Pure-Pro TL-Pro 175C Owner's manual

Installation and Operation instructions
INDOOR MODEL
TL-Pro 175C/199C
Warning: If the information in this manual is not followed exactly,
a fire or explosion may result causing property damage, personal
injury or death.
Do not store or use gasoline or other flammable vapors and liq-
uids in the vicinity of this or any other appliance.
Installation and service must be performed by a trained and cer-
tified installer, service agency or the gas supplier.
Improper installation, adjustment, alteration, service or mainte-
nance can cause injury or property damage. Refer to this man-
ual. For assistance or additional information consult a qualified
installer, service agency or the gas supplier.
Upon completion of the installation, these instructions should
be handed to the user of the appliance for future reference.
What to do if you smell gas
• Turn off the gas shut-off valve. Open windows and doors.
• Do not try to light any appliance.
• Do not touch any electrical switch, telephone, and do not use
outlets.
• Extinguish all open flames. Do not smoke! Do not use lighters!
• Warn all occupants of the building. Do not ring doorbells!
• If you can hear gas leaking, leave the building immediately.
Prevent others from entering the building and notify the
police and fire department from outside the building.
• From outside the building, call the gas utility company and a
trained and certified installer.
TL-Pro 175/199 C - Natural Gas
TL-Pro 175/199 C- Propane (LP Gas)
Temperature Modulated with Electronic Ignition Suitable for heating potable water and space heating
(Intended for variable flow applications)
6 720 821 954 (2017/06) US

Table of contents
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
2
Table of contents
1 Key to symbols and safety instructions . . . . . . . . . . . . . . . . . . . 3
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 FCC rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Appliance details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Specifications (Technical data) . . . . . . . . . . . . . . . . . . . . 8
3.3 Unpacking the heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 General rules to follow for safe operation . . . . . . . . . . 10
3.5 Dimensions and minimum installation clearances . . . 11
4 Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Specialized tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 Combustion air requirements . . . . . . . . . . . . . . . . . . . . 27
4.5 Proper location for installing your heater . . . . . . . . . . 28
4.6 Heater placement and clearances . . . . . . . . . . . . . . . . 28
4.7 Hanging appliance on the wall . . . . . . . . . . . . . . . . . . . 28
4.8 Mounting installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.9 Gas piping & connections . . . . . . . . . . . . . . . . . . . . . . 30
4.10 Water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.11 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.12 Filling the condensate trap . . . . . . . . . . . . . . . . . . . . . . 34
4.13 Domestic hot water recirculation . . . . . . . . . . . . . . . . . 35
4.14 Space heating applications . . . . . . . . . . . . . . . . . . . . . . 35
4.15 Measuring gas pressure . . . . . . . . . . . . . . . . . . . . . . . . 37
5 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.1 Electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2 Position of the fuses in control unit . . . . . . . . . . . . . . . 38
6 Operation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.1 Description LCD Display . . . . . . . . . . . . . . . . . . . . . . . . 39
6.2 For your safety read before operating
your water heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.4 Temperature selection . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.6 Reset button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.7 Program button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.8 Locked condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7 Maintenance and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.1 Annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2 Winterizing for seasonal use . . . . . . . . . . . . . . . . . . . . . 42
7.3 Mineral scale build-up . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.4 Condensing heat exchanger unit . . . . . . . . . . . . . . . . . 43
7.5 Adjusting CO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.6 Program values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.7 Control board diagnostics . . . . . . . . . . . . . . . . . . . . . . 46
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.2 Burner does not ignite when hot water is turned ON . . 48
8.3 Water is too hot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.4 Water is not hot enough . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.5 Low water flow/pressure . . . . . . . . . . . . . . . . . . . . . . . . 48
8.6 Hot water temperature fluctuates at tap . . . . . . . . . . . . 49
8.7 Noisy burner/heater during operation . . . . . . . . . . . . . . 49
9 Problem solving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.1 Error code diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . 50
10 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
11 Sensor resistance charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
12 Functional scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
13 Interior components diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 56
13.1 Interior components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
14 Protecting the environment . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
15 LIMITED TANKLESS HEATER WARRANTY . . . . . . . . . . . . . . . . 58
16 Installer Checklist to be completed by installer upon
installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Key to symbols and safety instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 3
1 Key to symbols and safety instructions
1.1 Key to symbols
Warnings
The following keywords are defined and can be used in this document:
•NOTICE indicates that damage to property may occur.
•CAUTION indicates that personal injury may occur.
•WARNING indicates that severe personal injury may occur.
•DANGER indicates that severe personal injury or death may occur.
Important information
Additional symbols
1.2 Safety instructions
Read all instructions before installing. Perform the
steps in the indicated sequence. Have the water
heater inspected by a trained service technician at
least once every year. Failure to comply with these
instructions can result in severe, possibly fatal,
personal injury as well as damage to property and
equipment.
Installation and servicing
▶Risk of fire when soldering and brazing!
Take appropriate protective measures when
soldering and brazing around combustible and
flammable material.
▶ Ensure that only a licensed contractor installs or
services the water heater.
▶ On hot components use only material with
adequate temperature stability.
Installation and commissioning
▶ In the Commonwealth of Massachusetts, the water
heater must be installed by a licensed plumber.
▶ Do not install this device in rooms with a high
moisture level (e.g. bathrooms, saunas).
Function
▶ To ensure that the water heater functions properly,
follow these installation and maintenance
instructions.
▶ Never close the blow-off line of the T&P safety
valve. For safety reasons, water may escape during
heating.
If you smell gas
▶ Turn off the gas shut-off valve.
▶ Open windows and doors.
▶ Do not try to light the appliance.
▶ Do not touch any electrical switch, telephone, and
do not use outlets.
▶ Extinguish all open flames. Do not smoke! Do not
use lighters!
▶ Warn all occupants of the building. Do not ring
doorbells!
▶ If you can hear gas leaking, leave the building
immediately.
▶ Preventothersfrom entering the building and notify
the police and fire department from outside the
building.
▶ From outside the building, call the gas utility
company and a trained and certified installer.
If you smell flue gas
▶ Switch off the appliance.
▶ Open windows and doors.
▶ Inform a trained and certified installer.
Insufficient ventilation may cause toxic flue gas to
escape. Risk of poisoning.
▶ Never close off or reduce the size of the air intake
and outlet openings.
▶ The appliance must not be operated until any
obstructions have been removed.
▶ Inform the system operator in writing of the
problem and the associated dangers.
Danger from escaping flue gases
▶ Ensure all vent pipes and chimneys are not
damaged or blocked.
▶ Connect only one appliance to each vent system or
chimney liner.
▶ The venting system piping must not feed into
another air extraction duct.
▶ Do not route the flue system piping through or
inside another air extraction duct.
Warnings in this document are identified by a warning
triangle printed against a grey background.
Keywords at the start of a warning indicate the type and
seriousness of the ensuing risk if measures to prevent
the risk are not taken.
This symbol indicates important information where
there is no risk to people or property.
Symbol Explanation
▶ Step in an action sequence
Cross-reference to another part of the document
• List entry
– List entry (second level)
Table 1

Key to symbols and safety instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
4
Danger of explosion of flammable gases
▶ Work on gas components may only be carried out
by a trained and certified installer.
▶ Installation, gas and flue connection, initial
commissioning, electrical connections and annual
maintenance must only be carried out by a trained
and certified installer.
Combustion air
▶ Keep the combustion air free of corrosive
substances (halogenated hydrocarbons that
contain chlorine or fluorine compounds).
Never shut off safety valves!
▶ Water may escape from the safety valve at any time
when the water is being heated.
Inspection/maintenance
▶ Servicing and repairs may only be carried out by a
trained and certified installer.
▶ Immediately correct all faults to prevent system
damage.
▶ Use only PurePro spare parts! Damage caused by
the use of parts not supplied by PurePro may void
the warranty.
Instruct the customer
▶ Explain to the customer how the appliance works
and how to operate it.
▶ Inform the customer that he/she must not carry out
any alterations or repairs.
Danger from electric shock
▶ Ensure that only an authorized contractor performs
electrical work.
▶ Before performing electrical work, disconnect the
power and secure the unit against unintentional
reconnection.
▶ Ensure the system has been disconnected from the
power supply.
Risk of scalding at the hot water draw-off point
▶ When the water heater is in operation,
temperatures in excess of 122 °F (50 °C) can
occur. To limit the temperature at the tap, install a
thermostatic DHW mixing valve.
▶ Water heated for washing the laundry, dishes and
for other cleaning purposes can cause scalding and
permanent injuries.
▶ Children, elderly, and handicapped persons are
more likely to be permanently injured by hot water.
Never leave such individuals in the tub or shower
unattended under any circumstances. Children
must not be allowed to operate hot water faucets
themselves or to fill a bathtub.
▶ If the building has occupants in the above groups
who operate hot water faucets, or state laws / local
ordinances stipulate specific water temperatures,
take the following precautions:
– Use the lowest possible temperature setting.
– To prevent scalding, install a tempering device,
such as an automatic mixing valve, at hot water
tap or water heater. Select and install the
automatic mixing valve in accordance with the
valve manufacturer's recommendations and
instructions.
▶ Water exiting from drain valves can be extremely
hot. To avoid injuries:
– Check that all connections are tight.
– Direct exiting water away from people.
▶ Measures must be taken to protect against
excessive temperature and pressure! Installation of
a T&P safety valve is required.
To protect against corrosion and ensure compliance
with the rules for electrical safety, observe the
following points:
▶ Usemetal fittings for potablewater heating systems
with plastic piping.
▶ Use only original accessories from the
manufacturer.
▶ When installation of the water heater is complete,
inspect the ground conductor (including metal
fittings).
Maintenance
Customers are advised to:
▶ Sign amaintenance and inspection contract with an
authorized contractor. Inspect and maintain the
water heater as necessary on a yearly basis. Service
as needed.
▶ Use only genuine spare parts.
Flooding
▶ After a flood, do not use the appliance if any part
has been submerged. Damage to appliances that
have been submerged can be quite severe and pose
numerous safety risks.
▶ Every appliance that has been submerged must be
replaced.

Key to symbols and safety instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 5
For your safety
▶ Do not store or use gasoline or other flammable,
combustible or corrosive vapors and liquids in the
vicinity of this or any other appliance.
DANGER: Fatal accidents!
Carbon monoxide poisoning.
▶ Carefully plan where you install the
heater. Correct combustion air supply
and flue pipe installation are very
important. If a gas appliance is not
installed correctly, fatal accidents can
result such as carbon monoxide
poisoning or fire.
DANGER:
Carbon monoxide poisoning.
▶ Exhaust gas must be vented to outside
using approved vent material.See table
5, page 13 (In Canada use only
ULCS636 approved material). Vent
and combustion air connector piping
must be sealed gas-tight to prevent flue
gas spillage, carbon monoxide
emissions and risk of fire, resulting in
severe personal injury or death.
Approved vent terminations must be
used when penetrating to the outside.
DANGER: Electric shock!
▶ Field wiring connections and electrical
grounding must comply with local
codes, or in the absence of local codes,
with the latest edition of the National
Electric Code, ANSI/NFPA 70, or in
Canada, all electrical wiring must
comply with the local codes and the
Canadian Electrical Code, CSA C22.1
Part 1.
DANGER: Electric shock!
Shock hazard: line voltage is present.
▶ Before servicing the water heater,
unplug power supply cord from outlet.
Failure to do so could result in severe
personal injury or death.
WARNING: Damage to the appliance from over
pressure.
▶ The heater must be disconnected from
thegas supply piping system during any
pressure testing of that system at test
pressures equal to or more than 0.5
psi.
NOTICE:
▶ The appliance should be located in an
area where leakage of the heater or
connections will not result in damage to
the area adjacent to the appliance or to
lower floors of the structure. When
such locations cannot be avoided, it is
recommended that a suitable drain
pan, adequately drained, be installed
under the appliance. The pan must not
restrict combustion air flow.
WARNING:
▶ The maximum inlet gas pressure must
not exceed the value specified by the
manufacturer and the minimum value
listed is for the purpose of input
adjustment.
NOTICE:
▶ If a water heater is installed in a closed
water supply system, such as one
having a backflow preventer in the cold
water supply line, means shall be
provided to control thermal expansion.
Contact the water supplier or local
plumbing inspector on how to control
this situation.
WARNING: Fire danger!
▶ Keep appliance area clear and free from
combustible materials, gasoline and
other flammable vapors and liquids.
NOTICE:
▶ Do not obstruct the flow of combustion
and ventilation air.
NOTICE: Appliance malfunction!
▶ If power is lost while appliance is
operating. Turn off both water and
power for 15 seconds to reset device.

FCC rules
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
6
2 FCC rules
FCC: This device complies with Part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
Fig. 1
The chart below shows the relationship between water temperature and
time until there is a risk of scalding. It can be used as the basis for
determining the safest water temperature for your application.
WARNING: Risk of scalding and property damage.
▶ Precautions must be taken prior to
manually operating the relief valve to
avoid contact with hot water
discharged from the relief valve and to
prevent water damage.
NOTICE: Appliance damage!
▶ Label all wires prior to disconnection
when servicing controls. Wiring errors
can result in improper and dangerous
operation.Verifyproperoperationafter
servicing.
WARNING: System damage!
▶ If a relief valve discharges periodically,
this may be due to thermal expansion in
a closed water supply system. Contact
the water supplier or local plumbing
inspector on how to correct this
situation. Do not plug the relief valve.
WARNING: Property damage!
▶ If the water heater is used in a space
heating application, all piping and
components connected to the water
heater must be suitable for use with
potable water.
WARNING: Personal Injury from toxic chemicals.
▶ Toxic chemicals, such as those used for
boiler treatment, shall not be
introduced into the potable water used
for space heating.
WARNING: Personal Injury from toxic chemicals.
▶ A water heater which will be used to
supply potable water shall not be
connected to any heating system or
component(s) previously used with a
nonpotable water heating appliance.
Temperature Time to severe scalding1)
1) Source: Moritz, A.R. and Henriques, F.C., Jr. (1947). Studies of thermal injury.
II. The relative importance of time and surface temperature in the causation of
cutaneous burns, Am J of Pathol, 23, 695-720.
120 °F (48 °C) longer than 5 minutes
125 °F (51 °C) 1.5 to 2 minutes
130 °F (54 °C) approx. 30 seconds
135 °F (57 °C) approx. 10 seconds
140 °F (60 °C) less than 5 seconds
145 °F (62 °C) less than 3 seconds
150 °F (65 °C) approx. 1.5 seconds
155 °F (68 °C) approx. 1 second
Table 2 Approximate time-temperature relationship until there is a risk
of scalding

Appliance details
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 7
3 Appliance details
3.1 Features
Parts
• Key Pad interface control.
• High power pre-mix compact burner with low NOx emissions.
• Modulating Gas Valve with constant gas:air ratio control.
• Modulating water valve for improved comfort and temperature
control.
High quality materials for long working life
• Copper heat exchanger.
• High efficiency Ceramat Burner.
• Compact space saver: mounts on a wall with a supplied bracket.
Features
• Easily removable one-piece cover.
• On/Off and Temperature control switches.
• Reset button.
• Program button (Selectable temperature default).
• Failure codes for easy diagnostics and repair.
• Real-time diagnostics for troubleshooting/informational purposes.
• Built in freeze prevention.
Note: The freeze prevention kit is designed to provide protection for the
water heater down to approximately 5°F for short term conditions only.
It will not protect the appliance in areas where the temperature is
routinely expected to be below freezing.
- The freeze prevention kit will not protect plumbing outside the
appliance from freezing. Precautions should be taken.
PurePro is constantly improving its products, therefore
specifications are subject to change without prior
notice.

Appliance details
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
8
3.2 Specifications (Technical data)
Approved in US/Canada
Technical characteristics Units TL-Pro 175 C TL-Pro 199 C
Capacity
Maximum flow rate at a 45 °F (25 °C) rise GPM (l/min) 7.3 (27.6) 8.3 (31.4)
Maximum flow rate at a 55 °F (30.6 °C) rise GPM (l/min) 6.0 (22.6) 6.8 (25.7)
Maximum flow rate at a 75 °F (41.7 °C) rise GPM (l/min) 4.4 (16.5) 5.0 (18.8)
Maximum flow rate at a 90 °F (50 °C) rise GPM (l/min) 3.6 (13.8) 4.2 (15.7)
Maximum output BTU/hr (kW) 160,500 (47) 184,500 (54)
Maximum input BTU/hr (kW) 175,000 (51.2) 199,000 (58.3)
Uniform energy factor UEF 0.91 0.92
Minimum Input BTU/hr (kW) 19,900 (5.8) 19,900 (5.8)
Temperature Control
Selection range °F ( °C) 100 - 140 (38 - 60) 100 - 140 (38 - 60)
Default temperature °F ( °C) 122 (50) 122 (50)
Stability °F ( °C) 2 (1) 2 (1)
Gas Requirement
Gas connection inches ¾ " ¾ "
Peak load inlet gas pressure1)
1) To measure Gas Pressure, see Measuring Gas Pressure, chapter 4.15, page 37.
Propane water column 8” - 13” 8” - 13”
Natural Gas water column 3.5” - 10.5” 3.5” - 10.5”
Water
Hot water connection inches ¾ " ¾ "
Cold water connection inches ¾ " ¾ "
Minimum water flow2)
2) Activation varies with inlet water temperatures from 0.5 - 1.6 gallon/minute (1.9 - 6.1 l/m).
GPM (l/min) 0.5 (1.9) 0.5 (1.9)
Minimum recommended water pressure PSI (bar) 30 (2.07) 30 (2.07)
Minimum well pressure PSI 40 40
Water valve material Polymer (PPS) (Polypropylene Sulfide) Polymer (PPS) (Polypropylene Sulfide)
Connections: Bottom of heater Bottom of heater
Combustion
CO level ppm 290 (measured) 290 (measured)
CO2level (set from factory) % see table 47 see table 47
Dimensions
Depth inches (mm) 11 ¼ (286) 11 ¼ (286)
Width inches (mm) 17 7/8(452) 17 7/8(452)
Height inches (mm) 30½ (775) 30½ (775)
Weight pounds (kg) 74 (33.5) 74 (33.5)
Gas types
Natural Gas
LP Gas
Voltage
Nominal V AC 120 120
Frequency Hz 60 60
Amperage
Idle mA 40 40
Operation A 2.5 2.5
Noise db (A) 45 - 65 45 - 65
Water protection3)
3) Protection against water drops.
IP X4D X4D
Table 3
If appliance is installed at elevations above 2000ft, refer
to chapter 4.3.8 Fan speed adjustment.

Appliance details
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 9
Safety devices
• Flame failure device (ionization flame rod sensor)
• Overheat prevention (temperature limiter)
• Inlet temperature sensor
• Outlet temperature sensor
• Back flow temperature sensor
•Exhaustgastemperature sensor
3.3 Unpacking the heater
Before installing the unit, be certain you have the correct heater for
your type of Gas - Propane or Natural Gas. Identification labels are
found on the shipping box, and on the rating plate which is located on the
right side panel of the cover.
Fig. 2 Rating plate
[A] Serial number
[B] Type of gas
3.3.1 The box includes
• Tankless water heater
• Bracket for wall hanging the heater
• Exhaust vent adaptor (with 4 screws and gasket provided)
• Combustion air inlet adaptor (with 3 screws and gasket provided)
• Installation manual
• Energy Guide label
The TL-Pro 175/199 C is not approved or designed for:
•Boats or any mobile installation. (Modular homes are acceptable
for installation).
•Use above 8000 ft A.S.L. altitude (see page 23).
•Outdoor installation without installation of Outdoor kit.
Applications where inlet water temperature is higher than 140°F
(60°C). A 3-way valve or mixing valve must be installed before the
appliance if inlet water temperature exceeds this limit.
3.3.2 Remove front cover
▶ Loosen the two Phillips head screws located on bottom rear of cover.
Fig. 3 Loosen the two screws
▶ Lift front cover panel upward and remove.
Fig. 4 Remove the front cover

Appliance details
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
10
3.3.3 Remove combustion cover (service only)
▶ Open the four clips and remove the combustion cover.
Fig. 5 Remove the combustion cover
3.4 General rules to follow for safe operation
•1. You must follow these instructions when you install your heater. In
the United States: The installation must conform with local codes or,
in the absence of local codes, the National Fuel Gas Code ANSI
Z223.1/NFPA 54.
In Canada: The Installation must conform with CSA B149.(1,2)
INSTALLATION CODES and /or local installation codes.
•2. Carefully plan where you install the heater. Correct combustion air
supply and vent pipe installation are very important. If not installed
correctly, fatal accidents can occur, such as carbon monoxide
poisoning or fire.
•3. When the unit is installed indoors and ROOM SEALED (twin pipe)
it is permitted to be located in bathrooms, bedrooms and occupied
rooms that are normally kept closed. See chapter 4.3 (page 12). If
the unit will be installed indoors and use indoor combustion air, the
place where you install the heater must have enough ventilation. The
National Fuel Gas Codes do not allow UNSEALED gas fired water
heater installations in bathrooms, bedrooms or any occupied
rooms normally kept closed. See chapter 4.4 (page 27).
•4. You must correctly vent your heater. See chapter 4.3 (page 12) on
VENTING.
•5. The appliance and its gas connection must be leak tested before
placing the appliance in operation.
The appliance must be isolated from the gas supply piping system by
closing its individual manual gas shutoff valve (not supplied with
heater) during any pressure testing at pressures in excess of ½ Psig
(3.5 kPa).
•6. Keep water heater area clear and free from combustibles and
flammable liquids. Do not locate the heater over any material which
might burn.
•7. Correct gas pressure is critical for the proper operation of this
heater. Gas piping must be sized to provide the required pressure at
the maximum output of the heater, while all the other gas appliances
are in operation. Check with your local gas supplier, and see the
section on connecting the gas supply. See chapter 4.9 (page 30).
•8. Should overheating occur or the gas supply fail to shut off, turn off
the gas supply at the manual gas shut off valve, on the gas line. Note:
manual gas shutoff valve is not supplied with the heater but must be
field installed.
•9. Do not use this appliance if any part has been underwater.
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 underwater.
•10. Failure to install heater correctly may lead to unsafe operation
and void the warranty.

Appliance details
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 11
3.5 Dimensions and minimum installation clearances
Fig. 6 Dimensions
[1] On/Off button
[2] Reset button
[3] Program key
[4] LCD display
[5] Up button
[6] Down button

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
12
Fig. 7 Side view
4 Installation instructions
4.1 Specialized tools
The following specialized tools may be required for installation:
• Manometer
• Multi-meter
• Combustion Gas Analyzer
4.2 Introduction
Please follow these instructions. Failure to follow instructions may
result in:
▶ Damage or injury.
▶ Improper operation.
▶Lossofwarranty.
4.3 Venting
For servicing access, a 2ft clearance is recommended to
the front cover.
TL-Pro 175/199 C
TOP (A) 12”
FRONT (B) 1”
BACK 0”
SIDES 1”
FLOOR (C) 12”
Table 4 Recommended minimum clearances
DANGER:
▶ The water heater must be installed by a qualified
installer in accordance with these instructions. If
improperly installed, a hazardous condition such as
explosion or carbon monoxide poisoning could
result. Manufacturer is not responsible for
improperly installed appliances.
Common installation practice is to first determine the
venting/combustion air point of termination, then
design the piping layout back to the heater.
NOTICE:
▶ Do not reduce the exhaust or combustion air vent
pipe sizes.
▶ Do not common vent with any other vented appliance
or stove.
▶ Do not use Type-B vent as the actual exhaust vent
system for the appliance.
DANGER: Flue gas poisoning!
▶ Failure to vent the exhaust gases to the outside (see
table 5 for proper material) may result in dangerous
flue gases filling the structure in which it is installed.
NOTICE:
▶ In areas where outside temperatures routinely come
close to freezing, sealed combustion operation is
required. Concentric termination or separate
terminations for combustion and vent, must be
installed on the same wall or roof surface; however,
never facing the direction of prevailing winds. Failure
to do so may result in heat exchanger freezing and
bursting. This failure is not covered under the
manufacturer's warranty.
WARNING: Appliance malfunction!
▶ Protect the exhaust and inlet from leaves and debris
by installing a screen on the end of the termination.
¼ " mesh minimum opening recommended on
screen.

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 13
4.3.1 Vent options
The water heater is approved with the following venting options:
All combustion air and vent pipe materials and fittings must comply with
the following:
For specific questions concerning vent material, specifications,
usage or installation, please contact the vent manufacturer directly.
Fig. 8 PP Concentric up and out system
The concentric up and out vent system simplifies installations where the
water heater is mounted on an outside wall that can be direct vented
through that wall. This vent system only consists of the concentric
appliance adapter, one 90° elbow, and the termination, and can not be
extended further.
Concentric up and out kit
The concentric up and out system must be installed according to the
respective Installation Manual.
All vent connections must be glued, except for the PP vent systems, and
the exhaust adapter (chapter 4.3.4) which is screwed into place on
the top of the appliance. Slide the vent pipe into the exhaust adapter.
The exhaust pipe must be properly supported and must be pitched a
minimum of a ¼ inch per foot back to the appliance. This allows the
condensate to drain properly.
An optional concentric vent/air intake termination can be used for the
installation of a vertical or horizontal venting system when using PVC,
CPVC, or ABS (see fig. 9).
The concentric vent/air intake body can be ordered from your local
wholesaler.
The appliance can also be installed with separate air intake and exhaust
piping (see fig. 12, fig. 20 and fig. 21, page 20) in PP, PVC, CPVC, and
ABS. Generic PP twin pipe can be used if certified to ULC-S636 and only
with 90° elbow or T terminals. Maximum vent lengths and equivalent
lengths per tables 8 and 9 apply.
Fig. 9 Concentric vent kit example
[1] Exhaust
[2] Combustion air
[3] Roof boot/flashing (field supplied)
[4] Exhaust pipe
[5] Drain tee
[6] Intake pipe
[7] Concentric vent kit (239-44069-01)
[LA] Maintain 12 in. (18 in. for Canada) minimum clearance above
highest anticipated snow level maximum of 24 in. above roof
Item Material United States Canada
Vent
or
air
pipe
and
fitting
PP concentric single ULC-S636
certified only
PP common vent
PP twin pipe
PVC schedule 40 ANSI/ASTM D1785
PVC-DWV ANSI/ASTM D2665
CPVC schedule 40 ANSI/ASTM F441
ABS-DWV schedule ANSI/ASTM D2661
Pipe
cement
/ primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
ABS ANSI/ASTM D2235
Table 5 Approved vent material
The use of cellular core PVC (ASTM F891), cellular
core CPVC, or Radel® (polyphenolsulfone) in non-
metallic venting systems is prohibited.
Covering non-metallic vent pipe and fittings with
thermal insulation is prohibited.
Description Length Kit partno.and
quantity
239-44069-01
3- In. Rain Cap N/A 1
4- In. Diameter SDR-26 Pipe 24 In. long 1
3- In. Y
Concentric Fitting
N/A 1
2- ½ In. Diameter SDR-26 Pipe 37-1/8 in.
long
1
3- In. Condensate drain Tee N/A 1
1.5- In. Condensate drain bushing N/A 1
Table 6 PVC concentric vent part breakdown

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
14
4.3.2 Vent specifications
Establish vent clearances that comply with the vent manufacturer's
specifications and all applicable national/local codes.
Venting specifications
[*] ULC S636-95, UL1738 certified
Condensate drain requirements
When the Water Heater is installed in a residential single family dwelling
without direct recirculation an external condensate drain is not required.
If the Water Heater is installed in an application other than a residential
single family dwelling an external condensate drain (not supplied with
the Water Heater) is required in the following circumstances:
• Vertical terminating exhaust vent installations.
• Horizontal terminating exhaust vent installations greater than 6 feet
(1.8 m) linear measurement, (NOT total equivalent length).
• Vent installations where any section of the exhaust vent pipe passes
through an unconditioned space.
Note: An external condensate drain is recommended in all installations
as best practice in order to maximize the longevity of the Water Heater.
Minimum combustion air and exhaust pipe length
The minimum exhaust pipe length is 1 foot (0.3m) of straight vent pipe.
The minimum combustion air pipe length is one 90° elbow, except with
the Common Vent System where the provided air intake grill cap is used.
Maximum combustion air and exhaust pipe length
The following tables display the maximum allowable straight pipe
lengths for combustion air and exhaust piping with consideration to the
number of elbows used. Reduce the equivalent length for each elbow
used from the maximum allowable length depending on the system
used. Refer to table 8 if using 3" diameter venting. Refer to table 9 if
using 4" diameter venting. Refer to table 10 if using 2" diameter venting.
Use of elbows
It is recommended to limit the amount of elbows used in the exhaust and
combustion air piping to reduce friction in the air flow. The following lists
the maximum amount of 90° elbows allowed in either the exhaust or
combustion air piping:
Calculation example for 3" PVC, CPVC, or ABS venting:
Exhaust
Diam. Approved terminals
E
x
h
a
u
s
t
3 or 4 inches “T” terminal
2, 3 or 4 inches 90° elbow
3 inches PVC Flue Cap*(ECAP321)Vertical terminations
3" diameter only
3 or 4 inches Concentric
I
n
t
a
k
e
3 or 4 inches “T” terminal
2, 3 or 4 inches 90° elbow
3 inches PVC Flue Cap*(ECAP321)Vertical & horizontal
terminations approved 3" diameter only
3 or 4 inches Concentric
Table 7 Venting specifications for intake and exhaust
3" Venting Maximum
allowable
total vent
Length
Maximum
allowable
Exhaust
Length
Maximum
allowable
Intake
Length
Elbow
Equivalency
90° 45°
Twin pipe 62 ft 31ft 31ft 5 ft 2.5 ft
Concentric 46 ft 23ft 23ft 5 ft 2.5 ft
Table 8 Maximum Allowable Exhaust and Combustion Air Lengths for 3"
PP, PVC, CPVC, and ABS venting
4" Venting Maximum
allowable
total vent
Length
Maximum
allowable
Exhaust
Length
Maximum
allowable
Intake
Length
Elbow
Equivalency
90° 45°
Twin pipe 126ft 63ft 63ft 5ft 2.5ft
Concentric 86ft 43ft 43ft 5ft 2.5ft
Table 9 Maximum Allowable Exhaust and Combustion Air Lengths for 4"
PP, PVC, CPVC, and ABS venting
2" Venting Maximum
allowable
total vent
Length
Maximum
allowable
Exhaust
Length
Maximum
allowable
Intake
Length
Elbow
Equivalency
90°1)
1) If using 90° short sweep elbow equivalent length is 5 ft.
If using 90° long sweep elbow equivalent length is 2.5 ft.
45°
Twin pipe
with two
terminations
19ft 9.5ft 9.5ft 5 ft /
2.5 ft
2.5 ft
Table 10 Maximum Allowable Exhaust and Combustion Air Lengths for
2" PVC venting
Max. number of 90° elbows 3" venting 4" venting 2" venting
Twin pipe system 5 7 1 or 2 1)
1) If using 90° short sweep elbow the max. number is 1.
If using 90° long sweep elbow the max. number is 2.
Concentric system 4 7 _
Table 11
Two 45° elbows are equal to one 90° elbow. Any com-
bination of 45° and 90° elbows may be used in the
vent system as long as the combination does not ex-
ceed the maximum listed in table 11 above.
System used Concentric
Number of 90° elbows needed: 1
Number of 45° elbows needed: 2
Table 12
Calculation of example
Max. length 23’
90° elbow reduction - 5’
sub-total = 18’
45° elbow reduction - 5’
Total = 13’
Table 13

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 15
Combustion air
Calculation example for 4" PP, PVC, CPVC, or ABS venting:
Exhaust
Combustion air
Calculation example for 2" PVC venting:
Exhaust
Combustion air
For this example, the maximum allowable exhaust pipe
length is 13 feet.
System used Concentric
Number of 90° elbows needed: 2
Number of 45° elbows needed: 1
Table 14
Calculation of example
Max. length 23’
90° elbow reduction - 10’
sub-total = 13’
45° elbow reduction - 2.5’
Total = 11.5’
Table 15
For this example, the maximum allowable combustion
air pipe length is 11.5 feet.
System used Twin pipe
Number of 90° elbows needed: 1
Number of 45° elbows needed: 2
Table 16
Calculation of example
Max. length 63’
90° elbow reduction - 5’
sub-total = 58’
45° elbow reduction - 5’
Total = 53’
Table 17
For this example, the maximum allowable exhaust pipe
length is 53 feet.
System used Twin pipe
Number of 90° elbows needed: 2
Number of 45° elbows needed: 2
Table 18
Calculation of example
Max. length 63’
90° elbow reduction - 10’
sub-total = 53’
45° elbow reduction - 5’
Total = 48’
Table 19
For this example, the maximum allowable combustion
air pipe length is 48 feet.
System used Twin pipe
Number of 90° elbows needed: 1
Number of 45° elbows needed: 0
Table 20
Calculation of example
Max. length 9.5’
90° elbow reduction - 5’
sub-total = 4.5’
45° elbow reduction - 0’
Total = 4.5’
Table 21
For this example, the maximum allowable exhaust pipe
length is 4.5 feet.
System used Twin pipe
Number of 90° elbows needed: 0
Number of 45° elbows needed: 2
Table 22
Calculation of example
Max. length 9.5’
90° elbow reduction - 0’
sub-total = 9.5’
45° elbow reduction - 5’
Total = 4.5’
Table 23
For this example, the maximum allowable combustion
air pipe length is 4.5 feet.

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
16
Required direct vent terminal clearances (twin pipe / concentric penetration) for PVC, CPVC, ABS, and PP.
Fig. 10
[*] For clearances not specified in ANSI Z223.1 / NFPA 54 or CSA-B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing in accordance with section 2.20, or;
b) A reference to the following footnote:
“Clearance in accordance with local installation codes and the requirements of the gas supplier.”
Canadian installations1)
1) In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
U.S. installations2)
2) In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.
AClearance above grade, veranda, porch, deck or balcony 12 in. 12 in.
BClearance to window or door that may be opened 36 in. 12 in.
CClearance to permanently closed window * *
DVertical clearance to ventilated soffit located above the vent
termination within a horizontal distance of 2 feet (61cm) from
the center line of the termination
**
EClearance to unventilated soffit * *
FClearance to outside corner * *
GClearance to inside corner * *
HClearance to each side of center line extended above meter/
regulator assembly
36 in. within a height 15 feet above
meter/ regulator assembly
*
IClearance to service regulator vent outlet 36 in. *
JClearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other application
36 in. 12 in.
KClearance to mechanical air supply inlet 72 in. 36 in. above if within 10 feet
horizontally
LClearance above paved sidewalk or paved driveway located on
public property
84 in. 3)
3) A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
*
MClearance under veranda, porch deck or balcony 12 in. 4)
4) Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.
*
Table 24

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 17
Required other than direct vent terminal clearances (single pipe penetration) for PVC, CPVC and ABS systems.
Fig. 11
[*] For clearances not specified in ANSI Z223.1 / NFPA 54 or CSA-B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing in accordance with section 2.20, or;
b) A reference to the following footnote:
“Clearance in accordance with local installation codes and the requirements of the gas supplier.”
Canadian installations1) U.S. installations2)
AClearance above grade, veranda, porch, deck or balcony 12 in. 12 in.
BClearance to window or door that may be opened 36 in. 4 feet below or to side of opening;
1 foot above opening
CClearance to permanently closed window * *
DVertical clearance to ventilated soffit located above the vent
termination within a horizontal distance of 2 feet (61cm) from the
center line of the termination
**
EClearance to unventilated soffit * *
FClearance to outside corner * *
GClearance to inside corner * *
HClearance to each side of center line extended above meter/
regulator assembly
36 in. within a height 15 feet above
meter/ regulator assembly
*
IClearance to service regulator vent outlet 36 in. *
JClearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other application
36 in. 4 feet below or to side of opening;
1 foot above opening
KClearance to mechanical air supply inlet 72 in. 36 in. above if within 10 feet
horizontally
LClearance above paved sidewalk or paved driveway located on
public property
84 in. 3) 84 in.
MClearance under veranda, porch deck or balcony 12 in. 4) *
Table 25
1) In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code
2) In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code
3) A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
4) Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
18
4.3.3 Vent configuration examples for PP, PVC, CPVC, or ABS
systems
Below are approved examples of vertical and horizontal venting
installations.
Fig. 12 Vertical venting system (single pipe penetration)
[1] Drain tee (when required)
[2] Intake
[3] Exhaust
[LA] Maintain 12 in. (18 in. for Canada) minimum clearance above
highest anticipated snow level maximum of 24 in. above roof.
Fig. 13 Horizontal venting installation (combustion air piping not
shown)
[1] Termination
[2] Minimum above ground or normally expected snow accumulation
level
[3] Appliance
[4] Elbow (note: minimum 1ft of straight vent pipe required)
[5] Horizontal run ¼ " per foot down to termination
Fig. 14 Horizontal venting system (concentric vent)
[1] Exhaust
[2] Combustion air
[3] Exhaust pipe
[4] Drain tee (when required)
[5] Intake pipe
[LA] Minimum 1"
Fig. 15 Horizontal parallel venting system (twin pipe direct vent)
[A] 3 ft minimum (only when terminations are at the same height)
WARNING:
▶ Single pipe penetration should be used in non-
freezing climates only and steps must be taken to
ensure that adequate combustion air is available to
the water heater at all times!
NOTICE:
▶ The air intake connection on the concentric
termination can be oriented in any possible
direction.

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06) 19
Fig. 16 Vent and air intake pipe position of a sealed combustion system
[1] Intake
[2] Exhaust
[X] At least 1 foot (305mm)
Fig. 17 Horizontal venting system (single pipe penetration)
[1] Exhaust pipe
[2] Drain tee (when required)
[3] Intake pipe
[LA] Minimum 4"
4.3.4 Vent connections for PP, PVC, CPVC, and ABS systems
Attaching the exhaust and air inlet connection adaptors to the top of
the heater
▶ Attach the flue gas exhaust accessory to the top of the unit fig. 18
(position 1) using the 4 screws and gasket provided, and fully insert
vent pipe into the accessory.
▶ If using 4" venting, a 3" to 4" increaser should be installed directly
after this accessory. If using 2" venting, a 3" to 2" reducer should be
installed directly after this accessory. If using the PP twin pipe
system, adapters from the appliance adapter (3" PVC compatible) to
the PP system are needed.
Fig. 18 Exhaust connection
▶ Attach the combustion air inlet accessory to the top of the unit fig. 19
(position 2) using the 3 screws and gasket provided,and install 3" air
intake pipe over the accessory.
Fig. 19 Inlet connection
4.3.5 Connecting the condensate water drain
NOTICE: Risk of appliance freezing!
▶ Single pipe penetration should be used in non-
freezing climates only and steps must be taken to
ensure that adequate combustion air is available to
the water heater at all times!
Note: Adhesive backing needs to be removed prior to
installation.
NOTE: Vent pipe must be completely vertical when
inserting or blue gasket inside exhaust accessory can
become displaced. Exhaust accessory can be removed
with vent pipe attached to check gasket position.
NOTE: The combustion air accessory can be installed on
the top right or on the top left side of the heater. The
combustion air inlet that is not used must be kept sealed.
NOTICE: Risk of appliance freezing!
▶ Failure to properly install condensate drain can
damage the appliance and will void the warranty.

Installation instructions
TL-Pro 175/199 C – 6 720 821 954 (2017/06)
20
Appliance condensate drain installation
The appliance comes equipped with an internal condensate drain and
siphon. This drains condensation formed in the secondary heat
exchanger. Piping must be installed under the condensate drain outlet
on the water heater and piped for disposal in accordance with local
codes.
Fig. 20 Appliance drain installation
[1] Leave minimum ¼ " air gap
[2] Trap required
[3] 1 ½ " x ½ " PVC reducer
External condensate drain installation
If an external condensate drain (installer supplied) must be installed
(chapter 4.3.2), the following is recommended:
• 1. Install condensate drain ona horizontal section ofthe exhaust pipe
as close to the heater as possible.
• 2. The condensate must be disposed of according to local codes.
• 3. To install condensate drain in vent system, use PVC 3" X 3" X 1.5"
tee (part# 196278) and reduce for drain connection
Fig. 21 External condensate drain installation
[1] Condensate drain
[2] Dispose of condensate in accordance with local codes
[LA] Minimum 4"
4.3.6 Freeze prevention for PVC, CPVC, and ABS systems
In cold climates, components of a tankless water heater can freeze and
burst from negative draft. A leading cause of negative draft is
combustion appliances in the building not being supplied with sufficient
combustion air. A wood stove or furnace can pull its combustion air from
the water heater‘s vent pipe, allowing the cold incoming air to freeze the
cold water in the heat exchanger. Supplying more combustion air for all
combustion appliances is the solution. A HVAC specialist should be
consulted to design solutions for providing more combustion air.
Listed below is an additional measure designed to further limit backdraft
in extreme conditions assuming all other possible causes have been
addressed.
Backdraft reducer
The Heat Fab backdraft reducer (9301BFP) is the preferred option for
limiting backdraft (see fig. 22).
Note: The following solution is available only for 3" diameter
venting.
Fig. 22 Part # 9301BFP
NOTICE: Risk of appliance freezing!
▶ Do not install condensate drain tubing in areas where
it may freeze.
The condensate must be disposed of in accordance with
local codes.
See chapter 4.12 “Filling the condensate trap”.
Use materials approved by the authority having
jurisdiction. In the absence of other authority, PVC, and
CPVC pipe must comply with ASTM D1785, F441
orD2665. Cement and primer must comply with ASTM
D2564 or F493. For Canada, use CSA or ULC certified
PVC or CPVC pipe, fittings and cement, see table 5.
PP pipe must be certified under ULC S636.
6720608643-18.1V