Trane TR250 User manual

SERVICE & INSTALLATION MANUAL FOR TR250 & TR400
MODEL POOL AND SPA/HOT TUB HEATERS
1301150301 Rev B 1015
See www.hayward-pool.com/patent for U.S. and
Canadian patent information
WHAT TO DO IFYOU 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 per-
formed by a qualified installer, service
agency, or the gas supplier.
FOR YOUR SAFETY
WARNING: If the information in these instructions
is not followed exactly, a fire or explosion may result
causing property damage, injury, or death.
Do not store or use gasoline or other flammable vapors or
liquids in the vicinity of this or any other appliance.
This product must be installed and serviced by authorized
personnel, qualified in pool/spa heater installation. Im-
proper installation and/or operation can create carbon
monoxide gas and flue gases that can cause serious injury,
property damage, or death.

2CONTENTS
Safety Information..............................................3
Section I General information ...........................7
Introduction ....................................................7
Warranty ........................................................7
Maintaining proper water chemistry ...............7
Section II Installation .........................................9
Equipment inspection ....................................9
Important notice .............................................9
Conformance with codes ...............................9
Altitude of installation .....................................9
Uncrating the heater ....................................11
Locating the heater.......................................11
Flooring ........................................................13
Tie-Down Brackets .......................................13
Indoor Installation and Venting.....................14
Clearances ...................................................14
Air Supply.....................................................14
Vertical Venting.............................................16
Horizontal or Vertical Venting .......................17
Reversible water connections ......................19
Gas supply and piping .................................21
Water piping .................................................24
Installation above pool surface ....................26
Chlorinator/chemical feeder .........................26
Pressure relief valve ....................................27
Electrical specifications ................................27
Electrical connections ..................................28
Remote control connection ..........................29
Section III Check-out & Start-up .....................32
General ........................................................32
Gas line testing ............................................32
Gas pressure testing ...................................33
Water pressure switch .................................35
Two-speed pump .........................................35
Temperature adjustment ..............................36
Temperature lock-out ...................................37
Fahrenheit v. Celsius ...................................37
Heating mode ..............................................37
Retry (Failure of light) ..................................38
Recycle (Loss of flame) ...............................38
Keypad inputs ..............................................38
Automatic reset time ....................................39
Periodic inspection ......................................39
Winterization ................................................39
Draining the heat exchanger .......................40
Spring start-up .............................................40
Section IV Technician Service ........................41
General ........................................................41
Maintenance ................................................41
Heat exchanger inspection and cleaning .....41
Combustion chamber ..................................42
Burner inspection and cleaning ...................42
Burner removal and replacement ................42
Gas valve replacement ................................43
Igniter ...........................................................43
Flame sensor ...............................................44
Burner orifices .............................................44
Gas conversion ............................................44
Electrical wiring ............................................44
Ignition control system .................................44
Blower vacuum switch..................................45
High limit switch ...........................................45
Exhuast Gas Temperature Limit...................46
Thermistor ....................................................46
Water pressure switch .................................46
Transformer .................................................47
Blower ..........................................................47
By-pass service cartridge ............................48
Section V Troubleshooting .............................49
General ........................................................49
Automatic reset time ....................................49
Supply wiring ...............................................49
Internal wiring ..............................................49
Fuse specifications ......................................50
Error codes...................................................51
Troubleshooting ...........................................53
Warranty.......................................................59
Service Parts................................................61
Specifications ...............................................65

3
SAFETY INFORMATION
Basic safety precautions should always be followed, including the following: Failure to follow instructions
can cause severe injury and/or death.
This is the safety-alert symbol. When you see this symbol on your equipment or in this manual, look
for one of the following signal words and be alert to the potential for personal injury.
WARNING warns about hazards that could cause serious personal injury, death or major property
damage and if ignored presents a potential hazard.
CAUTION warns about hazards that will or can cause minor or moderate personal injury and/or
property damage and if ignored presents a potential hazard. It can also make consumers aware of
actions that are unpredictable and unsafe.
ATTENTION indicates special instructions that are important but not related to hazards.
READ AND FOLLOW ALL INSTRUCTIONS IN THIS OWNER’S
MANUAL AND ON EQUIPMENT.
IMPORTANT SAFETY INSTRUCTIONS
Before installing or servicing this electrical equipment, turn power supply OFF.
KEEP SAFETY LABELS IN GOOD CONDITION AND REPLACE IF MISSING OR DAMAGED.
WARNING – To reduce risk of injury, do not permit children to use or climb on the heater, pumps or
filters. Closely supervise children at all times. Components such as the filtration system, pumps, and
heaters must be positioned to prevent children from using them as a means of access to the pool.
CAUTION – This heater is intended for use on permanently installed swimming pools and may also
be used with spas. Do NOT use with storable pools.A permanently installed pool is constructed in or
on the ground or in a building such that it cannot be readily disassembled for storage. A storable pool is
constructed so that it is capable of being readily disassembled for storage and reassembled to its origi-
nal integrity.
Though this product is designed for outdoor use, it is strongly recommended to protect the electrical
components from the weather. Select a well drained area, one that will not flood when it rains. It requires free
circulation of air for cooling. Do not install in a damp or non-ventilated location.
WARNING – It is required that licensed electricians do all electrical wiring. Risk of
Electric Shock. Hazardous voltage can shock, burn, cause death or serious property
damage. To reduce the risk of electric shock, do NOT use an extension cord to connect
unit to electric supply. Provide a properly located outlet. All electrical wiring MUST be
in conformance with applicable local and national codes and regulations. Before
working on this unit, turn off power supply to the heater.
WARNING – To reduce the risk of electric shock replace damaged wiring immediately. Locate conduit
to prevent abuse from lawn mowers, hedge trimmers and other equipment.
WARNING – Failure to bond to pool structure will increase risk for electrocution and could result in
injury or death. To reduce the risk of electric shock, the electrician must comply with installation
instructions and must bond the heater accordingly. In addition, the licensed electrician must also con-
form to local electrical codes for bonding requirements.

4
NOTES TO THE ELECTRICIAN:
Use a solid copper conductor, size 8 or larger. Run a continuous wire from external bonding lug to rein-
forcing rod or mesh. Connect a No. 8 AWG solid copper bonding wire to the grounding lug provided on the
heater and to all metal parts of swimming pool or spa, and to all electrical equipment, metal piping (except
gas piping), and conduit within 5 ft. (1.5 m) of inside walls of swimming pool or spa. IMPORTANT -Refer-
ence NEC codes for all wiring standards including, but not limited to, grounding, bonding and other general
wiring procedures.
WARNING – Suction Entrapment Hazard.
Suction in suction outlets and/or suction outlet covers which are damaged, broken,
cracked, missing, or unsecured can cause severe injury and/or death due to the fol-
lowing entrapment hazards:
Hair Entrapment- Hair can become entangled in suction outlets.
Limb Entrapment- A limb inserted into an opening of a suction outlet or suction outlet
cover that is damaged, broken, cracked, missing, or not securely attached can result in a
mechanical bind or swelling of the limb.
Body Suction Entrapment- A differential pressure applied to a large portion of the body or limbs can
result in an entrapment.
Evisceration/ Disembowelment - A vacuum applied directly to the intestines through an unprotected
suction outlet sump or suction outlet cover which is damaged, broken, cracked, missing, or unsecured
can result in evisceration (disembowelment).
Mechanical Entrapment- There is potential for jewelry, swimsuit, hair decorations, finger, toe or knuck-
le to be caught in an opening of a suction outlet or suction outlet cover resulting in mechanical entrap-
ment.
WARNING - To reduce the risk of entrapment hazards:
• When suction outlets are less than a 18” x 23” equivalent, a minimum of two
functioning suction outlets per pump must be installed. Suction outlets in the same
plane (i.e. floor or wall), must be installed a minimum of three feet (3’) [1 meter]
apart, as measured from near point to near point.
• Dual suction outlets shall be placed in such locations and distances to avoid “dual
blockage” by a user.
• Dual suction fittings shall not be located on seating areas or on the backrest for
such seating areas.
• The maximum system flow rate shall not exceed the flow rating of any listed (per current revision of
ASME/ANSI A112.19.8) suction outlet cover installed.
• Never use the Pool or Spa if any suction outlet component is damaged, broken, cracked, missing, or not
securely attached.
• Replace damaged, broken, cracked, missing, or not securely attached suction outlet components imme-
diately.
• Install two or more suction outlets per pump in accordance with latest APSP (formally NSPI) Standards
and CPSC guidelines. Follow all applicable National, State, and Local codes.

5
WARNING – Failure to remove pressure test plugs and/or plugs used in winterization of the pool/spa
from the suction outlets can result in an increase potential for suction entrapment as described above.
WARNING – Failure to keep suction outlet components clear of debris, such as leaves, dirt, hair, paper
and other material can result in an increase potential for suction entrapment as described above.
WARNING – Suction outlet components have a finite life, the cover/grate should be inspected fre-
quently and replaced at least every ten years or if found to be damaged, broken, cracked, missing, or
not securely attached.
WARNING – All suction and discharge valves MUST be OPEN when starting the circulation system.
Failure to do so could result in severe personal injury and/or property damage. All drains and suction
outlets MUST have properly installed covers, securely attached using the screws supplied with the
covers. If screws are lost, order replacement parts from your supplier.
WARNING – Hazardous Pressure. Pool and spa water circulation systems operate
under hazardous pressure during start up, normal operation, and after pump shut off.
Stand clear of circulation system equipment during start up. Failure to follow safety
and operation instructions could result in violent separation of the pump housing and
cover due to pressure in the system, which could cause property damage, severe
personal injury, or death. Before servicing pool and spa water circulation system, all
system and pump controls must be in off position and filter manual air relief valve
must be in open position. Before starting system pump, all system valves must be set
in a position to allow system water to return back to the pool. Do not change filter
control valve position while system pump is running. Before starting system pump,
fully open filter manual air relief valve. Do not close filter manual air relief valve
until a steady stream of water (not air or air and water) is discharged.
WARNING – Separation Hazard. Failure to follow safety and operation instruc-
tions could result in violent separation of pump components. Strainer cover must be
properly secured to pump housing with strainer cover lock ring. Before servicing
pool and spa circulation system, manual air relief valve must be in open position. Do
not operate pool and spa circulation system if a system component is not assembled
properly, damaged, or missing. Do not operate pool and spa circulation system
unless filter air relief valve body is in locked position in filter upper body.
WARNING – Never operate or test the circulation system at more than 40 PSI.
WARNING – Fire and burn hazard. Motors operate at high temperatures and if they are not properly
isolated from any flammable structures or foreign debris they can cause fires, which may cause severe
personal injury or death. It is also necessary to allow the motor to cool for at least 20 minutes prior to
maintenance to minimize the risk of burns.
WARNING – Failure to install according to defined instructions may result in severe personal injury or
death.

6
WARNING – The following “Safety Rules for Hot Tubs” recommended by the U.S. Consumer
Product Safety Commission should be observed when using the spa.
1. Spa or hot tub water temperatures should never exceed 104°F [40°C]. A temperature of 100°F [38°C]
is considered safe for a healthy adult. Special caution is suggested for young children. Prolonged im-
mersion in hot water can induce hyperthermia.
2. Drinking of alcoholic beverages before or during spa or hot tub use can cause drowsiness, which could
lead to unconsciousness and subsequently result in drowning.
3. Pregnant women beware! Soaking in water above 100°F [38°C] can cause fetal damage during the
first three months of pregnancy (resulting in the birth of a brain-damaged or deformed child). Pregnant
women should adhere to the 100°F [38°C] maximum rule.
4. Before entering the spa or hot tub, users should check the water temperature with an accurate ther-
mometer; spa or hot tub thermostats may err in regulating water temperatures by as much as 4°F
(2.2°C).
5. Persons taking medications, which induce drowsiness, such as tranquilizers, antihistamines or antico-
agulants, should not use spas or hot tubs.
6. If the pool/spa is used for therapy, it should be done with the advice of a physician. Always stir pool/
spa water before entering the pool/spa to mix in any hot surface layer of water that might exceed
healthful temperature limits and cause injury. Do not tamper with controls, because scalding can result
if safety controls are not in proper working order.
7. Persons with a medical history of heart disease, circulatory problems, diabetes or blood pressure prob-
lems should obtain a physicians advice before using spas or hot tubs.
8. Hyperthermia occurs when the internal temperature of the body reaches a level several degrees above
normal body temperature of 98.6°F [37°C]. The symptoms of Hyperthermia include: drowsiness, leth-
argy, dizziness, fainting, and an increase in the internal temperature of the body.
The effects of Hyperthermia include:
1. Unawareness of impending danger.
2. Failure to perceive heat.
3. Failure to recognize the need to leave the spa.
4. Physical inability to exit the spa.
5. Fetal damage in pregnant women.
6. Unconsciousness resulting in danger of drowning.
DEFINITIONS:
Suction Outlet – The term Suction Outlet is a fitting, fitting assembly, cover/grate and related
components that provide a means for water to exit the pool and into the pump
circulating system.
Inches of Mercury (in Hg) - A unit for measuring pressure below atmospheric (“suction” or “vacuum”) (1.0
inch Hg = .491 PSI)
Main Drain – See Suction Outlet
PSI – An abbreviation for pounds per square inch.

7
INTRODUCTION:
This manual contains instructions for installation, operation, maintenance, troubleshooting, and parts lists
for the safe use of the swimming pool/spa/hot tub heaters. The manufacturer strongly recommends that the
installer read the manual before installing the swimming pool/spa/hot tub heater. If after reviewing the manu-
al any questions remain unanswered, contact the factory or local representative. Following heater installation,
the installer should leave all manuals with the consumer for future reference.
LIMITED WARRANTY SUMMARY:
The manufacturer warrants the pool/spa/hot tub heater to be free from defects in materials and workman-
ship, and will within one year from date of installation for all users, for the original purchaser, repair or, at our
option, replace without charge any defective part. The manufacturer further warrants that if the heat exchang-
er or exchanger headers (water-containing section) leak within one year from date of such installation for all
users, due to defects in materials and workmanship, replacement parts will be provided by the manufacturer.
Cost of freight, installation, fuel, and service labor (after one year) is at user’s expense. For full details of
warranty agreement, see warranty certificate included in this manual.
ATTENTION: If the pool/spa/hot tub heater is damaged or destroyed by improper maintenance, exces-
sive water hardness, incorrect water chemistry, or freezing it is not covered under the manufacturer’s
warranty.
MAINTAINING PROPER WATER CHEMISTRY:
WARNING: Failure to maintain proper water chemistry may cause premature
heat exchanger damage or failure.
The heat exchanger in your Trane pool heater is made from the highest quality of copper and nickel (Cu-
pronickel) materials. The premium materials and the exacting processes used in the manufacture of the heat
exchanger is state of the art in pool heater design and manufacture. Yet, it remains vital that the heat exchang-
er be protected from damaging or corrosive chemicals, insufficient water flow or improperly balanced water
chemistry. Heat exchanger damage or failure resulting from improper flow, improperly balanced pool water
or the improper addition of sanitizers into the water is NOT covered under the terms of your warranty.
The following factors are critical to heat exchanger protection. Follow these guidelines to help prevent
pre-mature damage or failure to your heater and heat exchanger.
1. WATER FLOW THROUGH HEATER
Water must be flowing through the heater at the minimum rated flow rate during operation. Check that
the pump is operating and the system is filled with water and purged of all air prior to starting the heater. The
minimum rated flow rates are listed on page 25. Some installations may require an adjustment to the water
pressure switch for proper low-flow protection. Test your system and if necessary, adjust the water pressure-
switch as described on page 35.
2. POOL/SPA WATER CHEMISTRY
The chemistry balance and mineral content of swimming pool water changes daily due to the addition of
pool and sanitizing chemicals, bather loads, rain, runoff and the amount of sun - to name a few. Improper chem-
istry balance and mineral content can cause scaling and deposits to form on pool walls, in the filtration system,
in the heat exchanger tubes and additionally can promote corrosive action to all metals in the water path. Chang-
SECTION I. GENERAL INFORMATION

8
ing spa water regularly and maintaining the correct chemical balance in your pool/spa will keep the pool/spa
safe and sanitary, and will help protect the heat exchanger. Use a 4-way pool/spa water test kit to check your
water frequently (at least weekly). Use the following guidelines to help protect your heater’s heat exchanger:
3. SKIMMER CHLORINATION
Placing chlorine or bromine tablets directly into the skimmer may result in high chemical concentrations
flowing through the heater. DO NOT place chlorine or bromine tablets in the skimmer.
4. CHLORINATOR INSTALLATION
Chlorinators must be installed downstream of the heater, and a check valve must be installed between the
heater and chlorinator to prevent high chemical concentrations from back flowing into the heater. Make sure your
piping arrangement meets the chlorinator installation requirements shown on page 26.
5. BYPASS
Until water chemistry is properly balanced, and if your piping has a bypass valve installed for the heater,
open the bypass so that corrosive and potentially damaging water will not flow through the heater and there-
fore the heat exchanger. Close the bypass valve once the water is properly balanced. Failure to close the
bypass valve when attempting to operate the heater will result in extensive damage to the heat exchanger.
Ensure water flow through the heater is restored before operating the heater. A bypass feature is also advanta-
geous for service needs and for the ability to remove the heater from the water path when not heating. Refer
to page 25 for further information.
Recommended
Level
Effect of Low Levels Effect of High Levels
Chlorine 1 - 3 ppm
Bromine 2 - 4 ppm
pH 7.4 - 7.6
corrosive to heat exchanger,
swimmer irritation
cloudy water, scaling of heat exchanger,
reduced sanitizer effectiveness
Total Alkalinity 80 - 120 ppm
corrosive to heat exchanger,
large fluctuations in pH
scaling of heat exchanger
Calcium Hardness 200 - 400 ppm corrosive to heat exchanger scaling of heat exchanger
Salt 2700 - 5000 ppm poor salt chlorinator performance corrosive to heat exchanger
hazy water, algea growth,
bacteria causing infections
swimmer irritation, bleaching of clothes/hair,
corrosive to heat exchanger

9
EQUIPMENT INSPECTION:
On receipt of the heater, inspect the heater carton(s) for damage. If any carton(s) is damaged, note it when
signing for it. Remove the heater from the carton(s) inspect it and advise the carrier of any damages at once.
IMPORTANT NOTICE:
The installation instructions are intended for the use of a qualified technician, specifically trained and
experienced in the installation of this type of heating equipment. Some states or provinces require that instal-
lation be licensed. If this is the case in the state or province where heater is located, the contractor must be
properly licensed.
WARNING: Failure to comply with the appliance and vent package installation instructions and service
instructions in this manual may result in equipment damage, fire, asphyxiation, or carbon monoxide
poisoning. Exposure to products of incomplete combustion (carbon monoxide) can cause cancer and
birth defects or other reproductive harm.
CONFORMANCE WITH CODES:
The heater shall be installed in accordance with all local and state codes. The heater installation must con-
form to the latest edition of the National Fuel Gas Code (ANSI Z223.1/NFPA 54) and with the requirements of
the authority having jurisdiction. Design certification of the heater is in compliance withANSI Z21.56/CSA 4.7.
For Canadian installations, the heater is to be installed in accordance with the standards CAN/CGA B149.1
and B149.2 – Installation Codes for Gas Burning Appliances and Equipment and/or local codes and, if appli-
cable, CSA C22.1 – Canadian Electrical Code, Part I.
ALTITUDE OF INSTALLATION:
Heaters may be installed at any altitude up to 10,100 ft above sea level, provided the appropriate
modification(s) are performed. The altitudes which require modification vary depending on the model. Parts
necessary to convert the heater for outdoor installation at altitudes up to 7,700 ft (minimum) are included
with the heater. Conversion is accomplished by replacement of the blower air inlet plate, and for indoor ap-
plications, installation of a special vent pressure switch. The blower air inlet plates are clearly marked with
the compatible heater model(s), vent configuration(s), and altitude range(s). Care should be taken to verify
the correct plate (and vent pressure switch, when applicable) is being used to ensure proper heater perfor-
mance. The vent pressure switch should be provided with the indoor adapter kit, or if you have an older
indoor adapter kit, order p/n FDXLVPS1931 for the high-altitude indoor vent pressure switch.
High-Altitude Conversion Procedure:
1. Identify the altitude of the installation site. This may be done using a GPS device, or by looking up the
altitude for the geographic location. Altitudes for all locations in the United States and Canada may be
found using the zip/postal code database at www.zip-codes.com. If the altitude for the installation site
is greater than 10,100 ft, the heater may not be installed. Note that if installing outdoors, some
Trane heaters may be compatible with your altitude without modification. Table 1 lists the
altitude ranges for heaters without modification. All indoor heaters installed above 2,000 ft require a
special vent pressure switch.
2. Select the appropriate blower air inlet plate to use based on the heater model, vent configuration
(outdoor or indoor), and altitude needed. Extra plate(s) are included with the heater, packaged in the
plastic bag with this manual. Each plate has a label which identifies which model(s), vent
configuration(s), and altitude range(s) it is designed for. Table 1 lists the maximum installation
altitudes using the included conversion plate(s). If installing above 7,700 ft, the high-altitude kit
SECTION II. INSTALLATION

10
FDXLHAK1930 (sold separately) may be necessary.
3. If installing indoors, select the appropriate high-altitude indoor vent pressure switch from the indoor
adapter kit or from the FDXLVPS1931 kit. Each switch has a label which identifies which model(s) and
altitude range(s) it is designed for.
4. If connected, turn pump, main gas valve, and heater power off.
5. Remove heater front access door.
6. Remove the 4 #10 hex head screws that fasten the blower air inlet plate to the blower, and remove the
blower air plate and discard. Save the 4 screws as they will be needed to install the new plate.
See Figure 26 (page 47).
7. Install the appropriate blower plate from the kit using the 4 screws. It may be helpful to drive the screws
in and out of the plate outside of the heater first to “thread” the holes before installing it in the heater.
8. If the installation is configured for indoor venting, a special high-altitude vent pressure switch must be
installed. Follow the instructions for vent kit installation (page 14), but use the appropriate blower air
inlet plate and vent pressure switch for your altitude.
9. Re-install heater front door.
10. If connected, turn pump, main gas valve, and heater power back on.
11. Activate heater and check for proper function.
Table 1 lists the maximum altitudes each model is designed for with: a) no modifications, b) the included
conversion plate installed, and c) the accessory conversion kit FDXLHAK1930 installed (sold separately).
TABLE 1
Heater
Model Fuel
Maximum Installation Altitude
Outdoor Installation Indoor Installation*
No Modifica-
tions to Heater
Included Con-
version Plate
Installed on
Heater
Conversion kit
FDXLHAK1930
Installed on
Heater
No Modifica-
tions to Heater
Included Con-
version Plate
Installed on
Heater
Conversion kit
FDXLHAK1930
Installed on
Heater
TR250NA NAT 5,400 ft 10,100 ft N/A 2,000 ft 10,100 ft N/A
TR250LP LP 2,000 ft 7,700 ft 10,100 ft 2,000 ft 7,700 ft 10,100 ft
TR400NA NAT 10,100 ft N/A N/A 10,100 ft N/A N/A
TR400LP LP 2,000 ft 7,7000 ft 10,100 ft 2,000 ft 7,700 ft 10,100 ft
* All indoor installations at altitudes above 2,000 ft also require a special vent pressure switch to be installed in ad-
dition to the blower air inlet plate. The special vent pressure switch is included with the appropriate indoor vent kit
(UHXNEGVT1xxx or UHXPOSHZ1xxx), or the high-altitude vent pressure switch kit FDXLVPS1931.

11
LOCATING THE HEATER:
Locate the pool/spa/hot tub heater in an area where leakage of the heat exchanger or connections will not
result in damage to the area adjacent to the heater or to the structure. When such locations cannot be avoided,
it is recommended that a suitable drain pan, with drain outlet, be installed under the heater. The pan must not
restrict airflow.
This heater must be installed at least (5) feet from the inside wall of a pool (in-ground or above-ground)/
spa/hot tub unless separated from the pool/spa/hot tub by a solid barrier.
The heater must be installed such that the location of the exhaust gas vent assembly outlet relative to
adjacent public walkways, adjacent buildings, openable windows, and building openings complies with the
National Fuel Gas Code (ANSI Z223.1/NFPA 54) and/or CAN/CGA B149 installation codes. Outdoor instal-
lation and service clearances:
The heater must be installed outdoors such that the installation and service clearances from combustible
materials shown in Table 2 are maintained. This heater may be installed on combustible floors.
1. The heater is self-venting when installed outdoors and does not require additional vent piping.
2. Do not install in a location where growing shrubs may in time obstruct a heater’s combustion air and
venting areas.
3. Do not install this appliance under an overhang less than (3) feet from the top of the appliance. The
area under the overhang must be open on (3) sides.
4. Do not install the heater where water spray from ground sprinkler can contact the heater. The water
could splash on the controls causing electrical damage.
Figure 2: Shipping Screws Inside Front Access Panel
Remove the (2)
shipping screws
and discard bottom
corrugated tray.
The screw through
the rear shipping
bracket is located in
this area. Remove the
screw.
It is not necessary to
remove the bracket
or the rear louvered
panel.
Figure 1: Pallet Mounting Bracket Location
UNCRATING THE HEATER:
To remove the shipping carton from the heater:
1. Remove the corrugated carton from the
heater. The carton, top pad, bottom pad,
and the four corner posts can be recycled.
2. There are three (3) screws total used to
secure the heater to the wood pallet. All
three must be removed to separate the
heater from the pallet. One (1) is located
in the lower rear of the heater as shown in
Figure 1.
3. To access the other two (2) screws, open
the front access panel by remov-
ing the black phillips-head screw.
Then remove the two (2) screws
which hold the heater base pan to
the pallet as shown in Figure 2.
4. Lift the heater clear of the corrugat-
ed bottom pad and off of the pallet.
ATTENTION: Do not drop the
heater from a pickup truck tailgate
to the ground. This may damage the
heater.

12
Table 2
Outdoor Installation Clearances
Heater Panel Required Clearance
Top Unobstructed
Front 24 inches
Back 6 inches
Water Connection Side 12 inches
Side Opposite Water
Connection 6 inches
5. Do not install under a deck.
6. Do not install within 24” of any outdoor
HVAC equipment.
7. Do not install where water may run-off a
roof into the heater. A gutter may be need-
ed to protect the heater.
8. Any enclosure around the heater must
provide a combustion air vent commenc-
ing within 12 inches of the bottom of the
enclosure. The vent opening shall have
a minimum free area of 1 square inch per
4,000 btu/hr input rating of all gas appliances in the enclosure. See Table 5.
9. If the heater is to be installed in front of an exterior wall with with vinyl siding, increase the clearance
from the back of the unit shown in Table 2 to 12 inches.
10. For minimum exhaust vent clearances for all building openings, including but not limited to vented
eaves, doors, windows, or gravity inlets, see Figure 3. In Canada, the heater must be installed with
the top of the vent at least 10 feet (3m) below, or to either side of, any opening into a building.
4ft
Minimum
4ft
Minimum
3ft
Minimum 10 ft
Minimum
4ft
Minimum
Figure 3: Minimum Clearances
Forced Air Inlet

13
FLOORING:
This heater may be installed on either non-combustible or combustible flooring. Ultralite™ or equiva-
lent concrete-over-foam HVAC pads are acceptable.
TIE-DOWN BRACKETS:
The heater is equipped for installation of factory-supplied tie-down brackets if required by local
codes. The brackets are shipped in the consumer kit. You will need the following to complete the installa-
tion:
1. Tie-down brackets (FACTORY-SUPPLIED, quantity = 4)
2. Sheet metal screws (FACTORY-SUPPLIED, quantity = 4)
3. Concrete tapping screws (tapcons) (field-supplied, quantity = 4, size to be ¼” diameter with a
minimum length of 2”)
INSTALLING TIE-DOWN BRACKETS:
1. Locate the tie-down brackets and the sheet
metal screws.
2. Obtain the tap-cons. Be sure the overall
length of the concrete tapping screw is at least
2”.
3. Remove the front access panel (1 screw).
4. Remove the rear access panel (4 screws).
5. Position the heater on the pad so that all
tap-cons can “bite” into the pad. Observe
local codes regarding pad construction, some
jurisdictions specify a minimum thickness for
concrete pads.
6. Slip the tie-down brackets into the slots in
the front of the heater base pan from under-
side of the heater, so that they are positioned
as shown in Figure 4. Install the sheet metal
screws through the holes in the bracket to
secure the bracket to the heater base pan.
7. Install the tap-cons through the holes in the
tie-down brackets into the pad.
8. Repeat Steps 6 & 7 at the rear of the heater.
9. Installation is completed when (4) brackets are secured to the heater and the pad. Install the access
panels when complete.
Equipment pad
Install sheet metal screws (supplied) at
these locations (front and rear)
Install concrete tapping screws (field-supplied)
at these locations (front and rear)
Figure 4: Hurricane Tie-Down Installation

14
INDOOR INSTALLATION AND VENTING:
POSITIVE AND NEGATIVE PRESSURE VENTING SYSTEMS
The heater is designed such that it may be vented using either a negative-pressure or a positive-pressure
venting system. The appropriate system of venting for a particular site will depend on many factors such as
vent termination needs (horizontal/vertical), and the cost of venting system. Table 3 lists the indoor venting
kits available and the limitations of each system. Multipe forced- or induced-draft units should never be vented
uisng common venting or vent terminations.
Table 3
Indoor Vent Kits and Limitations of Venting Systems
Indoor Vent Kit Part
Number Description For Use With
Heater
Models Vent Pipe Limitations Vent Pipe
Material
Vent
Termination
Requirement
UHXNEGVT12501 Indoor Vent Adapter Kit,
Negative Pressure,
Vertical Venting
Applications
TR250 50 ft max vertical height,
25 ft max horizontal length
(horizontal length cannot
exceed 1/2 of vertical height),
3 elbows max
Single or Double
Wall Galvanized
Non-Sealed
Vent Pipe
Vertical Only,
Termination Above
Roof of House/
Building
UHXNEGVT14001 TR400
UHXPOSHZ12502 Indoor Vent Adapter Kit,
Positive Pressure,
Horizontal or Vertical
Venting Applications
TR250 50 ft max with 1 elbow,
40 ft max with 2 elbows,
or 30 ft max with 3 elbows
(horizontal or vertical)
Single or Double
Wall Stainless
Steel Sealed
Vent Pipe
Horizontal or
Vertical, Termina-
tion Immediately
Outside Wall of
House/Building
UHXPOSHZ14002 TR400
CLEARANCES:
The heater must be installed such that the installation and service clearances from combustible materials
shown in Table 4 are maintained. This heater may be installed
on combustible floors. Do not install heater in a closet.
AIR SUPPLY:
Indoor installations and outdoor shelters (confined spaces)
must be provided with adequate combustion and ventilation air
vents to assure proper heater operation. These vents must be
sized according to the requirements stated in paragraph A or B
below (whichever applies to the installation). These vents must
never be obstructed when heater is in operation.
When air blowers are used in spa/hot tub installations and are
located in proximity to the heater, caution must be observed to ensure sufficient combustion air is available to
the heater for proper combustion. A separate blower air duct is recommended.
Table 4
Indoor Installation Clearances
Heater Panel Required Clearance
Top 36 inches
Front 24 inches
Back 6 inches
Water Connection Side 12 inches
Side Opposite Water
Connection 6 inches

15
(A) ALL AIR SUPPLY FROM INSIDE THE BUILDING:
The confined space shall be provided with 2 permanent openings communicating directly with an addi-
tional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an uncon-
fined space (a space whose volume is not less than 50 cubic feet per 1,000 btu/hr). The total input of all gas
utilization equipment installed in the combined space shall be considered in making the determination. Each
opening shall have a minimum free area of 1 square inch per 1,000 btu/hr of the total input rating of all gas
utilization equipment in the confined space, but not less than 100 square inches. See Table 5. One opening
shall be within 12 inches of the top and and one within 12 inches of the bottom of the enclosure.
(B) ALL AIR SUPPLY FROM OUTDOORS:
The confined space shall be provided with 2 permanent
openings, one commencing within 12 inches of the bot-
tom and one commencing within 12 inches of the top of the
enclosure. The opening shall communicate directly, or by
ducts, with the outdoors or spaces (crawl or attic) that freely
communicate with the outdoors.
1. When communicating with the outdoors (either directly
or through vertical ducts), each opening shall have a
minimum free area of 1 square inch per 4,000 btu/hr of
total input rating of all equipment in the enclosure. See
Table 5. When installing a heater below ground (in a
pit), combustion and ventilation air openings must be
provided as shown in Figure 5.
2. When communicating with the outdoors through hori-
zontal ducts, each opening shall have a minimum free
area of 1 square inch per 2,000 btu/hr of total input rat-
ing of all equipment in the enclosure. See Table 5.
3. When ducts are used, they shall be of the same cross-
sectional area as the free area of the openings to which
they connect. The minimum dimension of rectangular air
ducts shall not be less than 3 inches.
For more detailed methods of provid-
ing air for combustion and ventilation,
refer to the latest edition of the National
Fuel Gas Code (ANSI Z223.1/NFPA 54).
Figure 5: Below-Ground (Pit)
Installation
Ground Level
Ventilation
Air Combustion
Air
Air Duct from
Ground to Base
Drip Tee
Gas Cock
Sediment Trap Level Flooring
or Slab
Rise of 1 inch
per foot
Vent Cap
Table 5: Combustion and Ventilation Air Requirements
Free Area per Btu
Requirement Total Input (Btu/hr)
Combustion Air Free
Area Required
(sq. in.)
Ventilation Air Free
Area Required
(sq. in.)
1 sq. in. per 1,000 Btu/hr
(paragraph A)
250,000 250 250
400,000 400 400
1 sq. in. per 2,000 Btu/hr
(paragraph B-2)
250,000 125 125
400,000 200 200
1 sq. in. per 4,000 Btu/hr
(paragraph B-1)
250,000 62.5 62.5
400,000 100 100

16
Listed
cap
Listed gas
vent
12
Roof pitch is x/12
Lowest discharge opening
H (minimum)-
Minimum height from roof
to lowest discharge opening
x
VERTICAL VENTING – NEGATIVE PRESSURE:
VENT SIZING
Size the vent pipe according to the venting
tables in the National Fuel Gas Code (ANSI
Z223.1/NFPA 54) for a Category I gas appliance
using single-wall or double-wall (Type B) gas
vent. Vent pipe diameter should not be less than
the size of the vent pipe adapter on the heater
(see Table 6). The maximum vent height can-
not exceed 50 ft. The total lateral (horizontal)
length cannot exceed 1/2 of the total vent height.
The system may have up to 3 90-degree elbows
maximum. Single-wall vent may be used in
conditioned spaces only. Clearance to combus-
tible materials for single-wall vent is 9 inches.
Double-wall (Type B) vent must be used in non-
conditioned spaces.
VENT TERMINATION
Vent extending through a roof or wall must be listed double-wall (Type B) vent, and pass through an
approved roof jack, or roof thimble. A listed vent cap must be used. Gas vents that are spaced less than 8 ft
horizontally from a vertical wall or similar obstruction shall terminate not less than 2 ft above any portion
of a building within 10 ft. Gas vents that are spaced 8 ft or more horizontally from a vertical wall or similar
obstruction shall terminate above the roof a distance H based on the roof pitch. Using the roof pitch, find the
minimum value of H using Figure 6 and Table 7.
Table 6
Vent Pipe Diameters for
Negative-Pressure Indoor Vent Kits
Indoor Vent Kit
Part Number Heater Model Vent Pipe Diameter
UHXNEGVT12501 TR250 6 inch
UHXNEGVT14001 TR400 8 inch
Figure 6: Minimum Height from Roof for Vent
Cap
Table 7
Height Requirements for Vent Caps
(see Figure 5)
Roof Slope Min. Height H from Roof to Lowest
Discharge Opening
Flat to 6/12 1.0 ft
Over 6/12 to 7/12 1.25 ft
Over 7/12 to 8/12 1.5 ft
Over 8/12 to 9/12 2.0 ft
Over 9/12 to 10/12 2.5 ft
Over 10/12 to 11/12 3.25 ft
Over 11/12 to 12/12 4.0 ft
Over 12/12 to 14/12 5.0 ft
Over 14/12 to 16/12 6.0 ft
Over 16/12 to 18/12 7.0 ft
Over 18/12 to 20/12 7.5 ft
Over 20/12 to 21/12 8.0 ft

17
HORIZONTAL OR VERTICAL VENTING – POSITIVE PRESSURE:
When installed according to the following instructions, Trane heaters meet the criteria for cateogry III vent-
ing.
VENT SIZING
Vent pipe diameter must match the vent pipe diameter on the heater (see Table 9). The vent pipe must be
single or double-wall stainless steel sealed vent as listed in Table 9. Double-wall vent must be used in non-
conditioned spaces. The maximum total length of vent pipe, and number of 90-degree elbows cannot exceed
the limits specified in Table 8.
The venting system must be installed in accordance with the vent manufacturer’s installation instructions
and guidelines. The installer is urged to visit the vent system manufacturer’s website (see below) and review
the installation information found there.
VENT TERMINATION
The vent system must terminate with a vent terminal approved for this pool heater. Termination may be
either horizontal or vertical. See Table 9 for vent terminals which are approved.
OBTAINING VENT PIPE AND TERMINALS
A variety of double-wall vent components, including terminals, elbows, and straight lengths, which will
satisfy the needs of most applications of your Trane pool heater are available. The parts are listed in the ser-
vice parts section in the back of this manual. Also, the instruction sheet included with the kit can be used as a
guide in specifying installations. It can be obtained from www.hayward-pool.com. If you need more special-
ized fittings, you may order them directly from the manufacturer, or one of their authorized dealers. To locate
an authorized dealer for venting parts, contact the appropriate manufacturer at:
M&G DuraVent Inc. Selkirk Corporation
6 Jupiter Ln. Heatfab Division
Colonie, NY 12205 OR 130 Industrial Blvd
[phone] Turners Falls, MA 01376
www.duravent.com [phone]
www.heatfab.com
Number of 90-
degree Elbows
Maximum Vent Pipe
Length
(horizontal & vertical)
0 50 ft
1 50 ft
2 40 ft
3 30 ft
Table 8
Maximum Vent Pipe Length and Number of Elbows for
Positive-Pressure Vent Systems

18
Table 9
Vent Pipe & Terminal Specifications for Positive-Pressure Indoor Vent Kits
Heater
Model Service Kit Part Number
Maximum
Installation
Altitude
Nominal
Vent Pipe
Diameter Appliance Adapter Gas Vent
Type Vent Pipe Horizontal Vent Terminal Vertical Vent Terminal
TR250 UHXPOSHZ12501 10,100 ft 6 inch Included in UHX kit NAT &
LP
Single-
Wall Heatfab Saf-T Vent EZ Seal P/N 960x * Heatfab P/N 5690CI ‡” Heatfab P/N 5600CI
Double-
Wall Heatfab Saf-T Vent CI Plus P/N CCA06Lx ** Heatfab P/N CCE06WP ‡ Heatfab P/N CCA06RC
TR250NA UHXPOSHZ12502 2,000 ft 4 inch Heatfab P/N 1501329001 or
DuraVent P/N 810003683
NAT
ONLY
Single-
Wall
Heatfab Saf-T Vent EZ Seal
P/N 940x *
or
DuraVent FasNSeal P/N
FSVLx04 †
Heatfab P/N
9414TERM
or
DuraVent P/N
FSTT4
Heatfab P/N
5400CI or
DuraVent P/N
FSRC4
Double-
Wall
Heatfab Saf-T Vent CI Plus
P/N CCA04Lx **
or
DuraVent FasNSeal W2
P/N W2-x04 †
Heatfab P/N
9414TERM
or
DuraVent P/N
FSTT4
Heatfab P/N
CCA04RC
or
DuraVent P/N
W2-RC4
TR400 UHXPOSHZ14001 10,100 ft 8 inch Included in UHX kit NAT &
LP
Single-
Wall Heatfab Saf-T Vent EZ Seal P/N 980x * Heatfab P/N 5890CI ‡ Heatfab P/N 5800CI
Double-
Wall Heatfab Saf-T Vent CI Plus P/N CCA08Lx ** Heatfab P/N CCE08WP ‡ Heatfab P/N CCA08RC
TR400 UHXPOSHZ14002 2,000 ft 6 inch Heatfab P/N 1501646501 or
DuraVent P/N 810003725
NAT &
LP
Single-
Wall
Heatfab Saf-T Vent EZ Seal
P/N 960x *
or
DuraVent FasNSeal P/N
FSVLx06 †”
Heatfab P/N
9614TERM
or
DuraVent P/N
FSTT6
Heatfab P/N
5600CI or
DuraVent P/N
FSRC6
Double-
Wall
Heatfab Saf-T Vent CI Plus
P/N CCA06Lx **
or
DuraVent FasNSeal W2
P/N W2-x06 †
Heatfab P/N
9614TERM
or
DuraVent P/N
FSTT6
Heatfab P/N
CCA06RC
or
DuraVent P/N
W2-RC6
* For Heatfab single-wall vent pipe section length, “x” should be: 1, 2, 4, 5, or 7, where 1=6 inches, 2=12 inches, 4=18 inches, 5=24 inches, and 7=36 inches.
** For Heatfab double-wall vent pipe section length, “x” should be: 06, 09, 12, 18, 24, or 36, indicating the length of the vent pipe section in inches.
† For DuraVent vent pipe section length, “x” should be: 6, 12, 18, 24, or 36, indicating the length of the vent pipe section in inches.
‡ For these horizontal terminals, the wall penetration is included from the vent manufacturer. On all others, it must be ordered separately.

19
REVERSIBLE WATER CONNECTIONS:
This heater is designed so that it can be installed with the water connections located on either the right or
left side. Heaters are factory-shipped with right-side water connections. To move the connections to the left
side follow the instructions below. A trained service technician should perform these steps before the heater is
installed.
PROCEDURE:
1. Before beginning, be aware that it is not necessary to re-
move the water header from the heat exchanger. When
this procedure is complete, the water inlet will be located
at the BACK of the heater. The water outlet will be lo-
cated at the FRONT.
2. Remove screws and remove both of the upper plastic
heater side panels (see Figure 7 and Figure 8). Note the
wires that pass through a hole in the heater side panel go
through a split-bushing, which will allow separation of
the wires from the panel without disconnecting them.
3. Disconnect the 2 wires connecting the heater wire har-
ness to the heat exchanger header. One is located on the
water pressure switch and one is located on the tempera-
ture limit switch, both on the top of the header. Pull these
wires into the heater cabinet from the hole in the right-
hand metal side panel in the heater, and re-route them out
through the left-hand metal side panel in the heater.
4. Remove countersunk screws on the heater top and remove louvered exhaust panel on heater top (see Figure
8).
5. Remove the heater top flue cover by removing 3 screws on each side of the heater (see Figure 8).
6. Remove screws and remove rain shield assembly (see Figure 8). Note that there are screws which hold the
rain shield assembly to the heat exchanger tube sheets, which also must be removed.
7. Remove the front access panel (see Figure 8).
8. Disconnect water temperature sensor plug from the ignition control board located inside the heater (see
Figure 8).
9. Pull the water temperature sensor wires out of the heater cabinet through the hole in the right-hand metal
side panel.
10. Lift and rotate the heat exchanger. Do not flip. Use care when setting the heat exchanger in place not to
damage the white sealing gaskets or combustion chamber.
11. Route the water temperature sensor wires into the heater cabinet through the hole in the left-hand metal side
panel, and re-connect to the ignition control board.
12. Re-connect the heater wire harness to the water pressure switch and temperature limit.
13. Reverse the above steps to reassemble the heater.
Figure 7: Screw locations on side of unit
Screw Locations

20
Figure 8: Sub-Assemblies
Top Flue Cover
Louvered
Exhaust Panel
Rain Shield
Assembly
Heat Exchanger
Assembly Temperature
Limit Switches
Drain Plug or Valve
Pressure
Switch Port
Upper Plastic Heater
Side Panel
Ignition Control
Circuit Board Upper Plastic Heater
Side Panel
Front Access Panel