Norcold N611V SERIES User manual

DO NOT install this refrigerator in below deck marine applications. Do not
install this refrigerator in fixed indoor cabin or other dwelling applications. This
refrigeratormustuseonlyNORCOLDdesignedandapprovedoutsideairintake
and exhaust ventilation for correct and safe operation. Any other ventilation
could cause lethal combustion exhaust fumes and/or explosive propane gas
fumes to be in the living area and/or below deck.
Publication No. 636355 A (15-01-2014)
© 2013 NORCOLD, INC. All rights reserved.
Service Manual
N811v Series
N611v Series
MODELS
!
WARNING
Gas / Electric Refrigerators
Questions?/Des questions?/¿Preguntas? 1-800-444-7210

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2
Refrigerator Service ManualN611v, N811v Models
CONTENTS
Introduction..................................................................................................3
About this Manual...................................................................................3
Model Identification.................................................................................3
Information Label....................................................................................3
Certification and Code Requirements.....................................................3
About Installation....................................................................................3
Replacement Parts.................................................................................3
TechnicalAssistance...............................................................................3
Model Identification.....................................................................................4
Cooling Unit Serial Number....................................................................4
SafetyAwareness........................................................................................5
Safety Notice...........................................................................................5
Attention Statements...............................................................................5
Safety Statements...................................................................................5
Specifications..............................................................................................6
Theory of Operation....................................................................................7
Overview.................................................................................................7
Cooling Unit............................................................................................7
Leveled Operation...................................................................................7
Gradual Decrease in Cooling Efficiency.................................................7
GasAbsorption System..........................................................................8
Electronic Controls.................................................................................. 9
Theory of Operation -Auto Modes ........................................................9
Background Operations........................................................................10
Fault Codes...............................................................................................12
Diagnostic Prechecks...........................................................................13
Fault Code Flash Patterns....................................................................13
Solid Red Indicator Light ................................................................13
Fault / Flash Pattern 2 Service Error.............................................. 14
Fault / Flash Pattern 3 Open High Limit .........................................14
Fault / Flash Pattern 4AC Relay Error........................................... 14
Fault / Flash Pattern 5 Flame On, Should Not Be On ....................14
Fault / Flash Pattern 8 LOW DC (1) Error ......................................15
Fault / Flash Pattern 9 LOW DC (2) Error ......................................15
Thermister Fault .............................................................................15
Door Fault.......................................................................................15
Blank Display..................................................................................16
LP Gas System ......................................................................................... 18
Pressure Requirements........................................................................18
Testing for LP Gas Leaks......................................................................18
Components..........................................................................................19
FlameAppearance................................................................................20
Burner Cleaning Procedure..................................................................21
Gas Lockout.......................................................................................... 23
Reset a Gas Lockout Condition -All Models.........................................23
Gas Safety Valve Test...........................................................................23
Electrical Requirements and Components................................................24
DC Voltage Requirements and Polarity................................................24
DC Power Wiring Requirements...........................................................24
AC/DC Converter as Power Source...................................................... 24
12VDC Ventilation Fan..........................................................................24
Cooling Unit............................................................................................... 26
Cooling System Monitoring...................................................................26
Troubleshooting Cooling Faults............................................................26
Refrigerant Leakage.............................................................................26
Disposal of Cooling Unit........................................................................26
Cooling System Diagnostic Flowchart..................................................27
Wiring Pictorial .....................................................................................29
Modes Of Operation..................................................................................30
Refrigerator Start-Up.............................................................................30
Refrigerator Shut-Down........................................................................30
Effects of HighAltitude on Propane Gas Operation.............................. 30
Effects of FreezingTemperatures on Refrigerator Operation...............30
Figures
Fig. 1 - Refrigerator Information Label Location ..............................4
Fig. 2 - Cooling Unit Bar Code Label Location................................. 4
Fig. 3 - GasAbsorption System........................................................8
Fig. 4 - Flash Patterns.................................................................... 13
Fig. 5A - Thermistor ....................................................................... 16
Fig. 5B - Thermistor in Ice.............................................................. 16
Fig. 6 - Continuous 12-Volt ............................................................17
Fig. 7 - Switch 12-Volt .................................................................... 17
Fig. 8 - LP Gas System Components............................................. 18
Fig. 9 - Solenoid Gas Valve............................................................19
Fig. 10 - LP15 OrificeAssemblies ..................................................19
Fig. 11 - Burner...............................................................................19
Fig. 12 - Burner Tube...................................................................... 19
Fig. 13 - Flue and Components...................................................... 20
Fig. 14 - Flue Baffle........................................................................ 20
Fig. 15 - FlameAppearance...........................................................20
Fig. 16 - Drip Cup and Burner Box Cover.......................................22
Fig. 17 - Burner and Components.................................................22
Fig. 18 -AC Power Cord................................................................. 25
Fig. 19 - Fan Mounted on Top ofAbsorber Coil..............................25
Fig. 20 - Fan Thermostat................................................................ 25
Fig. 21 - Fan with Installed NORCOLD Fan Kit.............................. 25
Fig. 22 - NORCOLD Fan Kit Wiring Pictorial................................. 25
Fig. 23 - Reset Pushbutton.............................................................26
Fig. 24 - Cooling System Diagnostics............................................. 27
Fig. 25 - Wiring ..............................................................................29
Fig. 26 - Wiring ..............................................................................29

www.norcold.com/cda 3 N611v, N811v ModelsRefrigerator Service Manual
About this Manual
This service manual provides maintenance, diagnostic, and
repair information for NORCOLD®models N611v, N811v
gas absorption refrigerators. It is a reference tool designed
for technicians who are knowledgeable in the theory and
operation of gas/electric absorption refrigerators, liquefied
petroleum (LP) gas–propane–systems, and AC/DC electrical
systems as installed in a variety of recreational vehicles (RV).
All information, illustrations, and specifications contained in
this publication are based on the latest product information
available at the time of publication. NORCOLD®reserves the
right to make changes at any time without notice.
Model Identification
Models N611v and N811v are 2-way refrigerators that operate
on AC power or LP gas.
Letter(s) appended to the model number identify factory
installed accessories. See Fig. 1.
Information Label
The information label is located in the upper right corner of the
fresh food compartment just below the divider. See Fig. 1. The
label provides the following information:
• Serial number.
• Model number.
• LP gas (propane) pressure.
• Btu/h.
• AC voltage and amperage.
• DC voltage and amperage.
• Design certification.
• Vent kit requirement.
INTRODUCTION
Certification and Code Requirements
NORCOLD®N611v, N811v gas/electric absorption refrigerators
are certified under the latest edition of ANSI Z21.19B
standards for installation in mobile homes or recreational
vehicles, and with the Canadian Standards Association CAN/
CGA-1.4-M94.
Electrical components are compliant.
About Installation
Refrigerator installation must conform with the N611v, N811v
Installation Manual for the NORCOLD®limited warranty to be
in effect. Installation must also comply with applicable local
codes and standards set by the relevant certification agency.
Replacement Parts
Use only authorized NORCOLD®replacement parts.
Generic parts do not meet NORCOLD®specifications for
safety, reliability, and performance. The use of unauthorized
aftermarket or generic replacement parts voids the
refrigerator's limited warranty coverage.
Technical Assistance
If unable to resolve technical issues using the information
provided in this manual, technical support is available through
NORCOLD®Customer Service Center:
Telephone: [phone].
Fax: [phone]
World Wide Web: www.norcold.com.
The following information is required to process technical
support requests; refer to the following page:
• Refrigerator Model Number
• Refrigerator Serial Number
• Refrigerator Cooling Unit Serial Number
• Recreational Vehicle (RV) Make/Model/Year

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Refrigerator Service ManualN611v, N811v Models
Fig. 1 - Refrigerator Information Label Location
MODEL IDENTIFICATION
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D
E
S
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G
N
C
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R
T
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F
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D
NORCOLD
SA
Serial Number
Model Number
x.xx
LBS.
test pressure
xxx VOLTS - AC xx HZ
x.xx AMPS xxx Watts
xx VDC xx HZ
x.x AMPS xx xx Watts
Group Code
Input Pressure
BTUH
Refrigerant
Certied
Explanation
1N = Norcold
2X = Sequence number indicating custom features
36 or 8 = Approximate storage volume in cubic feet
4X = Sequence number indicating custom features
5Models available. Blank = 2-Way operation
6Icemaker unit. Blank = does not have ice maker, IM = has icemaker
7Blank = Is not equipped for low ambient operation, C = Is equipped for low ambient operation
8Door design: Blank: Insert panel doors, SS: Stainless steal wrapped, BK: Black wrapped, WH:
White wrapped, WPM: Pewter Royce wrapped
9Fan: Blank: No fan, F = Equipped (1) Fan, F2 = Equipped (2) Fans, V = Equipped (1) High
Velocity Fan
10 Door swing: L = Left-hand door swing, R = Right-hand door swing
11 P=Black acrylic door panels
12 Packaging Type: Blank: Corrugated packaging, T = Returnable packaging tray, M6 = 6-unit
multi-pack
NX610.3 IM C BK X R P T
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D
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S
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N
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T
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F
i
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SA
N
ORCOLD
x
x
x
x
xx
x
x
x
x
x
x
x
xx
x
x
x
x
x
x
xx
x
x
x
x
Serial Number / Model Number Location
A
B
C
D
EF
G
A. Serial Number
B. Model Number
C. Group Code
D. Btu/h
E. Amount of refrigerant in cooling
unit
F. AC Voltage/amperage
G. DC Voltage/amperage
Fig. 2 - Cooling Unit Bar Code
Label Location.
Be sure to have the cooling unit serial
number available if you need technical
support on this component.
1167359
NORCOLD
Cooling Unit Bar Code Location
Cooling Unit Serial Number
The cooling unit serial number appears on the cooling unit bar
code label. The label is affixed to the surface of the cooling
unit leveling chamber.
Note: The actual refrigerator label specifies the features applicable to that unit.

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Safety Statements
Do not modify, alter, or equip the refrigerator to the use
of any other fuel (natural gas, butane, etc.). N611v, N811v
refrigerators are designed and equipped for the use of LP
gas–propane gas–only.
Incorrect installation, adjustment, alteration, or maintenance
of the refrigerator can cause personal injury, property
damage, or both.
Do not smoke, light fires, or create sparks when working on
the propane gas system.
Do not use an open flame for leak testing any of the
propane gas system components. Propane gas is highly
flammable and explosive.
Always use two wrenches to tighten or loosen LP
gas connections. Damaged connections, piping, and
components create the potential for gas leaks.
All electrical connections and repairs to the refrigerator
must comply with all applicable codes. Refer to the
certification and code requirements section of the N611v,
N811v Installation Manual.
Do not work on live electrical circuits. Turn off AC power
and DC power sources before attempting to remove,
service, or repair any of the refrigerator's electrical or
electronic components.
Do not modify, bypass, or eliminate any of the refrigerator's
electrical components, electronic circuits, or propane gas
system components.
Do not wet or spray liquids on or near electrical
connections or electronic components. Most liquids,
including leak detection solutions, are electrically
conductive and pose the potential for an electric shock
hazard, short electrical components, damage electronic
circuits, and/or ignite a fire.
!
!
!
!
!
!
!
!
!
Do not use leak test solutions that contain ammonia or
chlorine. Ammonia and chlorine degrade copper and brass
components.
The cooling unit is a sealed system under pressure! Do
not try to repair or recharge the cooling unit. Do not bend,
drop, weld, drill, puncture, saw, or strike the cooling unit.
Handle a leaking cooling unit with extreme caution!
The cooling unit contains ammonia, hydrogen, and sodium
chromate. Ammonia can cause severe skin and eye burns.
Hydrogen is highly flammable, can ignite and burns with
an intense flame. Certain chromium compounds, such as
sodium chromate, are carcinogenic.
Do not use extension cords. Do not remove the grounding
prong from the refrigerator AC power cord. Do not use a
two prong adapter to connect the refrigerator to the AC
outlet.
Do not over-fuse electrical circuits. Use specified fuses
and AWG wire sizes. The specification section of this
manual provides fuse size information. Refer to the N611v,
N811v Installation Manual for the correct AWG wire size
specifications.
Prevent child entrapment! Before disposing of the
refrigerator, remove all doors and fasten all shelves with
retainers.
Some of the refrigerator's metal components have sharp
corners and edges. Wear hand protection, such as cut
resistant gloves, and exercise extreme care when handling
the refrigerator.
Make sure all hardware such as hinges and fasteners
(retaining screws, etc.), are properly fastened.
!
!
!
!
!
!
!
!
SAFETY AWARENESS
Safety Notice
It is not possible to anticipate all of the conceivable ways
or conditions under which the refrigerator may be serviced
or to provide cautions as to all of the possible hazards that
may result. Standard and accepted safety precautions and
equipment should be used when working on electrical circuits
and handling toxic or flammable materials. Safety goggles and
other required protection should be used during any process
that can cause material removal, such as when removing a
leaking cooling unit and cleaning components.
Attention Statements
The safety alert symbol
!
followed by the word WARNING or
CAUTION identifies potential safety hazards or conditions.
The safety alert symbol with the appropriate heading appears on
all safety labels posted on the refrigerator and safety awareness
notices presented throughout this manual.
!
CAUTION:
The above heading identifies hazards, which if
ignored can cause injury and/or property damage.
!
WARNING:
The above heading identifies hazards or conditions,
whichif ignored cancause seriousinjury, death,and/
or extensive property damage.

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Refrigerator Service ManualN611v, N811v Models
SPECIFICATIONS
N611v / N811v - Electronic
• Push Button - On/Off
• LED Indicator Lights
• Self-Diagnostic with Fault Indicators
• 2-Way Operation
Rough opening dimensions (H x W x D)
N611v---------------------------------------------------------------------------------------------------- 527/8 in.x231/2 in.x24 in.
N811v---------------------------------------------------------------------------------------------------- 597/8 in.x231/2 in.x24 in.
Decorative panels dimensions
Thickness-------------------------------------------------------------------------------------------------------------------------3/16 in.
Freezer door (H x W, both models) ----------------------------------------------------------------15 11/16 in. x 21 19/32 in.
Upper panel ---------------------------------------------------------------------------------------------- 15 11/16in. x 21 19/32in.
Fresh food compartment (HxW)
N611v --------------------------------------------------------------------------------------------------- 32 25/32 in. x 21 19/32 in.
N811v---------------------------------------------------------------------------------------------------- 39 25/32 in. x 21 19/32 in.
DC power
DC input voltage requirements--------------------------------------------------------------------------- 10.5VDC to 15.4VDC
DC Fuse, F1 on Power Board--------------------------------------------------------Automotive Blade, Type APR-5A-Tan
Divider Heater ------------------------------------3.1W/12VDC, (43Ωto 50Ω), Current ≈240mA to 279mA @ 12VDC
Gas Valve ------------------------------- 1.75W/12VDC, (74Ωto 92Ω), Current ≈130mA to 162mA @ 12VDC
Interior Light-------------------------------------------------GE #214, Miniature Automotive Light Bulb, ½ A@ 13.5VDC
AC power
AC input voltage requirements------------------------------------------------------------------------------108VAC to 132VAC
AC Fuse, F2 on Power Board ------------------------- AGC Series, 8A, FastActing, Glass Tube (1/4 in. x 1-1/4 in.)
AC Heater--------------------------------------------- 300W/120VAC, (46Ωto 51Ω), Current ≈2.3A to 2.6A @ 120VAC
LP gas (propane)
Operating pressure (Input pressure to gas valve)-----------------------------------------------------10.5 to 11.5 in. W.C.
Burner rating (Heat output)--------------------------------------------------------------------------- 1420 Btu/h @ 11 in. W.C.
Burner orifice size -----------------------------------------------------------------------------------------------------------------LP15
Gas ignition------------------------------------------------------------------------------------------ Electronic with flame sensing
Electrode tip-to-burner gap-------------------------------------------------------------------------------------------1/8 to 3/16 in.
Off-level operating limits
Side-to-side------------------------------------------------------------------------------------------------------3 degrees-maximum
Front-to-back----------------------------------------------------------------------------------------------------6 degrees-maximum
Temperature Sensor -------------------------------------------------- Thermistor, Fin mounted (10th fin from the right)

www.norcold.com/cda 7 N611v, N811v ModelsRefrigerator Service Manual
THEORY OF OPERATION
The N611v, N811v MODEL gas absorption refrigerators are
comprised of two separate systems that together allow the
refrigerator to cool. When performing service it is important
to have a basic understanding of each system and their
interaction with one another and how this interaction provides
for cooling/refrigeration.
These two “systems” are the:
• Cooling Unit
• Refrigerator Controls (Electronic Controls)
Overview
Cooling Unit
The cooling unit is a self-contained gravity flow absorption
refrigeration system. The refrigerant charge is a solution of
water, ammonia, sodium hydroxide, and sodium chromate.
In order to produce cooling a precise heat must be applied to
the boiler area which in turn initiates a chemical reaction that
extracts heat from the freezer and fresh food compartments,
thus providing "cooling."
This precise heat is supplied to the cooling unit via heaters
and/or a LP gas burner which are controlled by the
refrigerators electronic controls. The refrigerant transfers the
heat from the freezer and fresh food cabinets to the absorber
coils. At the absorber coils the metal surface absorbs the heat
and air flow over the external surfaces of the coils carries
the heat away. A more detailed description of the absorption
process can be found under the heading “Cooling Unit
Detailed Description" on the following pages.
A thermal air current created by the rising hot air flows out of
the enclosure through either a roof exhaust vent or a sidewall
exhaust vent (depending on installation). The flowing air
mass passes over the surface of the condenser fins where it
absorbs heat transferred from the ammonia vapors flowing
through the condenser. The thermal airflow process creates
a "chimney effect" that creates a continuous draft of cooling
and combustion air. The fresh air drafted by the chimney effect
removes rejected heat, supports combustion, and expels
the exhaust gases produced by the combustion process.
Obstructions, restrictions, or modifications to vents or the
enclosure will affect the heat absorption cycle. Poor cooling
unit performance may be due to:
• Loose insulation interfering with the ventilation process
• Construction material or debris left in the enclosure
• Insect screen covering vents
• Plastic sheeting covering vents
• Items stored in the enclosure
• Modifications to vents or enclosure
• No roof or sidewall vent openings
Leveled Operation
The circulation of the refrigerant through the cooling unit is
accomplished by gravity flow; therefore, the refrigerator must
be operated leveled. Off-level operation affects the flow of the
refrigerant through the cooling system. The maximum off-level
operation limits are:
• 3° (Degrees) from side-to-side
• 6° (Degrees) from front-to-back
Exceeding the maximum off-level limits can permanently
damage the cooling unit. The cooling unit or its performance is
not affected when the vehicle is in motion.
Gradual Decrease in Cooling Efficiency
A gradual decrease in cooling efficiency is not a clear
indication of cooling system failure. Other factors that affect
cooling efficiency include ventilation, the heat input, off-level
operation, lack of service and maintenance, inadequate
repairs, or unauthorized field modifications. If any of these
factors exist and are not corrected, a replacement cooling
unit will also perform inefficiently or fail. Step-by-step
troubleshooting is the best approach when dealing with
a gradual decrease in cooling. It is important to consider
that, though not efficiently, the cooling unit is working.
Troubleshooting should always begin by checking ventilation,
then thoroughly checking the cooling unit, and heat sources.
In the majority of reported cases, the problem is related to
the installation, which in turn hinders cooling unit ventilation.
Additionally, ambient air temperature plays a significant role
if the unit is not installed correctly. Incorrect installation can
lead to poor ventilation, which in turn relates to poor cooling
performance.
The unit's service and maintenance history should be
considered when checking a cooling unit for poor cooling
performance. The service history and the scope of service
work performed may lead directly to cause and resolution
of a cooling problem. The cooling unit has to reach normal
operating temperatures before troubleshooting can take place.
It takes an average of four hours for the refrigerant to reach
normal operating temperatures. The time frame to reach
operating temperatures depends on ambient air temperature.

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Refrigerator Service ManualN611v, N811v Models
Theory of Operation - cont’d.
A rich solution (RS) leaves the absorber vessel and passes
through the liquid heat exchanger to the bottom of the pump
tube. Utilizing an AC cartridge heater or a LP gas burner, a
precise heat is applied to this area which in turn causes the
temperature of the solution to rise. This temperature increase
causes ammonia and some water vapor to be driven out of
the solution, forming vapor bubbles which push columns of
liquid up the pump tube.
As these columns of liquid exit the pump tube the liquid falls
downward through the rectifier where the temperature is
increased causing additional ammonia vapor to be released.
The remaining liquid, now a weak ammonia-water solution
(WS), flows through the external shell of the liquid heat
exchanger where it transfers its residual heat to the rich
solution (RS) and enters the top of the absorber coil at a
reduced temperature. The ammonia-water vapor passes
through the water separator whose reduced temperature
causes any water vapor to condense and drop back down to
the boiler mixing with the existing weak solution (WS). The
ammonia vapor (AV) rises and enters the condenser where
it condenses (liquefies) into pure liquid ammonia (LA). The
liquid ammonia, via gravity, drops into the tubular coil of the
freezer and cabinet evaporators and wets the internal surface
of the tubes.
The weak ammonia-hydrogen gas that was previously
released at the top of the absorber coil passes over the
wetted surfaces of the evaporator tubing causing the liquid
ammonia to evaporate into the hydrogen. The now rich
ammonia-hydrogen gas mixture (RG) draws heat from inside
the refrigerator. The weight of the hydrogen-ammonia gas
mixture (RG) is heavier than that of the weak gas (WG).
Consequently, it falls through the gas heat exchanger into the
top of the absorber vessel. From this point it enters the bottom
of the absorber coil.
The rich ammonia-hydrogen gas mixture (RG) travels up
through the absorber and makes contact with the weak
solution (WS) traveling down from the top of the absorber. As
the weak solution (WS) drops through the absorber it absorbs
the ammonia from the rich ammonia-hydrogen gas mixture
(RS). The relatively pure hydrogen (WG) exits the top of the
absorber coils to the evaporator and the rich solution falls to
the bottom of the absorber vessel where the cycle starts again.
Gas Absorption System
Fig. 3 - Gas Absorption System

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Electronic Controls
A precise heat is applied to the boiler area of the cooling
unit causing a chemical reaction within the cooling unit that
ultimately results in the refrigerator cooling. The heat applied is
done so by means of:
• AC cartridge type heater positioned in heater wells
welded to the surface of the boiler
• LP Gas burner positioned below the boiler such
that the heat from the flame is directed across the
surface of the boiler
These heat sources are turned on/off via a factory preset
Auto mode. The unit will attempt to operate the heat source
requirements in the following order of priority:
• 1st Priority Choice - Auto AC Mode
While in the Auto AC Mode, the AC cartridge heater
is operated to provide heat to the boiler area of the
cooling unit.
• 2nd Priority Choice - LP Gas Mode
While in the Auto LP Gas Mode, the LP gas burner
is operated to provide heat to the boiler area of the
cooling unit.
A thermistor is mounted on the fin assembly located inside the
fresh food compartment. The thermistor acts as a temperature
sensor, reporting the temperature sensed to the optical
display. The optical display then relays this information to
the power board that then turns on/off the appropriate heat
source accordingly. The optical display board, power board,
thermistor, and other components within the refrigerator are
interconnected via a wire harness.
Theory of Operation -
Auto Modes
AC voltage is applied to the power board via the AC power
cord at terminals L1 (Hot) and L2 (Neutral). ThisAC voltage
will pass through the AGC Series, 8A, Fast Acting, Glass Tube
Fuse (F2) where it is then measured. This measurement is
communicated to the optical display board which determines if
the applied voltage is below or above 85VAC. If the voltage is
above 85VAC the determination is that AC voltage is available
and the optical display board will request the power board to
operate via the Auto AC Mode. If the voltage is below 85VAC
the determination is that AC voltage is NOT available and the
optical display board will automatically default to the Auto LP
Gas Mode and request the power board to operate via the
Auto LP Gas Mode (see below). If the control is not able to
establish a flame while operating in the Auto LP Gas Mode the
optical display board will:
Automatically default back to the Auto AC mode and wait for
AC voltage to return, displaying the following fault code
• Solid RED power indicator light
Auto AC Mode
When operating in the Auto AC mode the power board
measures the thermistor value and communicates it to the
optical display board. The thermistor, a temperature device
whose internal resistance goes down as the temperature goes
up, is connected to the power board via terminals P2-1 and
P2-6. The optical display board compares the actual thermistor
value to preset cut-in and cut-out temperature values. Should
the thermistor value fall below the cut-in value it will request
the power board to turn ON the AC heater relay (K2). Should
the thermistor value go above the cut-out value it will request
the power board to turn OFF the AC heater relay.
Anytime relay K2 is turned ON, AC voltage is applied to
the AC heater via the now closed K2 contacts. Anytime AC
voltage is applied to the AC heater, AC current is produced.
This AC current is measured by the power board and its
value communicated to the optical display board. The optical
display board determines if the AC current is within specified
limitations. If below the minimum specified limit, the optical
display board will automatically default to the Auto LP Gas
Mode and request the power board to operate via the Auto
LP Gas Mode.AC related faults (Voltage or Current) are not
displayed while operating in the Auto Mode of operation.

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10
Refrigerator Service ManualN611v, N811v Models
Auto LP Gas Mode
When operating in the Auto LP Gas mode the power board
measures the thermistor value and communicates it to the
optical display board. The thermistor, a temperature device
whose internal resistance goes down as the temperature goes
up, is connected to the power board via terminals P2-1 and
P2-6. The optical display board compares the actual thermistor
value to the factory preset cut-in and cut-out temperature
values. Should the thermistor value fall below the cut-in
value, the optical display board simultaneously requests the
power board to turn ON gas valve relay (K1) and high voltage
transformer (T1) outputs.
Anytime relay K1 is turned ON, 12VDC passes through the
now closed K1 contacts to terminal P1-10 of the power board
and out to the gas valve solenoid, energizing the gas valve.
With the gas valve energized, LP gas flows to the burner
tube. Simultaneously, energy pulses from the high voltage
transformer (T1) are carried out to the burner via the spark
sense electrode wire. As the energy pulses reach the end of
the electrode they jump across the gap between the electrode
and the burner creating sparks. The sparks ignite the LP gas
and a flame is established.
Via the flame rectification process a signal is then sent back to
the power board through the spark sense electrode wire letting
the power board know there is a flame present. Knowing
a flame is present; the power board deactivates the spark
output. At the same time; the power board communicates to
the display letting it know a flame is now present.
When the thermistor value reaches a particular cut-out value
the optical display will request the power board to turn OFF the
gas valve output, allowing the flame to extinguish. If for some
reason the flame goes away while there is a call for cooling,
the power board will turn the high voltage transformer back
on and attempt to re-ignite the propane. For safety reasons
the sparking at the burner (trial for ignition time) will last a
maximum of 30 seconds, at which time the gas valve/high
voltage transformer outputs will be turned off and the LP Gas
mode will be locked out.
The electronic controls will automatically default back to the
Auto AC mode and wait, indefinitely, for AC voltage to return.
The optical display board will display:
• Solid RED power indicator light
Theory of Operation -AutoAC and LP Gas Mode - cont’d.
Background Operations
Interior Light / Door Switch
The interior-light/door switch is a normally open reed switch
that is an integral component of the optical display board.
The magnetic pull from a permanent magnet located
underneath the top door trim maintains the reed switch
(N) contacts closed (light off) when the door is fully closed.
Opening the door breaks the magnetic pull, which in turn
causes the reed switch contacts to open (light on). The optical
display board senses the reed switch contacts are open and in
turn:• Requests that the power board turn ON the K4
relay. Anytime relay K4 on the power board is
turned ON, 12VDC passes through the now closed
K4 contacts to terminal P1-7 of the power board
and out to the interior light.
• Initiates a 2-minute timer that once timed out
requests the power board to turn off the K4 relay.
This prevents the interior light from being left on in
the event the door is not completely shut.
Anytime the door is sensed open the divider heater
output will be turned off.
NOTE
Theory of Operation - Interior Light / Door Switch
Verify:
• The interior light turns ON-OFF as the magnet is passed
below the optical control
• Contact Customer Service for further instructions.
Interior Light Test Procedure:
• Place a magnetic tipped screwdriver or small magnet
beneath the optical control
• Move the magnetic tipped screwdriver from side-to-side
as shown below
064
Art02410
Interior Light Test

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The divider heater is a low wattage heater used to reduce/
eliminate sweating on the surface of the plastic area between
the freezer and fresh food compartments, i.e. the divider
area. Due to the cooling nature of the refrigerator, the divider
area, especially on hot humid days, tends to be cooler than
that of the air around it. This causes the divider surface to
be below the dew point of the surrounding air and as a result
moisture or sweating develops. The divider heater, which is
not replaceable because it is foamed into place, consists of a
resistance wire placed atop one side of an adhesive backed
piece of foil adhered to the back of the divider area. Applying
12VDC to the resistance wire causes the wire to warm up. As
the wire warms up heat is transferred throughout the area of
the foil and subsequently the divider area. The added heat to
the divider area keeps the surface temperature above the dew
point of the surrounding air thus eliminating the occurrence of
sweating.
Background Operations - cont’d.
Moisture Reduction Heater (Divider Heater)
Theory of Operation - Moisture Reduction Heater (Divider
Heater)
The divider heater is connected between the power board
at P1-8 and the optical display board at P1-5. When the
refrigerator is first powered on the power board measures the
value of the DC input voltage and communicates this value to
the optical display board. Providing the value of the DC input
voltage is greater than 10.5VDC the optical display board will
request the power board to turn ON relay K5. Anytime relay K5
on the power board is turned ON, 12VDC passes through the
now closed K5 contacts to terminal P1-8 of the power board
and out to one side of the divider heater. The other side of the
divider heater is tied to 12 volt ground via the white/violet wire
connected between P1-4 of the optical display and P2-4 of
the power board. Anytime the optical display senses the door
is open, it requests the power board to turn off K5. Once the
door is closed the optical display will request the power board
to turn K5 back on. Anytime the DC input voltage falls below
10.5VDC the optical display will request the power board to
turn off K5.Anytime K5 is turned off due to low DC voltage it
will not be turned back on until the DC input voltage has gone
above 11.5VDC.
Backup Operating System (BOS) Mode
The refrigerator has the ability to continue cooling in the event
the thermistor (temperature sensor) becomes inoperable.
Should the thermistor become electrically open or shorted the
electronic controls will revert to this backup operating mode,
allowing the refrigerator to continue cooling until it can be
serviced.
Theory of Operation - Backup Operating System (BOS)
Mode
The power board measures the thermistor value and
communicates it to the optical display board. Should it
sense the thermistor is inoperable (electrically shorted/open,
unplugged, damaged, etc.) the optical display board will
activate the BOS mode. While operating in the BOS mode the
thermistor will be ignored and the temperature set point will be
interpreted as a duty cycle instead of a temperature setting.
This duty cycle will maintain refrigerator cooling by controlling
the length of time the heat source outputs (AC heater, LP
burner) are energized.
While operating in the BOS mode the unit will operate on an
80% duty cycle. The cycle period is 1 hour, translating to an
ON time of 42 minutes and an OFF time of 12 minutes.
Defrost Operation
Although the refrigerator is NOT frost free, it is designed to
limit frost build up on the fresh food fins (metal fins mounted
on the back wall of the fresh food compartment). This is done
by simply turning off the heat source output, which in turn,
momentarily suspends cooling. As the fin temperature rises,
the frost melts.
Theory of Operation - Defrost Operation
Every 49 hours of operation the refrigerator will enter a defrost
mode. While in the defrost mode the power board monitors the
thermistor value, reporting it to the optical display board. If the
thermistor value is greater than 38°F the optical display will
exit the defrost mode, reset the 49 hour timer, and continue
normal operation. If the thermistor value is less than 38°F the
optical display will request that the power board turn OFF the
applicable heat source output, be it the AC heater or the LP
gas burner, until the thermistor value reaches 38°F. Once the
38°F requirement is met the optical display will exit the defrost
mode, reset the 49 hour timer, and continue normal operation.
Theory of Operation - Auxiliary Output
Auxiliary Output
The auxiliary output is used to power auxiliary loads such as a
fan or waterline heater. The voltage at this output is whatever
the DC input voltage connected to power board terminals
12VDC and GND is. That is to say, if the DC input voltage to
the refrigerator is 11VDC then the auxiliary output voltage will
be 11VDC.
When the ON button of the optical display board is pressed,
relay K3 on the power board is turned ON; see On-Off Theory
of Operation (page 16) for detailed explanation. Anytime relay
K3 is ON, the DC input voltage connected at the refrigerator
(terminal 12VDC) passes through the now closed K3 contacts
to terminal P1-5 of the power board. The DC ground connection
(terminal GND) is electrically tied to power board terminal P1-3.
This auxiliary output will be present anytime the refrigerator is
ON.

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Refrigerator Service ManualN611v, N811v Models
FAULT CODES
The refrigerator is not cooling if the indicator light is either on solid red or flashes on red.
NOTE
Light Indicator Possible Cause Action to Take
Green, flashes off once every 20 sec-
onds The refrigerator is operating on AC electric power. The thermister sensed
inoperable, so temperature is being
controlled by backup operating system.
■Refer to "Thermister Fault" on page
15.
Amber, flashes off once every 20 sec-
onds. The refrigerator is operating on propane gas. The thermister sensed inoperable,
so temperature is being controlled by
backup operating system.
■Refer to "Thermister Fault" on page
15.
Red, on solid. 120VAC power not available. Refrigera-
tor defaulted to propane gas operation,
but did not establish a flame (gas lock-
out).
■Refer to "Solid Red Indicator Light"
on page 13.
Red, flashes on two (2) times every five
(5) seconds. This is a fault within the refrigerator controls. ■Refer to "Fault / Flash Pattern 2
Service Error" on page 14.
Red, flashes on three (3) times every
five (5) seconds. The temperature high limit switch is open. ■Refer to "Fault / Flash Pattern 3
Open High Limit" on page 14.
Red, flashes on four (4) times every five
(5) seconds. This is a problem with the AC heater circuit. ■Refer to "Fault / Flash Pattern 4
AC Relay Error" on page 14.
Red, flashes on five (5) times every five
(5) seconds. A flame is present at the burner when there should none. ■Refer to "Fault / Flash Pattern 5
Flame Should Not Be On" on page
14.
Red, flashes on eight (8) times every
five (5) seconds. The DC voltage to the refrigerator is too low to support cooling when operating
on propane gas.
■Refer to "Fault / Flash Pattern 8
LOW DC (1) Error" on page 15.
Red, flashes on nine (9) times every five
(5) seconds. The DC voltage to the refrigerator is too low. ■Refer to "Fault / Flash Pattern 9
LOW DC (2) Error" on page 15.

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Prior to performing the diagnostic steps called out in the
following pages; first verify these four important diagnostic pre-
checks. In most cases doing so, in and of itself, will remedy the
problem at hand.
1. The refrigerator is plugged into a known working AC
outlet with a voltage between 108VAC and 132VAC
2. Extension cords are not being used to supply AC power
to the refrigerator
3. The refrigerator is connected to a known working DC
power supply and/or battery supplying between 10.5
and 15.4VDC
4. LP gas is available to the refrigerator and is regulated
between 10.5 and 11.5”WC (Inches of Water Column)
Diagnostic Prechecks
The N611v, N811v model refrigerators have the ability to
recognize various fault conditions and will display a unique
error/fault code accordingly.
Should none of the heat source inputs be available, the power
ON indicator light will be ON continuously and will be red in
color.
Fault Codes - cont’d.
ALL other fault codes will be displayed using flash patterns.
The term “flash pattern” means the power ON indicator light is
turned ON and OFF to create a numeric pattern. These flash
patterns directly correspond to particular fault codes. That is to
say, for example, fault code 3 will be indicated by flashing the
power ON indicator light RED 3-times, followed by a 5-second
pause, and then repeated as long as the fault condition is
present. See Fig. 4 below.
NOR000123A
Fig. 4 - Flash Patterns
Fault Code Flash Patterns
■Because the AC voltage was sensed to be out of tolerance,
the refrigerator defaulted to LP gas mode. While inAuto LP
gas mode, either a flame was not established or a flame
was not sensed-a gas lockout condition now exists (solid
red light).
Verify:
■All LP gas shutoff valves (including manual shutoff
on gas valve itself) are open
■LP Gas pressure at refrigerator is 11.5” W.C. (water
column)
■LP gas supply line is free of air
■Burner is clean
■Electrode-to-burner air gap is between 1/8” and
3/16”
■Spark-sense igniter wire is installed correctly and in
good operating condition / continuity
■Gas valve solenoid is in good operating condition
(Coil resistance ≈74Ωto 92Ω)
■Wires to the gas valve are connected and in good
operating condition / continuity
■Power Board supplies 12VDC to gas valve when
required
Solid Red Indicator Light
NOR000127-0A
CODE 0
CONSTANT RED INDICATOR LIGHT
The following conditions will cause the power ON indicator to
be solid RED:
■The AC input voltage to the refrigerator was sensed to be
less than 85VAC.
Verify:
■The refrigerator is plugged into a known working
AC outlet supplying a minimum of 85VAC
■The AC power cord is in good operating condition
■The glass 8-amp fuse (F2) on the Power Board is
intact.

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14
Refrigerator Service ManualN611v, N811v Models
Fault Codes - cont’d.
Flash Pattern "2" - Power Board detected an internal fault.
■To reset fault power refrigerator OFF and back ON.
■If problem continues, replace Power Board.
Fault / Flash Pattern 2
Service Error
NOR000127-2A
CODE 2
Power ON indicator light flashes ON two times, OFF for 5-seconds, repeats
Fault / Flash Pattern 3
Open High Limit
Flash Pattern "3" - high limit thermal switch is open. The
thermal switch is mounted to the metal insulation pack above
the burner.
Verify:
• Is thermal switch electrically open, i.e. has it tripped?
• If no, verify wiring is connected properly. Refer to
"Wiring Pictorial" on page 29 for proper connection.
• Contact Customer Service.
NOR000127-3A
CODE 3
Power ON indicator light flashes ON three times, OFF for 5-seconds, repeats
Fault / Flash Pattern 4
AC Relay Error
Flash Pattern "4" - AC heater relay contacts of relay K2, on the
Power Board, are stuck closed.
• Replace Power Board
NOR000127-4A
CODE 4
Power ON indicator light flashes ON four times, OFF for 5-seconds, repeats
Flash Pattern "5" - gas valve is “mechanically” stuck open and
subsequently the Power Board has sensed a flame present
when there should not be.
• Replace the gas valve
Fault / Flash Pattern 5
Flame On, Should Not Be On
NOR000127-5A
CODE 5
Power ON indicator light flashes ON five times, OFF for 5-seconds, repeats

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Fault Codes - cont’d.
Flash Pattern "8" - refrigerator attempted to ignite or re-ignite
the burner when the DC input voltage was less than 10.0VDC.
Gas valve/igniter outputs are inhibited when attempting to cool
with DC voltage less than 10.0VDC.
If cooling begins when DC input voltage is greater than
10.0VDC and then falls below 10.0VDC, the gas valve will
remain energized and no fault will be displayed.
Verify:
• Battery charging equipment of the vehicle is operational
• AC/DC converter is operational (if applicable)
• Voltage is
>10.0VDC replace power board
Fault / Flash Pattern 8
LOW DC (1) Error
NOR000127-8A
CODE 8
Power ON indicator light flashes ON eight times, OFF for 5-seconds, repeats
Flash Pattern "9" - DC voltage to refrigerator is less than 8.5
volts DC. All outputs are inhibited. This fault automatically
resets; outputs are allowed to operate once DC input voltage
rises above 9.0VDC.
Verify:
• Battery charging equipment of the vehicle is operational
• AC/DC converter is operational (if applicable)
• Contact Customer Service for further instructions.
Fault / Flash Pattern 9
LOW DC (2) Error
NOR000127-9A
CODE 9
Power ON indicator light flashes ON nine times, OFF for 5-seconds, repeats
There is no displayed fault for an open door however; the
interior light will automatically be turned off in the event the
door has been sensed open for more than 2-minutes. The light
switch, a magnetically activated reed switch attached to the
optical display board, is activated by a magnet located beneath
the refrigerator doors top trim piece. When the magnet is
close to the reed switch (door closed) the light remains off;
when the magnet is away from the reed switch (door open) the
light is turned on. The open/closed status of the reed switch
is monitored by the optical display board and communicated
back to the power board which in turn activates the interior
light output accordingly. Because the switch operates via the
proximity of the magnet, it is important that the door alignment
is correct. To test for interior light operation, refer to "Interior
Light Test Procedure" on page 10.
Door Fault
If there is a problem sensed with the thermistor, the electronic
controls will ignore the thermistor and revert to a backup
operating system (BOS). Refer to "Backup Operating System
(BOS) Mode" on page 11. This error is displayed as follows:
• Auto AC Mode -
If there is a problem sensed with the thermistor
while operating in the Auto AC mode, the GREEN
power indicator light will flash OFF once every 20
seconds, repeating until thermistor is sensed
operable.
• Auto LP Gas Mode -
If there is a problem sensed with the thermistor hile
operating in the Auto LP Gas mode, the AMBER
power indicator light will flash OFF once every
20 seconds, repeating until thermistor is sensed
operable.
Verify:
• The lamp-thermistor wire assembly is plugged in
and that the connections are not dirty or broken
(see Fig. 5A on page 16).
• Thermistor resistance (see Fig. 5B on page 16).
NOR000127-10A
CODE Thermister
Thermister Fault

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Refrigerator Service ManualN611v, N811v Models
Fault Codes - cont’d.
Continuous 12-Volts:
See Fig. 6 on page 17.
12VDC is supplied to the refrigerator at Power Board terminals
12VDC & GND [A]. This 12VDC travels through the Power
Board to fuse F1 [B] and then out to P1-6 [C]. Via the green
wire, the 12VDC exits the Power Board and enters the Display
Board at P1-1 [D]. The 12VDC travels through the Display
Board to one side of the normally open On-Off switch [E]. This
12VDC is referred to as the continuous 12-volts because it
is always present at the one side of the On-Off switch when
12VDC power is applied to the refrigerator.
Blank Display
Switched 12-Volts:
See Fig. 7 on page 17.
Pressing the On-Off switch [E] will allow 12VDC to pass
through the On-Off switch and back to the Power Board via
the blue wire [F] connected between the Display Board at P1-3
and the Power Board at P2-3. Once the 12VDC reaches the
Power Board, a signal is sent out to the coil of relay K3 [G]
via the U1 microprocessor. This signal allows the K3 relay to
energize thus closing the normally open contacts [H].
Fig. 5A - Thermistor Fig. 5B - Thermistor in Ice
K3 is a latching relay. Once the relay coil is energized the contacts close and remain closed even when the 12VDC is re-
moved, hence the term “latching relay”. With the K3 contacts now closed, 12VDC is passed back to the Display Board via the
White-Red wire [J] between P1-9 of the Power Board and P1-2 of the Display Board. This 12VDC will remain at P1-2 until the
latching relay is “un-latched”, which will not take place until the On-Off button is depressed again. This 12VDC is termed the
switched 12-volts and is used to power ON the display.
NOTE
On-Off Theory of Operation:

www.norcold.com/cda 17 N611v, N811v ModelsRefrigerator Service Manual
NOR000072A
12VDC
GND
LIMIT_OUT
LIMIT_IN
AC_HT_HI_2
AC_HT_HI
AC_HT_LO
AC_HT_LO_2
L1
L2
41
2
35
6
125 3
4
67
8
9
10
12
K2
K5
K3
K1
K4
F2 8-Amp
F1 5-Amp
-
+
P3
-
-
-
+
+
+
+
+
P1
ON-OFF(Exaggerated view)
Vreg
1
2
3
4
5
P2
P1
+
U1
K2 K5 K4 K3
K1
YL-GN/JN-VE
GN/VE
BK/NR
WH-RD/BC-RG
WH-VT/BC-VT
GN/VE
WH/BC
POWER BOARD
DISPLAY BOARD
A
C
D
E
B
12VDC/VCD (BAT POS)
BU/BL
12VDC/VCD (BAT NEG)
Blank Display – Continuous 12-Volts Operation Overview
Fault Codes - cont’d
Fig. 6 - Continuous 12-Volt
NOR000072A
12VDC
GND
LIMIT_OUT
LIMIT_IN
AC_HT_HI_2
AC_HT_HI
AC_HT_LO
AC_HT_LO_2
L1
L2
41
2
35
6
125 3
4
67
8
9
10
12
K2
K5
K3
K1
K4
F2 8-Amp
F1 5-Amp
-
+
P3
-
-
-
+
+
+
+
+
1
2
3
4
5
P2
P1
+
U1
K2 K5 K4 K3
K1
YL-GN/JN-VE
GN/VE
BK/NR
WH-RD/BC-RG
WH-VT/BC-VT
GN/VE
WH/BC
POWER BOARD
F
J
K
H
12VDC/VCD (BAT POS)
BU/BL
12VDC/VCD (BAT NEG)
L
M
G
P1
ON-OFF (Exaggerated view)
Vreg
DISPLAY BOARD
E
NOR000073A
NOR000073A
Fig. 7 - Switch 12-Volt

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Refrigerator Service ManualN611v, N811v Models
LP GAS SYSTEM
Leak testing can be accomplished using an electronic leak
detector or a commercial grade leak test solution. The use
of home made soap and water leak test solution should be
avoided if possible. When applying leak test solutions, apply
the solution over the entire joint using a small brush or spray
applicator.
Due to low system operating pressure, it may take a few
minutes for bubbles to appear if the connection is leaking.
Hidden joints should be examined thoroughly using an
inspection mirror.
Fig. 8 - LP Gas System Components.
The refrigerator LP gas system, shown in Fig. 8, is for propane
gas use only. The system working pressure is 10.5 to 11.5
in. water column. Propane gas pressures below 10.5 in. w.c.
or above 11.5 in. w.c. will affect heat output which in turn will
affect cooling efficiency.
Testing for LP Gas LeaksPressure Requirements
Pressure
test port
DC connections
Orifice assembly
(LP15 orifice shown)
Electrode
Canister
Burner
Flue tube
Baffle
Burner tube
Burner box base
RV
LP gas supply
Gas valve
Gas inlet fitting
Gas outlet fitting
Manual shut-off
(shown closed)
!
WARNING:
When working on or near the LP gas system:
• Do not smoke or light fires! Extinguish all open flames!
• Do not use an open flame to leak test any of the LP gas
system components. LP gas is highly flammable and
explosive.
• Do not connect the refrigerator directly to the LP gas
tank. Always use an approved pressure regulator
between the LP gas tank and the refrigerator LP gas
system.
• To prevent damage to connections, piping, and
components, always use two wrenches to tighten or
loosen connections. Damaged connections, piping, and
components create the potential for gas leaks.
!
CAUTION:
Do not use leak test solutions that contain ammonia
orchlorine.Ammoniaandchlorine attackcopper and
brass components.
!
WARNING:
Do not wet or spray liquids on or near electrical
connectionsor electronic components.Many liquids,
including leak detection solutions, are electrically
conductive and can create an electric shock
hazard,short electricalcomponents, and/ordamage
electronic circuits.

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Components
When working on the refrigerator LP gas system:
• Do not alter or modify the burner tube anti-vibration
loop.
• Do not cross thread fittings. Exercise extreme care
when connecting and disconnecting propane gas
components.
• Leak test all of the refrigerator propane gas system
fittings after servicing, replacing, or repairing any LP gas
system component.
Solenoid Gas Valves
The manual shut-off valve and the pressure tap are integrated
into the solenoid gas valve. To manually shut-off gas to the
burner, rotate the knurled shut-off knob one-quarter turn (90
degrees) clockwise until the screw slot on the face of the knob
is vertical or perpendicular to the flow of gas. Refer to Fig. 9
below.
Solenoid Gas Valve Connections
The solenoid gas valve inlet fitting is 3/8 inch, male threads;
the outlet fitting is 1/4 inch, male threads.
Fig. 9 - Solenoid Gas Valve.
LP Gas System - cont’d
Orifice
The orifice controls the flow of propane gas to the burner.
When replacing the orifice always use the size orifice specified.
Using the wrong size or a damaged orifice will alter the amount
of propane flowing to the burner.
Refer to Fig. 10.
Burner
The burner, see Fig. 11, provides primary air access and
acts as the fuel mixing chamber to support ignition and the
combustion of propane gas. Primary combustion air flows into
the burner through three circular openings. Any obstruction
blocking any of the three openings will have an effect on the
fuel/air mixture. Insufficient combustion air will cause carbon
deposits to clog the burner slots. Carbon clogged burner
slots along with heavy dirt deposits in the burner are the main
cause of no cooling or poor cooling performance when the
refrigerator is operating in LP gas mode.
Burner Tube
The burner tube is 1/4 inch OD aluminum tubing with an anti-
vibration loop and a double flare at each end. See Fig. 12.
Fig. 11 - Burner
Fig. 10 - LP15 Orifice Assemblies
Cap type LP15 orifice assembly
LP
1
6
Fig. 12 - Burner Tube
Gas valve connection
Burner connection
!
WARNING:
Do not separate cap style LP15 orifice from its
adapter. Separating the assemblies breaks the seal
and causes an LP gas leak.

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20
Refrigerator Service ManualN611v, N811v Models
Flue
The flue on all N611v, N811v terminates a few inches above
the canister. See Fig. 13. The flue comes equipped with a
removable baffle ("spiral baffle") and a metal heat deflector.
The flue and its components should be checked annually. In
roof exhaust venting applications, the refrigerator must be
removed from the enclosure to check or service the flue or any
of its components.
In most sidewall exhaust venting applications, removal of the
side wall exhaust vent provides clear access to service the flue
or any of its components.
A one inch diameter, loop-handle, twisted wire brush with a 27
inch wire handle is recommended for sweeping clean the flue.
Heat Deflector
The heat deflector, deflects hot exhaust gases to the sides.
See Fig. 13. It also keeps dirt and debris from getting into the
flue. Cooling performance may be affected if the heat deflector
is not installed or is not installed correctly.
Spiral Baffle
The spiral baffle, traps and transfers heat to the cooling unit
generator. See Fig. 13.
A retaining wire suspends the spiral baffle in the flue just
above the flame. See Fig. 14. The spiral baffle should be
checked annually. To remove the spiral baffle from the flue:
1. Remove the heat deflector.
2. Unclip the baffle retaining wire from the rim of the flue.
3. Pull the baffle out of the flue tube.
Fig. 13 - Flue and Components
Heat deflector
Flue
Baffle retaining
wire
Baffle
Burner box
Fig. 14 - Flue Baffle
Fig. 15 - Flame Appearance
Light blue steady flame
with sharp blue cones
Retaining wire
Baffle
LP Gas System - cont’d.
!
CAUTION:
Do not cut or modify the spiral baffle retaining
wire! The wire positions the baffle for optimal heat
transfer.
Flame Appearance
The flame should be light blue with sharp blue root cones and
a steady burning flame plume. See Fig. 15.
A flame that is mostly orange or yellow, is erratic, and
unstable, indicates a "dirty" burner. Burner cleaning
procedures appear on page 32.
page 21.