NTI Lx150-400 User manual

Trinity Lx
Model Numbers: Lx150-400
Version Date: 2010-01-01
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
1.0
INTRODUCTION................................................................................................................3
2.0
SPECIFICATIONS ..............................................................................................................6
3.0
APPLIANCE LOCATION...................................................................................................7
4.0
GENERAL VENTING.......................................................................................................11
5.0
VENT/AIR-INTAKE TERMINATION CLEARANCES..................................................20
6.0
CONDENSATE DRAIN....................................................................................................24
7.0
INSTALLING GAS PIPING..............................................................................................25
8.0
LIGHTING THE APPLIANCE .........................................................................................27
9.0
GAS VALVE AND BURNER SET-UP ............................................................................29
10.0
WIRING SCHEMATICS...................................................................................................34
11.0
INSTALLATION CHECKLIST........................................................................................36
12.0
ANNUAL MAINTENANCE AND INSPECTION...........................................................37
13.0
PARTS LIST ......................................................................................................................39
14.0
TROUBLESHOOTING .....................................................................................................45
HAZARD SYMBOLS AND DEFINITIONS
Danger Sign: I
ndicates a hazardous situation which, if not avoided, will
result in serious injury or death.
Warning Sign: Indi
cates a hazardous situation which, if not avoided,
could result in serious injury or death.
Caution Sign plus Safety Alert Symbol: I
ndicates a hazardous situation
which, if not avoided, could result in minor or moderate injury.
Caution Sign without Safety Alert Symbol: Indicates a
hazardous
situation which, if not avoided, could result in property damage.
Notice Sign: I
ndicates a hazardous situation which, if not avoided,
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.
®
NEW FEATURES
Second Central Heat Input
Internal Lead-Lag Control
System Sensor
Modulation Sensor Alternatives
Warm Weather Shutdown

Trinity Lx │Installation and Operation Instructions Lx Series
2
Read Before Proceeding
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 appliance and to replace any part of the control system and any gas control which has
been under water.
OPERATING INSTRUCTIONS_
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.

Lx Series Installation and Operation Instructions │Trinity Lx
3
1.0 INTRODUCTION
Installation and Operation Instructions – These instructions apply to the installation
and operation of Trinity Lx150-400 units and covers instructions that are common-to-
both 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) Application Manuals (Appliance-Specific)
Boiler Lx150-400 Trinity Lx Series Appendix B
Boiler Applications
Water
Heater Lx200 & 400 Trinity Lx Series 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.

Trinity Lx │Installation and Operation Instructions Lx Series
4
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.
Natural to LP Propane Conversion Kit _
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 4
o
F. For set up details refer to the "Warm Weather Shutdown
Configuration" in Appendix A - Controller and Touchscreen Display. Not used for water heater applications.

Lx Series Installation and Operation Instructions │Trinity Lx
5
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.

Trinity Lx │Installation and Operation Instructions Lx Series
6
2.0 SPECIFICATIONS
Table 2-1 Specifications
DESCRIPTION Lx150 Lx150E Lx200 Lx400
CSA Input Modulation
1
btu/hr [kw] 25,000 - 150,000
2
[7.3 - 44.0]
25,000 - 150,000
[7.3 - 44.0] 25,000 - 199,000 [7.3 - 58.3] 75,000 - 399,000 [21.9 - 117]
DOE Heating Capacity
1,3
btu/hr [kw] 136,000 [39.8] 139,000 [40.7] 182,000 [53.3] 374,000 [109.6]
Net I=B=R Rating
1,3
btu/hr [kw] 118,000 [34.8] 121,000 [35.4] 158,000 [46.3] 325,000 [95.2]
DOE AFUE
3
% 95.1 97.0 95.1 94.0
6
Recovery Rating @ 100
o
F 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
5
, in. [mm] 3 [76] 3 [76] 3 [76] 4 [102] 6 [152]
Vent/Air-Intake, Max. Length, NG / LP
ft. [m] 105 / 50 [32 / 15.2] 105 / 50 [32 / 15.2] 105 / 50 [32 / 15.2] 30
7
[9.1] 65
7
[19.8]
Dimensions H x W x D
in. [mm] 29.5 x 17 x 18.5 [749 x 432 x 470]
29.5 x 17 x 18.5
[749 x 432 x 470] 29.5 x 17 x 18.5 [749 x 432 x 470] 36 x 17 x 24 [915 x 432 x 610]
Approx. Appliance Weight with Water,
lbs [kg] 100 [45.3] 125 [56.7] 125 [56.7] 225 [102]
Notes:
1
Listed Input and Output ratings are at minimum vent lengths at Sea Level. Numbers will be lower with longer venting
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
1
de-rate by 5% de-rate by 5% de-rate by 5% de-rate by 5% de-rate % may vary
In USA
2
- de-rate by 4% de-rate by 8% - de-rate by 12%
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].
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
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.

Lx Series Installation and Operation Instructions │Trinity Lx
7
3.0 APPLIANCE LOCATION
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 factory-
approved 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 in
2
per 1000 Btu/hr,
but not less then 100 in
2
. 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 in
2
per 1000 Btu/hr, but not less then 100 in
2
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 Dimensions - inches [mm]
Model No. Clearances
Front
Top
Left Side
Right Side
Rear
Bottom
Minimum 24 [610]
1,3
12 [305] 12 [305] 4 [102] 0 0
Trinity Lx150-200 Recommended 24 [610] 24 [610] 24 [610]
2
4 [102] 0 0
Minimum 24 [610]
1,3
12 [305] 12 [305] 12 [305] 0 0
Trinity Lx400 Recommended 24 [610] 24 [610] 24 [610]
2
12 [305] 0 0
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).

Trinity Lx │Installation and Operation Instructions Lx Series
8
Figure 3-1(a) Lx150-200 Models
Closet Installation, Minimum Clearances
Figure 3-1(b) Lx400 Model
Closet Installation, Minimum Clearances
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.
Ventilation Air Openings
are not required if the
appliance area meets
the listed Recommended
Clearances in Table 3-1.
Top 12” [305 mm]
6” [152 mm] max. above vent opening
Front 6” [152 mm] - Boilers
Front 36” [915 mm] - Water Heaters Left Side 12” [305 mm]
Right Side 12” [305 mm]
6” [152 mm] max. below vent opening
Ventilation Air Opening
1 in
2
per 1000 Btu/hr, min. 100 in
2
Ventilation Air Opening
1 in
2
per 1000 Btu/hr, min. 100 in
2
Removable Surface or Closet Door
Piping must be CPVC
1” [25 mm] clearance for
hot water and vent pipes
Ventilation Air Openings
are not required if the
appliance area meets
the listed Recommended
Clearances in Table 3-1.
Top 12” [305 mm]
Removable Surface or Closet Door
Ventilation Air Opening
1 in
2
per 1000 Btu/hr, min. 100 in
2
Ventilation Air Opening
1 in
2
per 1000 Btu/hr, min. 100 in
2
6” [152 mm] max. above vent opening
6” [152 mm] max. below vent opening
Right Side 4” [102 mm]
Left Side 12” [305 mm]
Front 6” [152 mm] - Boilers
Front 36” [915 mm] - Water Heaters
Piping must be CPVC
1” [25 mm] clearance for
hot water and vent pipes

Lx Series Installation and Operation Instructions │Trinity Lx
9

Figure 3-2(a) Lx150-200 Models
Wall Mounting Installations
 Remove the upper wall mount bracket from the
back of the appliance.
Failure to follow instructions
may
result in fire, serious injury, or death.
This unit requires two people to lift it
or damage and injury may result.
 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".









Ensure that the top of each
slot rests on the bottom of the
grooves in the wall bracket.

Trinity Lx │Installation and Operation Instructions Lx Series
10
Figure 3-2(b) Lx400 Model
Wall Mounting Installations
 While leaving the upper bracket intact (A),
remove the wall mount bracket attached to the
Failure to follow instructions
may
result in fire, serious injury, or death.
This unit requires two people to lift
it
or damage and injury may result.
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.
Water Heaters require "Mandatory Wall Mounting Protection". Refer to Section 1.0 in
Appendix C, "Water Heater Applications: Plumbing & Wiring Instructions".






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.



A
B
B



B
A