Amana RST, RSS User Manual

Service
RST and RSS Gas Ranges
Models and manufacturing numbers
in this manual see page 2A.
Service Manual for Caloric
®
This manual is to be used by qualified appliance technicians only. Amana does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person.
RC231002 Revision 3
May 1998
INDEX
General Information. ............................................................................................. 3 - 6
Installation Instructions.......................................................................................... 7 - 20
Safe Operating Procedures ................................................................................... 21 - 23
Operation And Service Procedure
Electronic Clock Timer (Slide in Models) ......................................................... 24 - 31
Electronic Range Control (Two Piece Control) ................................................ 32 - 45
Electronic Range Control (One Piece Control) ................................................ 46 - 55
Automatic Electronic Timer .............................................................................. 56 - 59
Cook And Off Clock Timer ............................................................................... 60 - 64
Clock Timer - Mechanical ................................................................................ 65 - 66
Automatic Electronic Timer (Solid State) ......................................................... 67 - 69
Bake And Broil Ignitors, Electric Gas Valve ..................................................... 70
Selector Switch, Oven Thermostat .................................................................. 71
Spark Module, Spark Switch ............................................................................ 72
Door Latch Mechanism, Latch Switch ............................................................. 73
Troubleshooting Guide .......................................................................................... 74 - 84
Disassembly Procedures....................................................................................... 85 - 99
Upper Oven Operation And Service Procedures .................................................. 100 - 106
Wiring Diagrams and Schematics ......................................................................... 107 - 123
REPLACE MANUAL 56397 AND 56074 WITH THIS MANUAL, RC231002.
REV. 1 - ADDED RSS MODELS TO MANUAL.
REV. 2 - ADDED RST382UK, P1141228N; RST388UWW, P1141246N; and RST399UL/W, P1132642N.
RC231002 Rev. 3 2
MODEL AND MANUFACTURING NUMBERS
MODEL M/N
RSS307 RSS307-OF RSS343 RSS352-OF RSS353-OF RSS354-OF RSS355-OF RSS356UL P1141233N, P1141234N, P1130975N RSS356UW P1141233N, P1141234N, P1130975N RSS358UL P1130875N, P1141226N, P1130974N RSS358UL P1141231N RSS358ULG P1141218N, P1141226NLG, P1141232N RSS358ULGCO P1141219N RSS358UW P1130875N RSS358UW/L P1141231N RSS358UWG P1141218N, P1141226NWG, P1141232N RSS358UWGCO P1141219N RSS359 RSS359-OF RSS361 RSS361-OF RSS363 RSS363-OF RSS369 RSS369-OF RSS380 RSS380-OF RST307 RST308UK P1130723N, P1130725N, P1130727N RST308UW P1130723N, P1130725N, P1130727N RST308UL P1130723N, P1130725N, P1130727N RST308UWW P1130724N, P1130725N RST308UWW1 P1130726N, P1130728N RST309 RST354 RST359 RST361 RST362 RST365 RST369 RST376 RST378UL P1141203N RST378UW P1141203N RST380 RST381 RST382UK P1141220N, P1141228N RST387 RST388UWW P1141221N, P1141229N, P1141246N RST3997UL/W P1132635N, P1132642N, P1132621N, P1132622N
2A RC231002 Rev. 3
IMPORTANT INFORMATION
Great pride and workmanship go into every product to provide our Customers with the highest possible quality. We realize, however, that during its lifetime the product may require service. The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools and testing instruments.
REPAIRS COVERED IN THIS MANUAL THAT ARE MADE BY UNQUALIFIED PERSONS CAN RESULT IN HAZARDS DUE TO IMPROPER ASSEMBLY OR ADJUSTMENTS SUBJECTING INEXPERIENCED PERSONS MAKING SUCH REPAIRS TO THE RISK OF INJURY OR ELECTRICAL SHOCK WHICH CAN BE SERIOUS OR EVEN FATAL.
IMPORTANT NOTE TO CONSUMER
IF YOU PERFORM SERVICE ON YOUR OWN PRODUCT, YOU MUST ASSUME RESPONSIBILITY FOR ANY PERSONAL INJURY OR PROPERTY DAMAGE WHICH MAY RESULT. AMANA WILL NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM IMPROPER SERVICE AND/OR SERVICE PROCEDURES.
In order to locate an authorized service agency. please consult your telephone book or the dealer from whom you purchased this product. If you require further assistance, please contact:
CUSTOMER RELATIONS DEPT. OR 1-319-622-5511 AMANA, IOWA 52204 CALL and ask for the
Customer Relations Department
Users of Caloric products outside of the United States and Canada should contact:
EXPORT CUSTOMER RELATIONS DEPARTMENT AMANA REFRIGERATION, INC. AMANA, IOWA 52204, USA TELEX: 4330076 AMANA CABLE: "AMANA", AMANA, IOWA, USA
RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS
DANGER - Immediate hazards which WILL result in
severe personal injury or death.
WARNING - Hazards or unsafe practices which COULD result in severe personal injury or death.
CAUTION - Hazards or unsafe practices which COULD result in minor personal injury or product or property damage.
RC231002 Rev. 3 3
GENERAL INFORMATION
F
r
e
e
o
V
V
V
GENERAL INFORMATION
This manual provides you with complete instructions and suggestions for handling, installing, and servicing Caloric Self-Cleaning Gas Ranges.
This manual is based on information gained through experience and careful testing. This information, if fol­lowed carefully, will assure the customer of proper unit operation with a minimum of servicing requirements, thus insuring the maximum benefits of clean, modern cooking. Unless the unit is properly installed and carefully ex­plained, the customer will not receive the utmost advan­tages that gas cooking provides.
Feel free at all times, to call Caloric to discuss any problems which may not be fully understood.
Refer to the Parts Catalog when replacement parts are needed.
MODEL IDENTIFICATION
The correct model number, manufacturing number (MN or P), and serial number should be known prior to ordering parts so that incorrect shipments and delays can be avoided. (See Rating Label example.)
The rating label is located in the burner box of the unit and can be observed by raising the main top. The rating label on sealed burner units is located on the front frame behind the storage drawer.
The wiring diagram is located on the bottom of the storage drawer assembly.
E
Electric
R
Gas
T
Trash Compactor
H
Vent Hood
Microwave
M
CALORIC MODEL DESCRIPTION BREAKDOWN
R S T 3 8 O
PRODUCT
LINE
PRODUCT TYPE SERIES
C
Convertible
H
High Boil
J
Hi-Broil w/ Cont. Cleaning Panels Upper Oven Microwave
K
Lower-Self Cleaning Low boil Low Boil w/
L
Cont. Cleaning
M
Panels Portable Self-Clean
P
Cook Top
S
Under-Counter
T
Wall Oven
U
Wall Oven w/
W
Cont. Cleaning
X
Panels Self-Cleaning Wall Oven
Y
Micro­Combination
R
D S T01
2 3 4 6
WIDTH
ON TOP
No Width Required 15" - 18" 20" - 18" 30" - 35" 40" - 42" 36"
BACKGUARD FEATURE
0
No Backguard
1
Plain Rail/ Laminated Top Plain Rail/
2
Cutting Board 4" Backguard
3
w/Auto-Timer Special
4
Designation Standard
5
Deluxe
6
Backguard Special
7
Designation Deluxe
8
Backguard Double Decker
9
Varible N
Natu
L
Bottl
U
Univ
X
Exp
1
115
2
230
8
208
RC231002 Rev. 3 4
GENERAL INFORMATION
RECEIVING
Inspect unit thoroughly at time of delivery. Report any visible damage to the carrier immediately. If the damage is "concealed" and not discovered until after delivery has been accepted, make a "concealed damage report" to the carrier. "Concealed damage report" forms may be ob­tained from the carrier's agent.
This procedure must be followed: All shipments, i.e., complete range or parts, are shipped at the buyer's risk. Manufacturer's responsibility ends when the consignment is accepted by the carrier in "good order". Manufacturer will give every assistance on damage claims by supplying any necessary supporting papers, such as invoices or bills of lading. It must be understood that this assistance does not imply acceptance of responsibility for settlement of such claims. Claims for loss or damage cannot be de­ducted from the invoice or payment of the invoice cannot be withheld pending adjustment of claims. Do not return any unit or parts for credit without written consent.
CARE AND HANDLING OF PORCELAIN ENAMEL
1. Porcelain enamel is glass that has been fused onto a metal surface. Because it is glass, however, it cannot be guaranteed.
It is impossible to make perfect color match in com­mercial enamel, and occasional variations must be expected. Minor imperfections are not just causes for complaint or rejection.
Porcelain will not stand heavy, sharp blows from cooking utensils or any other object.
soon as cool enough using dry cloth. If not cleaned, there may be noticeable smoke, odor, or visible dirt the next time the unit is used.
3. Crazing - Craze is the name given to the small hair line marks which are sometimes found in enameled surfaces after use. They look like little cracks, but they are not. The enamel around them will never chip or peel off due to these marks. As we cannot guarantee enamel against crazing or discoloration, the customer should be informed as to the proper care of enamel.
To the customer, any mark is a defect, as they do not understand enamel. They are afraid the enamel will peel or crack off leaving a rusty spot. This is not true as craze marks will never peel or crack. A craze mark is simply a place where the outer coat of enamel has separated. The dark color that appears in the crack is dust that catches in the opening.
To service a craze complaint, it is best to use the following: Explain crazing to the customer using as an illustration the effect of hot water in a cold glass ­it cracks. Compare it to the hairlines in dishes and cups due to continued heating and cooling. If the customer can be made to understand that the enamel will never come off, the customer will be satisfied.
One point to remember with service calls on crazing is to take care of it immediately. The longer the customer has to wait, the worse it appears to her. While this is true of all service work, it is especially true of crazing complaints. Make it a point to go out the same day the complaint is received.
In cleaning enamel, soap and water will usually suffice. Remove any discoloration promptly, but do not apply cold water to a hot surface.
Fruit juices, vegetable acids, sour milk, or strong mineral acids may discolor or etch enamel.
2. Cleaning Broiler Pan
For simplest method of cleaning, it is recommended that broiler pan be submerged in warm water imme­diately after use. Use a stiff brush, if necessary. Reheating broiler pan after it has been used without cleaning will result in fats and greases burning on and becoming much more difficult to remove.
NOTE: After the food has been removed from the oven or broiler, and the unit has been turned off, leave the oven and broiler door open for a few minutes to dry out the interior. If food has cooked over or grease has spattered the interior, clean the parts thoroughly as
CARE AND HANDLING OF CHROME, GLASS, OR METAL FINISH
To keep the stainless, chrome, or glass finishes "looking new" wash with soap and water, rinse, then dry with a clean cloth. If a polish is necessary, only the highest quality chrome cleaning compounds are recommended.
Finger marks and smears may easily be removed with a mild cleaner such as glass wax and simonize cleaner. Such agents should be used sparingly. Never use ordinary steel wool as it may leave a film of iron which will rust and discolor creating the illusion that the finish is rusting.
Never use harsh, gritty cleaners which can "age" or dam­age the porcelain and/or polished metal trim.
Never use strong chemical oven cleaners in a self-clean oven. They are unnecessary and their residues can produce noxious odors during self-clean, with oven tem­peratures of 900°F. or more.
5 RC231002 Rev. 3
GENERAL INFORMATION
SPECIFICATIONS - Burner Ratings - RST
Non Sealed Nat 10,000 BTU/HR Top Burner LP 7,000 BTU/HR
Sealed Top Nat 9,000 BTU/HR Burner LP 7,000 BTU/HR
Cast Sealed RST/RSS Top Burner
Large (3) Nat 9,000 BTU/HR
LP 8,000 BTU/HR
Small (1) Nat 7,000 BTU/HR
LP 6,000 BTU/HR
Oven Burner Nat 15,500 BTU/HR Lower LP 15,000 BTU/HR
Broil Nat 15,500 BTU/HR Burner LP 13,000 BTU/HR
Oven Burner Nat 12,000 BTU/HR Upper LP 12,000 BTU/HR
BURNER ORIFICE SIZES - Universal Models
SPECIFICATIONS - Burner Ratings - RSS
NON SEALED Top Burner Nat 10,000 BTU/HR Top Burner LP 8,000 BTU/HR
Oven Burner Nat 15,5000 BTU/HR Lower LP 15,500 BTU/HR
Broil Nat 15,500 BTU/HR Burner LP 13,000 BTU/HR
Non Sealed Top Burners are equipped with #54 double coaxial orifices and universal pin.
Sealed Top Burners are equipped with a 4-#54 orifice spud for natural gas and separately packed 4-#68 orifice spud to convert to LP gas.
or beginning October 22, 1990 at serial number F0430127550 the venturi type top burners are equipped with #54 double coaxial orifices and universal pin.
Cast Sealed Top Burners are equipped with 3-#54 double coaxial orifices with universal pins and 1-#56 double coaxial orifice with universal pin.
Lower Oven Burner is equipped with a #50 double coaxial orifice and universal pin.
Broil Burner is equipped with a #54 orifice spud and separately packed orifice spud to convert to LP gas.
Upper Oven Burner is equipped with a #52 double coaxial orifice and universal pin.
ELECTRICAL REQUIREMENTS
These ranges should be connected to a separate 115 volt, 60 cycle AC three-wire "U" ground receptacle, parallel slots.
RC231002 Rev. 3 6
INSTALLATION INSTRUCTIONS
SUGGESTED LOCATION OF SERVICE PIPE - REAR WALL OR FLOOR
FIGURE 1
UNIVERSAL MODELS (Nat or LP Gas)
The regulator is factory adjusted for natural gas with a supply line pressure of not less than 6-inches water column pressure (W.C.P.). With the regulator adjusted for lique­fied petroleum (LP) gas, the minimum supply pressure is 11 inches W.C.P. For conversion procedure to LP gas see the section on regulators and LP conversion procedures.
Cabinet Installation opening for gas slide-in range. See Page 10.
FIGURE 2
FIRE OR EXPLOSION HAZARD
THE MAXIMUM GAS SUPPLY PRESSURE FOR THESE MODELS MUST NOT EXCEED 14-INCHES W.C.P.
Top View
Figure 3
7 RC231002 Rev. 3
INSTALLATION INSTRUCTIONS
INSTALLATION
Location
The location of the range should be selected so proper illumination, freedom from drafts, and convenience to other appliances in the kitchen are obtained. Carefully level the range, using the leveling legs provided. The range must be level in order to assure uniform cooking and baking. A level or a large pan of water placed on an oven rack or on top of range can be used to level the unit. The range is to be installed flush to rear wall, and may be installed flush to side base cabinets. Spacing to vertical side wall above cooking surface 3" (as shown in Figure 2), 6" (as shown in Figure 3), for ranges with elevated ovens. Minimum distance to horizontal combustible surface above cooking surface is 30" and must be the width of the range. Maximum depth of cabinets installed above the range is 13".
Ranges With Elevated Ovens
Figure 5
It is the responsibility of the installer to comply with the installation clearances specified on the rating plate attached to the appliance.
Single Ovens
Figure 4
NOTE: Clearance specified to combustible construction (walls and materials) are based on a temperature rise of wood structures resulting from appliance operation. These clearances are suitable for walls of studding, lath and plaster, or other types of combustible materials which have a density of 20 pounds per cubic foot or more. No evaluation of the clearances required has been made for installations adjacent to low density cellulose, fiber board, and similar materials which have a density of less than 20 pounds per cubic foot; nor to plastic tiles, or sheeting.
SECURE RANGE TO HOUSE STRUCTURE
For safety consideration means have been provided for this range, except one having an elevated oven, to be secured to th house wall behind the range, METHOD 1# (see Figure 5A). If the wall behind the range is solid wood or a vertical stud is available, a wood screw or lag bolt of sufficient length may be employed to secure the range. If the wall behind the range is not solid such as paneling or dry wall (sheet rock) construction use of a Molly Bolt is required. The anchor portion of the Molly Bolt should be of sufficient lenght to hold it securely to the building material. The thicker the material, the longer the anchor portion must be.
RC231002 Rev. 3 8
INSTALLATION INSTRUCTIONS
Figure 5A
IN MOBILE HOMES:
Any installtion in a mobile home must conform with the Manufactured Home Consutruction and Safety Standards. Title 24CFR, Part 32-80 (in Canada, CSA standard Z240,4-
1) or when such standard is not applicable, with the local codes.
For mobile home installation it is necessary to use alter­nate METHOD #2 (see Figure 5A) to secure range to floor. See rating label to determine if range can be used in this application.
ANY OPENINGS IN THE WALL BEHIND THE RANGE OR THE FLOOR UNDER THE RANGE MUST BE SEALED.
Where local codes permit, a TEMPORARY CONNEC- TION may be made to properly ground a two-prong wall receptacle by the use of an adaptor which is available at most local hardware stores.
An adaptor plug can temporarily be used (see Figure 4) preferably with polarized male blades. If an unpolarized adaptor plug must be used, determine which is the "hot" side and ground. Place an identifying mark on the adaptor to assure proper polarization in the future.
Figure 6
ATTACHING THE ADAPTOR GROUND WIRE TO THE WALL RECEPTACLE COVER SCREW DOES NOT GROUND THE APPLIANCE UNLESS THE COVER SCREW IS GROUNDED THROUGH THE HOUSE WIRING.
If there is any doubt as to whether the wall receptacle is properly grounded, the customer should have it checked by a qualified electrician.
DO NOT, UNDER ANY CIRCUMSTANCES, CUT OR REMOVE THE THIRD (GROUND) PRONG FROM THE POWER PLUG.
ELECTRICAL CONNECTIONS
FIRE OR EXPLOSION HAZARD
FOR GROUNDING - THIS APPLIANCE MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL CODES, OR, IN THE ABSENCE OF LOCAL CODES, WITH THE NATIONAL ELECTRIC CODE, ANSI/ NFPA NO. 70-1990. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN ELECTRIC SHOCK, PERSONAL INJURY OR DEATH.
The power cord on this appliance is equipped with a three­prong (grounding) plug which mates with standard three­prong (grounding) receptacles.
Where a standard two-prong wall receptacle is en­countered, it is the personal responsibility and obligation
of the customer to have it replaced with a properly grounded three-prong wall receptacle.
9 RC231002 Rev. 3
INSTALLATION INSTRUCTIONS
CONNECTING TO GAS SUPPLY LINE
Access to connection is behind bottom storage drawer. The pressure regulator has a 1/2" female pipe thread. It is recommended that a 1/2" close nipple, a union and shut­off valve, be assembled into the regulator. This places the assembly for each connection to the gas supply and access to the shut-off valve as illustrated in Figure 1.
The gas supply pipe to the range should be 3/4" rigid pipe then reduced to 1/2" pipe at the pressure regulator. If a long run of fuel is required, a larger size pipe may be required. With the liquified petroleum (LP) gases, the size of the piping or tubing can be 1/2" minimum. LP gas suppliers usually determine the size and material used on the system. We do not recommend that flexible connectors be used in connecting our appliance to the gas supply, unless American Gas Association approved. Poorly designed connectors can be a source of gas leak. Even when AGA approved flexible connectors are used the customer should be cautioned against kinking or damaging the connector when moving the range for cleaning or any reason. This could cause a gas leak.
A shut-off valve should be installed in the line supplying gas to the range. Check local building codes and utility requirements. (See Figure 1 for details.)
A suitable pipe thread sealing material should be used, which is approved for use with LP gases.
Caloric ranges are designed for easy connection between the supply line and the inlet fitting. However, all strains must be removed from the supply and fuel lines so the range will be level and in line.
Use two (2) wrenches when connecting to the regulator.
burner valves should be closed and the gas supply turned on. All connections in the gas supply line and in the range should be tested with soap suds for any leaks. If a leak is present, bubbles will appear. The leak should be corrected by tightening the joint, or unscrewing it completely and applying additional dope. Any connections which may have been disturbed should be tested for leaks.
FIRE OR EXPLOSION HAZARD
A LIGHTED MATCH OR FLAME SHOULD NEVER BE USED WHEN TESTING FOR LEAKS. ALL FITTINGS AND CONNECTIONS HAVE BEEN TIGHTENED AND TESTED AT THE FACTORY. IF A LEAK IS DETECTED, TIGHTEN THE FITTING, DO NOT USE PIPE DOPE ON FACTORY FITTINGS.
The gas supply pipe to the range should be 3/4" rigid pipe then reduced to 1/2" pipe at the pressure regulator. If a long run of fuel line is required, a larger size pipe may be required. With liquefied petroleum (LP) gases, the size of the piping or tubing can be 1/2" minimum. LP gas suppliers usually determine the size and material used on the system. We do not recommend that flexible connectors be used in connecting our appliance to the gas supply, unless American Gas Association approved. Poorly designed connectors can be a source of gas leak. Even when AGA approved flexible connectors are used the customer should be cautioned against kinking or damaging the connector when moving the range for cleaning or any reason. This could cause a gas leak.
A shut-off valve should be installed in the line supplying gas to the range. Check local building codes and utility requirements.
A suitable pipe thread sealing material should be used, which is approved for use with LP gases.
FIRE OR EXPLOSION HAZARD - LEAK TEST COMPONENTS AFTER CONNECTION.
THE REGULATOR IS DIE CAST AND WILL CRACK, RESULTING IN A GAS LEAKAGE AND POSSIBLE FIRE OR EXPLOSION, IF YOU MAKE THE CONNECTION TOO TIGHT.
The stack on the regulator must be in vertical position. BE SURE to use pipe dope to seal connections.
Be sure the shut-off valve is open between the inlet nipple and gas valve.
TEST FOR GAS LEAKS
After the final gas connection has been made, all the top
RC231002 Rev. 3 10
Caloric ranges are designed for easy connection between the supply line and the inlet fitting. However, all strains must be removed from the supply and fuel lines so the range will be level and in line.
INSTALLATION INSTRUCTIONS
3. From the right rear edge of the prepared cutout, measure the distance "A" and mark a point. Repeat this procedure for the left hand side, then draw a straight line between these points. (See Figure A.)
Figure 8
4. Place the bracket with the inside edge against the straight line and the end against the cabinet side. (See Figure C.) If you do not have cabinets on both sides of the range, it will be necessary to measure the width of the range (W) and place the bracket at the appropriate location. (See Figure D.) Mark two (2) hole locations.
INSTALLATION INSTRUCTIONS FOR ANTI-TIP BRACKET
To Install Anti-Tip Bracket, Carefully Follow these Instructions:
1. Prepare counter cutout per range Installation Instruc­tions.
2. Measure the distance from the range leveling leg shaft to the rear most projection of the range. (See Figure A). This will be referred to as distance "A".
Figure 7
Figure 9
5. If mounting into wood flooring, drill two (2) 3/32" holes as marked. If mounting into concrete, using a ma­sonry drill bit, drill two (2) 3/16" holes and insert plastic anchors. Position bracket and mount using supplied screws.
6. Turn the leveling legs out approximately 1/4". The range may now be pushed into position. Remove the storage drawer and check that the leg has engaged the mounting bracket. If it has not, the bracket must be relocated to ensure engagement of the leveling leg into the bracket. If the range is moved from its original mounting location, the bracket must be removed and used for the new mounting location.
Figure 10
11 RC231002 Rev. 3
INSTALLATION INSTRUCTIONS
CABINET INSTALLATION OPENING FOR GAS SLIDE-IN RANGE
A. Cabinet cutout must be prepared as shown in Figure
11. Never install a range over kitchen carpeting.
Figure 11
LO BACK RAIL SLIDE-IN MODEL
B. For electric and gas connection specifications refer to
instructions for installing automatic pilotless ignition gas range.
C. On post formed (moulded) tops, shave the front
corner of cabinet opening flush with countertop in area which will be underneath front corners of range top (3/8"). (See Figure 12.)
Figure 12
D. On countertops with front metal trim, cut metal trim
back 3/8" from front corner of opening. (See Figure
--.)
and turned fully counterclockwise, the electrode be­tween the flash tubes will start sparking and continue as long as the knob is held in this position. After the burner ignites, move the knob to the "ON" position of the valve. At this time the sparking will cease. There are no standing pilots that have to be lighted or adjusted.
2. Top Burner Adjustment The air shutter (see Figure 5) should be adjusted to a proper flame. Loosen the air shutter lock screw and adjust the air shutter so the flame has an inner cone of bluish-green and an outer mantle of dark blue. The flame should be soft in character. Tighten the lock screw when the adjustment is complete.
Figure 14
NATURAL GAS BURNER ADJUSTMENT
Models with Sealed Top Burners (Below Serial Number F0430127550)
1. Top Burners Whenever a top burner gas valve knob is depressed and turned fully counterclockwise, the electrode built into the burner cap will start sparking and continue as long as the knob is held in this position. After the burner lights, move the knob to the "HI" position of the valve. At this time the sparking will cease. There are no standing pilots that have to be lighted or adjusted.
2. Top Burner Adjustment No gas input adjustment is necessary as the burner is equipped with a fixed orifice. There is no shutter to adjust.
Figure 13
ADJUSTMENTS AND LP CONVERSION
NATURAL GAS BURNER ADJUSTMENT
Models Without Sealed Top Burners
1. Top Burners Whenever a top burner gas valve knob is depressed
RC231002 Rev. 3 12
Low burner flame may be adjusted by turning adjust­ment screw in center of valve stem. Normally, the low flame should be adjusted to the minimum steady blue flame. Check the adjustment by turning from high to low several times to see that the burner does not go out.
Figure 15
Top Burner Setting
OR
INSTALLATION INSTRUCTIONS
Models with Sealed Top Burners (Above Serial Number F0430127550)
The air shutters (see Figure 6) should be adjusted for a proper flame. Adjust the air shutter so that the flame has an inner cone of bluish-green and an outer mantle of dark blue. The flame should be soft in character. To adjust the air shutter to close the opening to decrease the air or enlarge the opening for more air. Tighten the lock screw when the adjustment is complete.
Low burner flame may be adjusted by turning adjustment screw in center of valve stem. Normally, the low flame should be adjusted to the minimum steady blue flame (approximately 1/4" flame length). Check the adjustment by turning from high to low several times to see that the burner does not go out.
Figure 17
LOWER OVEN BURNER - RST
The appearance of properly adjusted oven burner flame is a bluish-green inner cone and a dark blue mantle. The flame characteristics should be clean and soft with no yellow tips. Blowing or lifting of the flame should not occur.
Figure 16
Models with Cast Top Burners
The air shutters (See Figure 7) should be adjusted for a proper flame. Adjust the air shutter so the flame has an inner cone of bluish-green and an outer mantle of dark blue.
For Access to the Air Shutters:
Lift off four (4) burner caps. Remove one (1) screw at each burner body. Pull each burner body upwards and discon­nect the ignition wire at the electrode. Remove one (1) flat headed screw at each burner and lift off main top. Remove plenum box covers (when so equipped).
To Adjust the Air Shutter:
Loosen the lock screw. Move the air shutter to close the opening to decrease the air or enlarge the opening for more air. Tighten the lock screw when the adjustment is com­plete.
Low burner flame may be adjusted by turning adjustment screw in center of valve stem. Normally, the low flame should be adjusted to the minimum steady blue flame (approximately 1/4" flame length). Check the adjustment by turning from high to low several times to see that the burner does not go out. (See Figure 8.)
1. An electric ignitor is used to light the burner. DO NOT attempt to insert any object into the opening of the protec­tive shield surrounding the ignitor coil. Do not attempt to clean this area.
2. The burner flame should be 1/2" long when the air shutter is correctly adjusted. (See Figure 8.) The air shutter is located at the lower right of the access area, above the gas valve. To adjust the air shutter, loosen the lock screw. Move the air shutter to close the opening to decrease the air or enlarge the opening for more air. Tighten the lock screw when the adjustment is complete.
Figure 18
UPPER OVEN BURNER ADJUSTMENT - RST
The burner flames should be 3/8" long when the air shutter is correctly adjusted. The air shutter is located at the left side of the upper oven burner. To adjust the air shutter, loosen the lock screw. Move the air shutter to close the opening to decrease the air or enlarge the opening to increase the air. Tighten the lock screw when the adjust­ment is complete.
13 RC231002 Rev. 3
INSTALLATION INSTRUCTIONS
BROIL BURNER
Burner Adjustment
1. No gas input adjustment is necessary as the infrared burner is equipped with a fixed orifice. There is no air shutter to adjust.
2. An electric ignitor is used to light the burner. DO NOT attempt to insert any object into the openings of the protective shield surrounding the ignitor coil. Do not attempt to clean this area.
3. The burner may have a hazy or fuzzy appearance when in operation. This haze may be 3/8" thick maximum and is normal for this type of burner.
UPPER OVEN FLAME CHARACTERISTIC ADJUSTMENT
The appearance of a properly adjusted gas flame is one having an inner cone of bluish-green and an outer mantle of dark blue. The length of the inner cone flame will be about 3/8" when correctly adjusted. (See Figure 9.) Flame characteristics should be clean but soft.
PRESSURE REGULATOR (On Range)
Remove the cap marked "Nat" and reverse it to read "LP". Be sure not to disturb or remove the spring beneath the cap. Also make sure the fiber washer is between the cap and the body of the regulator. See Figure 10 for the correction position of the cap.
Remove the cap with the screwdriver slot and replace upside down. This plug will then have the marking "LPG10". Be sure not to disturb or remove the spring beneath this plug. See Figure 11 for correct position of plug.
Figure 20
OR
1. An electric ignitor is used to light the burner. DO NOT attempt to insert any object into the openings of the protective shield surrounding the ignitor coil. Do not attempt to clean this area.
2. Oven Burner Adjustment The burner flame should be 3/8" long when the air shutter is correctly adjusted. (See Figure 9).
The air shutter is located at the left side of the upper oven burner. To adjust the air shutter loosen the lock screw. Move the air shutter to close the opening to decrease the air or enlarge the opening to increase the air. Tighten the lock screw when the adjustment is complete.
Figure 19
LP CONVERSION
Figure 21
OR Remove the cap with the screwdriver slot. Remove the black insert marked "Nat" from the cap. (This is a tight fit in the cap.) Reverse this insert and carefully push it firmly into the hole in the cap. The marking "LP" will now be showing on the insert. Be sure the insert is pressed into the shoulder. Also, be sure not to disturb the spring in the body of the regulator.
Replace the cap in the body of the regulator and tighten. See Figure 12 for the correct position of the insert.
NATURAL TO LP GAS CONVERSION
FIRE OR EXPLOSIION HAZARD
THIS UNIVERSAL RANGE IS PREADJUSTED FOR OPERATION ON "NATURAL" GAS AS SHIPPED FROM THE FACTORY. TO USE THE APPLIANCE ON LP GAS, YOU MUST DO THE FOLLOWING:
RC231002 Rev. 3 14
Figure 22
Remove the cap with screwdriver slot. Carefully remove the spring and washer (washer will be at bottom of spring). Reverse so that washer is at top of spring and reinstall spring and washer.
INSTALLATION INSTRUCTIONS
Remove the cap in the body of the regulator, over the washer and spring, and tighten cap. See Figure 13 for the correct position of the washer and spring.
Figure 23
OR
Figure 24
FLAME APPEARANCE
The air shutter (see Figure 17) should be adjusted for a proper flame. Adjust the shutter so the flame has an inner cone of bluish-green and an outer mantle of dark blue. The flame should be soft in character.
NOTE: On LP gas a slight yellow tip will be visible on top burner flames, but will not affect burner performance.
MODELS WITH SEALED TOP BURNERS
NOTE: Sealed Top Burner Models with Serial Number
Date Codes F006 through F009 are for use on Natural Gas only and are not field convertible for use on LP gas.
TOP BURNER ADJUSTMENT (Below Serial Number F0430127550)
ORIFICES
Universal Models (Natural or LP) are shipped from the factory orificed for Natural Gas. IF THEY ARE TO BE USED ON LP GAS, the burner orifice spuds must be changed. They will be found wired to the inlet pipe behind the storage drawer. The proper orifice for use on Bottled (LP) Gas is red colored and stamped #68 (drill size). BE SURE to use proper burner spud for the gas in use. Rewire the Natural Gas orifice spuds to the inlet pipe for future conversion.
MODELS WITHOUT SEALED TOP BURNERS
TOP BURNER ADJUSTMENT
ORIFICES
Remove four (4) top burners by removing the mounting screws and lifting out of bracket. Then turn down the orifice hoods onto the pins being careful not to drive pin into the valve or to distort the hole through the center of the pin. Reinstall the top burners and mounting screws. (See Figure 15.)
FIGURE 25
Nat. Gas LP Gas
Burner Spud 54 68
(Red colored for identification)
TO CONVERT
Remove four (4) top burners by pulling upwards. (See Figure 26.) Remove the two (2) flat headed screws at each burner and lift off main top. Replace the burner orifice spuds using a 5/16" nut driver. Reinstall maintop and burners. To replace the burners, position the ignitor over the hole at the rear of each burner opening and push the burner down onto the burner base until the skirt contacts the maintop.
15 RC231002 Rev. 3
Figure 26
INSTALLATION INSTRUCTIONS
BURNER ADJUSTMENT
No gas input adjustment is necessary as the burner are equipped with fixed orifices. There are no shutters to adjust. NOTE: On LP gas a slight yellow tip will be visible on top burner flames, but will not affect burner perfor­mance.
OR
TOP BURNER ADJUSTMENT (Above Serial Number F0430127550)
TO CONVERT
Lift off four (4) burner caps. (See Figure 27.) Remove one (1) screw at each burner body. Pull each burner body upwards and disconnect the ignition wire at the electrode. Mark wires for identification on reassembly. Remove one (1) flat headed screw at each burner and lift off main top.
Remove plenum box covers (when equipped). Remove two (2) screws from each venturi mounting bracket and remove venturi assemblies.
Turn the orifice hoods onto the pins. The orifices should be turned snug onto the pins careful not to drive pin into the valve or distort the hole through the center of the pin. Reinstall the burner bodies and caps.
Remove one (1) flat headed screw at each burner and lift off main top. Remove plenum box covers. Remove two (2) screws from each venturi mounting bracket and remove venturi assem­blies.
Turn the orifice hoods onto the pins. The orifice should be turned snug onto the pins careful not to drive pin into the valve or distort the hole through the center of the pin. Reinstall the burner bodies and caps.
The air shutters should be adjusted for a proper flame. Adjust the air shutter so that the flame has an inner cone of bluish-green and an outer mantle of dark blue. The flame should be soft in character. To adjust the air shutter, loosen the lock screw. Move the air shutter to close the opening to decrease the air or enlarge the opening for more air. Tighten the lock screw when the adjustment is com­plete. Reinstall the plenum box covers, main top and main top burners in reverse order of removal. NOTE: On LP
gas a slight yellow tip will be visible on top burner flames, but will not affect burner performance.
The air shutters should be adjusted for a proper flame. Adjust the air shutter so that the flame has an inner cone of bluish-green and an outer mantle of dark blue. The flame should be soft in character. To adjust the air shutter, loosen the lock screw. Move the air shutter to close the opening to decrease the air or enlarge the opening for more air. Tighten the lock screw when the adjustment is com­plete. Reinstall the plenum box covers, main top and main top burners in reverse order of removal. NOTE: On LP
gas a slight yellow tip will be visible on top burner flames, but will not affect burner performance.
Figure 27
MODELS WITH CAST BURNERS
TO CONVERT
Lift off four (4) burner caps. (See Figure 28.) Remove one (1) screw at each burner body. Pull each burner body upwards and disconnect the ignition wire at the electrode.
RC231002 Rev. 3 16
Figure 28
OVEN BURNER (Upper and Lower Oven) (RST)
ORIFICES
Turn down the orifice hood onto the pin. The orifice should be turned snug onto the pin being careful not to drive pin into the valve or to distort the hole through the center of the pin.
LOWER OVEN FLAME CHARACTERISTIC ADJUSTMENT
The appearance of a properly adjusted oven burner flame is a bluish-green inner cone and a dark blue mantle. The flame characteristics should be clean and soft with no yellow tips. Blowing or lifting of the flame should not occur. The burner flame should be 1/2" long when the air shutter is correctly adjusted. (See Figure 18.)
An electric ignitor is used to light the burner. DO NOT attempt to insert any object into the openings of the protective shield surrounding the ignitor coil. Do not attempt to clean this area.
INSTALLATION INSTRUCTIONS
found under the plate in the center of the burner box. BE SURE to use the proper burner spud for the gas in use.
Reinsert Nat. Gas orifice in burner box with louvers facing to rear of unit.
Nat. Gas LP Gas
Burner Spud 50 58
(Silver colored for identi-
Figure 29
fication)
The air shutter is located in the lower access area. To adjust the air shutter, loosen the lock screw. Move the air shutter to close the opening to decrease the air or enlarge the opening for more air. Tighten the lock screw when the adjustment is complete.
OVEN BURNER (RSS)
1. Orifices Turn down the orifice hood onto the pin. The orifice should be turned snug onto the pin being careful not to drive pin into the valve or to distort the hole through the center of the pin.
2. Low Oven Flame Characteristic Adjustment
a. The appearance of a properly adjusted oven burner flame is a bluish-green inner cone and a dark blue mantle. The flame characteristics should be clean and soft with no yellow tips. Blowing or lifting of the flame should not occur. The burner flame should be 1/2" long when the air shutter is correctly adjusted.
b. An electric ignitor is used to light the burner. DO NOT attempt to insert any object into the openings of the protective shield surrounding the ignitor. Do not attempt to clean this area.
MODELS WITH SEALED TOP BURNERS
Universal models (Nat. or LP) are shipped from the factory orificed for Nat. Gas. IF THEY ARE TO BE USED ON LP GAS, the burner orifice spud must be changed. This will be found wired to the inlet pipe behind the storage drawer. The proper orifice for use on Bottled (LP) gas is silver colored (Nickel plated) and stamped #58 (drill size). BE SURE to use the proper burner spud for the gas in use. Rewire the Natural Gas orifice spuds to the inlet pipe for future conversion.
TO CONVERT
Remove oven door and storage drawer. Shut off valve on gas line that runs from the pressure regulator to the gas valve.
Remove the two (2) screws fastening the broiler burner to the oven tank at front of burner. Remove the burner by pulling front end down to expose the burner orifice spud in the rear wall. Be careful not to break the ignitor. Lay the burner aside carefully with the screen side up. Replace the burner orifice spud using a 5/16" nut driver. Reverse the procedure to reinstall the burner.
BURNER ADJUSTMENT
c. The air shutter is located in the lower accessed area. To adjust the air shutter, loosen the lock screw. Move the air shutter to close the opening to decrease the air shutter to close the opening to decrease the air or enlarge the opening for more air. Tighten the lock screw when the adjustment is complete.
ULTRA-RAY® BROILER BURNER
An electric ignitor is used to light the burner. DO NOT attempt to insert any object into the openings of the protective shield surrounding the ignitor element. Do not attempt to clean this area.
MODELS WITHOUT SEALED TOP BURNERS
Universal models (Nat or LP) are shipped from the factory orifices for Nat gas. IF THEY ARE TO BE USED ON LP GAS, the burner orifice spud must be changed. This will be
17 RC231002 Rev. 3
No gas input adjustment is necessary as the infrared burner is equipped with a fixed orifice. There is no shutter to adjust.
The burner may have a hazy or fuzzy appearance when in operation. This haze may be 3/8" thick, maximum and is normal for this type of burner.
RANGE FEATURE CHECKOUT
Check all range features, including lights, clocks, etc. for proper operation.
INSTALLATION INSTRUCTIONS
CHECKOUT PROCEDURE OF CLEAN CYCLE OPERATION - RSS (WITH MECHANICAL TIMER; FOR OTHER MODELS FOLLOW TIMER INSTRUCTIONS)
REMOVE OVEN RACKS, BROILER PAN AND GRID.
MAINTENANCE INSTRUCTIONS
1. Keep appliance clear and free from combustible materials, gasoline, cleaning fluids, and other flam­mable vapors and liquids.
A. Set the range clock to the correct time of day. (If not
set properly).
B. Push the turn the start dial on the backguard to the
approximate time of day until set stem pops out.
C. To establish length of clean time, turn the stop dial 1
1/2 hours to 2 hours ahead of start time. On electronic clock models push clean button on timer for 3-hour clean time.
D. Close and latch oven door, moving the latch arm to
the far right. (clean position).
E. Turn the oven heat control, on control panel, clock-
wise to "CLEAN" position. Then, turn selector switch to the "CLEAN" setting.
F. A 15-20 second delay should occur, and the oven
indicator light should then come on.
G. After the cycle begins, the oven should reach a
temperature in excess of normal broiling (approxi­mately 700°). The "CLEAN" indicator light should come on, and the terminal lock system should lock and secure the oven door.
H. Turn selector switch from "CLEAN" to "OFF" and heat
control to "OFF".
I. When oven temperature has lowered to approxi-
mately 700° or less, the lock system should unlock the oven door allowing the latch handle to move freely.
2. Gas burners need sufficient air to operate. Objects should not be placed in front of or on maintop rear of range while in use. This could obstruct the air flow needed for combustion and vent for flue products.
BURNER CLEANING -
The burner heads are made of aluminum and should not be subjected to scouring or abrasive pads. Never not be subjected to scouring or abrasive pads. Never use steel wool or oven cleaners on the burner heads or they will dull and not regain their original luster.
To clean the burners, remove the burner grates and push the main top towards the rear of the range until the front tabs are free. Then raise the main top and remove or engage the main top support. This will support the main top while the burners are removed for cleaning.
Before attempting to remove the burners, be certain the four (4) burner mounting screws which retain the burners to the burner supports are removed. If the screws are still secured, they can be removed with a Phillips screwdriver.
To remove the burners, release the burner head brackets from the burner support, lift up and pull towards the rear of the range.
To replace the burners slip the Venturi (long, thin end) over the burner orifice and then position the burner locating brackets into the burner support channel. Reinstall the burner mounting screws.
DEFECTS
Any defects or faulty or damaged parts must be reported immediately and steps taken to correct them through normal dealer service channels.
POWER FAILURE
In the event of a power failure, safe manual lighting of the top burners is possible. To do this, hold a lighted match at the desired burner head (the part projecting above the main top), turn the top burner control knob to the light position.
The flame height can now be adjusted to the desired size. The broil and oven burners cannot be operated during a power failure and no attempt should be made to do so.
RC231002 Rev. 3 18
Wiping the burners following each use will remove spillover deposits and grease spatters before these soils get a chance to harden on the surface. Burnt soil can be cleaned by soaking the burners in warm water and a dishwashing liquid detergent such as "Dove" or "Lux". A dishcloth or nonabrasive pad (such as Dobie pad) should be used to rub the burner caps after the soaking period. Be sure the burners are dry, as water lodged in the burner parts might cause an uneven flame or interfere with automatic lighting.
If stains still remain after soaking, you can soak any heavily soiled burners in a solution of two tablespoons of "Dip-it" per quart of water. Use a large pan and enough water so the cap and base part of the burner assembly can be completely immersed; bring water to a boil, remove vessel from burner, and add measured amount of "Dip-it". Im­merse the burner in the hot solution and soak for 20
INSTALLATION INSTRUCTIONS
minutes, no longer. Be sure the liquid completely covers the cap and base portion of the assembly. After 20 minutes, remove burner, cool slightly and rinse thoroughly with cold water. Be sure hands are protected to prevent burns from hot water. Be sure all the solution is completely rinsed off both the inside and outside of the burner. If some stains still remain, rub with a "Dobie" pad.
The burner may then be left to dry at room temperature or be placed in the oven at 170° for 1/2 hour. BE SURE TO
PROTECT YOUR HANDS WHEN REMOVING DRIED BURNERS FORM THE OVEN.
Figure 31
NOTE: These thermostats (Robertshaw) have a cement coating over the adjusting screw. Evidence of attempts to adjust these thermostat nullifies the warranty.
UNIVERSAL GAS ORIFICES
With the exception of the Broiler Burner and Sealed Top Burner, orifices for these models are of the coaxial type. They contain a double coaxial orifice hood and universal pin. The hood orifice is sized for Natural Gas (6 inches water column pressure). The pin orifice is sized for LP Gas (11 inches water column pressure).
The orifice is adjusted for Natural gas as shipped from the factory. It must be adjusted for use on LP gas. This requires that the orifice hood be screwed or turned down approximately two (2) turns onto the pin. The hood should be turned down snug but not tight to the point where it damages or distorts the pin. (See Figure 19.)
When set up for Natural Gas, gas flows around the pin and through the orifice of the hood which is sized for Natural Gas. When the hood is screwed down for LP gas, the gas flow is only through the hollow pin which is sized for LP gas.
For Thermostat Calibration on models with the Elec­tronic Range Control (ERC), see section on ERC Operating and Testing Procedures.
When making any temperature adjustments, a reliable test instrument should be used to accurately determine the oven temperature.
A reliable test instrument of the thermocouple type is preferred which will allow temperature readings with the door closed.
Position the thermocouple clip of the test instrument on the center of the oven rack that is positioned in the center of the oven cavity. The thermocouple of the test instrument should be "weighted" or "loaded" in order to represent more closely the average cooking temperature of the oven versus the on-off cycling of the thermostat with the full rate gas valve. The procedure for loading a thermocouple is illustrated in Figure 20.
Figure 30 - Universal Orifice
OVEN THERMOSTAT KNOB ADJUSTMENT
Models without electronic Range Control (ERC)
Cooking recipes are written to take into consideration that oven thermostats have manufacturing tolerances, and may not provide an average temperature exactly on the thermostat setting. If the temperature average reading is beyond the ±25° tolerance range, a limited adjustment can be made with the adjustable skirt on the knob. The adjusting screw on the thermostat is sealed and no adjust­ment can or should be attempted. The rear of the adjust­able skirt shown here is self-explanatory.
19 RC231002 Rev. 3
Figure 32 - "Loading" A Thermocouple
An 8 1/2 x 11-inch piece of aluminum foil should be folded five (5) times, doubling the thickness with each fold. After the fifth fold, place the thermocouple in the center of the aluminum piece as shown and fold once more. Finally, fold the sides so the foil clings to the thermocouple. The loaded thermocouple will then provide temperature readings on the thermometer that more closely resemble the mean or average temperature of the oven as it cycles on and off above and below the temperature setting.
With all the controls properly set for "Bake", turn the oven thermostat to 350°.
INSTALLATION INSTRUCTIONS
After the oven has cycled for 25 to 30 minutes, note the temperature that the oven cycles ON and OFF. For example, at 350° setting the oven cycles between 335° and 355°. This provides a mean or average temperature of 345°F., well within the ±25°F specification.
GAS PRESSURE
Correct ignition and operation of the burners are dependent upon adequate gas pressure. The regulator is designed to provide pressure of approximately six (6) inches water column pressure (WCP) for natural gas and approximately eleven (11) inches for WCP for liquid propane (LP) gas, provided the universal type gas regulator and gas valves have been correctly set up for the type gas employed.
These pressures therefore require that the minimum supply pressure to the regulator must be at least six (6) inches WCP for natural gas and eleven (11) inches WCP for LP gas, with maximum pressure not to exceed fourteen (14) inches WCP.
MEASURING GAS PRESSURE
Equipment for measurement of gas pressure varies from pressure meters and gauges to the relatively simply and most commonly used manometer. If it is used, follow the directions supplied with the unit. The following informations covers the use of a manometer.
zero level.
Figure 33 - The Mannometer
A manometer is simply a U-shaped tube of clear plastic or glass (see illustration). A scale in inches is located between the two (2) legs of the "U". In use, the tube is filled with sufficient water to achieve a level at "0" inches. One end of the tube is connected to the range manifold or gas valve orifice while the other end of the tube or leg is open. When gas pressure is applied, the water on the gas side of the tube is pushed down and the water in the other leg rises up against the atmospheric pressure on the open end. The sum of the readings below the zero level and above the level will provide the gas pressure in inches water column, or the water column height which the gas pressure will support against the atmospheric pressure on top of the water column. The manometer therefore indicates gas pressure in inches water column. This conforms with the gas specifications for gas appliances which are given as inches WCP or inches water column pressure.
USING THE MANOMETER
The usual procedure for taking the pressure reading is to connect the tubing to one of the gas valve orifice hoods and turn on the valve. A full load reading should be taken by turning on all of the top burners and the oven burner to assure that the pressure under a full load is adequate. Figure 33 shows four (4) inches water column pressure (WCP), two (2) inches above and two (2) inches below the
RC231002 Rev. 3 20
SAFE OPERATING PROCEDURES
SAFETY PRECAUTIONS READ BEFORE OPERATING THE RANGE.
are easily hit. UTENSIL HANDLES SHOULD BE TURNED INWARD AND NOT EXTEND OVER AD­JACENT SURFACE BURNERS to minimize burns, ignition of flammable materials, and spillage due to unintentional contact with the utensil.
Accidents are always tragic, especially because so many of them could have been prevented with a little care and judgement. Here are some basic good practices to follow for safe use of the gas range.
1. Be sure the range is installed by a qualified technician and is properly grounded.
2. Never use the range for warming or heating the room. This warning is based on safety considerations.
3. Wear proper apparel - loose fitting or hanging garments should never be worn when operating the range.
4. Do not repair or replace any part unless specifically recommended in the manual. All other servicing should be referred to a qualified service technician.
5. Flammable materials should not be stored near the range.
6. Do not use water on grease fires. Smother fire or flame or use dry chemical (such as baking soda) or foam type extinguisher.
7. Use only dry potholders. Moist or damp potholders on hot surfaces may result in burns from steam. Do not use a towel or other bulky cloth.
8. Children should not be left alone or unattended in area when the range is in use. They should never be allowed to sit or stand on any part of the range.
9. Select utensils large enough to properly contain food and avoid boil-overs or spillovers. This will both save cleaning and prevent hazardous accumulations of food, since heavy splattering or spillovers left on a range can ignite. Pan size is especially important in deep-fat frying.
12. Never leave range burners at high heat settings. Boil­over causes smoking and greasy spillovers that may ignite.
13. Clean range with caution. If a wet sponge or cloth is used to wipe spills on a hot cooking area, be careful to avoid steam burns. Some cleansers can produce noxious fumes if applied to hot surfaces.
14. Do not touch surface area near burner units and burner caps. During and after use, these areas may be hot enough to cause burns. Avoid contact with these areas by clothing or other flammable materials until they have had sufficient time to cool.
15. Do not heat unopened food containers - build-up of pressure may cause container to burst and result in injury.
16. Do not store items of interest to children in cabinets above the range. Children climbing on the range to reach items could be seriously in­jured.
17. GREASE - Grease is flammable and should be handled carefully. Never leave any cooking opera­tion unattended. Let fat cool before attempting to handle it. Wipe spillovers immediately.
18. Burner flame should be adjusted so that they do not extend beyond the edge of the utensil. This warning is based on safety considerations.
19. Never sit, step, or stand on any part of the range or injury may result.
10. TYPE OF UTENSILS - Avoid pans that are unstable and easily tipped. In choosing pans, look for easily grasped handles that will stay cool. Pans that are too heavy when filled with food can also be a hazard. If pan handles twist and cannot be tightened, discard the pan.
11. HANDLES - Always turn pan handles to the side or back of the range - not out into the room where they
21 RC231002 Rev. 3
SAFE OPERATING PROCEDURES
OPERATING INSTRUCTIONS
SAFETY TIPS
Some "common sense" rules to remember:
· Always be certain that the oven parts are cool before touching them when hands are not protected by a potholder.
· Always use a dry potholder, never a moist one, nor a trailing cloth, to avoid possible burns from steam.
· Pulling out oven racks is a convenience when lifting heavy foods, but caution should be used against possible burns from touching hot surface.
· For your safety, never use the range as a space heater.
· Do not heat unopened containers such as jars, cans, etc., in the oven. The build-up of pressure may cause the container to burst and can cause serious personal harm or damage the range.
· Do not use aluminum foil on the racks or oven bottom. This will hinder heat circulation.
· Do not use aluminum foil on the racks or oven bottom when cleaning. The self-cleaning feature makes this unnecessary.
· Do not attempt to clean the oven or broiler burner ignitor assembly. The ignitors are electrically oper­ated and the danger of electric shock is present.
· Do not place baking utensils directly on the oven bottom.
· Do not use disposable or substitute broiler pans. The broiler pan and grid provided with the range have been scientifically designed to keep drippings cool so they will not become hot enough to ignite.
· Always remove the broiler pan and grid from the oven when baking and roasting. A possible fire hazard could exist if a soiled pan and grid are left in the oven. Also, any drippings on the grid will become baked on and will be very difficult to remove.
· Never cover the broiler grid with aluminum foil. It may trap grease and cause it to smoke. If desired, place a sheet of aluminum foil to line the broiler pan underneath the broiler grid to ease clean up. (A cup of water placed in the broiler pan will also minimize clean up.)
· Never use the range as storage space.
· Never store flammable items in the storage drawer.
all broiling is done with a fast, searing heat, no temperature selection is used except with certain recipes). The burner lights automatically in 50 - 60 seconds. During the broil cycle the burner will cycle on and off. For programming information on models with the Electronic Range Control, see Section III, Operation and Troubleshooting, ERC Control.
Things to Remember:
CLOSE THE DOOR COMPLETELY FOR ALL BROILING.
Ultra-Ray® consumes most smoke and spatter. Kitchen stays cleaner, cooler.
DO NOT PRE-HEAT THE BROILER BEFORE USING.
BAKING
For best results preheat the oven first. Turn the selector dial to "Manual" and the thermostat dial to the desired temperature. The oven will light automatically. Allow the oven to heat to temperature, approximately fifteen (15) minutes. For programming information on models with the Electronic Range Control, see Section III, Operation and Troubleshooting, ERC Control.
The range is equipped with tilt proof oven racks with automatic stops. The oven racks are removable and can be inserted at various levels. They can be pulled to the "STOP" position without danger of tipping. To remove the racks, pull to the stop position, raise the forward edge, and lift. Reverse the procedure to install racks. One or both oven racks can be used during baking.
Always keep in mind that heated air in the oven must be allowed to circulate freely. Leave at least 1 1/2" between utensils and between utensils and the oven walls. For example, never place one cake layer directly over another
- stagger them within the oven.
BROILING
The Ultra-Ray® Broiler
To use the Ultra-Ray® broiler, set the selector dial to "Manual" and the temperature control dial to "Broil" (since
RC231002 Rev. 3 22
FIGURE 34
SAFE OPERATING PROCEDURES
OPERATING THE TOP BURNERS
MODELS WITHOUT SEALED BURNERS
The top burners of some models are equipped with Tri-Set top burner valves. These valves provide flame adjustment for any size flame which is desired as well as "click" positions for "LO", "MED", and "HI" settings. Depress the knob and turn the knob counterclockwise as far as it will go. When the burner lights, turn the knob back to the desired flame height.
The "HI" position provides a flame which will bring water to a full boil quickly. This is the "full on" position of the valve.
If the burner flame is turned down, an audible "click" can be heard as the valve reaches the "MEDIUM" position. This flame is sufficient to keep water boiling in a covered pan.
When the flame is turned down lower, a second "click" can be heard. This is a very low or "Keep Warm" flame setting which is the "LO" position on the valve. The low flame provides a warming heat to keep food which is already cooked ready to serve.
The "HI" position provides a flame which will bring water to a full boil quickly. This is the "full on" position of the valve.
If the burner flame is turned down, an audible "click" can be heard as the valve reaches the "MEDIUM" position. This flame is sufficient to keep water boiling in a covered pan.
When the flame is turned down lower, a second "click" can be heard. This is a very low or "Keep Warm" flame setting which is the "LO" position on the valve. The low flame provides a warming heat to keep food which is already cooked ready to serve.
The low burner flame may be adjusted by turning adjust­ment screw in center of valve stem. Normally, the low flame should be adjusted to the minimum steady blue flame. Check the adjustment by turning from high to low several times to see that the burner does not go out. NOTE: When adjusting the low burner flame, the valve stem should be held in the "LOW" position.
The Tri-Set valves are equipped with metered, fixed orifices, and the low setting cannot be adjusted. As there are air shutters, the burner flames can be adjusted in accordance with the Adjustment and Calibration Instruc­tions.
The HI-LOW valves on other models are similar but without the "click" stops.
TOP BURNERS
The top burners consists of a burner and integral cap, a flash tube and support, a gas delivery tube including venturi and an adjustment air shutter. These burners are designed for trouble free operation with a minimum of parts.
MODELS WITH SEALED BURNERS
The top burners of these models are equipped with Tri-Set top burner valves. These valves provide flame adjustment for any size flame which is desired as well as "click" positions for "LO", "MED", and "HI" settings.
Whenever a top burner gas valve knob is depressed and turned fully counterclockwise, the electrode built into the burner cap will start sparking and continue as long as the knob is held in this position. After the burner lights, move the knob to the "HI" position of the valve. At this time the sparking will cease. There are no standing pilots that have to be lighted or adjusted.
23 RC231002 Rev. 3
OPERATION AND SERVICE PROCEDURES
(SLIDE IN MODELS)
ELECTRONIC CLOCK/TIMER
The Clock/Timer offers a time-of-day clock with a PM designation, a Minute Timer with up to nine (9) hours and fifty-nine (59) minutes, and cook and stop functions. The clock and timer are set up with up and down variable speed "slew" entry.
The display board consists of a vacuum fluorescent display (VFD) with pushbutton entry. There are six (6) pushbuttons: "MINUTE TIMER", "COOK/CLEAN TIME", "STOP TIME", "UP" and "DOWN" and "CANCEL/CLOCK". The "UP" and "DOWN" pushbuttons are for time setting.
Figure 56 - Electronic Clock/Timer
The Clock/Timer is a digital clock with a minute timer and automatic control cooking cycle. The clock is set via the function setting and slew controls. When power is con­nected to the unit, or a power failure of longer than three (3) seconds occur, the display will show "12:00" flashing at the rate of 1/2 second ON and 1/2 second OFF.
Setting the Time-of-Day
To Set the Minute Timer:
1. Display the "MINUTE TIMER" button. The timer will display "0:00".
2. Press the "UP" button until the desired time period is displayed, and release the "UP" button.
The minute timer is now programmed. After approxi­mately five (5) seconds the timer display will revert back to the Time-of-Day while continuing to count down the programmed time. An alarm will sound when the timer reaches "0:00". Press the "MINUTE TIMER" button to silence the alarm. To check the remaining time in the program, simply press the "MINUTE TIMER" button.
The Minute Timer can also be used when the Clock/ Timer is programmed for a Timed Bake or Self-Clean operation. NOTE: The Minute Timer does not control oven operation.
SETTING TIMER FOR TIMED BAKE (Bake Cycle Only)
SEMI-AUTOMATIC OPERATION
Oven starts at once and shuts off at the end of the cooking cycles.
The clock setting is achieved by depressing the "CANCEL/ CLOCK" pushbutton first. Then key in the desired time of day by using the "UP" and "DOWN" pushbutton keys. The clock has a PM designation on the VFD for the PM time setting.
The Clock/Timer also incorporates military timing capabili­ties. In order to change from the standard AM/PM clock operation to military time clock operation or vice versa, simultaneously press "COOK/CLEAN TIME" button and the "STOP TIME" button. NOTE: The "UP" and "DOWN" buttons must be pressed within five (5) seconds after selecting or pressing any timing function button ("CAN­CEL/CLOCK", "MINUTE TIMER", "COOK/CLEAN TIME", "STOP TIME"). If the "UP" and "DOWN" buttons are not pressed within the five (5) second period, incorrect or no programming will occur.
Setting the Minute Timer
The minute timer can be used for precisely time baking or broiling operations in the oven. It can be used for timing from one (1) minute up to nine (9) hours and fifty-nine (59) minutes.
1. Turn selector switch knob to "AUTO".
2. Turn oven control knob to the desired baking tem­perature.
3. Press the "STOP TIME" button. The display will show "0:00".
4. Press the "UP" button to set the desired stop time, and then release the "UP" button. After approximately five (5) seconds, the display reverts back to the Time­of-Day, "AUTO" appears on the left of the display along with the oven indicator in the center of the display signifying that the timed bake cooking cycle has started. When the desired stop time is reached, the oven indicator light goes out and an alarm will sound for approximately ten (10) seconds. The oven will automatically shut off. "AUTO" will continue to blink ON and OFF indicating that the clock timer was set for an automatic timed function and is completed.
5. Turn the selector switch to "MANUAL", oven control to the OFF position and press the "CANCEL/CLOCK" button.
RC231002 Rev. 3 24
OPERATION AND SERVICE PROCEDURES
(SLIDE IN MODELS)
DELAYED TIME BAKE
Oven starts at a later time and shuts off at the end of the cooking cycle.
1. Turn selector switch knob to "AUTO".
2. Turn oven control knob to the desired baking tem­perature.
3. Press "COOK/CLEAN TIME" button. The display will show "0:00".
4. Press the "UP" button to set the desired length of baking time. EXAMPLE: To time bake for three (3) hours press and hold the "UP" button until "3:00" appears on the display, then release the UP button.
5. Press the "STOP TIME" button.
6. Press the "UP" button to set the desired stop time. To have the time bake cycle finish at five o-clock (5:00), press and hold the "UP" button until "5:00" appears on the display, then release the "UP" button. After approximately five (5) seconds, the display reverts back to the Time-of-Day and "AUTO" appears on the left of the display indicating that the Clock/Timer is programmed for an automatic timed function. The clock will automatically calculate the start time. When the starting time is reached, the oven indicator in the center of the display will come on indicating that the timed bake cycle has started.
When the stop time is reached, the oven indicator turns off and an alarm will sound for approximately ten (10) seconds. The oven will automatically turn off and AUTO will continue to blink ON and OFF indicat­ing that the Clock/Timer was set for an automatic timed mode and it is completed.
7. Turn the selector switch to "MANUAL", the oven control to the OFF position, and press the "CANCEL/ CLOCK" button.
SETTING THE TIME FOR SELF-CLEAN
4. Press the "COOK/CLEAN TIME" button. The display will show "0:00".
5. Press the "UP" button to set the desired length of the clean time. EXAMPLE: To self-clean the oven for three (3) hours, press and hold the UP button until "3:00" appears on the display, then release the "UP" button.
After approximately five (5) seconds, the display reverts back to the Time-of-Day and "AUTO" appears on the left of the display along with the oven indicator in the center of the display signifying that the clean cycle has started.
The oven indicator light on the control panel will come on and cycle ON and OFF with the thermostat.
6. At the end of the clean cycle the oven indicator light and oven indicator (clock) will turn OFF, and an alarm will sound for approximately ten (10) seconds. The oven will automatically turn off and "AUTO" will continue to blink ON and OFF indicating that the Clock/Timer was set for an automatic timed mode and it is now completed.
7. Turn the selector switch to "MANUAL", the oven control to "OFF" and press the "CLOCK/CANCEL" button.
8. The oven door can be opened approximately 30 minutes after the completion of the clean cycle. Do not attempt to open the oven door latch until approxi­mately thirty (30) minutes have elapsed, otherwise the door lock mechanism may be damaged.
If the door will not open, wait five (5) minutes and try again.
TO START SELF-CLEAN LATER:
1. Turn the selector switch knob to the "AUTO" position.
2. Turn the oven control counterclockwise until it stops ("CLEAN" - turn to "STOP" position).
TO START SELF-CLEAN NOW:
1. Turn the Selector switch knob to the "AUTO" position.
2. Turn the oven control counterclockwise until it stops ("CLEAN - TURN TO STOP" position).
3. Move the latch lever to the right hand (self-clean) position. The clean indicator will now come on.
25 RC231002 Rev. 3
3. Move the latch lever to the right hand ("SELF-CLEAN") position. The clean indicator will now come on.
4. Press the "COOK/CLEAN" button.
5. Press the "UP" button to set the length of time desired to self-clean the oven. For example, to self-clean up to three (3) hours, press and hold the "UP" button until "3:00" appears on the display, then release the "UP" button.
OPERATION AND SERVICE PROCEDURES
(SLIDE IN MODELS)
TO AVOID THE RISK OF ELECTRIC SHOCK, PERSONAL INJURY OR DEATH DISCONNECT POWER BEFORE SERVICING, UNLESS TESTING REQUIRES IT.
6. Press the "STOP TIME" button.
7. Press the "UP" button to set the desired stop time of the self-clean cycle. For example, to have the self­clean end at 4 o'clock, press and hold the "UP" button until "4:00" appears on the display, then release the "UP" button. After approximately five (5) seconds, the display will revert back to the Time-of-Day and "AUTO" will appear on the left of the display indicating the "CLOCK/TIMER" is programmed for an auto­matic timed operation. The clock will automatically calculate the start time of the self-clean cycle. In other words, a three (3) hour self-clean cycle would begin at one (1) o'clock and end at four (4) o'clock.
When the start time of the self-clean cycle is reached, the oven indicator in the center of the display will come on and the clean cycle will begin.
The oven indicator light on the control panel will come on and cycle ON and OFF with the thermostat. When the stop time is reached, the oven indicator turns off and an alarm will sound for approximately ten (10) seconds. The oven will automatically turn off and "AUTO" will continue to blink on and off indicating the Clock/Timer was set for an automatic timed mode and it is not completed.
8. After the clean cycle turn the selector switch to "MANUAL", the oven control to "OFF", and press the "CLOCK/CANCEL" button.
9. The oven door can be opened approximately thirty (30) minutes after the completion of the clean cycle. Do not attempt to open the oven door latch until approximately thirty (30) minutes have elapsed, oth­erwise the door lock mechanism may be damaged. DO NOT FORCE THE LATCH HANDLE.
If the oven door will not open, wait five (5) minutes and try again.
CLOCK/TIMER TESTING PROCEDURES
P.C. BOARD TESTING - NO POWER TO UNIT
3. Attach the ohmmeter leads to the P.C. board L1 (TB1) and N (TB2) terminals. A resistance reading of approximately one hundred (100) ohms should be indicated. If zero (0) or infinite ohms is indicated, the P.C. board must be replaced.
4. Attach one (1) meter lead to the transformer ground terminal and the other meter lead to the L1 (TB1) terminal. Infinite ohms should be indicated. If zero (0) or a low ohms reading is indicated, replace the P.C. board.
5. Remove the meter lead from the L1 (TB1) terminal and attach it to the N (TB2) terminal. Infinite ohms should again be indicated. If zero (0) or a low ohms reading is indicated, replace the P.C. board.
6. Attach the ohmmeter leads to the K1 relay contact terminals TB4 and TB5. An infinite ohms reading should be indicated. If a zero (0) or a low ohms reading is indicated, replace the P.C. board.
7. Attach the ohmmeter leads to the K1 relay contact terminals TB6 and TB7. Infinite ohms should be indicated. If a zero (0) or low ohms reading is indicated, replace the P.C. board.
8. Set the ohmmeter to the RX1 ohms scale and zero the meter. Attach the meter leads to pins two (2) and fourteen (14) at the P.C. board J2 20 pin plug block. A resistance reading of approximately two (2) to three (3) ohms should be indicated. If an infinite ohms reading is indicated, replace the P.C. board.
K1 RELAY CONTACT TESTING
1. Shut off power to the range.
2. Remove the wire leads from the P.C. board terminals TB4, TB5, TB6, and TB7. Wrap the wire lead terminal ends with electrical tape to reduce the possibility of electrical shock or a short circuit to the range.
3. Set an ohmmeter to the RX1 scale and connect the meter leads to P.C. board terminals TB4 and TB5.
1. Shut off power to the range and remove the P.C. board.
2. Set ohmmeter to RX10 scale.
RC231002 Rev. 3 26
4. Turn on the power to the range and set the clock for the correct time of day. Contact TB4 - TB5 should be open (infinite ohms).
OPERATION AND SERVICE PROCEDURES
(SLIDE IN MODELS)
TO AVOID THE RISK OF ELECTRIC SHOCK, PERSONAL INJURY OR DEATH DISCONNECT POWER BEFORE SERVICING, UNLESS TESTING REQUIRES IT.
Figure 57 - Clock/Timer P.C. Board
5. Set the Cook/Clean time for one (1) minute by press­ing the "COOK/CLEAN TIME" button ("0:00" will be displayed) and then pressing the "UP" button one time ("0:01" should be displayed). After a short delay the TB4 - TB5 contact should close (zero ohms), "AUTO" and the oven indicator symbol should appear on the left and center of the display, and the Time-of­Day will appear on the digital display. When the one (1) minute Cook/Clean time elapses, the TB4 - TB5 contact should open (infinite ohms), an alarm will sound for approximately ten (10) seconds and the oven indicator symbol in the center of the display will turn off. "AUTO" will continue to blink ON and OFF to indicate that the Clock/Timer was programmed for a timed operation. Press the "CANCEL/CLOCK" button to turn off the blinking "AUTO" display.
6. Press the "STOP TIME" button and enter the stop time for two (2) minutes past the time of day. EX- AMPLE: Set the Time-of-Day to 12:00.
Press the "STOP TIME" button (the display will continue to show the Time-of-Day), then press the "UP" button until "12:02" is displayed.
After a short delay, contact TB4 - TB5 should close (continuity) and the display will show the Time-of-Day
along with the oven indicator in the center of the display and "AUTO" on the left of the display.
When the stop time is reached, the TB4 - TB5 contact should open (infinite ohms), the oven indicator in the center of the display turns off, and an alarm will sound approximately ten (10) seconds. "AUTO" will con­tinue to flash ON and OFF to designate that the Clock/ Timer was programmed for a timing function. Press the "CANCEL/CLOCK" button to turn off the flashing "AUTO" display.
7. Connnect the ohmmeter leads to terminals TB6 and TB7 and repeat Steps 4 - 6 to test the other K1 relay contact.
CLOCK P.C. BOARD VOLTAGE TESTS
Extreme caution must be taken when performing any live voltage tests to avoid the possibility of electrical shock or damage to the range components and/or testing equip­ment.
1. Shut off power to the range and disconnect the wire leads from the P.C. board terminals L1 (TB1) and N (TB2) to check the input voltage. Using a voltmeter
27 RC231002 Rev. 3
OPERATION AND SERVICE PROCEDURES
(SLIDE IN MODELS)
TO AVOID THE RISK OF ELECTRIC SHOCK, PERSONAL INJURY OR DEATH DISCONNECT POWER BEFORE SERVICING, UNLESS TESTING REQUIRES IT.
set to read 120 VAC or higher, attach the meter leads to the L1 and N wire leads and turn on power to the range. A voltage reading of approximately 120 VAC should be indicated. If no voltage is indicated, check the range wiring. If 120 VAC is indicated shut off power to the range and reconnect L1 and N wire leads to the P.C. board terminals.
2. Disconnect the 20 pin ribbon cable connector from the P.C. board J2 connector and turn on the power to the range. Check for voltages at the following pins at the J2 connector. (See Figure 28.)
PINS VOLTAGE
2-18 -25 to -35 VDC 6-18 -7 to -9 VDC
8-18 -7 to -9 VDC 10-18 -7 to -9 VDC 14-18 -25 to -35 VDC 15-18 -25 to -35 VDC
2-14 2.0 to 3.6 VDC
DISPLAY BOARD TESTING
Shut off power to the range and remove the display board from the control panel (refer to Disassembly Procedures). The function switches and diodes on the display board can be checked at the J1 connector. Install the clock control buttons into the display board switch housings. Refer to Figure 30 for the correct pin number identification.
1. To check the "MINUTE TIMER" switch and CR3 diode, connect an ohmmeter (set to RX10 or higher) to pins 8 and 17 at the display board J1 connector and press the minute timer button. Reverse the ohmme­ter leads and again press the "MINUTE TIMER" button. On reading should indicate infinite ohms and the other reading should indicate low ohms (the diode conduction resistance and closed minute timer switch). If a zero (0), low or infinite ohms reading is indicated with the meter leads connected in both directions, the display board should be replaced.
2. To check the "COOK/CLEAN TIME" switch and the CR5 diode, connect the ohmmeter leads to pins 10 and 16 at the display board J1 connector and press the "COOK/CLEAN TIME" button. Reverse the meter leads and again press the "COOK/CLEAN TIME" button. One reading should indicate infinite ohms and the other reading should indicate low ohms (the diode conduction resistance and closed "COOK/
RC231002 Rev. 3 28
CLEAN TIME" switch). If a zero, low, or infinite ohms reading is indicated with the meter leads connected in both directions, the display board should be replaced.
3. To check the "STOP TIME" switch and the CR5 diode, connect the ohmmeter leads to Pins 6 and 16 at the display board J1 connector and press the "STOP TIME" button. Reverse the meter leads and again press the "STOP TIME" button. One (1) reading should indicate infinite ohms and the other reading should indicate low ohms (the diode conduc­tion resistance and closed STOP TIME switch). If a zero (0), low or infinite ohms reading is indicated with the meter leads connected in both directions, the display board should be replaced.
4. To check the "UP" switch and the CR4 diode, connect the ohmmeter leads to Pins 8 and 20 at the display board J1 connector and press the "UP" button. Re­verse the meter leads and again press the "UP" button. One reading should indicate infinite ohms and the other reading should indicate low ohms (the diode conduction resistance and closed "UP" switch). If a zero (0), low, or infinite ohms reading is indicated with the meter leads connected in both directions, the display board should be replaced.
5. To check the "DOWN" switch and the CR4 diode, connect the ohmmeter leads to Pins 6 and 20 at the display board J1 connector and press the "DOWN" button. Reverse the meter leads and again press the "DOWN" button. One reading should indicate infinite ohms and the other reading should indicate low ohms (the diode conduction resistance and closed "DOWN" switch). If a zero (0), low, or infinite ohms reading is indicated with the meter leads connected in both directions, the display board should be replaced.
6. To check the "CLOCK/CANCEL" switch and the CR2 and CR4 diodes, connect the ohmmeter leads to Pins 10 and 20 at the display board J1 connector and press the "CLOCK/CANCEL" button. Reverse the meter leads and again press the "CLOCK/CANCEL" button. One reading should indicate infinite ohms and the other reading should indicate low ohms (CR2 and CR4 diode conduction resistance and closed "CLOCK/ CANCEL" switch). If a zero (0), low, or infinite ohms reading is indicated with meter leads connected in both directions, the display board should be replaced.
7. The CR1 diode can be checked by connecting the
OPERATION AND SERVICE PROCEDURES
(SLIDE IN MODELS)
ohmmeter leads to Pins 10 and 17 at the display board J1 connector and then reversing the ohmmeter leads. One reading should indicate infinite ohms and the other reading should indicate low ohms (CR1 diode conduction resistance). If a zero (0), or infinite ohms reading is indicated with the meter leads connected in both directions, the display board should be replaced.
P.C. BOARD/DISPLAY BOARD INTERCONNECT CABLE
The 20 pin ribbon cable that connects the Clock/Timer P.B. board to the display board can be checked for continuity using an ohmmeter set to the low ohms scale. Refer to Figure 29 and 30 for correct pin identification. If an open
wire is indicated in the ribbon cable, the cable should be replaced.
The information on Page 54 pertains to the 20 wire ribbon cable which connects the P.C. board to the display board. A switch was added to each wire of the ribbon cable to demonstrate the results if that switch/wire opened. This information may be useful in diagnosing and repairing some display/control problems on the digital clock/timer.
Figure 58 - Display Board
Figure 59 - Display Board - Rear View
29 RC231002 Rev. 3
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