Laars MFTHW Installation Manual
Installation and Operation Instructions Document 1342E
Installation and Operation
Instructions for
®
MASCOT
FT
Wall-Mounted, Modulating
Gas, Condensing, Heating Only, Boiler
Model MFTHW
80,000 BTU/hr
100,000 BTU/hr
120,000 BTU/hr
140,000 BTU/hr
199,000 BTU/hr
• Natural Gas (NG) - Factory Conguration
• Propane Gas (LP) - Field-Convertible
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualied 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
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 qualied installer, service agency, or gas
supplier.
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 inammables dans
le à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE
• 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 qualié
ou par le fournisseur de gaz.
GAZ:
H2375000E
LAARS Heating Systems
SECTION 1
TABLE OF CONTENTS
Product Accessories
1.1 Introduction ........................................................... 1
1.2 Included with the Appliance ................................... 1
SECTION 2
Product Characteristics
2.1 Model Nomenclature .............................................2
2.2 Specications ........................................................ 3
2.3 Dimensions ........................................................... 6
2.4 Names of Components ......................................... 8
2.5 Product Flow and Characteristics ....................... 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 .....................................15
4.2 Wall Mount Bracket
4.2.1 Installation Height and Location .................16
4.2.2 Hang the Boiler ..........................................16
4.3 Combustion Air ..................................................... 17
4.3.1 Combustion Air from Room ........................ 17
4.3.2 Ducted Combustion Air .............................. 17
4.4 Venting (exhaust) ................................................. 19
4.5 General Location Guidelines ................................20
4.6 Locations for Vent Pipe Terminator ......................21
4.6.1 Direct Venting Clearances ..........................21
4.6.2 Non-Direct Venting Clearances ..................22
4.6.3 Venting Requirements in Massachusetts ... 23
4.7 Air Supply and Vent Connections at the Appliance . 25
4.7.1 Vent / Air Pipe Lengths ...............................25
4.7.2 Direct Venting .............................................25
4.7.3 Indoor Combustion Air ................................26
4.8 Vent / Air Pipe Termination ...................................27
4.9 Gas Supply and Piping ......................................... 29
4.10 Gas Supply Pressure ..........................................34
4.11 Gas Set Up and Adjustment ................................35
4.12 High Altitude Installations and Orices ................36
4.13 Natural Gas to Propane Conversion ...................37
4.14 Plumbing Guidelines ...........................................39
4.15 Pressure Relief Valve ..........................................46
4.16 Disposal of Condensate ......................................47
4.17 Electrical Wiring Connections .............................48
..............................................16
4.18 DIP Switches .......................................................49
4.19 Control Board, Electrical Diagram ......................50
4.20 Ladder Diagram ..................................................51
4.21 Electrical Connections .........................................52
SECTION 5
Control Display and Operation
5.1 Control Dial and Buttons ......................................54
5.2 LCD Overview ...................................................... 55
5.3 Operating Mode ...................................................56
5.4 Setting the Clock ..................................................57
5.5 CH Set Point Change Mode ................................. 58
5.6 Status Display Mode ............................................59
5.7 Installer Mode .......................................................60
5.8 Storage (Indirect Water Heater) ........................... 63
5.9 Outdoor Reset Adjustment ................................... 64
5.10 External Set Point Temperature Control ...............64
5.11 Error Mode ...........................................................65
SECTION 6
Error Codes
6.1 Error Codes ..........................................................66
6.2 Fault Tree Analysis ...............................................70
SECTION 7
Trouble Shooting
7.1 Diagnostics ........................................................... 71
7.2 Suggested Corrective Actions .............................. 72
SECTION 8
Maintenance
8.1 Annual Startup and General Maintenance ........... 74
8.2 Flushing the Boiler ...............................................76
SECTION 9
Installation Check
9.1 Quick View ...........................................................77
9.2 Final Check Lists ..................................................78
SECTION 10
Parts
10.1 Parts List and Illustrations ...............................80-91
Mascot FT, Heating Only, Boiler
SECTION 1
Product Accessories
1.1 Introduction
This manual provides information necessary for the
installation, operation, and maintenance of the LAARS
Heating Systems Mascot FT Boiler. All application
and installation procedures must be read and reviewed
completely before proceeding with the installation. Consult
the LAARS Heating Systems 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
1.2 Included with the Appliance
Item Description Qty
Page 1
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.
LAARS Wall Mounted,
Boiler
MFTHW (all sizes)
Installation Instructions and
User’s Manual
Condensate Hose
Wall Mount Bracket
2 types of Wall Anchors
1
1
1
1
4
4
Pressure Relief Valve
(CH LINE 3/4˝ 30psi)
Model: CASH ACME F-82
Mesh Screens
3”
1
2
Page 2
1.2 Included with the Appliance (continued)
Items Descriptions Qty
Propane Conversion Orice
80 / 100 / 120 / 140 MBH
O-Ring and Gasket Kit 1
Outdoor Temperature Sensor
with anchors and screws
LAARS Heating Systems
175 / 199 MBH
1
SECTION 2.
Product Characteristics
2.1 Model Nomenclature
The Model Nomenclature is shown on your Rating Plate and consists of a series of letters and numbers
( Nomenclature ) that further identies the characteristics of your Mascot FT.
2 3 4 5 6 7 8 9 10 11 12 13
1
F T H W A 1 X N
M
SERIES
Mascot FT
H - Heating
CONFIG
W - Wall Hung
Figure 1. Model Nomenclature
SIZE
MBTU/h
80
100
120
140
199
FUEL
N -
Natural
P - Propane
ALTITUDE
A - 0 -10,000 Feet
REVISION
1 - First
OPTIONS
X - Standard
N - with Pump
PUMP
Mascot FT, Heating Only, Boiler
2.2 Specications,80MBHand100MBH
Model Name MFTHW80 MFTHW100
Page 3
Gas Input Rate
Installation Indoor / Wall hung type
Flue System
Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP
Orice Size
Gas Supply Pressure
Manifold Pressure
Power Supply
Ignition System
Burner System
MAX 80,000 Btu/h 100,000 Btu/h
MIN 16,000 Btu/h 20,000 Btu/h
Sealed Combustion Direct / Single Vent /Sidewall
NG 0.2”(5.05mm) 0.215˝ (5.45mm)
LP 0.157”(4.0mm) 0.169˝ (4.3mm)
NG 3.5˝ WC to 14.0˝ WC
LP 3.5˝ WC to 14.0˝ WC
Gas type LP NG
Max re
Min re
Main Supply 120V 60Hz / 4A
Maximum Power
Consumption
-0.102˝ WC -0.102˝ WC
0.00˝ WC 0.00˝ WC
Direct Electronic Ignition / Automatic Flame
Single Orice Premixed Fuel Modulation Metal
Vent
160W
Sensing
Ceramic Infrared
Gas Valve System Combination modulating (Current proportional)
Dimensions W17.3˝ - H29.0˝ – D14.9˝
Weight 100 lbs
Main Controller / Control Display NGTB-900CP / P-950EH
Water Pressure CH Min 15 ~ Max 30 PSI
Connection Sizes
Materials
Safety Devices
CH Supply/Return 1 ¼˝ NPT
Gas Inlet 3/4˝ NPT
Casing Cold Rolled Carbon Steel
Heat Exchanger
Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel
Flame Rod, Overheat Cut Off Device, Gas Valve
Operation Detector, Water Temperature Sensor,
Over-heat Limit Switch,
Page 4
2.2 Specications,125MBHand140MBH
Model Name MFTHW120 MFTHW140
LAARS Heating Systems
Gas Input Rate
Installation Indoor / Wall hung type
Flue System
Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP
Orice Size
Gas Supply Pressure
Manifold Pressure
Power Supply
Ignition System Direct Electronic Ignition / Automatic Flame Sensing
MAX 120,000 Btu/h 140,000 Btu/h
MIN 24,000 Btu/h 28,000 Btu/h
Sealed Combustion Direct / Single Vent /Sidewall
NG 0.213˝ (5.4mm) 0.255˝ (6.5mm)
LP 0.173˝ (4.4mm) 0.191˝ (4.85mm)
NG 3.5˝ WC to 14.0˝ WC
LP 3.5˝ WC to 14.0˝ WC
Gas type LP NG
Max re
Min re
Main Supply 120V 60Hz / 4A
Maximum Power
Consumption
-0.216˝ WC -0.216˝ WC
0.00˝ WC 0.00˝ WC
Vent
160W
Burner System
Gas Valve System Combination modulating (Current proportional)
Dimensions W17.3˝ - H29.0˝ – D14.9˝
Weight 100 lbs
Main Controller / Control Display NGTB-900CP / P-950EH
Water Pressure CH Min 15 ~ Max 30 PSI
CH Supply/Return 1 ¼˝ NPT
Connection Sizes
Gas Inlet 3/4˝ NPT
Casing Cold Rolled Carbon Steel
Materials
Heat Exchanger
Safety Devices
Single Orice Premixed Fuel Modulation Metal
Ceramic Infrared
Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel
Flame Rod, Overheat Cut Off Device, Gas Valve
Operation Detector, Water Temperature Sensor,
Over-heat Limit Switch,
Mascot FT, Heating Only, Boiler
2.2 Specications,199MBH
Model Name MFTHW199
Page 5
Gas Input Rate
Installation Indoor / Wall hung type
Flue System Sealed Combustion Direct / Single Vent / Concentric Vent
Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP
Orice Size
Gas Supply Pressure
Manifold Pressure
Power Supply
Ignition System Direct Electronic Ignition / Automatic Flame Sensing
MAX 199,000 Btu/h
MIN 19,900 Btu/h
NG 0.326˝ (8.3mm)
LP 0.244˝ (6.2mm)
NG 3.5˝ WC to 14.0˝ WC
LP 3.5˝ WC to 14.0˝ WC
Gas type
Max re
Min re
Main Supply 120V 60Hz / 4A
Maximum Power
Consumption
LP NG LP NG
-0.169˝ WC -0.129”W.C -0.173˝ WC -0.134˝ WC
-0.015”W.C -0.015”W.C -0.015˝ WC -0.015˝ WC
160W
Burner System
Gas Valve System Combination modulating (Current proportional)
Dimensions W19.6˝ - H32.0˝ – D16.2˝
Weight 110 lbs
Main Controller / Control Display NGTB-900CP / P-950EH
Water Pressure Min 15 ~ Max 30 PSI
CH Supply/Return 1 ¼˝ NPT
Connection Sizes
Gas Inlet 3/4˝ NPT
Casing Cold Rolled Carbon Steel
Materials
Heat Exchanger
Safety Devices
Single Orice Premixed Fuel Modulation Metal Ceramic
Infrared
Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel
Flame Rod, Overheat Cut Off Device, Gas Valve Operation
Detector, Water Temperature Sensor, Over-heat Limit Switch,
Page 6
2.3 Dimensions
LAARS Heating Systems
MFTHW
80/100/120/140
Heating only boiler
Description Diameter
A Air Intake Collar 3˝
B Vent Pipe Collar 3˝
C 'CH' Supply Adapter
D 'CH' Return Adapter
E Gas Inlet Adapter 3/4˝
F Condensate Line 1/2˝
1
1
¼˝
¼˝
Mascot FT, Heating Only, Boiler
2.3 Dimensions
Page 7
MFTHW
Heating only boiler
199
Description Diameter
A Air Intake Collar 3˝
B Vent Pipe Collar 3˝
C 'CH' Supply Adapter
D 'CH' Return Adapter
E Gas Inlet Adapter 3/4˝
F Condensate Line 1/2˝
1
1
¼˝
¼˝
Page 8
2.4 Names of Components
LAARS Heating Systems
MFTHW
80/100
Heating only boiler
4 SCREWS
CONTROL
DISPLAY COVER
(HINGES UPW
ARD)
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 Temperature Sensor
8
OP 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
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 Mascot FT.
NO Name of Component
17
CH Pressure Gauge
18
‘CH’ Return Adapter
19
Condensate Trap
20
Condensate Adapter
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
Mascot FT, Heating Only, Boiler
2.4 Names of Components (continued)
Page 9
MFTHW
120/140
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 Temperature Sensor
8
OP 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 Trap
20
Condensate Adapter
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
Page 10
2.4 Names of Components (continued)
MFTHW
Heating only boiler
199
LAARS Heating Systems
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
OP Sensor
9
Low Water Level Sensor
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 Trap
20
Condensate Adapter
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
Mascot FT, Heating Only, Boiler
Gas
Input
Air Intake
2.5 ProductFlowPathsandCharacteristics
Water in the heating pipe is used for space heating.
Combustion
Air
Page 11
Vent
Hydronic Supply Hydronic Return
Page 12
SECTION 3.
Safety Regulations
3.1 Safety Symbols
LAARS Heating Systems
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.
Laars 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 denitions 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
WARNING
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 qualied 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 qualied
service technician to inspect the appliance and
to replace any part of the control system and
any gas control which has been under water.
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.
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 certied 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.
Mascot FT, Heating Only, Boiler
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 qualied 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.
Page 13
damaging condition that might affect the operation
of the unit. Boiler must be checked by a qualied
technician before resuming operation.
DO NOT use this Boiler if any part has been under
water. Immediately call a qualied 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 qualied technician if the Boiler needs
repair or maintenance.
Ask your gas supplier for a list of qualied 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 shutoff
system.
If the error code ‘41’ occurs, follow the instructions
below.
Proper care is your responsibility. Carefully read and
understand the Operating Information in this manual
before operating the Laars 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 re,
overheating, ood, physical damage, or any other
- 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 nd any problem, do the following.
- Turn off the error state by pressing the power button
of Control Display.
- If the error occurs repeatedly, call your service
technician or gas supplier.
Page 14
3.2 Safety Precautions and Proper Use
LAARS Heating Systems
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 insufcient water
or no water is in the
heating pipes. (valve:
always open position)
open
When in Operation
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 qualied service technician for immediate
repair.
2. Caution for Ventilation
Make sure that there is sufcient inow and outow 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
4. Check the Gas V alve
Check that the manual gas shut-off valve
that supplies the Mascot 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.
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 qualied service technician for
immediate repair.
Gas leakage test.
Gas supply line must be inspected regularly.
WARNING
Do not use the appliance for any other purpose
other than for residential hydronic heating.
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.
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 Display
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 qualied technician.
Mascot FT, Heating Only, Boiler
18
46
3
8
3
8
24
60
12
30
SECTION 4.
Installation
Page 15
WARNING
4.1 Location and Clearances
The Mascot FT must be mounted to a suitable wall by
a qualied 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.
Installations must comply with
• All the local, state, provincial, and national codes,
laws, regulations and ordinances.
• National Fuel Gas Code,
version.
• National Electrical Code.
National Standard of Canada CAN/CSA-B149.1
• A
Check before placing the Boiler
• Always check the connected components which are
near to the heater
Water piping position / Venting adapter / Gas supply
piping / Electrical power / Condensate drain hose.
• Inspect area around Boiler
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.
ANSI Z223.1 – The latest
. The components are below.
. Remove any combustible
Provide clearances
• If the heater was installed in a narrow space
or corner
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 its weight.
, please ensure that there is sufcient
Figure 2. Locating the Appliance.
Minimum clearances to Combustibles.
For installation from
Non-Combustibles and
TOP of appliance
BACK
Combustibles
of appliance
FRONT of appliance
of appliance
SIDE
OM of
BOTT
appliance
Table 1. Minimum Clearances
to Combustibles and for Service.
18 in
(23 cm)
0
in
(0 cm)
24 in
(60 cm)
3 in
(7 cm)
12 in
(30 cm)
Suggested
Service
Clearance
18 in
(46 cm)
0
in
(0 cm)
40 in
(101 cm)
8 in
(20 cm)
24 in
(61 cm)
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 16
4.2 Wall Mount Bracket
• 4.2.1 The installation height and location for your
Mascot 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!
LAARS Heating Systems
to Top
3"
of Unit
Anchors
(4)
*
Concrete,
Wood,
or 5/8" Plywood
• 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 Mascot 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.
Bolts (4)
Hangers (2)
(fastened to the back of unit)
Wall Mount
Bracket
Wall Mount
Bracket
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).
Mascot FT, Heating Only, Boiler
4.3 Combustion Air
Page 17
Mascot 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 Mascot FT unit can take combustion air from the
spaceinwhichitisinstalled,orthecombustionair
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.
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 conned 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 LAARS
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 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 UNITED STATES CANADA
ABS ANSI/ASTM D1527
PVC, sch 40 ANSI/ASTM D1785 or D2665 Ai r p i p e m a t e r i a l m u s t b e c h o s e n
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
Table 2. Required Combustion Air Pipe Material.
Page 18
LAARS Heating Systems
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 specied. 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.
NOTICE
CAUTION
The Mascot FT is standard as a Natural Gas Boiler
and must be converted if propane is the desired gas,
unless specically 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.
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 spéciés. 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.
AVIS
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 backow preventer in the cold water
supply line will prevent thermal expansion
backow. 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
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.
Mascot FT, Heating Only, Boiler
4.4 Venting (Exhaust)
Page 19
DO NOT COMMON VENT MASCOT FT UNITS.
Mascot FT units are never permitted to share a
vent with Category I appliances.
NOTICE
TheuetemperatureoftheMascotFTchanges
dramatically with changes in operating water
temperature.Therefore,itisnecessarytoassessthe
application of the boiler to determine the required
certiedventclass.IftheMascotFTisinstalled
in an application where the ambient temperature
iselevated,and/orinstalledinacloset/alcove,
CPVC,polypropylene,orstainlesssteelmaterialis
required. If the system temperatures are unknown at
thetimeofinstallation,stainless,polypropyleneor
CPVC material is recommended.
The Mascot 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.
WARNING
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.
NE PAS ÉVENT COMMUNE MASCOTTE FT UNITÉS.
Mascotte FT unités ne sont jamais autorisés à
partager un évent Catégorie I avec les appareils.
AVIS
__________________________________________
Use of cellular core PVC (ASTM F891), cellular core
CPVC, or Radel® (polyphenolsulfone) in non-metallic
venting systems is prohibited and that covering non-
metallic vent pipe and ttings with thermal insulation is
prohibited.
_________________________________________
INSTALLATIONS IN CANADA require the use of
ventingmaterialcertiedtoULCS636.AllGas
ventsconnectedtotheMascotFT,plastic,stainless
steelorotherwisemustbecertiedtothisULC
standard. Appropriate selection of vent material is
very important for proper performance and safe
operation of the Mascot FT.
TheuetemperatureoftheMascotFTchanges
dramatically with changes in operating water
temperature.Therefore,itisnecessarytoassess
the application of the boiler to determine the
requiredcertiedventclass.IftheMascotFTis
installed in an application where the outlet water
temperatureexceeds145°F,and/orinstalledina
closet,classIIBorhigherventmaterialisrequired.
If the system temperatures are unknown at the time
ofinstallation,classIIBorhigherventingmaterial
is recommended.
IN CANADA all venting used must meet the
following requirements:
1. ULC-S636certiedandmarked
2. Therst3feetofventingmustbeaccessible
for visual inspection.
3. All components used in the vent system must
befromacertiedmanufacturer.
4 . Vent system components must not be mixed
WARNING
VENTING INSTALLATION STANDARDS
MATERIAL UNITED STATES CANADA
Stainless Steel UL 1738 Venting must be ULC-S636 certied for use as
PVC, sch 40 ANSI/ASTM D1785 venting material. The venting material must be chosen
CPVC, sch 40 ANSI/ASTM F441 based upon the intended application of the boiler.
Polypropylene UL1738 or ULC-S636
Table 3. Required Exhaust Vent Material.
Page 20
LAARS Heating Systems
withalternatemanufacturerscertied
componentsand/orunlistedcomponents.
5. Theventingmustbeinstalledaccording
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 Mascot 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 re, resulting
in severe property damage, personal injury or
death.
Do not interchange vent systems or materials
unless it is specied.
The use of thermal insulation covering pipe and
ttings 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.).
4.5GeneralLocationGuideline
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 ue 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 specically 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.
Mascot FT, Heating Only, Boiler
4.6LocationsforVentPipeTerminator
Page 21
* For clearances not specied 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.
within
US Direct Vent Instal-
lations
* *
*
12 in (30 cm) 36 in (91 cm)
3 ft (91 cm) above if
within 10 ft (3 m) hori-
zontally
* 7 ft (2.13 m)
Canadian Direct Vent
Installations
3 ft (91 cm) within a
height 15 ft (457 cm)
above the meter/
regulator assembly
6 ft (1.83 m)
4.6.1DirectVentingClearances
Description
A
B
C
D
E
F
G
H
I
J
K
L
M
Clearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 12 in (30 cm)
Clearance to window or door that may be opening 12 in (30 cm) 36 in (91 cm)
Clearance to permanently closed window * *
Vertical clearance to ventilated soft located above the terminal
a horizontal distance of 2 feet from the center line of the terminal
Clearance to unventilated soft * *
Clearance to outside corner * *
Clearance to inside corner * *
Clearance to each side of center line extended above meter/
regulator assembly
Clearance to service regulator vent outlet * 3 ft (91 cm)
Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance
Clearance to a mechanical air supply inlet
Clearance above paved sidewalk or paved driveway located on
public property
Clearance under veranda, porch, deck, or balcony * 12 in (30 cm)
Table 4. Direct Vent Clearances
Page 22
4.6.2Non-DirectVenting(SinglePipe)Clearances
Description US Non-Direct Canadian Non-Direct
Clearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 12 in (30 cm)
A
Clearance to window or door that may be opening
B
Clearance to permanently closed window * *
C
Vertical clearance to ventilated soft located above the terminal
within a horizontal distance of 2 feet from the center line of the
D
terminal
Clearance to unventilated soft * *
E
Clearance to outside corner * *
F
Clearance to inside corner * *
G
Clearance to each side of center line extended above meter/
H
regulator assembly
Clearance to service regulator vent outlet * 36 in (91 cm)
I
Clearance to non-mechanical air supply inlet to building or the
J
combustion air inlet to any other appliance
Clearance to a mechanical air supply inlet
K
Clearance above paved sidewalk or paved driveway located on
L
public property
Clearance under veranda, porch, deck, or balcony * 12 in (30 cm)
M
LAARS Heating Systems
48 in (120 cm) below
or to side of opening;
12 in (30 cm) above
opening
* *
*
48 in (120 cm) below
or to side of opening;
12 in (30 cm) above
opening
36 in (91 cm) above
if within 10 ft (3 m)
horizontally
* 7 ft (2.13 m)
36 in (91 cm)
36 in (91 cm) within a
height 15 ft (4.57 m)
above the meter/ regulator assembly
36 in (91 cm)
6 ft (1.83 m)
Table5. Non-Direct Vent Clearances
Mascot FT, Heating Only, Boiler
4.6.3VentingRequirementsinthe
Commonwealth of Massachusetts
Page 23
In Massachusetts the following items are required if
the side-wall exhaust vent termination is less than
seven (7) feet above nished 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 gastter shall observe that a hard-wired carbon
monoxide detector with an alarm battery back-up is
installed on the oor level where the gas appliance
is to be installed. In addition, the installing plumber
or gastter 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 qualied 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 oor 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
certied.
3. Signage. A metal or plastic identication 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 24
LAARS Heating Systems
NOTICE
DO NOT COMMON VENT MASCOT FT UNITS.
Mascot FT units are never permitted to share a
vent with Category I appliances.
Common Vent Test
NOTE: This section does not describe a method for
common venting Mascot FT units. It describes what
must be done when an existing unit is removed from
a common vent system.
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 deciencies 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 overows to the discharge opening. Use the ame
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 modied 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
NOTICE
AVIS
NE PAS ÉVENT COMMUNE MASCOTTE FT UNITÉS.
Mascotte FT unités ne sont jamais autorisés à
partager un évent Catégorie I avec les appareils.
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 amme 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. T out 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 modiée, le système devrait
être modié 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
Mascot FT, Heating Only, Boiler
4.7 Air Supply and Vent Connections at the Appliance
4.7.1Vent/AirPipeLengths
Page 25
Boiler model
MFTHW (all sizes) 100´ (30M) 6
Table6. MaximumVent/AirPipeLengthsforeither3”or2“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
• 5 feet (1.5M) for each additional 2-inch 90-degree elbow
• 4 feet (1.2M) for each additional 2-inch 45-degree elbow
•Thethicknessofthewallventsinstalled:Min4˝~Max20˝
NOTE: The Mascot FT is factory set to
operate using 3” piping for Intake and
Vent. For 3” Pipe vent, the default setting
for DIP 4 is ON. If your installation is
using a 2” vent pipe, DIP Switch 4 must
be in the OFF position.
Refer to Section 4:18
3˝ Combustion Air / Vent Pipe 2˝ Combustion Air / Vent Pipe
Max Elbow Max Max Elbow Max
50´
3” pipe
(15M*)
*
4
4.7.2 Direct Venting
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) eld-supplied plastic
vent piping must comply with CAN/CSA B149.1
(latest edition) and be certied 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 ttings. All plastic components and
specied primers and glues of the certied 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 Laars 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 tting.
- For 2” installations, install a eld supplied 3” to
2” adaptor. Adaptor must be installed in vertical
section of piping only.
2”pipeconnected,usinganadapter
3” to 2”
adapter
is NOT
included.
Page 26
LAARS Heating Systems
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. Provide two openings to allow for circulation of
combustion air as specied by ANSI Z224.1/NFPA 54.
In Canada refer to CAN/CSA B-149.1
NOTE: The Mascot FT needs fresh air for safe operation and
must be installed so there are provisions for adequate
combustion and ventilation air.
Model MFTHW80 MFTHW100 MFTHW120 MFTHW140 MFTHW199
Maximum Input (BTU/H) 80,000 100,000 120,000 140,000 199,000
Indoor make up air is provided,
a minimum free area of 1 in2
per 1,000 BTU/H
2
80 in
13 1/4˝
(W) x 13 1/4˝ (H)
2
100 in
13 1/4˝
(W) x 13 1/4˝ (H)
Table 7. Adequate Free Area
WARNING
• Use of cellular core CPVC, or Radel (polyphenolsulfone)
in venting systems is prohibited.
• Covering non-metallic vent pipe and ttings with thermal
insulation is prohibited.
• Do not obstruct the ow of combustion and ventilated air.
2
120 in
13 1/4˝
(W) x 13 1/4˝ (H)
2
140 in
13 1/4˝
(W) x 13 1/4˝ (H)
2
199 in
13 1/4˝
(W) x 13 1/4˝ (H)
Mascot FT, Heating Only, Boiler
4.8Vent/AirPipeTermination
Page 27
Note : For using more than 1 elbow in your
vent pipe, 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˝
VENT
Vent Termination
1. Rodent Screen Installation
• Install Rodent Screen and Vent Terminal
(additional purchase), see Figure for appropriate
conguration.
• 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)
AIR INLET
Figure 3. Horizontal Vent Termination
• Direct Vent - Sidewall Terminations
Figure 4.
Horizontal Vent Termination (cont)
• Direct Vent - Optional Sidewall
Snorkel Terminations
VENT
AIR INLET
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