Sure Flame S2200D User manual

Sure Flame Products
A Divison of Haul-All Equipment
4115 - 18 Avenue North
Lethbridge, Alberta T1H 5G1
www.sureame.ca
P/N 974-9246
Rev: 5.00 Jan 20, 2022
Operation and Maintenance Manual
Model No. S2200D
CONSTRUCTION HEATER
2,250,000 Btu/h
WARNING
Read and follow all installation, and operating
instructions before rst use of this product.
Retain these instructions for future reference.

S2200D Operation and Service Manual
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The heater is designed and approved for use as a
construction heater under CSA 2.14. The primary
purpose of construction heaters is to provide tem-
porary heating of buildings under construction,
alteration, or repair and to provide temporary
emergency heat. Properly used the heater provides
safe economical heating. Products of combustion
are vented into the area being heated.
The heater is not designed as an Unvented Gas
Fired Room Heater under ANSI-Z21.11.2 and
should not be used in the home.
ANSI A119.2(NFPA 501C) Recreational Vehicle
Standard prohibits the installation or storage of
LP-Gas containers even temporarily inside any
recreational vehicle. The standard also prohibits
the use of Unvented Heaters in such vehicles.
Read This Warning First !
Gas inspection authorities in Canada require
that the installation and maintenance of heaters
and accessories be accomplished by qualied
gas tters.
Installation must comply with CAN/CGA-B149.1
Natural Gas and Propane Installation Code.
We cannot anticipate every use which may be made
for our heaters. CHECK WITH YOUR LOCAL
FIRE SAFETY AUTHORITY IF YOU HAVE
QUESTIONSABOUTLOCALREGULATIONS.
Other standards govern the use of fuel gases and
heat producing products in specic applications.
Your local authority can advise you about these.
Failure to comply with the precautions and
instructions provided with this heater, can
result in death, serious bodily injury and
property loss or damage from hazards of
re, explosion, burn, asphyxiation, carbon
monoxide poisoning, and/or electrical
shock.
Only persons who can understand and
follow the instructions should use or service
this heater.
If you need assistance or heater information
such as an instruction manual, labels, etc.
Contact the manufacturer.
GENERAL HAZARD WARNING
Fire, burn, inhalation, and explosion
hazard. Keep solid combustibles, such as
building materials, paper or cardboard,
a safe distance away from the heater as
recommended by the instructions. Never
use the heater in spaces which do or may
contain volatile or airborne combustibles,
or products such as gasoline, solvents,
paint thinner, dust particles or unknown
chemicals.
WARNING
Not for home or recreational vehicle use.
WARNING

S2200D Operation and Service Manual
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WARNING
Air Quality Hazard
• Do not use this heater for heating human living quarters.
• Use of direct-red heaters in the construction environment can result in exposure to levels
of CO, CO2, and NO2 considered to be hazardous to health and potentially life threatening.
• Do not use in unventilated areas.
• Know the signs of CO and CO2 poisoning.
◦ Headaches, stinging eyes
◦ Dizziness, disorientation
◦ Difculty breathing, feels of being suffocated
• Proper ventilation air exchange (OSHA 29 CFR 1926.57) to support combustion and maintain
acceptable air quality shall be provided in accordance with OSHA 29 CFR Part 1926.154,
ANSI A10.10 Safety Requirements for Temporary and Portable Space Heating Devices and
Equipment used in the Construction Industry or the Natural Gas and Propane Installation
Codes CSA B149.1.
◦ Periodically monitor levels of CO, CO2 and NO2 existing at the construction site – at the
minimum at the start of the shift and after 4 hours
◦ Provide ventilation air exchange, either natural or mechanical, as required to maintain
acceptable indoor air quality
USA 8-Hr Time weighted average Canada 8-hr time weighted average
(OSHA 29 CFR 1926.55 App A) WorkSafe BC OHS Guidelines Part 5.1
and Ontario Workplaces Reg 833
CO 50 ppm 25 ppm
CO2 5000 ppm 5000 ppm
NO2 3 ppm (Reg 833)
USA – Ceiling Limit (Short Term Canada STEL (15 minutes Reg 833/1
Exposure Limit = 15 minutes) hour WSBC) WorkSafe BC OHS
Guidelines Part 5.1 and Ontario
Workplaces Reg 833
CO 100 ppm
CO2 15000 ppm (WSBC)
30000 ppm (Reg 833)
NO2 5 ppm 1.0 ppm (WorkSafeBC)
5.0 ppm (Reg 833)
• Ensure that the ow of combustion and ventilation air exchange cannot become
obstructed.
• As the building ‘tightens up’ during the construction phases ventilation may need to be
increased.

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Specications 5
Heater Installation 6
Installation for Propane Applications 7
Installation for Natural Gas Applications 7
Keypad and Display 8
Menu 10
Operating Instructions 12
Common Installation and Operational
Problems 13
On-site Safety Problems 13
Preventative Maintenance 14
Troubleshooting 15
Wiring Diagrams 22
Replacement Parts 26
Table of Contents
FOR YOUR SAFETY
DO NOT USE THIS HEATER IN A SPACE WHERE
GASOLINE OR OTHER LIQUIDS HAVING
FLAMMABLE VAPOURS ARE STORED OR USED.

S2200D Operation and Service Manual
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Model No.
S2200D Construction Heater
Certication
Gas Fired Construction Heaters, CSA 2.14
Fuel
Natural Gas or Propane Vapour
Input Rating
Maximum (Second Stage)
2,250,000 Btu/h (659 kW)
Minimum (First Stage)
1,950,000 Btu/h (571 kW) Propane
1,650,000 Btu/h (484 kW) Natural Gas
Operating Temperature
Minimum -30°C (-28°F)
Burner Orice Size
40 DMS x 45 holes
42 DMS x 33 holes
Electrical Rating
Varies - Rating determined as stated on the
Specication Label and the Electric Motor on
the heater
Supply Pressure to Regulator
Propane & Natural Gas
Minimum: 12” WC (3.0 kPa)
Maximum: 5 psi (34 kPa)
Pressure to Manifold
Propane
Minimum: 0.4” WC (100 Pa)
Maximum: 0.7” WC (170 Pa)
Natural Gas
Minimum: 2” WC (500 Pa)
Maximum: 4.6” WC (1.1 kPa)
(Minimum inlet pressure is for purpose of input
adjustment)
Weight
860 lbs (390 kg)
Specications
Altude Natural Gas Propane
0' - 2000' 4.6” w.c. (1150 Pa) 0.7” w.c. (175 Pa)
2500' 4.1” w.c. (1025 Pa) 0.6” w.c. (150 Pa)
3000' 4.1” w.c. (1025 Pa) 0.6” w.c. (150 Pa)
3500' 4.0” w.c. (1000 Pa) 0.6” w.c. (150 Pa)
4000' 3.9” w.c. (975 Pa) 0.6” w.c. (150 Pa)
4500' 3.8” w.c. (950 Pa) 0.55” w.c. (125 Pa)
Manifold Pressure Altitude Adjustment

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The Sure Flame Model S2200 is a direct red
gas heater intended to be used primarily for the
temporary heating of buildings under construc-
tion, alteration, or repair. Since all the products
of combustion are released into the area being
heated, it is imperative that adequate ventilation
is provided. The ow of supply air must not be
obstructed in any way.
1. Install the heater in a horizontal position at
least 10 feet (3 m) from any LP-gas contain-
er. The front outlet must be at least 20 feet
(6 m) from any LP-gas container. Allow the
following clearances from any combustible
material or fuel containers:
Outlet: 25 feet (7.6 m)
Sides: 3 feet (0.9 m)
Intake: 3 feet (0.9m)
Top: 4 feet (1.2 m)
Duct: 1 foot (0.3 m)
Floor: Noncombustible
Also make sure that no ammable vapours
are present in the space where the heater is
being used.
2. When connecting the heater to a natural gas
or propane supply line ensure that the pres-
sure at the heater inlet is within the specied
range. Excessive pressure (over 5 psig or
34 kPa) will damage the controls and void
the warranty.
3. Visually inspect the supply hose assembly
and ensure that it is protected from trafc,
building materials, and contact with hot sur-
faces. If it is evident that there is excessive
abrasion or wear, or the hose is cut, it must
be replaced.
4. After installation, check the hose assembly
for gas leaks by applying a water and soap
solution to each connection.
5. Connect the heater to an adequate electric
power supply as specied on the Heater
Specication label and the Electric Motor
plate.
6. For protection against shock hazard the sup-
ply cord should be plugged directly into a
properly grounded receptacle in compliance
with the
Canadian Electrical Code,
CSA C22.1, Part 1.
The appliance area should be kept clear and free
from combustible materials, gasoline, and other
ammable vapours and liquids.
Ensure that the ow of supply air is not ob-
structed.
The installation and operation of the heater shall
comply with the code requirements specied by
the authorities having jurisdiction.
General criteria for the installation and use of
construction heaters may be found in the appli-
cable sections of the
Natural Gas and Propane Installation
Code,CSA B149.1
The installation and maintenance of the heater
must be accomplished by a qualied service
person.
This heater is approved for use without
ductwork, or with up to 40 feet of 24” square
ductwork. Only ductwork supplied by the man-
ufacturer should be used with this heater.
When using the heater without ductwork,
securely fasten the outlet screen in the down
position.
Heater Installation

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1. When installing the heater for use with pro-
pane gas, ensure that the gas selector valve is
LOCKED in the propane position.
2. The supply container MUST be equipped
with a suitable UL listed gas pressure reg-
ulator. This is essential to reduce the gas
pressure to a safe transmittable pressure that
does not exceed the maximum input pressure
of the heater.
3. Arrange the supply system to provide for
vapour withdrawal from the operating tank.
Supplying liquid propane to the heater is
dangerous and will damage the components.
4. Ensure that for the surrounding temperature
the size and capacity of the propane supply
tank is adequate to provide the rated Btu/h
input to the heater.
Installation For Natural Gas Applications
Installation For Propane Applications
1. When installing the heater for use with nat-
ural gas, ensure that the gas selector valve is
set in the natural gas position.
2. Ensure that the supply is equipped with a
suitable UL listed gas pressure regulator
to limit the gas to a pressure that does not
exceed the maximum inlet pressures of the
heater.
5. Turn off the propane supply valve at the tank
when the heater is not in use.
6. The installation must conform with local
codes, or in their absence, with the follow-
ing:
CAN/CGA - B149.1 Natural Gas and Pro-
pane Installation Code
7) When the heater is to be stored indoors the
propane tank must be disconnected from
the heater and stored in accordance with the
above mentioned National Standard.
3. The installation must conform with local
codes, or in their absence, with the follow-
ing:
CAN/CGA - B149.1 Natural Gas and Pro-
pane Installation Code.

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Keypad and Display
MENU SELECT/SAVESTART STOP
Heater status
Heater Mode
Green/On Light
Start/Clear Error Button
Red/Error Light
Stop Button Menu/ Exit Menu Button
Select/Save Button
Display Screen
Down Arrow/Menu
Navigation Button
Up Arrow/Menu
Navigation Button
Membrane Keypad
When heater is rst plugged in and the power selector switched on, the
screen rst displays the logo “SURE FLAME,” then displays the heater
model and software version currently installed, and nally the Status/
Mode/Run page.
Status
Status Description
OFF The heater goes to “OFF” when it is powered off. The
heater also goes to “OFF” when STOP button is pressed.
Heater does not start on its own when power is provided to
unit.
Standby When the start button is pressed and the heater is set to
work with thermostat but there is no call for heat the heater
will be in “Standby”. The mode that requires a thermostat is
“ON/OFF.”
Ignition This status will always show when burner is ring up after a
call for heat through thermostat or “CONST ON.”
ON Burner is on and ame has been established.

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Errors
Occasionally errors and warnings may be displayed on the screen. If
more than one error is triggered the arrow keys can be used to scroll
between the errors and warnings. The top right displays the current and
total number of errors with the most recent being shown rst. To reset
the errors and warnings hold down the start button for 3 seconds. If the
errors and warnings do not reset then the underlying problem must be
addressed rst. The error or warning can then be successfully reset.
When errors are triggered the error is displayed, the heater will shut
down and the red light on the keypad will be turned on. When a warning
is triggered it will display the message but it will not impede the function
of the heater.
Warning /Error Message Example:
MENU SELECT/SAVESTART STOP
WARNING 006 1/3
Critical Low
System Voltage
HOLD to RESET
Error/Warning Message
Error/Warning
Error/Warning no. (see table) Displaying Message 1 of 3
Reset Error/Warning
Instructions (hold
for 3 seconds)

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Statistics
To access Statistics press the MENU button and scroll using the arrow
keys to Statistics and press SELECT/SAVE.
Page Descrition
1 PCB voltage in PCB system voltage
2PCB system voltage Circulation blower hours
3PCB software version Heater Serial Number
Menu
Menu Item Description
Heat Mode Allows the switching between different heat modes and
fan only mode.
Statistics In this section the software version, heater serial num-
ber, voltage, ame rod signal, burner and blower hours
of function can be viewed.
Error log The past 50 errors are saved here and can be viewed.
Settings Date and time can be set and viewed here. Language
can be set here.
To access the menu press the MENU button and scroll using the arrow
keys. Press SELECT/SAVE to select an option. Press MENU to back out
of the menu.
Heat Modes
To access heat modes, press the MENU button and scroll using the arrow
keys to Heat Mode and press SELECT/SAVE.
Heater Mode Description
HI/LO/OFF Heater switches between high, low and off based on
thermostat.*
HI/LO Heater switches between high and low based on
thermostat.
HI/OFF Heater switches between high and off based on ther-
mostat.
LO/OFF Heater switches between low and off based on ther-
mostat.
Cnst. ON/HI Heater runs all the time on high and disregards ther-
mostat. No jumper is required.
Cnst. ON/LO Heater runs all the time on low and disregards thermo-
stat. No jumper is required.
Fan Only Circulation fan runs continuously. No heat.
*With a jumper instead of thermostat the heater runs constantly on high.

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Settings
To access Settings, press the MENU button and scroll using the arrow keys
to Settings and press SELECT/SAVE.
Setting Description
Units Choice between metric and imperial units (not applicable
to this heater).
Date/Time Set date and time here.
Language Set Language here.
Set Date/Time
Access the settings menu. Scroll using the arrow keys to “Date/Time”
and press the SELECT/SAVE. To set the date or time hold the SELECT/
SAVE until the month starts blinks. To move from month to day or year
press SELECT/SAVE until you reach the desired position. Use the arrow
keys to set the new value. Press SELECT/SAVE to move to the next val-
ue to be changed. To save changes press and hold SELECT/SAVE until
the seconds start counting up again.
Error Log
To access the Error Log press the MENU button and scroll using the
arrow keys to Error Log and press SELECT/SAVE.
Scroll up and down using the arrow keys to view the error history from
most recent to oldest.
To clear the error log press and hold the SELECT/SAVE till the rst line
of the Error Log reads “End of Error Log”.
Set Language
Access the settings menu. Scroll using the arrow keys to “Language” and
press the SELECT/SAVE.
Scroll up and down using the arrow keys to the desired language setting
and press SELECT/SAVE to set the new language. An asterisk * should
appear next to the selected language. Press MENU button twice to return
to status page.

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Start
1. Set GAS SELECTOR VALVE to gas being used (dual-fuel models).
NOTE: When using Propane Gas the Selector valve must be
locked in position.
Natural Gas Propane
2. Ensure the ring valve (manual valve nearest the burner) is in the “ON”
position.
3. Connect power. Use appropriate power supply as indicated by the
specication label and the electric motor plate.
4. Open gas supply.
5. Select desired heat mode (see above).
6. Press the START button.
7. If the thermostat is calling for heat then the status will change to “Ig-
nition.” Blower will start up and after about 30 seconds the burner will
ignite.
8. After ame is established, the status will change to “ON” with one or
two ame symbols depending on whether the heater is in high or low
re (2 for high or 1 for low).
Stop
1. Press the STOP button.
2. Status will change to “OFF.”
3. Heater will go through shutdown phase. Burner will be in post purge
for approximately 20-30 seconds. Main fan will shut down when heater
has cooled down enough.
Warning: Do not stop the heater by turning off the main electrical
switch. Heat accumulated in the heater can damage burner or safety
equipment.
Operating Instructions

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Low Voltage
This is one of the most common problems
and is usually the result of the supply cord
having too small a wire gauge for its length.
Low voltage results in the motor overheat-
ing, burnt relay contacts, or a relay that will
not make contact.
Supply Line Too Small
Insufcient Vaporization At Supply
Normally caused by too small size of supply
tank.
Improper Gas Supply Pressure
Usually a result of supply pressure being
too high because of improper or lack of
regulation.
Common Installation And Operational Problems
Dirty Gas Supply
Dirty gas can cause strainers to plug or
form a build-up in the burner orice.
Lack Of Preventative Maintenance
Heaters must be cleaned as required, espe-
cially when used in a dirty environment.
Improper Supply Of Fresh Air
It is normally recommended that the intake
air of the heater be taken from outside the
enclosed area. This provides a slight pres-
surization and prevents any problems associat-
ed with recirculation.
Bypassing of Defective
Components
This is a potentially dangerous problem
which saves short term expense at the risk
of a large future cost. Any heaters found
in this condition should be removed from
service immediately
Improper Enclosures
When heaters are installed partially to the
outside for fresh air intake, strict adherence
must be made to the minimum clearance to
combustibles given on the instruction plate.
Wood framing around a heater is a hazard
and should no be used.
On-site Safety Problems
Supplying Liquid Propane To Heater
This heater is not intended to burn liquid
propane. To minimize the damage, shut off
the gas supply and let the heater run until all
of the liquid in the lines has been burnt.

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Sure Flame Construction Heaters are built to
withstand the rigours of operating on construc-
tion sites, for mining applications, and a multi-
tude of other locations where heaters are used.
To maintain the reliable performance required
it is necessary to do a certain amount of regular
maintenance.
The heater should be inspected before each
use, and at least annually by a qualied service
person.
Visual Checks
The following items should be checked for
excessive wear or damage:
1. Cords and Connectors
2. Wiring and Conduit
3. Heater Shell (including heat shield), Blow-
er Housing and Control Box
4. Blower Drive Belts and Bearings
5. All Screens and Guards
Preventative Maintenance
Burner
Flame Rod and Insulator - Clean with soap
and water or solvent on a routine basis. Any
build up on burner should also be removed at
this time.
U.V. Flame Sensor - Clean the bulb with a soft
cloth.
Ground Wire - Ensure that the ground wire is
secured to the burner. This is necessary for the
ame detection system to operate.
Spark Plug - Clean with solvent and check
spark gap.
Flame Safeguard Control
The Flame Safeguard Control should be cleaned
using alcohol. Do not use any other liquid or
aerosol spray cleaners.
Motor
Motors equipped with oil cups should require
only a few drops of clean, light machine oil
every year. Motors not equipped with oil cups
are tted with sealed bearings and no oiling is
required.
Blower
Check for dust or dirt build up on fan blades.
Check the tightness of the set screw and run the
heater to check for fan vibration.

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Trouble Shooting
The troubleshooting section has been divided into ve tables. Choose the
appropriate table from the list below:
Chart A – Fan does not start. Flame does not start,
Chart B – Fan starts. Flame does not start
Chart C – Fan starts. Flame starts but goes out after a few seconds,
Chart D – Fan starts. Flame starts, but fails during operation
Chart E – Other problems
A-Fan does not start. Flame does not start
Green
Light
Red
Light
Error
Code
Symptoms Possible Problem
OFF OFF No Dis-
play
NO PCB LED lights (3 solid 1
ashing). No power on second-
ary side of step down transform-
er (check for 120VAC on “0”
to “115V” terminals of the step
down transformer)
No electrical supply
Main power switch off
Transformer failure
Control box circuit breaker is
OFF
Overload in control circuit
High voltage - wrong power
source
Wrong voltage setting on the
transformer
OFF OFF Display
on. No
Error
code
Heater will not start. No green
light. Secondary side of step
down transformer has 120VAC.
PCB LED lights on.
Keypad failure
OFF OFF Display
on. No
error
code.
Display does not show “Sta-
tus” screen. PCB LED lights
on.
PCB failure
Software corrupted
OFF OFF Display
on. No
error
code
Fan turns on right away and
doesn’t stop after power is
switched on without pressing
START .
PCB hardware failure.

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Green
Light
Red
Light
Error
Code
Symptoms Possible Problem
OFF ON 126 Heater does not start after
pressing START . Siemens
briey displays “P21-P22-
LOC3” in sequence.
Fan motor failure
Fan motor contactor failure
PCB hardware failure
Broken fan belt
Fan failure or foreign object in
fan mechanism.
OFF ON 126
151
Heater does not start after
pressing START . Siemens
displays “P21-P10-OFF” or
“P10-LOC5” in sequence.
Air switch contacts welded
Air switch failure
OFF ON 126 Siemens displays “P04” with
ashing red and green lights.
Then it displays “LOC4” with
solid red.
Both solenoid valves fail to
close.
Flame not extinguished.
ON OFF NONE No reaction from heater. Dis-
plays “Status: Ready”. Jump-
er not plugged in for “HI/LO/
OFF”, “HI-OFF” , or “LO-OFF”
modes.
No call for heat from thermo-
stat
Defective thermostat
ON OFF Warning
307
Heater does not start Defective thermostat
OFF OFF Warning
005
Heater does not start Low supply voltage.
Transformer wired for incor-
rect voltage.(Low)
OFF OFF Warning
004
Heater does not start High voltage.
Transformer wired for incor-
rect voltage. (High)
OFF ON 153 Heater does not start. Sie-
mens displays”P21-P22-P10-
OFF” in sequence.
Flame controller defective
Wire disconnected from ter-
minal X2-01 -3 on Siemens.
OFF ON 126 Heater does not start. Sie-
mens displays”P21-P22-
LOC3” in sequence.
Fan motor/overload defec-
tive
OFF ON 147 Heater does not start and will
not reset.
Heater on unstable/inclined
platform
Heater fell over on its side
PCB failure

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B-Fan starts. Flame does not start
Green
Light
Red
Light
Error
Code
Symptoms Possible Problem
OFF ON 126 Siemens displays “P20-
P21-P22-LOC20” in se-
quence.
Signal to X5-01-2 disconnected
Gas inlet pressure switch fail-
ure (when installed)
OFF ON 126 Siemens displays “P21-
P22-LOC3” in sequence
No air pressure indication
Air tube leaking or disconnected
Air switch adjusted too high
Air tubes plugged in wrong posi-
tion (“-“ instead of “+”)
Air switch defective (NO contacts
stay open when fan is working)
OFF ON 126 Siemens displays “P21-
P22-LOC3” in sequence.
PCB Failure
Remote air switch harness
defective or disconnected
OFF ON 126 Siemens displays” P21-
P22-P30-P40-P42-LOC2”
Inlet pressure too high (over 5 psi)
regulator damaged
Solenoid valve damaged or valve
electric circuit defective
Gas pressure too low
Manual cut off valve closed
Interruption in ame continuity
Strainer plugged or dirty
OFF ON 127 Siemens displays “P21-
P22-P30-P10-OFF” in
sequence.
fan motor/overload defective
OFF ON 126
155
Siemens displays “P21-
P22-P30-P40-P42-LOC 2“
High limit switch failure

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C-Fan starts. Flame starts but goes out after a few seconds
Green
Light
Red
Light
Error
Code
Symptoms Possible Problem
OFF ON 126
155
Siemens displays” P21-
P22-P30-P40-P42-LOC2”
UV Sensor failure
Flame Rod failure
Improper Grounding
Manifold pressure too high or too
low.
OFF ON 127 Siemens displays “P21-
P22-P30-P40-P74-P10-
OFF”
Fan belt too tight
Fan motor defective
Fan motor overload incorrectly
set or defective.
D- Fan starts. Flame starts but fails during operation
Green
Light
Red
Light
Error
Code
Symptoms Possible Problem
OFF ON 153 Siemens resets to “P01”
with orange and red ash-
ing on LED. “Critical Low
Voltage” or similar may
show in error history.
Too much load on power sup-
ply
Low Voltage
Long power lines or low gauge
power lines.
OFF ON 127 Siemens goes to “P74-P10-
OFF”. Noisy fan operation.
Overload on power relay.
No fan post-purge.
Damaged fan bearings
Fan belt too tight
OFF OFF N/A Scrambled or no display on
screen. Heater fails to stay
lit. Excessive motor noise
Poor quality power.
Dirty generator power.
OFF ON 126 Siemens displays “LOC7”.
Noisy burner operation. Ir-
regular ame. Heater turns
off
Burner orices plugged or dirty.
OFF ON 126 Siemens displays “LOC7”.
Heater starts ok but fails in
function
Propane tank too small - not able
to vaporize fast enough; tank
freezes up.
Too small of a hose, too long of a
hose, blocked hose; inlet pressure
too low
OFF ON 126 Siemens displays “LOC7”.
Yellow unstable ame that
extends out of fan.
POSSIBLE EXPLOSION
(when used with duct)
Liquid propane entering heater
Damaged regulator
Damaged solenoid valve

S2200D Operation and Service Manual
P/N 974-9246 Rev 5.00 Jan 18,2022 19
Green
Light
Red
Light
Error
Code
Symptoms Possible Problem
OFF ON 126 Siemens displays “LOC7”.
Combustion unstable, burner
fails to stay lit, and low outlet
air temperature
Changeover valve set to propane
when connected to natural gas
OFF ON 126 Siemens displays “LOC7”.
Combustion unstable burn-
er fails to stay lit, and high
outlet temperature
Changeover valve set to natural
gas when connected to propane.
OFF ON 126
156
Siemens displays “LOC 7”
Burner doesn’t cycle.
Heater runs through one
cycle and then turns off.
Heater High limit switch opens
Heater Hi limit switch failure – too
sensitive
OFF ON 126 Siemens displays “LOC 7” Interruption in gas delivery
Clogged lter or strainer
Defective safety solenoid valves
Gas regulator vent is plugged
UV sensor failure
OFF ON 147 Siemens displays “P74-
P10-OFF”. Fan undergoes
a short post purge then
stops.
Heater is tilted too much/unstable
Heater at on its side
PCB failure

S2200D Operation and Service Manual
P/N 974-9246 Rev 5.00 Jan 18,2022
20
E- Other problems
Green
Light
Red
Light
Error
Code
Symptoms Possible Problem
ON OFF N/A Blower impeller spins in re-
verse. Low volume air coming
from outlet with yellow ame
and unstable burner opera-
tion.
Wrong Phase (3 PH - reversed
phase)
Incorrect wiring on motor
ON OFF N/A Low temperature output. High
CO
Combustion unstable and/
or burner turns off moments
later.
Changeover valve set to propane
when connected to natural gas (if
applicable)
ON OFF Warning
025
High temperature output.
Burner cycles to low re (for
15 minutes) then off. Burner
then cycles often and is on for
seconds.
Changeover valve set to natural
gas when connected to propane.
(if applicable)
Sensitive/faulty blower hi-limit
switch.
ON OFF N/A Heater will not turn off by
pressing the stop button
Stop switch (red) fails to close
ON OFF N/A No output temperature varia-
tion from low re to high re
Stage I valve not adjusted to a
lower value (if applicable)
Appliance regulator adjusted to a
lower value
Defective valve
Thermostat failure
ON OFF N/A Noisy fan operation. Yellow
ame and high CO generation
Fan belt too loose
Cracked belt
ON OFF N/A Noisy fan operation. High
vibration. Structural damage
to fan and/or bearing Damaged or unbalanced fan
blade
ON OFF N/A Burner cycles more often Outlet duct too long
ON OFF N/A Noisy operation. Heater body
vibration.
Heater not positioned on a level
surface
ON OFF N/A Static charge. Static shocks.
UV Flame detection works ok Improper grounding