KLT-40GS
SHORT HEIGHT GAS TILTING KETTLE
PARTS AND SERVICE MANUAL
EFFECTIVE APRIL 24, 2015
The Company reserves the right to make substitution in the event that items specied are not available.
ERRORS: Descriptive and/or typographic errors are subject to correction.
44 Lakeside Avenue, Burlington, Vermont 05401 USA Telephone: (802) 658-6600 Fax: (802) 860-3732
Superseding All Previous Parts Lists.
BLODGETT OVEN COMPANY
www.blodgett.com
P/N S00158 Rev A
TABLE OF CONTENTS
GENERAL .............................................................................3
MANIFOLD PRESSURE ................................................................3
THERMOSTAT .........................................................................3
PRESSURE SWITCH ..................................................................3
ADDING WATER (LOW WATER LIGHT COMES ON) .....................................4
RE-ESTABLISHING VACUUM ...........................................................4
TROUBLESHOOTING ..................................................................5
MATERIAL SAFETY DATA SHEET .......................................................7
APRIL 24, 2015 2 KLT-40GS
SERVICE INFORMATION
GENERAL
When any difculty arises always check that the unit has
been connected to the gas supply type and voltage for
which it was supplied. This can be done by examining
the serial plate on the lower right side of the unit. It will
list the gas type and voltage for which the unit was manu-
factured.
Wiring diagrams for the unit are located in a small enve-
lope afxed to the side panel of left hand console.
TOTAL INPUT
125,000 BTU/Hour DMS # 4 (.209") DMS # 20 (.161")
MANIFOLD PRESSURE
Natural Gas - 3.5 inches W.C
LP Gas - 4 inches W.C.
THERMOSTAT
The thermostat adjustment should not be changed.
Check the following before changing the thermostat.
1. With kettle cold, the pressure on the pressure gauge
should read in the green vacuum zone (25 to 30 inches Hg vacuum). If not, see ‘Re-establishing Vacuum”
section.
NATURAL PROPANE
ORIFICE SIZE
The major difculties caused by pressure switch mis-adjustment are:
1. Pressure relief valve opening, pressure rises above
45 psi.
2. Pressure in kettle is less than 30 psi and burner is
being shut down by pressure switch (not thermostat).
The pressure switch is preset for proper operation from
the factory. It is adjusted to the maximum pressure which
will prevent the pressure relief valve from opening. Dur-
ing preheat to the maximum thermostat setting (275°F),
from either a cold condition or a lower temperature setting, the temperature may overshoot the thermostat set-
ting and be shut down by the pressure switch. This is
normal, however, after the kettle has cycled several times
(empty) the thermostat will begin cycling the unit.
To Adjust Pressure Switch
1. To obtain access to the pressure switch, the front
panel must be removed. Remove the screws on bot-
tom of the panel. Be sure to support the panel to
avoid excessive strain on the wiring.
2. To increase the pressure switch setting, turn the white
ribbed knob clockwise; to decrease, turn it counterclockwise. Use the centre of the black ring as an in-
dicator.
2. The pressure switch may be set too high or too low
and causing the out of adjustment condition. A voltmeter should be used by a properly trained service-
man to determine if the pressure switch or thermostat
is actually cycling the burners. If the pressure switch
is found to be cycling the burners, see “Pressure
Switch” section.
After verifying that the pressure switch is set and oper-
ating properly, To set thermostat, adjust the trim-pot on
the control inside the kettle. It is located next to terminal
2 and is not sealed. Turning pot clockwise will lower the
temperature setting, counterclockwise increases temper-
ature. At maximum setting, the thermostat should cycle
off at a gauge pressure reading of 30 psi. Turn set screw
clockwise to decrease pressure and counterclockwise to
increase pressure.
PRESSURE SWITCH
The pressure switch should not be adjusted until it is determined to be the cause of an operating pressure dif-
culty. See “Thermostat” section to determine if the source
of difculty is the pressure switch or thermostat.
3. With the kettle empty and completely cold, turn kettle
on and set thermostat to maximum setting (275°F).
4. The pressure in kettle (read pressure gauge on front
panel) should reach a maximum of 30 psi and pressure relief valve should not open. Kettle pressure
may rise 3 or 4 psi even after burners shut down.
5. Relief valve should not open when kettle pressure is
45 psi; pressure switch setting is satisfactory.
6. If the safety relief valve opens, reduce setting on
pressure switch, cool kettle completely by running
cold water through it and repeat steps 3 - 6.
7. If pressure in kettle is below 30 psi increase setting
of pressure switch, cool kettle completely by running
cold water through it and repeat steps 3 - 7.
8. Allow the kettle to cycle several times to verify the
correct pressure setting.
9. Replace the front panel when adjustment is complete.
APRIL 24, 2015 3 KLT-40GS
SERVICE INFORMATION
ADDING WATER (LOW WATER LIGHT COMES ON)
It may be necessary to replenish water in the jacket when
the low water indicator comes on. Do so as follows:
1. Unit should be completely cold and off.
2. Lift handle of pressure relief valve to release vacuum
in kettle. (Relief valve is at right rear of kettle.
3. Remove air vent nut on the tee located next to the
relief valve.
4. Using pure distilled water only, pour the water into
the opening (a funnel will be helpful). Water will enter the kettle slowly, as air must escape through the
same hole. Water should be added until water level
at the sight glass is half way between the minimum
and maximum levels.
5. When sufcient water has been added, replace and
tighten the nut. Be sure to seal threads with a pipe
joint compound suitable for steam at 50 psi.
6. Vacuum must be re-established (See Re-establishing
Vacuum).
FOR REFERENCE:
The total amount of distilled water to be added when low
level pilot is illuminated is 372 . oz. (11 L)
RE-ESTABLISHING VACUUM
Periodically check pressure gauge when kettle is cold.
Reading should be in green vacuum zone (below 0 psi).
Otherwise air is present and proper heating will not occur. Use the following procedure to remove air and re-
establish vacuum:
With the kettle empty, turn the thermostat knob to the
highest temperature. When the temperature pilot light
goes off, open air vent nut one (1) full turn for 20 seconds
and then close and tighten the nut. This should remove
the air and any loss in performance should return.
Should the kettle fail to maintain a vacuum after repeated
attempts to establish vacuum, further checks should be
made to see if the pressure relief valve is leaking or if
there are any leaks in the pressure relief valve piping,
copper lines going to the pressure switch, pressure gauge
or thermostat tting.
CAUTION!!
Under normal operating conditions a “try lever
test” should be performed every two months.
Under severe service conditions, or if corrosion and/or deposits are noticed within the
valve body, testing must be performed more
often. A “try lever test” should also be performed at the end of any non-service period.
CAUTION!!
Hot, high pressure uid may be discharged
from body drain and vent during “try lever”
test. Care must be taken to avoid any bodily
contact.
CAUTION!!
High sound levels may be experienced during
“try lever” test. Wear proper safety equipment and exercise extreme care! Test at, or
near, half of the operating pressure by holding
the test lever fully open for at least two sec-
onds to ush the valve seat free of sediment
and debris. Then release lever and permit the
valve to snap shut.
If lift lever does not activate, or there is no
evidence of discharge, turn off equipment immediately and contact a licensed contractor or
qualied service personnel.
APRIL 24, 2015 4 KLT-40GS
TROUBLESHOOTING
PROBLEM SOLUTION
Motor will not run. • No current. Check that power is being supplied to the unit.
• Defective thermostat or pressure switch.
• Defective motor.
• Motor overload out.
• Blown fuse.
Motor runs, no spark. • Defective transformer.
• Defective ignition module.
• Blown fuse on ignition module.
• Defective spark electrode (cracked insulator).
• Defective ignition cable.
• Defective centrifugal switch on motor.
Motor runs, spark present, no gas ignition. • Manual main valve off.
• Mislocated spark or ground rods.
• Defective valve.
• Defective ignition module.
• Burner rate set too high. Ensure that manifold pressure is set per
rating plate and that correct orice size installed (See table page
21.
• Burner getting too much air. Reduce air shutter opening (not be-
low 1.0).
Low water light comes on. • Add water - See previous section
Relief valve opens. • Pressure switch set too high.
• Pressure gauge is not accurate.
• Relief valve is faulty
Flame burns only about 6 seconds and shuts
off.
Short ame. • Wrong size orice.
• Flame rod or ame ground mislocated.
• Defective ame rod wire.
• Defective ignition module.
• Burner rate set too high. Ensure that manifold pressure is set per
rating plate and that correct orice size installed.
• Burner getting too much air. Reduce air shutter opening (not be-
low 1.0).
• Low gas pressure.
• Air shutter adjustment.
• Main manual valve partially closed.
APRIL 24, 2015 5 KLT-40GS
TROUBLESHOOTING
PROBLEM SOLUTION
Long hazy ame. • Wrong size orice.
• High gas pressure.
• Dirty blower wheel or intake.
• Air shutter adjustments.
Gas fails to shut off. • Dirt on valve seat.
• Defective main valve.
NOTE: Loose, broken or grounded wiring may cause many of the symptoms listed. Check all wiring and make sure it is
intact.
APRIL 24, 2015 6 KLT-40GS
MATERIAL SAFETY DATA SHEET
PREPARATION INFORMATION:
Prepared for use in Canada by: E H & S Product Regulatory Management Department
DOW CHEMICAL CANADA INC.
P.O. Box 1012
Sarnia, Ontario, N7T 7K7
(800) 331-6451
CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
IN CASE OF EMERGENCY:
Fort Saskatchewan, Alberta: (780) 998-8282
Sarnia, Ontario: (519) 339-3711
Varennes, Quebec: (450) 652-1000
THE DOW CHEMICAL COMPANY
P.O. Box 1012
Sarnia, Ontario, N7T 7K7
Prepared for use in Canada by the E H & S Product Regulatory Management Department; Phone: (800) 331-6451.
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04 Date Printed: 08/04/04 ............................MSD: 002239
COMPOSITION/INFORMATION ON INGREDIENTS
Propylene Glycol CAS # 000057-55-6 94%
Dipotassium Phosphate CAS # 007758-11-4 <5%
Deionized Water CAS # 007732-18-5 <5%
APRIL 24, 2015 7 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Clear yellow liquid. Odourless. Avoid temperatures above 450°F, 232°C.
POTENTIAL HEALTH EFFECTS (See Section 11 for toxicological data.)
EYE: May cause slight transient (temporary) eye irritation. Corneal injury is unlikely. Mists may cause eye irritation.
SKIN CONTACT: Prolonged contact is essentially nonirritating to skin. A single prolonged exposure is not likely to result in
the material being absorbed through skin in harmful amounts. Repeated exposures may cause aking and softening of skin.
INGESTION: Single dose oral toxicity is considered to be extremely low. No hazards anticipated from swallowing small
amounts incidental to normal handling operations.
INHALATION: At room temperature, vapours are minimal due to physical properties. Mists may cause irritation of upper
respiratory tract (nose and throat).
SYSTEMIC (OTHER TARGET ORGAN) EFFECTS: Repeated excessive exposure to propylene glycol may cause central
nervous system effects.
CANCER INFORMATION: Did not cause cancer in laboratory animals.
TERATOLOGY (BIRTH DEFECTS): Birth defects are unlikely. Exposures having no adverse effects on the mother should
have no effect on the fetus.
REPRODUCTIVE EFFECTS: In animal studies, has been shown not to interfere with reproduction.
TM indicates a trademark of The Dow Chemical Company.
APRIL 24, 2015 8 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
FIRST AID
EYES: Flush eyes with plenty of water.
SKIN: Wash off in owing water or shower.
INGESTION: No adverse effects anticipated by this route of exposure incidental to proper industrial handling.
INHALATION: Remove to fresh air if effects occur. Consult a physician.
NOTE TO PHYSICIAN: No specic antidote. Supportive care. Treatment based on judgment of the physician in response
to reactions of the patient.
FIRE FIGHTING MEASURES
FLAMMABLE PROPERTIES
FLASH POINT: 214°F, 107°C (based on a similar material)
METHOD USED: PMCC
AUTOIGNITION TEMPERATURE: Not determined.
FLAMMABILITY LIMITS
LFL: Not determined.
UFL: Not determined
HAZARDOUS COMBUSTION PRODUCTS: During a re, smoke may contain the original material in addition to unidentied toxic and/or irritating compounds. Hazardous combustion products may include and are not limited to carbon monoxide
and carbon dioxide.
APRIL 24, 2015 9 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
OTHER FLAMMABILITY INFORMATION: Violent steam generation or eruption may occur upon application of direct water
stream to hot liquids. Flammable concentrations of vapour can accumulate at temperatures above 214°F. Liquid mist of this
product can burn. Spills of these organic liquids on hot brous insulations may lead to lowering of the autoignition temperatures possibly resulting in spontaneous combustion. Container may rupture from gas generation in a re situation.
EXTINGUISHING MEDIA: Water fog or ne spray, carbon dioxide, dry chemical, foam. Alcohol resistant foams (ATC type)
are preferred if available. General purpose synthetic foams (including AFFF) or protein foams may function, but much less
effectively. Do not use direct water stream. May spread re.
MEDIA TO BE AVOIDED: Do not use direct water stream.
FIRE FIGHTING INSTRUCTIONS: Keep people away. Isolate re area and deny unnecessary entry. Burning liquids may
be moved by ushing with water to protect personnel and minimize property damage. Burning liquids may be extinguished
by dilution with water. Do not use direct water stream. May spread re. Fight re from protected location or safe distance.
Consider use of unmanned hose holder or monitor nozzles. Use water spray to cool re exposed containers and re affected zone until re is out and danger of re-ignition has passed. Immediately withdraw all personnel from area in case of
rising sound from venting safety device or discolouration of the container. Move container from re area if this is possible
without hazard.
PROTECTIVE EQUIPMENT FOR FIRE FIGHTERS: Wear positive-pressure self-contained breathing apparatus (SCBA)
and protective re ghting clothing (includes re ghting helmet, coat, pants, boots and gloves). If protective equipment is
not available or not used, ght re from a protected location or safe distance.
APRIL 24, 2015 10 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
ACCIDENTAL RELEASE MEASURES (See Section 15 for Regulatory Information)
PROTECT PEOPLE: Use appropriate safety equipment. For additional information, refer to Section 8, Exposure Controls/
Personal Protection.
PROTECT THE ENVIRONMENT: Avoid contamination of all waterways. CLEAN-UP: See Section 13, Disposal Consideration.
HANDLING AND STORAGE
SPECIAL PRECAUTIONS TO BE TAKEN IN HANDLING AND STORAGE: No special handling requirements data available.
HANDLING: See Section 8, Exposure Controls/Personal Protection. STORAGE: See Section 10, Stability and Reactivity.
EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS: Provide general and/or local exhaust ventilation to control airborne levels below the exposure
guidelines.
PERSONAL PROTECTIVE EQUIPMENT
EYE/FACE PROTECTION: Use safety glasses. Safety glasses should be sufcient for most operations; however, for misty
operations wear chemical goggles.
SKIN PROTECTION: Use gloves impervious to this material.
RESPIRATORY PROTECTION: Atmospheric levels should be maintained below the exposure guideline. When respiratory
protection is required for certain operations, use an approved air-purifying respirator. In misty atmospheres, use an ap-
proved mist respirator.
EXPOSURE GUIDELINES: Propylene glycol: AIHA WEEL is 10 mg/m³ for total vapour and aerosol.
APRIL 24, 2015 11 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE/PHYSICAL STATE: ......................................... Clear yellow liquid.
ODOUR: ................................................................................................. Odourless
VAPOUR PRESSURE: ........................................................... 0.22 mmHg @ 20°C
VAPOUR DENSITY: .......................................................................................... 2.6
BOILING POINT: ............................................................................... 320°F, 160°C
SOLUBILITY IN WATER/MISCIBILITY: ................................................... Complete
SPECIFIC GRAVITY OR DENSITY: ............................................1.058 @ 25/25°C
STABILITY AND REACTIVITY
CHEMICAL STABILITY: Thermally stable at typical use temperatures.
CONDITIONS TO AVOID: Avoid use temperatures above 450°F, 232°C. Product can degrade at elevated temperatures.
Generation of gas during decomposition can cause pressure in closed systems.
INCOMPATIBILITY WITH OTHER MATERIALS: Avoid contact with oxidizing materials. Avoid contact with strong acids
HAZARDOUS DECOMPOSITION PRODUCTS: Hazardous decomposition products depend upon temperature, air supply
and the presence of other materials.
HAZARDOUS POLYMERIZATION: Will not occur.
TOXICOLOGICAL INFORMATION (See Section 3 for Potential Health Effects. For detailed toxicological data, write or call
the address or non-emergency number shown in Section 1).
SKIN: The LD50 for skin absorption in rabbits is >10,000 mg/kg.
APRIL 24, 2015 12 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
INGESTION: The oral LD50 for rats is 20,000 - 34,000 mg/kg.
MUTAGENICITY: In vitro mutagenicity studies were negative. Animal mutagenicity studies were negative.
ECOLOGICAL INFORMATION (For detailed Ecological data, write or call the address or non-emergency number shown
in Section 1.)
ENVIRONMENTAL FATE
MOVEMENT & PARTITIONING: Based largely or completely on data for major component(s). Bioconcentration potential is
low (BCF less than 100 or Log Pow less than 3). Potential for mobility in soil is very high (Koc between 0 and 50).
DEGRADATION AND PERSISTENCE: Based largely or completely on data for major component(s). Material is readily
biodegradable. Passes OECD test(s) for ready biodegradability. Degradation is expected in the atmospheric environment
within minutes to hours.
ECOTOXICITY: Based largely or completely on data for major component(s). Material is practically non-toxic to aquatic
organisms on an acute basis (LC50/EC50 >100 mg/L in most sensitive species).
DISPOSAL CONSIDERATIONS (See Section 15 for Regulatory Information)
DISPOSAL: DO NOT DUMP INTO ANY SEWERS, ON THE GROUND OR INTO ANY BODY OF WATER. All disposal
methods must be in compliance with all Federal, State/Provincial and local laws and regulations. Regulations may vary in
different locations. Waste characterizations and compliance with applicable laws are the responsibility solely of the waste
generator. THE DOW CHEMICAL COMPANY HAS NO CONTROL OVER THE MANAGEMENT PRACTICES OR MANUFACTURING PROCESSES OF PARTIES HANDLING OR USING THIS MATERIAL. THE INFORMATION PRESENTED
HERE PERTAINS ONLY TO THE PRODUCT AS SHIPPED IN ITS INTENDED CONDITION AS DESCRIBED IN MSDS
SECTION 2 (Composition/Information On Ingredients).
APRIL 24, 2015 13 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
FOR UNUSED & UNCONTAMINATED PRODUCT, the preferred options include sending to a licensed, permitted: recycler,
reclaimer, incinerator or other thermal destruction device.
As a service to its customers, Dow can provide names of information resources to help identify waste management companies and other facilities which recycle, reprocess or manage chemicals or plastics, and that manage used drums. Telephone
Dow’s Customer Information Center at 800-258-2436 or 989-832-1556 for further details.
TRANSPORT INFORMATION
DEPARTMENT OF TRANSPORTATION (D.O.T.): For D.O.T. regulatory information, if required, consult transportation regulations, product shipping papers, or contact your Dow representative.
CANADIAN TDG INFORMATION: For TDG regulatory information, if required, consult transportation regulations, product
shipping papers, or your Dow representative.
REGULATORY INFORMATION (Not meant to be all-inclusive – selected regulations represented).
NOTICE: The information herein is presented in good faith and believed to be accurate as of the effective date shown
above. However, no warranty, express or implied is given. Regulatory requirements are subject to change and may differ
from one location to another; it is the buyer’s responsibility to ensure that its activities comply with federal, state or provincial, and local laws. The following specic information is made for the purpose of complying with numerous federal, state or
provincial, and local laws and regulations. See other sections for health and safety information.
APRIL 24, 2015 14 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
U.S. REGULATIONS
SARA 313 INFORMATION: To the best of our knowledge, this product contains no chemical subject to SARA Title III Section
313 supplier notication requirements.
SARA HAZARD CATEGORY: This product has been reviewed according to the EPA “Hazard Categories” promulgated un-
der Sections 311 and 312 of the Superfund Amendment and Reauthorization Act of 1986 (SARA Title III) and is considered,
under applicable denitions, to meet the following categories:
Not to have met any hazard category.
TOXIC SUBSTANCES CONTROL ACT (TSCA):
All ingredients are on the TSCA inventory or are not required to be listed on the TSCA inventory.
STATE RIGHT-TO-KNOW: The following product components are cited on certain state lists as mentioned. Non-listed components may be shown in the composition section of the MSDS.
CHEMICAL NAME CAS NUMBER LIST
1, 2-Propanediol 000057-55-6 PA1
PA1= Pennsylvania Hazardous Substance (present at greater than or equal to 1.0%). OSHA HAZARD COMMUNICATION
STANDARD:
This product is not a “Hazardous Chemical” as dened by the OSHA Hazard Communication Standard, 29 CFR 1910.1200.
APRIL 24, 2015 15 KLT-40GS
MATERIAL SAFETY DATA SHEET
Product: DOWFROSTTM HD HEAT TRANSFER FLUID, DYED
Product Code: 04632
Effective Date: 08/03/04, Date Printed: 08/04/04, MSD: 002239
CANADIAN REGULATIONS
WHMIS INFORMATION: The Canadian Workplace Hazardous Materials Information System (WHMIS) Classication for
this product is:
This product is not a “Controlled Product” under WHMIS. CANADIAN ENVIRONMENTAL PROTECTION ACT (CEPA)
CANADIAN ENVIRONMENTAL PROTECTION ACT (CEPA)
This product contains one or more substances which are not listed on the Canadian Domestic Substances List (DSL). Contact your Dow representative for more information.
OTHER INFORMATION
MSDS STATUS: Revised Section 8 (Exposure Guidelines).
The information herein is given in good faith, but no warranty, express or implied, is made. Consult The Dow Chemical
Company for further information.
APRIL 24, 2015 16 KLT-40GS
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