Bradford White RTG 199 MEN, RTG 199 MEX Installation And Operation Instructions Manual

Installation and Operation instructions

Warning: If the information in this manual is not followed exactly, a fire

or explosion may result causing property damage, personal injury or
death.
Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
Installation and service must be performed by a trained and certified
installer, service agency or the gas supplier.

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.

In the Commonwealth of Massachusetts this product must be installed
by a licensed plumber or gas fitter.

Upon completion of the installation, these instructions should be
handed to the user of the appliance for future reference.

What to do if you smell gas

• Turn off the gas shut-off valve. Open windows and doors.

• Do not try to light any appliance.

• Do not touch any electrical switch, telephone, and do not use out­lets.

• Extinguish all open flames. Do not smoke! Do not use lighters!

• Warn all occupants of the building. Do not ring doorbells!

• If you can hear gas leaking, leave the building immediately. Prevent
others from entering the building and notify the police and fire
department from outside the building.

• From outside the building, call the gas utility company and a trained

and certified installer.

INDOOR MODEL

RTG 199 ME

RTG 199 MEN - Natural Gas
RTG 199 MEX - Propane (LP Gas)

Temperature Modulated with Electronic Ignition Suitable for heating potable water and space heating

(Intended for variable flow applications)

6 720 811 615 / 238-50792-00A (2015/04)

Table of contents

Table of contents

1 Key to symbols and safety instructions . . . . . . . . . . . . . . . . . . . 3

1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 FCC rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Appliance details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Specifications (Technical data) . . . . . . . . . . . . . . . . . . . . 7

3.3 Unpacking the heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4 General rules to follow for safe operation . . . . . . . . . . . . 9

3.5 Dimensions and minimum installation clearances . . . 10

4 Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1 Specialized tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.3 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.4 Combustion air requirements . . . . . . . . . . . . . . . . . . . . 24

4.5 Proper location for installing your heater . . . . . . . . . . 24

4.6 Heater placement and clearances . . . . . . . . . . . . . . . . 25

4.7 Hanging appliance on the wall . . . . . . . . . . . . . . . . . . . 25

4.8 Mounting installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.9 Gas piping & connections . . . . . . . . . . . . . . . . . . . . . . 27

4.10 Water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.11 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.12 Domestic hot water recirculation . . . . . . . . . . . . . . . . . 30

4.13 Space heating applications . . . . . . . . . . . . . . . . . . . . . . 31

4.14 Measuring gas pressure . . . . . . . . . . . . . . . . . . . . . . . . 32

5 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.1 Electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.2 Position of the fuses in control unit . . . . . . . . . . . . . . . 33

8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.2 Burner does not ignite when hot water is turned ON . . 42

8.3 Water is too hot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.4 Water is not hot enough . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.5 Low water flow/pressure . . . . . . . . . . . . . . . . . . . . . . . . 42

8.6 Hot water temperature fluctuates at tap . . . . . . . . . . . . 43

8.7 Noisy burner/heater during operation . . . . . . . . . . . . . . 43

9 Problem solving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.1 Error code diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . 44

10 Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

11 Sensor resistance charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

12 Functional scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

13 Interior components diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 50

13.1 Interior components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

14 Protecting the environment . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

15 LIMITED TANKLESS HEATER WARRANTY . . . . . . . . . . . . . . . . 52

16 Installer Checklist to be completed by installer upon

installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

6 Operation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.1 Description LCD Display . . . . . . . . . . . . . . . . . . . . . . . . 34

6.2 For your safety read before operating

your water heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.4 Temperature selection . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.6 Reset button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.7 Program button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.8 Locked condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7 Maintenance and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.1 Annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.2 Winterizing for seasonal use . . . . . . . . . . . . . . . . . . . . . 37

7.3 Mineral scale build-up . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.4 Adjusting CO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.5 Program values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

7.6 Control board diagnostics . . . . . . . . . . . . . . . . . . . . . . 41

2

RTG 199 ME – 6 720 811 615 (2015/04)

1 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.

Key to symbols and safety instructions

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 a trained and certified installer.

Insufficient ventilation may cause toxic flue gas to escape. Risk of
poisoning.

▶ Never close off or reduce the size of the air intake and outlet

openings.

▶ The appliance must not be operated until any obstructions have been

removed.

▶ Inform the system operator in writing of the problem and the

associated dangers.

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

1.2 Safety instructions

Read all instructions before installing. Perform the steps in the indicated
sequence. Have the water heater inspected by a trained service
technician at least once every year. Failure to comply with these
instructions can result in severe, possibly fatal, personal injury as well as
damage to property and equipment.

Installation and servicing

▶ Risk of fire when soldering and brazing!

Take appropriate protective measures when soldering and brazing
around combustible and flammable material.

▶ Ensure that only a licensed contractor installs or services the water

heater.

▶ On hot components use only material with adequate temperature

stability.

Installation and commissioning

▶ In the Commonwealth of Massachusetts, the water heater must be

installed by a licensed plumber.

▶ Do not install this device in rooms with a high moisture level

(e.g. bathrooms, saunas).

Function

▶ To ensure that the water heater functions properly, follow these

installation and maintenance instructions.

▶ Never close the blow-off line of the T&P safety valve. For safety

reasons, water may escape during heating.

Danger from escaping flue gases

▶ Ensure all vent pipes and chimneys are not damaged or blocked.
▶ Connect only one appliance to each vent system or chimney liner.
▶ The venting system piping must not feed into another air extraction

duct.

▶ Do not route the flue system piping through or inside another air

extraction duct.

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.

RTG 199 ME – 6 720 811 615 (2015/04)

3

Key to symbols and safety instructions

Risk of scalding at the hot water draw-off point

▶ When the water heater is in operation, temperatures in excess of

122 °F (50 °C) can occur. To limit the temperature at the tap, install
a thermostatic DHW mixing valve.

▶ Water heated for washing the laundry, dishes and for other cleaning

purposes can cause scalding and permanent injuries.

▶ Children, elderly, and handicapped persons are more likely to be

permanently injured by hot water. Never leave such individuals in the
tub or shower unattended under any circumstances. Children must
not be allowed to operate hot water faucets themselves or to fill a
bathtub.

▶ If the building has occupants in the above groups who operate hot

water faucets, or state laws / local ordinances stipulate specific
water temperatures, take the following precautions:

– Use the lowest possible temperature setting.
– To prevent scalding, install a tempering device, such as an

automatic mixing valve, at hot water tap or water heater. Select
and install the automatic mixing valve in accordance with the
valve manufacturer's recommendations and instructions.

▶ Water exiting from drain valves can be extremely hot. To avoid

injuries:
– Check that all connections are tight.
– Direct exiting water away from people.

▶ Measures must be taken to protect against excessive temperature

and pressure! Installation of a T&P safety valve is required.

To protect against corrosion and ensure compliance with the rules for
electrical safety, observe the following points:

▶ 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 the ground

conductor (including metal fittings).

Maintenance
Customers are advised to:

▶ Sign a maintenance and inspection contract with an authorized

contractor. Inspect and maintain the water heater as necessary and

on a yearly basis. Service as needed.
▶ Use only genuine spare parts.

Flooding

▶ After a flood, do not use the appliance if any part has been

submerged. Damage to appliances that have been submerged can be

quite severe and pose numerous safety risks.
▶ Every appliance that has been submerged must be replaced.

4

RTG 199 ME – 6 720 811 615 (2015/04)

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 8, page 13 (In
Canada use only ULCS636 approved material). Vent
and combustion air connector piping must be sealed
gas-tight to prevent flue gas spillage, carbon
monoxide emissions and risk of fire, resulting in
severe personal injury or death. Approved vent
terminations must be used when penetrating to the
outside.

WARNING:

▶ The maximum inlet gas pressure must not exceed the

value specified by the manufacturer and the
minimum value listed is for the purpose of input
adjustment.

NOTICE:

▶ If a water heater is installed in a closed water supply

system, such as one having a backflow preventer in
the cold water supply line, means shall be provided
to control thermal expansion. Contact the water
supplier or local plumbing inspector on how to
control this situation.

WARNING: Fire danger!
▶ Keep appliance area clear and free from combustible

materials, gasoline and other flammable vapors and
liquids.

NOTICE:

▶ Do not obstruct the flow of combustion and

ventilation air.

DANGER: Electric shock!
▶ Field wiring connections and electrical grounding

must comply with local codes, or in the absence of
local codes, with the latest edition of the National
Electric Code, ANSI/NFPA 70, or in Canada, all
electrical wiring must comply with the local codes
and the Canadian Electrical Code, CSA C22.1 Part 1.

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

▶ Before servicing the water heater, unplug power

supply cord from outlet. Failure to do so could result
in severe personal injury or death.

WARNING: Damage to the appliance from over
pressure.

▶ The heater must be disconnected from the gas

supply piping system during any pressure testing of
that system at test pressures equal to or more than

0.5 psi.

NOTICE:

▶ The appliance should be located in an area where

leakage of the heater or connections will not result in
damage to the area adjacent to the appliance or to
lower floors of the structure. When such locations
cannot be avoided, it is recommended that a suitable
drain pan, adequately drained, be installed under the
appliance. The pan must not restrict combustion air
flow.

NOTICE: Appliance malfunction!
▶ If power is lost while appliance is operating. Turn off

both water and power for 15 seconds to reset
device.

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.

WARNING: Property damage!
▶ If the water heater is used in a space heating

application, all piping and components connected to
the water heater must be suitable for use with
potable water.

RTG 199 ME – 6 720 811 615 (2015/04)

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.

5

FCC rules

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.

WARNING: Installation in mobile homes.
▶ Installation in mobile homes shall conform to Title 24

CFR, part 3280 and/or CAN/CSA Z240 MH Series,
Mobile Homes.

2 FCC rules

FCC: This device complies with Part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.

Temperature Time to severe scalding

1)

120 °F (48 °C) longer than 5 minutes
125 °F (51 °C) 1.5 to 2 minutes
130 °F (54 °C) approx. 30 seconds
135 °F (57 °C) approx. 10 seconds
140 °F (60 °C) less than 5 seconds
145 °F (62 °C) less than 3 seconds
150 °F (65 °C) approx. 1.5 seconds
155 °F (68 °C) approx. 1 second

Table 2 Approximate time-temperature relationship until there is a risk

of scalding

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.

Fig. 1

The chart below shows the relationship between water temperature and
time until there is a risk of scalding. It can be used as the basis for
determining the safest water temperature for your application.

6

RTG 199 ME – 6 720 811 615 (2015/04)

Appliance details

3 Appliance details

3.1 Features

Parts

• Key Pad interface control.

• High power pre-mix compact burner with low NOx emissions.

• Modulating Gas Valve with constant gas:air ratio control.

• Modulating water valve for improved comfort and temperature
control.

High quality materials for long working life

• Copper heat exchanger.

• High efficiency Ceramat Burner.

• Compact space saver: mounts on a wall with a supplied bracket.

Features

• Easily removable one-piece cover.

• On/Off and Temperature control switches.

• Reset button.

• Program button (Selectable temperature default).

• Failure codes for easy diagnostics and repair.

• Real-time diagnostics for troubleshooting/informational purposes.

• Built in freeze prevention.

Note: The freeze prevention kit is designed to provide protection for the
water heater down to approximately 5 °F for short term conditions only.
It will not protect the appliance in areas where the temperature is
routinely expected to be below freezing.

- The freeze prevention kit will not protect plumbing outside the

appliance from freezing. Precautions should be taken.

Bradford White is constantly improving its products,
therefore specifications are subject to change without
prior notice.

3.2 Specifications (Technical data)

Approved in US/Canada

Technical characteristics Units RTG 199 ME
Capacity

Maximum flow rate at a 45 °F
(25 °C) rise
Maximum flow rate at a 55 °F
(30.6 °C) rise
Maximum flow rate at a 75 °F
(41.7 °C) rise
Maximum flow rate at a 90 °F
(50 °C) rise
Maximum output BTU/hr (kW) 160,500 (47)

Maximum input BTU/hr (kW) 199,000 (58.3)

Thermal efficiency (Efficiency
in %)
Minimum Input BTU/hr (kW) 19,900 (5.8)

Temperature Control

Selection range °F ( °C) 100 - 140 (38 - 60)

Default temperature °F ( °C) 122 (50)

Stability °F ( °C)  2 ( 1)

Gas Requirement

Gas connection inches ¾ "

Peak load inlet gas pressure

Propane water column 8” - 13”

Natural Gas water column 3.5” - 10.5”

GPM (l/min) 7.3 (27.7)

GPM (l/min) 6.0 (22.7)

GPM (l/min) 4.4 (16.6)

GPM (l/min) 3.7 (13.9)

% > 83%

1)

Water

Hot water connection inches ¾ "

Cold water connection inches ¾ "

Minimum water flow

Minimum recommended

2)

GPM (l/min) 0.5 (1.9)

PSI (bar) 30 (2.07)
water pressure
Minimum well pressure PSI 40

Water valve material Polymer (PPS)

(Polypropylene

Sulfide)

Connections: Bottom of heater

Combustion

CO level ppm  250 (measured)

CO2 level (set from factory) % see table 36

Dimensions

Depth inches (mm) 11 ¼ (286)

Width inches (mm) 17 7/8 (452)

Height inches (mm) 30½ (775)

Weight pounds (kg) 67 (30.5)

Gas types

RTG 199 ME – 6 720 811 615 (2015/04)

Natural Gas

Table 3

7

Appliance details

Technical characteristics Units RTG 199 ME

LP Gas

Voltage

Nominal V AC 120

Frequency Hz 60

Amperage

Idle mA 40

Operation A  2.5

Noise db (A) 45 - 65

Water protection

3)

IP X4D

Table 3

1) To measure Gas Pressure, see Measuring Gas Pressure, chapter 4.14, page 32.

2) Activation varies with inlet water temperatures from 0.5 - 1.6 gallon/minute (1.9

- 6.1 l/m).

3) Protection against water drops.

If appliance is installed at elevations above 2000ft, refer
to chapter 4.3.8 Fan speed adjustment.

The RTG 199ME 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 (see page 22).

• Outdoor installation without installation of Outdoor kit.

• Applications where inlet water temperature is higher than 140 °F

(60°C). A 3-way valve or mixing valve must be installed before
the appliance if inlet water temperature exceeds this limit.

3.3.2 Remove front cover

▶ Loosen the two Phillips head screws located on bottom rear of cover.

Safety devices

• Flame failure device (ionization flame rod sensor)

• Overheat prevention (temperature limiter)

• Inlet temperature sensor

• Outlet temperature sensor

• Back flow temperature sensor

3.3 Unpacking the heater

Before installing the unit, be certain you have the correct heater for
your type of Gas - Propane or Natural Gas. Identification labels are

found on the shipping box, and on the rating plate which is located on the
right side panel of the cover.

Fig. 3 Loosen the two screws

Fig. 2 Rating plate

[A] Serial number
[B] Type of gas

3.3.1 The box includes

• Tankless water heater

• Bracket for wall hanging the heater

• Installation manual

• Energy Guide label (in the front cover)

8

RTG 199 ME – 6 720 811 615 (2015/04)

Appliance details

▶ Lift front cover panel upward and remove.

Fig. 4 Remove the front cover

3.3.3 Remove combustion cover (service only)

▶ Open the four clips and remove the combustion cover.

In Canada: The Installation must conform with CSA B149.(1,2)
INSTALLATION CODES and /or local installation codes.

• 2. Carefully plan where you install the heater. Correct combustion air

supply and vent pipe installation are very important. If not installed
correctly, fatal accidents can occur, such as carbon monoxide
poisoning or fire.

• 3. When the unit is installed indoors and ROOM SEALED (twin pipe)

it is permitted to be located in bathrooms, bedrooms and occupied
rooms that are normally kept closed. See chapter 4.3 (page 11). If
the unit will be installed indoors and use indoor combustion air, the
place where you install the heater must have enough ventilation. The

National Fuel Gas Codes do not allow UNSEALED gas fired water
heater installations in bathrooms, bedrooms or any occupied
rooms normally kept closed. See chapter 4.4 (page 24).

• 4. You must correctly vent your heater. See chapter 4.3 (page 11) on

VENTING.

• 5. The appliance and its gas connection must be leak tested before

placing the appliance in operation.
The appliance must be isolated from the gas supply piping system by
closing its individual manual gas shutoff valve (not supplied with
heater) during any pressure testing at pressures in excess of ½ Psig
(3.5 kPa).

• 6. Keep water heater area clear and free from combustibles and

flammable liquids. Do not locate the heater over any material which
might burn.

• 7. Correct gas pressure is critical for the proper operation of this

heater. Gas piping must be sized to provide the required pressure at
the maximum output of the heater, while all the other gas appliances
are in operation. Check with your local gas supplier, and see the
section on connecting the gas supply. See chapter 4.9 (page 27).

• 8. Should overheating occur or the gas supply fail to shut off, turn off

the gas supply at the manual gas shut off valve, on the gas line. Note:
manual gas shutoff valve is not supplied with the heater but must be
field installed.

• 9. Do not use this appliance if any part has been underwater.

Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and any gas
control which has been underwater.

• 10. Failure to install heater correctly may lead to unsafe operation

and void the warranty.

Fig. 5 Remove the combustion cover

3.4 General rules to follow for safe operation

• 1. You must follow these instructions when you install your heater. In
the United States: The installation must conform with local codes or,
in the absence of local codes, the National Fuel Gas Code ANSI
Z223.1/NFPA 54.

RTG 199 ME – 6 720 811 615 (2015/04)

9

Appliance details

3.5 Dimensions and minimum installation clearances

Fig. 6 Dimensions

[1] On/Off button
[2] Reset button
[3] Program key
[4] Power ON or stand-by LED
[5] LCD display
[6] Up button
[7] Down button

10

RTG 199 ME – 6 720 811 615 (2015/04)

Installation instructions

4 Installation instructions

4.1 Specialized tools

The following specialized tools may be required for installation:

• Manometer

• Multi-meter

• Combustion Gas Analyzer

4.2 Introduction

Please follow these instructions. Failure to follow instructions may
result in:

▶ Damage or injury.
▶ Improper operation.
▶Loss of warranty.

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.

Fig. 7 Side view

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

Model RTG 199ME

TOP (A) 12”

FRONT (B) 1”

BACK 0”

SIDES 1”

FLOOR (C) 12”

Table 4 Minimum clearances

Common installation practice is to first determine the
venting/combustion air point of termination, then
design the piping layout back to the heater.

4.3 Venting

NOTICE:

▶ Do not reduce the exhaust or combustion air vent

pipe sizes.

▶ Do not common vent with any other vented appliance

or stove.

DANGER: Flue gas poisoning!
▶ Failure to vent the exhaust gases to the outside with

sealed stainless steel vent pipe (AL29-4C) may
result in dangerous flue gases filling the structure in
which it is installed.

WARNING:

▶ Do not mix vent pipe or joining methods from

different manufacturers.

WARNING:

▶ Approved terminators must be used for inlet and

exhaust vent systems to prevent rain from entering
the appliance. Failure to do so may result in damage
to the appliance. This failure is not covered under the
manufacturer’s warranty.

RTG 199 ME – 6 720 811 615 (2015/04)

CAUTION:

▶ The vent system 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 will not be responsible for
improperly installed appliances.

11

Installation instructions

NOTICE:

▶ In areas where outside temperatures routinely come

close to freezing, sealed combustion operation is
required. Concentric termination or separate
terminations for combustion and vent, must be
installed on the same wall or roof surface; however,
never facing the direction of pre vailing winds. Failure
to do so may result in heat exchanger freezing and
bursting. This failure is not covered under the
manufacturer's warranty.

WARNING: Appliance malfunction!
▶ Protect the exhaust and inlet from leaves and debris

by installing a screen on the end of the termination.
¼ " mesh minimum opening recommended on
screen.

4.3.1 Vent material

Establish vent clearances that comply with the vent manufacturer's
specifications. In all cases, follow local codes. See table 5:

Item Diam. Material
Exhaust Vent 3 or 4 inches Sealed single wall stainless steel

(AL29-4C)

Fig. 9 Concentric kit vent assembly

Intake Vent PVC Sealed PVC or any other rigid pipe

Table 5 Venting Specifications

Horizontal venting systems only:

An optional stainless concentric vent/air intake termination can be used
to provide only one penetration point through the exterior wall (see fig.
8, 9 & 10). The concentric vent/air intake kit can be ordered from your
local wholesaler. Note: Only tee terminals are approved for use with the
concentric vent/air intake kit (see Table 6). Vent piping and tee terminal
used with kit must be from the same vent pipe manufacturer. The
appliance can also be installed with separate air intake and exhaust
piping (see Fig.16).

Fig. 10 Concentric kit installation

[LA] 12 inches
[LB] 3 inches stainless steel pipe

Fig. 8 Concentric kit

12

RTG 199 ME – 6 720 811 615 (2015/04)

4.3.2 Vent specifications

Install appliance as close to point of vent termination as possible. The
exhaust piping must vent directly to the outside of the structure.
Horizontal sections of vent must pitch upward towards termination ¼"
for every foot of horizontal length, to prevent the pooling of condensate,
and be supported at 4 foot intervals with overhead hangers.
Exception: horizontal run between last elbow and termination must
pitch down to termination 1/4" per foot. Note: For horizontal
terminations, venting must terminate once it penetrates to the outside of
the structure. There must be no sections of vent pipe exposed to the
outdoors other than the termination. Note: Listed thimbles or collars are
necessary where venting passes through wall and ceiling partitions. If
the vent system passes through combustible areas where the vent
clearance requirements cannot be maintained, consult local codes. The
distance to combustibles using this chase technique is 1 inch. Note:
Type-B vent must never be used as the actual exhaust vent system for
the appliance, as it is not gas tight and illegal for use with this appliance.
This will create a serious health hazard and void the warranty.

3" VENTING Z flex Protech Heat Fab

Installation instructions

Company Contact info

Z-flex www.z-flex.com

800-654-5600

ProTech Industries www.protechinfo.com

800-766-3473

Heat-Fab www.heatfab.com

800-772-0739

Table 8 Vent manufacturers

Condensate drain requirements

An external condensate drain (not supplied with the heater) must be
installed under the following conditions:

• All vertical terminating vent installations.

• Horizontal terminating vent installations where the total linear vent
length is greater than 10 feet (3.1 m) for 3" and 5 feet (1.5 m) for 4".

• Vent installations where any section of the exhaust vent pipe passes
through an unconditioned space.

3"

2SVEEWCF0390 FSELB9003 9314

90° elbow

3" Tee

2SVSTTF03 FSTT3 9390TEE

Terminal

3" Horizontal

2SVSTB03 FSTB3 N/A

Terminal

3" horiz.

2SVSHTD03 N/A N/A

terminal

with damper

3" Vertical

2SVSRCF03 FSRC3 5300CI

Terminal

Table 6 3" Terminator Part Numbers

4" VENTING Z flex Protech Heat Fab

4"

2SVEEWCF0490 FSELB9004 9414

90° elbow

4" Tee

2SVSTTF04 FSTT4 9490TEE

Terminal

4" Horizontal

2SVSTB04 FSTB4 N/A

Terminal

4" horiz.

2SVSHTD04 FSRC4 5400CI

terminal

with damper

Twin pipe termination clearances

The minimum clearance between exhaust vent and combustion air inlet
terminations for twin pipe penetration is 3 feet.

Minimum combustion air and exhaust pipe length

The minimum exhaust pipe length is 1 foot (0.3m) of straight vent pipe.
The minimum combustion air pipe length is one 90° elbow.

Maximum combustion air and exhaust pipe length

The following tables display the maximum allowable straight pipe
lengths for combustion air and exhaust piping with consideration to the
number of elbows used. Reduce the equivalent length for each elbow
used from the maximum allowable length depending on the system
used.

Venting

Maximum
allowable
total vent

Length

Maximum
allowable

Exhaust

Length

Maximum
allowable

Intake

Length

Elbow

Equivalency

90° 45°

3" 57 ft 28.5 ft 28.5 ft 5 ft 2.5 ft

4" 122.5 ft 61.25 ft 61.25 ft 5 ft 2.5 ft

Table 9 Maximum Allowable Exhaust and Combustion Air Lengths

Use of elbows

It is recommended to limit the amount of elbows used in the exhaust and
combustion air piping to reduce fricti on in the air flow. The following lists
the maximum amount of 90 ° elbows allowed in either the exhaust or
combustion air piping:

4" vertical

2SVSRCF04 N/A N/A

terminal

Table 7 4" Terminator Part Numbers

For specific questions concerning vent material, specifications, usage or
installation, please contact the vent manufacturer directly.

RTG 199 ME – 6 720 811 615 (2015/04)

Max. number of 90° elbows 3" venting 4" venting

Max number of elbows 5 7

Table 10

Two 45° elbows are equal to one 90° elbow. Any
combination of 45° and 90° elbows may be used in
the vent system as long as the combination does not
exceed the maximum listed in table 9 above.

13

Installation instructions

Calculation example for 3" venting:
Exhaust

System used Concentric

Number of 90° elbows needed: 1
Number of 45° elbows needed: 2

Table 11

Calculation of example

Max. length 28.5’
90° elbow reduction - 5’
sub-total = 23.5’
45° elbow reduction - 5’
Total = 18.5’

Table 12

For this example, the maximum allowable exhaust pipe
length is 18.5 feet.

Combustion air

System used Concentric

Number of 90° elbows needed: 2
Number of 45° elbows needed: 1

Table 13

Calculation example for 4" venting:
Exhaust

System used Twin pipe

Number of 90° elbows needed: 2
Number of 45° elbows needed: 2

Table 15

Calculation of example

Max. length 61.25’
90° elbow reduction - 10’
sub-total = 51.25’
45° elbow reduction - 5’
Total = 46.25’

Table 16

For this example, the maximum allowable exhaust pipe
length is 46.25 feet.

Combustion air

System used Twin pipe

Number of 90° elbows needed: 1
Number of 45° elbows needed: 2

Table 17

Calculation of example

Max. length 28.5’
90° elbow reduction - 10’
sub-total = 18.5’
45° elbow reduction - 2.5’
Total = 16’

Table 14

For this example, the maximum allowable combustion
air pipe length is 16 feet.

Calculation of example

Max. length 61.25’
90° elbow reduction - 5’
sub-total = 56.25’
45° elbow reduction - 5’
Total = 51.25’

Table 18

For this example, the maximum allowable combustion
air pipe length is 51.25 feet.

14

RTG 199 ME – 6 720 811 615 (2015/04)

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

Installation instructions

Fig. 11

Canadian installations

1)

U.S. installations

2)

A Clearance above grade, veranda, porch, deck or balcony 12 in. 12 in.

B Clearance to window or door that may be opened 36 in. 12 in.

C Clearance to permanently closed window * *

D Vertical clearance to ventilated soffit located above the vent

**
termination within a horizontal distance of 2 feet (61cm) from
the center line of the termination

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. within a height 15 feet above

meter/ regulator assembly

*

I Clearance to service regulator vent outlet 36 in. *

J Clearance to non-mechanical air supply inlet to building or the

36 in. 12 in.
combustion air inlet to any other application

K Clearance to mechanical air supply inlet 72 in. 36 in. above if within 10 feet

horizontally

L Clearance above paved sidewalk or paved driveway located on

84 in.

3)

*

public property

M Clearance under veranda, porch deck or balcony 12 in.

4)

*

Table 19

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 section 2.20, or;

RTG 199 ME – 6 720 811 615 (2015/04)

b) A reference to the following footnote:
“Clearance in accordance with local installation codes and the
requirements of the gas supplier.”

15

Installation instructions

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

Fig. 12

Canadian installations

1)

U.S. installations

2)

A Clearance above grade, veranda, porch, deck or balcony 12 in. 12 in.

B Clearance to window or door that may be opened 36 in. 4 feet below or to side of opening;

1 foot above opening

C Clearance to permanently closed window * *

D Vertical clearance to ventilated soffit located above the vent

**
termination within a horizontal distance of 2 feet (61cm) from the
center line of the termination

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. within a height 15 feet above

meter/ regulator assembly

*

I Clearance to service regulator vent outlet 36 in. *

J Clearance to non-mechanical air supply inlet to building or the

combustion air inlet to any other application

36 in. 4 feet below or to side of opening;

1 foot above opening

K Clearance to mechanical air supply inlet 72 in. 36 in. above if within 10 feet

horizontally

L Clearance above paved sidewalk or paved driveway located on

84 in.

3)

84 in.

public property

M Clearance under veranda, porch deck or balcony 12 in.

4)

*

Table 20

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 section 2.20, or;
b) A reference to the following footnote:
“Clearance in accordance with local installation codes and the requirements of the gas supplier.”

16

RTG 199 ME – 6 720 811 615 (2015/04)

4.3.3 Vent configuration examples

Below are approved examples of vertical and horizontal venting
installations.

Fig. 13 Horizontal side wall venting installation (single pipe

penetration)

[1] Termination
[2] Minimum above ground or normally expected snow accumulation

level
[3] Appliance
[4] Drain tee
[5] Elbow (note: minimum 1ft of straight vent pipe required)
[6] Horizontal run ¼ " per foot down to termination
[7] Hanger strap

Installation instructions

Fig. 15 Horizontal venting system (concentric vent)

Fig. 14 Horizontal venting installation (combustion air piping not

shown)

[1] Termination
[2] Minimum above ground or normally expected snow accumulation

level
[3] Appliance
[4] Elbow (note: minimum 1ft of straight vent pipe required)
[5] Horizontal run ¼ " per foot down to termination

WARNING:

▶ Single pipe penetration should be used in non-

freezing climates only!

RTG 199 ME – 6 720 811 615 (2015/04)

Fig. 16 Horizontal parallel venting system (twin pipe direct vent)

[A] 3 ft minimum
[B]  26 ft with 3" venting

 60 ft with 4" venting

Below are approved examples of vertical venting installations.
Important:

Note: Pitch horizontal runs down toward the heater, ¼ " per foot.

17

Installation instructions

Fig. 17

[1] Appliance
[2] Condensate drain
[3] Elbow
[4] Hose clamp
[5] Firestop support
[6] Firestop support
[7] Rain cap
[8] Storm collar
[9] Flashing
[10] 4" minimum air space

WARNING:

▶ Single pipe penetration should be used in non-

freezing climates only!

Fig. 18

[LA] 3ft minimum

18

RTG 199 ME – 6 720 811 615 (2015/04)

Installation instructions

Fig. 20 Exhaust connection

▶ Attach the combustion air inlet accessory to the top of the unit fig. 21

(position 2) using the 3 screws and gasket provided, and install 3" air
intake pipe over the accessory.

Fig. 19

[1] Appliance
[2] Condensate drain
[3] Elbow
[4] Hose clamp
[5] Hanger strap
[6] Horizontal run ¼ " rise/ft
[7] May be insulated if necessary
[8] Chimney
[9] Rain cap
[10] Storm collar
[11] Flashing
[12] Silicone seal

4.3.4 Vent connections

Attaching the exhaust and air inlet connection adaptors to the top of the heater

▶ Attach the flue gas exhaust accessory to the top of the unit fig. 20

(position 1) using the 4 screws and gasket provided, and fully insert
vent pipe into the accessory.

Note: Adhesive backing needs to be removed prior to
installation.

▶ If using 4" venting, a 3" to 4" increaser should be installed directly

after this accessory.

Fig. 21 Inlet connection

4.3.5 Connecting the external condensate water drain

RTG 199 ME – 6 720 811 615 (2015/04)

19

Installation instructions

6720608542-07.1V

6720608542-08.1V

Use materials approved by the authority having
jurisdiction. In the absence of other authority, PVC, and
CPVC pipe must comply with ASTM D1785, F441
orD2665. Cement and primer must comply with ASTM
D2564 or F493. For Canada, use CSA or ULC certified
PVC or CPVC pipe, fittings and cement, see table 5.

If an external condensate drain (installer supplied) must be installed
(chapter 4.3.2), the following is recommended:

• 1. Install condensate drain on a horizontal section of the exhaust pipe
as close to the heater as possible.

• 2. The condensate must be disposed of according to local codes.

• 3. To install condensate drain in vent system, use stainless steel
condensate drain tee. Refer to table 21 for approved condensate
drain parts numbers.

4.3.6 Freeze prevention

In cold climates, components of a tankless water heater can freeze and
burst from negative draft. A leading cause of negative draft is
combustion appliances in the building not being supplied with sufficient
combustion air. A wood stove or furnace c an pull its combustion air from
the water heater‘s vent pipe, allowing the cold incoming air to freeze the
cold water in the heat exchanger. Supplying more combustion air for all
combustion appliances is the solution. A HVAC specialist should be
consulted to design solutions for providing more combustion air.

Listed below is an additional measure designed to further limit backdraft
in extreme conditions assuming all other possible causes have been
addressed.

Solution One

The Z-flex vent termination hood is the preferred option for limiting
backdraft under the following conditions (see fig. 23):

• The vent hood is only to be used in the exhaust vent piping.

• The vent hood can only be used for horizontal terminations.

• The vent hood i s able to meet t he required clearances outlined in the
venting section of the water heater‘s installation manual.

Fig. 22 External condensate drain installation (combustion air piping

not shown)

[1] Appliance
[2] Condensate drain trap
[3] Elbow
[4] Firestop support
[5] Rain cap
[6] Storm collar
[7] Flashing
[8] 4" minimum air space
[9] Condensate drain Tee

3" Venting Z-flex ProTech Heat Fab

90°

2SVEVWCF03 FST3 & FSDF3 93PPLSTEE
Condensate
Drain Tee

Horizontal

2SVEDWCF03 FSHDT3 9321
Condensate
Drain

Condensate

2SVEDTK24 N/A 7000TUBE

Drain Tube

Table 21 Approved Condensate Drain Part Numbers

Fig. 23 Part nr. 2SVSHTD03 for 3" venting

Part nr. 2SVSHTD04 for 4" venting

Solution Two

If the required clearances of the Zflex termination hood cannot be met,
the Zflex damper is the preferred alternative (see fig. 24).

Fig. 24 Part nr. 2ZVBP03 for 3" venting

Part nr. 2ZVBP04 for 4" venting

Installation

For this solution to be effective, the internal flapper must be 100%
closed when the water heater is not running. Refer to Figures 25 and 26
for preferred installation positions in the vent system.

If using the Zflex damper:

• Ensure directional arrow on damp er 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.

• To allow accessibility, damper must not be installed in an enclosed
section of vent pipe.

20

RTG 199 ME – 6 720 811 615 (2015/04)

Installation instructions

• Do not install 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

Fig. 25 Combustion air piping not shown for clarity purposes

[1] Good
[2] Better
[3] Best

4.3.7 Venting for manufactured (mobile) homes

When this appliance is installed in a mobile home, it is required that the
venting be installed such that all combustion air is provided from outside
the structure. As such, single pipe venting installations are forbidden in
mobile home installations. Appropriate flue gas venting parts are listed
in the table22:

Fig. 26 Combustion air piping not shown for clarity purposes

[1] Good
[2] Better
[3] Best
[4] Enclosed vent pipe (Do not install damper)
[5] Unconditioned space (Do not install damper)
[6] Preferred damper position for vertical terminations

RTG 199 ME – 6 720 811 615 (2015/04)

21

Installation instructions

4.3.8 Fan speed adjustment

NOTICE: IMPORTANT INFORMATION!

▶ Natural gas heaters with installation altitudes below

2,000 ft above sea level disregard this section.

Installation adjustment:

After installing the tankless water heater, the fan speed values for
minimum power (P2) and maximum power (P1) may need adjustment
due to variations in altitude and vent pipe length. Failure to make

Altitude (above sea
level)

0 - 2000 ft

Total equivalent

vent length

1)

Minimum power

fan speed (P2)

3.5 - 32 ft 7 No

(0 - 610 m)

33 - 57 ft 8

2000 - 4500 ft

3.5 - 32 ft 8* 54* 47*

(610 - 1372 m)

33 - 57 ft 8* 55* 48*

4500 - 8000 ft

3.5 - 32 ft 9* 55* 48*

(1372 - 2439 m)

33 - 57 ft 9* 55* 49*

necessary adjustments to fan speed values may result in improper
operation of the appliance.

First calculate the total equivalent vent length. This is the straight pipe
length of both exhaust and combustion air plus the number of elbows
used. To determine the length equivalency of each elbow refer to table 9.
Use the equivalent vent length value to determine the appropriate fan
speed values found in table 23 and 24. Refer to page 23 on how to adjust
the fan speeds if an adjustment is necessary. After changing fan speed
values, proceed to chapter 7.4 to confirm CO

values are within

2

specified ranges.

Natural Gas Liquid propane

Maximum power fan

speed (P1)

modification required

Maximum power fan

speed (P1)

No

modification required

For operation at elevations

above 2,000 ft (610 m) the

equipment ratings shall be

reduced at the rate of 4% for

each 1,000 ft (305 m) above

sea level

* Above 2000 ft, CO2 levels must be checked with a combustion gas analyzer, see section7.4 for instructions.

Table 23 Fan speed adjustment for 3" piping

1) Full equivalent length (inlet + outlet piping + fittings)

Natural Gas Liquid propane

Altitude (above sea
level)

0 - 2000 ft
(0 - 610 m)

Total equivalent

vent length

1)

Minimum power

fan speed (P2)

Maximum power fan

2.25 - 59 ft 7 No
modification required

speed (P1)

Maximum power fan

speed (P1)

No

modification required

60 - 122.5 ft 8

2000 - 4500 ft

2.25 - 59 ft 8* 54* 47*

(610 - 1372 m)

60 - 122.5 ft 8* 55* 48*

4500 - 8000 ft

2.25 - 59 ft 9* 55* 48*

(1372 - 2439 m)

60 - 122.5 ft 9* 55* 49*

* Above 2000 ft, CO2 levels must be checked with a combustion gas analyzer, see section7.4 for instructions.

Table 24 Fan speed adjustment for 4" piping

1) Full equivalent length (inlet + outlet piping + fittings)

For operation at elevations

above 2,000 ft (610 m) the

equipment ratings shall be

reduced at the rate of 4% for

each 1,000 ft (305 m) above

sea level

22

RTG 199 ME – 6 720 811 615 (2015/04)

Installation instructions

+

P

P

+

P

+

P

P

+

P

Adjusting minimum power fan speed (P2)

To select fan speed:
▶Press ON/OFF button into ON.
▶ Immediately following, press and hold simultaneously buttons

or and for 3 seconds, until display reads P2.

Fig. 27

▶ Press to enter P2 adjustment. The current setting will appear on

the display (factory default).

▶ Press or to choose the fan speed suitable with your

installation, see table 23 and table 24.

▶ Press and hold ( 5 sec.) “Program” button until the display

flashes, then the selected value is memorized.

Proceed directly to chapter 7.4 to confirm CO2 values
are within range.

Adjusting maximum power fan speed (P1)

To select fan speed:

▶ Press ON/OFF button into ON.
▶ Immediately following, press and hold simultaneously buttons

or and for 3 seconds, until display reads P2.

Fig. 28

▶ Press the minus button to display P1.
▶ Press “Program” button to enter P1 adjustment. The current

setting will appear on the display.

▶ Press or to choose the fan speed suitable with your

installation, see table23 and table 24.

▶ Press and hold ( 5 sec.) “Program” button until the display

flashes, then the selected value is memorized.

Proceed directly to chapter 7.4 to confirm CO2 values
are within range.

Attention residents of the Commonwealth of Massachusetts:

In the Commonwealth of Massachusetts the following regulation went
into effect on 12/30/2005:
(a)For all side wall horizontally vented gas fueled equipment installed in
every dwelling, building or structure used in whole or in part for
residential purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust vent termination is less
than seven (7) feet above finished grade in the area of the venting,
including but not limited to decks and porches, the following
requirements shall be satisfied:

1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of
installation of the side wall horizontal vented gas fueled equipment, the
installing plumber or gas fitter shall observe that a hard wired carbon
monoxide detector with an alarm and battery back-up is installed on the
floor level where the gas equipment is to be installed. In addition, the
installing plumber or gas fitter shall observe that a battery operated or
hard wired carbon monoxide detector with an alarm is installed on each
additional level of the dwelling, building or structure served by the side
wall horizontal vented gas fueled equipment. It shall be the
responsibility of the property owner to secure the services of qualified
licensed professionals for the installation of hard wired carbon
monoxide detectors.
a.In the event that the side wall horizontally vented gas fueled equipment
is installed in a crawl space or an attic, the hard wired carbon monoxide
detector with alarm and battery back-up may be installed on the next
adjacent floor level.
b. In the event that the requirements of this subdivision can not be met
at the time of completion of installation, the owner shall have a period of
thirty (30) days to comply with the above requirements; provided,
however, that during said thirty (30) day period, a battery operated
carbon monoxide detector with an alarm shall be installed.

2.APPROVED CARBON MONOXIDE DETECTORS. Each carbon
monoxide detector as required in accordance with the above provisions
shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS
certified.

3. SIGNAGE. A metal or plastic identification plate shall be permanently
mounted to the exterior of the building at a minimum height of eight (8)
feet above grade directly in line with the exhaust vent terminal for the
horizontally vented gas fueled heating appliance or equipment. The sign
shall read, in print size no less than one half (1/2) inch in size, "GAS
VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".

4. INSPECTION. The state or local gas inspector of the side wall
horizontally vented gas fueled equipment shall not approve the
installation unless, upon inspection, the inspector observes carbon
monoxide detectors and signage installed in accordance with the
provisions of 248 CMR 5.08(2)(a)1 through 4.(b)
EXEMPTIONS: The following equipment is exempt from 248 CMR

5.08(2)(a)1 through 4:

1. The equipment listed in Chapter 10 entitled "Equipment Not Required
To Be Vented" in the most current edition of NFPA 54 as adopted by the
Board; and

2. Product approved side wall horizontally vented gas fueled equipment
installed in a room or structure separate from the dwelling, building or
structure used in whole or in part for residential purposes.
(c) MANUFACTURERS REQUIREMENTS - GAS EQUIPMENT VENTING
SYSTEM REQUIRED. When the manufacturer of Product Approved side
wall horizontally mounted gas equipment provides a venting system
design or venting system components with the equipment, the
instructions provided by the manufacturer for the installation of the
equipment and the venting shall include:

1. Detailed instructions for the installation of the venting system or the
venting system components: and

2. A complete parts list for the venting system design or venting system.
(d)MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING
SYSTEM NOT PROVIDED. When the manufacturer of a product approved
side wall horizontally vente d gas fueled equipment does not provide the
parts for the venting of flue gases, but identifies "special venting
systems," the following requirements shall be satisfied by the
manufacturer:

RTG 199 ME – 6 720 811 615 (2015/04)

23

Installation instructions

1. The referenced "special venting system" instructions shall be included
with the appliance or equipment installation instructions; and

2. The "special venting systems" shall be product approved by the
Board, and the instructions for that system shall include a parts list and
detailed installation instructions.
(e) A copy of all installation instructions for all products approved side
wall horizontally vented gas fueled equipment, all venting instructions,
all parts lists for venting instructions, and/or all venting design
instructions shall remain with the appliance or equipment at the
completion of the installation.

4.4 Combustion air requirements

CAUTION:

▶ In areas where outside temperatures routinely come

close to freezing, sealed combustion operation is
required. Use a concentric termination or separate
terminations for combustion and vent, which must
be installed on the same wall or roof surface,
however never facing the direction of prevailing
winds. Failure to do so may result in heat exchanger
freezing up and bursting. This failure is not covered
under the manufacturer's warranty.

CAUTION:

▶ When installed in an environment where corrosive

chemicals or dirty air (e.g. hair salons, car washes)
are present the twin pipe system is required.

Twin pipe and Concentric pipe

The water heater is designed as a sealed combustion appliance. It is
recommended that the combustion air be provided by a dedicated 3” or
4” pipe from the outside (twin pipe) or by connecting to the Concentric
vent kit (see Fig.8, 9 & 10). The combustion air pipe may be PVC or any
other rigid sealed 3" or 4" pipe. The combustion air piping must pitch
down 1/4 inch per foot towards termination to prevent rain water from
entering the appliance. In twin pipe penetrations, the combustion air
inlet, whether terminating vertically or horizontally, must be located in
such a manner as to provide a minimum 3 foot clearance from the
exhaust vent termination. See Fig.11 and 12 Letter I, page 15.
For the maximum length of the combustion air pipe, see Table 9.

CAUTION:

▶ Terminations must prevent rain and debris from

entering the combustion air and exhaust vent piping.

Single pipe

WARNING:

▶ Single pipe venting is forbidden in manufactured

(mobile) home installations.

This Installation Manual specifies the minimum vertical vent pipe and the
amount of combustion air required for this unit. When all requirements
are followed, the unit will operate properly and safely. However, there
may still be a risk of freezing due to negative draft if the other
combustion appliances in the building are not supplied with sufficient
combustion air. A wood stove or furnace c an pull its combustion air from
the heater's vent pipe, allowing the cold incoming air to freeze the cold
water in the heat exchanger. Supplying more combustion air for all
combustion appliances is the solution. A HVAC specialist should be
consulted to design solutions for providing more combustion air.
Observe the following guidelines:

Installations in structures that have been tightly constructed (air
infiltration rate of 0.40 ACH or less) must be provided with combustion
air per the National Fuel Gas Code. Consult a HVAC specialist if your air
infiltration rate is questionable.

The space must have two permanent openings, one commencing within
12 inches of the top and one commencing within 12 inches of the
bottom of the enclosure.

• 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) for the
water heater alone.

– 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

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 metal louvers (as metal will
reduce the free air by 30%). Refer to the National Fuel Gas Code for
complete information. In buildings of tight construction all air should be
taken from outside.

Note: This appliance requires 9950 cubic feet of available
combustion air, or a minimum of 1243 square feet of space with an
8 foot ceiling to operate. If the large amount of air space, which
equates to about half of most average sized homes, is not available,
the appliance must pull air from the outside (see twin pipe above).

Although it is permissible to draw combustion air from inside the
structure, it is not the manufacturer’s recommended installation
method. Always install a 3 inch elbow on the top of the combustion air
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 space. Always follow local
codes if they are more stringent.

24

4.5 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 a proper exhaust vent system.
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. Centrally locating the water heater is recommended to keep
hot water distribution times even throughout the structure.

RTG 199 ME – 6 720 811 615 (2015/04)

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 power outage in conjunction with
freezing temperatures, it is recommended that the
heater be drained.
See chapter 7.2, page 37 “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.

4.6 Heater placement and clearances

The water heater design is approved for installation on a combustible
wall (see chapter 4.7 Mounting installation) 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 10.

4.7 Hanging appliance on the wall

Installation instructions

Fig. 29 Distance between support boards

[1] Studs 16" (406mm) on center

WARNING: Severe personal injury and property
damage!

Before mounting appliance:

▶ Check that there are no loose or damaged parts

inside the appliance.

▶ Confirm that the gas type of the heater matches the

gas supply you will be connecting the heater, see
Fig.2, page 8.

Front cover should be removed (see instruction s on page

8) in order to inspect components visually.

WARNING:

▶ Do not install this appliance on a carpeted wall. The

heater must be mounted on a wall using appropriate
anchoring materials.

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, a minimum 2" air gap or
rigid insulation between the heater back and the wall
is recommended.

Fig. 30 Leveling wall mounting bracket

If 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. 29, page 25.

▶ 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.
30, page 25.

▶ Hang the appliance on the bracket, see fig. 31, page 26.

RTG 199 ME – 6 720 811 615 (2015/04)

25

Installation instructions

Fig. 31 Mounting the heater

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

4.8 Mounting installation

When installing this appliance the unit must be additionally secured at
the bottom of the water heater as shown in fig. 32. Use the included
screws to secure the brackets at the bottom of the water heater to the
wall. If the wall is sheathed with plaster or drywall, it is recommended
that a support board be first attached across a pair of studs at the
bottom of the unit as shown in fig. 29.

Fig. 32 Mounting the heater

26

RTG 199 ME – 6 720 811 615 (2015/04)

Installation instructions

4.9 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. Example rating plate can be found in fig. 2, page 8.
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.

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. 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.
▶ The minimum internal diameter required for any appliance connector

is ¾ ”, see chapter 4.9.1 for more details on pipe sizing.
▶ 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. 2.

GAS LINE SIZING

The gas supply piping for a single heater should be sized for a maximum
draw of 199,000 BTU/hr. Measure the length of gas supply line from the
building's gas main to the heater and use the chapter 4.9.1 and 4.9.2,
page 28 or the gas line manufacturer’s sizing tables to determine the
pipe diameter necessary. If there are more gas drawing appliances on
the line, size the gas line according to the total maximum amount of BTU
draw input rating of for all appliances combined.

Note: Undersizing the gas line may result in diminished hot water flow
rate and temperature. See chapter 4.14, page 32 for the procedure to
measure gas pressure. Proper gas pressure must be confirmed at time of
installation.

Fig. 33 Gas connection

[1] Gas supply
[2] Cap
[LA] Minimum 3"

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.

RTG 199 ME – 6 720 811 615 (2015/04)

27

Installation instructions

4.9.1 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.

Specified pipe lengths are for one RTG 199ME, which has a maximum input rating of 199,000 BTUs. 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 14" W.C. (0.5 psig) or less and a pressure drop of 0.3” W.C.
(0.75mbar) based on 0.60 specific gravity gas).

Nominal
Iron Pipe
Size, inches

Internal

Diameter

inches

Length of Black iron Pipe (Schedule 40 Metallic Pipe), Feet

10 20 30 40 50 60 70 80 90 100

3/4 0.824 273 188 151 129 114 104 95 89 83 79
1 1.049 514 353 284 243 215 195 179 167 157 148
1-1/4 1.380 1060 726 583 499 442 400 368 343 322 304
1-1/2 1.610 1580 1090 873 747 662 600 552 514 482 455

Table 25

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).

Nominal Iron
Pipe Size,
inches

Internal

Diameter

inches

10 20 30 40 50 60 70 80 90 100

Minimum Gas Pressure 8.0" WC (20 mbar)

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

1/2 0.622 454 312 250 214 190 172 158 147 138 131
3/4 0.824 949 652 524 448 397 360 331 308 289 273
1 1.049 1787 1228 986 844 748 678 624 580 544 514

Table 26

Maximum pipe capacity in cubic feet of Natural Gas per hour for gas
pressures of 14" W.C. (0.5 psig or 25 mbar) or less and a pressure drop
of 0.5” W.C. (1.25mbar) based on 0.60 specific gravity gas).

Tube

Length of Corrugated Stainless Steel Tubing (CSST), Feet

size,
inches

EHD*

10 20 30 40 50 60 70 80 90 100

1 30 330 231 188 162 144 131 121 113 107 101

1 31 383 269 218 188 168 153 141 132 125 118

1 - 1/4 37 639 456 374 325 292 267 248 232 219 208

1 - 1/4 38 746 526 442 386 347 318 295 277 262 249

Table 27

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

28

RTG 199 ME – 6 720 811 615 (2015/04)

Installation instructions

4.9.2 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 of is for pipe sizing between the
2nd stage (low pressure) regulator and the appliance. For details see the current NFPA 54 or NFPA 58.

Specified pipe lengths are for one RTG 199ME which has a maximum input of 199,000. 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).

Length of Black iron Pipe, Feet
Nominal Iron
Pipe inches

Internal

Diameter

inches

10 20 30 40 50 60 80 100

1/2 0.622 291 200 160 137 122 110 101 94

3/4 0.824 608 418 336 287 255 231 212 197

1 1.049 1150 787 632 541 480 434 400 372

Table 28

Length of Corrugated Stainless Steel Tubing (CSST), Feet
Tube size,
inches

EHD* 10 20 30 40 50 60 70 80 90 100

3/4 23 254 183 151 131 118 107 99 94 90 85

3/4 23 303 216 177 153 137 126 117 109 102 98

1 30 521 365 297 256 227 207 191 178 169 159

1 31 605 425 344 297 265 241 222 208 197 186

Table 29

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

Nominal Iron
Pipe inches

Internal Diameter

inches

10 20 30 40 50

Length of Semirigid (soft) Copper ACR Tubing, Feet

5/8 0.527 188 129 104 89 79

3/4 0.652 329 226 182 155 138

Table 30

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

4.10 Water connections

NOTICE:

▶ This heater is not approved for preheated water

applications exceeding 140°F (60 °C).

NOTICE:

▶ In applications where inlet water temperature can

exceed 140°F (60°C), 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.

▶ When facing the heater, the ¾ ” cold connection is on the bottom

right and the hot connection is on the bottom left. Centrally locating
the water heater is recommended to keep hot water distribution
times even throughout the structure.

Inch Water Column)* Source National Fuel Gas Code NFPA 54, ANSI
Z223.1 - No Additional Allowance is necessary for an ordinary number of
fittings.

Fig. 34

[1] Cold connection
[2] Hot connection

RTG 199 ME – 6 720 811 615 (2015/04)

29

Installation instructions

Fig. 35 Water filter

[1] Water filter

▶ The use of unions when connecting both water pipes to the inlet and

outlet connections is required. This will facilitate any necessary
servicing.

▶ Plastic or PEX type plumbing line materials are not suitable for

connecting directly to the water heater.

▶ Never sweat any piping directly to or beneath the water connections,

as damage will occur to the internal water valve from heating of the
pipe.

▶ Keep water inlet and outlet pipes to no less than ¾" (19.05mm)

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. 36).

▶ For installation on a private well system with the use of a pressure

tank, the lowest pressure range setting recommended is 40-60 psi
(2.75 - 4.15bar).

4.11 Water quality

Water quality can have an impact on appliance longevity and may void
the manufacturer's warranty.
For water analysis data call your local water department, or if on a well,
have well water analyzed periodically. If water quality exceeds one or
more of the values specified below, consulting a local water treatment
professional for water softening/conditioning options is recommended.

Connecting the pressure relief valve (PRV)

A listed pressure relief valve 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.
The location of the PRV must be readily accessible for servicing or
replacement, and be mounted as close to the water heater as possible.
See fig. 36. To install the PRV, a suitable fitting connected to an
extension on a “T” fitting can be sweated to the hot water line.
Support all piping.

Fig. 36 Plumbing Connections (with shutoff valves) and Pressure Relief

Valve

4.12 Domestic hot water recirculation

Although recirculation directly through the tankless water heater is
allowed, temperature stability is improved by recirculating through a
tank as shown in fig. 37. By using the design in fig. 37, there is no
recirculation of hot water through the tankless water heater and
therefore, does not affect the heat exchanger warranty. Direct
recirculation through the tankless water heater is permissibl e, however,
the heat exchanger warranty is reduced; contact manufacturer for
further installation requirements. The following drawing is provided to
outline one possible recirculation design using the water heater in
conjunction with an electric storage tank. 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.

Description Max. Levels

pH pH 6.5 - 8.5

TDS (total Dissolved Solids) mg/l or ppm 500

Total hardness mg/l or ppm 100 (6 grains)

Aluminum mg/l or ppm 2.0

Chlorides mg/l or ppm 250

Copper mg/l or ppm 1.0

Iron mg/l or ppm 0.3

Manganese mg/l or ppm 0.05

Zinc mg/l or ppm 5.0

Table 31

30

RTG 199 ME – 6 720 811 615 (2015/04)

Fig. 37 Recirculation application

[1] Full port isolation valve
[2] Circulator pump on timer
[3] Check valve
[4] PRV
[5] Expansion tank
[6] Tankless water heater - RTG 199ME
[7] Electric storage tank

The use of a small electric tank after heater (4-6 gallon size) should be
used for this application and designed so the pump will circulate the
water through the tank and the building's hot water return loop only.
Timed or thermostatically controlled operati on of the pump is commonly
done. Contact manufacturer if further information is needed.

4.13 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.

Installation instructions

CAUTION:

▶ Propylene glycol may be used for freeze prevention

ONLY on the space heating side of the heat
exchanger. Do not use ethylene glycol (automotive
antifreeze).

CAUTION:

▶ The use of a flow switch is recommended to ensure

DHW priority and to prevent “cold-blow” situations
when the tankless water heater is used with an air­handling system. 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. 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. 38. 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). Applications of combination DHW and
space heating in an open loop configuration is acceptable if plumbed
similar to fig. 39. Use of this tankless water heater in a combination DHW
and space heating application will result in the product warranty being
reduced to 3 years.

Fig. 38 Pressure drop curve

RTG 199 ME – 6 720 811 615 (2015/04)

31

Installation instructions

+

P

P

+

+

Fig. 39 Space heating diagram

[1] Hot water outlet
[2] Cold water inlet
[3] Pressure relief valve
[4] Gas supply
[5] Shut off gas valve
[6] Thermal expansion tank (as required)
[7] Atmospheric vacuum breaker
[8] Cold inlet
[9] Check valve
[10] Pump
[11] Thermostatic mixing valve
[12] Thermometer (optional)
[13] DHW outlet
[14] Water to water heat exchanger
[17] Thermostat
[18] Space heating zone
[19] Zone controller
[20] Space heating pump
[21] Expansion tank
[22] Pressure relief valve

4.14 Measuring gas pressure

Confirm gas pressure upon installation.

Connecting manometer

▶ Shut off gas supply at installer supplied shutoff valve for this water

heater.

▶ Remove front cover and locate inlet gas pressure test port (see

Fig.41).

▶ Loosen screw inside left test point fitting (do not remove) and

connect manometer tube to test point.

Static Pressure Test

▶ Turn gas supply back on.
▶ Record static gas pressure reading in table 33.

Operating Pressure Test

▶ Press ON/OFF button into ON.
▶ Immediately following, press and hold simultaneously buttons

or and for 3 seconds, until display reads P2.

Fig. 40

▶ Press to enter P2 adjustment. The current setting will appear on

the display (factory default).

▶ Press or until P1 appears.

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 NG LPG

pin 3.5” WC 8” WC

Table 32 Minimum inlet gas pressure under full operation

▶ Operate all other gas appliances (except heater) on same gas piping

system at maximum output.

▶ Turn on high volume of hot water flow (at least 6 gpm) (1tub and 2

sinks should be sufficient) and burner will light. If heater display
reverts to P2, open more hot water fixtures to allow sufficient flow.
Press until P1 reappears on the display.

32

RTG 199 ME – 6 720 811 615 (2015/04)

▶ Record lowest operating gas pressure reading in table 33.

6720608920-16.1AL

Gas pressures lower than 3.5" W.C. for Natural Gas or 8" W.C. for LPG
will result in insufficient degree rise to the hot water being used, reduced
hot water volume, possible error code faults and must be corrected. See
Gas Connections, chapter 4.9, page 27.

P1 fan speed:
Factory default: NG: 54, LP: 46
Lowering P1 fan speed reduces the maximum BTU input.
As a temporary measure if the gas pressure in P1 is below specification,
lower P1 fan speed incrementally until minimum inlet gas pressure
reaches specified range (table 32). After upgrading gas line, reset
appliance to P1 factory default setting (NG: 54, LP: 46) or setting from
Section 4.3.8.

Electrical connections

Fig. 41 Gas pressure test port (left tapping)

Static Gas Pressure Reading (see chapter 4.14)

enter here: ___________________ Date: ___________

Operating Gas Pressure Reading (see chapter 4.14)

enter here: ___________________ Date: ___________

5 Electrical connections

5.1 Electrical power supply

WARNING:

▶ For safety reasons, disconnect the power supply

cord to the heater before any service or testing is
performed.

WARNING:

▶ This 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.

The water heater requires an electrical power supply from a 120VAC /
60Hz properly rated receptacle and must be properly grounded.
The heater is wired as shown in the wiring diagram (chapter 10, Fig.66).

Table 33

Note: The outlet the appliance is plugged into should be clear from
possible water damage.

5.2 Position of the fuses in control unit

To check fuses, proceed as follows:

▶ Remove the front cover, see fig. 4, page 9.
▶ Remove the three screws from the control unit.

Fig. 43

▶ Remove the six screws from the back cover of the control unit, see

fig. 44, pos. 2.

Fig. 42 Connecting power supply cord

[1] Power cord length: 3ft.

RTG 199 ME – 6 720 811 615 (2015/04)

33

Operation instructions

2

3

1

5

4

6
7

6720608920-10.1AL

▶ Check the fuses in the printed circuit board, see fig. 44, pos. 3.

Fig. 44 Fuses position

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

6 Operation instructions

Fig. 45

[1] On/Off button
[2] Reset button
[3] Program Key
[4] LCD display
[5] Up button
[6] Down button
[7] Power On or stand-by LED

6.1 Description LCD Display

WARNING:

▶ Do not use any cleaning aggressive or corrosive

agents to clean the window.

Fig. 46 Power bar indicator (input)

34

Fig. 47 Temperature indicator

RTG 199 ME – 6 720 811 615 (2015/04)

Fig. 48 Error indicator

6720608920-11.1AL

+

6720608920-12.1AL

Fig. 49 Locked condition indicator (only with remote control)

Operation instructions

WHAT TO DO 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.

B. Use only your hand to press the on/off control switch. Never use tools.
If control switch is jammed, close the gas supply and call a qualified
service technician. 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.

6.3 Power

On

▶ To start the appliance press the On/Off button.

Fig. 50 Flame indicator

Fig. 51 Solar mode indicator (see chapter 6.4, page 35)

Fig. 52 Remote control indicator

6.2 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.

A. This appliance is equipped with electronic ignition for lighting the
main burner. When turning the heater on, follow these instructions
exactly.

Fig. 53

Off

▶ To shut down the appliance press the On/Off button again.

6.4 Temperature selection

To select hot water temperature:

▶ Press buttons or in order to reach desired temperature.

Fig. 54

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.

Note: The water heater, running at minimum BTU, may still achieve
temperatures above the desired set temperature. Low flowing fixtures
are the leading cause of this type of temperature overshoot. To combat

RTG 199 ME – 6 720 811 615 (2015/04)

35

Operation instructions

6720608920-14.1AL

6720608920-15.1AL

+

this symptom, clean fixtures or replace with higher flowing ones if
necessary.

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 or with the remote

control. 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).

The water heater will not ignite if inlet water temperature exceeds the set
point temperature less 9 °F (5 °C). In this condition, the solar mode
indicator will show on the LCD display. See fig. 51, page 35.

Solar mode activation formula Example:

Temp. inlet > Temp. set - 9 °F
(5 °C)

104 °F (40 °C) > 112 °F (44 °C) -

9 °F (5 °C)

Table 34

WARNING: Appliance damage!
▶ In applications where inlet water temperature can

exceed 140 °F (60°C), a thermostatic or mixing valve
must be installed before the appliance to prevent
water exceeding 140°F (60°C) from entering the
appliance.

▶ LCD flashes until selected temperature is reached.
▶ Power bar indicates power percentage in use.

6.6 Reset button

If the LCD shows the error symbol do not shut off power or unplug
the heater. Follow instructions below to reset error first.
Record the error code on LCD and consult “Problem solving” chapter

9.1, page 44.

Fig. 57

After following instructions indicated in “Troubleshooting” section,

▶ press reset button firmly in order to return heater to normal

operation.

Fig. 55

6.5 Operation

▶ When a hot water tap is opened, main burner ignites and LCD

displays indication .

Fig. 58 Reset button

If the problem persists, contact your installer.

6.7 Program button

Fig. 59 “Program” key

6.7.1 Memorizing selected temperature

▶ Press buttons or to select desired temperature.
▶ Hold “Program” button for 3 seconds to save temperature.

When LCD stops blinking, temperature is saved in memory.

Using “Program” function

In order to select memorized temperature

▶ Press “Program” key.

LCD shows pre-memorized temperature, which is now the hot water
selected temperature.

6.8 Locked condition

This condition is only valid for appliances with one or more remote
controls installed.

Fig. 56

36

RTG 199 ME – 6 720 811 615 (2015/04)

Fig. 60 Locked condition

Whenever LCD shows , the temperature setting cannot be
adjusted because the appliance is in use by a user which already
selected a different temperature. Appliance will be automatically unlock
5 minutes after closing hot water tap.

7 Maintenance and service

Maintenance and service

Inlet Water Filter

• Verify the inlet filter screen is clean and undamaged. The inlet water
filter is located on the bottom of the appliance, to the right of the cold
water inlet fitting. (See Fig.35, page 30). Close installer supplied
water shutoff and remove wireform spring clip from filter. Remove
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 section7.3 for detailed
instructions on descaling the heat exchanger

Fin Coils

• Inspect heat exchanger fin coils for soot build-up or blockage. If there
is evidence of soot build-up or blockage, the heat exchanger should
be removed by a professional and cleaned thoroughly

DANGER:

▶ Always shut off the electrical power supply, shut off

the manual gas valve and shut off the water valves
whenever servicing.

NOTICE:

▶ Inspect and clean the complete water heating system

once a year.

▶ Carry out a maintenance as necessary. Immediately

repair all faults to avoid damage to the system.

Annual maintenance table

Every year

1. Inspect venting system X

2. Inspect combustion chamber X

3. Inspect burner X

4. Inspect condensate trap X

5. Inspect water filter X

Table 35 Annual maintenance

7.1 Annual maintenance

(To remove front cover, see page 9.)

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). Inspect the combustion air inlet pipe for
blockage or debris. Inspect combustion air and exhaust terminations
for blockage or debris. Inspect the combustion chamber for blockage
or debris.

Combustion Chamber

• Inspect burner observation window (Fig.70, #13, page 50) 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 4.4, page 24, chapter 4.3, page 11 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

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. If precautions are not taken, resulting damage
will not be covered under the warranty. 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.

2. Shut off gas supply to 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 until there is no water present
coming through the outlet water connection of the heater.

7. Reconnect water fittings and return heater to service when danger of
freezing has passed.

8. Empty condensate trap (if applicable).

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 A7 and E9 and boiling sounds in the heat
exchanger.
A water softener is required if the water hardness exceeds 6 grains/gal
(103 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. 61.)

▶ Using another line (B), connect the water outlet fitting on the water

heater. Route the other end of this line into a descaling reservoir.

RTG 199 ME – 6 720 811 615 (2015/04)

37

Maintenance and service

+

P

▶ 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.
▶ 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.
▶ 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.
▶ Reconnect electrical supply to unit, open water shutoff valves, and

return the unit to service.

The P1 minimum operating gas pressure is 3.5" WC for Natural Gas and
8" WC for Propane. Do not proceed in adjusting CO2 until pressure is at
or above these levels, but not to exceed 10.5" WC for Natural Gas and
13" WC for Propane.

A. Once Gas Pressure is adequate

▶ Press ON/OFF button to turn OFF the heater.
▶ Remove brass flat head screw on the exhaust collar as seen in Fig.62.
▶Insert CO

analyzer probe into the measuring port. The tip of the

2

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.

Fig. 61

[1] Pump

7.4 Adjusting CO2

The CO2 can only be adjusted by a certified gas technician with a
calibrated CO2 analyzer.

CO2 adjustment is required in Natural Gas
installations where energy content is less than 900
BTU/cuft, and in installations with repeated
unresolved EA and EC errors (ref. to page 44
“Problem solving”).

Fig. 62 Measuring port

▶ Press the ON/OFF button to turn ON the heater.
▶ Immediately following, press and hold simultaneously buttons

or and for 3 seconds, until display reads P2.

Fig. 63

▶ Press button until “P1” appears on display.

B. Measuring CO

(Combustion cover Installed):

2

▶ Open all hot water taps to achieve a flow rate of at least 6 gpm. (1 tub

and 2 sinks should be sufficient). If heater display reverts back to P2,
open more hot water fixtures to allow sufficient flow. Press + until P1
reappears on the display.

▶ Record the CO

reading in P1 below. (Analyzer reading may take

2

several minutes to stabilize).

▶ Press the ‘+’ button until P2 appears. Unit will ramp down to low fire

and the water flow should decrease.

▶ Record the CO

P1 CO

Reading: % CO

2

P2 CO2 Reading: % CO

reading in P2 below.

2

2

2

CAUTION:

▶ One factor that may affect CO

levels is improper gas

2

Note: When making adjustments, make sure combustion cover is
installed.

pressure. Please see Chapter4.14 for the procedure
to measure gas pressure and record your findings
below:

Static Gas Pressure: “ WC

P1 Operating Pressure: “ WC

38

RTG 199 ME – 6 720 811 615 (2015/04)

Max. CO level

+

CO2 range (%)

(measured)

Nat. Gas

max. input P1 6.3 % - 6.9 % < 250 ppm

min. input P2 2.3 % - 2.6 % < 60 ppm

LP Gas

max. input P1 8.7 % - 9.3 % < 250 ppm

min. input P2 2.7 % - 3.0 % < 60 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 CO

values.

2

Changes in these inputs can result in different CO and CO2
values on the same appliance.

Fig. 64 Adjusting P1 CO

level

2

Maintenance and service

Table 36 CO

C. Adjusting CO

& CO target numbers

2

:

2

Note: P1 adjustment will change the P2 reading. Confirm the P1

value BEFORE adjusting the P2 level.

1. If P1 CO

level is off:

2

▶ Loosen yellow painted Phillips screw (1) and cover should rotate

down (2) revealing a recessed brass slotted screw. Fig.64, page 39.

▶ Turning the slotted screw counter clockwise will raise P1 CO

and clockwise will lower P1 CO

levels. Adjustments to the slotted

2

levels

2

screw will also change P2 CO2 levels.

▶ After bringing the P1 CO2 readings in proper range, press the

button to enter the P2 mode. Verify CO

readings in P2 mode.

2

2. If P2 CO2 level is off:

▶ Remove yellow painted #40 Torx cover from the front of the gas

valve. (Fig.65, page 39) A plastic #40 Torx screw will be revealed.

▶ Turning the plastic #40 Torx screw counter clockwise will lower P2

CO

levels and clockwise will raise P2 CO2 levels.

2

Note: This screw adjustment is very sensitive and should be made in

small increments. It may take several minutes for readings to stabilize.

3. Verify both P1 and P2 CO

table36. Repeat steps 1 and 2 as necessary until CO

readings are within the ranges specified in

2

values are within

2

the specified ranges.

Final Readings

P1 CO2 Reading: % CO

2

Fig. 65 Adjusting P2 CO

level

2

P2 CO2 Reading: % CO

2

D. Returning to Service:

1. Return slotted screw cover to original position.

2. Reinstall Torx cover.

3. Remove CO2 analyzer probe and reinstall flathead screw with gasket

in exhaust collar.

4. Press ON/OFF button to turn OFF the heater and then turn ON the

heater.

5. Heater is ready for normal operation.

RTG 199 ME – 6 720 811 615 (2015/04)

39

Maintenance and service

7.5 Program values

This section describes details on programming the appliance. For most

Refer to chapter 7.6 Control board diagnostics (page 41) regarding how
to access these P-modes.

applications the factory default values will provide robust and stable
operation. Only adjust the factory settings if the installation requires
changes as indicated in the appropriate section of this manual.

CAUTION: Appliance malfunction!
▶ Misadjusted program values can lead to appliance

malfunction, errors, and service calls.

Program Description Factory Default MIN MAX Comment
P1 Maximum Power NG: 54,

LP: 46

21 NG: 55,

LP: 49

see chapter 4.14, page 32

note: reducing P1 values below maximum will

reduce maximum power of the appliance.

P2 Minimum Power 7 7 20 see chapter 4.3.8, page 22

P3 Remote

_0 _0 6 Not available

Controls installed

P4 Access to

E 0d 10f see chapter 7.6, page 41

Diagnostic Mode

P5 Cascade Mode NO NO CC contact manufacturer for details

P6 Temperature Unit °F °F °C

P7 Gas type selection LP or NG Preset from factory.

Contact manufacturer for details.

P8 Back light dE dE On dE turns back light off after 60 seconds from

last button pushed, ON turns backlight on

permanently.

P9 Fan Purge Runs secondary fan and primary fan when P9

is selected by depressing the “P” - button

PH Cascading type IC IC SC This menu is only available when cascade

mode is selected CC.

PC Primary/Secondary

CS CS Cn

Contact manufacturer for details.

mode

Table 37 Program values, factory default settings and ranges.

40

RTG 199 ME – 6 720 811 615 (2015/04)

7.6 Control board diagnostics

+

P

P

P

+

+

P

P

P

1. Press ON/OFF button into ON.

2. Immediately following, press and hold simultaneously buttons
or and for 3 seconds, until display reads P2.

3. Press to enter P2 adjustment. The current setting will appear on
the display. If not, repeat process.

4. Press and release the button on the control panel until the
display reads 'P4'. You are now in the diagnostic mode of the control
board.

5. When the display reads 'P4', press and release the button once
again and the display should read 'E'.

6. Use the and button on the control board to cycle through
different diagnostic modes available.

7. Once in the selected diagnostic mode of your choice, press and
release the button to display the diagnostic information.

EXAMPLE: to read the flow rate in gallons per minute while the unit is
flowing water, cycle to the '3d' mode and press the button. A
reading of 25 on the display would indicate the heater is reading a flow
rate of 2.5 gallons/minute.

8. Once the information is obtained, press the button again to
return to the diagnostic mode menu and scroll to addition diagnostic
information.

9. Press ON/OFF button to turn OFF the appliance and back ON again to
return heater to normal function.

Diagnostic menu
E Entry/Exit into sub-modes

0d Heat exchanger water temperature

1d Inlet water temperature (°F)

2d Outlet water temperature (°F)

3d Water flow (gallons/min)

4d Bypass control monitor (°F) [0d - 2d]

5d Fan speed (Hz)

6d Burner power (%)

7d Maximum power (kW)

8d Back flow temperature (°C)

9d Exhaust temperature (°C)

1F Most recent error/failure

Maintenance and service

Diagnostic menu
3P* Temperature range - H (100-140°F)

Temperature range - C (100-184°F)

H0 Numbers of hours - mode 0

H1 Numbers of hours - mode 1

H2 Numbers of hours - mode 2

Table 38 * Settings define from factory

7.6.1 Working hours

To see how many hours the appliance has worked, please enter the
“Diagnostic menu” (chapter 7.6);

▶ Select the sub-mode “H0”.

Write the number that shows in the display.

▶ Select the sub-mode “H1”.

Write the number that shows in the display.

▶ Select the sub-mode “H2”.

Write the number that shows in the display.

After checking the sub-modes H0, H1 and H2, introduce the values in
the table below;

Working hours

Number in H0 ______ _______ +

Number in H1 ______ (X 100) = _______ +

Number in H2 ______ (X 10 000) = _______

(H0 + H1 + H2) = Total of hours __________

Table 39

Example:

Calculation of number of working hours,

Working hours

Number in H0 60 60 +

Number in H1 5 (X 100) = 500 +

Number in H2 0 (X 10 000) = 0

(H0 + H1 + H2) = Total of hours 560

Table 40

2F 2nd most recent error

3F 3rd most recent error

4F 4th most recent error

5F 5th most recent error

6F 6th most recent error

7F 7th most recent error

8F 8th most recent error

9F 9th most recent error

10F 10th most recent error

1P* Appliance type - Cd (Condensing)

Appliance type - nC (Non condensing)

2P* Appliance power - 175 / 199 (kBTU/hr)

Table 38 * Settings define from factory

RTG 199 ME – 6 720 811 615 (2015/04)

41

Troubleshooting

8Troubleshooting

CAUTION:

▶ If you are unable to perform the tasks listed below, or

need additional assistance please contact your
original installer or a licensed gas technician.

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 8).

8.2 Burner does not ignite when hot water is turned ON

It is recommended to use “Control board diagnostics” page 41, chapter

7.6 as a tool for problem solving. If the display is showing a blinking two
digit code, refer to this section.

1. If the display is blank, verify power to outlet. (120VAC/60Hz
properly grounded circuit required). Verify that the heater power
button is pressed ON.

2. Verify the fuses in the control board are good. To access fuses, the
control board must be removed. See chapter 5.2, page 33.

3. Make sure cold water inlet connection is plumbed to the right side of
heater when facing unit. See Fig.34, page 29.

4. A minimum of 0.5 gallons per minute (1.9 l/m) of hot water demand
is required to activate the heater. Confirm at least 0.5 gpm flow by
timing how long it takes to fill a container. A quart container should fill
in 23 seconds or less, from hot water tap only, to activate heater. In
unusual circumstances with high inlet water temperatures and low
set temperatures, the heater may increase the activation rate above

0.5 gpm to avoid overheating at low flows. 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 7.1, page 37.

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. 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 button pressed switch turned to OFF and the power
supply cord unplugged, remove the unit's front cover (See fig. 3,
page 8). Check wire connections between the water valve, control
unit and electrode set.

9. Water heater in solar mode. If inlet water temperatures exceed the
water heater's set temperature, the burners will not ignite and the
solar mode indicator will show on the display. See fig. 51, page 35.

8.3 Water is too hot

1. Selected temperature on the unit is too high. To lower output
temperature, see chapter 6.4, page 35.

2. Clean inlet filter screen per chapter 7.1, page 37 to increase flow
through the heater.

3. Inspect the water path for obstructions. Make sure all shower heads,
faucet aerators and whole house filters are clear of debris.

4. Confirm the heater's gas type coincides with the type of gas being
supplied. See fig. 2, page 8 for location of rating plate.

5. Avoid restrictive outlets. Clean all shower heads and faucet aerators.
It may be necessary to upgrade to higher flow rate shower heads if
allowable by local code.

6. In areas where the water has a high mineral content, periodic
descaling may necessary. See chapter7.3, page 37 for directions.

8.4 Water is not hot enough

1. Selected temperature on the unit is too low. To raise output
temperature, see chapter6.4, page 35.

2. Clean inlet filter screen. See chapter7.1, page 37 to increase flow
through the heater.

3. Inspect the water path for obstructions. Make sure all showerheads,
faucet aerators and whole house filters are clear of debris.

4. Confirm the heater's gas type coincides with the type of gas being
supplied. See fig. 2, page 8 for location of rating plate.

5. Check inlet gas particle screen for blockage at gas inlet connection on
bottom of unit.

6. Verify gas pressure is in accordance with specifications in
chapter4.14, page 32. A gas pressure reading is needed to proceed
further. Contact your original installer or a local certified gas
technician to obtain this reading.

7. 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.

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. Ensure that gas pressure is in accordance with specifications in
chapter4.14, page 32. A gas pressure reading is needed to proceed
further. Contact your original installer or a local certified gas
technician to obtain this reading. If gas pressure is inadequate, the
water heater will close its motorized water valve, reducing the hot
water flow rate in an attempt to reach the selected output
temperature.

3. 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.

4. Clean inlet filter screen per chapter7.1, page 37.

5. Inspect the water path for obstructions. Make sure all shower heads,
faucet aerators and whole house filters are clear of debris.

42

RTG 199 ME – 6 720 811 615 (2015/04)

8.6 Hot water temperature fluctuates at tap

1. Hot water is very hot out of the water heater, requiring mixing in cold
water in order to attain a usable hot water temperature. The addition
of too much cold will overpower hot water flow from the tankless
water heater.
If this slows the flow through the tankless water heater below its
activation point, it will shut off the burners. The end result is nothing
but cold water coming out of the outlet.

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 sc reen is clean and clear
of debris. See chapter7.1, page 37 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.

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 40

- 60 psi (2.75 - 4.15 bar). Consult your installer or local plumber for
effective ways to maintain constant water pressure to the appliance
when on a well system.

Troubleshooting

8.7 Noisy burner/heater during operation

1. Sealed combustion leak. Make sure combustion cover is securely
fastened. Ensure the exhaust vent adaptor is properly sealed with
supplied gasket. Leaky seals create improper combustion resulting
in noise.

2. Improper venting. Venting that is unsealed, the wrong material, too
big in diameter or too long in run will result in unstable burner flames
and noise. Ensure venting is in accordance with specifications in
chapter4.3, page 11.

3. Lack of adequate combustion air. Drawing combustion air from a
ro om a rea of i nad eq uat e si ze w ill res ult in u nst ab le b urn er f lam es a nd
noise. Improper piping of combustion air to the outside or
insufficient space will result in unstable burner flames and noise.
Ensure adequate combustion air is provided from the unit in
accordance with specifications in Section4.4, page 24 Combustion
Air Requirements.

4. Cross contamination. Ensure that intake and exhaust terminations
maintain required clearances as stated in chapter 4.3, page 11.
Cross contamination between intake and exhaust may cause
unstable burner flames and noise.

5. Lack of gas pressure. Inadequate gas pressure will cause the fuel-to­air mixture (CO
burner flames and noise. Ensure gas pressure is in accordance with
specifications in Section4.14, page 32 Measuring Gas Pressure. A
gas pressure reading is needed to proceed further. Contact your
original installer or a local certified gas technician to obtain this
reading.

6. Verify proper CO
adjustments must be done by a certified gas technician with a
calibrated combustion gas analyzer.

) to be out of adjustment. This will result in unstable

2

readings per chapter7.4, page 38. CO2

2

RTG 199 ME – 6 720 811 615 (2015/04)

43

Problem solving

9Problem solving

9.1 Error code diagnostics

To remove error code from the display, press the reset
button.

Display Cause Solution

Fault in the flue gas limiter.
Temperature above 230°F (110 °C)
inside the cabinet.

Wire harness defect. 1. Check wire harness.

1. Check continuity of the flue gas limiter (see fig. 70, page 50). Go to steps two and
three to determine flue gas limiter fault and repair it.

2. Check for flue gas leakage around the top and bottom seals of heat exchanger, use
mirror to check around the rear as well as the viewing window.

3. Unplug heater and check that flue gas limiter connector and spade connections
are secure.

4. Check the wiring harness connections on the control board.

2. Measure resistence loose on wire harness nearby the overmolding, must be 115 ­120 ohm.

3. Check diagnostic menu > 1P, “nC” must be showed on the display.

Backflow temperature sensor defect ­happens if sensor is disconnected or
short circuit.

Outlet temperature sensor fault
(Temperature below 36°F or above
210°F).

(Flashing) Outlet temperature sensor not sensing

expected output temperature.
(Status message, not an error).

Primary fan rotation too low in
operation.

Table 41

* By installer or service technician only.

1. Check backflow temperature sensor connection. See fig. 70, #14, page 50.

2. Replace exhaust temperature sensor.

3. Check sensor (ref. page 48, chapter 11).

1. Sensor may trip if water temperature drops below 36 °F to protect heater from
freezing conditions. Any damage due to freezing conditions is not covered under
warranty.

2. In areas where water has a high mineral content, periodic descaling may
necessary.

3. Check wire connections at outlet temperature sensor.

4. Check sensor (ref. page 48, chapter 11).

1. Check gas pressure, see chapter 4.14, page 32. Low gas pressure may prevent
the heater from reaching desired output temperature.

2. Check supply voltage. It must be 120VAC and properly grounded.

3. Check wire connections at outlet temperature sensor.

4. Possible defective control unit call manufacturer for further instructions.

1. Disconnect power supply cord and check wire connection on back side of fan and
the connectors on the control board.

2. Check supply voltage. It must be 120VAC and properly grounded.

3. Check venting specifications are met, see chapter 4.3, page 11. Long vent
lengths, venting with more than three elbows, blocked vent or combination
venting may cause this failure.

4. Ensure intake and exhaust terminations maintain the required clearances stated in
the manual. Cross contamination between intake and exhaust may cause the fan
to alter its rotational speed.

5. Check gas pressure. Low gas pressure may cause the fan to change its speed to
meet desired temperature.

6. Possible defective control unit call manufacturer for further instructions.

44

RTG 199 ME – 6 720 811 615 (2015/04)

Display Cause Solution

No rotational speed sensor signal from
primary fan.

1. Disconnect power supply cord and check wire connections on back side of fan and

the two connectors on the control board.

2. Check supply voltage. It must be 120VAC and properly grounded.

3. Possible defective component in fan or defective control unit call manufacturer for

further instructions.

Problem solving

(Flashing) Water flow signal over specified

maximum value.
Water flow > 10 gallon/min.
(Status message).

Over-temperature detected by outlet
temperature sensor.
Temperature > 185°F

Inlet temperature sensor fault. 1. Check wire connections at inlet temperature sensor.

Backflow temperature sensor over
309°F.
The appliance will close the burner and
lock (non-volatile).

1. Disconnect power supply cord and check wire connections on water valve and the

two connectors on the control board.

2. Excessive water pressure and flow. Ensure water pressure is less than 150psi and

flow rate is below 10 gallons per minute.

1. In areas where water has a high mineral content, periodic descaling may be

necessary. See chapter7.3, page 37 for directions.

2. Check wire connections at outlet temperature sensor.

3. Check sensor (ref. page 47, chapter 10).

2. Sensor may trip if water temperature drops below 36°F (2°C). Protect heater

from freezing conditions as any damage due to freezing conditions is not covered
under warranty.

3. Check sensor (ref. page 48, chapter 11).

1. Check inlet/outlet vent pipes.

2. Check if secondary fan connections are disconnected.

3. Check if venting specifications are met. Long vent lengths, venting with more than

three elbows, blocked vent or combination venting may cause this failure. See
chapter 4.3, page 11.

4. Call manufacturer for further instructions.

Table 41

Overheat sensor (ECO) open circuit
(resets when cooler temperatures are
detected 220°F/104 °C).

* By installer or service technician only.

1. Disconnect power supply cord and check wire connections on the overheat sensor

(fig. 70, #11, page 50) and the two connectors on the control board.

2. Check white wire connections at the overheat sensor. Clean terminals with an

eraser. If badly corroded, replace sensor and wire harness.

3. Check that venting specifications are met, see chapter 4.3, page 11. Long vent

lengths, venting with more than three elbows, blocked vent or combination
venting may cause this failure.

4. In areas where water has a high mineral content, periodic descaling may

necessary, see chapter 7.3, page 37.

5. Unplug power supply cord to the water heater. Open a hot water tap for several

minutes to allow cold water to pass through heat exchanger. Close hot water tap
and disconnect lead wires to overheat sensor. Using a multimeter, check
continuity through overheat sensor contacts. Replace sensor if open.

RTG 199 ME – 6 720 811 615 (2015/04)

45

Problem solving

Display Cause Solution

No flame ionization detected with
water flow.

1. Verify that all manual gas shut off valves are open.

2. Check gas type. See fig. 2, page 8.

3. Reset error code and open a water tap to cycle the heater in an effort to purge air.
Cycling hot water tap on and off multiple times may be necessary. If heater still
faults with EA error code, have a licensed gas technician properly purge air out of
the gas line leading to the water heater.

4. Check three wire connections to ignition group on the lower front of the heat
exchanger are secure.

5. Check gas pressure. See chapter 4.14, page 32.

6. Check venting specifications are met. Improper venting may cause premature
failure of the flame sensor rod. See chapter 4.3, page 11.

7. Check that the minimum power fan speed has been adjusted to the proper value.
See page 22.

8. Observe inside the viewing window of the heat exchanger when a hot water tap is
opened. Sparking should be followed by a steady blue flame. If flame is unstable/
yellow with proper gas pressure, confirm CO2 readings per chapter 7.4, page 38.

Ionization failure during operation. 1. Check gas type, fig. 2, page 8.

2. Check three wire connections to ignition group on the lower front of the heat
exchanger are secure.

3. Verify that venting specifications are met. Improper venting may cause premature
failure of the flame sensor rod. See chapter 4.3, page 11.

4. Check gas pressure. See chapter 4.14, page 32.

5. Check and adjust CO2 readings. See chapter 7.4, page 38.

6. Check that the minimum power fan speed has been adjusted to the proper value.
See page 22.

Table 41

Internal hardware/software failure. 1. Disconnect power supply cord and check the two wire and ground connections on

Ionization error at standby. 1. Loose connection to the flame ionization rod. Verify that the thinner wire leading

Gas leakage error, gas valve circuit not
closing properly.

* By installer or service technician only.

control board as well as ground connection on heater chassis.

2. Pressing the wrong combination of buttons on the control unit can create
confusion among the microprocessors inside. In this case, the error code should
not happen more than once or twice. Turn off the water heater. Turn water heater
back on and try resetting error code. Use the reset button ( ) to reset any
error codes.

3. Possible defective control unit call manufacturer for further instructions.

from the control unit is securely connected to the set of electrodes located on the
lower front of the heat exchanger.

2. Flame ionization rod or control unit may be damaged. Contact manufacturer for
further instruction.

1. Disconnect power supply cord and check wire connections on gas valve and the
two connectors on the control board.

2. Flow water out of a hot water tap above the minimum activation point of 0.5 GPM.
Measure voltage at the gas valve wire plug connection. The voltage should
measure 24VDC between the left pair of wires and 24VDC between the right pair
of wires when the unit is operating. If voltage is not proper, contact manufacturer
for further instruction.

3. Gas valve may be defective, contact manufacturer for further instruction.

46

RTG 199 ME – 6 720 811 615 (2015/04)

10 Electrical diagram

20 ... 120 ... 1

16 ... 116 ... 1

JP5

JP6

JP7

JP8

JP2

M

PS

MM

E

FS

T=104°C
T=220°F

Casc.
input

Casc.
output

2

1

4

5

6

7

9

10

11

12

13

15

16

20

19

18

21

22

17

14

8

Back flow

3

6720608158-92.1AL

T=110°C
T=230°F

Electrical diagram

Fig. 66 Electrical scheme

[1] Intlet water temperature sensor
[2] Outlet water temperature sensor
[3] Backflow temperature sensor
[4] Cascading output connection
[5] Cascading input connection
[6] Ionization sensor
[7] Water flow sensor
[8] Flue gas limiter
[9] Heat exchanger overheat sensor (ECO)
[10] Gas valve
[11] Jumper resistance
[12] Water valve
[13] Primary fan
[14] ON/OFF switch
[15] Secondary fan
[16] AC plug
[17] Main connection
[18] Ignition electrodes
[19] Ground post
[20] Antifreeze kit connection
[21] Fuse
[22] Fuse

RTG 199 ME – 6 720 811 615 (2015/04)

47

Sensor resistance charts

11 Sensor resistance charts

Fig. 67 Outlet / Inlet immersion sensor characteristics

Fig. 68

48

RTG 199 ME – 6 720 811 615 (2015/04)

12 Functional scheme

Functional scheme

Fig. 69 Functional scheme

RTG 199 ME – 6 720 811 615 (2015/04)

49

Interior components diagram

13 Interior components diagram

13.1 Interior components

Fig. 70 Components

[1] Flue gas collector
[2] Heat exchanger
[3] Flame sensor
[4] Primary fan (Mixer)
[5] Outlet temperature sensor
[6] LCD display
[7] On/Off button
[8] Reset button
[9] Program key
[10] Flue gas limiter
[11] Heat exchanger overheat sensor

50

[12] Ignition electrodes
[13] Observation window
[14] Backflow temperature sensor
[15] Secondary air fan
[16] Gas valve
[17] Water valve with engine and temperature sensor
[18] Control unit
[19] Up button
[20] Down button
[21] LED

RTG 199 ME – 6 720 811 615 (2015/04)

14 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 or with the remote

control. 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).

Protecting the environment

RTG 199 ME – 6 720 811 615 (2015/04)

51

LIMITED TANKLESS HEATER WARRANTY

238-50821-00A (5/14)

BRADFORD WHITE CORPORATION

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?x

1. This limited warranty does not cover leakage or other
malfunction 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.

WHAT IS THE DURATION OF THE
IMPLIED WARRANTY?

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.

LIMITED TANKLESS HEATER WARRANTY

TWELVE YEAR LIMITED HEAT EXCHANGER
WARRANTY*

A no charge* replacement unit 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: 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 five (5) years on heat exchanger and
one (1) year on parts regardless of any other
warranty period specified. Circulated water
system will be warranted for three (3) years. All
replacement heaters and parts carry the
balance of the original warranty, i.e. if an original
twelve (12) year warranted heater develops a
leak due to defects in materials/workmanship
after only eight (8) years, the replacement unit is
warranted for four (4) years in this example.

xRestrictions are not applicable to implied warranties in California. See “Special State Provisions” on reverse side.

15 LIMITED TANKLESS HEATER WARRANTY

Fig. 71

52

RTG 199 ME – 6 720 811 615 (2015/04)

238-50821-00A (5/14)

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.

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
 200 LAFAYETTE STREET
 MIDDLEVILLE, MI 49333
 1-800-531-2111

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 ___________________________

CALIFORNIA RESIDENTS CALL 1-800-538-2020

Please have model number and serial number ready.

LIMITED TANKLESS HEATER WARRANTY (CONTINUED)

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.

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

LIMITED TANKLESS HEATER WARRANTY

Fig. 72

RTG 199 ME – 6 720 811 615 (2015/04)

53

Installer Checklist to be completed by installer upon installation

16 Installer Checklist to be completed by installer

upon installation

Serial Number
(8 digit serial number is located
on rating plate on right side
panel)

Gas Pressure Reading

1)

Static

Operating

Water Pressure

Building Water Pressure

Range if on Well system

Installing Company

Installer name

___ ___ ___ ___ ___ ___ ___ ___

Address

Phone

Table 42

1) See Chapter 4.14, page 32 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.

54

RTG 199 ME – 6 720 811 615 (2015/04)

Notes

RTG 199 ME – 6 720 811 615 (2015/04)

55