NTI TRX User's Information Manual
User’s
Information
TRX
TRX
Manual
User Operating
Instructions
NOTICE
The manufacturer reserves the right
to make product changes or updates
without notice and will not be held
liable for typographical errors in
literature.
The surfaces of these products
contacted by potable (consumable)
water contain less than 0.25% lead by
weight as required by the Safe Drinking
Water Act, Section 1417.
Residential Condensing Gas Boiler
NOTE TO CONSUMER:
PLEASE KEEP ALL INSTRUCTIONS
FOR FUTURE REFERENCE.
Heat Exchanger Bears the ASME “H” Stamp
WARNING
IF THE INFORMATION IN THIS MANUAL IS NOT FOLLOWED EXACTLY,
A FIRE OR EXPLOSION MAY RESULT, CAUSING PROPERTY DAMAGE,
PERSONAL INJURY, OR LOSS OF LIFE. DO NOT STORE GASOLINE OR
OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR
ANY OTHER BOILER.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any boiler.
• Do not touch any electrical 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 depar tment.
Installation and service must be provided by a qualified installer,
service agency, or the gas supplier.
Improper installation, adjustment, alteration, service, or maintenance could
void product warranty and cause property damage, severe personal injury,
or death.
California Proposition 65 Warning: This product contains chemicals
known to the State of California to cause cancer, birth defects, or other
reproductive harm.
WARNING
The combustion chamber insulation in this product contains ceramic fiber material. Ceramic fibers can be converted to cristobalite
in very high temperature applications. The International Agency for Research on Cancer (IARC) has concluded, “Crystalline silica
inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic to humans (Group 1).” DO NOT, UNDER ANY
CIRCUMSTANCES, OPEN THE COMBUSTION CHAMBER OF THIS BOILER! The combustion chamber of this boiler may be opened by a
qualified service technician ONLY. FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE,
SEVERE PERSONAL INJURY, OR DEATH.
SPECIAL ATTENTION BOXES
The following defined terms are used throughout this
manual to bring attention to the presence of hazards of
various risk levels or to important product information.
DANGER
DANGER indicates an imminently hazardous situation
which, if not avoided, will result in serious personal injury
or death.
WARNING
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in personal injury or death.
CAUTION
CAUTION indicates a potentially hazardous situation which,
if not avoided, may result in moderate or minor personal
injury.
CAUTION
CAUTION used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, may
result in property damage.
NOTICE
NOTICE is used to address practices not related to personal
injury.
Table of Contents
Part 1 - Product and Safety Information 4
A. Before Operating the Boiler 4
B. Primary Water 5
C. Freeze Protection 5
D. Combustion Air Contamination Prevention 5
Part 2 - Operating Instructions 6
A. Boiler Operation 7
B. Ignition Procedure 7
C. Central Heating (CH) Temperature Adjustment 7
D. Domestic Hot Water (DHW) Temperature Adjustment 7
E. During Operation 8
F. User Menu 8
G. INFO Menu 10
H. Date and Time 11
I. Automatic CH Temperature Control (AUTO) 11
J. Outdoor Heating Curve Slope 11
K. Outdoor Heating Curve Parallel Shift 11
L. Room temperature Day/night 12
M. Time programs - heating schedule 12
N. Automatic summer / winter changeover 12
O. During operation 13
P. General Cautionary Statements 13
Part 3 - Maintenance Schedule 14
A. Owner Maintenance 14
B. Qualified Service Technician 14
Part 4 - Maintenance Procedures 15
A. Daily Maintenance - To Be Performed by Owner 15
B. Monthly Maintenance - To Be Performed by Owner 15
C. 6 Month Maintenance - To Be Performed by Owner 16
D. Annual Maintenance - To Only Be Performed by a Qualified
Service Technician 16
Part 5 - Troubleshooting for the User 17
Maintenance Notes 18
3
Part 1 - Product and Safety Information
WARNING
Proper care of this boiler is the user’s / owner’s responsibility.
The user should carefully read and understand the Operating
Information in this manual before operating this boiler.
User - Have this boiler serviced / inspected annually by a
qualied service technician.
FAILURE TO ADHERE TO THE GUIDELINES AND WARNINGS
IN THIS MANUAL CAN RESULT IN SUBSTANTIAL PROPERTY
DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.
DO NOT use this boiler if ANY part has been under water.
Immediately call a qualied technician to inspect the boiler and
replace any part of the control system or gas control which has
been under water.
DO NOT power up the boiler unless the gas and water supply
valves are fully opened. Make sure the fresh air intake pipe and
exhaust vents are open and functional.
DO NOT attempt to install, repair, or service this 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 attempt to disassemble this boiler. If repairs are required,
contact a qualied service technician.
All safety devices must be tested by the installer / qualied
service technician after the boiler is installed.
Always verify proper boiler operation with the qualied service
technician after servicing.
The gas ignition system components must be protected from
water (dripping, spraying, rain, etc.) during boiler operation
and service (circulator replacement, condensate trap, control
replacement, etc.)
DO NOT touch the exhaust vent or hot water pipes during boiler
operation.
Combi models / boilers using indirect water heating: Always be
careful when opening a hot water faucet or draining water from
the boiler. Water temperature over 125°F can instantly cause
severe burns or death from scalds. Children, disabled, and
elderly are at the highest risk of being scalded. See Installation
Manual before setting temperature at boiler. Feel water before
bathing or showering!
A. Before Operating the Boiler
1. Check the Gas Type
When operating the boiler for the first time, ensure the connected
gas type matches the boiler gas type. NTI boilers are factory set
to operate on Natural Gas. BEFORE OPERATING WITH PROPANE
the boiler must be converted to Propane operation by a qualified
service technician, using the conversion kit specific to the boiler
model.
DANGER
Attempting to operate this boiler on Propane when it has not been
correctly converted to Propane operation will result in improper
boiler operation resulting in property damage, personal injury, or
death.
2. Check the Power (120V / 60 Hz)
Ensure the boiler is connected to a properly rated power supply.
WARNING
Failure to connect the boiler to the properly rated power supply
described above (120V / 60Hz) could result in property damage,
personal injury, or death.
3. Check the Automatic Feed Valve
Ensure the automatic feed valve to the boiler is providing the
proper pressure to the central heating (CH) loop.
4. Check the Gas Shut-Off Valve
Ensure the manual gas shut-off valve is open. The boiler will not
operate unless it is supplied with gas.
WARNING
It is the user’s responsibility to know the location of the gas shut-off
valve and how to operate it. Immediately close the gas shut-off valve
if the boiler is subjected to fire, overheating, flood, physical damage,
or any other damaging condition that might affect the operation of
the unit. Have the boiler checked by a qualified technician before
resuming operation.
Call a qualified service technician if repair of the gas pipeline or
replacement of the gas regulator is necessary.
5. Check the area around the boiler.
Remove any combustible or flammable materials from the area
around the boiler and do not hang anything from the exhaust
vent pipe.
This boiler features a factory installed overheating prevention
device. This limit will shut down the boiler in the event that
the boiler water temperature exceeds the set point of the limit
control. Certain local codes require additional water temperature
limiting devices.
4
WARNING
DO NOT store flammable or combustible materials near this boiler.
DO NOT use spray paint, hair spray, or any other flammable sprays
near the boiler or near the exterior fresh air intake pipe termination.
DO NOT place any items in or around the exterior exhaust vent
termination and/or fresh air intake pipe that could restrict or block
the flow in or out of the vent system.
Exhaust gas entering the living space can cause carbon monoxide
poisoning. If exhaust gas should leak into the living space:
• Shut down the boiler.
• Close the gas valve.
• Open windows for ventilation.
Immediately call a qualified service technician to inspect the boiler
and exhaust vent pipe. Any damages to the exhaust vent pipe should
be repaired immediately.
Part 1 - Product and Safety Information
B. Primary Water
• Do not attempt to clean the heating system. Call a qualified
service technician for service.
• If you notice any leaks, immediately call a qualified service
technician. Leaks in boiler or piping must be repaired at once.
C. Freeze Protection
WARNING
Closed loops that use glycol as heat transfer fluid must be serviced
periodically. Glycol can break down over time, become acidic, and
attack gaskets and seals in boilers. This can result in property damage,
severe personal injury, or death.
Each glycol manufacturer has different recommendations for
testing and replacement. Do not test glycol quality yourself. Have
your qualified service technician check glycol quality during annual
servicing. If you are unsure when your glycol was last tested, call a
qualified service technician to test and replace glycol, if necessary.
DO NOT shut off the boiler for long periods of time during potentially
freezing conditions. If the boiler must be shut off during potentially
freezing conditions (is not to be used for an extended period of time),
shut down the system and drain it of water. Shut off the gas and cold
water supply valves.
Ensure exposed water pipes are thermally insulated to prevent
damage due to freezing conditions. If the boiler is not to be used for
an extended period of time during freezing conditions, shut down
the system and completely drain the boiler.
If the water pipes should freeze, thaw the pipes with a hair dryer or
other electric heating device. If this does not work, call a qualified
service technician.
Products to Avoid
Spray cans containing
fluorocarbons
Permanent wave solutions Swimming pools
Chlorinated waxes / cleaners Metal fabrication plants
Chlorine-based swimming pool
chemicals
Calcium chloride used for thawing Refrigeration repair shops
Sodium chloride used for water
softening
Refrigerant leaks Auto body shops
Paint or varnish removers Plastic manufacturing plants
Hydrochloric or Muriatic acid
Cements and glues New building construction
Antistatic fabric softeners used in
clothes dryers
Chlorine-type bleaches, laundry
detergents, and cleaning solvents
Adhesives used to fasten building
products
Table 1 - Products and Areas Likely to Have Contaminants
NOTE: DAMAGE TO THE Boiler CAUSED BY EXPOSURE TO
CORROSIVE VAPORS IS NOT COVERED BY WARRANTY.
(Refer to the limited warranty for complete terms and conditions.)
Areas Likely to Have
Contaminants
Dry cleaning / laundry areas
and establishments
Beauty shops
Photo processing plants
Furniture refinishing areas
and establishments
Remodeling areas
Garages and workshops
D. Combustion Air Contamination Prevention
DANGER
Do not operate the boiler if its combustion air intake is located in or
near one of the areas or in the vicinity of products listed in Table 1.
These areas will always contain hazardous contaminants that can
form strong acids while passing through the burner and vent
system. These acids will corrode the boiler’s heat exchanger, burner
components and vent system, resulting in flue gas spillage and/
or water leakage, possible substantial property damage, severe
personal injury, or death. If the boiler combustion air intake is located
in any area likely to cause or contain contamination, or if products
which would contaminate the air cannot be removed, the intake
must be re-piped and terminated to another location.
DO NOT re-pipe ventilation system on your own. Call a qualified
service provider for assistance.
5
Part 2 - Operating Instructions
AUTO
0
ON OFF
COMFORT
MENU PAR
CODE
SRA
21 3 4 5 6
Figure 1 - Control and Display Overview
Item # Description
1 ON / OFF Button (see NOTICE below)
2 Domestic Hot Water Adjustment Button +/-
3
4 HISTORY Button - view last 10 errors
5 RESET Button (see NOTICE below)
6 OK – confirms menu selection
7 ESC – exits menu selection
8 Heating Temperature Adjustment Button +/-
9 Display
Table 2 - Control Descriptions
(short press = User Menu); (long press = Info Menu)
MENU
NOTICE
Operating Description
On / Off Button
The button lights (white) when the boiler is
electrically powered.
8 9
7
Display Icon Description
Digits Indicating:
• Boiler Status
• Temperature indication (oF) with bar
level
• Error Codes (ERROR)
• Press Reset Button Request (RESET)
(boiler lockout)
• Menu Settings
Technical assistance request
Flame detected with indication of power used
CH Heating Operation Set
CH Heating Operation Active
DHW Operation Set
DHW Operation Active
Hot Water Comfort Activated (Combi Only)
Boiler off with Antifreeze Function Active
Antifreeze Function Active
6
On / Off Button
The button is not lit in the event of an error or
power failure.
RESET BUTTON
The button lights (red) in the event of a lockout
error.
After pressing the Reset button to clear an
error condition, the button will flash for five (5)
seconds.
AUTO Automatic Temperature Control activated
High Efficiency Operation
(Low CH flow temperature)
Solar inlet temperature probe connected Optional
Error signal - Display will also show a code and
description
Outdoor Sensor Connected - Optional
WiFi Active
Table 3 - Display Icon Descriptions
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