PARTS & SERVICE MANUAL - Garland
Contents
1.2. BURNER ORIFICE REPLACEMENT Shut off power at main breaker Shut off gas supply to the oven and disconnect the flexible gas line to oven Remove rear control box cover Remove burner manifold See TEMPERATURE REGULATION VALVE Remove main burner orifice from burner manifold Reassemble in reverse order and check system operation Check all gas line fittings for leaks mm o o mn gt REVERSING SWITCH REPLACEMENT Shut off power at main breaker Remove rear control box cover Remove wires from reversing switch and mark for reassembly Remove mounting nut and remove switch Reassemble in reverse order and check system operation CONVEYOR DRIVE MOTOR REPLACEMENT Shut off power at main breaker Hemove conveyor and both control box covers Disconnect all wiring from motor and mark for reassembly Remove coupling from motor drive shaft Remove four screws and remove conveyor motor and mounting bracket Remove mounting bracket from conveyor motor Reassemble in reverse order and check system operation Qmmoogz REVERSING CONVEYOR DIRECTION A Shutoff power at oven switch B Set conveyor reversing switch in the other position C Turn oven and check for proper operation CAPACITOR CONVEYOR DRIVE MOTOR REPLACEMENT Shut off power at main breaker Remove rear control box cover Discharge capacitor before removing wires Mark wires for reassembly Hem
3. Express Service Manual Domestic 23 24 REPLACEMENT IE OT P Shut off power at main breaker Remove rear control box cover Discharge capacitor Hemove capacitor Reassemble in reverse order and check system operation ON OFF SWITCH REPLACEMENT MOOWD Shut off power at main breaker Remove conveyor and front control box cover Depress spring clips on sides of switch and push out Remove wires from switch and mark for reassembly Reassemble in reverse order and check system operation NOTE Make sure switch housing is fully seated in control box housing FUSE HOLDER REPLACEMENT Shut power at main breaker Remove rear control box cover Remove wires from fuse holder and mark for reassembly Hemove mounting screws or mounting nut on fuse holder and remove fuse holder Reassemble in reverse order and check system operation COOLING FAN CONTROL BOX REPLACEMENT Shut off power main breaker Remove appropriate control box cover and conveyor if necessary Remove four mounting screws from fan frame Disconnect power cord and remove fan Reassemble in reverse order and check system operation Check for air flow THERMOSTAT COOLING FAN REPLACEMENT mU m Shut off power at main breaker Remove conveyor and front control box cover Remove wires and mark for reassembly Remove two mounting screws and remove thermostat Re
4. Lincoln PARIS amp SERVICE MANUAL Impinger 1 Express Series Domestic Models MODELS Please note that the model numbering system changed March 2007 The chart below showsthe old model numbering system and its matching new model number Old Model Number New Model Number 1116 080 A or A1 1116 00z U Kxxxx 1116 062 8R 1116 00z U Kxxxx 1116 023 8 1116 00z U Kxxxx 1117 080 A or A1 1117 00z U Kxxxx 1117 023 8 1117 00z U Kxxxx 1130 080 A or A1 1130 00z U Kxxxx 1131 080 A or A1 1132 080 A or A1 P N L371076 REV 10 19 09 Lincoln Foodservice Products LLC 1111 North Hadley Road Fort Wayne Indiana 46804 Telephone 260 459 8200 Fax 888 790 8193 Technical Support 800 678 9511 linc olnfp com MODEL NUMBER KEY EXAMPLE 1116 B00 E K1801 16 800 E Panel Setup Code Agency Code i e CE amp RoHS combined Custom Configuration Code i e General Market Version Language Code Indicates change to base assembly i e Natural Gas 230V 1 phase 50 Hz Oven Platform Size i e Impinger 11 Engish Dom int Default Franoeituembourg P Norwegian Norway b am y Engien Sweden s engisn Aa _ I N Engish imicorea W English Middle East Dutch amp AGEN
5. OVEN CONTROL REPLACEMENT Shut off power at main breaker Remove conveyor and front control box cover Remove all wiring connections and mark for reassembly Remove oven control by pulling control from the mounting pins Remove control from oven Before installing new oven control set voltage jumper located at the bottom center of the oven control to the proper voltage 120V 240V position Set frequency jumper to the proper frequency 50Hz 60Hz Install the four pushbutton extensions included with the oven control by pushing the extensions onto the four set buttons on control F Reassemble in reverse order and check system operation Setthe oven control for the proper operating mode The 1100 series ovens use a single temperature control system The oven control must be set to the proper operating mode Set the control as follows With the oven power switch off depress the time and up buttons and turn the oven on Control will indicate Imp or Imp II Release the buttons The control will indicate Temp to store Press the up or down button until Imp Il appears on the display Press the temp button The control is now set for single burner operation TODD TRANSFORMER CONTROL REPLACEMENT See TRANSFORMER REPLACEMENT THERMOCOUPLE REPLACEMENT Shut off power at main breaker Remove conveyor and bottom finger assembly Remove front control box cover Remove therm
6. VO STONINOO OLOR 3504 0414 HIMOd HOLIMS 1711910 1081NOD NOD 1Y134 i 00 BOA JANOO 801177477 22 ONI 1000 MO10M rH NIYA 12 YOLON HOLIMS 3901553399 Sdy JNO 15 ONT MIM NYJ NIWA NYG 21 CH so A 034 In 11504 13 OL 25 H 11MS 40 1121410 3S8JA39 01 802 n18 07 OL 90 0 3 310 HO FOL Impinger Il Express Service Manual Domestic 12 DIAGRAM ALL MODELS S N 0809210000017 AND ABOVE 12959082 4884114 VNYIONI JNAYM 1804 DDI 4G LISOS 194 01 5 11211851 40414 2 40 40112311 3585343 Gl apr pra 1 aa I Ore 01 kde 3991104 HOLON 145 310N En ShOIIwvu4mbI IND LI HIDE Hl Ei EF 1 jgcunogo DI 013105 31952 31 lt HTJ 081818 Nn di 11298 IH 039 02 LH IW 1004 Q1 418 gt r TE 3214 TOHINGI GILONIM 02 Av130 HAMIL H 3441 31460020H43H L N3AG LIMI LVLSOHSSHI ORI 1003 10514502 58 HIMOd KIYA HILINE 1 1 2114 4348 HINIL
7. EL 03 200 9 38 OL 013145 358v 99 DA SV lt d T la L C9 19 21 QU AOre 01 YIANNC 4941 10 YOLOW 135 310N NIHIN NIVH dY2 NYE LWA IH 033 MOI 1710 01 418 8 Aiit 3840 SHIM TOHLNOI HINYOISNYUIL LUX 931014 02 AVT30 H3HIL 83 8 3 3140020 1 NJAO 147 KGS 30015039 ivisUmosHi E ONISYIAIH HOAIANDI HOlIMS M3HOd HOLIMS Sg 2 G x XX 01 YOLOW NJAO LU 90 04 EH 9 11003 01014 4 NJAO 901014 IH 13119404 WH HOSN3S 104444 TIVH SH 524 9 40051 SIN3H3 3 0 04 HOA3ANOD Si Sts HOLIMS NSE yiv Express Service Manual Domestic DIAGRAM MODEL 1132 080 A 1132 080 A1 1133 080 A 1133 080 A1 E IER T eG SNIMIM INM313 9NILVH I O YNVIONI NAY 1404 NVa VIN d N3A0 7 IW 5310 OZ AV130 M3MIL 01 L3NOVM W ejospoxg eogA 399100 3441 314 20 1 21 05135 193443 TIVH SH NJAO LIMI H9IH 1VISOWM3HL TL 5249 MOOS SIN3H3 3 9 H 50114909 SNISNOH 13005 t eN17002 TOMINO
8. maos 0 maose 5 maona Jo N A 21 1178 00z U Kxxxx 1 1 1 1 1 1 1 1 1 1 1 1 1 Impinger Express Service Manual Domestic 39 40 OVEN BACK ASSEMBLY ALL MODELS Heating Elements 208 Volt Models 1130 08H A amp 1132 08H A S N 10062053640 amp below 240 Volt Models 1131 08H A amp 1133 08H A S N 10062053641 amp above E Rear wall for the following models 1132 08H A 1172 000 U 1130 08H A 1170 000 U 7 2 G Gas ovens 120VAC Electric ovens 208 240VAC TC mar Impinger Express Service Manual Domestic OVEN BACK ASSEMBLY VIEW ALL MODELS Impinger Express Service Manual Domestic 41 42 CONVEYOR DOOR ALL MODELS ON rr i Crumb right S N ee below Crumb pan right and left S N 2045453 amp above 36224 Crumb pan left S N 2045452 8 below Crumb pan left S N 2045452 8 below S N 2045452 amp below G Conveyor fame assembiy O Comeyorbeaing Sprocket includes set screw Regular Conveyor RS includes set screw ai Duty Conveyor 6 W P Q Dooriaon amp cate _ R Doorassembly 8 88997 Window rame top NLA See Access Door Section 369925 Glass access window NLA See Access Door Sectio
9. NOTE The display also indicates oven temperature Closing the main power switch supplies 208 240VAC to the conveyor motor and to the primary of the control transformer Secondary voltage 24VAC is supplied to the oven control Setting the oven control to the desired time outputs voltage through a reversing switch to the conveyor motor NOTE The conveyor system uses a hall effect sensor and magnet to prove operation of the conveyor motor If the conveyor motor is not running BELT is indicated on the display When the oven is started the time delay relay timing circuit is enabled permitting the oven fans to run approximately 20 minutes after the oven is shut off to cool the oven The time delay relay will keep the coil of the fan relay closed maintaining operation of the main fan and cooling fans Impinger Express Service Manual Domestic SEQUENCE OF OPERATION IMPINGER II ADVANTAGE ELECTRIC S N 0809210000017 amp ABOVE OVENS WITH PUSH BUTTON CONTROLS Oia ods Number gt New Model Number Voltage He Phase gt 28 gt NA uso erat gt 240 moma wA 240 sone 206 3 200 3 oss 3 20 om 3 mona 3 uwa P
10. 1002 SOLOM NYJ h3 O 31311 484138 1594 HOLDN 5411002 HOLOW NIAO HOLON IH HOSHIS 133441 1198 3 518318313 113 WO HOLOW 3504 N3AG 10 1 02 SOLON HOAJAWOD 42 038 GL 01124442 19 H3LIMS 34155384 HIT str CL I ji T 13 1 T 1 338 13 Express Service Manual Domestic TROUBLESHOOTING GUIDE GAS OVENS Old Model Number New Model Number Gas Type Voltage Hz Phase 1116 023 8 1116 002 0 Natural 120 1117 023 8 1117 007 0 120 SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not run Incoming power supply Check circuit breakers reset if required Check power plug to be sure it is firmly in receptacle Measure incoming power call power co if needed Fuse 10 Amp Check replace if necessary Fuse holder Check replace if necessary Hi limit thermostat Check for voltage on both sides of switch Terminals control box are normally closed If open reset and test oven for proper operation If thermostat will not hold and control box temperature is not exceeding 140 F 60 C replace thermostat e dini switch as needed Main fan motor Check for 120VAC at motor If no voltage is present trace wiring back to main power switch WI
11. II 31 4 YINUNO UINYUOASNVUL ZYX 13 TOYLNOI 45 1 LUX 311 91 6 LOH VNVIQONI JNAVM 1404 Al3dvs WAA ZA 909135 193443 TWH ou ejompoxg MF EET D JAIOSPOO 3 sol I 1009 LVISONUIHI 21 UINUNA HOLIMS X08 LINIT IVASOWYSHL LL 1439 NIYN HOLIMS 9NISH3A3M MOAJANOO HOLIMS 25 NJAO 100 d3MOd HOLIMS 15 01014 HOA3ANO2 112 4 2 MOA3ANOO SH NIVH YOLIOVdYD YINYNA 004 FH TOYLNOI 309 BE b EW o ES WOILISOd OL 25 HOLIMS _ 2 JO 1193410 JLON SNOT INO 5 144206 NOIlV80913JNO3 15 030009 38 01 Q 3IHS 38V lt P E 39Vl 10A 004 135 310N Impinger Il Express Service Manual Domestic DIAGRAM MODEL 1130 080 A 1130 080 A1 1131 080 A 1131 080 A1 S N 0809210000016 AND BELOW nc Lp aa ee NOD 15 390 18 TYNIWYSL YIMOd 8 T 11 usu du VNVIONI 1403 DAG PNP asepa Sha AT i NOTLISOd 1X3N Ol 25 H311MS 90137040 30 N01153MIQ 358 8 OL 310N
12. a Also check flexible gas line connection for any damage ee If not operating refer to Oven fan will not run Impinger Il Express Service Manual Domestic Centrifugal switch of main fan motor Hi limit thermostat oven cavity Burner blower motor Burner transformer Centrifugal switch of burner blower motor Ignition control Hot surface igniter Ignition control Gas control valves Impinger Il Express Service Manual Domestic Check for 120VAC at wire 5 input to centrifugal switch located at 6 pin connector in raceway near the main fan motor to neutral If no voltage is present trace wiring back to the main power switch If voltage is present check for 120VAC at wire 22 output of centrifugal switch to neutral If no voltage is present at 22 and the motor is running replace the main fan motor Terminals are normally closed If open reset thermostat and retest If thermostat will not hold for maximum oven temperature and oven is not exceeding temperature setting check for proper location of capillary bulb in its spring holder If the capillary checks okay replace the hi limit thermostat Check for 120VAC supplied to burner blower motor at wire 13 to neutral If no voltage is present trace wiring back to the main power switch If voltage is present and the motor is not running check for opens shorts or grounds WITH POWER OFF Turn motor to check for locked rotor Check for
13. cool down Replace relay as needed Main fan runs after Oven start relay Contacts should open when main power switch is 20 minute cool down turned off Replace relay as needed 20 Minute time delay 208 or 240VAC at terminal 2 should discontinue approx 20 minutes after main power is switched off If the oven start relay contacts are open and the voltage continues at terminal 2 of the 20 minute timer for more than 20 minutes replace the 20 minute time delay Oven fan relay Check to insure that the relay contacts are opening after the relay coil is de energized Replace relay as needed 20 Minute time delay NOTE On off operation of the main power switch will set the timer to 20 minutes If the timer is accidentally reset turn off the main circuit breaker for 15 seconds to cancel Check circuit breakers reset if required Check power plug to be sure it is firmly in receptacle Measure incoming power call power co if needed Switch main power Check continuity between switch terminals Heplace switch as needed Cooling fan Check for supply voltage at cooling fan If no voltage is present trace wiring back to power switch If voltage is present and motor does not run check for opens shorts or grounds WITH POWER OFF Check for locked rotor No control box cooling Incoming power No automatic control box Incoming power supply Check circuit breakers reset if required Check cooling power plug to be sure it
14. is firmly in receptacle Measure incoming power call power co if needed Cooling fan thermostat Check the cooling fan thermostat Thermostat closes at 120 F and opens at 100 F With the cooling fan thermostat pre heated check for continuity If switch is open replace cooling fan thermostat Cooling fan Check for supply voltage at cooling fan If no voltage is present trace wiring back to cooling fan thermostat If voltage is present and motor does not run check for opens shorts or grounds WITH POWER OFF Check for locked rotor Check for main fan operation If it is not operating refer to Oven fan will not run This normally open switch should close when the main fan is activated Refer to the Removal and installation section for proper adjustment Replace as needed Check for 208 or 240VAC supply to the primary of Air pressure switch Control transformer the control transformer If no voltage is present trace wiring back to the main power switch If voltage is present check for 24VAC at the transformer secondary If there is primary voltage but no secondary voltage replace the control transformer Oven control Check for 24VAC supply to control If no voltage is 20 Impinger Il Express Service Manual Domestic Thermocouple Mercury contactor Heating element s Impinger Il Express Service Manual Domestic Thermocouple Oven control Oven control present trace wiring back
15. 120VAC supplied to the primary of the burner transformer If no voltage is present trace wiring back to the oven cavity hi limit thermostat If voltage is present check for 24VAC at transformer secondary If there is primary voltage but no secondary voltage replace burner transformer Check for 24VAC at motor connector wire 13 to neutral If voltage is not present trace wiring back to transformer If voltage is present check for voltage at wire 14 to neutral If no voltage is present at wire 14 and motor is running replace burner blower motor Check for 24VAC at ignition control terminals marked 24V if no voltage is present trace wiring back to centrifugal switch Check for 120VAC to ignition control at terminal L1 to neutral If no voltage is present trace wiring back to main power switch When 24VAC is supplied to the ignition control the ignition control switches 120VAC to the hot surface igniter If 24VAC and 120VAC are supplied to ignition control but there is no voltage at the hot surface igniter replace the ignition control If 120VAC is present at hot surface igniter terminals visually check to see that the igniter is heating igniter may be viewed through the port in the end of burner tube The igniter should glow bright red If the igniter does not heat replace the hot surface igniter After 45 seconds of hot surface igniter pre heat the ignition control will switch 24VAC to the gas control valves Check for 24V
16. AC output from ignition control across terminals marked valve and valve gnd If no voltage is present replace ignition control When 24VAC is supplied to the gas control valves the valve should open Check for gas pressure at the manifold tap located just before the burner If there is no pressure check the incoming gas supply to be sure all manual valves are open and flexible gas hose is properly connected If gas is present and the gas control valve is energized but there is no gas pressure at the burner manifold replace the gas 15 __ control valves Flame will not stay lit Hot surface igniter Six seconds after the gas valve opens ignition must occur If flame is not detected the ignition control will shut off and lock out To reset the ignition control turn off the power switch for 45 seconds then turn the switch on to re try ignition The ignition control requires a minimum of 0 8 DC microamps to prove flame To check flame sensing operation connect a digital multimeter capable of measuring DC microamps between the ground terminal on ignition control and the ground lead NOTE This is a current measurement and the meter must be connected in series If these readings are not achieved replace hot surface igniter NOTE The DC microamp test must be conducted with the oven in low flame bypass operation Set the temperature control to the lowest setting Power supply If there is sufficient microamp cu
17. CY CODE TABLE CODE AGENCY CE amp RoHS compliance combined 4 lt gt lt US amp Canada compliance only Advantage style oven to be phased out B Australia AGA Impinger Express Service Manual Domestic SEQUENCE OF OPERATION IMPINGER ADVANTAGE GAS OVENS WITH PUSH BUTTON CONTROLS Old Model Number New Model Number Gas Type Voltage Hz Phase 1116 023 8 1116 002 0 Natural Gas 120 VAC 1117 023 8 1117 00z U Kxxxx 120 VAC POWER SUPPLY CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT BURNER CIRCUIT IGNITION CONTROL TEMPERATURE CONTROL CONVEYOR DRIVE Electrical power is supplied to the oven by a three conductor cordset Voltage from the black conductor to the white conductor is 120VAC Black conductor is hot White conductor is neutral Green conductor is ground When the temperature in the control box reaches 120 F 3 48 9 C 1 7 the cooling fan thermostat will switch power to the control box cooling fans The thermostat will interrupt power to the cooling fans when the control box temperature falls to 100 F 3 37 8 C 1 7 Power is permanently supplied through a 10 amp fuse to the normally open main power switch Power is also supplied to the normally open cooling fan thermostat Closing the main power switch supplies 120VAC to the main fan motor the cooling fan motors the primary of the control transformer the conveyor motor and to the
18. L YOLOH 3513 24 14 NJAO NOI HOA3ANO2 HO0112Vdy2 22 S Z 301 12 HOlIMS 3un5S3Hd 54 Express Service Manual Domestic DIAGRAM MODEL 1162 080 V99r9oBc YOLOW AVT3H LU webu dw SUNN SHIM e ea T PEE VNVIONI 3NAYM 1903 SdAL 31dnOOOMHzHl 91 4974 1411 H9IH LVISOMHSHI 21 MOSN3JS 123343 TIVH SH 1100 10140 IVISOHUIHI ll 59 9 0091 SININITI SNILV3H SNOI1VUn913NOO 9NISNOH 13305 9NISH3A3H HOLIMS l g T 2 52 Bj T AOSZ 02 438 YOLOW AMANOS aa i 30 15 SYILVIH AVI GM 2 HOLLIVAYO 12 NMOG 7009 3 LUVIS AVT3Y ZH HOLIMS 3 155384 HIV SdY amp TT LE llt 28 PR m 1002 DON dI 1122 C HOLIAS BOA di 6S 101390 3583A34 OL T e e 23 e 52 PTT i 4 e 00 e uo 9 5 L Express Service Manual Domestic 10 DIAGRAM MODEL 1130 08H A 1131 08H A S N 0809210000016 AND BELOW ONISIM NTYN L10A IH G74 2 O HO LHM NYS NJAO AYY Iy 100 01 18 YOLO
19. N EN E Qo 432 N39 SYIGNNN 39 00 NYJ 9811002 3010M PA N BH3HHO JSNYMI INX NJAO UOLON TH INI JNAYM 1903 SIIONIN OZ dINIL 01 LINOVH N OUP ESPOMPO1 SDIAISSPOO M 3481 5 YOSNIS 121141 V1 H SH 5 fon CIEI NJAO LIMIT HDIH IVISONHJHL 21 524 9 S1N3W313 ONILVIH 70 1 13 2 ONISNOH 134205 3 Y 9NI1002 XO8 TONINO LYLSOWNIHL 11 YOI 8O10H NYJ ISAJ 2111 5 62 Z 03 91154318 YOAFANO HDLIMS ZS NJAO lO81NO2 NOD lt v 31804 HIN HOLIMS 15 YOLON YOAJANOD 9011 29897 22 a ds SHILIYIH AVI Y SL WOLIOVdVO 19 d NMOG 1002 18 15 NINO Av 138 2 11 5 18055144 819 Sdy goo gef 42018 0 OLED ONIYIM 18383113 ONTLYIH 93404 NOI1 1504 IX3N 01 25 i 5 4OX3JANOD 40 HOILO3HIQ 3S83A38 310N A807 n18 91 939000 3971 10A 13S JION j 11 Impinger Express Service Manual Domestic DIAGRAM MODEL 1132 08 1133 08H A S N 0809210000016 AND BELOW 43810 31 1 gt i 11002 9000 JOVINVAGY 11 YIONI HI lOH1NOO HINYOISNYYL a in M YldnOOOMN3HI 21 13NOVM VNVIGNI JNAVM 14304 NY4 9N11002 1YISONNJHI 21 AS di N LIMIT 1H NJAO 0 31 11 5 35 193413 SH SPPE OIA LOS Poo ONISUIATY HOAFANOD HOLIMS
20. OWER SUPPLY CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE AUTOMATIC COOL DOWN Impinger Il Express Service Manual Domestic Electrical power to be supplied to the oven by a three conductor service for single phase and a four conductor service for three phase Black conductor is hot Red conductor is hot Orange conductor is hot used for three phase only Green conductor is ground When the temperature in the control box reaches 120 F 3 48 9 1 7 the cooling fan thermostat will switch power to the control box cooling fans The thermostat will interrupt power to the cooling fans when the control box temperature falls to 100 F 3 37 8 C 1 7 Power is permanently supplied through the 10 amp fuses through the normally closed oven cavity hi limit thermostat to the normally open main power switch Power is also supplied to the normally open cooling fan thermostat Closing the main power switch energizes the coil of the cool down timer relay its contacts close enabling the 20 minute time delay relay The 20 minute time delay relay supplies 208 240VAC to the oven fan relay these normally open contacts now close supplying 208 240 VAC to the main fan motor 208 240VAC is also supplied to the cooling fans 208 240 VAC is supplied to the primary of the control transformer the conveyor motor and through the air pressure switch to the oven control Closing the main power switc
21. S ivisonsani TI AVI 3514 NOTlYH0913N09 15 GH3lY3H AVIN H OW S MOLIOYdYO 12 I NMOQ 71002 3 5 NJAO AVI3H ZH HOLIMS 3 15563 4 HIV SdV I I Tc M T LLI lll T P asl NOILISOd 01 25 i e THOITRS 40 EL c amp gt WOTIIOSHIG OI 3 zm e za e 82 OE 6 E CN rd 11 o BS 28 ED 77 5 z Nex 21 0 3 hove opt Fort dI za B Wane TION 138 Sion 1 2 9 Express Service Manual Domestic DIAGRAM MODEL 1161 080 S N 0809210000016 AND BELOW 9 11 du VNVIONI 3NAVM 1903 SNOTIVYNSTINOD 9NISNOH 144205 NOI1VMOS14NOO 15 NOTITSOd IXN 01 25 CHOLIMS HOASANOO 30 191 e TOULNOI W3MWOJSNYML SALONIN OZ AYO 11 01 A 21 NJAO LIWIT HOIH 1ViSOMH3HL 1 9N17009 1 LL YOAIANOI 10105 ZS Y3NOd NIVH HOLIMG 15 YOLOW NJAO AVI 18 MOASANOO 901004 9NI 1009 00 FH ZH NJAO HOLOM LN 1 YOGN3S 193443 TIVH SH 534 S 4009 SININITA ONILVSH VO
22. Service Manual Domestic New Model Number 1130 00z U Kxxxx 1131 00z U Kxxxx 1178 00z U Kxxxx UM 35 36 CONTROL BOX REAR Number gt eo TT oaoa 1 1 1 1 1 gt a 1 h SA as Capacitor conveyor motor S N 2052463 amp above 392 Gonwolboxcover rear Fuse OA U 3 jou Impinger Express Service Manual Domestic CONTROL BOX VIEW gt mews ross Express Service Manual Domestic 37 38 CONTROL BOX REAR 7 o meses SO Jo O masoara gt ascot mewa NA gt TITTI Relay Main S N 0809210000016 amp below 5 _ Relay Main S N 0809210000017 8 above Mercury contactor 3 pole 3 Phase 08 model only TTT grass 20 0 30066 P omg G OM R J 33 Electrical Box o Impinger Express Service Manual Domestic CONTROL BOX VIEW
23. TH POWER OFF Check for opens shorts or grounds Turn fan blade to check for locked rotor ines Check for shorts or grounds WARNING Capacitor has a stored charge discharge before testing control box cooling Incoming power Check circuit breakers reset if required Check power plug to be sure it is firmly in receptacle Measure incoming power call power co if needed E ee To switch as needed Cooling fan Check for 120VAC at cooling fan If no voltage is present trace wiring back to power switch If voltage is present and motor does not run check for opens shorts or grounds WITH POWER OFF Check for locked rotor No automatic control box Incoming power supply Check circuit breakers reset if required Check cooling power plug to be sure it is firmly in receptacle Measure incoming power call power co if needed Cooling fan thermostat Check the cooling fan thermostat Thermostat closes at 120 F and opens at 100 F With the cooling fan thermostat pre heated check for continuity If switch is open replace cooling fan thermostat Cooling fan Check for 120VAC at cooling fan If no voltage is present trace wiring back to cooling fan thermostat If voltage is present and motor does not run check for opens shorts or grounds WITH POWER OFF Check for locked rotor Oven will not heat Gas supply Check for adequate gas supply to oven gas shut off valve Check to see that the manual gas shut off valve is
24. arch 16 2009 Parts are not compatible between old and new stand styles See Addendum in the back of this manual for a parts breakdown and assembly instructions Impinger Express Service Manual Domestic GENERAL VIEW 31 Impinger Express Service Manual Domestic 32 CONTROL BOX FRONT Old Number New Modei Number mona 1197 080 or Al 0 ee e aem TT Stand off Plate SN 0903210000317 amp Below This pertains to all non TU units 1 1 1 1 1 Express Service Manual Domestic CONTROL BOX FRONT VIEW Su 2 E 2 gt d Model Number 6 00z U Kxxxx 6 00z U Kxxxx 6 062 8R 6 00z U Kxxxx 7 00z U Kxxxx 7 00z U Kxxxx 33 Impinger Express Service Manual Domestic CONTROL BOX FRONT New Model Number 1130 00z U Kxxxx A eroe TT asce gt arts Relay Oven Start S N 0809210000016 amp below Relay Oven Start S N 0809210000017 amp above Stand off Support SN 0903210000318 amp Above This pertains to all non TU units 131 1 Express Service Manual Domestic CONTROL BOX FRONT VIEW N A Express
25. ars to the Front Back Assemblies and tighten using the 1 34 Hexagon Bolts B Washers E and Acorn Nuts D provided Two sets each of the bolts washers and nuts are to be used at each intersection of Stand Side Bars and Front Back Assemblies for a total of 16 sets Select Caster or Adjustable Leg and screw into nutsert in the bottom corner of each Front Back Stand Assembly Tighten Casters securely Set assembled Stand on casters legs in an open clear area and lock casters as applicable in preparation for mounting oven on stand When placing the oven on the stand align the bolt holes located in the Front Back Stand Assemblies with the holes located in the bottom of the oven With holes in alignment insert the 2 5 Hexagon Bolts and tighten to secure the oven to Stand Fig 2 CAUTION USE EXTREME CARE IN STEP 5 TO INSURE OVEN DOESN T SLIP OFF STAND BEFORE BOLTS HAVE SECURED OVEN TO STAND HARDWARE PROVIDED FOR STAND ASSEMBLY LETTER PART DESCRIPTION Front Back Stand Assemblies 0001S1SP__ Hexagon Bolt 2 Washer Stand Side Bar NotShown Adjustable Leg for 1127 1 stand Not Shown 9002533 Shelf for 1127 1 stand NotShon Hexagon Bolt 1 2 for double stack oven configuration 46 Impinger Il Express Service Manual Domestic This page intentionally blank Impinger Express Service Manual Domestic 47 TA e Lincoln X Cami OWOC STAR CERTIFIE SERVICE AND PARTS
26. assemble in reverse order and check system operation BURNER BLOWER MOTOR REPLACEMENT MILO OE Shut off power at main breaker Remove rear control box cover Unplug motor connector Remove three mounting screws from blower tube at burner housing Remove air shutter assembly from old motor for assembly on new motor Reassemble in reverse order and check system operation NOTE Check air shutter at approximately 1 2 open and adjust to get a blue flame with an occasional tip of yellow under high flame A view port in the burner assembly should be used to observe flame HI LIMIT THERMOSTAT OVEN CAVITY REPLACEMENT Wo ORE Shut off power at main breaker Remove conveyor and bottom finger assembly Remove rear control box cover Remove capillary bulb from bracket in oven chamber and pull capillary tube through tube into control box Remove all wires and mark for reassembly Remove mounting nut and remove thermostat Impinger Il Express Service Manual Domestic F Reassemble reverse order and check system operation sure capillary tube is securely the mount NOTE Push reset button on new thermostat TRANSFORMER BURNER REPLACEMENT Shut off power at main breaker Remove conveyor and front control box cover Remove all wires from transformer and mark for reassembly Remove two mounting screws from transformer base and remove transformer Reassemble in reverse order and check system operation
27. ceed Oven control If the hall effect sensor readings are correct but there is no speed indicated on the display replace the oven control REMOVAL INSTALLATION AND ADJUSTMENTS IMPINGER ADVANTAGE SERIES CAUTION BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER OVEN BE SURE TO DISCONNECT ELECTRICAL POWER AND GAS SUPPLY MAIN FAN REPLACEMENT Shut off power at main breaker Remove motor cover from back of oven Disconnect wiring and mark for reassembly Remove bolts and slide back straight out of the oven Loosen the bolt from fan hub and remove fan from motor shaft NOTE Measure distance from fan blade to rear wall assembly before removal to aid in reassembly F Reassemble in reverse order and check system operation moon FAN SPIDER NOTE MEASUREMENT MUST ka MADE FROM CONE TO FAN SPIDER FAN HUB 1 1 2 INCH MOTOR MAIN FAN REPLACEMENT Shut off power at main breaker Remove motor cover from back of oven Disconnect wiring and mark for reassembly Remove bolts and slide back straight out of the oven Loosen the bolt from fan hub and remove fan from motor OTE Measure distance from the fan blade to rear wall assembly before removal to aid in reassembly Remove four screws from motor support assembly Remove motor mount clamp and remove motor from oven back Remove motor mount from motor Reassemble in reverse order and check system operation
28. control box cover Disconnect all wires and mark for reassembly Remove screws from mounting bracket and remove contactor Reassemble in reverse order and check system operation HEATING ELEMENT REPLACEMENT gt Shut off power main breaker Remove back cover Disconnect heating element wires and mark for reassembly Disconnect motor wiring and mark for reassembly Remove oven back from oven Remove fan shroud Heating element may now be unbolted and removed Check new heating element for proper voltage Reassemble in reverse order and check for proper operation Impinger Express Service Manual Domestic This page intentionally blank Impinger Express Service Manual Domestic 29 30 GENERAL VIEW New Model Number mewa gt meses S O o mess o masoara gt S S meroa e eo S TTI LETTER PART NUMBER DESCRIPTION Caster 4 w mounting plate O Oven Door See Door View Section 3952 Bottom finger cove Top finger housing model ending with 080 A Top finger housing model ending with 080 A1 Top finger cover model ending with 080 1 e manual A new stand was designed and implemented on M
29. d WITH POWER ON AND THERMOCOUPLE ATTACHED TO THE OVEN CONTROL Measure the DC millivolt output of the thermocouple Refer to the thermocouple chart located in the Removal section of the manual for proper millivolt readings If these readings are not achieved replace thermocouple If the thermocouple checks good but there is no voltage output to the mercury contactor replace the oven control If there is voltage output to the mercury contactor proceed Check for supply voltage to the contactor coil If voltage is present and the contactor will not activate replace the mercury contactor Also check each contactor for high voltage input and output Check the Amp draw on each power leg for proper load Check the specification plate for rating information If the amp draw is high or low check the individual elements for opens shorts and proper resistance WITH POWER OFF To check resistance of the elements remove all leads from the elements and use a digital multimeter The element resistance is should be as follows 208V 27 ohms approx 240V 36 ohms approx Replace heating elements as needed Oven 5 with switch off Mercury contactor The mercury contactor has probably failed in the closed position If there is no voltage to the operating coil but there is high voltage at the contactor output replace the mercury contactor Intermittent heating Thermal overload of motor The main fan motor is equipped w
30. e Check for 120VAC supplied to temperature regulation valve If voltage is present listen for valve to open and close Also check for opens or shorts in the operating coil Replace temperature regulation valve as needed Intermittent heating Thermal overload of main fan The main fan motor and burner blower motor are and burner blower motors equipped with internal thermal protection and will cease to operate if overheating occurs As the motors overheat and then cool this will cause the heating system to cycle on and off intermittently Improper ventilation or lack of preventive maintenance may cause this problem Also most of the problems listed under Oven will not heat can cause intermittent failure Conveyor will not run Power supply Check for incoming voltage at line 1 to neutral There should be a reading of 120VAC If not present check circuit breakers Fuse 10 Check replace if necessary Fuse holder Check replace if necessary Hi limit thermostat control box Check for voltage on both sides of switch Terminals are normally closed If open reset and test oven for proper operation If thermostat will not hold and control box temperature is not exceeding 140 F 60 replace thermostat Power switch nei continuity between switch terminals Replace switch as needed Control transformer Check for 120 VAC supply to the primary of the control transformer If no voltage is present trace wirin
31. for proper rating MANIFOLD ADJUSTMENT 44 amp SCREW LOCATED UNDER COVER SCREW TEMPERATURE REGULATION VALVE REPLACEMENT oQmmoomr Shut off power at main breaker Shut off gas supply to the oven and disconnect the flexible gas line to oven Remove rear control box cover Hemove bypass tube from burner manifold Remove wiring from valve and mark for reassembly Remove four mounting nuts from burner manifold and disconnect pipe union Remove temperature regulation valve and piping from oven HOT SURFACE IGNITER REPLACEMENT gt Shut off power main breaker Shut off gas supply to the oven and disconnect the flexible gas line to oven Remove conveyor and control box covers Remove temperature regulation valve See TEMPERATURE REGULATION VALVE Disconnect wires from burner control Remove three mounting screws and remove burner venturi Remove mounting nut and remove hot surface igniter assembly Reassemble in reverse order and check system operation Check all gas line fittings for leaks Impinger Express Service Manual Domestic BYPASS ORIFICE REPLACEMENT Shut off power at main breaker Shut off gas supply to the oven and disconnect the flexible gas line to oven Remove rear control box cover Disconnect bypass tube from gas valve Remove bypass orifice from gas valve Reassemble in reverse order and check system operation Check all gas line fittings for leaks
32. g back to the oven power relay If voltage is present check for 24 VAC at the transformer secondary If there is primary voltage but no secondary voltage replace control transformer Conveyor motor Check for 120 VAC supply to the conveyor motor at wire 14 to neutral If no voltage is present trace wiring back to the primary of the control transformer If voltage is present and the motor will not run check the motor windings for opens or shorts WITH POWER OFF Check the motor windings as follows Grey to black 380 approx Grey to blue 380 approx Blue to black 750 approx Impinger Il Express Service Manual Domestic 17 of the above fails replace conveyor motor Capacitor conveyor motor Check for shorts or grounds Replace capacitor as needed WARNING Capacitor has a stored charge discharge before testing Switch conveyor reversing Check continuity between switch terminals Replace switch as needed Oven control If there is 120VAC supplied to the motor and the motor capacitor and reversing switch check good replace the oven control Conveyor motor runs but NOTE Display will indicate there is no speed display Belt Jam Oven control Check for output voltage from oven control to hall effect sensor sensor is located in conveyor motor Measure voltage at the motor connector red wire and yellow wire Voltage should be approx 10VDC If no voltage is present trace wiring back to oven co
33. ground When the temperature in the control box reaches 120 F 3 48 9 1 7 the cooling fan thermostat will switch power to the control box cooling fans The thermostat will interrupt power to the cooling fans when the control box temperature falls to 100 F 3 37 8 C 1 7 Power is permanently supplied through the 10 amp fuses through the normally closed oven cavity hi limit thermostat to the normally open main power switch Power is also supplied to the normally open cooling fan thermostat Closing the main power switch energizes the coil of the oven start relay it s contacts close enabling the 20 minute time delay relay The 20 minute time delay relay supplies 120VAC to the oven fan relay these normally open contacts now close supplying 208 240VAC to the main fan motor 120VAC is also supplied to the cooling fans 208 240VAC is supplied to the primary of the control transformer the conveyor motor and through the air pressure switch to the oven control Closing the main power switch supplies 208 240VAC to the primary of the control transformer Secondary voltage 24VAC is supplied to the oven control The oven control is set to desired temperature The thermocouple will provide varying millivolts to the oven control The oven control supplies 208 240VAC to the coil of the heater relay at intermittent intervals to maintain the desired temperature The display on the oven control will indicate when the heater relay is energized
34. h supplies 208 240VAC to the primary of the control transformer Secondary voltage 24VAC is supplied to the oven control The oven control is set to desired temperature The thermocouple will provide varying millivolts to the oven control The oven control supplies 208 240VAC to the coil of the heater relay at intermittent intervals to maintain the desired temperature The display on the oven control will indicate when the heater relay is energized NOTE The display also indicates oven temperature Closing the main power switch supplies 208 240VAC to the conveyor motor and to the primary of the control transformer Secondary voltage 24VAC is supplied to the oven control Setting the oven control to the desired time outputs voltage through a reversing switch to the conveyor motor NOTE The conveyor system uses a hall effect sensor and magnet to prove operation of the conveyor motor If the conveyor motor is not running BELT is indicated on the display When the oven is started the time delay relay timing circuit is enabled permitting the oven fans to run approximately 20 minutes after the oven is shut off to cool the oven The time delay relay will keep the coil of the fan relay closed maintaining operation of the main fan and cooling fans SCHEMATIC DIAGRAM MODEL 1116 080 A 1116 080 A1 1117 080 A 1117 080 A1 12979082 _ 9N11009 0104 EWTN SHINN SHIM XX NIVH 0104 000 39VINVAQV
35. ignition control Closing the main power switch supplies 120VAC to the burner blower motor 120VAC is also supplied through the main fan centrifugal switch this switch closes when the main fan reaches approx 1600 RPM and the normally closed oven cavity hi limit thermostat to the primary of the burner transformer 120VAC is also supplied to the oven control The ignition control operates on both 24VAC and 120VAC When the control is energized by 24VAC from the transformer 120VAC is switched by the ignition control to the hot surface igniter for 45 seconds for the hot surface igniter warm up The igniter glows red 24VAC is switched to the gas valve which opens and ignition should now occur Closing the main power switch supplies 120VAC to the primary of the oven control transformer Secondary voltage 24VAC is supplied to the oven control The oven control is set to desired temperature The thermocouple will provide varying millivolts to the oven control The oven control supplies 120VAC to the temperature regulation valve at intermittent intervals to maintain the desired temperature The display on the oven control will indicate when the temperature regulation valve is energized NOTE The display also indicates oven temperature Closing the main power switch supplies 120VAC to the conveyor motor and to the primary of the control transformer Secondary voltage 24VAC is supplied to the oven control Setting the oven control to the desired t
36. ime outputs voltage through a reversing switch to the conveyor motor NOTE The conveyor system uses a hall effect sensor and magnet to prove operation of the conveyor motor If the conveyor motor is not running BELT is indicated on the display Impinger Express Service Manual Domestic 3 SEQUENCE OF OPERATION IMPINGER Il ADVANTAGE ELECTRIC S N 0809210000016 amp BELOW OVENS WITH PUSH BUTTON CONTROLS Model Number gt New Model Number Voltage He Phase gt 120208 1 mowa gt MA erat SH 3 moma gt MA 2 SH 3 200 3 Olje 1132002 gt 206 _ gt 206 asoa oran gt 3 mena 240 eroa To Se 1 120208 POWER SUPPLY CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE AUTOMATIC COOL DOWN O O GO O O CO Electrical power to be supplied to the oven by a three conductor service for single phase and a four conductor service for three phase Black conductor is hot Red conductor is hot Orange conductor is hot used for three phase only White conductor is neutral Green conductor is
37. ith internal thermal protection and will cease to operate if overheating occurs As the motor overheats and then cools this will cause the oven to cycle on and off intermittently Improper ventilation or lack of preventive maintenance may cause this Also most of the problems listed under Oven will not heat can cause intermittent failure Conveyor will not run Power supply Check circuit breakers reset if required Check power plug to be sure it is firmly in receptacle Measure incoming power call power co if needed Hi limit thermostat oven cavity Terminals are normally closed If open reset thermostat and retest If thermostat will not hold for maximum oven temperature and oven is not exceeding temperature setting check for proper location of capillary bulb in its spring holder If the capillary checks okay replace the hi limit thermostat Power switch Check continuity between switch terminals Replace switch as needed Control transformer Check for supply voltage to the primary of the control transformer If no voltage is present trace wiring back to the oven power relay If voltage is present check for 24 VAC at the transformer secondary If there is primary voltage but no secondary voltage replace control transformer Conveyor motor Check for supply voltage to the conveyor motor If no voltage is present trace wiring back to the primary of the control transformer If voltage is present and
38. k for pull in of relay contacts Replace relay as needed 20 minute time delay Check for 208 or 240VAC at terminal 1 to L2 on time delay relay If voltage is not present trace wiring back to 10A fuse If voltage is present at terminal 1 check for 208 240VAC at terminal 2 to L2 If no voltage is present and oven start relay is Closed replace 20 minute time delay relay Relay main fan Check for 208 or 240VAC to coil of main fan relay If no voltage is present trace wiring back to 20 minute time delay relay If voltage is present check to insure that relay contacts are closing Replace relay as needed Main fan motor Check for supply voltage at motor If no voltage is present trace wiring back to main fan relay grounds Turn fan blade to check for locked rotor Capacitor Check for shorts or grounds WARNING Capacitor has a stored charge discharge before testing No main fan cool down 20 Minute time delay Check for 208 or 240VAC at terminal 2 to neutral while the oven is on Turn off the main switch 208 or 240VAC should continue to be present for 20 minutes If voltage is not present for approx 20 Express Service Manual Domestic 19 x x minutes replace the 20 minute time delay Oven fan relay Check for 208 or 240VAC to relay coil if no voltage is present trace wiring back to 20 minute time delay If voltage is present be sure that relay contacts stay closes during the 20 minute
39. n U 38925 Window frame bottom NLA See Access Door Section TW 36999 Retainer window See Access Door Seaton X 869168 Spice cip conveyorbet _ Conveyor belt complete Regular Conveyor Conveyor Belt 1 Foot Section Heavy Duty Conveyor Complete Conveyor Assembly includes letters A G J K L M X and Y c x S C H W Impinger Il Express Service Manual Domestic CONVEYOR DOOR VIEW ALL MODELS Impinger Il Express Service Manual Domestic 43 44 ACCESS DOOR ALL MODELS SN 0908210000875 AND BELOW 969110 Access Door Assembly B 496998 Dowel Access Door D gG075 Dowel Thread O M X M Express Service Manual Domestic STAINLESS STEEL ACCESS DOOR ALL MODELS SN 0908210000875 AND ABOVE 8 32 x 3 8 Hx Serr Fing Bracket Assembly Right Dowel Thread Access Door Frame top or bottom Glass Impinger Express Service Manual Domestic 45 ADDENDUM NEW STYLE OVEN STAND BEGINNING 16 2009 1 Insert the four Stand Side Bars C into the four holes located on each of the Front Back Assemblies A Note The Stand Side Bar that contains labels should be facing out so that the labels can be easily read by the operator 2 Attach the Stand Side B
40. ntrol If there is no voltage present at the oven control replace the oven control Conveyor motor If there is voltage supplied to the hall effect sensor check for a frequency output from the hall effect sensor Measure frequency across the yellow and white wires at the motor connector Frequency reading should be approx 25 100 Hz If these readings are not achieved replace conveyor motor If the readings are achieved proceed Oven control If the hall effect sensor readings are correct but there is no speed indicated on the display replace the oven control 18 Impinger Express Service Manual Domestic TROUBLESHOOTING GUIDE ELECTRIC OVENS Old Modei Number New Model Number Vonage Hz Phase SYMPTOM POSSIBLE CAUSE EVALUATION power co if needed controls Fuse holder Check replace if necessary Hi limit thermostat Terminals are normally closed If open reset Oven cavity thermostat and retest If thermostat will not hold for maximum oven temperature and oven is not exceeding temperature setting check for proper location of capillary bulb in its spring holder If the capillary checks okay replace the hi limit thermostat Switch main power Check continuity between switch terminals Replace switch as needed Relay oven start Check for 208 or 240VAC supplied to coil of relay If no voltage is present trace wiring back to main power switch If voltage is present chec
41. ocouple from bracket in oven chamber and pull thermocouple through tube into control box Remove two thermocouple wires from temperature control Note wire color and location for reassembly F Reassemble in reverse order and check system operation com THERMOCOUPLE MEASUREMENT TEMPERATURE F D C MILLIVOLTS 200 2 8 250 4 0 300 5 1 350 6 0 400 7 1 450 8 2 500 9 3 550 10 4 600 11 5 Impinger Il Express Service Manual Domestic 25 26 BURNER CONTROL REPLACEMENT mootug Shut off power at main breaker Hemove conveyor and front control box cover Hemove wires from control and mark for reassembly Hemove mounting screws from control and remove burner control Reassemble in reverse order and check system operation GAS VALVE REPLACEMENT UI QnmuootUug Shut off power at main breaker Shut off gas supply to the oven and disconnect the flexible gas line to oven Remove rear control box cover Remove the manual gas shut off valve Hemove screws from the bulkhead plate on inlet gas pipe and remove inlet gas pipe Remove pilot tube and wiring from gas valve Mark all wiring for reassembly Disconnect pipe union in gas line and remove gas valve and piping assembly Remove piping from gas valve Reassemble in reverse order and check system operation Check all gas line fitting for leaks Adjust the gas manifold pressure on the gas valve Refer to the specification plate on the oven
42. oltage output at the oven control check the read out on the control If the control reads PROBE FAIL this indicates that the thermocouple has failed or become disconnected from the oven control Thermocouple Check to be sure that the thermocouple is securely connected to the oven control If the thermocouple is connected to the oven control and the control indicates PROBE FAIL disconnect the thermocouple from the oven control and measure the resistance of the thermocouple The thermocouple should read approx 110 If these readings are not 16 Impinger Il Express Service Manual Domestic achieved replace the thermocouple If these readings are correct proceed Oven control If the thermocouple checks good but the oven control display indicates that there is a thermocouple failure replace the oven control If the oven control indicates a temperature reading but the oven won t heat proceed Thermocouple WITH POWER ON AND THERMOCOUPLE ATTACHED TO THE OVEN CONTROL Measure the DC millivolt output of the thermocouple Refer to the thermocouple chart located in the Removal section of the manual for proper millivolt readings If these readings are not achieved replace thermocouple Oven control If the thermocouple checks good but there is no 120VAC output to the temperature regulation valve replace the oven control If there is 120VAC output to the temperature regulation valve proceed Temperature regulation valv
43. ove mounting screw and remove capacitor Reassemble in reverse order and check system operation AIR PRESSURE SWITCH REPLACEMENT Shut off power at main breaker Remove conveyor and front control box cover Disconnect wiring from air pressure switch and mark for reassembly Disconnect air tube from air pressure switch Remove two mounting screws and remove air pressure switch Reassemble in reverse order and check system operation Be sure to calibrate new air pressure switch For proper calibration see below U C Impinger Express Service Manual Domestic 27 28 RETIP Turn adjusting Screw on air pressure switch fully counter clockwise Turn oven on Turn adjusting Screw on air pressure switch clockwise until heat shuts off Turn adjusting screw on air pressure switch counter clockwise 14 turn Reassemble control panel top and front cover BEARING CONVEYOR REPLACEMENT WS Remove conveyor from oven and place on a flat work surface Remove connecting links from conveyor belt See Installation Operations manual for proper procedure Remove conveyor belt from conveyor Move drive shaft or idler shaft toward end of conveyor and shaft with bearing will now slip out of conveyor frame Remove bearing from conveyor shaft Reassemble in reverse order and check system operation MERCURY CONTACTOR REPLACEMENT Ime O ID gt Shut off power at main breaker Remove rear
44. rrent but the flame will not stay lit check for proper polarity of the 120VAC power supply Ignition control If there is sufficient microamp current and the 120VAC polarity is correct but the flame will not stay lit replace the ignition control NOTE Check for proper ground connection on ignition control NOTE Flame should be on at this time Low flame is on Control transformer but no main flame Check for 120VAC supply to the primary of the control transformer If no voltage is present trace wiring back to the main power switch If voltage is present check for 24VAC at the transformer secondary If there is primary voltage but no secondary voltage replace the control transformer Oven control Check for 24VAC supply to control If no voltage is present trace wiring back to control transformer If 24VAC is present check for a read out on the display If there is 24VAC supplied but there is no read out on the control display replace the oven control If there is a read out on the control set the control to maximum temperature see installation operations manual for temperature adjustment With the control set at maximum temperature check for 120VAC at the temperature regulation valve If there is voltage at the temperature regulation valve proceed to Temperature regulation valve for next check If there is no voltage at the temperature regulation valve trace wiring back to the oven control If there is no v
45. the motor will not run check the motor windings for opens or shorts WITH POWER OFF Check the motor windings as follows Grey to black 2400 approx Grey totan 2400 approx Tan to black 4800 approx If any of the above fails replace conveyor motor Capacitor conveyor motor Check for shorts or grounds Replace capacitor as needed WARNING Capacitor has a stored charge discharge before testing Check continuity between switch terminals Replace switch as needed Oven control If there is supply voltage to the motor and the motor capacitor and reversing switch check good replace the oven control NOTE Display will indicate there is no speed display Belt Jam Oven control Check for output voltage from oven control to hall effect sensor sensor is located in conveyor motor Measure voltage at the motor connector 22 Impinger Express Service Manual Domestic red wire and yellow wire Voltage should be approx 10VDC If no voltage is present trace wiring back to oven control If there is no voltage present at the oven control replace the oven control Conveyor motor If there is voltage supplied to the hall effect sensor check for a frequency output from the hall effect sensor Measure frequency across the yellow and white wires at the motor connector Frequency reading should be approx 25 100 Hz If these readings are not achieved replace conveyor motor If the readings are achieved pro
46. to control transformer If 24VAC is present check for a read out on the display If there is 24VAC supplied but there is no read out on the control display replace the oven control If there is a read out on the control set the control to maximum temperature see installation operations manual for temperature adjustment With the control set at maximum temperature check for supply voltage at mercury contactor If there is voltage at the mercury contactor proceed to mercury contactor for next check If there is no voltage at the mercury contactor trace wiring back to the oven control If there is no voltage output at the oven control check the read out on the control If the control reads PROBE FAIL this indicates that the thermocouple has failed or become disconnected from the oven control Check to be sure that the thermocouple is securely connected to the oven control If the thermocouple is connected to the oven control and the control indicates PROBE FAIL disconnect the thermocouple from the oven control and measure the resistance of the thermocouple The thermocouple should read approx 110 If these readings are not achieved replace the thermocouple If these readings are correct proceed If the thermocouple checks good but the oven control display indicates that there is a thermocouple failure replace the oven control If the oven control indicates a temperature reading but the oven will not heat procee
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