Heat Transfer Gas Fired User manual

• Installation • Operation • Maintenance
© 2007 Heat Transfer Products, Inc.

1
CONTENTS
nWARNING
If the information in this manual is not followed exactly, a fire or explo-
sion may result causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch: do not use any phone in
your building.
• Immediately call your gas supplier from a neighbor's phone.
Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.

2
CONTENTS
CONTENTS
Part 1 – Product and Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Part 2 – How The Phoenix Operates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Part 3 – Prepare Water Heater Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
A. Installations Must Comply With:
B. Before Locating the Phoenix
C. Clearances for Service Access
D. Residential Garage Installation
E. Exhaust Vent and Intake Air Vent
F. Prevent Combustion Air Contamination
G. When Removing a Water Heater from an Existing Common Vent System
H. Water Chemistry
I. Temperature and Pressure Relief Valve
J. Expansion Tank
K. Piping
L. Auxiliary Connection
Part 4 – Prepare Water Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-19
A. Electrical Connection
B. Gas Connection
C. Gas Piping
D. Gas Table
E. Dungs Gas Valve
Part 5 – Venting Combustion Air And Condensate Removal . . . . . . . . . . . . . . . . . . . . 19-27
A. Installing Exhaust Vent and Intake Air Vent
B. General
C. Approved Materials for Exhaust Vent and Intake Air Vent
D. Exhaust Vent and Intake Air Vent Pipe Location
E. Exhaust Vent and Intake Air Vent Sizing
F. Longer Vent Runs
G. Exhaust Vent and Intake Air Pipe Installation
H. Water Heater Removal from a Common Vent System
I. Condensate Removal System
J. Diagrams for Venting
Part 6 – Start-up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-31
A. Operating Instructions
B. Overall Appliance and Control Operation
C. Status Menu
D. Test Mode
E. Maintenance
F. Internal Wiring
Part 7 – Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
A. Shutdown Procedure
B. Vacation Procedure
C. Failure to Operate
Part 8 – Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-42
A. Phoenix Error Code
B. Phoenix Error
C. Phoenix Fault

3
PRODUCT AND SAFETY INFORMATION
PART 1: PRODUCT AND SAFETY INFORMATION
nWARNING
Installer — Read all instructions in this manual,
and the Venting section, before installing.
Perform steps in the order given.
User — This manual is for use only by a
qualified heating installer/service technician.
Refer to User’s Information Manual for your
reference.
User — Have this water heater serviced/
inspected by a qualified service technician
annually.
Failure to comply with the above could result in
severe personal injury, death or substantial
property damage.
nWARNING
Failure to adhere to the guidelines on this page
can result in severe personal injury, death or
substantial property damage.
nWARNING
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas suppliers'
instructions.
• If you cannot reach your gas supplier, call the
fire department.
SPECIAL ATTENTION BOXES
The following defined terms are used throughout this manual to bring attention to the presence of
hazards of various risk levels or to important information concerning the product.
nDANGER
DANGER indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury.
nWARNING
WARNING indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
nCAUTION
CAUTION Indicates a potentially hazardous
situation which, if not avoided, may result in
minor or moderate injury.
CAUTION
CAUTION used without the safety alert symbol
indicates a potentially hazardous situation which,
if not avoided, may result in property damage.
DEFINITIONS

4
HOW THE PHOENIX OPERATES
PART 2: HOW THE PHOENIX OPERATES
Phoenix Modulation Condensing Technology is an intelligent system that delivers highly efficient
water heating, while maximizing efficiency by measuring the Data Parameters of your water heating
system.
1. Stainless Steel Water Storage Tank
The Stainless Steel Water storage tank has a combustion chamber submerged into the tank water.
When the water heater is fired, the combustion gases heat the combustion chamber walls,
transferring the heat directly into the surrounding water. The hot gases are blown into the secondary
heat exchanger coils, where even more heat is transferred into the water, wringing even more heat
from the gases.
2. Modulating Combustion System
Modulation during the water heating operation is based on the tank temperature. The control
monitors the system to regulate the output of the burner during operation to match the system
demand. This increase in efficiency allows for substantial fuel savings.
3. Gas Valve
The gas valve senses suction from the blower, allowing gas to flow only if the gas valve is energized
and combustion air is flowing.
4. Upper Supply Tank Sensor
This sensor monitors water heater upper portion water temperature (system supply). The control
module adjusts the burner firing rate so the outlet temperature is correct.
5. Lower Return Tank Sensor
This sensor monitors the lower portion of the water heater return water temperature (system return).
The control module reduces or increases the input, depending on how close the water temperature
is to the outlet water temperature set point.
6. Control
The integrated control system monitors the upper and lower water temperature and regulates the
fan speed to regulate the unit’s BTU output. This allows the unit to only deliver the amount of heated
energy required and nothing more!
7. Burner
Constructed of high grade stainless steel construction, the burner uses pre-mixed air and gas and
provides a wide range of firing rates.
8. Condensate drain connection
This is a condensing high efficiency appliance, therefore this unit has a condensate removal system.
Condensate is nothing more than water vapor, derived from the combustion products, similar to an
automobile when it is initially started. It is very important that the condensate line is sloped away
from the water heater and down to a suitable inside drain. If the condensate outlet on the Phoenix
is lower than the drain, you must use a condensate removal pump (kit p/n 554200 available from
Heat Transfer Products, Inc.) A condensate neutralizer, if required by local authorities can be made
up of lime crystals, marble or phosphate chips and will neutralize the condensate. This can be done
in the field by the installer or you may purchase one from Heat Transfer Products, Inc. (P/N N1100).
It is also very important that the condensate line is not exposed to freezing temperatures or any other
type of blockage. Plastic tubing must be the only material used for the condensate line. Steel, brass,
copper or others will be subject to corrosion or deterioration. A second vent may be necessary to
prevent condensate line vacuum lock if a long horizontal run is used. Also, an increase in pipe size
may be necessary to drain properly. Support of the condensation line may be necessary to avoid
blockage of the condensate flow.

5
HOW THE PHOENIX OPERATES
PART 2: HOW THE PHOENIX OPERATES (CONTINUED)
9. Spark ignition
The burner flame is ignited by applying a high voltage to the system spark electrode. This causes a
spark from electrode to ground.
THE PHOENIX SOLAR HOT WATER HEATER
The Phoenix Solar Hot Water Heater has an internal Solar Heat Exchanger for use with solar panels.
The Phoenix Solar will transfer energy from the sun and will provide hot water through the gas fired
back-up when there is not sufficient solar energy. (refer to solar piping details in this manual for sug-
gested piping application.)
SOLAR PIPING CONNECTION
When making a connection to the heat exchangers, use Teflon tape and joint compound to prevent
leaks. The connections to the heat exchanger are 1” NPT. Do not apply heat directly to heat exchang-
er thread connection when sweating fittings.
The freeze protection fluid must be rated as non-toxic if used to protect the system from freezing.
Anti-freeze will turn acidic when exposed to prolonged high temperature.
Regular scheduled maintenance must be established to monitor and maintain the proper PH level of the
heat transfer fluid in the system to protect the heat exchanger and other components of the system.
PART 3: PREPARE WATER HEATER LOCATION
A. INSTALLATIONS MUST COMPLY WITH:
• Local, state, provincial, and national codes, laws, regulations and ordinances.
• National Fuel Gas Code, ANSI Z223.1 – latest edition.
• National Electrical Code.
• For Canada only: B149.1 or B149.2 Installation Code, CSA C22.1 Canadian Electrical Code Part 1
and any local codes.
nDANGER
Water temperature over 125 degrees F. can cause severe burns
instantly, or death from scalds. Children, disabled, and elderly are
at highest risk of being scalded. See instruction manual before
setting temperature at water heater. Feel water before bathing or
showering! Temperature limiting valves are available.
NOTICE
The Phoenix gas manifold and controls met safe lighting and other performance criteria
when undergoing tests specified in ANSI Z21.10.3 — latest edition.
nWARNING
Many heat transfer fluids are classified as toxic. Do not introduce heat transfer fluids
into any fittings on the heater except those clearly marked for that purpose.

6
PREPARATION
B. BEFORE LOCATING THE PHOENIX
1. Check for nearby connection to:
• System water piping
• Venting connections
• Gas supply piping
• Electrical power
2. Check area around water heater. Remove any combustible materials, gasoline and other
flammable liquids.
3. The Phoenix gas control system components are
protected from dripping or spraying water or rain
during operation or service.
4. If the Phoenix Water Heater is to replace an
existing water heater, check for and correct any
existing system problems such as:
• System leaks.
• Incorrectly-sized expansion tank.
C. CLEARANCES FOR SERVICE ACCESS
1. If you do not provide minimum clearances, it
might not be possible to service the water heater
without removing it from the space. (See Fig. 3-
1 at right)
03/22/07
LP-179-T
CLEARANCE
ZERO
12" MIN. 12" MIN.
CLEARANCE
CLEARANCE
CLEARANCE
24" MIN.
SERVICE CLEARANCE
Fig. 3-1 Phoenix Top View
PART 3: PREPARE WATER HEATER LOCATION (CONTINUED)
nWARNING
Failure to keep water heater area clear and free of combustible materials, gasoline and
other flammable liquids and vapors can result in severe personal injury, death or
substantial property damage.
nWARNING
The space must be provided with combustion/ventilation air openings correctly sized
for all other appliances located in the same space as the Phoenix. Failure to comply with
the above warnings could result in severe personal injury, death or substantial property
damage.
RECOMMENDED SERVICE CLEARANCE
TO OPEN DRAIN.
LINE SHOULD BE AT
LEAST 3/4" ID AND
PITCHED FOR PROPER
DRAINAGE.
DIAMETER OF WATER HEATER
PLUS 2" MINIMUM
MAXIMUM 2"
LP-179-W
07/11/07 LP-179-T
03/22/07

7
PREPARATION
D. RESIDENTIAL GARAGE INSTALLATION
Precautions
Take the following special precautions when installing the water heater in a residential garage. If the
heater is located in a residential garage, per ANSI Z223.1, paragraph 5.1.9:
• Place the Phoenix with a minimum of 18 inches above the floor of the garage to the bottom of the
heater to ensure the burner and ignition devices will be no less than 18 inches above the floor.
• Locate or protect the water heater so it cannot be damaged by a moving vehicle.
E. EXHAUST VENT AND INTAKE AIR VENT
The Phoenix requires a special vent system, designed for pressurized venting. Phoenix Water
Heaters are rated ANSI Z21.10.3 Category IV (pressurized vent, likely to condense in the vent).
You must also install air intake piping from outside to the water heater flue adaptor. The resultant
installation is categorized as direct vent (sealed combustion). Note: To prevent combustion air
contamination see Table 3-2 in this section for examples of areas to avoid when con-
sidering exhaust vent and intake air vent termination.
Intake and exhaust must terminate near each other and may be vented vertically through the roof or
through a side wall. The intake and exhuast venting methods are detailed in the Venting Section. Do
not attempt to install the Phoenix Water Heater using any other venting means. Be sure to locate the
Phoenix such that the air intake and exhaust vent piping can be routed through the building and prop-
erly terminated outdoors. The air intake and exhaust vent piping lengths, routing and termination
method must all comply with the methods and limits given in the Venting section.
F. PREVENT COMBUSTION AIR CONTAMINATION
Install intake air piping for the Phoenix Water Heater as described in the Venting section. Do not ter-
minate exhaust in locations that can allow contamination of intake air.
PART 3: PREPARE WATER HEATER LOCATION (CONTINUED)
nWARNING
You must pipe outside air to the water heater air intake. Ensure that the intake air will not
contain any of the contaminants below. Contaminated air will damage the water heater,
resulting in possible severe personal injury, death or substantial property damage. For
example, do not pipe intake air vent near a swimming pool. Also avoid areas subject to
exhaust fumes from laundry facilities. These areas will always contain contaminants.
Products to avoid
Spray cans containing fluorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
Adhesives used to fasten building products and other similar products
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
New building construction
Remodeling areas
Garages and workshops
Table 3-2: Corrosive contaminants and sources

8
PREPARATION
G. WHEN REMOVING A WATER HEATER FROM AN EXISTING COMMON VENT SYSTEM
At the time of removal of an existing gas water heater, the following steps shall be followed with
each appliance remaining connected to the common venting system placed in operation, while the
other appliances remaining connected to the common venting system are not in operation.
a. Seal any unused openings in the common venting system.
b. Visually inspect the venting system for proper size and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe
condition.
c. Insofar as is practical, close all building doors and windows and all doors between the space in
which the appliances remaining connected to the common venting system are located and other
spaces of the building. Turn on clothes dryers and any appliance not connected to the common
venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they
will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.
d. Place in operation the appliance being inspected. Follow the lighting instructions. Adjust
thermostat so appliance will operate continuously.
e. Test for spillage after 5 minutes of main burner operation. Use the flame of a match or candle, or
smoke from a cigarette, cigar, or pipe.
f. After it has been determined that each appliance remaining connected to the common venting
system properly vents when tested as outlined herein, return doors, windows, exhaust fans,
fireplace dampers, and any other gas-burning appliance to their previous conditions of use.
g. Any improper operation of common venting system should be corrected so the installation
conforms with the National Fuel Gas Code, ANSI Z223.1 — latest edition. Correct by resizing to
approach the minimum size as determined using the appropriate tables in Table 13 of NFPA54
ANSI Z223.1 2006 of that code. Canadian installations must comply with B149.1 or B149.2
Installation Code.
H. WATER CHEMISTRY
PART 3: PREPARE WATER HEATER LOCATION (CONTINUED)
nDANGER
Do not install the Phoenix into a common vent with any other appliance. This will cause
flue gas spillage or appliance malfunction, resulting in possible severe personal injury,
death or substantial property damage.
nWARNING
Failure to follow all instructions can result in flue gas spillage and carbon monoxide
emissions, causing severe personal injury or death.
nCAUTION
Chemical imbalance of your water can cause severe damage to your water heater and
associated equipment and may also affect the efficiency. You may have to have your
water quality professionally analyzed to determine whether you need to install a water
softener. Failure of a heat exchanger due to lime scale build-up on the heating surface,
low pH or other chemical imbalance is non-warrantable.

9
PREPARATION
1. Water Hardness
Water hardness is mainly due to the presence of calcium and magnesium salts dissolved in the
water. The concentration of these salts is expressed in mg/L, ppm or grains per gallon, as a
measure of relative hardness of water. Grains per gallon is the common reference measurement
used in the U.S. water heater industry. Hardness expresses as mg/L or ppm may be divided by
17.1 to convert to grains per gallon. Water may be classified as very soft, slightly hard, moderately
hard or hard based on its hardness number. The minerals in the water will precipitate out when
the water is heated and will cause accelerated lime and scale accumulation on a heat transfer
surface.
If the hardness of the water exceeds the maximum level of 25 grains per gallon, water should be
softened to a hardness level no lower than 5 grains per gallon. Water softened as low as 0 to 1
grain per gallon may be under-saturated with respect to calcium carbonate resulting in water that
is aggressive and corrosive.
2. pH of Water
pH is a measure of relative acidity, neutrality or alkalinity. Dissolved minerals and gases affect
water's pH. The pH scale ranges from 0 to 14. Water with a pH of 7.0 is considered neutral. Water
with a pH lower than 7 is considered acidic. Water with a pH higher than 7 is considered alkaline.
A neutral pH (around 7) is desirable for most potable water applications. Corrosion damage and
heater failures resulting from water pH levels of lower than 6 or higher than 8 are non-warrantable.
The ideal pH range for water used in a storage tank or a water heater system is 7.2 to 7.8.
3. Total Dissolved Solids
Total dissolved solids (TDS) is a measure of all minerals and solids that are dissolved in the water.
The concentration of total dissolved solids is usually expressed in parts per million (ppm) as
measured in a water sample. Water with a high TDS concentration will greatly accelerate lime and
scale formation in the hot water system. Most high TDS concentrations will precipitate out of the
water when heated. This can generate a scale accumulation on the heat transfer surface that will
greatly reduce the service life of a water heater. This scale accumulation can also impede the ability
of the heat exchanger to transfer heat into the water. A heat exchanger that is damaged or blocked
by lime/scale accumulation must be replaced. Failure of a water heater due to lime scale build up
on the heating surface is non-warrantable. The manufacturer of the water heater has no control
of the water quality, especially the TDS levels in your system. Total dissolved solids in excess of
2,000 ppm will accelerate lime and scale formation in the heat exchanger. Heat exchanger failure
due to total dissolved solids in excess of 2,000 ppm is a non-warrantable condition.
PART 3: PREPARE WATER HEATER LOCATION (CONTINUED)
CAUTION
Failure of a heat exchanger due to lime scale build-up on the heating surface, low pH
or other chemical imbalance is non-warrantable.

10
PREPARATION
I. TEMPERATURE AND PRESSURE RELIEF VALVE
A temperature and pressure relief valve is installed into the marked port (upper right). We recom-
mend a WATTS 100XL-4 valve or equivalent for 100,000 BTU models, 40XL5 valve or equivalent for
130,000 BTU models or above input, meeting the requirements for relief valves for hot water heaters
as per ANSI Z21.22B by a nationally recognized lab that maintains a periodic inspection of produc-
tion of such listed safety device. The pressure rating of the valve must not exceed the listed work-
ing pressure of this appliance, and must be rated to the proper BTU/hr capacity of the water heater.
Do not, under any circumstances, thread a cap or plug into the relief valve! Explosion, serious injury
or death may result! Relief valve piping must be directed to the floor or to an open drain, but not
connected directly. There must be a 6" space between the outlet of relief valve piping and drain or
floor. Do not hook up to drain system directly without an air space. The relief valve must be period-
ically checked for proper operation.
J. POTABLE EXPANSION TANK
A potable hot water expansion tank is required to offset the water expansion as the water is heated.
In most city plumbing systems, the water meter has a no return or back flow device built into the
system to prevent back flowing of water back into city mains. Some local codes require back flow
preventers on all incoming water supplies. The hot water expansion tank must be listed for potable
water use. The expansion tank should be located on the cold inlet piping close to the water heater.
nCAUTION
The expansion tank must be suitable for hot potable water.
PART 3: PREPARE WATER HEATER LOCATION (CONTINUED)
nWARNING
Following installation of the T & P Relief Valve, the valve lever MUST be operated AT
LEAST ONCE A YEAR by the water heater owner to ensure that waterways are clear.
Certain naturally occurring mineral deposits may adhere to the valve, blocking waterways,
rendering it inoperative. When the lever is operated, hot water will discharge if the
waterways are clear. PRECAUTIONS MUST BE TAKEN TO AVOID PERSONAL INJURY
FROM CONTACT WITH HOT WATER AND TO AVOID PROPERTY DAMAGE. BEFORE
operating lever, check to see that a discharge line is connected to the valve, directing the
flow of hot water from the valve to a proper place of disposal. If no water flows when the
lever is operated, replacement of the valve is required. TURN THE WATER HEATER “OFF”
AND CALL A PLUMBER IMMEDIATELY.
This device is designed for emergency safety relief and shall not be used as an operating
control. A relief valve functions, in an emergency, by discharging water. Therefore, it is
essential that a discharge line be piped from the valve in order to carry the overflow to a
safe place of disposal. The discharge line must be same size as the valve outlet must pitch
downward from the valve and terminate at least 6" above a drain where any discharge
will be clearly visible.

11
PREPARATION
K. WATER PIPING
The domestic water connections must be installed in accordance to all local and national plumbing
codes, or any applicable standard which prevails. The inlet and outlet ports of the Phoenix are 1" on
55 gallon models. On the 80 and 119 gallon models, the inlet and outlet ports are 1 ½". On the cold
inlet, (bottom left), install a 1" brass tee on 55 gallon models, or a 1 ½" tee on 80 and 119 gallon mod-
els. On the run of the 1" brass tee, install with pipe sealant compound, a 1" brass drain cock or equiv-
alent. Into the branch of the 1" or a 1 ½" brass tee, install a copper male adapter to match your cop-
per plumbing system. For convenience, you may install a sweat shut off valve and a union in the cold
inlet piping to ease servicing in the future. If there is a back flow preventer, or any type of a no return
valve in the system, then you must install an additional tee here for a suitable potable hot water
expansion tank. In the hot outlet, (top left), install a suitable adapter to match the copper tubing of
the plumbing system. A thermal trap or heat trap loop may be installed here, to provide additional
energy savings and prevent the thermal siphoning of domestic hot water.
L. AUXILIARY CONNECTIONS
The auxiliary connections are additional connections for an air handlers, plate exchangers or other
devices that supply hot water. These connections must be installed in accordance with all local and
national codes or any applicable standard that prevails. The auxiliary connections are 1" on all
Phoenix Models. Never use dielectric unions or galvanized steel fittings. Use only copper or brass
fittings. Teflon Sealant must be used on all connections. The top port is the supply outlet and the
bottom port is the return inlet.
nWARNING
Never connect auxiliary connections to any system that uses glycol or other solutions
formulated for hydronic systems. These auxiliary connections are to be used only in a
potable water system. Failure to follow this warning could result in death or serious
injury.
PART 3: PREPARE WATER HEATER LOCATION (CONTINUED)
nCAUTION
NEVER USE DIELECTRIC UNIONS OR GALVANIZED STEEL FITTINGS ON ANY
DOMESTIC WATER CONNECTIONS OR AUXILIARY CONNECTIONS. USE ONLY
COPPER OR BRASS FITTINGS. TEFLON THREAD SEALANT MUST BE USED ON ALL
CONNECTIONS.

12
PREPARATION
MAX
8.00"
COLD IN
VALVE
SPARCO AQUAMIX SHOWN.
TANK
PHOENIX WITH AIR HANDLER
PREVENTER
EXPANSION
INLET
VALVE MANUFACTURER
COLD WATER
HOT WATER OUTLET
NOTES:
DRAIN
must install a spring check valve)
FOR OTHER VALVES, CONSULT
GAS
AUXILIARY
CONNECTION
WITHOUT a check valve, you
HOT OUT
BACKFLOW
BALL VALVE
CIRCULATOR WITH
INTREGAL CHECK VALVE
(if you are installing a circulator
AUXILIARY
CONNECTION
1. Minimum pipe size should match connection size on Phoenix. If you require greater flow, upsize the pipe accordingly.
2. A Thermal Expansion tank suitable for potable water must be sized and installed within this piping system between th
e
backflow preventer and the cold water inlet of the Phoenix.
3. Gas line must be rated to the maximum input capacity of the unit. Unit must have 10 feet of pipe after gas regulator.
4. All circulators shall have an integral flow check.
AIR HANDLER UNITS
MOUNTED TO CEILING*
*CHECK WITH AIR HANDLER MANUFACTURER
FOR PROPER SIZING.
LP-179-L
7/13/07
PHOENIX WITH AIR HANDLERS ABOVE
NOTE: This drawing is meant to show system piping only. The installer is responsible for all
equipment and detailing required by local codes.

13
PREPARATION
MAX.
8.00"
OUTLET
VALVE
HOT WATER
TO 140
135
AUXILIARY
CONNECTION
PREVENTER
EXPANSION
BACKFLOW
AUXILIARY
CONNECTION
COLD WATER
INLET
COLD IN
BALL VALVE
DRAIN
VALVE MANUFACTURER
HOT OUT
AIR HANDLER*
FOR OTHER VALVES, CONSULT
GAS
TO 130120
TANK
SPARCO AQUAMIX
MIXING VALVE SHOWN.
*CHECKWITH AIR HANDLER
MANUFACTURER FOR PROPER
SIZING.
CIRCULATOR
( REQUIRED IN-LINE IF NOT ON
AIR HANDLER UNIT)
( SEE NOTE 4)
NOTES:
4. All circulators shall have an integral flow check.
3. Gas line must be rated to the maximum input capacity of the unit. Unit must have 10 feet of pipe after gas regulator.
1. Minimum pipe size should match connection size on Phoenix. If you require greater flow, upsize the pipe accordingly.
2. A Thermal Expansion tank suitable for potable water must be sized and installed within this piping system between the
check valve and the cold water inlet of the Phoenix.
LP-179-M
4/13/07
PHOENIX WITH AIR HANDLER ON SIDE
NOTE: This drawing is meant to show system piping only. The installer is responsible for all
equipment and detailing required by local codes.

14
PREPARATION
CONNECTION
COLD
EXPANSION
COLD WATER
CHECK
HOT WATER
VALVE
GAS
HOT WATER
INLET
PREVENTER
BACKFLOW
TANK
HOT WATER
BALL VALVE
SHUT-OFF
HOT WATER
AUXILIARY
OUTLET
COLD WATER
COLD WATER
GAS
AUXILIARY
CONNECTION
GAS
CIRCULATOR
(SEE NOTE 4)
LP-179-N
7/16/07
NOTE: This drawing is meant to show system piping
only. The installer is responsible for all
equipment and detailing required by local codes.
REVERSE MANIFOLD AND PIPING DIAGRAM FOR PHOENIX
NOTES:
1. Minimum pipe size should match
connection size on Phoenix. If
you require greater flow, upsize
the pipe accordingly.
2. A Thermal Expansion tank
suitable for potable water must
be sized and installed within this
piping system between the
check valve and the cold water
inlet of the Phoenix.
Check with the Manufacturer of
the Thermal Expansion tank for
proper sizing.
3. Gas Line must be rated to the
maximum input capacity of the
unit. Unit must have 10 feet of
pipe after gas regulator.
4. All circulators shall have an
integral flow check.
NOTE: This drawing is meant to show system piping only. The installer is responsible for all
equipment and detailing required by local codes.
VALVE
BACKFLOW
PREVENTER
VALVE
PURGE
PLATE
BRAZED
CLOSED LOOP RADIANT HEATING
AIR
ELIMINATOR
BALL
VALVE
AUXILIARY
GAUGE
PRESSURE
RADIANT
HEAT
VALVE
BALL
CONNECTION
PRESSURE REDUCING
VALVE
BALL
TANK
EXPANSION
WATER
MAKE-UP
VALVE
BALL
AUXILIARY
CONNECTION
SYSTEM
DRAIN
CIRCULATOR
( see note 4)
CIRCULATOR
(See note 4)
LP-179-U
7/13/07
CLOSED LOOP RADIANT HEATING
NOTES:
1. Minimum pipe size should
match connection size
on Phoenix. If you require
greater flow, upsize the
pipe accordingly.
2. A Thermal Expansion
tank suitable for potable
water must be sized and
installed within this piping
system between the
check valve and the
cold water inlet of the
Phoenix.
3. Gas Line must be rated
to the maximum input
capacity of the unit. Unit
must have 10 feet of
pipe after gas regulator.
4. All circulators shall have
an integral flow check.

15
PREPARATION
NOTES:
GAS
COLD IN
1. Minimum pipe size should match connection size on Phoenix. If you require greater flow, upsize the pipe accordingly.
2. A Thermal Expansion tank suitable for potable water must be sized and installed within this piping system between the
check valve and the cold water inlet of the Phoenix.
Check with the Manufacturer of the Thermal Expansion Tank for proper sizing.
3. Gas line must be rated to the maximum input capacity of the unit. Unit must have 10 feet of pipe after gas regulator.
4. All circulators shall have an integral flow check
SPECIAL NOTE:
Drains and Check valve connected between the Phoenix and the Storage Tank will assist in purging air from system.
BALL VALVE
COLD WATER
SHUT-OFF
OUTLET
CONNECTION
INLET
BACKFLOW
HOT WATER
PREVENTER
AUXILIARY
TANK
EXPANSION
CONNECTION
HOT OUT
PHOENIX WITH STORAGE TANK
AUXILIARY
SPRING CHECK
CONTROL
VALVE
AQUASTAT
DRAIN VALVE
CIRCULATOR
(see note 4)
LP-179-O
7/13/07
NOTE: This drawing is meant to show system piping only. The installer is responsible for all
equipment and detailing required by local codes.
PHOENIX WITH STORAGE TANK

16
PREPARATION
RETURN
SOLAR PANEL
CIRCULATOR
GAUGE
FOR SOLAR SENSOR
DRY WELL
LINE
EXHAUST VENT
INTAKE AIR
AIR VENT
BALL
VALVE
BACKFLOW
LINE
VALVE MANUFACTURER.
DRAIN VALVE
TEMP/PRESSURE
EXPANSION
PREVENTER
SOLAR
(see note 4)
DRAIN
COLD WATER
MIXING VALVE SHOWN.
CLOSED LOOP
RELIEF VALVE
VENT
OUTLET
MANUAL
FOR OTHER VALVES, CONSULT
PANEL
TANK
COLD IN
AUXILIARY
HOT WATER
VALVE
HOT OUT
CONNECTION
AUXILIARY
CONNECTION
TANK
RE-CIRCULATED
CONDENSATE
SUPPLY
GAS
EXPANSION
INLET
TEMP/PRESSURE
SOLAR PANEL
SPARCO AQUAMIX
EXPANSION
CONDENSATE
AUXILIARY
TEMP/PRESSUR
E
FOR OTHER VALVES, CONSULT
CONNECTION
LINE
VALVE MANUFACTURER.
MANUFACTURER FOR PROPER SIZING
BALL
INTAKE AIR
TANK
COLD IN
SOLAR
PANEL
RELIEF VALVE
AIR
RE-CIRCULATED
GAS
(see note 4)
CIRCULATOR
HOT WATER
HOT OUT
COLD WATER
INLET
AIR VENT
AUXILIARY
CONNECTION
SOLAR PANEL
RETURN
SOLAR PANEL
SUPPLY
GAUGE
TEMP/PRESSURE
HANDLER *
VALVE
VENT
EXHAUST VENT
MANUAL
OUTLET
CLOSED LOOP
PREVENTER
VALVE
BACKFLOW
DRAIN VALVE
DRY WELL
FOR SOLAR SENSOR
TANK
EXPANSION
( see note 4)
CIRCULATOR
DRAIN
LINE
SPARCO AQUAMIX
MIXING VALVE SHOWN.
*CHECK WITH AIR HANDLER
PHOENIX SOLAR PIPING WITH AIR HANDLER
PHOENIX SOLAR PIPING
NOTES:
1. Minimum pipe size should match connection size on Phoenix. If you require greater flow, upsize the pipe accordingly.
2. A Thermal Expansion tank suitable for potable water must be sized and installed within this piping system between the check
valve and the cold water inlet of the Phoenix.
3. Gas Line must be rated to the maximum input capacity of the unit. Unit must have 10 feet of pipe after gas regulator.
4. All circulators shall have an integral flow check.
NOTES:
1. Minimum pipe size should match connection size on Phoenix. If you require greater flow, upsize the pipe accordingly.
2. A Thermal Expansion tank suitable for potable water must be sized and installed within this piping system between the check
valve and the cold water inlet of the Phoenix.
3. Gas Line must be rated to the maximum input capacity of the unit. Unit must have 10 feet of pipe after gas regulator.
4. All circulators shall have an integral flow check.
LP-201-A
7/16/07
LP-179-R
7/16/07

17
PART 4: PREPARE WATER HEATER
A. ELECTRICAL CONNECTION
The electrical connection for the Phoenix is on the right side of the combustion shroud with a line
cord for electrical connection. All electrical wiring must be performed by a qualified licensed elec-
trician and in accordance with National Electrical Code or to the applicable local codes and stan-
dards. The electrical requirements are for standard 120 volts, 60 Hz 15 amp dedicated service.
B. GAS CONNECTION
The gas supply shall have a maximum inlet pres-
sure of less than 14" water column (350 mm), ½
pound pressure (3.5 kPa), and a minimum of 3.5"
water column. The entire piping system, gas
meter and regulator must be sized properly to
prevent pressure drop greater than 0.5" WC as
stated in the National Fuel Gas Code. This infor-
mation is listed on the rating plate. It is very
important that you are connected to the type of
gas as noted on the rating plate. "LP" for liquefied
petroleum, propane gas or, "Nat" natural or city
gas. All gas connections must be approved by
the local gas supplier, or utility in addition to the
governing authority, prior to turning the gas sup-
ply on. Do not remove this adaptor! It is manda-
tory that this fitting is used for connection to a
field fabricated drip leg as shown in the illustra-
tion at right per the National Fuel Gas Code. You
must ensure that the entire gas line to the con-
nection at the Phoenix Water Heater is no smaller
than ¾". Once all the inspections have been performed, the piping must be leak tested. If the leak
test requirement is a higher test pressure than the maximum gas inlet pressure, you must isolate the
Phoenix from the gas line to continue leak testing. In order to do this, you must turn off the factory
and field-installed gas cocks. This will minimize the possibility of damaging the Phoenix gas valve.
Failure to do so may damage the gas valve. In the event the gas valve is exposed to a pressure
greater than ½ PSI, 14" water column, the gas valve must be replaced. Never use an open flame
(match, lighter, etc.) to check gas connections.
C. GAS PIPING
1. Run the gas supply line in accordance with all applicable codes.
2. Locate and install manual shutoff valves in accordance with state and local requirements.
PREPARATION
UNION
DRIP LEG
MIN 3/4"
nWARNING
Failure to follow all precautions could result in fire, explosion or death!
nWARNING
It is of extreme importance that this unit be properly grounded. It is very important that the
building system ground is inspected by a qualified electrician, prior to making this connection.
It is very important that the electrical power is only turned on when the Phoenix is completely
filled with cold water.
Fig. 4-1

18
PREPARATION
PART 4: PREPARE WATER HEATER (CONTINUED)
D. GAS TABLE
Refer to the below table to size the supply piping to minimize pressure drop between meter or
regulator and unit.
Maximum Capacity of Pipe in Cubic Feet of Gas per Hour for Gas Pressures of 0.5 psi or Less and a
Pressure Drop of 0.3 Inch water Column
Gas Table
It is recommended that a soapy solution be used to detect leaks. Bubbles will appear on the pipe to
indicate a leak is present. The gas piping must be sized for the proper flow and length of pipe, to avoid
excessive pressure drop. Both the gas meter and the gas regulator must be properly sized for the total
gas load. If you experience a pressure drop greater than 1" WC, the meter, regulator or gas line is
undersized or in need of service. You can attach a manometer to the incoming gas drip leg, by
removing the cap and installing the manometer. The gas pressure must remain between 3.5" WC and
14" WC during stand-by (static) mode and while in operating (dynamic) mode at full output. If an in-
line regulator is used, it must be a minimum of 10 feet from the Phoenix. It is very important that
the gas line is properly purged by the gas supplier or utility. Failure to properly purge the lines or
improper line sizing, will result in ignition failure. This problem is especially noticeable in NEW LP
installations and also in empty tank situations. This can also occur when a utility company shuts off
service to an area to provide maintenance to their lines. The gas valve must not be replaced with a
conventional gas valve under any circumstances. As an additional safety feature in the Phoenix water
heater, the gas valve in this appliance has a flanged connection to the swirl plate and blower.
(Nominal
Iron Pipe Internal Length of Pipe (Feet)
Size Diameter
(inches) (inches) 10 20 30 40 50 60 70 80 90 100 125 150 175 200
3/4 .824 278 190 152 130 115 105 96 90 84 79 72 64 59 55 BTU'S
1 1.049 520 350 285 245 215 195 180 170 160 150 130 120 110 100 PER
1 1/4 1.380 1,050 730 590 500 440 400 370 350 320 305 275 250 225 210
}
HOUR
1 1/2 1.610 1,600 1,100 890 760 670 610 560 530 490 460 410 380 350 320 x1,000

19
PREPARATION / VENTING
PART 4: PREPARE WATER HEATER (CONTINUED)
E. DUNGS GAS VALVE
PART 5: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL
A. INSTALLING EXHAUST VENT AND INTAKE AIR VENT
GAS VALVE
PRESSURE TAP INLET
settings.
or attempt to make any adjustment
analyzer.
: Do not remove this screwCAUTION
OFFSET ADJUSTMENT
to this screw without a combustion
PRESSURE TAP OUTLET
correspond to the chart in combustion
THROTTLE ADJUSTER
NOTE: If for any reason the throttle
needs to be adjusted, it is very
important that a "COMBUSTION
ANALYZER" be used to ensure safe
and proper operation. Turn the
adjuster to the (+) to increase the gas
supply or the (-) to decrease the gas
supply. This adjustment will affect
CO/CO% levels. Make sure the levels
GAS SHUT-OFF
VALVE
COMBUSTION
AIR
nDANGER
The Phoenix must be vented as detailed in Venting section. Ensure the exhaust and intake
piping comply with these instructions regarding vent system.
Inspect finished combustion air intake and exhaust piping thoroughly to ensure all joints are
well secured and airtight and comply with all applicable code requirements, as well as with
the instructions provided in this manual.
Failure to provide a properly installed vent system will cause severe personal injury or death.
Fig. 4-2
LP-179-P
3/13/07
nWARNING
Do not do a gas conversion on this water heater without an officially approved
conversion kit and instructions supplied by Heat Transfer Products, Inc.