Residential_tankless_infiniti_k_n1_indoor_iomanual_817_984 Residential Tankless Infiniti K N1 Indoor Iomanual 817 984

2018-10-17

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Installation and Operation instructions

INDOOR MODEL

Infiniti Tankless™ K-Series
Caution!
Improper installation, adjustment, alteration, service or maintenance can cause
injury or property damage. Refer to this manual. For assistance or additional information
consult a qualified installer, service agency or the gas supplier.
Notice!
Upon completion of the installation, these instructions should be handed to the user of
the appliance for future reference.
WARNING: If the information in these instructions 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 liquids
in the vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
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 department.
- Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
6720816815-38.1V

RTG-K-199/160N1 - 199,000/160,000 BTU/Hr - Natural Gas
RTG-K-199/160X1 - 199,000/160,000 BTU/Hr - Liquefied Petroleum (LP) Gas
Temperature Modulated with Electronic Ignition Suitable for heating potable water and space heating
(Intended for variable flow applications)
Featuring:

6 720 817 984 (2018/09) US

STEADISETTM Technology
and
SRTTM Scale Reduction Technology

Table of contents

Table of contents
6.7
1

Key to symbols and safety instructions . . . . . . . . . . . . 3
1.1
Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2
Safety instructions . . . . . . . . . . . . . . . . . . . . . . 3

Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Appliance details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2
Specifications (Technical data) . . . . . . . . . . . . 8
3.3
Unpacking the heater . . . . . . . . . . . . . . . . . . . 10
3.4
General rules to follow for safe operation . . . 11
3.5
Dimensions and minimum installation
clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1
Installation tools . . . . . . . . . . . . . . . . . . . . . . . 13
4.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3
Proper location for installing your heater . . . 13
4.4
Heater placement and clearances . . . . . . . . . 14
4.5
Hanging appliance on the wall . . . . . . . . . . . . 14
4.6
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.7
Factory regulation . . . . . . . . . . . . . . . . . . . . . 29
4.8
Gas piping & connections . . . . . . . . . . . . . . . 30
4.9
Water quality . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.10
Water connections . . . . . . . . . . . . . . . . . . . . 33
4.11
Domestic hot water recirculation
with external pump . . . . . . . . . . . . . . . . . . . . 34
4.12
Adjusting the recirculation settings . . . . . . . . 35
4.13
Recirculation with
the RTG-K-160/199N/X1 . . . . . . . . . . . . . . . 36
4.14
Space heating applications . . . . . . . . . . . . . . 36
4.15
Measuring gas pressure . . . . . . . . . . . . . . . . . 39

Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.1
Electrical power supply . . . . . . . . . . . . . . . . . 39
5.2
Position of the fuses in control unit . . . . . . . . 40

Operation instructions . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.1
For your safety read before operating
your water heater . . . . . . . . . . . . . . . . . . . . . 41
6.2
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.3
Error code reset . . . . . . . . . . . . . . . . . . . . . . . 41
6.4
Temperature selection . . . . . . . . . . . . . . . . . . 42
6.5
Information /Adjustments menu . . . . . . . . . . 43
6.6
Water valves calibration . . . . . . . . . . . . . . . . . 46

Gas type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Maintenance and service . . . . . . . . . . . . . . . . . . . . . .
7.1
Annual maintenance . . . . . . . . . . . . . . . . . . .
7.2
Winterizing for seasonal use . . . . . . . . . . . . .
7.3
Mineral scale build-up . . . . . . . . . . . . . . . . . .

48
48
49
49

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.2
Burner does not ignite when hot water
is turned ON . . . . . . . . . . . . . . . . . . . . . . . . . .50
8.3
Water is too hot . . . . . . . . . . . . . . . . . . . . . . . 51
8.4
Water is not hot enough . . . . . . . . . . . . . . . . 51
8.5
Low water flow/pressure . . . . . . . . . . . . . . . 51
8.6
Hot water temperature fluctuates at tap . . . 51
8.7
Noisy burner/heater during operation . . . . . 52
8.8
Error codes C1, C2, CF and/or CE . . . . . . . . 52
8.9
Error codes EA and/or EC . . . . . . . . . . . . . . . 52
8.10
Manifold gas pressure . . . . . . . . . . . . . . . . . . 53
8.11
Adjusting Gas/Air flow . . . . . . . . . . . . . . . . . 53
8.12
Factory default settings . . . . . . . . . . . . . . . . 56
8.13
CO emission check . . . . . . . . . . . . . . . . . . . . 56

Problem solving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.1
Error code diagnostics . . . . . . . . . . . . . . . . . 58

Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Sensor resistance charts . . . . . . . . . . . . . . . . . . . . . . 65

Software main menu structure . . . . . . . . . . . . . . . . . 66

Interior components diagram and parts list . . . . . . 67
13.1
Interior components . . . . . . . . . . . . . . . . . . . 67

Protecting the environment . . . . . . . . . . . . . . . . . . . 69

Installer Checklist to be completed by installer
upon installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

LIMITED TANKLESS HEATER WARRANTY . . . . . . . . 70

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Key to symbols and safety instructions

1.2

Key to symbols and safety instructions

1.1

Key to symbols

Warnings
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.
The following keywords are defined and can be used in this
document:
• DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
• WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
• CAUTION indicates a hazardous situation which, if not
avoided, could result in minor to moderate injury.
• NOTICE is used to address practices not related to
personal injury.
Important information
This symbol indicates important information
where there is no risk to people or property.

Additional symbols
Symbol Explanation
▶

Step in an action sequence



Cross-reference to another part of the document

•

List entry

–

List entry (second level)

Table 1

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.
▶ 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.
If you smell flue gas
▶ Switch off the appliance.
▶ Open windows and doors.
▶ Inform the certified installer who installed the appliance.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Key to symbols and safety instructions
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 customer 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, except for cascading installation.
▶ 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.
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 Bradford White spare parts! Damage caused by the
use of parts not supplied by Bradford White 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 fixture
▶ When the water heater is in operation, temperatures in
excess of 120 °F (49 °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, disabled and elderly people are at highest risk of
being scalded. Never leave such individuals in the tub or
shower unattended under any circumstances. Children
must not be allowed to operate hot water faucets
themselves.
▶ 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:
▶ Use metal fittings for potable water heating systems with
plastic piping.
▶ Use only original accessories from the manufacturer.
▶ When installation of the water heater is complete, inspect
and confirm proper ground conductor.

Maintenance
Customers are advised to:
▶ Inspect and maintain the water heater on a yearly basis.
Service as needed. See chapter 7.1.
▶ Only use 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.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Key to symbols and safety instructions
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 16 (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.

WARNING: Damage to the appliance from
over pressure.
▶ The heater must be disconnected from
the gas supply piping system during any
pressure testing of that system at test
pressures equal to or more than 0.5 psi
(14 W.C.).

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.

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.

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.

DANGER: Electric shock!
Shock hazard: line voltage is present.

WARNING: Fire danger!
▶ Keep appliance area clear and free from
combustible materials, gasoline and
other flammable vapors and liquids.

▶ Before servicing the water heater,
unplug power supply cord from outlet.
Failure to do so could result in severe
personal injury or death.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

NOTICE:
▶ Do not obstruct the flow of combustion
and ventilation air.

Safety information

NOTICE: Appliance malfunction!
▶ If power is lost while appliance is
operating turn off both water and power
for 15 seconds to reset device.

Safety information

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. Verify proper operation after
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.
Fig. 1
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.

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.
Temperature

Time to severe scalding1)

120 °F (48 °C)
125 °F (51 °C)
130 °F (54 °C)
135 °F (57 °C)
140 °F (60 °C)
145 °F (62 °C)
150 °F (65 °C)
155 °F (68 °C)

longer than 5 minutes
1.5 to 2 minutes
approx. 30 seconds
approx. 10 seconds
less than 5 seconds
less than 3 seconds
approx. 1.5 seconds
approx. 1 second

Table 2

Approximate time-temperature relationship until
there is a risk of scalding

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Appliance details

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.

WARNING:
CANCER AND REPRODUCTIVE HARM
WWW.P65WARNINGS.CA.GOV
AS REQUIRED BY THE STATE OF
CALIFORNIA PROPOSITION 65.

Accessories
• Neutralizer Kit
• Tank loading Aquastat (7736505665)
• Tank loading NTC (7736505666)
Bradford White is constantly improving its
products, therefore specifications are
subject to change without prior notice.

This Bradford White water heater complies with the State of
California Lead Law (AB1953).

Appliance details

3.1

Features

Parts
• Key Pad interface control.
• High power segmented burner with low NOx emissions.
• Modulating gas valve with pressure regulator.
• Modulating water valve.
• Active bypass water valve for quick response to changing
water flows.
• Burner power segmentation with modulation range from
1:22.
High quality materials for long working life
• Copper primary heat exchanger.
• Stainless Steel 316L condensing heat exchanger.
Features
• Compact space saver: mounts on a wall with a supplied
bracket.
• Easily removable one-piece cover.
• On/Off and Temperature touch control buttons.
• Reset function - Long press (> 3 sec.) the ON/OFF button.
• Programmable default temperature.
• Failure codes with message display for easy diagnostics
and repair.
• Real-time diagnostics for troubleshooting/informational
purposes.
• Built in freeze prevention.
• Integrated siphon to limit condensate freezing in external
condensate pipes.
• Available common vent kits, more information at
www.bradfordwhite.com.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Appliance details

3.2

Specifications (Technical data)

Approved in US/Canada
Technical characteristics

Units

Infiniti Tankless™ K-Series Infiniti Tankless™ K-Series
RTG-K-199N/X1
RTG-K-160N/X1

Capacity
Maximum flow rate at a 35 °F (19.4 °C) rise1)

GPM (l/min)

11.2 (42.4)

9 (34)

Maximum flow rate at a 45 °F (25 °C) rise

GPM (l/min)

8.7 (32.9)

7(26.7)

Maximum flow rate at a 55 °F (30.6 °C) rise

GPM (l/min)

7.2 (27.5)

5.8 (21.9)

Maximum flow rate at a 75 °F (41.7 °C) rise

GPM (l/min)

5.2 (19.7)

4.2 (15.9)

Maximum flow rate at a 90 °F (50 °C) rise

GPM (l/min)

4.4 (16.6)

3.5 (13.2)

Maximum output

BTU/hr (kW)

197 010 (57.7)

157 608 (46.2)

Maximum input2)

BTU/hr (kW)

199 000 (58.3)

160 000 (46.64)

> 99%

BTU/hr (kW)

9 000 (2.6)

°F ( °C)

100 - 1205) (38 - 49)

Default temperature

°F ( °C)

120 (49)

Temperature stability6)

°F ( °C)

 2 ( 1)

inches

¾"

Thermal efficiency (Efficiency in %)
Minimum Input3)
Temperature Control4)
Selection range

Gas Requirement
Gas connection
Peak load inlet gas pressure7)
Propane

water column

8" - 13"

Natural Gas

water column

3.5" - 10.5"

To assure maximum heat input at maximum vent length minimum gas pressure should be 5" W.C.(199kBtu) and 4" W.C. (160kBtu). For more
information see section 4.6.3.

Water
Top hot water connection NPT
Top cold water connection NPT

inches

¾"

inches

¾"

GPM (l/min)

0.45 (1.7)

Maximum water pressure

PSI (bar)

150 (10.3)

Minimum recommended water pressure

PSI (bar)

18 (1.2)

Minimum well pressure

PSI (bar)

30 (2.1)

Polymer (PPS)
(Polypropylene Sulfide)

ppm

 250 (measured)

see table 27

inches (mm)

9 27/32 (250)

Minimum water flow8)

Water valve material
Combustion
CO level
CO2 level (set from factory)
Dimensions
Depth
Table 3

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Appliance details
Technical characteristics

Units

Infiniti Tankless™ K-Series Infiniti Tankless™ K-Series
RTG-K-199N/X1
RTG-K-160N/X1

Width

inches (mm)

18 19/32 (471.5)

Height

inches (mm)

31½ (800)

Net weight

pounds (kg)

77.5 (35.2)

73.2 (33.2)

Gross weight

pounds (kg)

89.95 (40.8)

85.54 (38.8)
120

Electrical
Voltage

V AC

120

Frequency

Amperage (Idle)

Amperage (operation)

 2.7

Water protection9)

X4D

Table 3
1) These flows are based upon setting the unit to higher temperatures and then mixing down using cold water after the unit, to
reach these flows rates.
2) Input rating is based on sea level operation and need not be changed for operation up to 2000 ft (610 m) elevation. For
operation at elevations above 2000 ft (610 m), input rating is automatically reduced at the rate of 4 percent for each 1000 ft
(305 m) above sea level.
3) When converted to LPG the minimum input is 17 000 BTU/hr (5 kW).
4) With constant flow.
5) Can be reprogrammed to achieve up to 140 °F (60 °C) (see chapter 6.4).
6) Requirements: Steady flow, single unit installations, up to 140 °F (60 °C).
7) To measure Gas Pressure, see Measuring Gas Pressure, chapter 4.15, page 39.
8) Refers to activation point. Deactivation point is 0.35GPM (1.3 l/min).
9) Protection against water drops.
Safety devices
• Flame failure device (flame detection via ionization rod)
• Overheat prevention
• Inlet water temperature sensor
• Outlet water temperature sensor
• Exhaust flue gas temperature sensor
• Water flow sensor
• Air flow sensing technology (Combustion Management
System)
•

Scaling detection sensor (HE flue gas temperature sensor)

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Appliance details

3.3

Unpacking the heater

In preheated inlet water applications (i.e.
solar preheat), activation flow rate will vary
depending upon the unit set point, inlet
water temperature and the demand flow rate
thru the unit. Please consult Bradford White
for further details to determine if this will
function in your application.

The heater is default-set by the manufacturer to operate with
Natural Gas; for use with Liquid Propane, follow the conversion
instructions in section 6.7.1. Before commissioning the unit
be certain you have the heater correctly set 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 left side (when facing appliance front) of the cover.

3.3.2 Remove front cover
▶ Loosen two Phillips head screws located on the bottom of
the unit (fig. 3).

Fig. 2

Rating plate

[A] Serial number
[B] Type of gas (Natural gas by default)
3.3.1 The box includes
• Water Heater
• LP Conversion Kit
• Pressure relief valve
• Bracket and screws for wall hanging the heater
• Installation manual (manual can be downloaded at
www.bradfordwhite.com)

Fig. 3

Loosen two Phillips head screws

The RTG-K-199/160N/X1 is not approved or designed for:
• Manufactured (mobile) homes, boats or any mobile
installation. (Modular homes are acceptable for
installation).
• Use above 8000 ft A.S.L. altitude.
• Applications where inlet water temperature is higher
than 140 °F (60 °C) for Residential appliances or 180 °F
(82 °C) for Commercial appliances.
(In these applications a 3 way valve or thermostatic
mixing valve must be installed)
• Booster applications.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Appliance details
▶ Slowly open the front cover.

Fig. 4

Open front cover

▶ Disconnect the wire from the HMI (display) [2].
▶ Lift the front cover to remove from the appliance.
▶ Install the appliance so that it hangs vertically.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

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 with DIRECT VENT
(exhaust vent and air intake connected to the outside) it is
permitted to be located in bathrooms, bedrooms and
occupied rooms that are normally kept closed. See chapter
4.6 (page 15). If the unit will be installed indoors and use
indoor combustion air (NON-DIRECT VENT), the place
where you install the heater must have enough ventilation.
The National Fuel Gas Codes do not allow NON-DIRECT
VENT gas fired water heater installations in bathrooms,
bedrooms or any occupied rooms normally kept closed.
See chapter 4.6 (page 15).
4. You must correctly vent your heater. See chapter 4.6 (page
15) 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 / 14" W.C.).
6. Keep the 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 4.8 (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 the responsible party for the installation of
your appliance to inspect the appliance and to replace any
part of the water heater which has been underwater.
10. Failure to install the heater correctly may lead to unsafe
operation.

Appliance details

3.5

Fig. 5

Dimensions and minimum installation clearances

Dimensions

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

4.1

Installation tools

The following specialized tools may be required if converting
from natural gas to LP:
•
•

Pressure manometer
Combustion Gas Analyzer (in case of gas type conversion
and/or combustion noise troubleshooting)

4.2

Introduction

Please follow these instructions. Failure to follow
instructions may result in:
▶ Damage or injury.
▶ Improper operation.
▶ Loss of warranty.

Fig. 6

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.

Side view
RTG-K-199/160N/X1

TOP (A)

12”

FRONT (B)

1”

BACK

0”

SIDES

1”

FLOOR (C)

12”

Table 4

Recommended minimum clearances
For servicing access, a 2ft clearance is
recommended to the front cover.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Common installation practice is to first
determine the path and method of venting,
then design the piping layout.

4.3

Proper location for installing your heater

Carefully select the location of the water heater. For your safety
and for proper heater operation, you must provide combustion
air to the heater and properly vent the exhaust gases.
Follow the guidelines below:
▶ 1. Locate the heater where venting, gas and plumbing
connections are feasible and convenient.
▶ 2. The hot water lines should be kept short and insulated to
save energy. It is recommended to locate the water heater
as close as practical to the most frequently used hot water
fixtures.

Installation instructions

NOTICE: Risk of appliance freezing!
▶ The water in this water heater is cold and
always remains cold except for the times
the burner is on. In the event of a power
outage in conjunction with freezing
temperatures, the heater should be
drained.
See chapter 7.2, page 49 “Winterizing”
for draining instructions.

WARNING:
▶ Flammable materials, gasoline,
pressurized containers, or any other
items or articles that are potential fire
hazards must NOT be placed on or
adjacent to the heater. The appliance
area must be kept free of all combustible
materials, gasoline and other flammable
vapors and liquids.

4.4

NOTICE: Risk of appliance freezing!
▶ In areas where outside temperature is
routinely below 32°F (0 °C) and the
heater is to be installed on the inside of
an exterior wall, provide a minimum 2"
air gap or rigid insulation between the
heater back and the wall.
If the wall is sheathed with plaster or drywall, it is
recommended that two support boards, either 1"x 4" or 1/2"
(minimum) plywood first be attached across a pair of studs,
see fig. 7.
▶ Secure the wall mounting bracket provided with the heater
to a wall surface. The heater must be kept level on the wall
surface, see fig. 8, page 15.
▶ Hang the appliance on the bracket, see fig. 9.

Heater placement and clearances

The water heater design is approved for installation on a
combustible wall (see chapter 4.5) provided the floor covering
below the heater is noncombustible.
For installations in an alcove or closet, maintain the minimum
clearances to combustible and non-combustible materials. See
fig. 6, page 13.

4.5

Hanging appliance on the wall
WARNING: Severe personal injury and
property damage!
Before mounting appliance:
▶ Check that there are no loose or
damaged parts inside the appliance.
▶ Set the heater gas type according to the
gas supplied to the unit.
Fig. 7
Front cover should be removed (see
instructions on page 10) in order to inspect
components visually.

Distance between support boards

[1] Support boards
Vertical studs are typically 16" (406mm) on center.

WARNING:
▶ Do not install this appliance on a
carpeted wall. The heater must be
mounted on a wall using appropriate
anchoring materials.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

4.6

Venting
DANGER:
▶ 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.

Fig. 8

Leveling wall mounting bracket

NOTICE:
▶ Installations resulting in negative
pressure/back draft require sealed
combustion (twin pipe / concentric).
Damage caused from back draft, ie.
freezing, are not covered by 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.
▶ Do not install the water heater in areas
where dust and chemicals like hair
sprays, spray detergents, or chlorine
may accumulate.

Fig. 9

Mounting the heater

Flue temperature:
▶ To prevent the risk of flue material
overheat the appliance's flue
temperature is sensed and is limited. The
flue temperature limit is depending on
inlet water temperature.
▶ Residential models: Maximum flue
temperature is limited to 145 °F.

CAUTION: Personal injury and property
damage.
▶ Appliance must be installed vertically.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions
4.6.1 Vent options
This appliance can be installed as direct vent or Category IV.
The RTG-K-199/160N/X1 is approved with the following
venting options:
Item

Material

Vent or air intake pipe
and fitting

United States

Canada

flexible

M&G / Duravent

concentric

Centrotherm

Thermoplastic vent pipe
must be certified to ULC
S636.

ANSI/ASTM D1785

Air Intake pipe may be of any
material listed (left)

rigid
PVC

schedule 40

PVC-DWV

ANSI/ASTM D2665

CPVC

schedule 40

ANSI/ASTM F441

ABS-DWV

schedule 40

ANSI/ASTM D2661

Pipe cement / primer

PVC
CPVC
ABS

Table 5

ANSI/ASTM D2564
ANSI/ASTM F493
ANSI/ASTM D2235

Approved vent materials

For specific questions concerning vent material,
specifications, usage or installation, please contact the
vent manufacturer directly.
Approved Vent Manufacturers:
•
•
•
•
•
•
•

M&G
Centrotherm
IPEX
Royal Plastics
Eccovent
Charlotte
Z-flex
Do not use cellular foam core pipe for
exhaust.

The vent connection for the appliance is secured with a clamp
on the appliance exhaust adapter. All other vent connections
must be glued, except PP and flex PP. 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.
Maximum vent lengths and equivalent lengths per table 8
apply.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

Equivalent Lengths (Ft.)

Vertical

Diagram

Horizontal

Product description

Manufacturer

Manufacturer part number

4.6.2 Approved vent components and terminations

196050
196051
196052

2" Bird screen
3" Bird screen
4" Bird screen

h h

2", 3", and 4" SCH40 (Solid Core) PVC/CPVC
45° long sweep elbow

h h

2", 3", and 4" SCH40 (Solid Core) PVC/CPVC
45° short sweep elbow

h h

2", 3", and 4" SCH40 (Solid Core) PVC/CPVC
90 ° short/long/extra long, sweep elbow 1)

h h

2", 3", and 4" SCH 40 (Solid Core) PVC/CPVC
"T" terminal w/vent screen

h h

2", 3" and 4" SCH40 (Solid Core) PVC/CPVC
straight pipe

h h

IPEX

196005

PVC Concentric termination (2" by 16" long)

h h Exhaust: 1.5
Intake: 20

IPEX

196105

PVC Concentric termination (2" by 28" long)

h h Exhaust: 2.5
Intake: 20

IPEX

196125

PVC Concentric Termination Kit (2" by 40" long)

IPEX

196006 / 197009

PVC / CPVC Concentric Termination Kit (3" by 20"
long)

h h Exhaust: 1.5
Intake: 40

IPEX

196106 / 197107

PVC / CPVC Concentric Termination Kit (3" by 32"
long)

h h

Exhaust: 2
Intake: 40

IPEX

196116 / 197117

PVC / CPVC Concentric Termination Kit (3" by 34"
long)

h h

Exhaust: 2
Intake: 40

IPEX

196021 / 197021

PVC / CPVC Concentric Termination Kit (4" by 36"
long)

h h

Exhaust: 2
Intake: 60

Bosch

Table 6

h h

Exhaust: 3
Intake: 20

Approved PVC/CPVC Vent Components & Terminations

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Equivalent Lengths (Ft.)

Vertical

Diagram

Horizontal

Product description

Manufacturer

Manufacturer part number

Installation instructions

IPEX

196984
196985
196986

2" PVC Low profile termination kit
3" PVC Low profile termination kit
4" PVC Low profile termination kit

Exhaust: 0
Intake: 5

IPEX

081216
081219

2" PVC Wall Termination Kit
3" PVC Wall Termination Kit

Exhaust: 15
Intake: 7.5

Temple
industries

ECAP 321

2" PVC termination E-Cap
3" PVC termination E-Cap

Royal
Plumbing
Solutions

52CVKGVS6502

2" GVS-65 Concentric Vent Termination Kit

h h

Exhaust: 2
Intake: 20

Royal
Plumbing
Solutions

52CVKGVS6503

3" GVS-65 Concentric Vent Termination Kit

h h

Exhaust: 2
Intake: 40

Royal
Plumbing
Solutions

52SWVKGVS6502 (2")

Exhaust: 0
Intake: 5

Table 6

GVS-65
Side Wall Vent Termination Kit

2
4

Approved PVC/CPVC Vent Components & Terminations

810009685
Duravent
810009713
M&G
810009745

2" PP Twin pipe termination
3" PP Twin pipe termination
4" PP Twin pipe termination

Duravent 810009684
M&G
810009712

2" PP Single Horizontal Termination
3" PP Single Horizontal Termination

Duravent 810009682
M&G
810009710

(2" x 4") PP Horizontal Termination Kit - Concentric
(3" x 5") PP Horizontal Termination Kit - Concentric

Table 7

Equivalent Lengths (Ft.)

Vertical

Horizontal

Diagram

Product description

Manufacturer part number

Manufacturer

1) Close sweep fittings are not accepted.

Exhaust: 2
Intake: 2

6
Exhaust: 20
Intake: 40

Approved PP Vent Components & Terminations

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

810009692
810009720
Duravent
810009693
M&G
810009721
Centrotherm

ISLPT0202
ISLPT0303

(2" x 4") Black PP Vertical Termination Kit - Concentric
(3" x 5") Black PP Vertical Termination Kit - Concentric
(2" x 4") Terra-Cotta PP Vertical Termination Kit - Concentric
(3" x 5") Terra-Cotta PP Vertical Termination Kit - Concentric
2" Low profile Wall Termination
3" Low profile Wall Termination

Exhaust: 20
Intake: 40

Exhaust: 0

Intake: 5

Centrotherm

ICRT2439

2" x 4" Concentric Roof Termination

Centrotherm

ICRT3539

3" x 5" Concentric Roof Termination

Centrotherm

ICWT242

2" x 4" Concentric Wall Termination

Exhaust: 5
Intake: 5

Exhaust: 10
Intake: 10

Exhaust: 4

Intake: 4

Centrotherm

ICWT352

3" x 5" Concentric Wall Termination

Ecco
Manufacturing

190288

2" PP Concentric Terminations Horizontal (Wall) Terminations

Ecco
Manufacturing

190388

3" PP Concentric Terminations Horizontal (Wall) Terminations

Ecco
Manufact
uring

190295

2" PP Vertical (Roof) Terminations

Ecco
Manufact
uring

190395

3" PP Vertical (Roof) Terminations

Table 7

Equivalent Lengths (Ft.)

Vertical

Horizontal

Diagram

Product description

Manufacturer part number

Manufacturer

Installation instructions

Exhaust: 6
Intake: 6
Exhaust: 4
Intake: 4

Exhaust: 6
Intake: 6

Exhaust: 4
Intake: 4

Exhaust: 8
Intake: 8

Approved PP Vent Components & Terminations

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions
4.6.3 Vent specifications
Establish vent clearances that comply with the vent
manufacturer's specifications and all applicable national/local
codes.
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 1 ft
or one 90° elbow or an air intake grill cap to prevent debris from
falling into the appliance.
Maximum combustion air and exhaust pipe length
Table 8 displays the maximum allowable straight pipe lengths
for combustion air and exhaust piping. Reduce the maximum
allowable pipe length by the equivalent lengths for each elbow
used and termination used.

Improper gas pressure or vent length may
result in undesired symptoms or errors
such as noisy burner, C1, C2, CF.
The vent for this appliance shall not terminate:
1. over public walkways; or
2. near soffit vents or crawl space vents or other areas where
condensate or vapor could create a nuisance or hazard or
cause papery damage; or
3. where condensate vapor could cause damage or could be
detrimental to the operation of regulators, relief valves, or
other equipment.

PROPER GAS PRESSURE!
The following section assumes the water
heater will receive gas pressure greater than
or equal to 5" WC for the 199kBTU models
(4" WC for 160kBTU models). In cases of gas
pressure below 5" WC for the 199kBTU (4"
WC for the 160kBTU models) the maximum
heat input is reduced.

The values of maximum flue length in
table 8 are before any deductions for
elbows or terminations.

Venting

Max equivalent
Exhaust length

Max equivalent
Intake length

2" Twin pipe

60ft1)

60ft

3" Twin pipe

280ft1)

280ft

2"/ 4"
Concentric pipe

60ft1)

3"/ 5"
Concentric pipe

280ft1)

Table 8

Maximum Allowable Exhaust and Combustion Air
Lengths

1) To assure maximum heat input at maximum vent length
minimum gas pressure should be 5" W.C. for the 199 kBTU
models and 4" W.C. for the 160 kBTU models.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions
Required direct vent terminal clearances (twin pipe / concentric penetration)

Fig. 10
Canadian installations1) U.S. installations2)
with direct vent
with direct vent
terminals
terminals
A Clearance above grade, veranda, porch, deck or balcony

12 in. (30cm)

B Clearance to window or door that may be opened

36 in. (91cm)

12 in. (30cm) below
or to side of opening;
12 in. (30cm) above
opening.

C Clearance to permanently closed window

D Vertical clearance to ventilated soffit located above the terminal within a
horizontal distance of 2 ft (61cm) from the center line of the terminal.

Clearance to unventilated soffit

Clearance to outside corner

G Clearance to inside corner

H Clearance to each side of center line extended above meter/regulator
assembly

*
36 in. (91cm) within a
height 15 ft (4.6m) above
the meter/ regulator
assembly

Clearance to service regulator vent outlet

36 in. (91cm)

Clearance to nonmechanical air supply inlet to building or the combustion 36 in. (91cm)
air inlet to any other appliance.

K Clearance to a mechanical air supply inlet

6 feet (1.83m)

*
12 in. (30cm)
36 in. (91cm) above
if within 10 ft (3m)
horizontally

Table 9

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

Canadian installations1) U.S. installations2)
with direct vent
with direct vent
terminals
terminals
L

Clearance above paved sidewalk or paved driveway located on public
property

M Clearance under veranda, porch deck or balcony

7 ft (2.13m)3)

12 in. (30cm) 4)

Table 9
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.
[*]

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 Clause 5.20, Draft hoods, or;
b) a reference to the following footnote:
“Clearance in accordance with local installation codes and the requirements of the gas supplier.”

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions
Required other than direct vent terminal clearances (single pipe penetration)

Fig. 11
Canadian installations1)
with non direct vent
terminals

U.S. installations2) with non
direct vent terminals

A Clearance above grade, veranda, porch, deck or balcony.

12 in. (30cm)

B Clearance to window or door that may be opened.

36 in. (91cm)

48 in. (1.2 m) below or to side
of opening; 12 in. (30cm)
above opening)

C Clearance to permanently closed window

*
D Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 2 feet (61cm) from the
center line of the terminal

E Clearance to unventilated soffit

F Clearance to outside corner

G Clearance to inside corner

H Clearance to each side of center line extended above meter/
regulator assembly

36 in. (91cm) within a height *
15 ft (4.6m) above the
meter/ regulator assembly

36 in. (91cm)

J Clearance to nonmechanical air supply inlet to building or the
combustion air inlet to any other appliance

36 in. (91cm)

48 in. (1.2m) below or to side
of opening; 1 ft (300mm)
above opening

K Clearance to mechanical air supply inlet

6 ft (1.83 m)

36 in. (91cm) above if within
10 ft (3m) horizontally

Clearance to service regulator vent outlet

Table 10

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

Canadian installations1)
with non direct vent
terminals

U.S. installations2) with non
direct vent terminals

L Clearance above paved sidewalk or paved driveway located on 7 ft (2.13m) 3)
public property

12 in (30cm) 4)

M Clearance under veranda, porch deck or balcony
Table 10

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.
[*]

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions
4.6.4 Vent configuration examples for PVC systems
Below are approved examples of vertical and horizontal venting
installations.
NOTICE: Using a single pipe vent in cold
climates puts the water heater at risk of
freezing, as negative air pressure is common
in buildings during cold weather. This
situation will pull cold air through the heat
exchanger and can lead to damage and a
water leak and is not covered by the
product's warranty. In the event of negative
air pressure causing back drafting contact
Bradford White for information.

Fig. 13

Vertical venting system

[1] Exhaust
[2] Intake
[A] 12 inches (305 mm) (18 in. for Canada) above maximum
snow level or at least 24 inches (610 mm), whichever is
greater.
[B] 12 inches (305 mm)
[C] 12 inches (305 mm) minimum above air intake opening

Fig. 12
[1]
[2]
[3]
[4]
[5]
[LA]

Horizontal venting system (concentric vent)

Exhaust
Air intake
Concentric Vent Kit
Exhaust pipe
Intake pipe
Minimum 1"

A
6720817984-45.1V

Fig. 14

Horizontal parallel venting system (twin pipe)

[A] 3ft minimum
Vent terminals are at the same height.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

Fig. 16
Fig. 15

Horizontal venting installation (combustion air
piping not shown)

Horizontal venting system (sealed combustion)

[1] Intake
[2] Exhaust

[1]
[2]
[3]
[4]

Termination
Water heater
Elbow
Horizontal run should slope ¼ " per foot upwards to water
heater
[LA] 12 inches (305 mm) (18 in. for Canada) above maximum
snow level or at least 24 inches (610 mm), whichever is
greater.
NOTICE:
▶ Place pipe supports every 5 feet
(1525mm) of horizontal and vertical
run, beginning with support near water
heater.
▶ Periodic cleaning of the vent terminal
and air-intake screens is mandatory.
▶ Avoid locating vent terminals near
equipment, vegetation, plants or
building features which can be subject to
degradation from exhaust gases.

Fig. 17

Vent and combustion air pipe position of a sealed
combustion system

[1] Intake
[2] Exhaust
[X] At least 1foot (305mm)

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

With Flex Pipe the maximum length is
reduced by 60%, (applies only to the section
in flex PP). Example: 10 feet of flex PP is
equivalent to 25 feet of rigid PP.
Only use Flex Pipe in the vertical portion of
the installation according to the suppliers
instructions.
4.6.5 Connecting the condensate water drain
NOTICE: Risk of condensate pipe freezing!
▶ Do not install condensate drain tubing in
areas where it may freeze.

Fig. 18

Horizontal venting system (sealed combustion)

[1] Intake
[2] Exhaust
[3] Termination

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.
To install the condensate drain, connect a ¾ " NPT adapter on
the water heater.

Fig. 20

Appliance drain installation

[1] Drain connection
[2] Breather
Installing an additional breather downstream is not necessary
since this function is already included in the heater.

Fig. 19

Vertical venting system with flex PP (sealed
combustion)

[1] Intake
[2] Exhaust

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

CAUTION:
A blocked breather may cause an undesired
double-siphon effect.
▶ Ensure that the breather included in the
siphon is not obstructed to allow correct
function.

Installation instructions

Verify condensate disposal/neutralization is
in accordance with federal, State, and local
regulation.

▶ To allow accessibility, the damper must not be installed in
an enclosed section of vent pipe.
▶ Do not install the damper in unconditioned spaces (e.g.
attics) Condensation can build up while the heater is
running which can later freeze and potentially block the
flapper.

This is a high efficiency appliance,
condensate flow can be as much as
2.1 gal/hr at full power.
4.6.6 Backdraft reducer
The backdraft reducer (9301BFP) is the preferred option for
limiting backdraft (see fig. 21).
6720608643-19.1V

The backdraft reducer (9301BFP) is sized
for 3" diameter PVC.

Fig. 22

Blackflow reducer (9301BFP) installed

Fig. 23

Installation Recommendation for Placement of
Backdraft reducer

It is possible to use Backdraft reducer
(9301BFP) for 2" installations.
This requires 2" to 3" adapters.

6720608643-18.1V

Fig. 21

Part # 9301BFP

Installation
For this solution to be effective, the internal flapper must be
100% closed when the water heater is not running.
Refer to fig. 23 for preferred installation positions in the vent
system.
Installation considerations:
▶ Install the damper per the supplied manufacturer‘s
instructions.
The damper is only to be used in the exhaust vent piping.
▶ Ensure directional arrow on damper label faces in the same
direction as exhaust flow.
▶ If installed horizontally, the axis must be horizontal or
slightly pitched up towards termination to ensure damper
closes 100% when heater is not running.
28

[1] Good
[2] Better
[3] Best
4.6.7 Single Pipe Venting
NOTICE:
▶ Single pipe venting not recommended in
cold climates.
▶ Installations resulting in negative
pressure/back draft require sealed
combustion (twin pipe / concentric).
▶ Damage caused from back draft, ie.
freezing, is not covered by warranty.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

NOTICE:
▶ When installed in an environment where
corrosive chemicals or dirty air (e.g. hair
salons, car washes) are present the
sealed combustion (twin pipe or
concentric) is required.

metal louvers (as metal will reduce the free air by 30%). Refer
to the National Fuel Gas Code for complete information.

4.7

Factory regulation

The appliances are supplied having been set in the factory for
the values shown on the rating plate for natural gas.
For any other adjustments see chapter 7.
4.7.1 Natural gas

Although it is permissible to draw the air-intake from the inside,
it is not the manufacturer’s recommended installation method.
Install a 90° elbow or air intake screen on the top of the airintake inlet adaptor to prevent foreign objects from falling into
the unit.
If a single pipe installation is utilized, follow guidelines below
for providing adequate combustion air for the water heater as
well as any other appliances that may consume air in the same
space. Always follow local codes and regulations of the
authority having jurisdiction.
•

•

Appliances located in unconfined spaces:
– a) An unconfined space is one whose volume is greater
than 50 cubic feet (1.42 cubic meter) per 1000 BTU/
hr (292.81 Watts) of the combined rating of all
appliances installed in the space. That would be 9950
cubic feet (281.8 cubic meters) or 1243 square feet
with 8 foot ceiling for a single 199 kBTU water heater.
– b) In unconfined spaces in buildings of conventional
frame, masonry, or metal construction, infiltration air is
normally adequate to provide air for combustion.
Appliances located in confined spaces:
The confined space must be provided with two permanent
openings, one commencing within 12 inches (304.8mm)
of the top and one commencing within 12 inches
(304.8mm) of the bottom of the enclosure. Each opening
must have a minimum free area of one square inch per:
– 1000 BTU/hr (292.81 Watts) if all air is taken from
inside the building
– 2000 BTU/hr (585.62 Watts) if all air is taken from the
outside by horizontal ducts
– 4000 BTU/hr (1171.24 Watts)if all air is taken from
the outside by direct openings or vertical ducts

The appliances must not be operated if the
dynamic gas pressure is less than 3.5” WC1)
or greater than 10.5” WC.
1) To assure maximum heat input at maximum vent length
minimum gas pressure should be 5" W.C. for the 199 kBTU
models and 4" W.C. for the 160 kBTU models. For more
information see section 4.6.3.
4.7.2 Liquid propane gas (after gas conversion)
The appliances must not be operated if the
dynamic gas pressure is less than 8”WC or
greater than 13” WC.
If gas conversion is needed (Natural Gas to Liquid propane
Gas), see section 6.7.1.
DANGER:
▶ The gas type conversion must only be
carried out by a qualified contractor.

Or the confined space must be provided with one permanent
opening or duct that is within 12 inches (304.8mm) of the
ceiling of the enclosure. This opening must have a minimum
free area of one square inch per:
– 3000 BTU/hr (878.43 Watts) if all air is taken from the
outside by a direct opening or vertical duct.
Louvers, grills and screens have a blocking effect; when used,
increase the sizes of your openings by 300% for wood louvers
(as wood type will reduce the free air by 75%) and 43% for

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

4.8

Gas piping & connections

Before connecting the gas supply, check the rating plate on the
right side of the heater to be sure that the heater is rated for the
same gas to which it will be connected.
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 to CGA B149
INSTALLATION CODES and/or local installation codes.
DANGER: Explosion hazard!
▶ DO NOT connect to an unregulated or
high pressure propane line or to a high
pressure commercial natural gas line.
Fig. 25
DANGER: Explosion hazard!
▶ The heater must be isolated from the
gas supply piping system during any
pressure testing of that system at test
pressures equal to or more than 0.5 psig
(14 W.C.). If overpressure has
occurred, such as through improper
testing of the gas lines or malfunction of
the supply system, the gas valve must
be checked for safe operation.
GAS CONNECTIONS
▶ Install a manual gas shut off valve on the gas supply line
within easy reach of the appliance.
▶ Install a union when connecting gas supply.
▶ Gas connection to the water heater is ¾ " NPT. See chapter
4.8.1 for the minimum internal pipe diameter required.
▶ Undersized flexible appliance connector not permitted.
▶ National Fuel Gas Code requires that a sediment trap (drip
leg) be installed on gas appliances not so equipped. The
drip leg must be accessible and not subject to freezing
conditions. Install in accordance with the
recommendations of the serving gas supplier, see fig. 25.
▶ Tighten gas pipe with the support of a wrench, see fig. 24.

[1]
[2]
[3]
[LA]

Gas connection

Shut off valve
Gas supply
Cap
Minimum 3" sediment trap, (drip leg)

Once connections are made, check for gas leaks at all joints.
Apply some gas leak detection solution to all gas fittings.
Bubbles are a sign of a leak. A combustible gas detector may
also be used to detect for leaks.
DANGER: Explosion hazard!
▶ If you detect a leak, shut off the gas.
Tighten appropriate fittings to stop leak.
Turn the gas on and check again with a
gas leak detection solution. Never test
for gas leaks using a match or flame.
GAS LINE SIZING
The gas supply piping for a single heater should be sized for a
maximum draw of 199000 BTU/hr for the RTG-K-199N/X1.
Measure the length of the gas supply line from the building's gas
main to the heater and use chapter 4.8.1 and 4.8.2, page 31 or
the gas line manufacturer’s sizing tables to determine the pipe
diameter necessary. If there are more gas appliances on the
line, size the gas line according to the total maximum amount of
BTU draw input rating for all appliances combined.
Note: Undersizing the gas line may result in diminished hot
water flow rate and temperature, or improper appliance
operation (noise and combustion instabilities). See chapter
4.15, page 39 for the procedure to measure gas pressure.
Proper gas pressure must be confirmed at time of installation.

Fig. 24
30

Tighten gas pipe to the heater
RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions
4.8.1 Gas Line Sizing Tables for NATURAL GAS
For your convenience see below for an excerpt from gas line sizing tables for a single NG appliance. For details see the current NFPA
54.
Required input for 160000 / 199000 BTU/hr for the RTG-K-160/199N/X1. The gas supply system must be sized for the combined
total maximum BTU/hr load requirements of all gas appliances running simultaneously.
The tables below show the maximum capacity of the gas supply pipe in cubic feet per hour. Please contact your local gas supplier
for the energy content of the gas to determine the BTU/hr capacity. Use 1,000 BTU/cubic foot for rough estimations.
Maximum pipe capacity in cubic feet of Natural Gas per hour for gas pressures of <2.0 psig (55" WC or 138 mbar) and a pressure
drop of 3.0” W.C. (7.5 mbar) based on 0.60 specific gravity gas.
Initial Supply Pressure of 8.0" w.c. or Greater
Nominal
Internal
Iron Pipe
Diameter
Size, inches inches
½
¾
1

0.622
0.824
1.049

Length of Black Iron Pipe (Schedule 40 Metallic Pipe), Feet
10

100

454
949
1787

312
652
1228

250
524
986

214
448
844

190
397
748

172
360
678

158
331
624

147
308
580

138
289
544

131
273
514

Table 11
Maximum pipe capacity in cubic feet of Natural Gas per hour for gas pressures of <2.0 psig (55" WC or 138 mbar) and a pressure
drop of 3.0" W.C. (7.5 mbar) based on 0.60 specific gravity gas).
Initial Supply Pressure of 8.0" w.c. or Greater
Length of Corrugated Stainless Steel Tubing (CSST), Feet
EHD*
30
31
37

100

828
958
1,530

580
672
1,090

471
546
895

407
471
778

363
421
698

330
383
639

305
355
593

285
331
555

268
311
524

251
295
498

Table 12
* EHD = Equivalent Hydraulic Diameter. The greater the value of
EHD, the greater the gas capacity of the tubing.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions
4.8.2 Gas Line Sizing Tables for LP GAS
For your convenience see below for an excerpt from gas line sizing tables for a single LP appliance. Their intended use is for pipe
sizing between the 2nd stage (low pressure) regulator and the appliance. For details see the current NFPA 54 or NFPA 58.
Required input for 160000 / 199000 BTU/hr for the RTG-K-160/199N/X1. The gas supply system must be sized for the combined
total maximum BTU/hr load requirements of all gas appliances running simultaneously.
The tables below show the maximum capacity of the gas supply pipe in thousands of BTU per hour of Undiluted LP Gas at 11" W.C
(0.4 psig or 27.4 mbar) based on a pressure drop of 0.5" W.C (1.25 mbar).
Pipe Sizing Between Single- or Second-Stage (Low-Pressure) Regulator and Appliance
Length of Pipe, Feet

Nominal
Internal
Iron
Diameter
Pipe inches inches

100

1/2

0.622

291

200

160

137

122

110

101

3/4

0.824

608

418

336

287

255

231

212

197

1.049

1150

787

632

541

480

434

400

372

Table 13
CSST Sizing Between Single- or Second-Stage (Low-Pressure) Regulator and Appliance Shutoff Valve
Length of Pipe, Feet
EHD*

100

254

183

151

131

118

107

303

216

177

153

137

126

117

109

102

521

365

297

256

227

207

191

178

169

159

605

425

344

297

265

241

222

208

197

186

Table 14
* EHD = Equivalent Hydraulic Diameter. The greater the value of
EHD, the greater the gas capacity of the tubing.

Tube Sizing Between Single- or Second-Stage (Low-Pressure) Regulator and Appliance
Nominal
Iron
Pipe
inches
5/8
3/4

Length of Pipe, Feet

Internal
Diameter
inches

0.527

188

129

104

0.652

329

226

182

155

138

Table 15
Maximum Capacity of Semi-Rigid (flexible, non corrugated) Tubing in Thousands of BTU/hr of Undiluted Liquefied Petroleum Gases
(at 11 inches Water Column Inlet Pressure).(Based on a Pressure Drop of 0.5 Inch Water Column)* Source National Fuel Gas Code
NFPA 54, ANSI Z223.1 - No Additional Allowance is necessary for an ordinary number of fittings.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

4.9

Water quality

Water quality can have an impact on appliance longevity. Water
supplied to the Infiniti Tankless™ K-Series must be in
accordance with table 16 and fig. 26.
For water analysis data call your local water department, or if
on a well, have well water analyzed periodically. Heavy scale
will form if the combination of water total hardness and pH
exceeds the values specified in fig. 26 (grey area), Bradford
White recommends consulting a local water treatment
professional for water softening/conditioning options.
Description
pH
TDS (total Dissolved Solids)
Total hardness
Aluminum
Chlorides
Copper
Iron
Manganese
Zinc

Max. Levels
pH
6.5 - 8.5
mg/l or ppm
690
mg/l or ppm
200
mg/l or ppm
2.0
mg/l or ppm
250
mg/l or ppm
1.0
mg/l or ppm
0.3
mg/l or ppm
0.05
mg/l or ppm
5.0

1. Total Hardness and pH maximum values must be evaluated
in combination. Indicated maximum values will be reduced
according to fig. 26.
2. Combined values of total hardness and pH must be under
the indicated grey area. (e.g. the pair [180;8.3] [total
hardness; pH] is not acceptable).
Connecting the pressure relief valve (PRV)
A pressure relief valve is included in the box and must be
installed at the time of installation. No valve is to be placed
between the PRV and the heater. No reducing coupling or other
restriction may be installed in the discharge line. The discharge
line must be a minimum of 4” above a drain and installed such
that it allows complete drainage of both the PRV and the line.
The discharge line must be placed where it will not cause any
damage.
▶ Use the integrated port to install the PRV, see Fig. 27 [1].
▶ Tighten the PRV with the support of a wrench, see Fig. 27.
▶ Support all piping.

Table 16

Fig. 27

Plumbing Connections (with shutoff valves) and
Pressure Relief Valve

4.10 Water connections
Water connections are on top ONLY.
Bottom connections are drain/service ports
with limited flow capacity.

Fig. 26

Water total hardness and pH values

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

NOTICE:
▶ This heater is not approved for
preheated water applications exceeding
140 °F (60 °C) for Residential
appliances; in these cases a 3-way valve
or mixing valve must be installed before
the appliance to prevent water
exceeding 140 °F (60 °C) from entering
the appliance.

Installation instructions
▶ When facing the heater, the ¾ ” cold connection is on the
top right and the hot connection is on the top left.
▶ Tighten all water connections with the support of a wrench,
see 29.

Fig. 28
[1] Cold connection
[2] Hot connection

WARNING: Appliance damage!
Appliance will overheat if not filled with water
▶ Ensure that the appliance is filled with
water by opening a hot water tap, before
plugging in the water heater to the power
supply.
▶ The use of unions when connecting to the inlet and outlet
connections is recommended. This will facilitate any
necessary servicing.
▶ Plastic or PEX type plumbing materials are not suitable for
connecting directly to or within 18" of the water heater.
▶ Although water piping throughout the building may not be
copper, we require that copper or suitably rated stainless
steel flex line be used for the water connections for 18" on
either side of the water heater (follow local codes if more
stringent).
▶ Never sweat any piping directly to water connections, as
damage will occur.
▶ Keep water inlet and outlet pipes to no less than ¾"
diameter to allow the full flow capacity.
▶ If the cold and hot connections to the heater are reversed,
the heater will not function.
▶ Be certain there are no loose particles or dirt in the piping.
Blow out or flush the lines before connecting to the water
heater.
▶ Full port shutoff valves should be installed on both the cold
water supply and hot water outlet lines to facilitate
servicing the heater (see fig. 27).
▶ For installation on a private well system with a pressure
tank, the lowest pressure range setting recommended is
30-45 psi (2.06 - 3.1bar).

4.11 Domestic hot water recirculation with
external pump
The following drawing is provided to outline one possible
recirculation design. This schematic is for illustration only and
must not be used for actual installation without appropriate
engineering and technical advice from a properly licensed
professional in the locality where the installation is made.

Fig. 29

Water filter

[1] Cap
[2] Water filter

This appliance has been designed to permit recirculation by
controlling an external pump. For this function, the external
pump must be electrically connected to the appliance - Cable
accessory (7736504585) is available. All the features of
recirculation ( 6.5.3 A1 Recirculation) can be used.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

Set point

Adjustable within hidden RS menu (2-18F)

1
Pump OFF

10F
Pump ON
Water temp in loop (inlet water NTC)

6720817984-46.1V

Fig. 31

4
Fig. 30
[1]
[2]
[3]
[4]
[5]
[6]
[7]

6720816948-24.1V

Recirculation application

Cold water supply
Check valve
Circulator pump
Expansion tank
Shutoff valves
PRV
RTG-K-160/199N/X1

4.12 Adjusting the recirculation settings
The pump and burner turn ON and OFF based on a delta
between the set point temperature on the water heater and the
inlet water temperature sensor value. This delta is called the
comfort level.
The higher the comfort level, the smaller the delta between the
set point temperature on the water heater and the inlet water
temperature sensor value, resulting in a hotter recirculation
system.

Pump activation and deactivation thresholds
Comfort level

Delta T ( °F)

Table 17 RS Menu
The comfort level can be adjusted to achieve the desired
balance between readiness of hot water at the point of use and
energy consumption.
A higher comfort level will result in longer
pump run times, which will consume more
electricity and gas.

The smaller the comfort level, the larger the delta between the
set point temperature on the water heater and the inlet water
temperature sensor value, resulting in a cooler recirculation
system.
Below is a graph illustrating how the comfort level value
changes the recirculation system’s temperature.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

4.13 Recirculation with the RTG-K-160/199N/X1
Recirculation with the RTG-K-160/199 models requires the
installation of an external pump.
The RTG-K-160/199 models have the capability of controlling
an external pump by switching power ON and OFF to the
external pump using the recirculation pump cable.
Use only bronze or stainless steel pumps. Do
not use pumps of iron construction as they
will oxidize and pose health risks.
Refer to pump manufacturers pressure vs flow specifications to
select a pump that will provide adequate flow through the
recirculation system.

1
6

5
4

3
N
G
L
6720817984-47.1V

Fig. 32
[1]
[2]
[3]
[4]
[5]
[6]

Cable to control board
Appliance front cover
External recirculation pump (field supplied)
Terminal block
Recirculation pump cable
5 amp fuse

The flow rate through the recirculation system must be larger
than the activation fl ow rate of the water heater, 0.4 GPM.
A flow rate through the recirculation system greater than 1GPM
is recommended.

4.14 Space heating applications
CAUTION:
▶ If the set point temperature is above
120°F, precautions should be taken to
protect users of potable water from
scalding.

CAUTION:
▶ The use of a flow switch is
recommended to ensure DHW priority
and to prevent “cold-blow” situations
when the Bradford White tankless water
heater is used with an air handler.
Air handler installation must include a
pump.
The flow switch should be used to
disable the blower on the air-handling
system when domestic water is used.

CAUTION:
▶ Ensure the primary pump is properly
sized to provide adequate flow for the
system heat load.

For Pump sizing please refer to the pressure
drop curves, fig. 34. Also remember to
account for system piping pressure loss. A
minimum of 1.7 GPM is recommended to
provide adequate flow through the water
heater when determining the size of the
primary pump.
Bradford White tankless water heaters are approved for
use in combination DHW and space heating applications
(open-loop setup).
These water heaters are not approved for use in space heating
only applications (closed-loop setup). Figure 33 gives an
example of a combination DHW and space heating application
that is allowable. Use of tankless water heater in a combination
DHW and space heating application will result in the product
warranty being reduced to 3 years.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Installation instructions

10
6

7
16

relay

5
Fig. 33
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]

6720817984-48.1V

Hydro air system with water heater

Hot water outlet
Cold water inlet
Pressure relief valve
Gas supply
Shut off gas valve (field supplied)
Thermal expansion tank (as required)
Air purge (field supplied)
Cold water supply
Check valve (field supplied)
Thermostatic mixing valve (field supplied)

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

[11]
[12]
[13]
[14]
[15]
[16]
[17]

Thermometer (field supplied)
DHW outlet
Thermostat (field supplied)
Air handler
Check valve (field supplied)
Shutoff valve (field supplied)
Circulation pump (only required if air handler doesn’t
includes internal pump) (field supplied)
[18] Relay (only required if air handler doesn’t includes
internal pump) (field supplied)

Installation instructions

Fig. 34

Pressure drop curve

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Electrical connections

4.15 Measuring gas pressure
4.15.1 Gas supply pressure
Confirm gas pressure upon installation.
6720817984-49.1V

Connecting manometer
▶ Shut off gas supply at installer supplied shutoff valve for
this water heater.
▶ Locate the inlet gas pressure test port (see Fig. 35).
▶ Loosen the screw inside test port fitting (do not remove)
and connect the manometer tube to the test port (see
Fig. 35).
Static Pressure Test
▶ Turn the gas supply back on.
▶ Record the static gas pressure reading in table 19.
Dynamic Pressure Test
▶ Turn ON the appliance.
▶ Access menu P1 Max. Power, see section 6.5.
Note: While in this mode the appliance will run constantly at
maximum power and allow maximum water flow.
For inlet gas pressure adjustment consider the following table:

Gas type
Inlet gas Pressure

LPG

3.5” WC1)

8” WC

1
Fig. 35

Gas pressure test port

[1] Gas pressure measuring port
Gas pressure

Date

Static Gas Pressure Reading
Dynamic Gas Pressure
Reading
Table 19 Inlet gas pressure readings

Electrical connections

5.1

Electrical power supply
WARNING:
▶ For safety reasons, disconnect the
power supply cord to the water heater
before any service or testing is
performed.

Table 18 Minimum inlet gas pressure under full operation
1) To assure maximum heat input at maximum vent length, the
minimum gas pressure should be 5" W.C. for the 199 kBTU
models and 4" W.C. for the 160 kBTU models. For more
information see section 4.6.3.
▶ Operate all other gas appliances (except heater) on the
same gas piping system at maximum output.
▶ Open all hot water taps to achieve a flow rate of at least 6
gallons per minute. (1 tub and 2 sinks should be sufficient).
If heater goes back to P2, open more hot water fixtures to
allow sufficient flow to keep the water heater in P1.
▶ Record the lowest operating gas pressure reading in
table 19.
▶ Turn OFF the appliance.
▶ Shut off gas supply.
▶ Disconnect the manometer tube from the test point.
▶ Tighten the screw inside test point fitting.
Depending on the vent length, gas pressures below 5" W.C. for
Natural Gas or 8" W.C. for LPG may result in reduced power
output or possible error codes and must be corrected. See Gas
Connections, chapter 4.8, page 30.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

WARNING:
▶ This water heater must be electrically
grounded in accordance with the most
recent edition of the National Electrical
Code. NFPA 70. In Canada, all electrical
wiring to the heater must be in
accordance with local codes and the
Canadian Electrical Code, CSA C22.1
Part 1. Do not rely on the gas or water
piping to ground the metal parts of the
heater.

WARNING:
▶ Modification of or tampering with the
power supply cord is prohibited.
▶ Use of extension cords is prohibited.
The water heater requires an electrical power supply from a
120VAC / 60Hz properly rated receptacle and must be
properly grounded.
The water heater is wired as shown in the wiring diagram
39

Operation instructions
(chapter 10, Fig. 61).

▶ Check the fuse on the printed circuit board for electrical
continuity, see fig. 38, [1].

Fig. 36

Fig. 38

Connecting power supply cord

Fuse position

[1] Power cord length: 5.9ft (1.8m).

[1] Fuse

Note: The power supply that the appliance is plugged into
should be isolated from possible water damage. Observe
proper clearance to avoid damages.

▶ After checking the fuses, reinstall all parts in reverse order.

5.2

Position of the fuses in control unit

Operation instructions

To check fuses, proceed as follows:
▶ Remove the front cover, see fig. 3, page 10.
▶ Disconnect all the cables from the control unit.
▶ Press the four snaps of the control unit and remove the
cover.

Fig. 39
[1]
[2]
[3]
[4]
[5]

Fig. 37

Control Unit

▶ Press the four snaps inside the control unit and remove the
PCB.

On/Off button
Program Key
LCD display
Up button
Down button
NOTICE:
▶ Wipe down with a damp cloth. Do not
use any aggressive or corrosive cleaning
agents to clean the window.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Operation instructions

2
3

7
Fig. 40
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]

6.1

6720817984-51.1V

Description LCD display

Locked condition indicator
Error indicator
Temperature indicator
Activation water flow
Cascading Master indicator
Solar mode indicator
Flame indicator
Power bar indicator

▶ 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.
B. Use only your hand to press the on/off control button. Never
use tools. If the touch control display is dirty, wipe down with a
damp cloth. Forceful repair may result in a fire or explosion.
C. 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.

6.2

Power

To turn ON the appliance;
▶ Press the

button.

For your safety read before operating your
water heater
DANGER: Explosion hazard!
▶ If you do not follow these instructions
exactly, a fire or explosion may result
causing property damage, personal
injury or loss of life.

Fig. 41
To shut down the appliance;
▶ Press the

WARNING: Appliance malfunction!
Strong magnetic fields can interfere with the
electronics, which can lead to appliance
malfunction.
▶ Do not attach magnets to this water
heater, neither install it near strong
magnetic fields.
A. This appliance is equipped with electronic ignition for
lighting the main burner. When turning the heater on, follow
these instructions exactly.

6.3

button.

Error code reset

Some possible faults can be solved by resetting the appliance.
To remove an error code from the display,
▶ Touch and hold
for more than 3sec.
The appliance will initiate the start up sequence.
WARNING: Appliance malfunction!
▶ If the problem persists, contact your
installer.

WHAT TO DO IF YOU SMELL GAS
▶ Turn off the gas shut-off valve.
▶ Open windows and doors.
▶ Do not try to ignite the appliance.
▶ Do not touch any electrical switch, telephone, and do not
use outlets.
RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Operation instructions

6.4

Temperature selection

Saving water resources:

By default, the unit is set for 120 °F (49 °C)
outlet water.

To select a hot water temperature:
▶ Press the buttons
and
temperature is displayed.

until the desired

Fig. 42
To increase setpoint temperature limit of the
appliance:
▶ Access the menu LM - temperature
Limit ( section 6.5.4).
A lower temperature set point will reduce the risk of scalding,
reduce energy consumption and increase the longevity of the
heat exchanger.

Fig. 43
6.4.1 Programming the default setpoint temperature

CAUTION: The temperature shown on the
display is approximate, always check with
your hand before bathing children or elderly.
Setting the water temperature
The desired temperature of the hot water can be adjusted on
the front control panel of the heater.
The water heater has an electronically controlled gas valve that
modulates the burner input in response to both varying hot
water flow rates and/or changes in any incoming and outgoing
water temperatures.

Fig. 44
▶ Press the buttons
and
to select the temperature
to be memorized.
▶ Press the button
for 3 seconds to save the default set
point temperature.
When the display stops blinking, the default set point
temperature is saved in memory.
Selecting the default setpoint temperature
In order to select the default setpoint temperature.
▶ Press the programming button for 1 second.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Operation instructions
Display shows the default setpoint temperature, which is now
the hot water selected setpoint-temperature.

6.5.1 P4 (Information)

6.4.2 Solar Mode
If the appliance does not ignite, it means that the desired set
temperature would be exceeded even running at minimum
BTU. In this condition, the solar mode indicator will show on the
display.
In most cases, solar mode is activated if the inlet water
temperature exceeds the set point temperature minus 1 °F
(0.5 °C).
Fig. 45
Solar mode/warm inlet temperature activation formula
Temp. inlet > [Temp. set - 1 °F (0.5 °C)]

Ex.: 111 °F (43.9 °C) > [112 °F (44.4 °C) - 1 °F (0.5 °C)]

Table 20

6.5

Information /Adjustments menu

▶ Simultaneously press buttons
,
and
for 3
seconds.
Display shows P4 (Information).
▶ Press buttons
or
to scroll through the available
menus.

P4 - Information

This menu provides access to several parameters.
▶ Access to information / adjustments manual.
Display shows P4 (Information).
▶ Press the button
.
Display shows E.
▶ Press buttons
or
to choose the following
information.
– OD (Operation Data)
– FH (Failure History)
▶ Press the button
to select the desired information.

Available menus

OD (Operation Data)
Allows you to view various parameters of the current operation
of the appliance.
▶ Press buttons
or
to choose the following
information:

Display Description

•

Information (section 6.5.1)

Gas Type

Purge (section 6.5.2)

Cascading

Settings (section 6.5.3)

Temperature Limit (section 6.5.4)

Appliance Type

Bypass

Actuator Calibration

ICC

Exit

Minimum Power

Maximum Power

Low Power

Automatic Calibration

Powerbus Address

Table 21

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•
•
•
•
•
•
•
•
•
•
•

0d (Chamber NTC) - current water temperature at heat
exchanger outlet.
1d (Inlet NTC) - current temperature of the temperature
sensor of the water inlet pipe.
2d (Outlet NTC) - current temperature of the temperature
sensor of the water outlet pipe.
3d (Flow) - total flow through main and bypass valves.
4d (barometric pressure) - current barometric pressure
at installation location.
5d (Fan Speed) - current fan speed.
6d (Output Power) - % current power.
7d (SS Hex NTC) - Flue gases temperature sensor at the
condensing unit inlet (between heat exchangers).
8d (Exhaust Gas NTC) - Exhaust flue gases temperature
sensor.
9d (Ambient NTC) - current temperature inside cabinet
near the fan.
10d (External Tank) - current temperature on the external
tank.
11d (Operation Cycles) - number of times burner has
been started.
43

Operation instructions
•
•

12d (Operation Hours) - number of hours burner has
operated.
E - Exit.

6.5.2 P9 (Purge)

How to select desired information:
▶ Press the button
to view the selected parameter.
The information is showed on the display.
▶ Press the button
to return to parameters list.
▶ Press buttons
or
to select E.
▶ Press the button
to exit.
Numbers of cycles
To see how many cycles the appliance has done, please enter
the menu 11d (Operation Cycles).
After checking the sub-modes 0C, 1C, 2C, 3C, 4C, introduce
the values in a table as the example below;
4C

Fig. 46

P9 - Purge

This menu allows you to purge the exhaust circuit.
▶ Access to information / adjustments menu.
Display shows P4 (Information).
▶ Press the button
until the display shows P9 (Purge).
After 2 sec. the fan starts working to purge the exhaust
circuit.
The fan remains running until the Purge menu
is exited, to do so:
▶ Press the button
.

Table 22 Total of cycles
In this example, the numbers of cycles is: 4 061 776.
In the calculation of number of cycles,
1 cycle means 1 ignition.

6.5.3 SA (Settings)

Numbers of hours
To see how many hours the appliance has worked, please enter
the menu 12d (Operation Hours).
After checking the sub-modes 0H, 1H, 2H, 3H, 4H, introduce
the values in a table as the example below;
4H

Table 23 Total of hours
In this example, the numbers of hours is: 1 863.
FH (Failure History)
Allows you to view the last 10 error codes.
▶ Press buttons
or
to choose from 1F (most
recent failure) to 10F (older failure).
▶ Press the button
to view the selected failure.
The error code is shown on the display.
▶ Press the button
to return to failure list.
▶ Press buttons
or
to select E.
▶ Press the button
to exit.

Fig. 47

SA - Settings

This menu provide access to several parameters.
▶ Access to information / adjustments menu.
Display shows P4 (Information).
▶ Press the button
until the display shows SA
(Settings).
▶ Press the button
.
Display shows E.
▶ Press buttons
or
to choose the following
information.
– E Exit
– A1 Recirculation
– A8 Startup Delay
– A9 Units Set
– Ab Region Selection
RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Operation instructions
– rS Recirculation settings
▶ Press the button
to select the desired information.
A1 Recirculation
Choosing a recirculation program:
▶ Press the button
.
▶ Press buttons
or
to scroll through the options.
– OF OFF
– Hr House Recirculation
- Hot water readily available at faucets.
– tI Tank Loading Internal NTC
- Tank loading using the water heater’s inlet water
temperature sensor to control the pump.
– tE Tank Loading External NTC
- Tank loading using the external temperature sensor to
control the pump.
– tA Tank Loading Aquastat
- Tank loading using an external aquastat to control the
pump.
▶ Press the button

to exit recirculation menu.

A8 (Startup Delay)

Fig. 49

A9 - Units

▶ Access to information / adjustments menu.
Display shows SA (Settings).
▶ Press the button
until A9 (Units) is in the display.
▶ Press the button
.
▶ Press the buttons
or
to select measurement units,
– °C - Metric (l/min)
– °F - Imperial (gal/min)
▶ Press the button
for 3 secs. to save the selected units.
The selected unit blink.
▶ Press the button

to exit units menu.

AB (Region Selection)
▶ Press the button
.
Display shows following menu.
– EU (Europe)
– nA (North America)
▶ Press the button
for 3 secs. to save the selected
region.
The selected region blinks.
▶ Press the button
Fig. 48

A8- Startup Delay

This menu allows programing a burner start delay between 0
and 60 seconds, after detecting water flow.
▶ Access to information / adjustments menu.
Display shows SA (Settings).
▶ Use the buttons
or
to choose A8 (Startup
Delay).
▶ Press the button
.
Display shows Startup Value(s).
▶ Press the buttons
or
to define, in seconds, the
delay to start-up after detection of water flow.
▶ Press the button
for 3 seconds to save the desired
value.
▶ Press the button

to exit A8 (Startup Delay) menu.

A9 (Units Set)
This menu allows you to choose the units visible on the display.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

to exit units menu.

RS Recirculation Settings
To define recirculation comfort level,
▶ Press the button
▶ Press buttons
– 1
– 2

.
or

to define comfort level.

– ...
– 9
Choosing a higher comfort level (9) will set the
recirculation water temperature closer to the set point
defined on the water heater. Choosing a lower value (1) will
favor efficiency at the expense of recirculation temperature
comfort.
▶ Press the button
to select value and to exit
Recirculation Settings.

Operation instructions
6.5.4 LM (Temperature Limit)
140 °F is the maximum temperature to be
defined for residential models.

How to select Temperature Limit,
▶ Press the button
.
Display shows temperature limit value.
▶ Press the buttons
or
to select desired temperature
limit or OF (OFF) to unlock the Temperature Limit.
▶ Press the button
for 3 secs. to save your selection.
The selected temperature blinks.
▶ Press the button

to exit Temperature Limit menu.

6.5.5 PE (Appliance Type)
After defining these parameters, it isn’t
possible to modify.

The water valve calibration process takes
several minutes.
▶ Do not interfere with the appliance.
6.6.1 MF (Main water Valve Auto Calibration)
▶ Open one hot water tap.
▶ Access menu PA.
▶ Press the button
.
▶ Press the buttons
or
to select nF.
▶ Press the button
.
The appliance will start the auto calibration of main valve.
Display will show water flow rate value X 10 (multiplied by
10) during the process.
Water flow will shut-off.
▶ Wait until indication of calibration
completed appears on the screen, the
value blinks.
▶ Wait until water flow blinks on the screen
indicating that calibration is complete.

This menu provides access to several parameters:
▶ Press the button
.
▶ Press buttons
or
to scroll through the options.
– TP (Appliance Type - Residential)
– AP (Appliance Power - 199/160 kBTU)
– MO (Appliance Model - IN/OU)1)
– E (Exit)
▶ Press the button
for 3 secs. to save your selection.
▶ Press the button
to exit recirculation menu.
6.5.6 PF (Bypass Activation)
To Enable or Disable bypass function:
▶ Press the button
.
▶ Press buttons
or
to scroll through the options.
▶ Press the button
.
Display shows following menu.
– EN (Enable)
– DI (Disable)
▶ Press the button
to select option.

6.6

Water valves calibration
Water valve calibration must be done when
main water valve or bypass valve is replaced.
Also required when electronic control unit is
replaced.

▶ Press the button

to return.

6.6.2 BP (Bypass Valve Auto Calibration)
▶ Open one hot water tap.
Flow rate between 0.80 GPM and 1.80 GPM is required.
It's possible to confirm this value by entering BP bypass
water valve menu.
▶ Access menu PA.
▶ Press button
.
▶ Press button
or
to select bP (bypass water
valve).
▶ Press button
.
The appliance will start the auto calibration of the bypass
valve.
Display will show water flow rate value X 10 (multiplied by
10) during the process.
The display shows the flow rate.
▶ You should adjust the flow rate at the
beginning of the calibration process.
▶ Wait until water flow blinks on the screen
indicating that calibration is complete.
▶ Press the button

to return to main menu.

1) IN - Indoor / OU - Outdoor

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Operation instructions

6.7

Gas type
Improper gas type will affect appliance
performance.

▶ The 3 restrictor plates should be pre-assembled onto their
tray, but if loose in box, follow installation instruction, as
shown in fig. 51 [1].
▶ Insert the LP conversion plate in the appropriate location
shown in Fig. 51 [2].
CAUTION:
▶ All three flow restrictors and seal must
be assembled according to the Fig. 51
and Fig. 52, to ensure correct appliance
performance.

▶ Press simultaneously buttons
,
and
for 3
seconds.
Display shows P4 (Information).
▶ Press buttons
or
to select P7 (Gas Type).
▶ Press
to enter.
▶ Press buttons
or
to confirm gas type according
to table 24.
▶ Press
for 3 seconds to confirm Gas type.
The selected gas type blinks.
Gas type
Natural Gas
Liquid Propane
Table 24

Display
nA
LP

6.7.1 Gas conversion from NG to LPG
DANGER: Fatal accidents!
Before any service or testing in the
appliance,
▶ Turn off the appliance.
▶ Disconnect the power supply cord.
▶ Shut off the gas supply.
Fig. 51

199kBTU appliance gas conversion kit

The gas type conversion must only be carried
out by a qualified contractor.

▶ Turn Off the appliance.
▶ Remove the front cover from the appliance (section 3.3.2).
▶ Remove the four screws that retain the cover plate to the
gas manifold, see fig. 50 (plate in grey color).

Fig. 50

Gas manifold

▶ Remove metal plate and seal.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Maintenance and service

DANGER:
▶ Replace all dismantled joints and o-rings
with new ones.

NOTICE:
▶ Inspect and clean the complete water
heating system once a year.
▶ Follow points 5 and 6 in Table 25 after
400 operation hours or 25000 cycles
(whichever occurs first), see
chapter 6.5.1 (Op. Data).
▶ Inspect the water heater and
components for wear or fatigue.
Immediately repair all faults to avoid
damage to the system.

Fig. 52
▶
▶
▶
▶

▶
▶
▶
▶
▶
▶

160kBTU appliance gas conversion kit

Tighten the four screws.
Open the gas supply valve.
Turn On the appliance.
Check for gas leak (e.g. use leak detector fluid, like water
and soap, over and around the metal plate) and act
accordingly.
Place the front cover.
Access service mode by pressing and holding down at the
same time,
,
and
for 3 seconds.
Press buttons
or
until the display shows “P7”.
Press
.
Press buttons
or
to choose LP (LPG).
Press the button
for 3 secs. to save your selection.
The selected temperature blinks.

▶ Update “TYPE OF GAS” in the rating plate of the appliance
using the label provided with the gas conversion kit.
▶ Confirm CO2 and CO values and, if necessary, adjust the
parameters P1 and P2, see chapter 8.13 for more
information.

Every year
1. Inspect venting system

2. Inspect combustion chamber

3. Inspect burner

X1)

4. Inspect pressure relief

5. Inspect water filter

6. Heat Exchanger Descaling

7. Inspect condensate siphon

Table 25 Annual maintenance
1) Proceed with burner cleaning if error code CE is displayed.
Check the flue exhaust for blockage (appliance is protected
against flue blockage).
2) Proceed with heat exchanger descaling whenever error
codes AA and E5 are displayed (appliance is protected
against over heating in case of scaling).

WARNING: Gas leakage!
▶ Replace burner seals in case burner is
disassembled. Consult spare part list at
www.bradfordwhite.com.

Maintenance and service
DANGER:
▶ Always shut off the electrical power
supply, shut off the manual gas valve
and shut off the water valves whenever
servicing.

Annual maintenance table

7.1

Annual maintenance

(To remove front cover, see page 10).

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Maintenance and service
Venting System
• Venting system - inspect inside of flue pipe for any blockage
or restriction. Observe burner flames during heater
operation. (front cover must be removed). Burner flames
should be steady and blue. Yellow, inconsistent (bouncing)
flames may be an indication of poor ventilation or
combustion air supply. Inspect the combustion air inlet
pipe for blockage or debris. Inspect combustion air and
exhaust terminations for blockage or debris.
Combustion Chamber
• Inspect burner observation window (Fig. 65) for cracks or
spillage of flue gases. Observe burner flames during heater
operation. Flames should be steady and blue with no signs
of yellowing. Yellow burner flames are an indication of
improper combustion. Refer to Section 4.6, page 15 of this
manual to verify exhaust system and combustion air supply
meets manufacturer's specifications.
Pressure Relief
• Manually open the pressure relief valve to ensure proper
operation.
Inlet Water Filter
• Verify the inlet water filter screen is clean and undamaged.
The inlet water filter is located on the top of the appliance,
at the cold water inlet connection. (See Fig. 29, page 34).
Close the installer supplied water shutoff valve and remove
the brass hex cap holding filter. Remove the filter, clean
and/or replace if damaged.
Descaling
• In areas where the water supply has a high mineral content,
the heat exchanger should be flushed with a descaling
solution. Scale build up will shorten the life of the water
heater, and damage resulting from scale is not covered
under warranty. Refer to section 7.3 for detailed
instructions on descaling the heat exchanger.
Condensate siphon
• Check for debris and clean if needed.

7.2

Winterizing for seasonal use

The water heater must not be installed in a location where it
may be exposed to freezing temperatures. If the heater must be
left in a space which is likely to experience freezing
temperatures, all water must be drained from the heater.
NOTE: Use of agents such as anti-freeze is not permitted and
voids the warranty, as they may cause damage to the water
heater's internal components.
1. Press ON/OFF switch on the water heater to turn OFF the
heater and unplug power supply cord. The display should
be blank.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

2. Shut off the gas supply to the water heater.
3. Shut off the water supply to the water heater using installer
supplied shutoff valve.
4. Open hot water taps to drain and relieve pressure from the
plumbing system. If water continues to flow after 5
minutes, a crossover of the hot and cold water pipes is
present and must be corrected before proceeding.
5. Disconnect inlet and outlet water pipes from the water
heater. Place a small bucket underneath the water heater
to catch residual water remaining inside the water heater.
6. Using an air compressor, blow short bursts of air (100psi
max) through the inlet water connection or inlet water filter
until there is no water present coming through the outlet
water connection of the heater.
7. Empty condensate siphon.
8. Reconnect the water fittings and return the heater to
service when danger of freezing has passed.

7.3

Mineral scale build-up

Periodic descaling may be necessary in areas with high mineral
content in the water. Scale buildup in the heat exchanger may
result in lower flow rates, error codes of AA and E5 and boiling
sounds in the heat exchanger.
A water softener is required if the water hardness exceeds 6
grains/gal (180 mg/l) calcium carbonate. Damage to the water
heater resulting from hard water/scale deposits will not be
covered under warranty.
Descaling using a pump
▶ Disconnect electrical supply from the water heater.
▶ Shut off the water supply to the water heater using
(installer supplied) shutoff valve.
▶ Open hot water taps to drain and relieve pressure from the
plumbing system.
▶ Drain water from the unit's heat exchanger by
disconnecting inlet and outlet water connections from the
heater.
▶ Connect a line (A) from the outlet of the circulating pump
(installer supplied) to the inlet water fitting on the water
heater (see fig. 53).
▶ Using another line (B), connect the water outlet fitting on
the water heater. Route the other end of this line into a
descaling reservoir.
▶ Using a 3rd line (C) from the descaling reservoir, connect
to the inlet side of circulating pump. Install a filter on the
end of the line in the descaling reservoir.
▶ Make sure all connections are "water tight.".
▶ Fill tank with descaling solution so both lines inside are
submersed. We recommend a straight white vinegar
solution. If using a commercial descalant, refer to
manufacturer's instructions for proper dilution ratio.

Troubleshooting
▶ Operate the circulating pump.
▶ Make sure there are no leaks and the solution is flowing
from the descaling reservoir through the heater and
returning to the reservoir.
▶ Run solution through the heater until the solution returning
to the descaling reservoir comes out clear. (Changing to a
fresh solution may be necessary during this process).
▶ Disconnect all lines and drain all solution from heat
exchanger. Properly discard of solution.
▶ Close the inlet drain connection.
▶ Position a container below the hot water outlet and connect
cold water supply. Open cold water supply shutoff valve
and flush heat exchanger with clean water.
▶ Shut cold water shutoff valve and reconnect hot water
supply to the water heater.
▶ Close outlet drain connection.
▶ Reconnect electrical supply to unit, open water shutoff
valves, and return the unit to service.

Troubleshooting
CAUTION:
▶ If you are unable to perform the tasks
listed below, or need additional
assistance, please contact a service
provider or contractor.

8.1

Introduction

Many of the questions customers ask regarding operation of
this unit can be answered by following the troubleshooting
steps as outlined below. For best results, perform each step
before proceeding to the next. The suggested solutions may
require that the cover be taken off. (See fig. 3, page 10).

8.2

Burner does not ignite when hot water is
turned ON

It is recommended to use table 29 as a tool for problem solving.

Fig. 53
[1] Pump

1. If the display is blank, verify power to outlet. (120VAC/
60Hz properly grounded circuit required). Verify the
heater power supply.
2. Verify the fuses in the control board are good. To access
fuses, the control board must be removed. See chapter
5.2, page 40.
3. Make sure cold water inlet connection is plumbed to the
right side of heater when facing unit. See Fig.28, page 34.
4. A minimum of 0.45 gallons per minute (1.7 l/m) of hot
water demand is required to activate the heater. Confirm at
least 0.4 gpm flow by timing how long it takes to fill a
container. A quart container should fill in 20 seconds or
less, from hot water tap only. Gradually increase water flow
(hot water demand) through the heater to determine if the
heater activates with higher flow.
5. Clean inlet filter screen per chapter 4.10, page 33.
6. Inspect the water path for obstructions. Make sure all
shower heads, faucet aerators and whole house filters are
clear of debris.
7. Check for plumbing crossover. A crossover in the hot and
cold plumbing pipes creates back pressure on the water
flowing through the heater. Therefore, a higher flow rate
than normal is needed to force the heater to activate. To
check for a plumbing crossover, shut off the cold water
supply to the water heater. Then open all of the hot water
taps served by the heater. Wait 10 minutes and check for
water flow at each tap. There should be no water flowing.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Troubleshooting
Any continuous flow of water, small or large, indicates a
crossover is present and must be corrected. Consult a
professional plumber for help in correcting a crossover.
Failing single lever faucet mixing valves are common
causes of plumbing crossovers.
8. With the power supply OFF and the power supply cord
unplugged, remove the unit's front cover (See fig. 3,
page 10). Check wire connections between the water
valve, control unit and electrode set. See Fig. 61, page 63.

8.3

Water is too hot

1. Selected temperature on the unit is too high. To lower
output temperature, see chapter 6.4, page 42.
2. Confirm the heater's gas type coincides with the type of gas
being supplied. See fig. 2, page 10 for location of rating
plate.
3. In areas where the water has a high mineral content,
periodic descaling may be necessary. See chapter 7.3,
page 49 for directions.

8.4

Water is not hot enough

1. Selected temperature on the unit is too low. To raise output
temperature, see chapter 6.4, page 42.
2. Confirm the heater's gas type coincides with the type of gas
being supplied. See fig. 2, page 10 for location of rating
plate.
3. Check inlet gas particle screen for blockage at gas inlet
connection on bottom of unit.
4. Verify gas pressure is in accordance with specifications in
chapter 4.15, page 39. A gas pressure reading is needed to
proceed further. Contact your original installer or a local
certified gas technician to obtain this reading.
5. Cold water is mixing into the hot water lines (plumbing
crossover). A plumbing crossover can unintentionally mix
cold water with the hot water leaving the heater. The end
result is a cooler water temperature than desired. To check
for a plumbing crossover, shut off the cold water supply to
the water heater. Then open all of the hot water taps served
by the heater. Wait 10 minutes and check all taps for water
flow. There should be no water flowing. Any continuous
flow of water, small or large, indicates a crossover and must
be corrected. Consult a professional plumber for help in
correcting a crossover. Failing single lever faucet mixing
valves are common causes of plumbing crossovers.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

8.5

Low water flow/pressure

1. Too many hot water applications are being used
simultaneously or too much flow is demanded. The water
heater will effectively support two 2.0-2.5 GPM shower
heads simultaneously or multiple sink applications. Greater
draws will result in a water pressure drop and reduced flow
at taps.
2. If selected temperature on the unit is set too high for the
demanded flow rate, the water heater will close its
motorized water valve, reducing the hot water flow rate in
an attempt to reach the selected output temperature.
Lowering the selected temperature will allow the motorized
water valve to open up for increased water flow rate.
3. Clean inlet filter screen per chapter 7.1, page 48.
4. Inspect the water path for obstructions. Make sure all
shower heads, faucet aerators and whole house filters are
clear of debris.
5. In areas where the water has a high mineral content,
periodic descaling may necessary. See chapter 7.3, page
49 for directions.

8.6

Hot water temperature fluctuates at tap

1. If the water heater set point temperature is high, mixing at
the faucet could deactivate the water heater. The addition
of too much cold will overpower hot water flow from the
tankless water heater reducing its flow below the activation
point.
If this slows the flow through the tankless water heater
below its deactivation point, it will shut off the burner.
2. Unbalanced pressure in water lines. Any restriction in the
water heater, such as a clogged inlet filter screen, can
result in unequal pressures between the cold and hot water
lines. In such cases, when mixing in the higher pressure
cold water at the tap, the lower pressure hot water can be
overpowered. This will shut down the burners because the
hot water flow rate fell below the minimum flow rate
required for activation. Verify inlet filter screen is clean and
clear of debris. See chapter 7.1, page 48 for inlet filter
cleaning instructions.
3. Heater deactivated by temperature balancing valves. If the
outlet water temperature is set too high, the heater can
produce temperatures that are too hot. A temperature
balance shower valve will automatically mix in cold water to
reduce the hot water temperature. In the event of any
temperature instability at a fixture using a temperature
balancing valve, refer to the valve manufacturer for
instructions on internal adjustment setting. An adjustment
should be made to minimize the amount of cold water the
valve is adding. Additionally, the temperature setting on
the heater can be lowered to prevent the temperature
balance valve from mixing in too much cold.

Troubleshooting
4. Inlet water pressure is erratic due to fluctuating supply
water pressure. For installation on a private well system
with the use of a pressure tank, the lowest pressure range
setting recommended is 30 - 45 psi (2.06 - 3.1 bar).
Consult your installer or local plumber for effective ways to
maintain constant water pressure to the appliance when on
a well system.

8.7

2. Verify if gas pressure is within specified range (see
section 3.2).
If gas type is properly selected, gas pressure is within range
and the problem persists:
3. Perform the gas and air adjustment as described in
section 8.11.

Noisy burner/heater during operation

Burner noises can be heard if combustion is not properly set.
This could be caused by improper gas supply conditions (gas
pressure and/or gas composition).
Two types of noise can be heard: low pitch noise/vibration
(rumbling) and high pitch noise/vibration (whistling).
8.7.1 High pitch noise
1. Verify if correct gas type is selected (see section 6.7.1).
2. Verify if gas pressure is within specified range (see
section 3.2).
If gas type is properly selected, gas pressure is within range
and the problem persists:
3. Perform the gas and air adjustment as described in
section 8.11.
8.7.2 Low pitch noise
1. Verify if correct gas type is selected (see section 6.7.1).
2. Verify if gas pressure is within specified range (see
section 3.2).
If gas type is properly selected, gas pressure is within range
and the problem persists:
3. Perform the gas and air adjustment as described in
section 8.11.

8.8

Error codes C1, C2, CF and/or CE

C1, C2, CF and CE errors could be caused by an obstruction in
the venting.
1. Verify if there are any venting obstructions and remove
them if that is the case.
2. Reset the error by holding the On/Off button for 3s.
If there are no obstructions, and the problem persists:
3. Perform the gas and air adjustment as described in
section 8.11.

8.9

Error codes EA and/or EC

EA and EC errors can appear if combustion is not properly set.
This could be caused by improper gas supply conditions (gas
pressure and/or gas composition).
1. Verify if correct gas type is selected (see section 6.7.1).

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Troubleshooting

8.10 Manifold gas pressure
The manifold gas pressure measurement is only carried out if it
is necessary to confirm the value from the rating plate.
In case of a high deviation between measured and stated
values, please proceed with Gas/air adjustment (see section
8.11)1).
▶ Turn Off the appliance.
▶ Remove the front cover of the appliance (see page 10).
Do not disconnect the wire from HMI (display).

▶ Place the front cover with the HMI near the appliance.
▶ Open all hot water taps to achieve a flow rate of at least 6
gallons per minute. (1 tub and 2 sinks should be sufficient).
If heater goes back to P2, open more hot water fixtures to
allow sufficient flow and access to P1 menu.
▶ Record the manifold gas pressure reading in table 26.
Manifold gas pressure refers to the relative pressure
between gas manifold nozzles inlet and outlet [A]-[B].
Value

Date

Manifold gas
pressure

Table 26

▶ Turn Off the appliance.
▶ Disconnect the pressure gauges from the pressure heads
points [A] and [B].
▶ Tighten the shutter screws of the pressure heads points [A]
and [B].
▶ Reassemble the front cover onto the appliance.
▶ Turn ON the appliance to return to normal operation.

8.11 Adjusting Gas/Air flow
Appliance is pre-adjusted by default with
factory parameters.

6720817984-50.1V

Fig. 54

Pressure head points

[A] Air pressure head in the box
[B] Gas pressure head in the burner
[C] Tee (installer supplied)
▶ Loosen the set screw of the pressure head point [B].
▶ Connect the pressure gauge connection "+" to the test
point [B].
▶ Loosen the set screw of the pressure head point [A].
▶ Connect the pressure gauge "-" to the pressure head point
[A].
▶ Turn On the appliance.
▶ Position the front cover near the appliance so the display
cable can be connected to the appliance.

1) Manifold gas pressure from the rating plate is valid for sea
level operation with standard gas pressure and
composition. If operating conditions are different from
those, values from section 8.11 should prevail over
manifold gas pressure to assure a correct appliance tuning.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Gas/Air adjustments are only required when;
• The appliance is converted to LPG and energy content is
more than 2820 BTU/cu ft( section 6.7.1).
• After installation, the appliance shows repeated
unresolved errors ( chapter 9).
• In Natural Gas installations where energy content is less
than 900 BTU/cu ft.
• After replacement of electronic control unit, fan or gas
valve.
Improper gas pressure will affect
combustion.
▶ Please see chapter 4.15 for more
information.
8.11.1 Automatic adjust of Gas/Air flow
▶ Press and hold simultaneously buttons
,
and
for 3 seconds.
▶ Press the buttons
or
to select UC (Combustion
Automatic Adjustment) menu.

Troubleshooting
▶ Press the button
to enter UC menu.
Automatic adjustment will begin.
▶ Open hot water taps when the display shows Tap Symbol
image (1 tub and 2 sinks should be sufficient; when there is
enough water flow the image disappears).

Fig. 55

First step - Adjust the maximum power (P1)
▶ Press the button
to turn ON.
▶ Press and hold simultaneously buttons
,
for 3 seconds, until display reads P4.

and

Combustion Auto Adjust - Open Taps
The Combustion Auto Adjust process takes
several minutes.
Steps from 1 to 7 will appear on the display.
▶ Do not interfere with the appliance
during the auto adjustment process.

▶ Wait until display shows dn blinking as a sign of calibration
complete.
▶ Touch the symbol
to exit UC menu.
Gas and Air auto adjustment is complete.
▶ In case of failure in the auto calibration
process the error sign
appears.
Verify if:
▶ Any error codes appear on the display.
See table 29.
▶ Gas type and pressure are correct.
▶ Wind conditions are stable (e.g. wind
gusts may be a cause of failure).
▶ Hot water flow is sufficient and stable
(e.g. water from a well is a potential
source of water instability).
In case of positive results for all these
actions:
▶ Exit UC menu and repeat the process.
If failure persists:
▶ Perform manual adjustment according
to chapter 8.11.2 or contact Bradford
White support line for further
assistance.

8.11.2 Manual adjust Gas/Air flow
Gas/Air flow adjustment is also possible to perform manually
(only recommended if automatic adjustment can not conclude
successfully).

Fig. 56
▶ Press the buttons
or
to select P1 (Maximum
Power) menu.
▶ Open hot water taps when the display shows Tap Symbol
image (1 tub and 2 sinks should be sufficient; when there is
enough water flow the image disappears).
▶ Press
to enter P1 adjustment.
Display shows E.
▶ Press
or
until L1 appears.
▶ Press the button
to enter L1.
Display shows L1 value.
▶ Verify if power bar level is at middle point, see fig. 57.

Fig. 57

Power bar middle point

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Troubleshooting
▶ Press the buttons
or
to adjust parameter value if
power bar level is out of range.1)

If b1 is blinking on the display,
▶ Wait until it stops.

▶ Press the button
to enter b1.
Display shows CA blinking during calibration.
▶ Wait until display shows CA blinking as a sign of calibration
complete.
▶ Press
button to finish the b1 automatic air adjust.
▶ Press the button
or
until the display shows E.
▶ Press the button
.
Display shows P1.
Fig. 58

Gas adjust - L1 parameter

▶ Press the button
for 3 seconds and appliance
assumes value.
The value blinks as a sign of confirmation.
▶ Press
button to finish the L1 gas adjust.
▶ Press the button
or
until the display shows "A1".
▶ Press the button
to enter A1.
Display shows A1 value.
▶ Verify if power bar level is at middle point, see fig. 57.
▶ Press the buttons
or
to adjust parameter value if
power bar level is out of range.2)

Fig. 59

Air adjust - A1 parameter

▶ Press the button
for 3 seconds and appliance assumes
value.
The value flashes as a sign of confirmation.
▶ Press the button
to finish the A1 air adjust.
▶ Press the button
or
until the display shows "b1".

1) Increasing L1 value will cause an increase in power bar level
and vice-versa.
2) Increasing A1 value will cause a decrease in power bar level
and vice-versa.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Troubleshooting
Second step - Adjust the Low power (P2)
Keep hot water taps opened to adjust Low
power (P2). The unit will ramp down to low
fire and the water flow should decrease
automatically.
▶ Press the buttons
or
to select P2 (Low Power)
menu.
▶ Press
to enter P2 adjustment.
Display shows E.
▶ Press
or
until L2 appears.
▶ Press the button
to enter L2.
Display shows L2 value.
▶ Verify if power bar level is at middle point, see fig. 57.
▶ Press the buttons
or
to adjust parameter value if
power bar level is out of range.1)
▶ Press the button
for 3 seconds and appliance
assumes value.
The value flashes as a sign of confirmation.
▶ Press
button to finish the L2 gas adjust (U1).
Parameter D2

▶ Only a qualified technician can change
this parameter.

▶ Press the symbol
for 3 seconds.
The display blinks to confirm change.
▶ Press the symbol
.
The factory default values for P2 are restored.

8.13 CO emission check
In case air/gas combustion adjustment has been performed
check emissions using reference values in tables 27 and 28.
8.13.1 Access to CO2 measuring port
Allow the appliance to stabilize before
performing CO/CO2 readings.
Let appliance warm up and wait for 2 or 5
minutes for each CO/CO2 readings.
This will avoid wrong CO/CO2 reading.
▶ Open a hot water tap and let the appliance work for 2 or 5
minutes.
▶ Remove the screw from the flue adaptor on the left side of
the appliance, as seen in fig. 60.
▶ Insert CO2 analyzer probe into the measuring port. The tip
of the probe should be in the center of the flue pipe (approx
1.5" inserted). Avoid air gaps between probe and
measuring port as they can alter readings.

Gas and Air adjustment is complete.

8.12 Factory default settings
Restore factory values for P1
▶ Access to menu P1.
▶ Press symbols
or
to select rP (Reset
Parameters).
▶ Press the symbol
to select rE.
▶ Press the symbol
for 3 seconds.
The display blinks to confirm change.
▶ Press the symbol
.
The factory default values for P1 are restored.
Restore factory values for P2
▶ Access to menu P2.
▶ Press symbols
or
to select rP (Reset
Parameters).
▶ Press the symbol
to select rE.

Fig. 60

C02 measuring port

1) Increasing L2 value will cause an increase in power bar level
and vice-versa.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Troubleshooting
8.13.2 CO2 and CO values
RTG-K-199N/X1

CO2 range (%)

Max. CO level
(measured)

Nat. Gas
max. input

8.4 % - 9.0 %

< 250 ppm

min. input

N/A

< 100 ppm

LP Gas
max. input

9.7 % - 10.4 %

< 250 ppm

min. input

N/A

< 100 ppm

CO2 range (%)

Max. CO level
(measured)

Nat. Gas
max. input

8.5 % - 9.1 %

< 250 ppm

min. input

N/A

< 100 ppm

LP Gas
max. input

10.0 % - 10.6 %

< 250 ppm

min. input

N/A

< 100 ppm

* Values above are for climate controlled conditions.
Inputs such as gas pressure, heating value of the gas,
humidity and temperature of combustion air all impact
CO and CO2 values. Changes in these inputs can result in
different CO and CO2 values on the same appliance.
Table 28 CO2 & CO target numbers
8.13.3 Returning to Service
▶ Disconnect the pressure gauges from the pressure heads
points [A] and [B].
▶ Tighten the shutter screws of the pressure heads points [A]
and [B].
▶ Place front cover in the appliance.
▶ Remove CO2 analyzer probe and reinstall screw in flue
accessory.
▶ Turn OFF the appliance and then turn ON the appliance.
The appliance is ready for normal operation.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Problem solving

9.1

Error code diagnostics
To remove error code from the display, press
and hold on/off button for 3 seconds.

Fitting, maintenance and repair must only be carried out by
qualified contractors. The following table describes the
solutions for possible problems (solutions followed by footnote
must only be carried out by qualified contractors).

Display

Description

Solution

Water temperature sensor [17] [19] [20]
disconnected or damaged.

▶ Check sensor wire connections.1) 2)
▶ Replace the sensor and/or wire connections, if
the problem persists.1)

Air temperature inside the cabinet [18] is above
▶ External air temperature is above 140 °F.
158 °F. Appliance regulates power to protect against ▶ Check for flue leakages inside the appliance 1)
overheat.

External water temperature sensor/aquastat [21]
disconnected, damaged or not properly installed.

Flue gases temperature sensor [15] disconnected or ▶ Check sensor wire connections.1) 2)
damaged.
▶ Replace the sensor and/or wire connections, if
the problem persists. 1)

Air temperature sensor [18] disconnected or
damaged.

▶ Check sensor wire connections.1) 2)
▶ Replace the sensor and/or wire connections, if
the problem persists. 1)

Condensing unit flue temperature sensor [16]
disconnected or damaged.

▶ Check sensor wire connections.1) 2)
▶ Replace the sensor and/or wire connections, if
the problem persists. 1)

Inlet cold water temperature sensor [20]
disconnected or damaged.

▶ Check sensor wire connections.1) 2)
▶ Replace the sensor and/or wire connections, if
the problem persists. 1)

Heat exchanger hot water temperature sensor [16]
disconnected or damaged.

▶ Check sensor wire connections.1) 2)
▶ Replace the sensor and/or wire connections, if
the problem persists. 1)

Outlet hot water temperature sensor [17]
disconnected or damaged.

▶ Check sensor wire connections.1) 2)
▶ Replace the sensor and/or wire connections, if
the problem persists. 1)

▶ Check temperature sensor and associated
connections.1) 2)
▶ Check sensor position in the tank pocket.
▶ Verify if correct recirculation settings are in use
(section 6.5.3).
▶ Replace the sensor and/or wire connections, if
the problem persists. 1)

Table 29

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Problem solving

Display

Description

Solution

Incorrect output power (too low).

▶ Check gas inlet pressure ( section 4.15).1)
▶ Check water temperature sensors
[17][19][20] and water flow sensor [14] wire
connections.
▶ Check sensor’s resistance and water flow
sensor( section 11) and replace any if it is not
according to specification. 1)2)

Condensing unit flue gases temperature [16] above
392 °F and/or flue gases temperature [15] above
145 °F at the exhaust sensor [15]. Appliance
regulates power to protect against overheating.

▶ Descale appliance (section 7.3). 1)

Fan calibration triggered due to missed ignitions.

▶ Check gas inlet pressure ( section 4.15).1)
▶ Perform gas and air tuning ( section 8.11). 1)

Successive fan calibration with similar learned
values.

▶ Check gas inlet pressure ( section 4.15).1)
▶ Perform gas and air tuning ( section 8.11). 1)

C1
C2

Flue blockage detected during startup due to
insufficient combustion air.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check air intake and exhaust pipes and
terminals for obstructions and reset the error.
▶ Check if flue length is according to specification
(section 4.6) and reset the error.
▶ Perform gas and air tuning ( section 8.11). 1)

Flow sensor [14] does not detect water
recirculation.

▶ Check pump and connections.1)
▶ Check recirculation circuit for any blockage.

Bypass water valve [8] disconnected or damaged.

▶ Check bypass water valve wire connections.1)
If the problem persists:
▶ Replace the bypass water valve and/or wire
connections. After valve replacement, proceed
with bypass water valve calibration
(section 6.6).1)

Fan [2] disconnected or damaged.

▶ Check fan wire connections.
▶ Reset error (press and hold on/off button for 3
seconds)
If the problem persists:
▶ Replace the fan and/or wire connections.1)

Main water valve [22] disconnected or damaged.

▶ Check main water valve wire connections.1)
If the problem persists:
▶ Replace main water valve and/or wire
connections. After valve replacement, proceed
with main water valve calibration
(section 6.6).1)

Barometric pressure sensor fault.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit (ECU). 1)

Table 29
RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Problem solving

Display

Description

Solution

Water flow above 9.2gpm.

▶ Disconnect the appliance and purge hydraulic
circuit to remove air.1)
▶ Install water flow restrictor.1)
▶ Check water pressure does not exceed 150psi
(section 3.2).

Flue blockage detected during operation due to
excessive pressure on the siphon.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check exhaust pipes and terminals for
obstructions and reset the error.
▶ Check if flue length is according to specification
(section 4.6) and reset the error.
▶ Perform gas and air tuning ( section 8.11). 1)

Flue blockage detected during operation due to
insufficient combustion air.

Electronic control unit internal error.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.1)

Hot water temperature above 194 °F.
Appliance burner cut off to prevent scalding and
reactivation after cooling down.

▶ Disconnect the appliance and purge hydraulic
circuit to remove air.
If the problem persists:
▶ Reduce setpoint temperature to minimize
temperature instabilities.

Flue gas temperature above 167 °F (residential) or 2 ▶ Descale appliance ( section 7.3).1)
minutes above 145 °F.
▶ Reset error (press and hold on/off button for 3
Appliance burner cut off to prevent overheating.
seconds).
If the problem persists:
▶ Check sensor resistance [15] (section 11)
and replace the sensor if it is not according to
specification.1)2)

Air temperature inside cabinet above 176 °F or 2
minutes above 158 °F.
Appliance burner cut off to prevent overheating.

▶ Check for flue gas leakage inside the cabinet or
concentric vent.1)
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check sensor resistance [18] (section 11)
and replace the sensor if it is not according to
specification. 1) 2)

Table 29

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Problem solving

Display

Description

Solution

Condensing unit flue gas temperature above 428 °F
or 2 minutes above 392 °F.
Appliance burner cut off to prevent overheating.

▶ Descale appliance ( section 7.3). 1)
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check sensor resistance [16] (section 11)
and replace the sensor if it is not according to
specification.1) 2)

Electronic control unit internal error.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.1)

Error during ionization test. Electronic control unit
internal error.

▶ Replace electronic control unit.1)

Thermal fuse [13] broken.

▶ Replace thermal fuse.1)

Ignition failure.

▶ Check gas inlet pressure ( section 4.15).1)
▶ Perform gas and air tuning ( section 8.11). 1)

Electronic control unit internal error.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.1)

Flame lost during operation.

▶ Check gas inlet pressure ( section 4.15).1)
▶ Perform gas and air tuning ( section 8.11). 1)

Gas valve modulation solenoid [7] disconnected.

▶ Check gas valve wire connection.1)
If the problem persists:
▶ Replace the gas valve and/or wire connections
and/or electronic control unit. For gas valve
replacement perform gas and air tuning (
section 8.11).1)

Wrong gas connected (LP instead of NG) for current
appliance configuration.

▶ Check gas type ( section 6.7).1)

Electronic control unit internal error.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.1)

Electronic control unit internal error.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.1)

Electronic control unit internal error.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.1)

Table 29

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Problem solving

Display

Description

Solution

Electronic control unit internal error.

▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.1)

Gas valve driver internal fault.

▶ Check gas valve wire connections.1)
If the problem persists:
▶ Replace the wire connections and/or electronic
control unit.1)

Gas leakage in the gas path (gas valve or gas manifold ▶ Replace the gas valve and/or gas manifold.1)
shut-off valves).
▶ After gas valve and/or gas manifold replacement
perform gas and air tuning ( section 8.13). 1)

Control buttons pressed for more than 30s.

▶ Release the button.

Display show
but without
existence of solar
thermal system.

Power demand lower than appliance minimum
output power.

▶ Increase the hot water flow.
▶ increase the setpoint temperature.

Display show
and water
temperature low.
Display shows “--”

Display is not communicating with Electronic Control ▶ Reset the appliance by unplugging it for some
Unit.
seconds (at least 10) and plug it back in.
▶ Replace the display and/or wire connections
and/or electronic control unit.

High pitch noise
(whistling)

Combustion flame with gas in excess or lack of air.

▶ Check if gas type is correct ( section 6.7).1)
▶ Check gas inlet pressure ( section 4.15).1)
▶ Perform gas and air tuning ( section 8.11).1)

Low pitch noise
with vibration
(rumbling)

Combustion flame with air in excess or lack of gas.

▶ Check if gas type is correct ( section 6.7).1)
▶ Check gas inlet pressure ( section 4.15).1)
▶ Perform gas and air tuning ( section 8.11).1)

Table 29
1) only to be carried out by qualified contractors.
2) see temperature resistance charts in fig. 62 and 63.
Note: If the appliance is locked for safety reasons, information is shown on the display to give more information on the problem.
Once the problem is solved, you may have to press the ON/OFF button for 3 sec. to restart the appliance.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Electrical diagram

Fig. 61

Electrical diagram

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Electrical diagram
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]

Ionization sensor
Fan
Ignition electrode
Power supply
Connection for anti freeze kit
Connection for remote control
Gas valve - Modulation
Water bypass valve
Electrovalve 3
Electrovalve 1
Electrovalve 2
Gas valve - Solenoide safety
Thermofuse
Water flow sensor
Exhaust temperature sensor
Exhaust temperature sensor - Between chambers
Water outlet bypass temperature sensor
Cabinet temperature sensor
Water outlet HC temperature sensor
Water inlet temperature sensor
Tank temperature sensor
Water valve
Connector
HMI connection

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Sensor resistance charts

(70)

248
230
212
194
176
158
140

(50) (60)

122
104
86

(20) (30) (40)

50
-4

32
-40

TEMPERATURE ºF (ºC)

(10)
(-40) (-30) (-20) (-10) (0)

0.1

100

RESISTANCE (KOHM)

6720816948-40.1V

464
428
392
356
320
284
248
212
176
140
104
68
-4
-40

(100) (120) (140) (160) (180) (200) (220) (240)
(80)
(-20)
(-40)

(0)

(20)

(40)

TEMPERATURE ºF (ºC)

Inlet, outlet and heat exchanger water temperature sensors characteristics

(60)

Fig. 62

(80) (90) (100) (110) (120)

Sensor resistance charts

-22

0.01

0.1

RESISTANCE (KOHM)

Fig. 63

100
6720816948-41.1V

Flue gases and condensing unit flue gases temperature sensors characteristics

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Software main menu structure

Software main menu structure
Main Menu

PC - Cascading

P4 - Information

OF - Off

E - exit

SL - Slave

OD - Operation Data

MA - Master

E - Exit

SA - Settings

0D Chamber NTC

E - Exit

1D Inlet NTC

A1 - Recirculation

2D Outlet NTC

OF - OFF

3D Flow Rate

HR - House
Recirculation

4D Barometric
Pressure
5D Fan Speed
6D Output Power(%)
7D SS Hex NTC
8D Exhaust Gas NTC
9D Ambient NTC
10D External Tank

TI - Tank Loading
Internal NTC
TE - Tank Loading
External NTC
TA - Tank Loading
Aquastat
A8 - Startup Delay
(0-60)

11D Op. Cycles

A9 - Units Set
(ºC/ºF)

12D Op. Hours

AB - Region Selection
(NA/EU)

FH - Failure History
E - Exit

RS - Recirculation
Settings
LM - Temperature Limit

1F Recent failure
...

10F Older failure
P7 - Gas Type (LP, NA)

PE - Appliance Type
E - Exit
TP - Appliance Type
(Re/Co)

AP - Appliance Power
(160 / 199)
MO - Appliance Model
(IN / OUT)
PF - Bypass (EN/DI)
PA - Actuator Calibration
E - Exit
BP - Bypass Valve
MF - Main Valve
IC - ICC
E - Exit
P0 - Minimum Power
P1 - Maximum Power
E - Exit
A1 - Air Adjust 0-40
L1 - Gas Adjust 0-40
B1 - Auto Adjust
RP - Reset Parameters
IC - ICC (On/Off)
P2 - Low Power
E - Exit
D2 - Lambda Adjust
L2 - Gas Adjust
RP - Reset Parameters
UC - Automatic Calibration
P3 - Powerbus Address

P9 - Purge Mode
6720817984-52.1V

Fig. 64

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Interior components diagram and parts list

13.1 Interior components

Fig. 65
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]

Components

Air fan
Control unit
Gas manifold
Burner
Heat exchanger
Condensing unit
Water valve
By-pass
Gas valve
Condensate siphon
Ionization sensor
Ignition electrodes

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Interior components diagram and parts list

Fig. 66

Appliance overview

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

Protecting the environment

Packing
The packing box may be fully recycled as confirmed by the
recycling symbol
.
Components
Many parts in the heater can be fully recycled in the end of the
product life. Contact your city authorities for information about
the disposal of recyclable products.
Saving water resources:
▶ Make sure you close all the taps after any use. Avoid leaving
the taps dripping. Repair any leaking tap.
▶ Define the temperature you want, in the appliance. This
way you have the precise water flow needed (mixing cold
water to regulate temperature will increase the water flow
with consequent waste of water).

Installer Checklist to be completed by
installer upon installation

Serial Number

___ ___ ___ ___ ___ ___ ___ ___

Gas Pressure Reading 1)
Static
Operating
Water Pressure
Building Water Pressure
Range if on Well system

Installing Company
Installer name
Address
Phone
Table 30
1) See Chapter 4.15, page 39 and gas pressure table (to be
filled out by installer)

Installation manual should be left with the
owner after the installation is tested and
completed.

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

LIMITED TANKLESS HEATER WARRANTY

BRADFORD WHITE CORPORATION
LIMITED INFINITI TANKLESS™ K-SERIES WATER HEATER WARRANTY
WHAT DOES THIS LIMITED WARRANTY COVER?
This limited warranty covers both the heat exchanger and
component parts for leakage or other malfunction caused by
defects in materials and/or workmanship. It applies to the
original consumer purchaser and to any subsequent owner
as long as the heater remains installed at its original place of
installation and installation is performed by a Bradford White
Certified Installer.

WHAT DOES THIS LIMITED WARRANTY NOT
COVER?
1. This limited warranty does not cover leakage or other
malfunctions caused by:
a) Defective installation, reinstallation at another
location, installation by other than a Bradford White
Certified Installer and specifically, any installation
which is made:
i) in violation of applicable state or local plumbing,
housing or building codes, or
ii) without a certified American Gas Association,
ASME, or comparable pressure relief valve, or
iii) contrary to the written instructions furnished with
the unit.
b) Adverse local conditions, and specifically sediment or
lime precipitate in the heat exchanger; corrosive
elements in the atmosphere; or water quality contrary
to the written requirements furnished with the unit.
c) Misuse, and specifically operations and/or
maintenance contrary to the written instructions
furnished with the unit, anode removal (if provided),
disconnection, alteration or addition of non-approved
components or apparatus, operation at settings other
than those set forth on the rating plate, or accidental
or other exterior damage.
2. This warranty also does not cover:
a) Production of noise, taste, odors, discoloration or
rusty water.
b) Incidental property damage, loss of use,
inconvenience or other incidental or consequential
costs.
c) Costs associated with the replacement and/or repair
of the unit, including:
i) any freight, shipping or delivery charges
ii) any removal, installation or re-installation charges
iii) any material, and/or permits required for
installation, re-installation or repair
iv) charges to return the defective heater and/or
component part to the manufacturer.
WHAT IS THE PERIOD OF COVERAGE?
This limited warranty runs from date of installation (or
without proof of installation, from three (3) months after the
date of manufacture) for the period specified on the following
table.

FIFTEEN YEAR LIMITED HEAT EXCHANGER
WARRANTY*
A no charge* replacement will be provided in the
event of a covered failure of the Heat
Exchanger.
FIVE YEAR LIMITED PARTS WARRANTY*
All other parts not referenced above are
covered for five years from date of original
installation.
--------------------------------------------------------------*Note: Limited heat exchanger warranty fifteen
(15) years or 8,000 operational hours; whichever
is shorter. Limited parts warranty is five (5) years
or 8,000 operational hours; whichever is shorter. A
warranty product or part is provided exclusive of
labor, freight and/or any installation costs. Any
product used for other than a single-family
housing unit application will be warranted for only
eight (8) years on heat exchanger and five (5) year
on parts regardless of any other warranty period
specified. All replacement heaters and parts carry
the balance of the original warranty, i.e. if an
original fifteen (15) year warranted heater
develops a leak due to defects in
materials/workmanship after only eight (8) years
and 5,000 operational hours, the replacement unit
is warranted for seven (7) years and 3,000
operational hours in this example.
ANY IMPLIED WARRANTIES, INCLUDING
THE WARRANTY OF MERCHANTABILITY
IMPOSED ON THE SALE OF THE WATER
HEATER UNDER THE LAWS OF THE STATE
OF SALE ARE LIMITED IN DURATION TO ONE
YEAR FROM DATE OF ORIGINAL
INSTALLATION.
HOW DOES STATE LAW RELATE TO THE
WARRANTY?
Some states do not allow:
1. Limitations on how long an implied warranty
lasts.
2. Limitations on incidental or consequential
damages.
So, the above limitations or exclusions may not
apply to you.
This warranty gives you specific legal rights,
and you may also have other rights which vary
from state to state.

WHAT IS THE DURATION OF THE IMPLIED
WARRANTY?
xRestrictions are not applicable to implied warranties in California. See “Special State Provisions” on reverse side.
238-53321-00A (7/18)

Fig. 67
70

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

LIMITED TANKLESS HEATER WARRANTY

LIMITED TANKLESS HEATER WARRANTY (CONTINUED)
WHAT WILL WE DO TO CORRECT PROBLEMS?
1. If a defect occurs within the heat exchanger warranty
period, we will:
Provide a replacement heater of our manufacture, (or at
our option) repair any unit, which develops a leak in the
heat exchanger within the warranty period. To obtain a
replacement, you must forward both the rating plate from
the defective unit to us and a copy of the original sales
receipt. If government regulations require the
replacement heater to have features not found in the
defective heater, you will be required to pay the difference
in price represented by those government required
features.
2. If a defect occurs within the parts warranty period, we will:
Provide a replacement part (or at our option repair) any
part which fails to function within the parts warranty
period. To obtain a replacement, you must forward the
defective part to us. If government regulations require the
replacement part to have features not found in the
defective part, you will be required to pay the difference in
price represented by those government required features.
We do reserve the right to verify any claims of defect by
inspection.
WHAT WILL WE NOT DO?
We will not:
1. Repair or replace any heater, or part, subject to
conditions outlined in “What Does This Limited Warranty
Not Cover?”
2. Reimburse any costs associated with repair and/or
replacement.
3. Replace and/or repair any heater without complete
model/serial number.
4. Replace any heater without prior receipt of actual rating
plate from appliance and copy of original sales receipt.

WHAT SHOULD YOU DO TO KEEP THE
WARRANTY IN EFFECT?
To facilitate warranty assistance, you should:
1. Follow all instructions enclosed with the
product.
2. Retain all bills of sale or receipts for proof of
installation, etc.
3. Contact your installer, dealer or our Warranty
Department as soon as any problem or defect
is noticed.
4. When necessary, allow us, or our chosen
representative, to inspect the unit.
5. For your reference, fill in the Model and Serial
Number found on the units Rating Plate:
Model Number ______________________________
Serial Number ______________________________
Date of Installation ___________________________
Name of Installer ___________________________

SPECIAL STATE PROVISIONS
For heaters installed in California or Oregon,
Paragraphs 2(c) (i) (iv) of the paragraph
“WHAT DOES THIS WARRANTY NOT COVER?”
does not apply.
All other terms and conditions of this warranty
apply as stated.

HOW DO YOU GET WARRANTY ASSISTANCE?
Upon discovering a defect or problem, you should:
1. Contact either the Bradford White Certified Installer or
dealer, or
2. Contact us-
BRADFORD WHITE CORPORATION

WARRANTY SUPPORT GROUP

445 EAGLE DR.

MIDDLEVILLE, MI 49333

1-800-531-2111

PLEASE RETAIN THIS WARRANTY IN A SAFE LOCATION FOR FUTURE REFERENCE.

238-53321-00A (7/18)

Fig. 68

RTG-K-199/160N/X1 – 6 720 817 984 (2018/09)

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