199W
Kiturami
Fire Tube Drawing Number List
FT1783
78
Condensate trap ASS'Y
Status
Date
FanInitials
& Gas Valve
Description
MC#
IOM
PartNumber
NumbeDescription
No RefaarsPart
(Green=Shared Part, Blue=175/199 Part)
CASING
FT1074
N-2
M5
NUT
FT1002 M4*8
FT1779
B-4
TH+ Duct
M/S Assembly
190200003
15
Exhaust
FT1076
B-9
PH+ Duct
M/S Assembly
FT1010 M4*12
190200002
16
Air Intake
FT1819
B-22
M5*15
Wrench
Bolt + Flat Washer
FT1014
Control
115900025
18
FT1769
79
Fan guide
FT1015
Air pressure switch
264100065
19
FT1770
Damper packing
80
FT1016 Damper
Ignitionbody
transformer
223100028
20
FT1081
81
FT1019 Fan
Display
Panel
FT1082
82
rubber
pad
122100010
23
FT1772
83
guide packing
FT1021 Fan
Terminal
Block
900140007
25
FT1799
84
Fan ASS'Y
FT1022
Condensate Blockage, Air Pressure switch
264100062
26
FT1803
84-1
Fan
FT1024
Display cover window
850150050
28
ST1038
84-2
Fan sealing O-ring
FT1025 AGM
Pressure
gauge
325100028
29
FT1773
84-3
VENTURI
FT1774
84-4
O-ring trap cover
FT1027 AGM
Condensate
489100248
31
FT1775
84-5
AGM
BODY
199990175
FT1100
DHW
Hydro block Assembly
A1
FT1603
85
Stainless band Ø100
419100042
FT1517
DHW Outlet Pipe
33
FT1812
86
Air intake hose
FT1519
DHW nipple
514100107
35
FT1777
87
stainless Ø89
311200029
FT1112 AirOutlet
36
FT1821
88
intakesensor
orifice
FT1778
419100041
FT1521 Gas
DHW
Inlet
Pipe
89
valve
ASS'Y
38
FT1728
89-1
valve
outlet
317100009
FT1115 Gas
Flow
sensor
39
FT1727
89-2
Gas valve O-ring
193000001
FT1116
Mixing valve
40
FT1750
89-3
Gas valve
549100150
FT1119
Flow restrictor
43
FT1779
89-4
Gas valve BK
FT1120 1/2"
DHW
filter mash
FT1421
549100145
44
90
Packing
FT1780
91
549100141
FT1121 Orifice
DHW (natural)
filter Cap
45
FT1802
91
Orifice
(propane)
514100105
FT1122
DHW connector
47
FT1810
92
Gas pipe (up)
199990176
FT1200
CH hydro Block Assembly
A2
FT1811
93
Gas pipe (down)
FT1526
CH return pipe
419100040
55
FT1087
94
Gas inlet nipple

11200030

56

FT1219

CH return sensor

49100155

57

FT1220

3-way valve

419100039

58

FT1527

CH supply pipe

160320029

59

FT1222

Pump

HEAT EXCHANGER ASSEMBLY

549100166

60

FT1304

Exhaust Pipe

140240002

62

FT1306

Exhaust sensor BK

311200027

63

FT1307

Exhaust overheat sensor

130120199

64

FT1068

Heat Exchanger Assembly

311400021

65

FT1309

Burner Assembly

311400021

65-1

FT1310

Over heat Sensor

130210023

65-4

FT1313

Burner

333100033

65-6

FT1315

Igniter

554100041

65-7

FT1316

Ignitor gasket

Notes:

For Product and
Service VIDEOS

H2372800E

Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.

Customer Service and Product Support: 800.900.9276 • Fax 800.559.1583

20 Industrial Way, Rochester, NH, USA  03867

1706 Document 1318E



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