MODEL 250SXO - OUTDOOR MODEL
For exterior use only
Electronic Ignition and built in Freeze protection
Suitable for heating potable water only
Not approved for space heating purposes
250 SXO NG - Natural Gas
250 SXO LP - Liquefied Petroleum (LP) Gas
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
vapor and liquids in the vicinity of this or any other
appliance.
What to do if you smell gas
Close gas valve.
Do not try to light any appliance.
Do not touch any electrical switch; do not use any
phone in your building.
If you cannot reach your gas supplier, call the fire
department.
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.
Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions
Installation and service must be performed by 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.
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Warning
What to do if you smell gas
Close gas valve.
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.
Warning: 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 psig.
FCC:
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2)
this device must accept any interference received,
including interference that may cause undesired
operation.
Fig. 1
Caution:
Any
changes
or
modifications not expressly approved
by the party responsible for compliance
could void the user’s authority to
operate the equipment.
Fig. 2
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2
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Maximum input
2.1 Features
175,000 Btu/h (51.2 kW)
Parts
Efficiency in %
Touch Pad interface control
Recovery efficiency 86.5%
High power pre-mix compact burner with low NOx
emissions
Min. Output
Modulating Gas Valve with constant gas: air ratio
control
31,131 Btu/h (9,1 kW)
Temperature Control
Modulating water valve for improved comfort and
temperature control
Selection range: 100°F (38°C) - 140°F (60°C)
Default temperature: 122°F (50°C)
Stability: +/- 2°F (+/- 1°C)
Freeze protection.
Safety
Flame sensor (ionization) rod
Overheat sensor
Gas Requirement
Gas connection (inches) - ¾”
Inlet gas pressure under maximum operation*
Propane: 11” - 14” water column
Natural Gas: 5” - 14” water column.
Temperature limiter
Fan speed monitoring.
High Quality Materials for Long Working Life
Copper heat exchanger
* To measure Gas Pressure, see Measuring Gas
Pressure, chapter 2.9.
High efficiency Ceramat Burner
Water
Compact space saver: mounts on a wall with a
supplied bracket.
Hot water connection (inches) - ¾”
Cold water connection (inches) - ¾”
Easily removable two-piece cover.
Features
Water valve material: Polymer (PPS) (Polypropylene
Sulfid)
Electronic Ignition
Minimum water flow: 0.8 gallon/minute (3 l/m)
LCD Display
Minimum recommended water pressure: 30 PSI
(2.07 bar)
On/Off and Temperature control switches
Reset button
Connections:
– Bottom of heater
Program Key (Selectable temperature default)
Failure codes for easy diagnostic and repair.
Accessories
Optional wireless remote control accessory to
operate with the appliance.
BOSCH is constantly improving its
products, therefore specifications are
subject to change without prior notice.
i
2.2 250 SXO Specifications (Technical
data)
Approved in US/Canada
Capacity
Maximum flow rate: 6.35 GPM (24 l/min) at a 45°F
(25°C) rise.
Maximum output
142,968 Btu/h (41.8 kW)
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Combustion
NOx ≤ 55 ppm
CO ≤ 250 ppm.
UNPACKING THE 250 SXO HEATER
This heater is packed securely.
The box includes:
Control panel shield
Dimensions
Pressure relief valve
Depth (in): 8 ½” (220 mm)
Width (in): 15 ¾” (400 mm)
Height (in): 26” (650 mm)
Weight: 47 pounds (21 kg).
Bracket for wall hanging the heater
Plastic decal shields for covering front cover screws
and control panel, installer should affix these decals
to the front of the unit after installation is complete.
See Fig. 6
Gas types
Installation manual
Natural Gas.
LP Gas.
Product registration card.
CO2 analyzer is required to convert from one gas type
to another. Please contact CEC for specific
instructions.
Do not lose this manual. Please complete and return
the enclosed product registration card.
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.
Voltage
120 V AC (50/60 Hz)
Amperage
IDLE - 40 mA
Operation - ≤ 2,5 A
Noise
≤ 50 db (A)
The 250SXO is not approved or designed for:
Manufactured (mobile) homes, RV's or boats
Safety devices
Flame failure device (ionization flame rod sensor)
Pressure relief valve (supplied with heater)
Over heat prevention (temperature limiter).
Heating or other recirculating/pumping applications*
Solar/preheat backup or high temperature booster
use
* This includes domestic hot water circulator pump loop
systems that may previously exist in a home hot water
system. The use of a small electric mini-tank (4-6 gallon
size) should be used for this application; when
designed so the pump will circulate the hot water in the
mini-tank only and through the building's hot water
return loop (timed or thermostatic controlled operation
of the pump is commonly done). The 250SXO should
be plumbed in line before the mini-tank water heater,
contact CEC if further instruction is needed.
Water resistant
IP X5 (protection against water drops).
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2.3 Dimensions and Minimum installation clearances
Fig. 3 Dimensions
1
2
3
4
5
6
Cover
On/Off switch
Reset button
LCD display
Program button
Temperature buttons
Fig. 4 Minimum clearances
Model 250 SXO
3 ft.
TOP (A)
FRONT (B)
BACK
4 ft.
0”
SIDES
4 ft.
BOTTOM (C)
1 ft.
Table 1 Minimum clearances
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2.4 General rules to follow for safe
operation
WARNING: Proper insulation of the
water lines below the heater is required
if below freezing temperatures, below
32°F, are ever anticipated!
B 1. You should 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.
Danger: If the temperature drops
below 5°F, freeze damage to the water
heater itself must be prevented by
turning off the power to the heater, then
disconnecting the plumbing conne-
ctions and introducing short bursts of
compressed air (20-40 psi) through the
heater's connections. This will remove
the residual water in the horizontal
pipes and water valve..
In Canada: The Installation should conform with
CGA B149.(1,2) INSTALLATION CODES and /or
local installation codes.
B 2. Carefully plan where you install the heater. Proper
clearances must be followed.
B 3. 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).
Danger: Keep children away as the top
of the water heater vent cap will get very
hot during operation. Install in a place
that prevents the top of the heater being
reached by small children.
The appliance and its gas connection must be leak
tested before placing the appliance in operation.
B 4. Keep water heater area clear and free from
combustibles and flammable liquids. Do not locate
the heater over any material which might burn.
B 5. Correct gas pressure is critical for the optimum
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.
Danger: Flue gases will be released
through the vent cap. Flue gas is very
hot and contains carbon monoxide. The
heater cannot be installed indoors. To
prevent risk of fire and poisoning by
carbon monoxide, assure all clearances
indicated in manual.
B 6. 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.
Danger: Surface temperature around
vent cap is less than 140°F, except
highest top surface of vent cap may
reach 400°F.
B 7. 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.
Danger: Do not place or store any
combustible material within 5 feet of the
appliance. Risk of fire could be caused
by hot flue gas. Note: Exception is
made for the wall where the appliance
is installed and any adjacent walls or
overhang. In this case observe
clearances required in chapter 2.6.
2.5 Proper location for installing your
heater
Carefully select the location of the water heater.
Follow the guidelines below:
B 1. Locate the heater where venting, gas and
plumbing connections are feasible and convenient.
B 2. The hot water lines should be kept short to save
energy. Centrally locating the water heater is best. It
is always best to have the water lines insulated to
prevent the possibility of any freeze damage.
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.
B 3. The water in this heater is cold and always remains
cold except for the times that hot water is being used.
The heater is equipped with freeze prevention
equipment that will operate and prevent freezing of
the water in the heater to 5°F with no wind chill.
Electrical power must be maintained to the heater to
allow this to function.
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2.6 Heater Placement and Clearances
2.7 Mounting installation
The 250 SXO is design certified for installation directly
on a combustible wall. (see 2.7 Mounting installation)
For installation on vinyl siding see Fig. 10. Keep the area
below the heater free of combustible material.
Warning: before starting installation:
B check that there are no loose parts
inside the appliance
B ensure that gas pipe, gas valve, mixer,
fan and burner have no damage and are
properly fitted.
Minimum clearances
If the appliance is installed under an overhang, there
must be a 36” clearance from the top of the appliance
and the mounting area must be open in front and on the
sides of the appliance.
Front cover should be removed in order to
inspect components visually (see
instructions below).
i
To remove front cover.
B Loosen the two Philips head screws located on front
panel (beneath plastic decal shields if they are
already attached, see Fig. 6).
Plastic decals
Fig. 5
Danger: The top of the kit will get hot
due to the flue gases. Install away from
children.
Min.
distances
Ref. Description
A
B
C
Directly below or from an
opening; operable windows,
doors and any fresh air
openings
≥ 4 ft
≥ 4 ft
Fig. 6 Remove front cover
B Remove the two top screws securing the vent cap to
the top of the heater, being careful the washers on
the screws are not lost, see Fig. 7.
From any adjacent wall or tall
shruberry
D
Below a gutter, sanitary
pipework, eaves or overhang
E
F
≥ 3 ft
≥ 1 ft
Above ground
From a gas meter, gas
regulator, electrical box or
another 250SXO heater
G
≥ 3 ft
Table 2 Clearances
Fig. 7
B Lift the top vent cap completely upward from the
heater.
B From the bottom of the heater, holding the sides, lift
the front cover panel of the heater upward and
slightly toward you to remove.
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B After inspection, replace front cover and tighten
screws, then replace plastic decal shields.
B Fix the top vent cap on the top of the heater, as
shown in Fig. 8). Make sure the vent cap is well fitted
by taking special care that the front cover stays inside
the extended corners of the vent cap, as shown in
Fig. 8). The sides of the cover must be pressed with
your hands to ensure it fits inside those corners.
Secure it in place with its two screws.
Fig. 9
Warning: Do not mount heater directly
to vinyl siding. With vinyl siding
surfacing, a 6' x 4' area of the siding
must first be removed and then
replaced with wood or other non-plastic
made material. See Fig. 10.
Fig. 8
B The water heater is design certified for mounting on
a wall. Secure the wall mounting bracket provided
with the water heater to a wall surface. See Fig. 9.
B The installation method of the mounting bracket will
depend on what type of surface it’s being mounted
to. Due to the varying types of building surfaces, the
installer must decide on how best to support and
level the heater on an outside wall. It is always
recommended that horizontal or vertical support
boards or plywood sheathing (1/2” minimum) first be
attached to the wall surface. The heater must also be
kept level on the wall surface.
Fig. 10
Vent Safety System
The 250 SXO will shut down if the intake or exhaust
louvers on the vent cap are blocked for any reason; see
troubleshooting section on page 19. See error code
table to confirm error, correct the problem and then
reset the heater before operating.
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2.8 Gas piping & connections
Warning: 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.
Before connecting the gas supply, check the rating
plate on the right side of the heater to be sure that the
heater is rated for the same gas to which it will be
connected.
In the United States: The installation must conform with
local codes or, in the absence of local codes, the
National Fuel Gas Code ANSI Z223.1/NFPA 54.
In Canada: The Installation should conform with CGA
B149 INSTALLATION CODES and/or local installation
codes.
The water heater must not be piped with gas supply
pressures in excess of 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.
When 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.
GAS LINE SIZING
The gas supply piping should be sized according to the
applicable plumbing code for a maximum draw of
175,000 BTUH. Measure the length of gas supply line
and use the tables in Fig. 12 or the gas line
manufactures sizing tables to determine the pipe
diameter necessary to accommodate the BTU demand
of the unit. If there are more gas drawing appliances on
the line, size the gas line according to the total maximum
amount of BTU draw for all appliances.
Danger: If you have 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.
Note: Under sizing the gas line may result in diminished
output and improper operation. See chapter 2.9 for the
procedure to confirm gas pressure.
Inlet gas particle screen
Gas piping
Fig. 11
B Install a manual gas shut off valve, on the gas supply
line.
B The use of a union when connecting gas pipe to the
gas inlet connection is important, this will facilitate
any necessary servicing and cleaning of the inlet gas
particle screen.
B The minimum diameter required for any appliance
connector used is ¾”.
B 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.
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FOR NATURAL GAS
Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop
of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands.
Follow boxed numbers for piping just one 250 SXO (example: ¾” B.I. Natural Gas pipe for 20 ft (6.1m). will
handle 190,000 btu’s (55.7 kWh). For multiple appliances combine the total btu input load and then refer to
applicable chart below.
Nominal
Iron
Length of Black Iron Pipe, Feet
Pipe
Internal
Size, Diameter
inches inches
10
20
30
40
50
60
70
80
90
100
125
150
175 200
1/4
3/8
1/2
0.364
0.493
0.622
32
72
22
49
92
18
40
73
15
34
63
14
30
56
12
27
50
11
25
46
11
23
43
10
22
40
9
8
8
7
6
21
38
18
34
17
31
15
28
14
26
132
3/4
1
0.824
1.049
278
520
190
350
152
285
130
245
115 105
96
90
84
79
72
64
59
55
215 195 180
170
160
150
130
120
110 100
1 1/4
1 1/2
2
1.380
1.610
2.067
1050
1600
3050
730
590
890
500
760
440 400 370
670 610 560
350
530
320
490
930
305
460
870
275
410
780
250
380
710
225 210
350 320
650 610
1100
2100 1650 1450
1270 1150 1050 990
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Tube
size,
inches
EHD*
10
20
58
30
47
96
40
41
50
37
60
34
1/2
3/4
1
18 EHD 82
23 EHD 161
30 EHD 330
116
83
75
68
231 188
456 374
162
325
144
292
131
267
* EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing
.
1 1/4 37 EHD 639
FOR LP GAS
Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Petroleum Gases (at 11 inches Water Column Inlet
Pressure) (Based on a Pressure Drop of 0.5 Inch Water Column).
* EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing.
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Nominal
Tube
size
inches
Iron Pipe
Size,
Black Iron Pipe
Length of Pipe, Feet
EHD*
Inches
10 20 30
40 50 60 70 80 90 100 125 150
10
20
91
30
74
40
64
50
58
60
53
1/2
275 189 152 129 114 103 96 89 83
78
69
63
1/2
3/4
1
18 EHD 129
3/4
1
567 693 315 267 237 217 196 185 173 162 146 132
107 732 590 504 448 409 378 346 322 307 275 252
23 EHD 254 183 151
30 EHD 521 365 297
131
256
449
118
227
397
107
207
359
1 1/4 220 149 121 103 913 834 771 724 677 630 567 511
1 1/2 330 229 185 155 141 127 118 108 102 976 866 787
1 1/4 37 EHD 971 661 528
Maximum Capacity of Semi-Rigid copper Tubing in
Copper
Outside
diameter
Inch
Length of Tubing, Feet
Thousands of BTU per Hour of Undiluted Liquefied
Petroleum Gases (at 11 inches Water Column Inlet
10 20
39 26
92 62
30 40
21 19
50 41
50
_
60 70 80 90 100
Pressure).
3/8
1/2
_
_
_
_
_
(Based on a Pressure Drop of 0.5 Inch Water Column)
37
79
35 31 29 27 26
72 67 62 59 55
5/8 199 131 107 90
* Source National Fuel Gas Code NFPA 54, ANSI
Z223.1 - No Additional Allowance is necessary for an
ordinary number of fittings
3/4 329 216 181 145 131 121 112 104 95 90
Fig. 12
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2.9 Measuring gas pressure
Static Gas Pressure Reading (see Chapter 2.9)
enter here: ___________________
2.9.1 Connecting Manometer
B Shut off gas.
Operating Gas Pressure Reading (see Chapter 2.9)
enter here: ___________________
B Remove front cover and locate inlet gas pressure
measuring point (see Fig. 14).
Table 3
B Loosen screw inside test point fitting (do not remove)
HIGH ALTITUDE OPERATION
and connect manometer tube on test point.
Altitude
Natural
Gas:
Liquid
Propane:
2.9.2 Static Pressure Test
B Turn gas supply back on.
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
B Operate all other gas appliances on same gas piping
0 - 4,000 ft
(0 - 1,219 m)
no
no
modification
modification
system at maximum output.
B Record static gas pressure reading in table 3.
CO2 adjustment with flue
cghaaspatnearl9yzeforrreinqsutirruecdtiSonese.
2.9.3 Operating Pressure Test
4,000 ft - 7,000 ft
(1,219 m - 2,134 m)
B ON/OFF switch in position OFF (0).
B Press and hold "Program" (M) button and turn ON/
Above 7,000 ft
(above 2,134 m)
OFF switch to ON position.
Not approved
Table 4
Fig. 13
B As soon as '188' is displayed, release "Program"
button and the display should read P2.
B Press
, until P1 appears.
Note: While in this mode the appliance will run
constantly at maximum power and allow maximum water
flow. These program modes are for test purposes only
and not intended for normal operation.
B Turn on high volume of hot water flow (at least 6
gpm) and heater will ignite.
B Record operating gas pressure reading in table 3.
Gas pressures lower than 5" W.C. for Natural Gas or
11" W.C. for LPG will result in insufficient degree rise
to the hot water being used, and must be corrected.
See Gas Connections, chapter 2.8.
Fig. 14 Gas pressure measuring (left tapping)
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lowest pressure range setting recommended is 30-50
psi (2.07 and 3.45bar).
2.10 Water connections
When facing the heater, the ¾” cold water inlet is on the
bottom right and the hot water outlet is on the bottom
left. Install the heater where it’s centrally close to hot
water use points if possible, and make hot water piping
runs as short as possible.
Connecting the pressure relief valve (PRV)
A listed pressure relief valve supplied with the heater
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 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. 16. 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.
INLETFILTER
SCREEN
COLD
HOT
Fig. 15
B THE USE OF A UNION WHEN CONNECTING
BOTH WATER PIPES TO THE INLET AND
OUTLET CONNECTIONS IS RECOMMENDED,
THIS WILL FACILITATE ANY NECESSARY
SERVICING AND REQUIRED CLEANING OF
THE INLET WATER PARTICLE SCREEN.
Although water piping throughout your structure may be
other than copper, we recommend that copper piping
or suitably rated stainless steel flex line piping be used
for at least three feet before and after the heater (follow
local codes if more stringent). Never sweat any rigid
piping directly to or beneath the water connections,
damage can occur to the internal water valve from
heating of the pipe. Plastics or other PEX type plumbing
line materials are not suitable for connecting directly to
the water heater. Keep water inlet and outlet pipes to no
less than ¾" (19.05mm) diameter to allow the full flow
capacity.
Fig. 16 Plumbing Connections and Pressure Relief
Valve
It is recommended that all water piping below the
heater be properly insulated to avoid heat loss. If
below freezing temperatures are ever anticipated
where the heater is located, insulation material
is required and must be capable of protecting the
piping from freezing. The freeze protection that is
equipped within the heater will not prevent any
freeze damage to the exterior water piping.
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 valves should be installed on both the cold
water supply and hot water outlet lines to facilitate
servicing the heater (see Fig. 16). For installation on a
private well system with the use of a pressure tank, the
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2.11 Electrical connections
Warning: The heater is equipped with
freeze prevention equipment that will
operate and prevent freezing of the
water in the heater to 5°F with no wind
chill. Electrical power must be
maintained to the heater to allow this to
Warning: Confirm that the water
heater is appropriately grounded and
that the installation meets all electrical
codes. Outdoor electrical outlets have
special requirements.
function.
WARNING:
Proper
insulation of the water lines below
the heater is required if below
freezing temperatures, below 32°F,
are ever anticipated.
Warning:
For
safety
reasons,
disconnect the power supply to the
heater before any service or testing is
performed.
2.12 Operating instructions
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 should 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.
B Remove the control cover shield to access the
controls of the water heater.
The 250 SXO requires an electrical power supply from
a 120VAC 60Hz circuit and must be properly
grounded.
A means for switching off the 120VAC power supply
must be provided.
The heater is wired as shown in the wiring diagram
(chapter 6, Fig. 29).
Fig. 18
Warning: The control cover must be
replaced after the initial operation
begins, and must be in place at all
times.
B Before proceeding with the operation of the heater
make sure that the system is filled with water.
B Turn off power supply to heater.
B Open the cold water inlet supply to the heater fully.
B Open a hot water faucet to permit the water to fill the
heater and the piping and to eliminate the air trapped
in the system.
B Close the hot water faucet after the water flows freely
and all the air has escaped from the system. Turn on
power supply to heater. The water heater is now
ready to operate.
Appliance electrical
power supply
Fig. 17
NOTE: A default temperature setting of
122 F will appear on the display screen.
i
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Appliance details
2.13 For your safety read before
operating your water heater
NOTE: on a first time initial
installation or after gas line work
has been done, air in the gas line
will cause ignition delay when the
hot water is turned on. This will
result in an error (EA or EC) on the
units display screen. This is
normal. When this occurs, leave
the hot water running and wait 3-5
seconds, then press reset button
to reset the unit (Fig. 19, pos. 2).
Wait for (EA or EC) to disappear.
The heater will begin to attempt
ignition again, if the (EA or EC)
reappears then repeat this same
process until all air has been bled
from the gas line.
i
Warning: 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 burners. When turning the heater on,
follow these instructions exactly.
B. Before operating the unit, turn the On/Off switch to
the right position.
WHAT TO DO IF YOU SMELL GAS
B Do not try to light any appliance.
B Do not touch any electric switch; do not use any
phone in your building.
When the heater is in operation you will hear its power
vent fan and burner operating. Upon turning off the hot
water flow the power vent fan will continue to operate
for up to 60 seconds to exhaust all flue gases. The
power vents fan speed is variable depending on the rate
of hot water used and the burner output.
B Immediately call your gas supplier from a neighbors
phone. Follow the gas supplier’s instructions.
B If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to turn the on/off control switch.
Never use tools. Follow these instructions exactly. If
control switch is jammed, close the gas supply and call
a qualified service technician. Attempted forceful repair
may result in a fire or explosion.
D. 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.
TO TURN OFF GAS TO APPLIANCE
B Turn off the manual gas shut off valve on the supply
line to the heater and set the ON/OFF switch to the
OFF position (turn to the left position). Note: a
manual gas shut off valve is not supplied with the
heater.
2.14 Lighting and operating instructions
B 1. STOP! Read the previous safety information.
B 2. The gas valve must be shut off by putting the ON/
OFF switch to the OFF position (turn to the left
position). Wait five (5) minutes to clear out any gas.
If you smell gas, STOP! Follow “B” in the safety
information above. If you do not smell gas, go to the
next step.
B 3. This appliance is equipped with electronic ignition
for lighting the main burners. When turning the
heater on, follow these instructions exactly.
B 4. Set the ON/OFF switch to the ON position (turn to
the right position).
B 5. Open a hot water tap.
B 6. The burners will remain on until the hot water tap
is turned off.
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Operation instructions
3
Operation instructions
Fig. 19
1
2
3
4
5
6
On/Off switch
Reset button
Program button
Increasing temperature button
Decreasing temperature button
LCD display
B Press buttons
and
in order to reach
requested temperature.
3.1 Power
On
B To start the appliance switch the button to the ON
position (turn to the right position).
LCD display the default temperature - temperature
factory setting 122°F (50°C).
Fig. 21
If the outlet water temperature is set too high, the heater
can produce temperatures that are too hot. A
temperature balance shower valve can automatically
mix in cold water to reduce such hot water temperature.
In the event of any temperature instability with the use
of a temperature balance shower valve, refer to shower
valve manufacturer's instructions for internal adjustment
setting. Adjustments should be made to the hottest
setting in the shower valve. Additionally the temperature
control of the heater can be lowered to produce a more
comfortable hot water temperature.
Fig. 20
Off
B To shut down the appliance, switch the button to the
OFF position (turn to the left position).
3.2 Temperature selection
To select water temperature outlet:
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Operation instructions
Setting the water temperature
The desired temperature of the hot water can be adjusted on the front control panel of the heater.
The 250 SXO 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.
Hot Water Flow and Temperature with Various Inlet Temperature (gpm/Fahrenheit)
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
90
100
110
120
130
140
150
Hot water temperature (ºF)
Inlet (ºF) 40
Inlet (ºF) 50
Inlet (ºF) 60
Inlet (ºF) 70
Hot Water Flow and Temperature with Various Inlet Temperature (lpm/Celsius)
24.00
20.00
16.00
12.00
8.00
4.00
0.00
35
40
45
50
55
60
65
Hot water temperature (ºC)
Inlet (ºC) 4
Inlet (ºC) 10
Inlet (ºC) 16
Inlet (ºC) 21
Fig. 22 Flow/temperature charts
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Operation instructions
3.3 Use of remote control accessory
Fig. 26 Reset button
If the problem persists, contact your installer.
3.6 Program button
Fig. 23 Remote control
Program button can be used/programmed in the
appliance and in the remote control.
The wireless remote control accessory and the
temperature selector buttons on the front of the water
heater operate identically. Contact your distributor or
CEC to order if the remote control accessory is
preferred. Modification of the water heaters interior
control unit (Fig. 32, component 12) is required when
programming the remote control with this heater.
Programming “Program” function
Programming actions are similar for both controls
(appliance control pad and wireless remote control).
NOTE: up to 6 remote controls can be
programmed for one single water heater,
each with a range distance of 98 ft (30 m).
i
3.4 Operation
B When a hot water tap is opened, main burner ignites
Fig. 27 “Program” key
and LCD displays indication
.
B Press buttons
and
to select temperature to
be memorized.
B Hold “Program” button for 3 seconds to save
temperature.
When LCD stops blinking. Temperature is saved on
“Program”.
Fig. 24
Using “Program” function
In order to select memorized temperature
B LCD blinks until selected temperature is reached.
B Press “Program” key.
3.5 Reset button
LCD shows pre-memorized temperature, which is now
the hot water selected temperature.
If the LCD shows the error symbol
Note: do not use the ON/OFF switch when error is
present.
See the error code on LCD and consult
“Troubleshooting” section.
.
3.7 Locked condition
This condition is only valid for appliances with more than
1 controller (an appliance with one or more remote
controls).
Fig. 25
Fig. 28 Locked condition
After
following
instructions
indicated
in
Whenever LCD shows
the temperature setting
“Troubleshooting” section
cannot be adjusted because the appliance is in use by
a user which already selected a different temperature.
Appliance will be automatically unlocked after closing
hot water tap.
B press reset button in order to make the appliance
ready-to-work.
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Maintenance and service
4
Maintenance and service
BURNERS DO NOT IGNITE WHEN HOT WATER IS
TURNED ON
Warning: Always turn off the electrical
power supply, turn off the manual gas
valve and turn off the manual water
control valves whenever servicing.
Cold incoming water connection made to
wrong side of heater
Make sure cold water inlet connection is plumbed to
the right side of heater when facing unit
The unit should be checked once a year by a gas
technician. If repairs are needed, the repairs should be
done by a gas technician
Water flow rate at hot water tap is too low
A minimum of 0.8 gallon/minute (3 l/m) is required to
activate the heater
To remove front cover
Cold water inlet filter screen is dirty
Remove water inlet filter screen and clean. The
screen is located at the inlet connection to the water
heater, disconnecting the main cold supply line at the
heater is required. Check and clean faucet aerator
screens too.
B See instructions to remove front cover on page 8.
Systems and parts that should be checked at
least once a year
Reference diagrams on pages 24 and 25.
Venting system
Crossover in plumbing
Burners -see page 24 for observation window
The heater activates when there is sufficient water
flow through its water valve, a minimum of 0.8 gallon/
minute (3 l/m) is required. If there is a crossover in the
plumbing, the necessary hot water flow rate through
the unit may not be reached, even though the flow at
the hot water tap is sufficient. A plumbing crossover
can be caused by a failed washer at a single lever
faucet, incorrect plumbing or a faulty mixing valve in
the piping. The crossover will create a back pressure
on the water heater and prevent an adequate flow of
water through it. To confirm there is no crossover in
the plumbing, shut off the cold water supply feed to
the water heater. Individually open each of the hot
water taps. There should be no water flowing under
a constant pressure. If there is a constant flow of
water then the plumbing crossover must be
corrected before the heater can operate properly.
See relief valve manufacture's instruction for
pressure relief valve maintenance
Periodic cleaning of the water filter screen, see Fig.
15, chapter 2.10.
Flushing the heat exchanger with a descaling
solution if mineral build up is evident. Scale build up
will shorten the life of the water heater, descale heat
exchanger thoroughly and repeat annually depending
on mineral content of ground water.
5
Troubleshooting
Introduction
The 250 SXO burner is activated by a water flow valve.
Numerous water related problems can cause this water
valve to malfunction such as: Insufficient water flow
volume to activate the burners at its minimum flow
requirement; Dirt in the inlet filter screen; Sediment
build-up in faucet aerators, or shower heads; Uneven
pressures between cold and hot (with single lever mix
valves); and Plumbing crossovers. These water flow
related problems can cause the heater to deliver less
than its full output, or to fail to ignite or to shut down
completely.
Problems stated below in upper case and in bold face
should be investigated when there is a problem with the
performance of the water heater but there is NO error
code on the heater's LCD display or wireless remote
control.
WATER IS TOO HOT
Temperature selection too high
Lower temperature adjustment on heater or wireless
remote control accessory, see chapter 3.2.
WATER IS NOT HOT ENOUGH
Temperature selection too low
Increase temperature adjustment on heater or
wireless remote control accessory, see chapter 3.2
Btu input is too low due to inadequate gas line
sizing
See specifications in chapter 2.8 - 2.9. The 250
SXO requires adequate gas pressure to reach
desired temperatures, to compensate for inadequate
gas supply or lack of gas pressure the 250 SXO will
effectively reach the selected output temperature by
reducing the hot water flow rate. Its motorized water
valve makes this adjustment
Any failures that result in a displayed error code are
referenced on page 21. A Functional Scheme of the
250 SXO is detailed on page 23. If there is a problem
with the installation, venting or operation of the unit, the
heater will communicate the source by these error
codes.
Cold water is mixing with the hot water outlet
(crossover)
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Troubleshooting
Test by following 4th bullet under BURNERS DO
NOT IGNITE WHEN HOT WATER IS TURNED ON.
control of the heater can be lowered to produce a
more comfortable hot water temperature.
Inlet water pressure is erratic due to
fluctuating supply water pressure
LOW WATER FLOW/PRESSURE
Too many hot water applications are being
used simultaneously or too much flow is being
demanded
The 250 SXO will effectively support two 2.0-2.5
gpm shower heads simultaneously or multiple sink
applications. Greater draws will result in increased
pressure drop and reduced flow at taps. See flow/
temperature chart on page 17.
For installation on a private well system with the use
of a pressure tank, the lowest pressure range setting
recommended is 30-50 psi (2.07-3.45 bar). The use
of a pressure reducing valve after the pressure tank
is also an effective way to maintain a constant water
pressure to the water heater. Watts brand 25AUB-
¾” or N35B-¾” pressure relief valves or equivalent
are suggested.
Btu input is too low due to inadequate gas line
sizing
See specifications in chapter 2.8 - 2.9. The 250
SXO requires adequate gas pressure to reach
expected temperatures and flow rates, to
compensate for inadequate gas supply or lack of gas
pressure the 250 SXO will effectively reach the
selected output temperature, but only by reducing
the hot water flow rate. Its motorized water valve
makes this adjustment. Proper gas pressure will
need to be delivered before the motorized water
valve will allow greater flow rates through it. Lowering
the set temperature will also allow increased water
flow rate through the motorized water valve. See
flow/temperature chart on page 17.
Cold water inlet filter screen is dirty
Remove water inlet filter screen and clean. The
screen is located at the inlet connection to the water
heater, disconnecting the main cold supply line at the
heater is required. Check and clean faucet aerator
screens too.
HOT WATER TEMPERATURE FLUCTUATES /
UNIT DEACTIVATED
Unbalanced pressure in water lines
Any restriction caused by the water heater in the hot
water system can result in uneven pressures
between the cold and the hot. In such cases when
mixing cold water at the tap (manually or
automatically through a mix-type shower valve) the
lower hot water pressure may be overpowered by the
higher cold water pressure in the building and cause
the hot water flow rate to fall below the minimum rate
required. A pressure balance valve will help to
resolve this symptom.
Temperature balance valves
If the outlet water temperature is set too high, the
heater can produce temperatures that are too hot. A
temperature balance shower valve can automatically
mix in cold water to reduce such hot water
temperature. In the event of any temperature
instability with the use of a temperature balance
shower valve, refer to shower valve manufacturer's
instructions for internal adjustment setting.
Adjustments should be made to the hottest setting in
the shower valve. Additionally the temperature
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Troubleshooting
Display Cause
Solution
E9
EA
Temperature limiter opened circuit (overheat).
Trips at 220F (104C).
Check connections. *
Check heat exchanger condition.*
No ionization during safety time (safety time out).
Note: appliance makes 3 ignition attempts
before entering error mode “EA”.
Check gas pressure. (see chapter 2.9
)
*
Check that gas is not diluted with air, as a
result from recent gas pipeline rework.*.
Check if vent terminal is blocked (especially
when the appliance starts up for some sec-
onds and then looses ionization signal).*
Check ionization electrode.*
EC
FA
The ionization signal momentarily disappeared
more then 5 times in less then 30 seconds. CO2
may be out of adjustment
Check for a proper ground.*
Check CO2 levels.* (see chapter 9)
Leakage error (gas valves do not close gas
circuit).
Check gas valve and control unit.*
F7
E0
Ionization error (flame sensing at stand-by).
Internal software/hardware failure.
Check control unit.*
Check control unit.*
A7
Hot water temperature sensor/receiver defect
(from control unit).
Check water temperature sensor/receiver and
connections.*
Check incoming water temperature to heater, it
must be above 32°F (0°C)
A9
Hot water temperature sensor/receiver mis-
Check that the water temperature sensor/receiver is
properly assembled on the horizontal of the hot
water pipe.*
(flashing) assembled (from control unit).
Note: if display shows “A9” flashing, the
appliance can be operated normally, but
performance may be affected.
Check that the water temperature sensor/receiver is
free from corrosion or moisture.*
C1
FAN rotation too low at start-up (from control
unit).
Check supply voltage.*
Check fan and connections.*
Check control unit.*
Check if vent terminal is blocked.*
C6
C7
FAN rotation too low at operation (from control
unit).
Check supply voltage.*
Check fan and connections.*
Check control unit.*
No rotational speed sensor signal from FAN
Check fan and connections.*
Check control unit.*
CA
E2
Water flow signal over specified maximum value Check water valve and flow sensor.*
Inlet temperature sensor fault
Check water temperature sensor/receiver and
connections.*
Check incoming water temperature to heater, it
must be above 32°F (0°C)
A2
Overheat protection fault
Check connections to the overheat protection.*
Check sensor continuity.*
Check heat exchanger sealings and walls.*
Table 5
* By installer or service technician only.
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Electrical diagram
6
Electrical diagram
Fig. 29 Electrical scheme
1
2
3
4
5
6
Intlet water temperature sensor
Ionization sensor
Water flow sensor
Over heat protection
Temperature limiter
Gas valve
7
Fan
8
Water valve
9
AC Plug
10
11
12
13
14
15
16
17
18
19
20
Ignition electrode
Display PCB
ON/OFF switch
Fuse T 2,5A
Fuse T 3,15A
Terminal block
Ground post
Outlet water temperature sensor
Connector for Anti-freeze
Anti-freeze device (Heating resistors)
Temperature sensor
Fig. 30 Anti-freeze electrical scheme
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250 SXO Functional scheme
7
250 SXO Functional scheme
Fig. 31 Functional scheme
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Interior components diagram and parts list
8
Interior components diagram and parts list
8.1 Interior components
Fig. 32 Components
1
Cover
2
3
4
5
6
7
8
On/Off switch
Reset button
LCD display
Program button
Temperature buttons
Flue gas collector
Mixer
9
Heat exchanger
Observation window
Inlet air duct
Control unit
Exhaust fan
Water valve
10
11
12
13
14
15
Gas valve
Fig. 33 Appliance overview
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Interior components diagram and parts list
8.2 Components diagram
Fig. 34 Components Diagram
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Interior components diagram and parts list
8.3 Parts list
Item
Description
Front cover
Reference
1
2
8 705 421 915
8 705 506 753
8 705 406 285
8 704 701 052
8 716 102 607
8 704 701 054
8 700 205 147
8 700 400 015
8 710 103 045
8 714 606 002
8 705 700 097
8 700 507 001
8 700 205 134
8 708 505 016
8 708 120 515
8 704 701 050
8 708 107 020
8 707 204 039
8 705 700 115
8 704 701 059
8 704 701 062
8 707 021 019
8 700 103 014
8 707 207 153
8 707 207 133
8 704 401 220
8 704 401 214
8 704 401 239
8 704 401 268
8 700 400 019
7 709 003 243
8 700 400 022
8 705 700 100
8 705 700 114
8 700 715 156
8 700 715 155
8 700 507 069
8 700 715 247
8 707 206 204
Shield
3
Heat exchanger
Heat exchanger top gasket
Clip
4
5
6
Heat exchanger bottom gasket
O-ring
7
8
Temperature sensor
Washer 1/2"
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Table 6
Wireform spring
Air inlet duct
Water filter
O-ring
Water valve with engine
Main burner
Fan / Burner gasket
Set of electrodes
Exhaust Fan
Gas / Air Mixer
Mixer / Fan gasket
Gas valve washer
Gas valve
Gas valve washer
Remote control
Control unit
Ignition cable
Cables / 24V
Cables
Power supply cord
Overheat cutoff fuse
Top vent cap
Freeze protection device
Flue gas collector
Flue gas collector collar
Cold water pipe
Hot water pipe
Air inlet screen
Crossover tube
Overheat sensor (ECO)
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Special adjustment for measuring and adjusting CO2 levels
9
Special adjustment for measuring and adjusting CO levels
2
The CO2 can only be adjusted by a certified gas
technician with a calibrated CO2 analyzer.
B. Measuring CO2 (Cover Installed):
B Open hot water taps to achieve a flow rate of at least
4 gallons per minute. (1 tub and 2 sinks should be
sufficient).
Caution: One factor that may affect
CO2 levels is improper gas pressure.
Please see Chapter 2.9 for the
procedure to measure gas pressure
and record your findings below:
B Record the CO2 reading in P2 below. (Analyzer
reading may take several minutes to stabilize).
B Press the
button until P1 appears. Unit will ramp
up to high fire and the flow should increase.
Static Gas Pressure:
“ WC
“ WC
B Record the CO2 reading in P1 on the next page.
P2 CO2 Reading:
% CO2
P1 Operating Pressure:
P1 CO2 Reading:
% CO2
The P1 minimum operating pressure is 5" WC for
Natural Gas and 11"WC for Propane. Do not proceed
in adjusting CO2 until pressure has been verified to be
at or above these levels, but not to exceed 14” WC.
Compare your readings to those found in table 1 under
the “With Front Cover” column. If CO2 readings are off
make adjustments as outlined below.
A. Once Pressure is good
Note: The “Without Front Cover” column gives
approximate values with the cover off to ease the
adjustment process. Final readings should be taken
with the cover on.
B Turn ON/OFF switch to the OFF (O) position.
B Remove plug by prying with a small flathead
screwdriver. Fig. 35
C. Adjusting CO2:
B Insert CO2 analyzer probe into the measuring port on
the front right of the vent cap at an angle. The tip of
the probe should be inserted to the middle of the vent
cap (approx 5" inserted).
Note: P1 adjustment will change the P2 reading.
Confirm the P1 value BEFORE adjusting the P2 level.
1. P1 CO2 level off:
Note: Vent cap must be in place in order to measure
CO2.
B Loosen yellow painted Philips screw (1) and cover
should rotate down (2) revealing a brass slotted
screw. Fig. 37.
B Adjusting the slotted screw counter clockwise will
raise P1 CO2 levels and clockwise will lower P1
CO2 levels. Adjustments to the slotted screw will
also change P2 CO2 levels.
2. P2 CO2 level off:
B Remove yellow painted #40 Torx cover from the front
of the gas valve. (Fig. 38) A plastic #40 Torx screw
will be revealed.
B Adjusting the plastic #40 Torx screw counter
clockwise will lower P2 CO2 levels and clockwise
will raise P2 CO2 levels.
Fig. 35
B While holding the Program (M) button, move the ON/
OFF switch to ON (I) position (see Fig. 36). As soon
as ‘188’ flashes on the display, release the Program
button. The display should now read P2.
Note: These screw adjustment are very sensitive and
may take several minutes to stabilize.
3. Verify both P1 and P2 are within the ranges specified
in table 1 under the “With Front Cover” column. Repeat
steps 1 and 2 as necesssary until CO2 values are within
the specified ranges.
Fig. 36
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Special adjustment for measuring and adjusting CO2 levels
D. Returning to Service:
1. Return slotted cover to original position.
2. Reinstall Torx cover.
3. Remove CO2 analyzer probe and reinstall plug in
exhaust collar.
4. Turn ON/OFF switch to the OFF (O) position and
then back to the ON (I) position.
5. Heater is ready for normal operation.
Without Front
Cover
With Front
Cover
Nat. Gas
9.1 ± 0.1 %
9.4 ± 0.1 %
LP Gas
Nat. Gas
9.7 ± 0.1 %
9.7 ± 0.1 %
LP Gas
max. input
min. input
P1
P2
Fig. 38
max. input
min. input
P1
P2
10.1 ± 0.1 %
10.4 ± 0.1 %
10.7 ± 0.1 %
10.7 ± 0.1 %
* Final reading must be confirmed with the front cover
on, CO2 levels increase when the cover is installed.
Table 7
Final Readings
P2 CO2 Reading:
% CO2
% CO2
P1 CO2 Reading:
Fig. 37
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10 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:
B Make sure you close all the taps after any use. Avoid
leaving the taps dripping. Repair any leaking tap.
B Whenever possible use taps with built-in water flow
limiters. They will give you the same comfort level
while saving water.
B 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).
For increased safety shut off the appliance from
the main water supply if your are staying away
from home for a considerable time.
At below freezing temperatures, disconnect the
plumbing connections to the heater and allow
the heater to drain.
To prevent any freeze damage, introduce short
bursts of compressed air (20-40 psi) through
these connections to remove the residual water
in the horizontal pipes and water valve.
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Twelve Year Limited Warranty
11 Twelve Year Limited Warranty
General
Service Labor Costs
Aquastar water heaters are warranted by the
Manufacturer (BOSCH) through Controlled Energy
Corp. Controlled Energy Corp. (CEC) will furnish a
replacement heat exchanger and will furnish a
replacement of any other part which fails in normal use
and service within the applicable periods specified
below, in accordance with the terms of this warranty.
The CEC replacement will be warranted for the
unexpired portion of the original warranty. This warranty
will be valid only for water heaters in possession of the
original purchaser as recorded on the warranty card.
This warranty does not cover any labor costs
associated with service, removal or re-installation of
part(s). All such costs must be borne by the Purchaser.
Additionally, this warranty does not cover any labor
costs associated with service, removal or re-installation
of the original water heater or a replaced water heater.
NOTE: the water heater must be free of
damaging scale deposits and not subject
i
to gas pressures greater than those
shown on the rating plate, which must not
be altered, defaced or removed.
The Heat Exchanger
How to Make a Claim
If the heat exchanger fails within twelve (12) years after
the original installation and operation, CEC will furnish
a replacement heat exchanger. However, if the water
heater is installed in other than a single family dwelling,
this heat exchanger warranty is limited to two (2) years
from date of original installation and operation.
Any claim for warranty parts should be made by the
original installer or service person to the local dealer,
distributor or to CEC. If CEC, please contact the
Technical Support Department:
Controlled Energy Corp.
340 Mad River Park
Exceptions
This warranty will not apply:
Waitsfield, VT 05673
1. to defects or malfunctions resulting from failure to
properly install, operate or maintain the unit in
accordance with the printed instructions provided;
Phone: 800-642-3111
2. to damage or abuse, accident, neglect or freezing
and other acts of nature;
In most cases, the dealer or distributor will be able to
promptly honor your claim and subsequently notify
CEC. However, all replacements are made subject to
validation by CEC of in-warranty coverage. The
damaged or defective item must be made available in
exchange for the replacement.
3. to damage resulting from operation with either the
flame sensor rod or overheat sensor removed;
4. to failure of the heat exchanger resulting from the
operation of the water heater in a corrosive
atmosphere or at water temperatures exceeding the
maximum rating, or if the water heater is not supplied
with potable water;
Miscellaneous
No one is authorized to make any other warranties on
behalf of CEC. It is expressly understood that the
replacement warranty of CEC shall be in lieu of any and
all other warranties, express or implied, including
warranties of merchantability or fitness for a particular
use or purpose, and further that CEC shall not be liable
for any loss or damage directly or indirectly arising from
the use of the hot water heater, or for any consequential
damages arising from such use (including damages
from water leakage). CEC’s sole liability with respect to
any defect shall be for the replacement of the defective
part(s). Some states do not allow such limitations and
exclusions, so the above may not apply to you.
5. to defects or damage cause by any attachment
or modification, including any energy-saving device.
All Other Parts
If any other part fails within two (2) years after original
installation and operation, CEC will furnish
replacement part free of charge.
a
Shipping costs
In addition to supplying the replacement part(s), CEC
will provide ground service delivery for these parts.
Expedited or upgraded shipping will be charged to the
customer.
This warranty gives specific legal rights. You may also
have other rights which vary from state to state.
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6 720 607 440
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Ins taller Checklis t, to be performed by ins taller upon installation
S erial Number
___ ___ ___ ___ ___ ___ ___ ___
(8 digit serial number is located on rating plate on right side panel)
G as Pressure R eading*
B uilding W ater Pressure
Average W inter Temperature
Average S ummer Temperature
Installing C ompany
Installer name
S tatic__________
Operating__________
__________ R ange if on W ell system __________
__________
__________
_____________________________________________
_____________________________________________
_____________________________________________
_____________________________________________
Address
Phone
* S ee C hapter 3.6 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
VULC ANO Termodomésticos S .A.
Estrada de C acia
3801 - 856 Aveiro - PO R TUG AL
Recycled paper
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