SERVICE MANUAL / PARTS LIST
Contents
1. ITEM PART DESCRIPTION QTY ITEM PART DESCRIPTION QTY 1 NT1561 14 SS FLEXIBLE GAS LINE 1 14 NT1624 BLOCK 2 1 2 NT1747 AND VALVE 1 15 NT1523 60 MINUTE 120V 1 NT1073 FUSE 5 2 16 H1178 KNOB 1 4 1074 FUSE BLOCK 2 POLE 1 17 NT1557 AMBER 120V 1 5 NT1567 VARISTOR 1 18 NT1628 LAMP BLUE 120V 1 WATER LEVEL CONTROL 6 NT1829 Nor DES PROBES 1 19 NT1556 RED 120V 2 7 NT1559 FAN CONVECTION 120V 1 20 NT1565 ON OFF SWITCH 1 8 1575 IGNITION CONTROL 1 21 NT1088 MOUNTING LATCH 1 SOLID STATE TIMER SOLENOID 10 NT1574 HIGH TEMP CONTROL 1 23 NT1612 VACCUUM SWITCH 1 SOLID STATE TIMER BLOWER MOTOR 12 NT1720 CONTROL RELAYS 120V 2 25 NT1746 SOLENOID 1 13 NT1568 BUZZERS 120V 2 26 NT1578 IGNITOR SENSOR PROBE 1 SM XSG 5 XSG 5 PLUMBING SIDE COMPONENTS Shown with Auto Fill Option 4 7 wen a WAS WU ITEM PART DESCRIPTION ITEM PART it DESCRIPTION ary 1 NT1555 3 4 MP x HB 90 DEG FITTING 1 11 NT1140 3 8 BRASS NIPPLE 1 2 NT1138 3 8 NPT LOCKNUT 1 12 NT1139 3 8 NPT UNION 1 NT1127 1 1 2 BALL VALVE DRAIN NT1278 MANIFOLD 1 4 1134 3 4 ELBOW NT1721 AUTO FILL VALVE 1 5 1502 CHECK VALVE ASSEMBLY NT1474 90 ELBOW 1 62. 6 18 SERVICE BULLETIN 4263 19 20 BURNER 2 2 2 2 1 21 26 POWER FAILURE AND IGNITION WARNINGS A DANGER Do NOT attempt to operate a XSG 5 during a power failure DEATH INJURY and EOUIPMENT DAMAGE can result During a power failure turn the steamer OFF and close the Main Gas Shut Off Valve A DANGER DO NOT TRY TO LIGHT BURNER WITH A FLAME The XSG 5 has an electronic ignition system which auto matically lights the burner senses flame and controls gas flow This provides precise burner control safe ignition and safe shutdown DEATH INJURY and EQUIPMENT DAMAGE may result from trying to light burners with a flame or from an improp erly adjusted gas control and ignition system Do not try to light the burner with a flame and do not alter the gas control adjustments If adjustment is required contact the Unified Brands Service Department at 888 994 7636 Unified Brands is in no way responsible for the operation or safety of this equipment if the controller valve igniter probe or any other gas system component is adjusted by anyone other than a qualified authorized service representative SM XSG 5 OPERATING SUMMARY SEQUENCE OF OPERATION For Gas Model Manual Filling START UP When the power cord is plugged in there is AC power to terminal 1 HOT and terminal 2 Neutral on t
3. CYCLE END BUZZER HEAT LAMP BURNER BLOWER MOTOR STANDBY LAMP CONTROL RELAY 2 10 SM XSG 5 XSG 5 STANDARD TROUBLESHOOTING a av a 4 6 XSG 5 STANDARD MODELS OPERATING AND SERVICE INFORMATION IMPORTANT The Lower Water Probe located in reservoir must be submerged before unit will turn on It is normal for the Heat Indicator Light to cycle ON and OFF The Convection Fan CFM is on only during the cooking cycle when the door is closed TROUBLESHOOTING GUIDE SYMPTOM amp POSSIBLE CAUSE Unit does not turn ON no power Problem with facility breaker No water in chamber Blown fuse F1 F2 Faulty selector switch SS 1 Faulty lower water probe Faulty water level control Faulty high limit control 5 3 ignition heat light ON Gas supply to unit is OFF Faulty ignition control Faulty igniter probe Faulty gas solenoid valve 5 2 ignition heat light OFF Faulty pressure switch PS1 PS2 Faulty burner blower motor Faulty control relay CR2 Faulty blower timer 5 Heat stays ON does not cycle Normal when door open 1 Faulty pressure switch PS2 2 Faulty gas solenoid valve 3 Excessive steam leaking past door seal Unit is slow to preheat and slow to recover Faulty pressure switch PS2 Steam orifice obstructed Wrong size gas orifice Wrong gas supply
4. 1132 3 4 HOSE 16 NT1479 TUBING 1 7 1091 PRESSURE SWITCH 1 17 1566 F ROBES 2 9 NT1200 BRASS TEE 19 61562 BURNER 1 10 NT1201 1 2 3 8 BRASS REDUCER BUSHING 1 NT1820 3RD WATER LEVEL PROBE AUTO FILL ONLY 1 SM XSG 5 XSG 5 DOOR COMPONENTS QTY 2 NT1106 Screw 10 24 x 3 4 FH Slotted 6f NTi144 Magnetic Door Latch ef Nut Plate O oO O O of NTi509 Panel Inner Door w M1236 welded on 11 NT1179 Washer Silicone 10 2 12 Nier 5 10 24 14755 8 1 Door Insulation not shown NT1729 SM XSG 5 XSG 5 STANDARD WIRING DIAGRAM SUPPLY BEFORE SERVICING SS 2 ON SOL 3 Sw V YELLOW OFF ORANGE YELLOW UPPER PROBE LOWER PROBE VIOLET BLUE BURNER BLOWER TIMER AUTOMATIC IGNITION CONTROLLER REMOTE 0 SPARK gt BURNER PS 1 ORANGE O O LT BLUE WARNING REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY DISCONNECT AC INCOMING POWER AND SHUT OFF MAIN GAS WATER FILL VALVE Optional ADD WATER LAMP ADD WATER BUZZER XSG 5 WIRING DIAGRAM REV 3b 5 09 DS 1 DOOR SWITCH PS 1 COOKING CHAMBER PRESSURE SWITCH VS 1 BURNER BLOWER VACUUM SWITCH SOL 1 GAS VALVE SOL 2 BLOWER CHOKE SOL 3 WATER FILL VALVE OPTIONAL COOK MODE LAMP CONTROL RELAY 1 CONVECTION FAN MOTOR
5. 1 Lime build up on chamber bottom 2 Faulty high limit control 3 Faulty high limit control 4 Faulty high limit thermocouple 5 Faulty lower water probe 6 Faulty water level control Unit does not fill at initial start 1 Water level control PCB 2 Water inlet valve SOL 3 Unit does not refill during normal operation 1 Water level control PCB 2 Defective dirty middle water level probe 3 Water inlet valve SOL 3 Unit overfills 1 Water level control PCB 2 Defective dirty upper water level probe 3 Water inlet valve SOL 3 FOR SERVICE SUPPORT CALL 888 994 7636 SM XSG 5 13 DO NOT remove either chimney assembly atany time during installation STEP 1 Prior to stand mounting remove exhaust deflectors from both units by removing 3 10 24 1 2 truss head phillips screws THPS at indicated locations Original exhaust deflectors will not be re used 3 locations each unit BOTH STEAMERS MUST BE PROPERLY MOUNTED IN STAND BEFORE BEGINNING INSTALLATION OF CHIMNEY KIT Both units should be secured to stand with 4 1 4 20 x 3 4 bolts and lock washers finger tight NOTE Stand brace is not shown in illustra tion Tools required for installation XSG 5 Phillips sc rewdrivers Rubber mallet possibly 7 16 wrench or 7 16 socket with ratchet Estimated time for installation 20 minutes STEP 2 Remove stainless steel outer shroud from upperunitONLY by removi
6. 4 nuts in the rear at incoming gas connection using a Philips head screwdriver Check for gas leaks install right side panel 26 SM XSG 5 SM XSG 5 Unified orands A DOVER COMPANY 1055 Mendell Davis Drive e Jackson MS 39272 888 994 7636 601 372 3903 Fax 888 864 7636 unifiedbrands net PART NUMBER 158634 REV 11 11
7. Incorrect pressure at supply Faulty gas burner Unit shuts down during preheat and or normal Operation 1 Lime build up on chamber bottom 2 Faulty high limit control 3 Faulty high limit control 4 Faulty high limit thermocouple 5 Faulty lower water probe 6 Faulty water level control Unit does not fill or overfills with water 1 2 Add water light illuminates with water in unit 1 Faulty Dirty upper water probe 2 Faulty water level control Fill Switch SS 2 Water Inlet Valve SOL 3 Units With Semi Water Fill Option Only FOR SERVICE SUPPORT CALL 888 994 7636 11 SM XSG 5 XSG 5 AUTO FILL WIRING DIAGRAM BLACK WARNING 115 VOLTS AC REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY GND DISCONNECT AC INCOMING POWER AND SHUT OFF MAIN GAS SUPPLY BEFORE SERVICING WATER FILL VALVE XSG 5 WIRING DIAGRAM WITH AUTO FILL OPTION REV 4 5 09 DS 1 DOOR SWITCH PS 1 COOKING CHAMBER PRESSURE SWITCH YELLOW VS 1 BURNER BLOWER VACUUM SWITCH PEPER TROBE SOL 1 GAS VALVE MIDDLE PROBE SOL 2 BLOWER CHOKE LOWER PROBE SOL 3 WATER FILL VALVE VIOLET COOK MODE LAMP CONTROL RELAY 1 CONVECTION FAN MOTOR CYCLE END BUZZER HEAT LAMP 6 AUTOMATIC BURNER IGNITION BLOWER CONTROLLER REMOTE TIMER BURNER BLOWER MOTOR STANDBY LAMP CONTROL RELAY 2 12 SM XSG 5 XSG 5 AUTO FILL TROUBLESHOOTING XSG 5 WITH AUTO FILL OPT
8. energized and the Igniter commences to spark until a flame is detected or the Trial for Ignition period of 10 seconds expires Once the flame is detected the spark is shut off and the main gas valve remains energized Should the burner fail to light or flame is not detected during the first trial for ignition period the gas valve is de energized and the control starts the inter purge sequence of 15 seconds before attempting another Trial for Ignition The control will make two additional attempts and if unsuccessful will go into lock out Lockout Recovery is accom plished by turning the power switch to the OFF position Waiting a minimum of 5 seconds then return the power switch to the ON position THE TIMER In Standby Mode Control Relay 1 is de energized the Internal Convection Fan Motor and the Cook Lamp are OFF and Standby Lamp is ON In Timed Mode timer turned to any timed sequence or Untimed Cook Mode full on control relay 1 is energized turning on the Cook Lamp The Internal Convection Fan is energized and Standby Lamp is OFF Time Mode Continued Timer will time down until the buzzer sounds Turning the buzzer off will activate the Standby Mode unless the timer is reset to a Timed or Untimed Cook position ADD WATER LIGHT If the water level drops below the high probe the heating circuit is de energized and the Add Water Light and Buzzer will come ON If the water level continues to drop below the low probe the unit will co
9. 6 SERVICE MANUAL PARTS LIST MODEL XSG 5 BD unified brands GDOVER COMPANY 1055 Mendell Davis Drive e Jackson MS 39272 888 994 7636 601 372 3903 Fax 888 864 7636 unifiedbrands net PART NUMBER 158634 REV 11 11 SM XSG 5 TABLE OF CONTENTS POWER FAILURE AND IGNITION 3 OPERATING 5 2 2 1 1 Sequence of Operation Manual 4 Sequence of Operation Auto 5 In Field Modificato S 6 High 6 CONTROL SIDE 6 7 PLUMBING SIDE COMPONENTS 6 8 DOOR 00 9 STANDARD WIRING 10 STANDARD 11 AUTO FILL WIRING e 12 AUTO FILL 5 2 13 DOUBLE STACK CHIMNEY KIT 5 14 16 NORMAL OPERATING 17 COMPONENT
10. ION OPERATING AND SERVICE INFORMATION IMPORTANT The Lower Water Probe located in reservoir must be submerged before unit will turn on It is normal for the Heat Indicator Light to cycle ON and OFF The Convection Fan CFM is on only during the cooking cycle when the door is closed TROUBLESHOOTING GUIDE SYMPTOM amp POSSIBLE CAUSE Unit does not turn ON no power 1 Problem with facility breaker 2 No water in chamber 3 Blown fuse F1 F2 4 Faulty selector switch SS 1 5 Faulty lower water probe 6 Faulty water level control 7 Faulty high limit control No ignition heat light ON 1 Gas supply to unit is OFF 2 Faulty ignition control 3 Faulty igniter probe 4 Faulty gas solenoid valve No ignition heat light OFF 1 Faulty pressure switch PS1 PS2 2 Faulty burner blower motor 3 Faulty control relay CR2 4 Faulty blower timer Heat stays ON does not cycle Normal when door open 1 Faulty pressure switch PS2 2 Faulty gas solenoid valve 3 Excessive steam leaking past door seal Add water light illuminates with water in unit 1 Faulty Dirty upper water probe 2 Faulty water level control Unit is slow to preheat and slow to recover Faulty pressure switch PS2 Steam orifice obstructed Wrong size gas orifice Wrong gas supply Incorrect pressure at supply Faulty gas burner Unit shuts down during preheat and or normal operation
11. Mode timer turned to any timed sequence or Untimed Cook Mode full on control relay 1 is energized turning on the cook lamp The internal convection fan is energized and standby lamp is OFF Time Mode Continued Timer will time down until the buzzer sounds Turning the buzzer off will activate the Standby Mode unless the timer is reset to a Timed or Untimed Cook position NO ADD WATER LIGHT The water level is controlled by the water level control board The control will maintain the water level between the high and middle probe HIGH LIMIT The High Limit uses Type K thermocouple to monitor excessive heat in the combustion chamber When a temperature exceeding 500 F is detected the control will shut down the heating circuit The control has an auto reset function and will automatically reset when the detected temperature drops below the set point 5 SM XSG 5 OPERATING SUMMARY With the water resevoir full and the Main Gas Shut Off Valve open turn the OFF ON switch to the ON position and set the timer to 15 minutes When the cycle is complete the unit will automatically switch to the STANDBY mode at which time the cooker is ready for use IMPORTANT IF GAS SUPPLY IS INTERRUPTED DURING OPERATION A FIVE 5 MINUTE PERIOD OF COMPLETE SHUT OFF OF GAS SUPPLY IS REQUIRED BEFORE RE STARTING In Field Modifications Any in field modifications made without written authorization from the Unified Brands Engineering Department w
12. de the burner unit running initially then stopping Corrective Action The action depends on the problem category If you experience a popping noise at the burner check for proper gas pressure at the incoming supply line gas valve or manifold Nat Gas supply to be set at 3 5 and Lp to be set at 10 0 If you experience the unit igniting and operating intermittently shutting down during operation Remove the Igniter and check the spark gap should be 74 see figure 2A Check the igniter and sensor probe to make sure they are not to close or touching the burner also check to make sure the burner has not ignited and is burning internally or back flashing see figure 1A If this occurs the Igniter and ground should be bent 74 away from the burner See figure 1A Extreme Steam Gas Steamers 1055 Mendell Dovis Drive Jackson M5 39272 888 994 7634 888 864 7636 unifiedbrands net ADDIDONAL MANUFACTURING LOCATION 525 SOUTH COLDWATER ROAD WEDMAN Mi 48893 19 SM XSG 5 Internal View of Burner Box Figure1A The Igniter E1578 and ground should be 74 away from the burner Figure 2A The 74 space require between Igniter E1578 and ground For any further details or guestions contact the Groen Technical Support at 1 800 676 9040 20 SM XSG 5 INTEK XTREME STEAM BURNER NT1562 REPLACEMENT STEP 1 5 BURNER REMOVAL Step 1 Remove the Right hand side panel and 4 screws in the rear at
13. he choke timer When the ON OFF switch is activated terminal 3 on the choke timer is energized starting the choke timer sequence The choke solenoid is energized for 16 seconds The high limit is also energized sending power to the common terminal of the LLCO contacts on the Water Level Control The water level board is also energized causing the H L High Low contacts on the Water Level Control board to switch Manual filling of the steamer is now required Once the water level in the steamer reaches the lower probe the LLCO contacts switch sending power to the common terminal of the H L contacts causing the add water light and buzzer to come on When the steamer cavity is filled with enough water to hit the high probe the H L contacts switch and power is sent down to the heat circuitry While that is occurring you are still timing the choke timer once the choke timer has run its sequence it can only be re energized by turning the ON OFF switch OFF and then back ON Pre filling the steamer cavity before activating the ON OFF switch is recommended on manual fill models If the pressure switch is closed Control Relay 2 will energize sending power to the burner blower timer energizing the burner blower When the blower comes up to speed it pulls a vacuum closing VS 1 turning the Heat Lamp ON and energizing the ignition controller The ignition controller performs a self diagnostics on power up After a pre purge of 5 seconds the main gas valve is
14. ill void your warranty Please call 888 994 7636 to reach the Engineering Department High Limit Lockout The XSG 5 has a High Limit Lockout to protect the unit from overheating If the XSG 5 reaches the high limit temperature it will completely shut down and the Steamer must be reset before cooking can continue SM XSG 5 A If the XSG 5 overheats and shuts completely down while cooking no lights open the door and verify that water is in the reservoir If there is no water in the reservoir 1 Wait for the steamer to cool 2 Clean the water level probes 3 Reset the High Limit Lockout See B 4 Restart the steamer If there is water in the reservoir at the operating level 1 Turn OFF the steamer and drain the water from reservoir 2 Wait for the steamer to cool 3 Clean the water level probes 4 Reset the High Limit Lockout See B 5 Restart the steamer 1 Open the cooking compartment door and wait for the steamer to cool 2 After the steamer is cool check that the Water Level Sensor Probes are clean 3 Fill cooking compartment with 3 gallons of water 4 Turn the unit OFF and then ON again 5 If the High Limit Lockout repeats call the Service Department at 888 994 7636 LC OG XSG 5 CONTROL SIDE COMPONENTS 928 9 10 S LEAN C2 8 14 P LZ 4
15. incoming gas connection using and 4 nuts securing the bracket with a Philips head screwdriver Remove the 2 screws from ignitor and disconnect the wires to the choke Remove 4 1 4x20 nuts supporting the blower choke and remove the blower choke 21 SM XSG 5 Step 3 Remove the Right and Left heat shields and insulation by removing 6 8 32x1 2 screws Step 4 Remove 3 8 32 x1 2 hex slot screws in burner support bracket and slide burner out 22 SM XSG 5 4 2 Step 5 Remove burner support bracket and use a crescent wrench to remove the gas line from the burner and slide the old burner out 23 SM XSG 5 STEP 1 6 BURNER INSTALLATION Step 1 Apply pipe dope to the orifice use 11 16 socket to tighten during install Step 2 Slide the new burner onto the burner support brackets and add the support bracket for the top Attach the gas line and tighten with a crescent wrench 24 SM XSG 5 Step 3 Install 3 8 32 x1 2 hex slot screws into burner support bracket and slide burner out Step 4 Install insulation Left and Right heat shields using 6 8 32x1 2 hex slot screw and grommet for flexible gas line 25 SM XSG 5 Install 2 8 32 x1 2 hex slot screws for the ignitor and sensor connect ignition cable and sensor Install 4 1 4x20 nuts supporting the blower choke and connect the blower choke wires Step 6 Install 4 Philips head screws and
16. installed in step 5 Once lined up slide down forcefully to lock in place until screw holes line up Use 4 10 24 1 2 THPS at indicated locations to secure NOTE Stand brace isnot shown in illustration 15 SM XSG 5 Questions Call 1 888 994 7636 XSG 5 Double Stack Chimney Kit Installation rev 1 10 stainless steel outer shroud STEP 7 Attach new stainless steel outer shroud M1608 by aligning 8 tabs with remaining sots the upper unit s chimney assembly asshown Slide down to lock in place No screws are required to secure this piece in place NOTE Stand brace isnot shown in illustration STEP 8 Insert new exhaust deflector M1610 on the inside of new stainless steel outer shroud asshown spanning both chimneys Attach using 3 10 24 1 2 THPS at indicated locations NOTE Stand brace isnot shown in illustration 10 24 screws 1 each side stainless steel inner shroud STEP 9 Position stainless steel inner shroud M1609 between steamers and attach to outer shroud using 2 10 24 1 2 THPS at indicated locations Complete installation by tightening 8 1 4 20 x 3 4 bolts 4 each unit that secure steamers to stand NOTE Stand brace isnot shown in illustration 16 SM XSG 5 NORMAL OPERATING RANGE FOR BOTH NATURAL GAS amp PROPANE CO2 X air 7 9 45 60 Eff 78 85 02 CO 4 0 8 0 0 0 100 UL standard is less than 800 Fla
17. me Sensor NG 65 75 mV or greater Flame Sensor PROPANE 75 82 mV or greater Nominal BTU 65 000 UL standard Operating Range 2 5 63 375 66 625 Natural Gas BTU hr Cubic Feet hr x 1009 BTU 1 cubic ft Propane BTU hr Cubic Feet hr x 2500 BTU 1 cubic ft Measure cubic feet used in 5 minutes Multiply that by 12 to equal 60 minutes Multiply answer by the correct factor above to equal BTU hr SM XSG 5 17 XSG TOTAL AMPS AT ONE TIME DESCRIPTION Convection Fan Blower Motor Lamp x 2 Ignition Module Control Relay x 2 Buzzer Water Fill Valve Level Control Board Watlow High Limit Choke Solenoid Gas Valve Total AMPS 0 34 0 55 0 0048 0 0005 0 046 0 054 0 083 0 037 0 083 0 2 0 08 1 47 18 SM XSG 5 unified brands SERVICE BULLETIN 263 DATE September 27 2011 Models Affected Extreme Steam Gas Steamers Subject Igniter Sensor Probe NT1578 Purpose To Prevent Ignition Related Failures Issue Results There is evidence of ignition problems that can be caused by improper igniter placement and improper gas pressure The problems can be categorized in three ways 1 Gas pressure is too high or too low 2 Part of the burner is making contact or close to the ignition electrode providing a ground such that either insufficient spark or no spark is present Experiencing issues such as popping noise intermittent burner operations and burner appears to be burning gas insi
18. mpletely shut down HIGH LIMIT The High Limit uses a Type K thermocouple to monitor excessive heat in the combustion chamber When a temperature exceeding 500 F is detected the control will shut down the heating circuit The control has an auto reset function and will automatically reset when the detected temperature drops below the set point SM XSG 5 OPERATING SUMMARY SEQUENCE OF OPERATION For Gas Model Auto Fill START UP When the power cord is plugged in there is AC power to terminal 1 HOT and terminal 2 Neutral on the choke timer When the ON OFF switch is activated terminal 3 on the choke timer is energized starting the choke timer sequence The choke solenoid is energized for 45 seconds The high limit is also energized sending power to the common terminal on the LLCO contacts of the Water Level Control The Water Level Control board is also energized causing the H L High Low contacts to switch energizing the Water Fill Valve Once the water level in the steamer cavity reaches the low probe the LLCO contacts switch sending power to the heating circuitry Water will continue to fill passed the middle probe to the upper probe When the water level reaches the upper probe the water valve is de energized When the water level drops below the upper and middle probe the water valve is re energized and refills the steamer cavity to the top probe If the water level drops below the low probe the LLCO contacts will switch sh
19. ng 1 10 24 x 3 4 THPS and nylon spacer at indicated location Pull straight up on shroud to release 8 tabs from dots This shroud will not be re used Double Stack Chimney Kit Installation rev a 1 10 57 Questions Call 1 888 994 7636 gt chimne STEP 3 Remove 3 10 24 x 1 2 THPS at indicated locations Leave aluminized steel sheet metal chimney of upperunit in place SM XSG 5 STEP 4 Attach chimney brace M1600 as shown with tabs facing up using 3 10 24 x 1 2 THPS Remove 2 remaining screws at indicated location for next step Part 1 M1601 STEP 5 Attach first piece of lower unit chimney extension M1601 as shown using 3 10 24 x 1 2 THPS at indicated locations It is critical to install this piece correctly All flanges must be in the airspace between the aluminized steel chimney and the surrounding stainless steel Extension has relief area specifically to assist in installation See detail views It may be necessary to move upper unit slightly to allow screw holesto line up 4 each side 10 24 screws 2 each side 727772727222 N Part 2 M1602 STEP 6 Attach second piece of lower unit chimney extension M1602 by aligning 8 slots with tabsof chimney brace AND 8 tabs 4 each side with slots in the upper unit s chimney assembly side flanges of this piece need to be on the outside of the extension piece
20. utting down the heating circuitry While the steamer cavity is filling the choke timer is still iming once the choke timer has run its sequence it can only be re energized by turning the ON OFF switch OFF and then back ON If the pressure switch is closed Control Relay 2 will energize sending power to the burner blower timer energizing the burner blower When the blower comes up to speed it pulls a vacuum closing VS 1 turning the Heat Lamp ON and energizing the ignition controller The ignition controller performs a self diagnostics on power up After a pre purge of 5 seconds the main gas valve is energized and the Igniter commences to spark until a flame is detected or the Trial for Ignition period of 10 seconds expires Once the flame is detected the spark is shut off and the main gas valve remains energized Should the burner fail to light or flame is not detected during the first trial for ignition period the gas valve is de energized and the control starts the inter purge sequence of 15 seconds before attempting another Trial for Ignition The control will make two additional attempts and if unsuccessful will go into lock out Lockout Recovery is accom plished by turning the power switch to the OFF position Waiting a minimum of 5 seconds then return the power switch to the ON position THE TIMER In Standby Mode Control Relay 1 is de energized the Internal Convection Fan Motor and the Cook Lamp are OFF and Standby Lamp is ON In Time
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