Southbend Range EC-2S Service Manual

COMPARTMENT STEAMER

$4.00

ELECTRIC BOILER

(Manual Section CS)

OWNER’S MANUAL

INSTALLATION
USER'S GUIDE

SERVICE

PARTS

COMPARTMENT STEAMER

ELECTRIC BOILER

MODELS: EC-2S; EC-3S; EDA-2S; EHD-2S

These instructions should be read thoroughly before attempting installation.
Set up, installation and Performance Check should be performed by a
qualified service technician. The Manufacturer, Southbend (1100 Old
Honeycutt Rd., Fuquay-Varina, North Carolina 27526), informs you that
unless the installation instructions for the above described Southbend product
are followed and performed by a qualified service technician, (a person
experienced in and knowledgeable concerning the installation of commercial
gas and/or electrical cooking equipment) then the terms and conditions of the
Manufacturer's Limited Warranty will be rendered void and no warranty of any
kind shall apply.

If the equipment has been changed, altered, modified or repaired by other
than a qualified service technician during or after the 12-month limited
warranty period, then the manufacturer shall not be liable for any incidental or
consequential damages to any person or to any property which may result
from the use of the equipment thereafter. Some States do not allow the
exclusion or 'imitation of incidental or consequential damages, so the above
limitation or exclusion thereto may not apply to you.

In the event you have any question concerning the installation, use, care, or
service of the product, write Customer Service Department, Southbend
Corporation, 1100 Old Honeycutt Rd., Fuquay-Varina, North Carolina 27526.

A MIDDLEBY COMPANY

Congratulations! You have just purchased one of the finest pieces of heavy-duty, commercial cooking equipment on

Warranty

............................... . ............... ..……………….......

1

Dimensions

..................................................…………............

2

SECTION SIX

— SERVICE

A MIDDLEBY COMPANY

the market today.
You will find that your new equipment, like all Southbend equipment, has been designed and manufactured to some of

the toughest standards in the industry - those of Southbend Corporation. Each piece of Southbend equipment has
been carefully engineered and designs have been verified through laboratory tests and field installations in some of the
more strenuous commercial cooking applications. With proper care and field maintenance, you will experience years of
reliable, trouble-free operation from your Southbend equipment. To get the best results, it's important that you read this
manual carefully.

TABLE OF CONTENTS:

SECTION ONE — INSTALLATION

SECTION TWO — STEAM FUNCTION

SECTION THREE — COOKING CHART

SECTION FOUR — MAINTENANCE

SECTION FIVE — OPERATION

SECTION SEVEN — PARTS

SECTION EIGHT — WIRING

CAUTION: WATER QUALITY IS THE MAJOR FACTOR AFFECTING THE PERFORMANCE OF YOUR

APPLIANCE. INCOMING WATER HARDNESS SHOULD NOT EXCEED 2.0 PPM GRAINS AND
THE pH SHOULD NOT EXCEED 7.5. IF YOU ARE UNSURE OF WATER CONDITIONS, HAVE
IT ANALYZED. CONSULT YOUR LOCAL WATER DEPARTMENT OR A COMPETENT WATER
CONDITIONER AGENCY. FAILURE OR MALFUNCTION OF THIS APPLIANCE DUE TO POOR
QUALITY OF WATER IS NOT COVERED UNDER THE WARRANTY.

Retain this manual for future reference.

Service Connections ........................................……............... 2

Functioning Mode ...................................................………..... 5

Capacities………………………………………………………… 6
Pan Selection…………………………………………………….. 6, 7

Time Schedules ................................................………........... 6, 7

Periodic Maintenance .........................................…................ 8

Operating Instructions..........................................……............ 15

Service Information .........................................……............ ... 16

Parts List .........................................................…………......... 23

Wiring Diagrams ..............................................………........... 37

WARNING — WARRANTY WILL BE VOID IF

A. SERVICE WORK IS PERFORMED BY OTHER THAN A QUALIFIED TECHNICIAN.
B. OTHER THAN GENUINE SOUTHBEND REPLACEMENT PARTS ARE INSTALLED.

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS
IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

KEEP AREA AROUND APPLIANCES FREE AND CLEAR FROM COMBUSTIBLES.
IN THE EVENT A GAS ODOR IS DETECTED, SHUT DOWN EQUIPMENT AT THE MAIN

SHUTOFF VALVE AND CONTACT THE LOCAL GAS COMPANY OR GAS SUPPLIER
FOR SERVICE.

southbend

1100 Old Honeycutt Road
Fuquay –Varina, NC 27526
[phone]
FAX [phone]
[phone]

COMPARTMENT STEAMER

ELECTRIC BOILER

USER'S GUIDE

LIMITED WARRANTY

Southbend warrants that the equipment, as supplied by the factory to the original purchasers, is free from defects in materials
and workmanship. Should any part thereof become defective as a result of normal use within the period and limits defined
below, then at the option of Southbend such parts will be repaired or replaced by Southbend or its Authorized Service Agency.
This warranty is subject to the following conditions:

If upon inspection by Southbend or its Authorized Service Agency it is determined that this equipment has not been used in an
appropriate manner, has been modified, has not been properly maintained, or has been subject to misuse or misapplication,
neglect, abuse, accident, damage during transit or delivery, fire, "flood, riot or Act of God, then this warranty shall be void.

Specifically excluded under this warranty are claims relating to installation; examples are improper utility connections and
improper utilities supply. Claims relating to normal care and maintenance are also excluded; examples are calibration of
controls, and adjustments to pilots and burners.
Equipment failure caused by inadequate water quality is not covered under warranty. WATER QUALITY must not exceed the
following limits: Total Dissolved Solids (TDS) - 60 PPM (Parts Per Million). Hardness - 2 Grains or 35 PPM, PH Factor

- 7.0 to 7.5. Water pressure 30 PSI minimum, 60 PSI maximum. Boiler maintenance is the responsibility of the owner and is not
covered by warranty.
This equipment is intended for commercial use only. Warranty is void if equipment is installed in other than commercial
application.

Repairs under this warranty are to be performed only by a Southbend Authorized Service Agency. Southbend can not be
responsible for charges incurred from other than Authorized Southbend Agencies. THIS WARRANTY MUST BE SHOWN TO AN
AUTHORIZED SERVICE AGENCY WHEN REQUESTING IN-WARRANTY SERVICE WORK. THE AUTHORIZED SERVICE
AGENCY MAY AT HIS OPTION REQUIRE PROOF OF PURCHASE. This warranty does not cover services performed at
overtime or premium labor rates nor does Southbend assume any liability for extended delays in replacing or repairing any items
in the equipment beyond the control of Southbend. "Southbend shall not be liable for consequential or special damages of any
nature that may arise in connection with such product or part." Should service be required at times which normally involve
overtime or premium labor rates, the owner shall be charged for the difference between normal service rates and such premium
rates. In all circumstances, a maximum of one hundred miles in travel and two and one half hours (25) travel time shall be
allowable. In all cases the closest Southbend Authorized Agency must be used. The actual warranty time periods and exceptions
are as follows:
This warranty only covers product shipped into the 48 contiguous United States and Hawaii, one year labor, one year parts
effective from the date of original purchase. There will be no labor coverage for equipment located on any island not connected
by roadway to the mainland. Exceptions to standard warranty, effective within above limitations:

Glass Windows, Door Gaskets, Rubber Seals, Light Bulbs, Ceramic Bricks,

Sight Glasses, Cathodic Descalers or Anodes ..…......………………………………………...................... 90 days material and labor

Stainless Steel Fry Pot.....................…………….…………………... .4 years extended material warranty on fry pot only — no labor

Stainless Steel Open Top Burners..………….………………...........4 years extended material warranty on burners only — no labor

Pressure Steam Boiler Shell .......…………………………........ Prorated 4 years extended warranty on boiler shell only — no labor

Boiler shells which have not been properly maintained will not be covered by warranty.

In all cases parts covered by a five year warranty will be shipped FOB the factory after the first year. Our warranty on all

replacement parts which are replaced in the field by our Authorized Service Agencies will be limited to three months on labor, six
months on materials (parts) effective from the date of installation. See LIMITED WARRANTY

- REPLACEMENT PARTS for conditions and limitations.
If the equipment has been changed, altered, modified or repaired by other than a qualified service technician during
or after the one year limited warranty period, then the manufacturer shall not be liable for any damages to any person
or to any property which may result from the use of the equipment thereafter.
"THE FOREGOING WARRANTY IS IN LIEU OF ANY AND ALL OTHER WARRANTIES EXPRESSED OR IMPLIED
INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS, AND CONSTITUTES THE ENTIRE
LIABILITY OF SOUTHBEND. IN NO EVENT DOES THE LIMITED WARRANTY EXTEND BEYOND THE DURATION
OF ONE YEAR FROM THE EFFECTIVE DATE OF SAID WARRANTY."

SOUTHBEND – Effective February 1, 1990

INSTALLATION & SERVICE CONNECTIONS

flow Prevention Device acceptable to BOCA Code or equivalent

MODELS: EC

-

2, EC

-3

SECTION 1:

FIG. 1

EDH-2 & EDA-2

Inches 7 5 ½ 15 22 18 4 ½ 11 4 ½ 13 11 2 3 31

mm 180 145 380 560 455 110 280 105 330 280 50 75 787

A B C D E F G H J K L H H

LEGEND

EC Field Hiring Electrical Connection to be as specified on Electrical Rating Label which is according to Customer's Order.

DR Appliance drain is 2" pipe size. Provide open air gap type drain.

CW Cold Water supply. Provide 3/8" copper tube.
HW Hot Water supply to Boiler. Provide 3/8" copper tube. A Back-

must be installed in this line.

ST Steam take-off locations to supply steam to adjacent units if desired.

2

INSTALLATION & SERVICE CONNECTIONS

SECTION 1: MODELS: EC-2 & EC-3

INSTALLATION INSTRUCTIONS
Ideally an Exhaust System should be provided directly above the Cooker in order to exhaust steam and heat

generated by the appliance.
Set Cooker in place and level appliance using spirit level.

Ascertain that a floor drain (open gap) is convenient to the appliance drain.
Mark hole locations on floor through anchoring holes provided in flanged adjustable feet.
Remove appliance and drill holes into locations marked on floor and insert proper anchoring devices.

Set Cooker back in proper position.
Re-level the appliance, leveling the unit to right and front to back. Appliance should be elevated on the right

1/16" to 1/8" to assure proper compartment drainage.
Bolt and anchor appliance securely to the floor. Seal bolts and flanged feet with Silastic or equivalent

compound.

Make service connections as indicated in LEGEND (Fig. 1) and test that appliance operates properly.

3

INSTALLATION & SERVICE CONNECTIONS

SECTION "I:

MODELS: EC-2 & EC-3

EDH-2 & EDA-2

START UP TEST RUN

If the appliance is equipped with a manual Slowdown Valve, close it.

Open left cabinet door and turn ON power switch. Pilot light win come on (green) and water will begin
to enter Boiler and required water level will be reached in about 3 minutes. Observe water gauge glass to
verify.

Steam generation will now commence and be completed in about "15 minutes. Observe that Boiler
Pressure Gauge indicates steam pressure in range of 9 to 12 psi.

The Pressure Gauge on the face of the Cooker Control Panel should indicate pressure of 5 to 6 psi.
Open Cooker compartment door. Dial Timer to 5 minutes and pull out Operating Handle and

observe that steam enters compartment.
With Operating Handle pulled out, dial Timer back to "O". The buzzer will now be audible and must be

silenced by releasing Operating handle. Check each compartment in a similar manner.
Close compartment door and turn Handwheel clockwise sufficiently to provide a good seal on door

gasket.
Dial Timer to 5 minutes. Pull out Operating Handle and set in position. Steam entry into compartment

will be audible and Compartment Vent, located at rear left side of Cooker compartment, will exhaust air
(hissing noise) trapped in the compartment until replaced by steam.

Observe that door gasket seals properly and no leaks are evident.
After 5 minutes the Timer will read '0', Buzzer will come on, steam will cease to 'enter compartment

and drain solenoid valve will open to exhaust steam and condensate from compartment.
Silence Buzzer by releasing Operating Handle.

Observe Appliance Drain that live steam from compartment is being cooled by cold water from Cold
Water Solenoid "Valve (thermostatically controlled). Turn Handwheel fully counter-clockwise to avoid
pressure on door gasket when not "in use. Check each compartment in a similar manner.

During simulation of the cooking cycle, the Heater Elements will cycle on and off to maintain steam
pressure in Boiler between 9 to 12 psi range.

Turn OFF power switch. If the appliance is equipped with Automatic Blow Down Solenoid Valve,
the Boiler contents water and steam, will be blown out and exhausted through the appliance Drain.
The Cold Water Solenoid Valve will now be activated as well. If, however, the appliance is
equipped with a manual Blow Down Valve, Open it.

4

STEAMER FUNCTIONING MODE

SECTION 2:

MODELS: EC-2 & EC-3

EDH-2 & EDA-2

Power, hot and cold water, must be supplied to these Steamers. Refer to Section 1, Service

Connections.

These Steamers are intended for use in commercial establishments. They are floor supported, are
steam heated and incorporate steel enclosures to contain live electrical parts.

The Cooker consists of two or three compartments and is the upper portion of the Steamer. Each
compartment is provided with its own Solenoids, Interlock Switches, Timer, Pilot Light, Operating Handle
and Door. When a compartment is off, or de-energized, the Exhaust Solenoid Valve is open and the inlet
Steam Solenoid Valve is closed. Pans, containing food properly portioned, are placed into guided racks or
unto wire shelves provided in each compartment. When the door is closed, the Timer dialed and the
Operating Handle is pulled out to the locked position, (which also locks the door and engages the Interlock
Switches), the valves are energized. Steam reduced to maximum 6 p.s.i. pressure by the Pressure
Regulating Valve will then be permitted to enter the compartment but not exit. Air, captured in the sealed
compartment is allowed to exhaust through the Compartment Vent which will close at approximately
180°F, whence the compartment becomes an entirely sealed chamber. The duration of the cooking cycle is
controlled by the Timer and when desired time has elapsed. Timer will read '0' and will set off an audible
Buzzer and de-energize valves. Buzzer must be silenced by releasing the Operating Handle and presumably
door opened to remove cooked food.

The Cabinet is the lower portion of the Steam and contains components which control the functioning of
the Electric Boiler. A switch located on the front face of the Generator Control Box, when turned ON will
provide power for the appliance and also initiate and maintain steam generation by means of Heater
Elements in the Boiler which in turn supplies steam to the compartments.

The Electric Boiler is designed to ASME Code and approved as a steam heating boiler restricted to operate
at pressures not to exceed 15 p.s.i..

Refer to Periodic Maintenance, Section 4, for detailed version of components and controls.

5

PAN SELECTION & TIME SCHEDULES

SECTION 3: MODELS: EC-2 & EC-3

COMPARTMENT CAPACITIES

The Cooker compartments are provided with either removable shelf supports with slide out shelves OR
universal pan supports. The following capacities for each compartment are based on full size, 12" x 20",
pans and depths indicated.

Shelf supports with shelving can accommodate:
6 - 2-1/2" deep full size pans or

4 - 4" deep full size pans or
2 - 6" deep and 2 - 2-1/2" deep full size pans.

Universal pan supports can accommodate:
8 - 2-1/2" deep full size pans or

4 - 4" deep full size pans or
2 - 6" deep and 2 - 2-1/2" deep full size pans.

Food placed in pans must, where possible, be evenly spread out and not protrude above pans since
steam circulation between pans in the compartment will be impeded.

Always preheat compartments for satisfactory results.
When a11 compartments are to be used at the same time, allow one compartment to recover steam

pressure (approx. 4-1/2 p.s.i.) before commencing cooking operation on next compartment.
When time does not allow for defrosting of frozen vegetables such as loose pack peas. corn, diced

carrots, etc., they may be cooked at once provided half suggested portions in Cooking Chart are used.

COOKING CHART

ITEM PAN DEPTH

(FULL SIZE) IN MINUTES PER PAN OF PANS

TIMER SETTING

WEIGHT LBS NUMBER

Beans 2-1/2" 10 - 12 5 1 - 3
Lima & Reg. Perforated 13 - 15

4-6
Beans 2-1/2" 15-20 6 1 - 3
Waxed Perforated 20 - 25

4-6
Broccoli 2-1/2" 8-10 6 1 - 3
Waxed Perforated 10 - 12

4-6
Broccoli 2-1/2" 10 - 15 6 1 - 3

1/2" - 3/4" Perforated 15-20 4-6
Stalks

Canned 2-1/2" 4-5 7 1 - 3
Vegetables Solid 5-8

4-6

6

Perforated

60 - 75 4-6

PAN SELECTION & TIME SCHEDULES

SECTION 3: MODELS: EC-2 & EC-3

COOKING CHART - cont'd

ITEM PAN DEPTH

(FULL SIZE)

TIMER SETTING

IN MINUTES

WEIGHT LBS

PER PAN

NUMBER
OF PANS

Carrots (sliced) 2-1/2" 18 - 21 9 1 - 3

Perforated 21 - 25

4-6

Corn 2-1/2" 9-10 5 1 - 3

Perforated 11 - 13

4-6
Chicken 2-1/2" 18 - 25 8 1 - 3
Blanched-Cut Perforated 25 - 30

4-6
Eggs - out of 2-1/2" 6-7 4 dozen 1 - 3
Shell Solid 7-8

4-6
Eggs - in 2-1/2" 2-3 3 dozen 1 - 3

Shell Perforated 4-6

4-6
Fish-Fillets 2-1/2" 8-12 3 1 - 3

Perforated 10 - 15

4-6
Meatloaf 2-1/2" 35 - 40 15 1 - 3

Solid for Broth 40 - 45

4-6
Peas 2-1/2" 6-7 5 1 - 3

Perforated 8-9

4-6
Potatoes cut 2-1/2" 20 - 25 10 1 - 3
Regular Perforated 25 - 30

4-6
Potatoes cut 2-1/2" 15 - 18 10 1 - 3

French Fry Perforated 18 - 20

4-6
Spinach 4" 3-5 3 1 - 2
cut, cleaned Perforated 4-6

3-4
Rice 4" 22 - 24 4 1 - 2
1 Gallon Water Solid -,25-27

3-4
Spaghetti 4" 20 - 22 3 1 - 2

1-3/4 Gal. Water Solid 23 - 26

3-3
Turkey 2-1/2" 50 - 60 10 - 12 1 - 3

7

PERIODIC MAINTENANCE

SECTION 3: MODELS: EC-2 & EC-3

FIG. 2

8

PERIODIC MAINTENANCE

SECTION 4: MODELS: EC-2 & EC-3

Steamers are made of two sections, the Cabinet and the Cooker.
Fig. 2: The Cabinet is the lower section of the Steamer and not only does it provide a base for the

Cooker to be positioned at a proper working height but also provides the enclosure for the Electric
Boiler and Controls.

FRONT VIEW Item A: Electric Boiler weldment assembly.

Item B: Handhole Cover Assembly when unbolted and removed allows internal examination and
cleaning of Boiler if required.

AT LEAST TWICE A YEAR, UNBOLT AND REMOVE HANDHOLE COVER
ASSEMBLY. INSPECT INTERIOR OF BOILER FOR SCALANT AND LIME
BUILD UP.

Item C: Safety Thermostat, shown enclosed within Thermostat Cover Box, is a protective device
which will shut off the Heater Elements should the water level in the Boiler drop below a level
sufficient to immerse and protect the Heater Elements. The heat sensing Capilliary Bulb of the
Thermostat enters the Boiler through the Boiler Head and is attached to an upper leg of one of the
Heater Elements and will remain inopperative while immersed in water.

Item D: Heater Elements located within the lower portion of the Boiler provide the heat required to
generate steam in the Boiler. During operation of the appliance, water level must be sufficient to
immerse and protect the Elements.

Item E: Solenoid (Cold Water) Valve is fastened to the right rear bottom of Generator Control Box.
This valve supplies cold water to condense live steam before it exhausts into the drain and its
functioning is controlled by a thermostat.

Item F: Solenoid (Hot Water) Valve is fastened to the bottom of Generator Control Box immediately
in front of Item E. This valve feeds hot water to the Boiler but its functioning is entirely dependent on
the Water Level Control (Item Q).

Item G: Operating Pressure Switch is fastened to the inside bottom-front of the Generator Control
Box and is plumbed to sense the pressure in the Boiler and thence control the operating cycle of the
Contactors (item 0) through which the Heater Elements must obtain power for steam generation.
This switch is factory set to energize and dose the contacts (of the Contactors) to allow power to the
Elements at 9 psi but to de-energize them and shut off power to the Elements at 12 psi thus
maintaining a pressure range in the Boiler between 9 psi to approximately 13 psi (override con­sidered).

9

PERIODIC MAINTENANCE

SECTION 4: MODELS: EC-2 & EC-3

Item H: Hi-Limit Switch is similar to and is "located directly behind the above switch (Item G). It is a
protective device intended to de-energize the Contactors and hence shut off power to the Heater
Elements at approximately 14 p.s.i. and will only function if the Operating Pressure Switch fails.

Item J: Transformer. Primary Voltage as per Customer specifications. Secondary at 120V.
Item K: Power Switch is fastened to the front face of the Generator Control Box and when switched

ON will automatically begin the steam generating process in the Boiler.
Item L: Pilot Light is located directly above the Power Switch and when lit (green) indicates power is

ON.
Item M: Fuse is fastened to the Front Face of the Generator Control Box and is a protective device to

prevent excessive power being supplied to the Secondary Lines.
Item N: Generator Control Box is fastened permanently to the left top portion of the Cabinet directly

behind the left cabinet door. It contains provisions for field wiring and a number of controls. A
removable bolted cover panel is provided for internal access.

Item 0: Contactors are fastened to the rear wall of the Generator Control Box. Refer to Item G on
functioning mode.

Item P: The Water Gauge assembly has a glass tube to permit visual verification the water level is
being maintained in the Boiler during operation. The manual valves at the top and the bottom of this
assembly must be fully open and only closed if damage should occur to the glass tube.

OBSERVE THAT THE WATER IS CLEAN AND CLEAR IN THE GLASS TUBE.
THE APPEARANCE OF EXTREME MURKINESS IN THE WATER INDICATES
INADEQUATE WATER QUALITY AND WILL CUASE FAILURE OF
CONTROLS AND THE APPLIANCE. WARRANTY DOES NOT COVER
MALFUNCTION DUE TO POOR WATER CONDITIONS.

Item Q: The Water Level Control is a mechanical switch intended to maintain proper water level in the
Boiler. A Float is contained within the chamber of the Water Level Control and when it drops, it wilt trip
the switch in the control and demand sufficient water to replenish it to the proper level.

A MANUAL VALVE IS LOCATED DIRECTLY BELOW THE WATER
LEVEL CONTROL CHAMBER MUST BE OPENED BRIEFLY AT LEAST
ONCE A WEEK TO BLOWDOWN SEDIMENT AND SCALANT THAT MAY
BE LODGED IN THE CHAMBER. FAILURE TO DO SO MAY CAUSE
EXCESSIVE ACCUMULATION, SEIZURE OF THE FLOAT AND EVEN­TUAL MALFUNCTION OF THE WATER LEVEL CONTROL.

10

PERIODIC MAINTENANCE

SECTION 4: MODELS: EC-2 & EC-3

Item R: The Pressure Gauge is directly above and threaded to the Water Level Control. It should read
'0' during shut down and function in a range of approximately 9 to 13 p.s.i. during operation of the
appliance.

SIDE VIEW
Items S: Safety Valve is a protective device set at 15 p.s.i. Malfunction or improper setting of controls

may allow the pressure to exceed 15 p.s.i. in the Boiler and will consequently set off this valve.

ONCE A WEEK THIS VALVE SHOULD BE TRIPPED DURING
OPERATION TO ASSURE THAT IT FUNCTIONS PROPERLY.

Item T: Pressure Regulator reduces the pressure of the steam supplied from the Boiler to the Steam
Header and the Cooker compartments.

TWICE A YEAR UNSCREW THE LARGE HEX HEAD PLUG LOCATED
AT THE BOTTOM OF THE REGULATOR AND REMOVE AND CLEAN
THE STRAINER.

Item U: A Thermostatic Steam Trap is plumbed to the steam supply piping from the Boiler and is a
mechanical device that closes on high temperatures and opens when the temperature drops. This Trap
allows water formed from condensed steam to exhaust into the appliance Drain but will retain steam
being of a higher temperature.

Item V: Drain for compartments and Boiler approximately 2" pipe size. Must be provided with open air
gap type floor drain.

Item W: Boiler Blow down Valve is plumbed to the drain pipe of the Boiler and when specified as
automatic will be a solenoid (electrically operated) valve which will dose when energized in order to
facilitate maintenance of. proper water level in the Boiler.

HOWEVER, THE STEAMER SHOULD BE SWITCHED OFF AT LEAST
ONCE DAILY WHICH WILL DE-ENERGIZE AND OPEN THE VALVE IN
ORDER FOR THE BLOWDOWN PROCEDURE TO OCCUR AND RE­MOVE SEDIMENTS, SCALANTS AND LIME BUILD-UP IN THE BOILER.
IF THE APPLIANCE IS SUPPLIED WITH A MANUAL VALVE. IT SHOULD
BE OPENED DAILY WHEN THE APPLIANCE IS SHUT DOWN.

Item X: A Thermostat is mounted on the side wall of the Cooker (See Fig. 3) and its heat sensing
capillary bulb is fastened to the appliance drain (Item V). When excessive heat (i.e. steam) comes in
contact with the bulb, the Thermostat will energize the Cold Water Solenoid Valve (Item E).

11

SECTION 4:

FIG. 3

PERIODIC MAINTENANCE

MODELS: EC-2 & EC-3

STEAM

EXHAUST

TO DRAIN

IN

12