Laars FT Series User manual

Installation and Operation Instructions Document 1483A
H2412200A
WARNING
If the information in this manual is not
followed exactly, a re or explosion may
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
ammable 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 re department.
Installation and service must be performed
by a qualied installer, service agency, or gas
supplier.
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualied in hot water boiler and heater installation and maintenance. Improper installation and/or operation
could create carbon monoxide gas in ue gases which could cause serious injury, property damage, or
death. Improper installation and/or operation will void the warranty.
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 inammables 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 qualié
ou par le fournisseur de gaz.
Installation and Operation
Instructions for
Wall-Mounted, Modulating
Gas, Condensing, Heating Only, Boiler
Model FTHW
• Natural Gas (NG) - Factory Conguration
• Propane Gas (LP) - Field-Convertible
100,000 BTU/h
140,000 BTU/h
199,000 BTU/h
THE FT SERIES

TABLE OF CONTENTS
SECTION 1 Introduction
1.1 About this Installation Manual .......................... 3
1.2 Included in the Box ........................................... 4
SECTION 2 Product Characteristics
2.1 Model Nomenclature (model number) .............. 5
2.2 Specications, 100MBH, 140MBH and 199MBH ... 6
2.3 Dimensions ...................................................... 9
2.4 Names of Components .................................. 11
2.5 Product Flow Paths and Characteristics ........ 13
SECTION 3 Safety Regulations
3.1 Safety Symbols .............................................. 14
3.2 Safety Precautions and Proper Use ............... 16
SECTION 4 Installation
NOTE: For Cascading Installations, please refer to
document 1349 ‘Cascading the FT Series Boiler’,
available online.
4.1 Location and Clearances ............................... 17
4.2 Wall Mount Bracket ........................................ 18
4.3 Combustion Air.................................... 19
4.4 Venting (Exhaust) ................................ 21
4.5 General Location Guideline ............................ 22
4.6 Locations for Vent Pipe Terminator ................ 23
4.6.1 Direct Venting Clearances ............................. 23
4.6.2 Venting Requirements in
the Commonwealth of Massachusetts ........... 24
4.7 Air Supply and Vent Connections ................... 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 ............................. 27
4.9 Gas Supply and Piping........................ 30
4.10 Gas Supply Pressure ..................................... 35
4.11 Gas Setup and Adjustment ............................ 36
4.12 High Altitude Installations. ........................... 37
4.13 Natural Gas to Propane Conversion ........... 38
4.14 Plumbing Guidelines........................... 42
4.14.1 External Plumbing and
Water Connection Guidelines ......................... 42
4.14.2 Applicable Backow Preventer ....................... 42
4.14.3 Diaphragm type Expansion tank .................... 42
4.14.4 Zoning with zone valve ................................... 43
4.14.5 Zoning with circulation pumps ........................ 44
4.14.6 Indirect Water Heating .................................... 45
4.14.7 Multiple units using zones pumps
and an indirect for DHW ................................ 46
4.15 Pressure Relief Valve ..................................... 47
4.16 Disposal of Condensate...................... 48
4.17 Electrical Wiring Connections ........................ 49
4.18 DIP Switches .................................................. 50
4.19 Control Board, Electrical Diagram ................. 51
4.20 Ladder Diagram ............................................. 52
4.21 Electrical Connections (table) ........................ 53
SECTION 5 Control Display and Operation
5.1 Control Dial and Buttons ................................ 55
5.2 LCD Overview ............................................... 56
5.3 Operating Mode ............................................. 57
5.4 Setting the Clock ............................................ 58
5.5 CH Set Point Change Mode ........................... 59
5.6 Status Display Mode ...................................... 60
5.7 Installer Mode ................................................. 61
5.8 Storage Mode ................................................ 64
5.9 Outdoor Reset Adjustment ............................. 65
5.10 External Set Point Temperature Control ......... 65
5.11 Error Mode ..................................................... 66
SECTION 6 Error Codes
6.1 Error Code Table ............................................ 67
6.2 Fault Tree Analysis ........................................ 70
SECTION 7 Trouble Shooting
7.1 Diagnostics ..................................................... 72
7.2 Suggested Corrective Actions ........................ 73
SECTION 8 Maintenance
8.1 Annual Startup & General Maintenance ......... 75
8.2 Flushing the Boiler ......................................... 76
8.3 Freeze Protection ........................................... 77
SECTION 9 Installation Check
9.1 Quick View ..................................................... 78
9.2 Final Check Lists ............................................ 79
SECTION 10 Parts
10.1 Parts Lists & Illustrations (model 100) ............ 80
10.2 Parts Lists & Illustrations (model 140) ............ 86
10.3 Parts Lists & Illustrations (model 199) ............ 92

The FT Series Heating Only, Boiler Page 3
For details on Combustion Air
and Venting, See page 19
through to page 27
For details on Gas
Connections, See page 30
through to page 38
For details on Plumbing for Central
Heat and Condensate, See page
42 through to page 48
This manual provides the
information necessary for
the installation, operation,
and maintenance of the
FT Series Wall Mounted,
Heat Only Boiler.
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.
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.
For details on Electrical
Connections,
See page 49 through
to page 53
SECTION 1 Introduction
1.1 About this
Installation Manual
Thermostat
Connection or end
switch of multi-
zone relay panel
CH
Pump External
Input
DHW
Sensor
Cascade
Sensor
Low Water
Cut O󰀨
(jumpered)
Outdoor
Sensor
DHW
Pump
0 - 10V
CH PUMP DHW PUMP
L N GL N G T T O / S
0-10V
INPUT
CASCADE
SYSTEM
SENSOR
DHW TEMP
SENSOR
L W C

Page 4
Item Description Qty
Wall Mounted Boiler
FTHW (all sizes) 1
Installation Instructions and
User’s Manual 1
Condensate Hose 1
Wall Mount Bracket 1
2 types of Wall Anchors 4
Pressure Relief Valve
(CH LINE 3/4 ˝ 30psi)
Model: CASH ACME F-82
1
Mesh Screens
3” 2
1.2 Included in the Box
4
FT1894

The FT Series Heating Only, Boiler Page 5
1.2 Included in the Box (continued)
2 3 4 5 6 7 8 9 10 11 12 13
F T H W A 2 X N
SERIES
FT
H - Heating Only
SIZE
MBTU/h
100
140
199
FUEL
N - Natural
P - Propane
CONFIG
W -Wall Hung
ALTITUDE
A - 0 -10,000 Feet
REVISION
2 - Second
OPTIONS
X - Standard
PUMP
N - with Pump
1
M
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 identies the characteristics of your FT Series Boiler.
Items Descriptions Qty
Propane Conversion Orice 1
O-Ring and Gasket Kit 1
Outdoor Temperature Sensor
with anchors and screws
MODEL NUMBER
Auto Fill Valve and Backow Preventer Valves are NOT included (Field Supplied).

Page 6
Model Name FTHW100
Gas Input Rate MAX 100,000 Btu/h
MIN 20,000 Btu/h
Installation Indoor / Wall hung type
Flue System Sealed Combustion Direct / Single Vent /Sidewall
Vent
Vent Run / Vent Material 2˝(50ft), 3˝(100ft) Schedule 40 CPVC, PP, PVC
Orice Size NG 0.181” (4.6 mm)
LP 0.142” (3.6 mm)
Gas Supply Pressure NG 3.5˝ WC to 10.5˝ WC
LP 8.0˝ WC to 13.0˝ WC
Manifold Pressure
Gas type LP NG
Max re -0.075” WC (+/- 0.01) -0.070” WC (+/- 0.01)
Min re 0.003” WC (+/-0.001) 0.000” WC (+/- 0.001)
Power Supply
Main Supply 120V 60Hz / 4A
Maximum Power
Consumption 160W
Ignition System Direct Electronic Ignition / Automatic Flame
Sensing
Burner System Single Orice Premixed Fuel Modulation Metal
Ceramic Infrared
Gas Valve System Combination modulating (Current proportional)
Dimensions W17 ⅜˝ - H29˝ – D15 ½˝
Shipping Weight 98 lbs (44 kg)
Main Controller / Control Display NGTB-900CP / P-950EH
Water Pressure CH Min 15 ~ Max 30 PSI
Connection Sizes
CH Supply/Return 1 ¼˝ NPT
Gas Inlet 3/4˝ NPT
Materials
Casing Cold Rolled Carbon Steel
Heat Exchanger Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel
Safety Devices
Optical Flame Sensor, Low Water Cut O󰀨 Sensor,
Flue Gas Limit Sensor, Overheat Cut O󰀨 Device,
Gas Valve Operation Detector,
Water Temperature Sensor, Over-heat Limit Switch,
Air Pressure Sensor
2.2 Specications, 100 MBH

The FT Series Heating Only, Boiler Page 7
2.2 Specications, 140 MBH
Model Name FTHW140
Gas Input Rate MAX 140,000 Btu/h
MIN 14,000 Btu/h
Installation Indoor / Wall hung type
Flue System Sealed Combustion Direct / Single Vent /Sidewall
Vent
Vent Run / Vent Material 2˝(50ft), 3˝(100ft) Schedule 40 CPVC, PP, PVC
Orice Size NG
0.244” (6.2 mm)
LP
0.185” (4.7 mm)
Gas Supply Pressure NG 3.5˝ WC to 10.5˝ WC
LP 8.0˝ WC to 13.0˝ WC
Manifold Pressure
Gas type LP NG
Max re
-0.130” WC (+/- 0.01) -0.100” WC (+/- 0.01)
Min re
0.004” WC (+/- 0.001) 0.002” WC (+/- 0.001)
Power Supply
Main Supply 120V 60Hz / 4A
Maximum Power
Consumption 160W
Ignition System Direct Electronic Ignition / Automatic Flame Sensing
Burner System Single Orice Premixed Fuel Modulation Metal
Ceramic Infrared
Gas Valve System Combination modulating (Current proportional)
Dimensions W17 ⅜˝ - H29˝ – D15 ½˝
Shipping Weight 102 lbs (46 kg)
Main Controller / Control Display NGTB-900CP / P-950EH
Water Pressure CH Min 15 ~ Max 30 PSI
Connection Sizes
CH Supply/Return 1 ¼˝ NPT
Gas Inlet 3/4˝ NPT
Materials
Casing Cold Rolled Carbon Steel
Heat Exchanger Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel
Safety Devices
Optical Flame Sensor, Low Water Cut O󰀨 Sensor,
Flue Gas Limit Sensor, Overheat Cut O󰀨 Device,
Gas Valve Operation Detector,
Water Temperature Sensor, Over-heat Limit Switch,
Air Pressure Sensor

Page 8
2.2 Specications, 199 MBH
Model Name FTHW199
Gas Input Rate MAX 199,000 Btu/h
MIN 19,900 Btu/h
Installation Indoor / Wall hung type
Flue System Sealed Combustion Direct / Single Vent / Concentric
Vent
Vent Run / Vent Material 2˝(50ft), 3˝(100ft) Schedule 40 CPVC, PP, PVC
Orice Size NG 0.326˝ (8.3mm)
LP 0.250” (6.35 mm)
Gas Supply Pressure NG 3.5˝ WC to 10.5˝ WC
LP 8.0˝ WC to 13.0˝ WC
Manifold Pressure
Gas type LP NG
Max re -0.169” WC (+/- 0.01) -0.129” WC (+/- 0.01)
Min re -0.015” WC (+/- 0.001) -0.015” WC (+/- 0.001)
Power Supply
Main Supply 120V 60Hz / 4A
Maximum Power
Consumption 160W
Ignition System Direct Electronic Ignition / Automatic Flame Sensing
Burner System Single Orice Premixed Fuel Modulation Metal Ceramic
Infrared
Gas Valve System Combination modulating (Current proportional)
Dimensions W19 ¾” - H32” - D16 ⅞”
Shipping Weight 118 lbs (54 kg)
Main Controller / Control Display NGTB-900CP / P-950EH
Water Pressure Min 15 ~ Max 30 PSI
Connection Sizes
CH Supply/Return 1 ¼˝ NPT
Gas Inlet 3/4˝ NPT
Materials
Casing Cold Rolled Carbon Steel
Heat Exchanger Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel
Safety Devices
Optical Flame Sensor, Low Water Cut O󰀨 Sensor, Flue
Gas Limit Sensor, Overheat Cut O󰀨 Device,
Gas Valve Operation Detector,
Water Temperature Sensor, Over-heat Limit Switch,
Air Pressure Sensor

The FT Series Heating Only, Boiler Page 9
Description Diameter
AAir Intake Collar 3˝
BVent Pipe Collar 3˝
C'CH' Supply 1 ¼˝
D'CH' Return 1 ¼˝
E Gas Inlet 3/4˝
F Condensate Line 1/2˝
FTHW 100 / 140 Heating only boiler
2.3 Dimensions

Page 10
Description Diameter
AAir Intake Collar 3˝
BVent Pipe Collar 3˝
C'CH' Supply 1 ¼˝
D'CH' Return 1 ¼˝
E Gas Inlet 3/4˝
F Condensate Line 1/2˝
9page (199)
16
532.0"
3
7
13
19
AB
4
11
CD
E
F
2.0"
211
7/8”
5/8”
3/4”
1/2”
5/8”
3/4”
7/8”
1/4”
3/4”
1/4”
TOP VIEW
BOTTOM VIEW
FRONT
VIEW
FTHW 199 Heating only boiler
2.3 Dimensions

The FT Series Heating Only, Boiler Page 11
2.4 Names of Components
FTHW 100 / 140 Heating only boiler
NO Name of Component
1 Air Vent (air eliminator)
2 Air Intake Collar
3 Air / Gas Mixing Pipe
4 Gas Inlet Pipe 2
5 Gas Valve
6 Exhaust Duct
7 Low Water Cut O󰀨
8 Overheat Temperature Sensor
9 Flame Detecting Sensor
10 Main PCB
11 Control Display
12 Manual ON/OFF Power Switch
13 Gas Inlet Pipe 1
14 ‘CH’ Internal Pump
15 Gas Inlet Adapter
16 ‘CH’ Supply Adapter
NO Name of Component
17 CH Pressure Gauge
18 ‘CH’ Return Adapter
19 Condensate Adapter
20 Condensate Trap
21 CH Return Temperature Sensor
22 Condensate Air Pressure Switch
23 Terminal Block
24 Heat Exchanger
25 Ignition Transformer
26 Sight Glass
27 Burner Overheat Switch
28 Igniter
29 BLDC Fan (blower)
30 Exhaust Temperature Sensor
31 Air Pressure Sensor
32 Vent Pipe Collar
4 SCREWS
To remove the cover, unthread the 4 phillips head screws.
Keep the screws in a safe place for re-application of cover.
This is typical for all models of the FT.

Page 12
FTHW 199
2
1
31
32
30
29
25
28
27
26
24
17
23
21
22
3
4
5
6
7
10
11
12
13
14
8
9
15 16 2019 18
FTHW 199 Heating Only Boiler
NO Name of Component
1 Air Vent (air eliminator)
2 Air Intake Collar
3 Gas Valve
4 Gas Inlet Pipe 2
5 Air / Gas Mixing Pipe
6 Gas Inlet Pipe 1
7 Exhaust Duct
8 Overheat Temperature Sensor
9 Low Water Cut O󰀨
10 Main PCB
11 Flame Detecting Sensor
12 Control Display
13 Manual ON/OFF Power Switch
14 ‘CH’ Internal Pump
15 Gas Inlet Adapter
16 ‘CH’ Supply Adapter
NO Name of Component
17 CH Pressure Gauge
18 ‘CH’ Return Adapter
19 Condensate Adapter
20 Condensate Trap
21 CH Return Temperature Sensor
22 Condensate Air Pressure Switch
23 Terminal Block
24 Heat Exchanger
25 Ignition Transformer
26 Sight Glass
27 Burner Overheat Switch
28 Igniter
29 BLDC Fan (blower)
30 Exhaust Temperature Sensor
31 Air Pressure Sensor
32 Vent Pipe Collar
2.4 Names of Components (continued)

The FT Series Heating Only, Boiler Page 13
Water in the heating pipe is used for space heating.
2.5 Product Flow Paths and Characteristics
CH Supply
Gas Supply
CH Return
CH = Central Heat
Vent
Combustion
Air
CH Supply CH Return
Gas Input
Combustion Air Vent

Page 14
SECTION 3 Safety Regulations
3.1 Safety Symbols
WARNING 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 denitions 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.
FOR YOUR SAFETY READ BEFORE
OPERATING
If you do not follow these instructions exactly, a
re 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 oor because some gas is heavier than
air and will settle on the oor.
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
re 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 qualied service technician. Force
or attempted repair may result in a re or
explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a qualied
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 certied 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.
WARNING
Cancer and Reproductive Harm.
www.P65WARNINGS.CA.GOV.
as required by the state of California Proposition 65.

The FT Series Heating Only, Boiler Page 15
DANGER
Vapors from ammable liquids will explode and
catch on re. These will cause death or severe
burns.
Do not use or store ammable products such as
gasoline, solvents or adhesives in the same room
or area near the appliance.
Keep ammable 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 oor
Can spread from other rooms to the main burner
by air currents
Do not install the appliance where ammable
products will be stored.
Read and follow boiler warnings and instructions
thoroughly. If owner’s manual is missing, contact
the retailer or manufacturer.
This boiler must be installed by a qualied plumber,
a licensed gas tter, 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 Manufacturer Boiler.
Be aware of the location of the gas shut-o󰀨 valve
and operation method. Close the gas shut-o󰀨 valve
immediately if the appliance is subjected to re,
overheating, ood, physical damage, or any other
damaging condition that might a󰀨ect the operation
of the unit. Boiler must be checked by a qualied
technician before resuming operation.
DO NOT use this Boiler if any part has been under
water. Immediately call a qualied 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 qualied technician if the Boiler needs
repair or maintenance.
Ask your gas supplier for a list of qualied service
providers.
DO NOT use spray paint, hair spray, or any other
ammable 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 ow 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 shuto󰀨
system (41) and an air pressure sensor (44). .
If the error code ‘41’ or ‘44’ occurs, follow the
instructions below.
- First, turn o󰀨 the manual gas valve.
- Make sure that there is no foreign object in the vent
passage or rodent screen.
- If you do not nd any problem, do the following.
- Turn o󰀨 the error state by pressing the power button
of Control Display.
- If the error occurs repeatedly, call your service
technician or gas supplier.

Page 16
3.2 Safety Precautions and Proper Use
Do not use the appliance for any other purpose than
for space heating and hot water heating using an
indirect red tank.
Do not store combustibles or ammable material
such as gasoline near the appliance.
Do not store other items on or near this boiler.
Do not store combustible (ammable) materials
such as papers.
Do not hang clothes on the vent pipe. This may
start a re.
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 qualied service
technician for immediate repair.
Gas leakage test.
Gas supply line must be inspected regularly.
Do not shut o󰀨 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 qualied technician.
Before Operation
1. Check the Gas Type (NG/LP) When using or moving
the unit for the rst 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 insu󰀩cient
water or no water is in the heating
pipes. (valve: always open position)
4. Check the Gas Valve. Check that the manual gas
shut-o󰀨 valve that supplies the FT is opened.
5. Check the area around the appliance and remove any
combustible or ammable materials. Remove laundry
or any other items that are on or near the boiler or
vent pipe.
When in Operation
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.
open
3. Open windows for ventilation.
4. Call a qualied service technician for immediate
repair.
2. Caution for Ventilation
Make sure that there is su󰀩cient inow and outow 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 ue or pipes. They
become extremely hot during operation.
CAUTION
Scalding Risk: Manufacturer strongly recommends the
use of an anti-scald mixing valve at domestic hot water
outlet (tank) to reduce potential for scalding.
Contact Manufacturer for recommended models.
Check with local codes.
__________________________________________
CAUTION
After repair of gas pipeline or gas regulator replacement,
call a qualied contractor for inspection before starting it up.
__________________________________________
WARNING

The FT Series Heating Only, Boiler Page 17
SECTION 4 Installation
NOTE: For Cascading Installations, please refer
to document 1349 ‘Cascading the FT Series
Boiler’, available online.
4.1 Location and Clearances
The FT must be mounted to a suitable wall by a
qualied 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 a󰀨ect
the performance and life expectancy of the boiler and
will void the warranty.
9
23
3
8
3
8
24
60
12
30
Table 1. Minimum Clearances
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
Check before placing the 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 Boiler. Remove any combustible
materials, gasoline and other ammable liquids.
Failure to keep Boiler area clear and free of
combustible materials, gasoline and other ammable
liquids and vapors can result in severe personal
injury, death or substantial property damage.
• The Boiler which has gas control system
components must be protected from any possible
danger during operation and service.
• If new 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.
Provide clearances
• If the boiler was installed in a narrow space or
corner, please ensure that there is su󰀩cient
space for service and maintenance access. For
regular maintenance, gas and water lines must be
accessible.
The boiler must be installed on a wall that can bear it’s
weight.
WARNING
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.
Minimum clearances to combustibles.
to Combustibles and for Service.
Appliance Surface
Clearance from
Combustibles and
Non-combustible
Surfaces
Suggested
Service
Clearance
TOP 9 in (23 cm) 18 in (46 cm)
BACK 0 in (0 cm) 0 in (0 cm)
FRONT 24 in (61 cm) 40 in (101 cm)
SIDE 3 in (7 cm) 8 in (20 cm)
BOTTOM 12 in (30 cm) 24 in (61 cm)

Page 18
4.2 Wall Mount Bracket
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!
• Start by familiarizing yourself to how the
included Wall Mount Bracket hooks underneath
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. Wall Mount
Bracket
Bolts (4) Wall Mount
Bracket
Anchors*
(4)
3" to Top
of Unit
Concrete,
Wood,
or 5/8" Plywood
Hangers (2)
(fastened to the back of unit)
4.2.1 The installation height and location
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 (eld supplied).

The FT Series Heating Only, Boiler Page 19
Table 2. Required Combustion Air Pipe Material.
COMBUSTION AIR INSTALLATION STANDARDS
MATERIAL UNITED STATES CANADA
ABS ANSI/ASTM D1527
PVC, sch 40 ANSI/ASTM D1785 or D2665 Air pipe material must be chosen
CPVC, sch 40 ANSI/ASTM F441 CPVC, sch 40, ANSI/ASTM, Polypropylene
Polypropylene UL1738, ULC S636. based upon the intended application of the boiler.
Single wall galv. steel 26 gauge
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 cross-
sectional 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.
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 conned space.
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 Manufacturer
horizontal wall terminal. When taken from the roof, a
eld-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 5. 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.

Page 20
The FT is standard as a Natural Gas Boiler and
must be converted if propane is the desired gas, unless
specically 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
ow.
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 backow preventer in the cold water
supply line will prevent thermal expansion
backow. Contact the water supplier or local
plumbing inspector for information about how to
control this situation.
If overheating occurs or the gas supply fails to shut
o󰀨, turn o󰀨 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.
CAUTION
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 specied. These instructions shall also
specify that the venting system:
Category I, II and IV boilers must be installed so that
horizontal sections have an upward slope away from
the boiler 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.
NOTICE
For long, trouble free operation, it is critical that the
FT unit has always access to clean combustion air,
either drawn from an inside space (per section 4.3.1)
or external (per section 4.3.2).
• Do NOT allow contaminated indoor air (either by
internal dust, sheet rock, PVC or CPVC pipe debris
dust or similar contamination) to be drawn in through
the air intake connection. If the unit must operate
under job site conditions, always ensure availability
of fresh air and protect the unit accordingly.
• For ducted combustion air from the outdoors,
follow the guidelines provided in Sections 4.6
through 4.8 and make sure that clean air is always
available for combustion.
• During assembly of the air intake system,
make sure that any PVC or CPVC pipe debris due
to cutting pipe is fully removed and all connecting
surfaces are smooth and free of contamination.
AVIS
Les instructions d'installation du système
d'évacuation doivent préciser que les sections
horizontales doivent être supportées pour prévenir
le échissement. Les méthodes et les intervalles
de support doivent être spéciés. 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.
When an existing Cat I appliance is removed or
replaced, the original venting system may no longer
be sized to properly vent the attached appliances.
Under no circumstances should an improperly sized
vent be used. An improperly sized vent may cause
operational and safety problems, and could result in
serious injury, death, or property damage.
CAUTION