NTI S, S-SR, SL Installation And Operation Instructions Manual
Trin & Stor
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Model Numbers: S, S-SR, SL Series
Version Date: 2010-06-01
INDIRECT WATER HEATERS
NEW PRODUCT LINE
Indirect Water Heaters
Stainless Steel Solar
Stainless Steel
Stone Lined
INSTALLATION AND OPERATION INSTRUCTIONS
To be installed in conjunction with a NTI Boiler
TABLE OF CONTENTS
INTRODUCTION................................................................................................................2
Trin & Stor Specifications....................................................................................................2
I.O.M. Checklists..................................................................................................................3
General Installation Requirements .......................................................................................4
Safe Temperatures for Potable Water...................................................................................5
WATER HEATER PIPING .................................................................................................7
Domestic Side Piping ...........................................................................................................7
Boiler System Piping............................................................................................................9
Solar System Piping..............................................................................................................9
FIELD WIRING.................................................................................................................14
TPI Thermostat Wiring.......................................................................................................14
TPI and Boiler Controls......................................................................................................16
START UP AND CHECK OUT........................................................................................18
ANNUAL MAINTENANCE AND INSPECTION...........................................................18
PARTS LIST......................................................................................................................19
TROUBLESHOOTING .....................................................................................................19
HAZARD SYMBOLS AND DEFINITIONS
Danger Sign: Indicates a hazardous situation which, if not avoided, w
result in serious injury or death.
Warning Sign: I
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 Indirect Water Heater 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.
S-SR Series
S Series
SL Series
Trin & Stor
│
Installation and Operation Instructions Indirect Water Heaters
1.0 INTRODUCTION
NTI offers three (3) diversified series of Indirect Water Heaters: "S" Series consists of a high performance
stainless steel tank and heat exchanger coil, "SL" Series offers a high mass stone lined tank and finned copper
heat exchanger coil, and "S-SR" Series consists of a stainless steel tank with dual heat exchanger coils. The S-SR
Series comes equipped with a Solar Domestic Hot Water backup via a second heat exchanger coil for boiler
supply connections ("S-SR" models). The "S-SR" series can also be used with a single boiler as a normal indirect
or with a second boiler for increased recovery rate. For the complete NTI Trin & Stor line, visit
www.nythermal.com.
Trin & Stor Specifications
Table 1-1 Indirect Water Heater Specifications
Hour 1 Recovery
(Gal @ Outlet Temp)
1
140 °°°° F 115 °°°° F
Model
Storage
Capacity
(
US Gal
Type
)
Weight (lbs)
Empty
Filled
S40 40 66 485 228 303 146 6.9 4.1 196 271
S50 53 82 655 238 313 146 6.9 4.1 196 271
S80 79 170 995 356 468 210 10.4 11.3 292 404
S120
119
S80SR
S120SR
119
SL35 35 185 477 230 300 150 6.0 7.0 195 265
SL50 50 238 656 250 320 150 6.0 7.0 200 270
SL70 70
Notes:
1
Ensure the location chosen for the tank is capable of supporting the tank when filled with water.
2
Refer to Table 1-3 for a list of considerations when selecting a location for the tank.
3
Hour 1 Recovery based on 50oF inlet water temperature and 200oF boiler water outlet temperature.
Stainless
Steel
Indirect
183 1275 485 636 290 13.6 26.5 392 542
Stainless
79 180 840
Steel
Solar
Indirect
195 1190
Stone
Lined
Indirect
290 875 270 340 150 6.0 7.0 200 270
214 157 4.6 182 291
274 166
239 Upper 167 Upper
274 Lower 177 Lower
Table 1-2 Indirect Water Heater Characteristics
Attribute S Series
Tank 1
stainless steel stainless steel stone lined
Coil stainless steel stainless steel copper finned
Insulation EPS foam EPS foam EPS foam
Jacket gray plastic gray plastic gray plastic
Recommended
Service
Clearances
top 12" top 12" top 36"
connection side 12" connection side 12" connection side 12"
boiler connections as required boiler connections as required
MAWP 150 psi MAWP 150 psi MAWP 150 psi
Restrictions Max tank temp 190oF Max tank temp 190oF Max tank temp 190oF
Max boiler temp 210oF Max boiler temp 210oF Max boiler temp 210oF
Notes:
1
Water used in the tank must meet the water chemistry limits specified in Table 2-1. Levels outside the limits may
corrode the tank and shorten its life resulting to damage to tanks and voiding the warranty.
3
Boiler
Output
(
MBH
220 10.4
290 13.6
S-SR Series
Coil Flow
Rate
)
(
GPM)
Coil
Drop
(Feet)
Continuous Rate
(GPH @ Outlet Temp)
140 °°°° F 115 °°°° F
4.8 193 307
7.6 194 Upper 310 Upper
8.0 205 Lower 328 Lower
SL Series
boiler connections
as required
2
Indirect Water Heaters
Installation and Operation Instructions
Trin & Stor
I.O.M. Checklists
The various Installation, Operation and Maintenance (IOM) Checklists contained in this manual are meant to be
read in conjunction with the details, drawings and safety information to ensure a complete and proper installation.
Pre-Installation Checklist
Inspection and Preparation
1. Remove packaging. Inspect for damage during shipping.
2. Package contents should contain the following:
Indirect Water Heater (verify correct model number)
Plastic lid, screws, and insulation (applicable to "SL" Series only)
Temperature and Pressure Relief Valve (150psi)
TPI Thermostat
Brass tee, ¾” (applicable to "SL" Series only)
Locating the Tank
1. Solid foundation, dry location, near boiler.
2. Leave room to service water heater and controls (coil can be removed from the top of the "SL" series tanks).
3. Sufficient room for boiler piping and servicing boiler.
4. Area free of flammable liquids or combustible vapors.
5. Install where leaks will not damage property.
6. Locate in room where temperature never drops below 50oF (10oC).
Water Damage Protection
1. Make provisions to protect the surrounding area from water damage should a leak occur from the tank, fitting
connections, or relief valve.
2. If the area surrounding the tank location is susceptible to water damage, install a catch pan c/w drain under the
tank.
General Information
1. Review system specifications and characteristics.
2. Know the Water Chemistry and Warranty requirements.
3. Be informed of potential hazards associated with DHW.
DOs & DON’Ts
1. DO NOT install water heater close to high temperature appliances or wood stoves as water heater jacket is
combustible.
2. DO NOT install where there is a risk of property damage in the event of an eventual leak at some
unpredictable time.
3. DO support the entire tank bottom with ¾" plywood (min) if elevating off the floor with blocks.
3
Trin & Stor
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Installation and Operation Instructions Indirect Water Heaters
General Installation Requirements
Generalized instruction and procedures cannot anticipate all situations. For this reason, only a qualified installer
should perform the installation.
Users Responsibility – This manufacturer anticipates the proper installation and care in use of the product. As
with any hot water system, there is a risk of property damage and personal injury inherent in the use. NTI cannot
supervise the installation and therefore makes it a specific condition for the warranty that the customer will
supervise the installation and use of the product to be sure they are performed in accordance with the instructions
and I.O.M. Checklists in this manual. It is the User’s responsibility to maintain the appliance by having it
inspected on an annual basis, serviced as required, and to use the product for the purpose it was intended.
Installers Responsibility – A qualified installer is a licensed person who has appropriate training and a working
knowledge of the applicable codes, regulations, tools, equipment and methods necessary to install an indirect
water heater and heating boiler required to heat it. The Installer assumes all responsibility for a safe installation
and that it meets the requirements of this document, as well as National and local codes.
Consider the following when selecting a location for the Indirect Water Heater: All tanks will eventually leak at
some unpredictable time, so take precautions and use a catch pan with a drain beneath the water heater to contain
potential leaks or install the tank in a location not susceptible to water damage. Do not install near a wood stove
where excessive heat could melt the water heater’s plastic jacket. Boiler supply piping, floor drain locations,
relief valve discharge will also need to be considered before selecting a location.
Scope of Instruction - This document pertains to the correct installation and operation of
the NTI Trin & Stor Indirect Water Heater line, exclusively series "S" and "SL". This
manual DOES NOT provide installation instructions for heating system boilers; therefore, installers must refer
to the boiler manufacturers instructions for boiler installation procedures.
Emergency Situation - Should the water heater be subject to flood, fire or other
damaging conditions, turn the power and water to the heater off. DO NOT place water
heater in operation again until it has been thoroughly checked by qualified service personnel.
Code Requirements - The installation of your NTI Trin & Stor Indirect Water Heater
must conform to the requirements in this manual, as well as National and local codes.
Intended Purpose - This appliance is not intended to convey or dispense water for
human consumption such as drinking or cooking.
Annual Service - Failure to have the Indirect Water Heater properly serviced and
inspected on a regular basis by a qualified service technician may result in property
damage, serious injury or death.
Flammable Vapors - Do dot install this appliance in any location where gasoline,
flammable vapors are air-born contaminants are likely to be present.
Warranty Requirements - Improper installation, use, neglect or abuse of this product
will not only jeopardize the safe operation of this appliance but also void the warranty.
Be Informed - Read and understand this manual prior to proceeding with the installation
of the Trin & Stor Indirect Water Heater. Failure to follow the instructions outlined in
this document will result in property damage, serious injury or death.
4
Indirect Water Heaters
Installation and Operation Instructions
Trin & Stor
Safe Temperatures for Potable Water
Two factors used to determine safe hot water temperatures are Legionella and scalding. Potable water needs to
be stored at temperatures hot enough to limit the growth of Legionella, yet be cool enough to prevent scalding.
Since both hazards present a potential risk to the user, they must be monitored and controlled. Table 1-3
indicates how water temperature affects Legionella bacteria and contributes to scald injury. Use of a thermostatic
mixing valve in the indirect water heater plumbing system can help protect against both of these hazards. By
storing potable water at higher temperatures, bacteria growth is controlled, while still providing high temperature
water for dishwasher applications and low temperature water for bathing. Before proceeding, read the following
carefully and take all necessary pre-cautions to avoid potential illness and/or injury that can result from
Legionella or scalding hazards.
Legionella Hazard - This bacteria is naturally occurring in surface water and ponds. It
can also be found in man-made water systems around the world such as water storage
tanks, water distribution systems, fountains, hot tubs, humidification systems, refrigeration systems and grocery
produce misters. Health authorities agree that Legionella bacteria most often enter the lungs due to aspiration
when contaminated water spray is breathed in as opposed to ingesting drinking water contaminated with the
bacteria. Typical illnesses attributed to Legionella include flue like symptoms (Pontiac Fever) and a potentially
fatal type of pneumonia (Legionnaires’ disease). Failure to follow instructions may result in illness or death.
Contributing Factors to Legionella - Experts acknowledge that Legionella is an identified risk in most water
systems. Although eradicating Legionella is improbable, pre-cautions can be taken to control and monitor
conditions that promote bacteria growth. According to the World Health Organization (WHO); American
Society of Heating, Refrigeration, and Air-conditioning Engineers (ASHRAE); Canada Safety Council (CSC);
and Centers for Disease Control (CDC), contributing factors to the growth of Legionella in potable water
systems include:
• Minerals and nutrients present in the source water and systems materials
• Stagnation or low flow characteristic of dead ends in distribution piping systems and storage tanks
• Scale, corrosion, and bio film
• Tepid water in cold water lines
• Water storage temperatures optimal for bacteria growth
• Chlorine concentration
Scald Hazard - Hotter water increases the risk of scald injury. There is a hot water scald
potential if the storage tank thermostat is set too high. Before changing the temperature
setting on the tank thermostat, refer to the thermostat manufacturers recommended settings. Failure to follow
these instructions may result in serious injury or death.
A scald injury can occur when hot steam or liquid makes contact with one or more layers
of skin. Scald severity (degree of burn) is directly impacted by exposure time and
temperature. Refer to Table 1-4. The following basic precautions are common sense:
• Young children and elderly adults burn more quickly and should use cooler water.
• Never leave a child alone while drawing water in a bathtub.
• Test the water temperature before bathing or showering.
• Turn cold water on first, then add hot water until the temperature is comfortable.
Thermostatic Mixing Valve - When the system requires water at temperatures higher
than required for other uses, such as high temperature applications typically greater than
46oC (115oF), a means such as a thermostatic mixing valve shall be installed to temper the water for those uses
in order to reduce scald hazard potential. Anit-scald devices such as a thermostatic mixing valve allows potable
water to be stored at a higher temperature to limit bacteria growth, and allows water at the tap to be delivered at
a lower temperature to prevent scalds. Failure to follow these instructions may result in serious injury or death.
This appliance is not intended to convey or dispense water for human consumption such
as drinking or cooking.
5
Trin & Stor
│
Installation and Operation Instructions Indirect Water Heaters
Legislation and Guidelines - At the time this document was written, standards and
guidelines regulating the prevention of Legionella in the United States and Canada were
mostly voluntary. The American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
(ASHRAE) is currently in the process of converting its guideline entitled "Minimizing the Risk of Legionellosis
Associated with Building Water Systems" (ASHRAE Guideline 12-2000) into an official standard. Consult with
your local authorities as to recommended guidelines for controlling Legionella in potable water systems.
Storing water at temperatures >140°F may not be permitted in some States, so check with
the authorities having jurisdictions. In Canada, recent changes to the National Plumbing
Code requires that domestic hot water be stored at or above 61oC (140oF) and then mixed down to safe
temperatures at the tank outlet.
General Guidelines - In the absence of a National standard or local codes, the following are general guidelines
for “good practice” on maintaining, monitoring and operating your potable water system:
• Store domestic hot water at temperatures > 61oC (140oF).
• Store and distribute cold water at temperatures below 20oC (68oF).
• System supply for uses other than high temperature applications typically greater than 46oC (115oF) shall be
equipped with a thermostatic mixing valve on the hot water outlet to reduce potential scald hazards.
• Clean aerators and nozzles on water fixtures on a regular basis to reduce scale build-up.
• Clean storage tanks and remove sediment. Flush storage tanks and piping systems regularly for 10-30
minutes at high water temperatures (depending on guidelines used) to rid the system of sediment and scale
that develops, typically in the bottom of storage tanks where water temperature is coolest; and piping runs
where water can stagnate.
• Abandoned water lines should be capped off at the distribution main, not at the most convenient place.
• Avoid dead-ends in piping system. If unavoidable, provide a drainage port in these areas at the lowest point
to flush out stagnant water regularity.
• Insulate Domestic Hot Water recirculation lines and keep pipe runs as short as possible.
• Recommend annual water testing of water in your tank and piping system(s) to monitor water conditions.
• Keep a maintenance record of when your indirect water heater and storage tank were cleaned, piping
systems flushed and who did the service work.
Table 1-4 How Water Temperature relates to Legionella and Scald Hazard
Water Temperature
158-176oF 70-80oC Disinfection range 158oF 70oC 1 second - 2nd or 3rd degree burn
140-149oF 60-65oC Bacteria die within minutes 140oF 60oC 5 seconds - 2nd or 3rd degree burn
122-131oF 50-55oC Bacteria die within hours 131oF 55oC 5 seconds - 1st degree burn
68-113oF 20-45oC Bacteria thrive and multiply 122oF 50oC 1 minute - 1st degree burn
below 68oF below 20oC Bacteria is dormant 111oF 44oC 5 hours - 1st degree burn
Notes:
1
Published by Chartered Institute of Plumbing and Heating Engineering, Databyte series, "Safe Hot Water Temperatures".
2
The elderly and small children are susceptible to bad burns at shorter exposure times than listed in this table.
3
A thermostatic mixing valve should be installed on DHW storage tanks when outlet temperatures exceed 115oF [46oC].
4
Typical water temperature for bathing or showering range between 98-113oF [37-45oC].
5
Temperature-Time-Burn Chart published by John Hopkins University, excluding notes.
1
Legionella Bacteria 1
Water Temperature
2,5
Exposure Time vs Burn 5
3,4
6
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