NTI Lx150-400, Trinity Lx150, Trinity Lx150E, Trinity Lx200, Trinity Lx400 Installation And Operation Instructions Manual
Trinity Lx
ndicates a hazardous situation which, if not avoided, will
cates a hazardous situation which, if not avoided,
ndicates a hazardous situation
hazardous
ndicates a hazardous situation which, if not avoided,
NEW FEATURES
Warm Weather Shutdown
Model Numbers: Lx150-400
Version Date: 2010-01-01
Second Central Heat Input
Internal Lead-Lag Control
System Sensor
Modulation Sensor Alternatives
INSTALLATION AND OPERATION INSTRUCTIONS FOR
TRINITY LX SERIES
This manual to be read in conjunction with the following documents which
provide specific instructions for controller setup, plumbing and wiring:
Appendix A - Controller and Touchscreen Display Instructions
Appendix B - Boiler Applications: Plumbing and Wiring
Appendix C - Water Heater Applications: Plumbing and Wiring
TABLE OF CONTENTS
INTRODUCTION................................................................................................................3
SPECIFICATIONS ..............................................................................................................6
APPLIANCE LOCATION...................................................................................................7
GENERAL VENTING.......................................................................................................11
VENT/AIR-INTAKE TERMINATION CLEARANCES..................................................20
CONDENSATE DRAIN....................................................................................................24
INSTALLING GAS PIPING..............................................................................................25
LIGHTING THE APPLIANCE .........................................................................................27
GAS VALVE AND BURNER SET-UP ............................................................................29
WIRING SCHEMATICS...................................................................................................34
INSTALLATION CHECKLIST ........................................................................................36
ANNUAL MAINTENANCE AND INSPECTION...........................................................37
PARTS LIST ......................................................................................................................39
TROUBLESHOOTING .....................................................................................................45
®
HAZARD SYMBOLS AND DEFINITIONS
Danger Sign: I
result in serious injury or death.
Warning Sign: Indi
could result in serious injury or death.
Caution Sign plus Safety Alert Symbol: I
which, if not avoided, could result in minor or moderate injury.
Caution Sign without Safety Alert Symbol: Indicates a
situation which, if not avoided, could result in property damage.
Notice Sign: I
could result in property damage.
This Appliance must be installed by a licensed and trained Heating
Technician or the Warranty is Void. Failure to properly install this
unit may result in property damage, serious injury to occupants, or possibly death.
Trinity Lx
Read Before Proceeding
│Installation and Operation Instructions Lx Series
If you do not follow these instructions exactly, a fire or explosion may result causing
property damage, serious injury or death.
FOR YOUR SAFETY, READ BEFORE OPERATING_
A) This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the
burner. Do not try to light the burner by hand.
B) BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch.
• Do not use any phone in your building.
• Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
C) Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or
turn by hand, don't try to repair it, call a qualified service technician. Force or attempted repair may result
in a fire or explosion.
D) Do not use this appliance if any part has been under water. Immediately call a qualified service technician
to inspect the
been under water.
appliance and to replace any part of the
OPERATING INSTRUCTIONS_
control system and any gas control which has
1. STOP! Read the safety information above very carefully.
2. Set the thermostat to lowest setting. Turn off all electric power to the appliance.
3. 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.
4. Turn the manual gas valve to the OFF position. Remove front access panel.
5. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas,
STOP! Follow “B” in the safety information above. If you don't smell gas, go to the next step.
6. Turn the manual gas valve ON. Wait an additional five (5) minutes smelling for gas.
7. Replace the front access panel.
8. Set thermostat to highest setting. Turn on all electric power to the appliance.
9. Ignition sequence is automatic. Combustion will occur after a brief fan purge.
10. If ignition does not occur, follow the instructions “To Turn Off Gas To Appliance” and call your service
technician or gas supplier.
TO TURN OFF GAS TO THE APPLIANCE_
1. STOP! Read the safety information above very carefully.
2. Turn off all electric power to the appliance
3. Turn the manual gas valve to the OFF position
Crystalline Silica - Certain components confined in the combustion chamber may
contain this potential carcinogen. Improper installation, adjustment, alteration, service or
maintenance can cause property damage, serious injury (exposure to hazardous materials) or death. Refer to
Section 12.0 for information on handling instructions and recommended personal protective equipment.
Installation and service must be performed by a qualified installer, service agency or the gas supplier (who must
read and follow the supplied instructions before installing, servicing, or removing this appliance. This appliance
contains materials that have been identified as carcinogenic, or possibly carcinogenic, to humans).
Void Warranty - This Appliance must have water flowing through it whenever the
burner is on or it will damage the unit and void the warranty. Failure to follow these
instructions may result in serious injury or death.
2
Lx Series Installation and Operation Instructions │
1.0 INTRODUCTION
Trinity Lx
Installation and Operation Instructions – These instructions apply to the installation
and operation of Trinity Lx150-400 units and covers instructions that are common-toboth boiler and water heater applications. Troubleshooting instructions for the controller and display are
covered in Appendix A. Appliance-specific plumbing and wiring instructions for Boilers and Water Heaters
are covered in Appendix B and C, respectively. See Table 1-1 for a list of Application Manuals.
Terminology – The following terms in the instruction manuals are used to differentiate between which
instructions are common-to-both and which are appliance-specific. The term "APPLIANCE" applies to both
kinds of water heating appliances (boilers and water heaters) and is used when conveying instructions which
are common-to-both. The term "BOILER" or "WATER HEATER" is used when conveying instructions
which are appliance-specific or specific to one or the other, but not both.
Table 1-1 Instruction Manuals
Appliance Model No.
Installation and Operation Instructions
(Common-to-Both)
Boiler Lx150-400 Trinity Lx Series
Water
Heater
Lx200 & 400 Trinity Lx Series
Application Manuals
(Appliance-Specific)
Appendix B
Boiler Applications
Appendix C
Water Heating Applications
General Installation Requirements
The installation of your NTI Trinity Lx gas appliance must conform to the requirements of this manual, your
local authority, and the National Fuel Gas Code ANSI Z223.1 and or CAN/CGA B149 Installation Codes.
Where required by the Authority, the installation must conform to the standard for “Controls and Safety Devices
for Automatically Fired Boilers ANSI/ASME CSD-1.
This document pertains to the correct installation and operation of NTI Trinity Lx appliance, models numbers
Lx150, Lx150E, Lx200 and Lx400. The instructions detailed in this document supersede any and all previous
instructions provided by NTI, written or otherwise. Each unit is provided with the following:
1) Installation and Operation Instructions Manual for Trinity Lx Series,
2) Appendix A - Controller and Touchscreen Display Instructions for Trinity Lx Series,
3) Appendix B - Boiler Applications: Plumbing and Wiring Instructions,
4) Appendix C - Water Heater Applications: Plumbing and Wiring Instructions, and
5) Natural to LP Conversion Kit *
* The conversion kit is required to convert the appliance so it will safely operate with Propane Gas.
Read and understand this entire document prior to proceeding with the installation of the
Trinity Lx. Failure to follow the instructions outlined in this document will result in
property damage, serious injury or death.
User Responsibilities
This appliance must be installed and serviced by a qualified installer or service technician. This appliance must
be serviced and inspected annually when operating in normal residential applications. Demanding applications
or extreme conditions (i.e. commercial) may require more frequent service and inspection. As the User/Owner of
this equipment, you are responsible for ensuring the maintenance is performed at the required intervals. It is also
the Users responsibility to ensure Vent and Combustion-Air Intake termination is kept clear of ice and snow or
any other obstruction. Failure to follow these instructions could result in fire, serious injury, or death.
Failure to have the appliance properly serviced and inspected on a regular basis may
result in property damage, serious injury or death.
Failure to keep the Vent and Combustion Air Intake clear of ice, snow, and other debris
may result in property damage, serious injury, or death.
3
Trinity Lx
│Installation and Operation Instructions Lx Series
Installer Responsibilities
As the installing technician it is your responsibility to ensure the installation is performed in accordance with this
instruction manual as well as any applicable local or National installation codes. It is also your responsibility to
inform the User/Owner of their obligation with respect to the above description under “User Responsibilities”.
Failure to follow this warning could result in fire, serious injury, or death.
ATTENTION: LIQUEFIED PETROLEUM (LP) PROPANE
The Trinity Lx is factory set to operate with Natural Gas. BEFORE OPERATING WITH PROPANE,
the specified LP Conversion Kit must be installed to convert the appliance so it will operate safely with
LP Propane. Listed below are the relevant NTI appliance models and their corresponding Natural to
LP Propane Conversion Kit number.
Liquefied Petroleum (LP) propane gas is heavier than air; therefore, it is imperative that your Trinity
Lx appliance is not installed in a pit or similar location that will permit heavier than air gas to collect.
Local Codes may require appliances fueled with LP gas be provided with an approved means of
removing unburned gases from the room. Check your local codes for this requirement.
NTI Series Model Number Kit Number
Trinity Lx 150, 150E, 200 82650-1
Trinity Lx 400 83017-1
Failure to use the appropriate Natural to LP Conversion Kit when operating the Trinity
Lx with Propane will result in extremely dangerous burner operation leading to property
damage, serious injury or death. Refer to section titled ATTENTION: LIQUEFIED PETROLEUM (LP)
PROPANE for appliance models and corresponding conversion kit numbers.
Appliance Vent / Air-Intake Piping
The Trinity Lx is a “Direct Vent” appliance requiring a “Special Venting System”. Vent
and Combustion-Air Intake piping must be piped to the outdoors, using the vent material
and rules outlined in these instructions. Failure to follow instructions will result in serious injury or death.
New Features
Second Central Heat Input - The Trinity Lx can be used as a stand alone unit with a lone heat input or with
two heat inputs. To configure units for two heat inputs refer to "Second Central Heat Input vs Multiple Boiler
Application Settings" in Appendix A and "Stand Alone Boiler Applications" in Appendix B.
Internal Lead-Lag Control - The Trinity Lx controller has the internal capacity to stage or lead-lag up to 8
boilers or water heaters configured in a cascade by "daisy chaining" the controller units together. Refer to
"Second Central Heat Input vs Multiple Boiler Application Settings" in Appendix A for controller setup and
Appendix B or C for application specific plumbing and wiring instructions.
Modbus Address - In Lead Lag installations, each controller’s Modbus Address must be
assigned by the installer. Refer to "System Identification & Access" in Appendix A.
System Sensor - Each LX is provided with an optional system water temperature sensor that allows the system
supply or return temperature to be regulated directly. Refer to "Low Voltage Connections" in Appendix B. Not
used for Water Heater Applications.
Modulation Sensor Alternatives - New LX models provide increased accuracy and control of a unit’s water
temperature by allowing installers to select the desired modulation sensor for a given demand. Refer to
"Modulation Sensor" in Appendix B or C.
Warm Weather Shutdown - When enabled, this feature will "prevent" Central Heat operation when the
outdoor temperature exceeds the WWSD setpoint and "permit" Central Heat operation if the outdoor
temperature drops below the WWSD setpoint by 4oF. For set up details refer to the "Warm Weather Shutdown
Configuration" in Appendix A - Controller and Touchscreen Display. Not used for water heater applications.
Natural to LP Propane Conversion Kit_
4
Lx Series Installation and Operation Instructions │
Trinity Lx
IN THE STATE OF MASSACHUSETTS ONLY
(a) For all horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or
in part for residential purposes, including those owned and operated by the Commonwealth and where the side wall
exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not
limited to decks and porches, the following requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS At the time of installation of the side wall
horizontal vented gas fueled equipment, the installing plumber or gas fitter shall observe that a hard wired
carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas
equipment is to be installed and on each additional level of the dwelling, building or structure served by the
equipment. It shall be the responsibility of the property owner to secure the services of qualified licensed
professionals for the 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 detector with alarm and battery back-up may be installed on the next
adjacent floor level.
b. In the event that the requirements of this subdivision can not be met at the time of completion of
installation, the owner shall have a period of 30 days to comply with the above requirements; provided,
however, that during said 30 day period a battery operated carbon monoxide detector with an alarm shall
be installed.
2. APPROVED CARBON MONOXIDE DETECTORS Each carbon monoxide detector as required in accordance
with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
3. SIGNAGE A metal or plastic identification plate shall be permanently mounted to the exterior of the building
at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the
horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than
one-half (1/2) inch in size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”
(plate included with appliance).
4. INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment 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 through 4.
(b) EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2)(a)1 through 4:
1. The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current
edition of NFPA 54 as adopted by the Board; and
2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate
from the dwelling, building or structure used in whole or in part for residential purposes.
(c) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM PROVIDED: When the
manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system design or
venting system components with the equipment, the instructions provided by the manufacturer for installation of the
equipment and the venting system shall include:
1. Detailed instructions for installation of the venting system design or the venting system components; and
2. A complete parts list for the venting system design or venting system.
(d) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED:
When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not provide
the parts for venting the flue gases, but identifies “special venting systems”, the following requirements shall be
satisfied by the manufacturer.
5
Trinity Lx
2.0 SPECIFICATIONS
│Installation and Operation Instructions Lx Series
Table 2-1 Specifications
DESCRIPTION Lx150 Lx150E Lx200 Lx400
CSA Input Modulation
btu/hr [kw]
DOE Heating Capacity
btu/hr [kw]
Net I=B=R Rating
1,3
btu/hr [kw]
DOE AFUE
3
% 95.1 97.0 95.1 94.0
1
1,3
25,000 - 150,000
[7.3 - 44.0]
136,000
[39.8]
118,000
[34.8]
2
25,000 - 150,000
[7.3 - 44.0]
139,000
[40.7]
121,000
[35.4]
25,000 - 199,000
[7.3 - 58.3]
182,000
[53.3]
158,000
[46.3]
75,000 - 399,000
[21.9 - 117]
374,000
[109.6]
325,000
[95.2]
6
Recovery Rating @ 100oF Rise, gal/hr - - 224 450
Water Connections - NPT, in. 1
4
1 1 1-1/4
Gas Connection - NPT, in. 1/2 1/2 1/2 3/4
Vent/Air-Intake Pipe Diameter
Vent/Air-Intake, Max. Length, NG / LP
ft. [m]
Dimensions H x W x D
in. [mm]
Approx. Appliance Weight with Water,
lbs [kg]
Notes:
1
Listed Input and Output ratings are at minimum vent lengths at Sea Level. Numbers will be lower with longer venting
5
, in. [mm]
3 [76] 3 [76] 3 [76] 4 [102] 6 [152]
105 / 50
[32 / 15.2]
29.5 x 17 x 18.5
[749 x 432 x 470]
105 / 50
[32 / 15.2]
29.5 x 17 x 18.5
[749 x 432 x 470]
105 / 50
[32 / 15.2]
29.5 x 17 x 18.5
[749 x 432 x 470]
30
[9.1]
36 x 17 x 24
[915 x 432 x 610]
100 [45.3] 125 [56.7] 125 [56.7] 225 [102]
7
65
7
[19.8]
and/or altitudes greater then 2000 feet [610 m].
2
The maximum output when operating on LP-Gas is limited to 145,000 Btu/hr [42.5 kW].
3
Based on rating plate input capacities, using standard test procedures prescribed by the U.S. Department of Energy.
Ratings have been confirmed by AHRI (GAMA), excluding Lx400.
4
Units sold in Canada are 3/4” NPT.
5
Trinity Lx require a special venting system, use only vent materials and methods detailed in these instructions.
6
Steady-State Efficiency Rating.
7
Max. Length is the same for NG and LP for the Lx400 model only.
This unit requires two people to lift it or property damage and personal injury may result.
High Altitude Operation
The Trinity is designed to operate at its maximum listed capacity in installations less than or equal to 2000 ft
[610 m] above Sea Level. Since the density of air decreases as elevation increases, maximum specified capacity
should be de-rated for elevations above 2000 ft [610 m] in accordance with Table 2-2.
Table 2-2 De-rate % for High Altitudes
Elevations 2000 ft [610 m] 3000 ft [914 m] 4000 ft [1219 m] 4500 ft [1372 m] 5000 ft [1524 m]
In Canada
In USA
Notes:
1
Canada: Altitudes between 2000-4500 ft [610-1372 m], de-rate by 5%. Consult local authorities for de-rating capacities
for altitudes above 4500 ft [1372 m].
2
USA: De-rate capacity by 4% for every 1000 ft [305 m] over 2000 ft [610 m].
Section 9.0 for instructions on adjusting the input to provide proper operation. It is the Installers responsibility
to check the combustion, and to adjust the combustion in accordance to Section 9.0. Failure to follow these
instructions may result in property damage, serious injury, or death.
1
de-rate by 5% de-rate by 5% de-rate by 5% de-rate by 5% de-rate % may vary
2
- de-rate by 4% de-rate by 8% - de-rate by 12%
At elevations greater than 2000 feet, the combustion of the appliance must be checked
with a calibrated combustion analyzer to ensure safe and reliable operation. Consult
6
Front
Top Left Side
Right Side
Rear
Bottom
Lx Series Installation and Operation Instructions │
3.0 APPLIANCE LOCATION
Trinity Lx
In all cases, the Trinity Lx must be installed indoors in a dry location where the ambient temperature must be
maintained above freezing and below 100°F [38°C]. Gas components must be protected from dripping, spraying
water, or rain during operation and servicing. Consider the proximity of system piping, gas and electrical supply,
condensate disposal drain, and proximity to vent termination when determining the best appliance location.
Floor Mounting
The Trinity Lx can be mounted directly on combustible flooring, with the exception of carpeting. Installing the
appliance on carpeting is not permissible. Ensure the appliance is mounted above any anticipated flood level.
Water or flood damaged components must be replaced immediately with new factoryapproved components as failure to do so may result in fire, serious injury, or death.
Appliance Area Ventilation Air Openings
If appliance area clearances are less then the recommended clearances specified in Table 3-1, the appliance area
must be ventilated. Each ventilation air opening must meet the minimum requirements of 1 in2 per 1000 Btu/hr,
but not less then 100 in2. The lower ventilation opening must be located within 6” of the floor while the upper
opening must be located 6” from the top of the space.
Closet Installations
For closet installations, it is necessary to provide two ventilation air openings as shown in Figure 3-1(a) and (b),
each providing a minimum area equal to 1 in2 per 1000 Btu/hr, but not less then 100 in2 and within 6” of the top
and bottom of the closet door. All Vent and Air-Intake piping within the closet must be CPVC for both Canada
and the US. See Table 3-1 for Minimum and Recommended Clearances.
Alcove Installations
Alcove installations have the same minimum clearances as closet installations, except the front must be
completely open to the room at a distance no greater then 18” [457 mm] from the front of the appliance and the
room is at least three (3) times the size of the alcove. Provided these conditions are met, the appliance requires
no extra ventilation air openings to the space. See Table 3-1 for Minimum and Recommended Clearances.
Residential Garage Installations
When installed in a residential garage, mount the appliance a minimum of 18” [457 mm] above the floor. Locate
or protect the appliance so it cannot be damaged by a moving vehicle. Check with your local authorities for
other possible regulations pertaining to the installation of an appliance in a garage.
Wall Mounting Installations (Optional)
Each unit is shipped with wall mounting brackets to provide installers with the option of wall mounting the
appliance. Refer to Figures 3-2(a) and 3-2(b) for instructions and illustrations on wall mounting the various
models. Note that Water Heaters require "Mandatory Wall Mounting Protection". Refer to Section 1.0 in
Appendix C, "Water Heater Applications: Plumbing & Wiring Instructions" for further details.
Table 3-1 Minimum Clearances for Installation and Service
Model No. Clearances
Trinity Lx150-200
Trinity Lx400
Notes:
1
6” if surface is removable allowing 24” [610 mm] clearance (i.e. closet installation). See Ventilation Air Opening
dimensions in Figure 3-1.
2
Clearances can be as low as 12” [305 mm] if the right side has a clearance of 24” [610 mm].
3
Water Heaters require a minimum clearance of 36” [915 mm] in front for burner access (Lx200 and Lx400 only).
Minimum
Recommended 24 [610] 24 [610] 24 [610]
Minimum 24 [610]
Recommended 24 [610] 24 [610] 24 [610]
24 [610]
1,3
1,3
Dimensions - inches [mm]
12 [305] 12 [305] 4 [102] 0 0
2
4 [102] 0 0
12 [305] 12 [305] 12 [305] 0 0
2
12 [305] 0 0
7
Trinity Lx
1” [25 mm] clearance for
hot water and vent pipes
│Installation and Operation Instructions Lx Series
Figure 3-1(a) Lx150-200 Models
Closet Installation, Minimum Clearances
Piping must be CPVC
Top 12” [305 mm]
6” [152 mm] max. above vent opening
Ventilation Air Openings
are not required if the
appliance area meets
the listed Recommended
Clearances in Table 3-1.
Front 6” [152 mm] - Boilers
Front 36” [915 mm] - Water Heaters
Closet Installation, Minimum Clearances
Figure 3-1(b) Lx400 Model
Left Side 12” [305 mm]
Piping must be CPVC
1” [25 mm] clearance for
Top 12” [305 mm]
hot water and vent pipes
Ventilation Air Opening
1 in2 per 1000 Btu/hr, min. 100 in2
Removable Surface or Closet Door
Ventilation Air Opening
1 in2 per 1000 Btu/hr, min. 100 in2
6” [152 mm] max. below vent opening
Right Side 4” [102 mm]
Ventilation Air Openings
are not required if the
appliance area meets
the listed Recommended
Clearances in Table 3-1.
Front 6” [152 mm] - Boilers
Front 36” [915 mm] - Water Heaters
Closet/alcove installations in US and Canada require approved CPVC vent pipe, fittings,
cements and primers (Table 4-3). Failure to comply may result in damage or serious injury.
8
6” [152 mm] max. above vent opening
Ventilation Air Opening
1 in2 per 1000 Btu/hr, min. 100 in2
Removable Surface or Closet Door
Ventilation Air Opening
1 in2 per 1000 Btu/hr, min. 100 in2
6” [152 mm] max. below vent opening
Right Side 12” [305 mm]
Left Side 12” [305 mm]
Lx Series Installation and Operation Instructions │
may
Figure 3-2(a) Lx150-200 Models
Remove the upper wall mount bracket from the
back of the appliance.
Wall Mounting Installations
Failure to follow instructions
result in fire, serious injury, or death.
Trinity Lx
Secure the upper wall mount bracket to a solid
wall using field supplied lag screws (anchors
when mounting on a concrete wall) that are
adequate to support the weight of the
appliance. Ensure the bracket is mounted in
the level position. Refer to Table 2-1
Specifications for appliance weight.
Mount the appliance to the bracket by aligning
the slots in the back of the appliance with the
hooks protruding from the wall bracket. The
top of the slots must rest at the bottom of the
groove in the hooks of the wall mount bracket.
Pull the bottom of the unit away from the wall
to allow the installation of the lower wall
mount bracket (included with appliance). The
bracket will snap into place using the slots
provided in the bottom of the unit (ensure the
snaps lock into place, once installed the bracket
should not be easily removed).
Water Heaters require "Mandatory Wall Mounting Protection". Refer to Section 1.0 in
Appendix C, "Water Heater Applications: Plumbing & Wiring Instructions".
This unit requires two people to lift it
or damage and injury may result.
Ensure that the top of each
slot rests on the bottom of the
grooves in the wall bracket.
9
may
it
Trinity Lx
While leaving the upper bracket intact (A),
remove the wall mount bracket attached to the
bottom-back of the appliance (B). Save the
mounting hardware for Step 4.
Secure the wall mount bracket, removed from
the bottom of the boiler in Step 1, to a solid
wall using field supplied lag screws (anchors
when mounting to a concrete wall) that are
adequate to support the weight of the appliance
(refer to Table 2-1 Specifications). Ensure the
wall mount bracket is mounted level and flush
to the wall with mounting holes on the bottom,
flange pointed upward and angled away from
the wall.
Mount the appliance to the wall by aligning the
upper bracket (A) with the wall mount bracket
(B). Slide the upper bracket down over the
wall mount bracket until it hooks.
Once the appliance is resting securely on the
upper bracket, secure the bottom bracket to the
underside of the appliance using the mounting
hardware removed in Step 1; then, anchor the
bottom bracket to the wall as shown.
│Installation and Operation Instructions Lx Series
Figure 3-2(b) Lx400 Model
Wall Mounting Installations
B
Failure to follow instructions
result in fire, serious injury, or death.
This unit requires two people to lift
or damage and injury may result.
A
B
Ensure that the
upper bracket
on the back of
the appliance
(A) slides down
over the wall
mount bracket
(B) and rests
securely on it.
Water Heaters require "Mandatory Wall Mounting Protection". Refer to Section 1.0 in
Appendix C, "Water Heater Applications: Plumbing & Wiring Instructions".
B
A
10
Lx Series Installation and Operation Instructions │
4.0 GENERAL VENTING
The Trinity Lx is a “Direct Vent” appliance requiring a “Special Venting System” designed for pressurized
venting. Both the Vent and Air-Intake piping must be piped to the outdoors, using the vent material and rules
outlined in this section. Under no conditions may this unit vent gases into a masonry chimney, unless it is
vacant, and utilizes the approved venting material and rules described in this section. Installations must comply
with the National Fuel Gas Code, ANSI Z223.1 (U.S.) or CSA B149.1 (Canada) and local requirements.
Vent and Air-Intake to be piped separately. The Trinity Lx cannot share a common vent or
air-intake with multiple appliances. Failure to comply will result in serious injury or death.
Combustion Air-Intake Contamination
Be careful not to locate the Air-Intake termination in an area where contaminants can be drawn in and used for
combustion. Combustion air containing dust, debris or air-borne contaminants will drastically increase the
required maintenance and may cause a corrosive reaction in the Heat Exchanger which could result in premature
failure, fire, serious injury, or death. See Table 4-1 for a list of areas to avoid when terminating air-intake piping:
Table 4-1 Corrosive Products and Contaminant Sources
Products to Avoid Contaminated Sources to Avoid
Antistatic fabric softeners, bleaches, detergents, cleaners Laundry facilities
Perchloroethylene (PCE), hydrocarbon based cleaners Dry cleaning facilities
Chemical fertilizer, herbicides/pesticides, dust, methane gas Farms or areas with livestock and manure
Paint or varnish removers, cements or glues, sawdust Wood working or furniture refinishing shops
Water chlorination chemicals (chloride, fluoride) Swimming pools, hot tubs
Solvents, cutting oils, fiberglass, cleaning solvents Auto body or metal working shops
Refrigerant charge with CFC or HCFC Refrigerant repair shops
Permanent wave solutions Beauty shops
Fixer, hydrochloric acid (muriatic acid), bromide, iodine Photo labs, chemical / plastics processing plants
Cement powder, crack fill dust, cellulose, fiber based insulation Concrete plant or construction site
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this
or any other appliance. Failure to follow instructions may result in serious injury or death.
Flammable Solvents and Plastic Piping
Due to the extremely flammable characteristics of most glues, cements, solvents and primers used in the process
of joining plastic vent and air-inlet pipe, explosive solvent vapors must be evacuated from the vent and air-intake
prior to start-up. Avoid using excess cement or primer that may lead to pooling inside the pipe assembly. Freshly
assembled piping assembly should be allowed to cure for a minimum of 8 hours before applying power to the gas
fired appliance. Refer to Mandatory Pre-commissioning Procedure for Plastic Venting in Section 4.0.
Flammable Cements and Primers – It is the installers’ responsibility to familiarize
themselves with the hazards associated with explosive solvents and to take all precautions
to reduce these risks. Failure to follow these instructions can cause explosions, property damage, injury or death.
Near Appliance Vent/Air-Intake Piping
Each Trinity Lx is equipped with a short piece of approved CPVC vent pipe. Insert one end into the appliance
flue outlet adapter and cement the other to field venting (see Table 4-3 for approved venting material). The
CPVC vent pipe should extend fully into the appliance flue outlet adapter (see Table 4-2). DO NOT insert PVC
pipe directly into the flue outlet connection as it can deform from the clamping force of the gear clamp. Ensure
that the venting system does not apply a load or strain on the appliance flue outlet adapter. The manufacturer
recommends using two elbows to create a “swing joint” to reduce potential strain as shown in Figure 4-1(a), (b).
Gasket Seating - Improper seating can cause leakage and eventual failure of the sealing
gasket. Failure to follow these instructions may result in serious injury or death.
Table 4-2 Mandatory Vent Pipe
Model No. CPVC Vent Pipe Size CPVC Vent Pipe Length Full Insertion Depth
Trinity Lx150-200 3” Minimum 5” [127 mm] 2-7/8” [73 mm]
Trinity Lx400 4” Minimum 4” [100 mm] 1-7/8” [48 mm]
Trinity Lx
11
Swing Joint
Coupling
Exhaust Vent
Flue Outlet
Air Inlet
3” Pipe *
Coupling
Mandatory Vent Pipe
-
CPVC, min. 5” long
Swing Joint
Exhaust Vent
Flue Outlet
Air Inlet
Coupling
Swing Joint
Exhaust Vent
Coupling
Flue Outlet
Air-Inlet
Man
dator
y Vent Pipe
-
Coupling
Exhaust Vent
Flue Outlet
Swing Joint
Coupling
Air-Inlet
4” Pipe *
Trinity Lx
│Installation and Operation Instructions Lx Series
- to
attain slope in
horizontal runs
Figure 4-1(a) Lx150-200 Models Figure 4-1(b) Lx150-200 Models
Near Appliance Venting (CPVC) Near Appliance Venting (PVC)
attain slope in
horizontal runs
- to
-
3” Pipe *
- 3”
Removable
(field supplied)
Near Appliance Venting (CPVC) Near Appliance Venting (PVC)
4”/6” CPVC
-
-
3” CPVC
- Stainless
Steel Adapter (factory
supplied)
- 3”
Removable
(field supplied)
(check local codes and
Table 4-3)
3”
(factory supplied)
Steel Adapter (factory
supplied)
Figure 4-2(a) Lx400 Model Figure 4-2(b) Lx400 Model
attain slope in
horizontal runs
-
- to
- 4”/6”
PVC (check local
codes and Table 4-3)
attain slope in
horizontal runs
PVC
- 3” PVC,
- 3” PVC
- Stainless
- to
- 4”/6”x4”
Steel Adapter (factory
supplied)
90o elbow typical, or tee and
drain cap option for easy cleanouts
In Canada, the first 3 ft (915 mm) of vent piping must be readily accessible for inspection.
12
- Stainless
4” Pipe *
- 4”
Removable
(factory supplied)
4” CPVC, minimum 4”
long (factory supplied)
90o elbow typical, or tee and
drain cap option for easy cleanouts
Steel Adapter (factory
supplied)
Removable
(factory supplied)
- Stainless
- 4”
Lx Series Installation and Operation Instructions │
1 2 3 4 5 6 7 8 9
Vent/Air-Intake Pipe Material
Table 4-3 Acceptable Vent and Air-Intake Pipe Material
Items 1
Vent Pipe and
Fittings
Materials
PVC - DWV ANSI/ASTM D2265
PVC Schedule 40 ANSI/ASTM D1785
2, 3
CPVC Schedule 40 ANSI/ASTM F441
Pipe Cement
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
Primers
Notes:
1
Refer to Table 4-4 for Allowable Vent and Air-Intake Pipe Sizes and Lengths.
2
Closet/alcove installations in US and Canada require approved CPVC vent pipe, fittings, cements, and primers.
3
The Air-Intake does not require high temperature pipe material. Check applicable local codes for acceptable materials.
4
ULC S636 PVC is approved for flue gas temperatures up to 149oF (65oC) and must only be used for low temperature
PVC / CPVC ANSI/ASTM F656
applications. High temperature applications requiring appliance supply water temperatures greater than 140oF (60oC)
must use ULC S636 approved CPVC.
Mandatory Pre-commissioning Procedure for Plastic Venting
Do not apply power to the appliance prior to Step 4 in the Mandatory Pre-commissioning
Procedure for Plastic Venting.
1) Working with the power turned off to the appliance, completely install the vent and air intake system,
securely cementing joints together. If possible, allow primers/cements to cure for 8 hours before firing the
burner. If curing time is less than 8 hours, proceed with Steps 2 through 6.
2) Maintain the appliance gas supply shut-off valve in the off position.
3) Disconnect electrical leads to the Hot Surface or Spark Igniter. Ensure the cables are placed in a fashion
where they will not arc to ground or other conductor.
Spark Igniter Cable - Maintain a minimum 2” separation between spark igniter circuit and
conductors. Failure to follow instructions may result in component failure, injury or death.
4) Turn power on to the appliance and apply a heat demand.
5) Allow for 3 complete trials for ignition, consisting of pre and post purge of the combustion blower, until an
ignition lockout occurs. Repeat the process two more times (i.e. 9 complete ignition sequences in total).
6) Turn power off and reconnect the electrical leads to the Igniter.
Vent/Air-Intake Pipe Length Determination
Use Table 4-4 to determine the maximum pipe length that can be used. The table calculates sweep, 90º elbows,
and 45º elbows at 5 equivalent feet [1.52 m] each. Allowable equivalent pipe lengths for vent and air-intake
pipes are shown separately for Natural Gas and LP. Example: An Lx200 can be installed with 105 equivalent
feet [32 m] of air-intake piping and 105 equivalent feet [32 m] of vent piping when operating with Natural Gas.
Table 4-4 Allowable Vent and Air-Intake Pipe Size and Lengths
Model No.
Trinity Lx150
Pipe
Size
Gas
3” Natural
Trinity Lx150E
Trinity Lx200
Trinity Lx400
3” LP
Natural
4”
& LP
Natural
6”
& LP
The length of one vent pipe (intake or exhaust) may not exceed the length of the other vent pipe by more
than 20 equivalent feet (6.1 m). Length calculations need not include the three 90° elbows of the exterior vent
piping (two outlet, one inlet). When operating with Propane Gas (LP), the maximum vent length in equivalent
feet is limited to 50’ (3” pipe), 30’ (4” pipe), and 65’ (6” pipe) depending on model number. See Table 4-4.
Length
ft. [m]
105
[32]
50
[15.2]
30
[9.1]
65
[19.8]
Installation Standards
United States
Canada 4
All venting material in
Canada must be
ULC S636 approved.
See Note 4 below for
appropriate temperature
applications.
All Vent and Air-Intake
materials installed on gas
fired appliances in CAN/US
must meet the Standards
listed in Table 4-3. Failure
to comply could result in
fire, serious injury or death.
Number of Elbows (90’s or 45’s) and Equivalent Feet [Meters]
100
[30.5]
45
[13.7]
25
[7.6]
60
[18.3]
95
[28.9]
40
[12.2]
20
[6.1]
55
[16.8]
90
[27.4]
35
[10.7]
15
[4.6]
50
[15.2]
85
[25.9]
30
[9.1]
80
[24.4]
25
[7.6]
10
[3.0] 5 [1.5]
45
[13.7]
40
[12.2]
75
[22.9]
20
[6.1]
70
[21.3]
15
[4.6]
- - - -
35
[10.7]
30
[9.1]
Trinity Lx
65
[19.8]
10
[3.0] 5 [1.5]
25
[7.6]
60
[18.3]
20
[6.1]
13
Trinity Lx
│Installation and Operation Instructions Lx Series
Two-Pipe Venting Options
Figure 4-3(a) Lx150-200
Two-Pipe Side Wall Termination
Figure 4-3(b) Typical for All Models
Two-Pipe Roof Termination
Figure 4-4(a) Lx400 Figure 4-4(b) Lx400 Only
Two-Pipe Side Wall Termination Two-Pipe Side Wall Termination (Optional Kit)
14
Lx Series Installation and Operation Instructions │
Concentric Venting Options
Figure 4-5(a) Lx150-200
Concentric Side Wall Termination (Optional Kit)
Concentric Roof Termination (Optional Kit)
Figure 4-5(b) Lx150-200
Trinity Lx
Optional Termination Kits
Lx400 Side Wall Termination Kit
• Use NTI part number 83236 (4” connections; if venting with 6”, must adapt down to 4” at interior trim piece).
• Side-wall terminations only.
• Instructions included with vent terminal contain more detailed assembly and installation instructions.
Concentric Vent Termination Kit - United States
• Use NTI part number 82666 (York part number 1CT0303). Kits no longer approved for use in Canada.
• Optional for Trinity models Lx150-200 only (not for use with Lx400).
• Instructions included with vent terminal contain more detailed assembly and installation instructions.
• Clearance requirements in this manual supersede those of the instructions included with the vent terminal.
• Terminal MUST be cemented together during installation.
Concentric Vent Termination Kit - Canada
• Use IPEX part number 196006 (Concentric Kit) and 196051 (Vent Screen), certified to ULC S636. Use of
this material is subject to approval by local authorities. Kit 82666/1CT0303 no longer approved for Canada.
• Optional for Trinity models Lx150-200 only (not for use with Lx400).
• Instructions included with termination kits contain more detailed assembly and installation instructions.
• Clearance requirements in this manual supersede those of the instructions included with the vent terminal.
NTI does not stock System 636 PVC Concentric Vent Termination Kits as they are readily available from IPEX
via Canadian wholesalers. Canadian customers wanting more information on System 636 Concentric Vent Kits
or wholesaler locations can contact IPEX directly at 1-866-473-9462 (toll free in Canada) or www.ipexinc.com.
PVC In Canada - Safety authorities in some jurisdictions are not allowing PVC venting
materials with appliances of any kind, even if System 636 certified. Check with the local
safety inspector to verify compliance prior to installing a PVC Concentric Vent Kit with a Trinity Lx appliance.
Venting Options - Due to potential moisture loading (build-up) along the exterior wall,
sidewall venting may not be the preferred venting option. See Figures 4-3(b) and 4-5(b).
15
mounts to exterior wall
(typical)
Boiler
Boiler
Boiler
Side-Wall
Termin
ation
Kit
wall Termination Kit
include vent screen, interior
Boiler
(fully assembled and installed)
Vent
Screen
Vent Screen
Screen
Air-Inlet
Trinity Lx
│Installation and Operation Instructions Lx Series
Labeling and Identification – Side Wall Terminations
Figure 4-6(a) Typical for All Models
Two-Pipe Side Wall Termination
Figure 4-6(b) Lx400 Only
Two-Pipe Side Wall Termination (Optional Kit)
Gas Vent Directly Below
Keep Free of Obstructions
Exhaust
Vent
Vent
Venting
Insert vent
screen into
socket joint of
termination
elbow. Secure
by cementing
a short piece
of venting into
the socket.
Warning Plate
Combustion
Vent
Venting
Terminal
Exhaust
Vent with
Vent Screen
Labeling and Identification – Lx400 Side Wall Termination Kit
Figure 4-7 Lx400 Only
Two-Pipe Side Wall Termination (Optional Kit)
Gas Vent Directly Below
Keep Free of Obstructions
Warning Plate
Combustion
Air-Inlet
(between
back of vent
terminal and
exterior wall)
Support Couplings
/ Reducer (must
reduce down to
4” at this point if
using 6” piping)
Exhaust Vent Piping
From
To
4” Thru-Wall
Extension
Piping
Combustion Air-Inlet
Vent
Screen
Interior
Trim
Framing
within wall
Vent Terminal - 4”
connections standard,
From
To
The Vent and Air-Inlet pipes
are field supplied. Major
components provided in the
Side-
trim and vent terminal.
Side-Wall
Termination Kit
16
Lx Series Installation and Operation Instructions │
connection
exhaust
Air-Inlet
Exhaust Vent
appliance
To appliance
End Cap
Vanes
Air-inlet
Exhaust Vent
Exhaust
Vent
Air-Inlet
Chimney
Labeling and Identification – Concentric Vent Kit
Figure 4-8(a) Lx150-200 Figure 4-8(b) Lx150-200
Concentric Vent Side Wall Termination Concentric Vent Detail with Vent Screen
Gas Vent Directly Below
Keep Free of Obstructions
Combustion
Air-Inlet
(perimeter)
Warning Plate
Concentric
“Y” Fitting
Exhaust Vent
Outlet (center)
End Cap
From
exhaust
air-inlet
connection
Combustion
(typical)
Insert vent screen between the end of the appliance
exhaust vent and the end cap as shown.
Appliance
Air-Inlet
Pipe
Appliance
Exhaust
Vent Pipe
End Cap
Vent Screen
(factory supplied with
Kit). Refer to Optional
Termination Kits.
The End Cap
must be secured
to the vent pipe
via cement or
stainless steel
screws.
Trinity Lx
Labeling and Identification – Roof Top Terminations
Figure 4-9(a) All Models Figure 4-9(b) Lx150-200
Two-pipe terminations typically penetrate the roof
surface. An alternative is to use an existing chimney
as a chase way. See Figure 4-12 for more details.
Two-Pipe Roof Top Termination Concentric Vent Roof Top Termination
To prevent water leakage, install adequate roof
weather seal flashing (not included) around roof
penetration as shown.
Cap
Existing
Chimney
(used as a
chase way)
Flashing
Roof weather
seal flashing
(field supplied)
Support
(field
supplied)
From
appliance
24” [610 mm]
from terminal
end cap vanes
To appliance
air-inlet
17
Trinity Lx
│Installation and Operation Instructions Lx Series
Venting Rules and Guidelines
1. Prevailing Winds: Ensure the vent is located where it will not be exposed to normal prevailing winds.
2. Combustion Air-Intake Contamination: Air for combustion must be drawn from outdoors from an area
free of dust and contaminants. Combustion air containing chemicals such as chloride, fluoride, bromine or
iodine or dust and debris will cause corrosion damage of the heat exchanger voiding your NTI warranty.
Refer to Table 4-1 for a list of corrosive products and contaminants sources to avoid.
3. Vertical Separation: The exhaust must be a minimum of 18” [457 mm] above the air inlet, and the air inlet
must always be a minimum of 12” [305 mm] plus snow allowance above any surface that will support snow.
(Two feet plus snow allowance is highly recommended). Consult your weather office, for the maximum
typical snowfall for your region.
Example: New Brunswick Canada - typical maximum snowfall is 19”, thus the inlet must be (12”+19”) =
31” above grade and exhaust must be (31”+18”) = 49” above grade.
4. Horizontal Separation: The horizontal distance between the inlet and exhaust must be a minimum of 4”
[102 mm] center to center. When the horizontal distance between the inlet and exhaust is greater than 12”
[305 mm], the difference in horizontal distance must be determined and the vertical separation increased by
the same amount.
Example: The horizontal distance (HD) = 24” [610 mm], and the vertical separation (VSmin) = 18” [457
mm], the new vertical separation (VSnew) can be calculated using the following equation:
VSnew = (HD - 12”) + VS, where VSnew = (24” - 12”) + 18” = 30”.
(If the horizontal distance is greater than 6’ [1.83 m], no additional vertical spacing is required. Vertical
separation is never required to be greater than 36” [915 mm].
5. Wall Flashing: Under normal operating conditions this appliance will produce a plume of white gases, and
should be taken into consideration when selecting an adequate location. A 36” [915 mm] diameter stainless,
plastic, or vinyl shield can be used to flash the exterior of the residence.
6. Flue Gas Hazard: Position the vent termination where vapors cannot make accidental contact with people
and pets or damage nearby shrubs and plants.
7. Elbow Extensions: Elbows on outside of wall must be no more than ½” [13 mm] away from the wall.
8. Vent Sloping: All indoor exhaust piping must be on a slope back to the appliance a minimum of ¼” per
linear foot of vent [6.25 mm per linear 305 mm]. For applications where excessive condensation is possible
½” per linear foot [13 mm per linear 305 mm] is recommended.
9. Vent Supports: Where required Vent and Air-intake piping shall be secured to the wall for more rigidity.
All interior vent pipe shall be supported a minimum of every 36” [915 mm]. If 6” diameter pipe is used
with the Lx400, it need only be supported every 48” [1.22 m].
10. Roof Exhaust: In all roof applications the discharge must point away from the pitch of the roof.
11. Roof Flashing: Install adequate flashing where the pipe enters the roof, to prevent water leakage.
12. Rain Cap: Install and seal a rain cap over existing chimney openings, in vacant chimney applications.
13. Venting Below Grade: For installations that exit the wall below grade refer to Figure 4-9.
14. Vent Screens: Install factory supplied vent screens on the outside of the last elbow for both the inlet and
exhaust vent terminal elbows. Install the screen into the female opening of the elbow. Then cut a small piece
of pipe to sandwich the screen into the elbow. NOTE be sure that the small piece of pipe cut, does not
extend past the end of the elbow. Two screens are provided in the package. See Figures 4-6(a) and (b) and
Figures 4-8(a) and (b).
15. Pipe Sizing: It is extremely important that the intake and exhaust vent piping be adapted to the appropriate
size immediately upon exiting the appliance cabinet. Refer to Table 4-2.
16. Condensate Hazard: Do not locate vent over public walkways, driveways or parking lots. Condensate
could drip and freeze resulting in a slip hazard or damage to vehicles and machinery.
17. Warning Plate: Install the warning plate “Gas Vent Directly Below”, directly above (within 4 ft [1.22 m]
vertically) the location of the air inlet pipe, so it is visible from at least 8 ft [2.4 m] away. See Figure 4-10.
18. Wall Thickness: Direct vent terminations are designed to work with any standard wall thickness.
Installation guidelines for min/max wall thickness are as follows: Min.= 1” [25mm], Max.= 60” [1.52 m].
19. Venting Options: Due to potential moisture loading (build-up) along the exterior wall, sidewall venting
may not be the preferred venting option. Refer to Figures 4-3(b) and 4-5(b) for alternative venting options.
18
Lx Series Installation and Operation Instructions │
Chimney
Min.
above air
-
inlet
level
Figure 4-10 All Models
Venting Below Grade
Trinity Lx
For installations that exit the wall below grade:
1. Excavate site as shown in Figure 4-9, to a point
below where the pipes are to exit.
2. Ensure that the wall is fully sealed where the
pipes penetrate the wall.
3. The Vent/Air-intake piping MUST be secured
to the side of the building above grade, as
shown, to provide rigidity.
4. NTI Provides a mounting bracket PN. 82075 for
securing the exhaust pipes.
5. Ensure that the Vent/Air-Intake clearances are
maintained, see Section 5.0 for details.
Figure 4-11 All Models
Outdoor Horizontal Venting
Vent piping outside the Building is permitted under
the following conditions:
1. The maximum length outside the building is 20
feet [6.1 m]. Note that outdoor length must be
included in the overall vent length calculation.
2. Only 3” pipe can be used for Lx150-200 models,
only 4” pipe can be used for the Lx400 model.
3. All normal termination clearances are maintained.
4. All exterior exhaust vent pipes are insulated with
3
½” [89 mm]
- ID for Lx150-200, or 4½”[114
mm] - ID for Lx400, ½” [13 mm] thick, Closed
Cell Foamed Polyolefin Tubing i.e., “Tundra
Seal Plus” or equivalent.
5. The pipe is supported every 24” [610 mm].
6. The exhaust and inlet are sloped back to the
appliance ½” elevation for every linear foot [13
mm for every linear 305 mm].
Exhaust Vent
Air-Inlet
Gas Vent Directly Below
Keep Free of Obstructions
Apply
Warning
Plate
here
Air-Inlet
12” [305 mm] plus
snow allowance above
Exhaust
Vent
Mounting
Bracket
Supports every
24” [610 mm]
Maximum of 20 ft
[6.1 m] is permitted
for piping outside a
building.
It is permissible to use an existing chimney as a chase
way to run the Vent/Air-Intake piping as long as:
1. The chimney is not being used by any other
appliance.
2. Flue gases don’t enter the vacant chimney.
3. Only Trinity certified venting materials are used,
see Section 4.0.
4. Vent lengths are within the maximums specified.
5. The top of the chimney is capped and the
Vent/Air-Inlet pipes are flashed to prevent
leakage into the vacant chimney.
Figure 4-12 All Models
Existing Chimney Chase Way
Cap
Existing
Chimney
(used as a
chase way)
Exhaust Vent
Air-Inlet
Exhaust Vent
18” [457 mm]
Air-Inlet
Min. 12” [305 mm]
above roof / snow
19
-
Trinity Lx
5.0 VENT/AIR-INTAKE TERMINATION CLEARANCES
│Installation and Operation Instructions Lx Series
The quick reference table below is to be read in conjunction with the numbered notes as
indicated, Figures 5-1 through 5-6, and the Venting Rules and Guidelines in Section 4.0.
The instructions detailed in this section are a combination of Trinity Lx specific and National Gas Code
restrictions. Compliance alone doesn’t insure a satisfactory installation as good common sense must also be
applied. Failure to follow these instructions may result in fire, property damage, serious injury or death.
Table 5-1 Termination Clearances Quick Reference Table
Clearances to Air-Inlet Termination
A Above grade/roofline and snow level 8 12 in. 305 mm 12 in. 305 mm
B Above roof line - Concentric Vent
6, 11, 13
24 in. 610 mm 24 in. 610 mm
C To exhaust vent from any other appliance 36 in. 915 mm 12 in. 305 mm
Clearances to Exhaust Vent Termination Min. Distance Min. Distance
D Minimum vertical separation above air inlet 9 18 in. 457 mm 18 in. 457 mm
E Minimum horizontal separation from air inlet 3 4 in. 102 mm 4 in. 102 mm
F Window, door or building opening 36 in. 915 mm 12 in. 305 mm
G To combustion air inlet from any other appliance 36 in. 915 mm 12 in. 305 mm
H Non-mechanical air supply inlet to building 36 in. 915 mm 12 in. 305 mm
I Mechanical air supply inlet to building 4 6 ft. 1.83 m 3 ft. 915 mm
J Soffit, overhang, eave or parapet 24 in. 610 mm 24 in. 610 mm
K Soffit vent or vent opening in an overhang, eave or parapet 6 ft. 1.83 m 6 ft. 1.83 m
L Outside corner 10
M Inside corner of an L-shaped structure (including walls and fences) 36 in. 915 mm 36 in. 915 mm
N Electric meters, gas meters, regulators and relief equipment 6 ft. 1.83 m 4 ft. 1.22 m
P Each side of center line above or below meters, regulators and relief devices 5 36 in. 915 mm 36 in. 915 mm
Q Above a paved sidewalk, driveway, or parking lot on public property if adjacent
12
R Above a sidewalk, driveway, or parking lot on public property
S Above a sidewalk, driveway on private property between / serving both dwellings
T Under a concrete veranda, porch, deck, or balcony 7 24 in. 610 mm 24 in. 610 mm
U Above, under or near exterior stairs
V Into a canopy or carport
Notes:
1 - Canadian installations must comply with the current CSA B149.1 Natural Gas and Propane Installation Code and local
building codes.
2 - US installations must comply with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code and local building codes.
3 - Horizontal separation center-to-center (c.c.) 4”-12” (102-305 mm). Refer to “Venting Rules and Guidelines” for
horizontal separation > 12” c.c. as it may impact vertical separation clearances.
4 - For US installations, an exhaust vent may be 3 ft above a mechanical air supply inlet if within 10 ft. [3 m] horizontally.
5 - Horizontal clearance must be observed up to a height of 15 ft. [4.6 m] above/below the meter, regulator, or relief devices
6 - Concentric Vent must protrude from the roof precisely 24” [610 mm] measuring from the terminal end-cap vanes.
7 - Permitted if veranda, porch, deck, or balcony is made of concrete and a minimum of two sides are fully open beneath.
8 - 24” is the recommended snow level allowance above grade/roofline or any surface that will support snow, debris, or ice
(i.e. for roof venting clearances - roofline and snow level). If living in a snowfall region, consult your local weather
office for the maximum typical snowfall for your area.
9 - Note that the vent must maintain a minimum vertical distance above the air inlet. Example: Vent height = 18” (457
mm) above air inlet + 12” (305 mm) for air inlet above grade/roof line and snow level = 30” (762 mm) above grade and
snow level.
0 - Clearances to an outside corner to be in accordance with local installation codes.
11 - In Canada, concentric vent materials are subject to approval by local inspectors. See Termination Kits in Section 4.0.
12 - Above public walkways, driveways or parking lots if adjacent to it and condensate cannot drip, freeze, or create a hazard.
13 - Contact the manufacturer for special exemptions relating to multiple appliance installations using concentric vents.
X
- Not permitted by National gas code(s) and/or recommended by appliance manufacturer.
Canada 1 USA 2
Min. Distance Min. Distance
-
- -
7 ft. 2.13 m 7 ft. 2.13 m
X X X X
X X X X
X X X X
X X X X
.
20
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