Groen DH-DHT-40 Service Manual

OPERATOR MANUAL

IMPORTANT INFORMATION, KEEP FOR OPERATOR

This manual provides information for:

MODELS DH/DHT Domestic STEAM JACKETED KETTLE WITH STANDARD ELECTRONIC IGNITION

·Self-Contained

·Gas Heated

·Floor Mounted

·Tilting

THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE. READ, UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND WARNINGS CONTAINED IN THIS MANUAL.

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

POST IN A PROMINENT LOCATION

Instructions to be followed in the event user smells gas. This information shall be obtained by consulting your local gas supplier. As a minimum, turn off the gas and call your gas company and your authorized service agent. Evacuate all personnel from the area.

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Readtheinstallation,operatingandmaintenanceinstructions thoroughly before installing or servicing this equipment.

NOTIFY CARRIER OF DAMAGE AT ONCE

It is the responsibility of the consignee to inspect the container upon receipt of same and to determine the possibility of any damage, including concealed damage. Unified Brands suggests that if you are suspicious of damage to make a notation on the delivery receipt. It will be the responsibility of the consignee to file a claim with the carrier. We recommend that you do so at once.

Manufacture Service/Questions 888-994-7636.

Information contained in this document is known to be current and accurate at the time of printing/creation. Unified Brands recommends referencing our product line websites, unifiedbrands.net, for the most updated product information and specifications.

PART NUMBER 121050, REV. D (2/06)

1055 Mendell Davis Drive

Jackson, MS 39272 888-994-7636, fax [phone] groen.com

	IMPORTANT — READ FIRST — IMPORTANT
CAUTION:	BE SURE ALL OPERATORS READ, UNDERSTAND AND FOLLOW THE OPERATING
	INSTRUCTIONS, CAUTIONS, AND SAFETY INSTRUCTIONS CONTAINED IN THIS
	MANUAL.
WARNING:	THIS UNIT IS INTENDED FOR USE IN THE COMMERCIAL HEATING, COOKING AND
	HOLDING OF WATER AND FOOD PRODUCTS, PER THE INSTRUCTIONS
	CONTAINED IN THIS MANUAL. ANY OTHER USE COULD RESULT IN SERIOUS
	PERSONAL INJURY OR DAMAGE TO THE EQUIPMENT AND WILL VOID
	WARRANTY.
WARNING:	KETTLE MUST BE INSTALLED BY PERSONNEL QUALIFIED TO WORK WITH
	ELECTRICITY AND PLUMBING. IMPROPER INSTALLATION CAN RESULT IN
	INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT.
DANGER:	ELECTRICALLY GROUND THE UNIT AT THE TERMINAL PROVIDED. FAILURE TO
	GROUND UNIT COULD RESULT IN ELECTROCUTION AND DEATH.
WARNING:	DO NOT CONNECT ANY PIPING TO THE POP SAFETY VALVE. THE VALVE MUST
	BE FREE TO VENT STEAM AS NEEDED. THE ELBOW ATTACHED TO THE SAFETY
	VALVE SHOULD POINT TO THE FLOOR. IMPROPER INSTALLATION WILL VOID
	WARRANTY.
WARNING:	AVOID ALL DIRECT CONTACT WITH HOT EQUIPMENT SURFACES. DIRECT SKIN
	CONTACT COULD RESULT IN SEVERE BURNS.
WARNING:	AVOID ALL DIRECT CONTACT WITH HOT FOOD OR WATER IN THE KETTLE.
	DIRECT CONTACT COULD RESULT IN SEVERE BURNS.
CAUTION:	DO NOT OVER FILL THE KETTLE WHEN COOKING, HOLDING OR CLEANING. KEEP
	LIQUIDS A MINIMUM OF 2-3” (5-8 cm) BELOW THE KETTLE BODY RIM TO ALLOW
	CLEARANCE FOR STIRRING, BOILING AND SAFE PRODUCT TRANSFER.
WARNING:	TAKE SPECIAL CARE TO AVOID CONTACT WITH HOT KETTLE BODY OR HOT
	PRODUCT WHEN ADDING INGREDIENTS, STIRRING OR TRANSFERRING
	PRODUCT TO ANOTHER CONTAINER.
WARNING:	WHEN TILTING KETTLE FOR PRODUCT TRANSFER:
	1) USE CONTAINER DEEP ENOUGH TO CONTAIN AND MINIMIZE SPLASHING.
	2) PLACE CONTAINER ON STABLE, FLAT SURFACE, AS CLOSE TO KETTLE AS
	POSSIBLE.
	3) DO NOT OVER FILL CONTAINER. AVOID DIRECT SKIN CONTACT WITH HOT
	CONTAINER AND ITS CONTENTS.
CAUTION:	KEEP FLOORS IN FRONT OF KETTLE WORK AREA CLEAN AND DRY. IF SPILLS
	OCCUR, CLEAN IMMEDIATELY, TO AVOID SLIPS OR FALLS.
WARNING:	FAILURE TO CHECK SAFETY VALVE OPERATION PERIODICALLY COULD RESULT
	IN PERSONAL INJURY AND/OR DAMAGE TO EQUIPMENT.
WARNING:	WHEN TESTING SAFETY VALVE, AVOID ANY EXPOSURE TO THE STEAM
	BLOWING OUT OF THE SAFETY VALVE. DIRECT CONTACT WITH STEAM COULD
	RESULT IN SEVERE BURNS.
WARNING:	TO AVOID INJURY, READ AND FOLLOW ALL PRECAUTIONS STATED ON THE
	LABEL OF THE WATER TREATMENT COMPOUND.

GROEN.COM

WARNING:	BEFORE REPLACING ANY PARTS, DISCONNECT THE UNIT FROM THE ELECTRIC
	POWER SUPPLY AND CLOSE THE MAIN GAS VALVE. ALLOW FIVE MINUTES FOR
	UNBURNED GAS TO VENT.
WARNING:	KEEP WATER AND SOLUTIONS OUT OF CONTROLS AND ELECTRICAL
	EQUIPMENT. NEVER SPRAY OR HOSE THE SUPPORT HOUSING OR ELECTRICAL
	CONNECTIONS.
CAUTION:	MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS MEMBRANES AND
	CLOTHING. PRECAUTIONS SHOULD BE TAKEN. WEAR RUBBER GLOVES, GOGGLES
	OR FACE SHIELD AND PROTECTIVE CLOTHING. CAREFULLY READ THE WARNINGS
	AND FOLLOW THE DIRECTIONS ON THE LABEL OF THE CLEANER TO BE USED.
CAUTION:	USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY GROEN OR
	THEIR AUTHORIZED SERVICE AGENTS CAN CAUSE OPERATOR INJURY AND
	DAMAGE TO THE EQUIPMENT, AND WILL VOID ALL WARRANTIES.

IMPORTANT: SERVICE PERFORMED BY OTHER THAN FACTORY AUTHORIZED PERSONNEL WILL VOID WARRANTIES.

OM-DH/DHT

Table of Contents

IMPORTANT OPERATOR WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 EQUIPMENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 INSPECTION & UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 DIAGRAMS & SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 PARTS LISTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 MAINTENANCE LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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Equipment Description

The Groen DH is a floor-mounted, tilting, steam jacketed kettle with a thermostatically controlled, self-contained, gas-heated steam source and appropriate controls, mounted on a sturdy base. The Model DH is available in 20, 40, 60 or 80 gallon capacities.

The body of the DH Kettle is constructed of stainless steel, welded into one solid piece. The kettle is furnished with a reinforced rim and a butterfly shaped pouring lip. It has a steam jacket which is ASME shop inspected and registered with the national board for working pressures up to 50 PSI. Kettle finish is 180 emery grit on the inside and bright high buff polish on the outside.

The kettle is tilted with a hand crank to pour out its contents. Stainless steel panels enclose the controls and the base. Four stainless steel tubular legs support the unit. Bullet or flanged

feet on each of the legs can be adjusted to level the

kettle. Standard DHT units include a two inch tangent draw-off valve.

The self-contained steam source is heated by propane or natural gas. Ignition is electronic.

The kettle is charged at the factory with chemically pure water which contains rust inhibitors. The steam source provides kettle temperatures of 150º to approximately 295ºF (65 to 150ºC). Unit controls include a thermostat, pressure gauge, safety valve, pressure limit control, low water cut-off, power switch and gas regulator valve. The gas supply shuts off automatically when the kettle is tilted.

The unit must be specified for use with natural or propane gas. Service connections for gas and electricity are required. Standard power supply is 115 Volt. Alternate voltages (208V or 240V) are available.

		KETTLE CHARACTERISTICS
		DH/DHT-20	DH/DHT-40	DH/DHT-60	DH/DHT-80
Kettle Capacity		20 gal	40 gal.	60 gal.		80 gal.
		(75 ltr)	(150 ltr)	(225 ltr)		(302 ltr)
Kettle Body		20 in.	26 in.	30 in.		34 in.
Diameter		(508 mm)	(660 mcm)	(762 mm)	(863 mm)
Base Width		35 in.	47 in.	47 in.		52 in.
		(889 mm)	(1194 mm)	(1194 mm)	(1320 mm)
Base Front to		29	29	29		37.5
Back		(736 mm)	(736 mm)	(736 mm)	(952 mm)
Firing Rate - per		72,000 BTU	100,000 BTU	150,000 BTU	150,000 BTU
hour
Energy into		44,140 BTU	65,000 BTU	93,000 BTU	93,000 BTU
Product per hr.
Options available with listed models are:
1. Two inch tangent drawoff standard on DHT models					5.	Basket Inserts (Tri-BC)
2.	Strainers, solid disk, ¼ or c inch holes				6.	Water fill faucets with swing spout
3.	No. 31 lift-off cover				7.	Kettle Brush Kit

4. No. 51 counterbalanced cover w/actuator*

OM-DH/DHT

Inspection & Unpacking

The unit will arrive in a heavy shipping carton and will be bolted or banded to a skid. Immediately upon receipt, inspect the carton carefully for exterior damage.

CAUTION

SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT. TAKE CARE TO AVOID PERSONAL INJURY OR DAMAGE TO THE UNIT BY STAPLES LEFT IN THE WALLS OF THE CARTON.

Carefully cut any polyester straps around the carton and detach the sides of the box from the skid. Pull the carton up off the unit.

Thoroughly inspect the unit for hidden damage. Report any shipping damage or incorrect shipments to the delivery agent.

Write down the model number, serial number, and installation date, and retain this information for future reference. Space for these entries is provided at the top of the Service Log at the back of this manual. Keep this manual on file and available for operators to use.

CAUTION

THIS UNIT WEIGHS BETWEEN 535 AND 978 POUNDS (245 TO 400 Kg) DEPENDING ON SIZE. INSTALLER SHOULD USE PROPER EQUIPMENT TO LIFT SAFELY.

When installation is to begin, carefully cut any straps which hold the unit on the skid. Lift the unit straight up off the skid. Examine packing materials to be sure loose parts are not discarded with the materials.

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Installation

For efficient performance the DH kettle must be installed in a well-ventilated area. Items which might restrict or obstruct the flow of air for combustion and ventilation must be removed. The area directly around the appliance must be free of combustible materials.

WARNING

THE KETTLE MUST BE INSTALLED BY PERSONNEL QUALIFIED TO WORK WITH ELECTRICITY AND PLUMBING. IMPROPER INSTALLATION CAN RESULT IN INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT.

1.Installation on combustible floors is allowed. Rear clearance of 10 inches and six inches at both sides is required for both combustible and non-combustible construction.

2.Installation under a vent hood is recommended. Consult local codes.

3.Set the kettle in place and level it using a spirit level on the bar rim, by turning the bullet or flange feet to adjust leg length. Allow clearance around the unit for cleaning, maintenance and service.

4.Complete the piping to the gas service main with ½” line or approved equivalent.

5.For standard units, provide 115 vac, 60 Hz, single phase 5 AMP electrical service. The unit may also be ordered for alternate electric service of 208 VAC or 240 VAC. Observe local codes and/or The National Electrical Code in accordance with ANSI/NFPA 70 - (current edition). Use the wiring diagram inside the service panel and at the rear of this manual.

6.Bring electrical service through the entrance at the rear of the support housing with a ½ inch conduit connector. Make a watertight connection with the incoming lines.

DANGER

ELECTRICALLY GROUND THE UNIT AT THE TERMINAL PROVIDED. FAILURE TO GROUND UNIT COULD RESULT IN ELECTROCUTION AND DEATH.

7.Electrically ground the unit at the terminal provided.

8.After the kettle has been connected to the gas supply, check all gas joints for leaks. DO NOT USE FLAME TO CHECK FOR LEAKS. A thick

soap solution or other suitable leak detector should be employed.

9.Confirm that the jacket water level is between the gauge glass markers or inside the sight glass port. If the level is low, follow instructions under “Jacket Filling and Water Treatment,” Page 13.

10.The open end of the elbow on the outlet of the safety valve must face downward. If it does not, turn it to the correct position.

The open end of the pop safety valve elbow must face downward.

WARNING

DO NOT CONNECT ANY PIPING TO THE POP SAFETY VALVE. THE VALVE MUST BE FREE TO VENT STEAM AS NEEDED. IMPROPER INSTALLATION WILL VOID THE WARRANTY!

THE ELBOW ATTACHED TO THE SAFETY VALVE MUST POINT TO THE FLOOR.

11.The appliance and its individual shut-off valve must be disconnected from the gas supply piping system during any testing at pressures in excess of ½ PSI (3.45 kPa). The appliance must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing at or less than ½ PSI (3.45 kPa).

OM-DH/DHT

(For units with optional tangent draw-off). Assemble the tangent draw-off by placing the large nut over the draw-off valve and inserting it into the draw-off tube.

ONLY HAND-TIGHTEN THE NUT to complete installation.

Now that the kettle has been installed, you should test to ensure that it is operating correctly.

1.Remove literature and packing materials from inside and outside of the unit.

2.If the unit is equipped with a draw-off valve (product outlet), clean out any material which might clog or damage the draw-off.

3.Confirm that the tilting mechanism is operating properly by tilting the kettle through its full range. Then return the kettle to the upright position.

4.Turn on the electrical service to the unit.

5.Pour 1-2 quarts of water into the kettle.

6.Following “To Start Kettle” instructions in the “Operation” section (Page 9), begin heating the water at the highest thermostat setting. The heat indicator light should come on, and heating should continue until the water boils.

If the unit functions as described it is ready for use. If it does not function as described, contact your local Groen Authorized Service Agency.

When attaching the draw-off valve handtighten the nut.

PROPER

WATER

LEVEL

	8	Each day confirm the jacket water
		level by checking the water gauge.

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Operation

A. Controls

Operator controls for the DH kettle are:

1.Manual gas valve (on gas line behind the unit), which controls the supply of gas from the main to the unit.

2.On-Off (Toggle) Switch. This controls the supply of electric power to the control circuits.

3.Thermostat dial, which turns the thermostat on or off, and sets the kettle temperature.

4.Tilting crank, used to tilt the kettle body.

5.Indicator Lights to alert operator of unit conditions:

a.Power On Indicator - shows that the unit is turned on

b.Heat Indicator - indicates that main gas is on to produce steam in the kettle jacket.

c.Low Water indicator - shows that jacket water is low

6.Unit gas pressure regulator adjustment - located behind the access door in the kettle skirt.

B. Operating Procedure

1.To Start Kettle:

a.EVERY DAY make sure that the jacket water level is between the markers on the gauge glass or inside the sight glass port. If the level is too low, see “Jacket Filling and Water Treatment” on page 13.

b.Check the pressure gauge. If the gauge does not show 20 to 30 inches of mercury (Hg) vacuum (that is a reading of 20 to 30 below 0 atmospheric pressure), see “Jacket Vacuum” on page 13.

c.Do not attempt to light any burner with a flame.Turn the manual gas valve ON (align handle with gas line).

1)Turn toggle (on-off) switch ON. The electronic ignition will attempt to light the pilot for 90 seconds, or until it is lit. Once lit, proceed to step two.

2)Turn thermostat to desired setting. The main gas burner will ignite, and will cycle to maintain the set temperature. The heat indicator light will come on.

3)If the unit does not light, turn it off and wait five minutes. Then follow the instructions again.

2To Empty Kettle:

a.To tilt the body of the kettle forward, turn the hand crank on the front of the cabinet counter-clockwise. The body will stay in the position it holds when you stop cranking. To return the kettle body to its upright position, turn the crank clockwise.

b.Product may also be transferred by means of the optional draw-off valve, if the kettle is so equipped.

3.To Shut Down Kettle:

a.Turn thermostat dial to OFF.

b.Turn toggle switch to OFF.

4.For a prolonged shut-down:

a.Follow the procedure above.

b.Turn the manual gas valve off (handle at right angles to gas line).

c.Disconnect electric power from the unit.

OM-DH/DHT

WARNING

WHEN TILTING KETTLE:

1) WEAR PROTECTIVE OVEN MITT AND

PROTECTIVE APRON.

2) USE DEEP CONTAINER TO CONTAIN AND MINIMIZE PRODUCT SPLASHING.

3) PLACE CONTAINER ON STABLE, FLAT SURFACE, AS CLOSE TO KETTLE AS POSSIBLE.

4) STAND TO RIGHT OF KETTLE WHILE POURING — NOT DIRECTLY IN POUR PATH OF HOT CONTENTS.

5) POUR SLOWLY, M A I N T A I N I N G CONTROL OF KETTLE, AND RETURN KETTLE BODY TO UPRIGHT POSITION AFTER CONTAINER IS FILLED OR TRANSFER IS COMPLETE.

6) DO NOT OVERFILL CONTAINER. AVOID SKIN CONTACT WITH HOT CONTAINER AND ITS CONTENTS.

5. If power fails:

a. Do not attempt to operate the unit until electric power is restored.

b. When power comes back on, follow directions “To Start Kettle,” above.

C. Use of Common Accessories

1.Lift-Off or Counterbalanced Cover

As with stock pot cooking, an optional cover can speed up the heating of water and food products. It helps retain heat and reduces the heat and humidity in the kitchen. A cover can reduce some product cook times and help maintain the temperature, color and texture of products held or simmered for longer periods.

Be sure the handle is secure on the lift-off cover before using. ALWAYS use the handle to place or remove cover from the kettle. Wear protective oven mitts and apron

When putting a lift-off cover on the kettle, position it on top of kettle rim, with its flat edge facing the pouring lip.

WARNING

AVOID ALL DIRECT CONTACT WITH HOT SURFACES AND HOT FOOD OR WATER IN THE KETTLE. DIRECT CONTACT COULD RESULT IN SEVERE BURNS.

When removing a lift-off cover:

a.Firmly grasp the handle, and lift the rear edge (farthest from operator) 1-2” (3-5 cm) to allow steam and water vapor to escape. Wait 2-3 seconds.

b.Tilt cover to 45-60° angle to allow any hot

condensate or product to roll off cover back into kettle.

c.Remove cover, ensuring that remaining hot condensate or product does not drip on operator, floor or work surfaces.

d.Place cover on safe, flat, sanitary, out-of-the- way surface, or return to kettle.

CAUTION

DO NOT TILT KETTLE WITH LIFT-OFF COVER IN PLACE. COVER MAY SLIDE OFF, CAUSING INJURY TO OPERATOR.

2.Basket Insert

An optional kettle basket insert set (Tri-BC) will assist in cooking water-boiled products including eggs, potatoes, vegetables, shell fish, pasta and rice. The nylon mesh liner must be used for products smaller than the basket mesh size, (approx. ¼” (6 mm). This includes rice and small pasta shapes.

a.Allow for displacement of the three baskets and product. This may mean only half filling the kettle. Test baskets and product displacement with the kettle OFF, and with cold water in the kettle.

CAUTION

DO NOT OVERFILL THE KETTLE WHEN COOKING, HOLDING OR CLEANING. KEEP LIQUIDS AT LEAST 2-3” (5-8 cm) BELOW THE KETTLE RIM TO ALLOW CLEARANCE FOR STIRRING, BOILING AND SAFE PRODUCT TRANSFER.

10 GROEN.COM

WARNING

AVOID ALL DIRECT CONTACT WITH HOT FOOD OR WATER IN THE KETTLE. DIRECT CONTACT COULD RESULT IN SEVERE BURNS.

b.Load baskets on a level, stable work surface.

c.Lift loaded baskets with both hands. Get help from another person if the basket is too heavy for safe handling.

d.Slowly lower product into kettle and securely hook basket to the “Y” frame.

e.When removing baskets with cooked product, lift straight up, ensuring basket bottoms clear the kettle rim and pouring lip. Wear protective oven mitts and protective apron.

f.Allow hot water to fully drain from product, before moving basket away from the kettle. Do not rest baskets on kettle rim or pouring lip. If baskets are too heavy for individual to lift and safely move, get help. Remove product immediately from basket into

another container, being sure to avoid contact with hot product and hot basket or...

g.Place baskets with food on a stable, flat surface, inside a solid steamer or bake pan, to catch any remaining hot water draining from product.

Sequence of Operation

The following “action-reaction” outline is provided to help understand how the DH kettle works.

1.When the power switch is turned on, it starts the spark igniter and opens the automatic valve for the pilot burner. The spark ignites a pilot flame, which heats the sensor. The sensor then sends a signal to turn off the spark. The flame thereafter acts as a standing pilot until the power is turned off.

2.If the pilot flame is not sensed within 90 seconds after spark begins, a timer shuts down the entire operation. To attempt a second trial for ignition, turn off the power switch. Check the gas supply valves and wait five minutes before trying again by switching power on. If you cannot establish a pilot flame in four tries, close all valves, turn off the power, and contact an authorized Groen Service Agency.

3.When the operator sets a temperature on the thermostat, it causes the automatic valve to

admit gas to the main burner, where it is ignited by the pilot flame. When the kettle reaches the set temperature, the thermostat switch opens.

This stops the signal to the gas control valve and shuts off gas to the main burner. The pilot flame remains lit. When the kettle cools below the set temperature, the thermostat switch closes and starts another cycle. On and off cycling continues and maintains the kettle at the desired temperature. This action is indicated by the Heat indicator light.

The kettle has the following safety features in addition to the 90-second ignition timer:

1.Low water cutoff relay that will shut off gas supplies to all burners until the jacket water level is corrected.

2.High limit pressure switch, set to open at about 46 PSI and to shut down the burners until jacket pressure is decreased.

3.Pop safety valve, which will release steam if jacket pressure exceeds 50 PSI.

4.Tilt switch, which shuts off all burners when the kettle is tilted.

5.Gas pressure regulator built into the gas control valve.

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