Pitco MGII Service Manual
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Pitco MGII Service Manual

Mcdonald's full and split gas fryers with and without filter
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IMPORTANT FOR FUTURE REFERENCE
Please complete this information and retain this manual
for the life of the equipment:
Model #: ___________________________
Serial #: ___________________________
Date Purchased: ____________________
Service Manual
MGII: McDonald's Full and Split Gas Fryers
with and without Filter
C
E
R
T
I
F
I
E D
I
L22-236 Rev. 2 (06/11)

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  • Page 1 Please complete this information and retain this manual for the life of the equipment: Model #: ___________________________ Serial #: ___________________________ Date Purchased: ____________________ Service Manual MGII: McDonald’s Full and Split Gas Fryers with and without Filter L22-236 Rev. 2 (06/11)
  • Page 2 Pitco and/or its Authorized Service and Parts (ASAP) WARNING companies, this warranty will be void. In addition, Pitco and its affiliates will not be liable for any claims, damages or Completely shut the appliance down when oil/shortening is expenses incurred by the customer which arises directly or being drained from the appliance.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS MGII Full and Split Tank Gas Fryer 1. THEORY OF OPERATION..............5 1.1............................5 EATING YSTEM 1.2. : ..........................5 IMIT YSTEM 1.3. - U.S./C ..................5 ELAY YSTEM ANADA UNITS ONLY 1.4..........................5 EMPERATURE ROBE 1.5............................6 ILTER YSTEM 2.
  • Page 4 https://appliancetechmanuals.com TABLE OF CONTENTS 5.3.1. Manual Gas Shutoff......................21 5.3.2. Gas Valve Removal ......................21 5.3.3. Pilot Removal........................23 5.3.4. Burner Removal........................23 5.3.5. Gas Conversion ........................24 5.4..............................25 5.4.1. Probe Replacement......................25 5.4.2. High Limit Replacement ..................... 26 5.4.3.

  • Page 5: Theory Of Operation

    MGII and MG2T GAS FRYER 1. Theory of Operation Knowing and understanding the MGII sequence of fryer and component operation will enable you to diagnose equipment failure more easily and accurately. (Note: The schematic references used are derived from the schematic on pages _ - _ of this manual.)

  • Page 6: Filter System

    https://appliancetechmanuals.com SERVICE 1.5. Filter System  Opening the RED filter return valve handle closes the magnetically actuated Proximity Switch, LS4, causing the “Pump Run” Relay, K5, to be energized. This allows line voltage to flow to the Filter Pump Motor, M1. The Pump Motor begins to run. Closing the filter return valve handle will de-energize the relay and the Pump Motor will stop running.

  • Page 7: Troubleshooting

    SERVICE MGII and MG2T GAS FRYER 2. Troubleshooting 2.1. Fryer Troubleshooting Problem Probable Causes Corrective Actions No power to appliance. Check main building power supply. Circuit Breaker tripped. Reset circuit breaker. Connect power cord. Check power cord where it enters the rear of the Power Cord loose or not connected.
  • Page 8 https://appliancetechmanuals.com SERVICE Problem Probable Causes Corrective Actions Allow appliance to cool and reset High temperature limit has tripped. high temperature limit. Check and replace if defective Turn fryer off and back on again to reset ignition module. If lockout Ignition Module has locked out. Computer Controller recurs, check for proper pilot flame shows “IGNITION...

  • Page 9: Filter Troubleshooting

    SERVICE MGII and MG2T GAS FRYER 2.2. Filter Troubleshooting Drain valve is not fully open Press down on the drain valve handle and verify that it is fully open Drain is plugged with debris. Use the clean out rod to clear Drain Valve is open;...

  • Page 10: Component Troubleshooting

    https://appliancetechmanuals.com SERVICE 3. Component Troubleshooting 3.1. Temperature Probe: TEMP RESISTANCE TEMP RESISTANCE OHM  OHM  °F/°C °F/°C Electrical resistance of the Temperature Probe, RT1, changes as the 60/16 139,055 330/166 1,192 temperature changes. As temperature rises, the probe’s resistance 80/27 84,644 335/168...

  • Page 11: High Limits

    SERVICE MGII and MG2T GAS FRYER pressure is reached. Turning the screw clockwise will increase the burner pressure. Turning the screw counterclockwise will decrease the burner pressure. When the pressure is correct, replace the regulator adjustment screw cap. NOTE: A properly sized and installed gas line will deliver a minimum supply pressure of 7.0”...

  • Page 12: Relay Board

    https://appliancetechmanuals.com SERVICE Note: When the Computer Controller is on, the pilot should always remain lit. If the pilot is not lit, either the high limit is open, or the ignition module has locked out. Ignition module lockout can be reset by turning the fryer off and back on again.

  • Page 13: Computer Controller

    Note: When replacing a controller, it must be set up for the appliance type, (GAS, GAS2 or ELECTRIC) on which it is installed. The MGII fryer uses the GAS2 temperature algorithm. Failure to set the control up for the correct appliance type may result in poor appliance operation.

  • Page 14: Flue Baffle

    3.9. Flue Baffle The McDonald’s MGII Gas Fryers are typically installed in a direct-coupled ventilation hood. They are shipped from the factory with adjustable baffles installed in the flue of each fryer. Upon installation, these baffles must be adjusted to provide proper operation within the ventilation hood.

  • Page 15: Ce Gas Table

    SERVICE MGII and MG2T GAS FRYER 4. CE GAS TABLE Refer to the following table for gas specifications for the country of use. If the country of use is NOT listed, refer to the information stamped on the data plate.
  • Page 16 SERVICE 23.4 21.1 MGII APPROVED WITH THIS COUNTRY 23.4 21.1 MGIIT APPROVED WITH THIS COUNTRY 21.1 MGII 23.4 21.5 50/37 25.4 LP16 21.1 MGIIT 23.4 21.5 50/37 25.4 LP16 23.4 21.1 MGII APPROVED WITH THIS COUNTRY 23.4 21.1 MGIIT...

  • Page 17: Component Replacement Fryer

    SERVICE MGII and MG2T GAS FRYER 5. Component Replacement Fryer 5.1. Front Panel WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 5.1.1. Front Panel Bezel 5.1.2. Computer Removal 1. Remove Bezel Screws with Phillips Screwdriver.

  • Page 18: Front Panel And Top Deck

    https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 5.1.4. Front Panel and Top Deck 1. Remove front panel bezel. 5. Remove front panel heat shield from cabinet, 2. Disconnect electrical harness from wire reduction lower end first, sliding harness strain relief out of board.

  • Page 19: Control Components

    SERVICE MGII and MG2T GAS FRYER 5.2. Control Components WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 5.2.1. Ignition Module 6. Remove screws securing module to bracket. 1. Using a 5/16” hex bit, remove screw securing 7.

  • Page 20: Transformer

    https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 2. Unplug cords from side of Cord Entrance Box 3. Using a 5/16” hex bit, remove the screws from the top and bottom of the transformer Box. 4.

  • Page 21: Gas Train

    SERVICE MGII and MG2T GAS FRYER 5.3. Gas Train WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK WARNING! DISCONNECT APPLIANCE FROM GAS SUPPLY OR SHUT MANUAL GAS VALVE PRIOR TO SERVICING GAS TRAIN 5.3.1.
  • Page 22 https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK WARNING! DISCONNECT APPLIANCE FROM GAS SUPPLY OR SHUT MANUAL GAS VALVE PRIOR TO SERVICING GAS TRAIN 4. For Split Tank Gas Valves: 5. Remove brass quick disconnect fittings from Gas Valve using 15/16”...

  • Page 23: Pilot Removal

    SERVICE MGII and MG2T GAS FRYER WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK WARNING! DISCONNECT APPLIANCE FROM GAS SUPPLY OR SHUT MANUAL GAS VALVE PRIOR TO SERVICING GAS TRAIN 5.3.4. Burner Removal 5.3.3.

  • Page 24: Gas Conversion

    https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK WARNING! DISCONNECT APPLIANCE FROM GAS SUPPLY OR SHUT MANUAL GAS VALVE PRIOR TO SERVICING GAS TRAIN 5.3.5. Gas Conversion 1. Note: On some fryers, burner replacement is required when performing gas conversion.

  • Page 25: Tank

    SERVICE MGII and MG2T GAS FRYER 5.4. Tank WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 5.4.1. Probe Replacement 1. Completely drain fry tank into a suitable container. 5. Loosen Ferrule Nut on probe fitting underneath tank, using 7/16”...

  • Page 26: High Limit Replacement

    https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 5.4.2. High Limit Replacement 1. Completely drain fry tank into a suitable container. 6. Unscrew high limit fitting from tank bottom using 9/16” open-end wrench. 7.

  • Page 27: Tank Removal

    SERVICE MGII and MG2T GAS FRYER WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK WARNING! DISCONNECT APPLIANCE FROM GAS SUPPLY OR SHUT MANUAL GAS VALVE PRIOR TO SERVICING GAS TRAIN 5.4.4. Tank Removal 6.
  • Page 28 https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 10. Remove cabinet bottom rear cover. 14. Remove screws securing splashback to rear of tank using flat bladed screwdriver, and remove splashback. 15. Remove front panel bezel, bottom rail, heat shield, and top deck.

  • Page 29: Tank Disassembly

    SERVICE MGII and MG2T GAS FRYER WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 4. Remove 6 burner rack mounting screws from tank, using 5/16” hex bit. Remove burner rack from tank(s).

  • Page 30: Tank Assembly

    https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 5.4.6. Tank Assembly 1. For filter-equipped fryers apply pipe thread c. Tighten the return valves using 1 1/8” compound or Teflon tape to return valve wrench on return valve and 1”...
  • Page 31 SERVICE MGII and MG2T GAS FRYER WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 6. Attach flue to flue brackets using 5/16” hex bit 9. Apply pipe thread compound or Teflon tape and 3/8”...
  • Page 32 https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 17. Straighten high limit capillary. Leave a slight 13. Apply pipe thread compound or Teflon tape to bend in capillary just below bulb. pipe threads of fitting.

  • Page 33: Tank Installation

    SERVICE MGII and MG2T GAS FRYER WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 5.4.7. Tank Installation 21. On full tanks, the slide the probe through the ears of the bulb clamp, and then tighten clamp 1.
  • Page 34 https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 5. Install channel strip(s) between adjacent fry 9. For filter equipped fryers, install return valve tanks. handle through hole in valve link. Install flat and spring washer, and hold in place with pliers.
  • Page 35 SERVICE MGII and MG2T GAS FRYER WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 13. For filter equipped fryers, place return valve 17. Reinstall drain valve handle using 11/16” handle rod in slot in bracket, and install socket.

  • Page 36: Component Replacement - Filter

    https://appliancetechmanuals.com SERVICE 6. Component Replacement – Filter 6.1. Pump and Pump Box WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 6.1.1. Pump Removal 1. Remove Filter Pan and Cover 2. Disconnect pump power cable from rear of pump box.

  • Page 37: Pump Box

    SERVICE MGII and MG2T GAS FRYER WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 6.1.2. Pump Box 6.1.4. Pump Relay Note: On split tank fryers, it may be necessary to 1. Remove Pump Box. See Section 6.1.2.

  • Page 38: Drain Line

    https://appliancetechmanuals.com SERVICE WARNING! SHUT OFF APPLIANCE AND DISCONNECT ALL POWER CONNECTIONS PRIOR TO STARTING ANY SERVICE WORK 6.2. Drain Line 6.2.1. Drain Line Removal 1. Loosen band clamp(s) using 7/16” hex bit. Slide band gasket and clamp to separate joint. 2.

  • Page 39: Schematics

    SERVICE MGII and MG2T GAS FRYER 7. Schematics 7.1. Control Schematic L22-236 Rev. 2 (06/11)

  • Page 40: Filter System 115V

    https://appliancetechmanuals.com SERVICE 7.2. Filter System 115V L22-236 Rev. 2 (06/11)

  • Page 41: Filter System 208, 220 - 240 V

    SERVICE MGII and MG2T GAS FRYER 7.3. Filter System 208, 220 – 240 V L22-236 Rev. 2 (06/11)

  • Page 42: Cord Box & Hood Control (Us & Canada)

    https://appliancetechmanuals.com SERVICE 7.4. Cord Box & Hood Control (US & Canada) 7.5. Cord Box w/o Hood Control (US & Canada) L22-236 Rev. 2 (06/11)

  • Page 43: Cord Box (Export & Ce)

    SERVICE MGII and MG2T GAS FRYER 7.6. Cord Box (Export & CE) L22-236 Rev. 2 (06/11)
  • Page 44 (603) 225-6684 World Wide representative (ASAP) covering your area, or Website Address: www.pitco.com contact Pitco at the numbers listed to the left. MAILING ADDRESS – P.O. BOX 501, CONCORD, NH 03302-0501 SHIPPING ADDRESS – 10 FERRY ST., CONCORD, NH 03301...

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