TROUBLESHOOTING MANUAL
Contents
1. IMPORTANT FOR FUTURE REFERENCE m e ormati tion and retain this mplete this nalivi the life of tho Model Serial Date Purchased 14R amp 18 WKS KENTUCKY FRIED CHICKEN EQUIPPED WITH A FAST COOKING COMPUTER EM99 or VC210 FRONT PANEL SUPPLIED BY PITCO TROUBLESHOOTING MANUAL PITCO FRIALATOR INC P O BOX 501 CONCORD N H 03301 PHONE 603 225 6684 SERVICE DEPT 603 225 5688 L20 310 rev 0 04 07 SERVICE MANUAL 14R 8 18 WKS KENTUCKY FRIED CHICKEN CONTENTS Section 1S Service Procedures Burner Flow Drawing Section 2S Troubleshooting Charts Section 3S Parts List Section 4S Front Panel Bezel Orifice Tips Burner Pressure Section 5S Entrance Box 120 310 REVO 04 07 Pitco Frialator Inc P O Box 501 Concord New Hampshire SECTION 15 SERVICE PROCEDURES Parts can be identified from diagrams on Parts List page for each model TO REMOVE MAIN BURNER 1 1 1 2 1 3 1 4 1 5 a b f Turn Unitrol knob to OFF position Loosen set screw in base of burner casting Unscrew and remove two hex head screws at top of burner Unscrew and remove air collar from burner Lift burner up to clear top of burner fitting and remove from fryer Reverse procedure to remount burner TO CHANGE MAIN BURNER ORIFICE a b d Follow procedure in Section 1 1 After burner has been removed unscrew orifice with 3 8 wrench Screw2. INSUFFICIENT GAS PRESSURE 1 Have Gas Company check incoming gas pressure 2 Adiust regulator to gas pressure snown on lirst page Remove pres sure regulator screw figure 8 Using ascrewanver with a 5 16 max blade tum screw Clockwise to increase gas Pressure PRESSURE REGULATOR Knob is designed to CAP SCREW LOCATION fail before valve stem To prevent valve failure PILOT CAP SCREW LOCATION NORMAL PILOT FLAME As stated in figure 7 the normal pilot flame will generate a mili voltage ot 300 to 500 mv PITCO Frialator Inc P O Box 501 Concord New Hampshire 03301 SECTION 2S TROUBLESHOOTING CHART TROUBLE POSSIBLE CAUSE REMEDY Pilot will light but Unitrol pilot gas valve will not hold open automatically Pilot thermopile or thermocouple not hot enough to generate reguired millivoltage Loose wire connection in millivoltage circuit Thermopile or thermocouple producing insufficient millivoltage High limit control may have cut out Pilot flame too small Pilot flame burning yellow 7 Draft may be pulling flame off thermopile or thermocouple 8 Gas pressure too low Hold Unitrol knob in PILOT position depressed for 1 minute or longer Make sure all air has been purged from gas line Check all wire connections Check voltage at Unitrol with millivoltmeter holding pilot flame on manually as in No 1 above Reading should be 500 50 mv for thermopile
3. Replace with new thermopile or thermocouple Reverse procedure to re assemble Tighten all screws and connections and test for gas leaks 1 7 TO ADJUST PILOT FLAME a b C Make this adjustment with pilot burner lit Remove screw cap underneath pilot supply tubing connection to Unitrol valve Insert long handled screwdriver with 1 8 wide blade in adjusting screw slot inside this pilot supply fitting Turn adjusting screw clockwise to decrease or counterclockwise to increase pilot flame Watch size of pilot flame while turning adjusting screw CAUTION DO NOT REMOVE ADJUSTING SCREW Replace screw cap when desired flame size is obtained Replace pilot orifice if desired flame cannot be obtained by adjustment See procedure 1 5 1 8 TO REPLACE LIMIT CONTROL a e Turn Unitrol knob to OFF Drain all shortening from fry tank Remove tube screen Unscrew and remove the two screws in the limit bulb clamp on the heat tube inside the fry tank Take sensing bulb out of the clamp and straighten the capillary tubing Remove the two burners that are in front of the capillary connector fitting on the bottom of the fry pot See procedure 1 1 Unscrew small hex nut in connector fitting of control to be replaced Unscrew large connector nut and withdraw capillary and bulb from fry tank Remove the two wires off the limit control terminals Unscrew and remove the two mounting screws in the limit control bracket and remove
4. Domestic International Operational Information BURNER MIN INLET in WC in WC NOTES SECTION 4S FRONT PANEL BEZEL ASSEMBLY MODEL 14R 8 18 WKS Back View of Front Panel Bezel Assembly Schematic Pan ITEM DESCRIPTION Symbol Number See Schematic 700131 Schemaic 3 Switch On Off PP11124 Relay 24V SPDT DC P5046686 Relay 24V DPDT AC B6711702 Not Shown 756711703 Hamess DVI drain switch Contact FAST for Fast Computer EM99 Computer Type Not Shown Replacement East Computer VC210 SECTION 4S FRONT PANEL BEZEL SCHEMATIC MODEL 14R 8 18 WKS SECTION 4S FRONT PANEL BEZEL SCHEMATIC MODEL 14R 8 18 WKS Item Number Part Number Description B2904502 Entrance Box 115V B2904504 Entrance Box 220 240V P5045794 Fuseholder PP10122 1 Amp Fuse 115V P5045717 2 Amp Fuse 220 240V See Note 1 P5045794 Fuseholder PP10122 1 Amp Fuse 115V 4 PP10210 40VA Transformer 5 B6713901 Wire Harness 115V B6713902 Wire Harness 220 240V NOTE 1 ITEM 3 NOT USED ON 220 240V MODELS SECTION 5S ENTRANCE BOX ASSEMBLY MODEL 14R 8 18 WKS ENTRANCE BOX SCHEMATIC OF 700131 SECTION 5S ENTRANCE BOX ASSEMBLY MODEL 14R 8 18 WKS ENTRANCE BOX SCHEMATIC OF 700131 L20 310 rev 0 04 07
5. in new orifice tighten gas tight Remount burner and air collar TO REPLACE HEAT TUBE BAFFLES a b Remove main burners follow procedure in Section 1 1 a through Baffles are fastened to the inside of the heat tube by a small tack weld on the right hand front baffle support Break leg away from weld with a chisel or solid steel bar Remove old baffles and insert new ones in tubes in original position Remount main burners TO REMOVE PILOT BURNER a Follow procedure in Section 1 1 and remove main burner to the right of the pilot burner Unscrew and remove tubing nut from pilot tubing connection on Unitrol Unscrew and remove thermopile or thermocouple from connection on Unitrol Unscrew and remove the two screws holding the pilot to the bracket on the fry tank and lift the entire pilot assembly out of the fryer TO CHANGE PILOT BURNER ORIFICE Follow procedure in 1 4 Unscrew tubing nut in fitting in base of pilot burner Unscrew fitting in the base of pilot burner and withdraw orifice from inside the fitting Insert new orifice and reverse procedure to re assemble Tighten all screws and connections and test for gas leaks Pitco Frialator Inc P O Box 501 Concord New Hampshire 03301 SECTION 15 SERVICE PROCEDURES Cont d 1 6 TO REPLACE THERMOPILE OR THERMOCOUPLE a b Follow procedure in 1 4 Unscrew and remove thermopile or thermocouple from pilot burner and bracket
6. learn proper sizes On natural gas adjust Unitrol pressure regulator to 4 0 w c operating pressure On propane gas have gas supplier adjust tank pressure to provide 10 0 w c operating pressure at the fryer See Orifice and Burner pressure chart Loosen burner mounting screws and line up burners Remove and clean cap Replace Unitrol Remove and clean cap Remove burners and clean On natural gas adjust Unitrol pressure regulator to 4 0 w c operating pressure On propane gas have gas supplier adjust tank pressure to provide 10 0 w c operating pressure at the fryer See Orifice and Burner pressure chart Call factory to learn proper sizes Adjust pressure regulator Clean orifice or replace NOTES SECTION 3S EXPLODED PARTSLIST MODEL 14R 8 18 WKS SECTION 3S EXPLODED PARTSLIST MODEL 14R 8 18 WKS Ae E 8 P6071269 gt 9 ContactFactory Data Plate O 31 Caster Swivel Non Locking Rear 37 8 Caster Leg Set Swivel Non Locking Rear SECTION 3S EXPLODED PARTS LIST MODEL 14R 8 18 WKS ORIFICE TIPS 8 BURNER PRESSURE 14R Natural 14R Propane ORIFICE TIP GAS Supply Pressure Governor on ORIFICE TIP CA AESOB SIZE mm CATEGORY Gas Valve SIZE mm l 4 E No 125 18 Propane ORIFICE TIP GAS Supply Pressure Governor on ORIFICE TIP Jam be bern besi 2 38 2 58 Y Y xr 37 Ye 50 Yes ia SE HAS 5 N es es No No No
7. Low gas pressure Incorrect burner orifices Carbon build up on heat tubes Baffles in heat tubes may be burned out Pilot flame too large Carbon build up on thermopile or thermocouple Replace thermopile or thermocouple Replace magnet Turn handle counter clockwise as far as it will go Install float switch bulb and new clip Check electric supply circuit Replace probe Replace Computer Replace Unitrol Minimum operating pressure Natural Gas 4 0 w c Propane Gas 10 0 w c Call factory to learn proper sizes Clean fry tank and tubes Replace baffles Adjust Unitrol pilot adjustment screw Remove and clean PITCO Frialator Inc P O Box 501 Concord New Hampshire 03301 SECTION 2S TROUBLESHOOTING CHART TROUBLE POSSIBLE CAUSE REMEDY Burner flames will not enter heat tubes Main burners will not shut off automatically Main burner flames are yellow Howling or screeching noise when burners are on Downdraft on fryer flue opening or vent not turned on Orifices may be incorrect size Gas pressure too high low Burners out of alignment Clogged vent cap on Unitrol Defective Unitrol Improper air collar adjustment Main burners dirty Improper gas pressure Orifices are too large Gas pressure too high Dirt or burr on burner orifice Protect flue opening from downdrafts breezes or air flows from blowers a Turn Vent on Call factory to
8. Reading should be between 25 and 35 mv for thermocouple Check continuity across limit control terminals with meter If limit control has cut off check at what temperature it cut off Check millivoltage as above increase size of flame with Unitrol pilot adjusting screw Remove and clean pilot and thermopile or thermocouple decrease size of flame with Unitrol pilot adjusting screw if over 450 mv Reading should be 500 50 mv for thermopile Reading should be between 25 and 35 mv for thermocouple Eliminate the draft Pressure at burner manifold should be 4 0 w c for natural gas and 10 0 w c for propane with all equipment on line in full operation If this cannot be maintained consult gas company PITCO Frialator Inc P O Box 501 Concord New Hampshire 03301 SECTION 2S TROUBLESHOOTING CHART Cont d TROUBLE POSSIBLE CAUSE REMEDY Pilot will light but Unitrol pilot gas valve will not hold open automatically Pilot flame lit but burners will not light Pilot flame and main burners cut off while cooking Fryer temperature recovery too slow Pilot flame is yellow Defective thermopile or thermocouple Defective thermopile or thermocouple Unitrol valve handle not turned to ON Float switch bulb off or stuck down Supply cord may not be plugged in or switch may not be turned on Defective probe Defective computer Defective Unitrol Hi Limit tripped Dirty burners
9. the limit control from the fryer Unpack the new limit control and carefully unroll the capillary tubing and straighten it out Install the new limit control by reversing the procedure BE CAREFUL NOT TO BEND KINK OR TWIST THE CAPILLARY TUBING SHARPLY THIS WILL DESTROY THE LIMIT CONTROL NORMAL FLOW A soft steady blue flame shouid enter the heat tube without touching the front outside rim ot the tube Figure 1 EXCESSIVE FLOW Flame seems to titt off face of burner 1 Adiust aw collar see figure 5 2 Check gas pressure see figure 5 tor location of gas pressure test plug ATMOSPHERIC BURNER hed MAIN BURNER ORIFICE AIR COLLAR BURNER FITTING GAS PRESSURE TEST PLUG Figure3 AIR COLLAR ADJUSTMENT Turn air collar and locknut i down as far as possible if flame N lifts otf the tace of the burner turn the air collar uo until the best is ootained Then tignten the locknut against the bottom of the air collar Figure 5 THERMOPILE PILOT BURNER INSUFFICIENT PILOT FLAME Remove pilot cap screw see fig ure 6 Using screwdnver with a 1 8 blade turn screw counter Clockwise to increase flame Adiust pilot flame to obtain the required millivoltage The reading should be between 300 to 500 mv INSUFFICIENT FLOW 1 Tubes baffles badly carnoned 2 Vent not property adiusteo 3 Blockage in neat tube or flue area Figure 2
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