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Pitco MGII, Руководство по обслуживанию

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SERVICE

12

L22-236 Rev. 2 (06/11)

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.

3.7. Relay 

Board:

 

The relays on the relay board have 24VDC coils. They are soldered to the board and are non-repairable.
In the event of a relay failure, replace the relay board

 

When installed, the relay board must have fish paper installed between it and the heat shield to which it is
mounted. This prevents the leads on the board from shorting against the metal heat shield.

Relay Board Component Explanation:

Fuse:

F1 – If fuse is blown, AC will not be lit.

Trouble Shooting Lights:

A.C. – When lit, F1 Fuse and T1 Transformer are good.
S.O. – When lit, A1 Computer is on and K3 Side On Relay should be energized.
H.D. – When lit, A1 Computer is on and calling for heat, K1 Heat Demand Relay should be energized.

Relays:

K1 – Heat Demand Relay, will be energized when A1 Computer calls for heat and when H.D. is lit.
K3 – Side On Relay, will be energized when A1 Computer is on and A.C. is lit.

Connectors:

J31 – Connects to A1 Computer.
J32 – To Side On and Heat Demand Contactors and Heat Feed Back.
J33 – To 24 VAC jumper harness.
J34 – To Drain Switch.
J35 – Input voltage from transformer.

Relay Board:

Note:

 J connectors are marked on the relay board.

 

With 24 VAC supplied to pin #2 at connector J35 and a good
F1 fuse, the relay board will have a 24 VAC output at pin #2 on
connectors J33 and J34 and the A.C. indicator will be
illuminated.

Note: Since the fryer is equipped with a computer, at
connection J33 there will be a jumper from pin #2 to pin
#10 to supply 24 VAC to pin #2 at connection 

J

31 to supply

the controller with 24 VAC.

 

When the board receives a 24 VDC side on input at pin #7 on
connectors J31 and J33, the S.O. indicator will illuminate, the
side on relay (S.O.) will energize and there will be a 24 VAC
output at pin #4 on connector J32.

 

When the board receives a 24 VDC heat demand input at pin
#6 on connectors J31 or J33, the H.D. indicator will illuminate,
the heat demand relay (H.D.) will energized and there should
be continuity between pin #1 and pin #2 at connector J32.

https://appliancetechmanuals.com

Содержание MGII

Страница 1: ...tain this manual for the life of the equipment Model ___________________________ Serial ___________________________ Date Purchased ____________________ ENGLISH MGII McDonald s Full and Split Gas Fryer...

Страница 2: ...tco Authorized Service and Parts ASAP company technician or a similarly qualified person in order to avoid a hazard WARNING The power supply must be disconnected before servicing maintaining or cleani...

Страница 3: ...VALVE 10 3 3 HIGH LIMITS 11 3 4 DRAIN VALVE RETURN VALVE SWITCHES 11 3 5 TRANSFORMER 11 3 6 IGNITION MODULE 11 3 7 RELAY BOARD 12 3 8 COMPUTER CONTROLLER 13 3 9 FLUE BAFFLE 14 4 CE GAS TABLE 15 5 COM...

Страница 4: ...9 5 4 6 Tank Assembly 30 5 4 7 Tank Installation 33 6 COMPONENT REPLACEMENT FILTER 36 6 1 PUMP AND PUMP BOX 36 6 1 1 Pump Removal 36 6 1 2 Pump Box 37 6 1 3 Pump Transformer 37 6 1 4 Pump Relay 37 6 1...

Страница 5: ...roller calls for heat The Heat Demand Relay is energized supplying the Gas Valve with 24VAC and the HD LED on the Relay Board illuminates This also supplies the Computer Controller with a heat feedbac...

Страница 6: ...stem and the heat tape if so equipped in the event of over current The Circuit Breaker switch must be in the ON position for the pump and heat tape to operate The return piping system may be provided...

Страница 7: ...ply is off Verify main gas supply is turned on Gas shut off valve yellow handle is closed Verify gas shut off valve is open yellow handle is in line with the gas line Gas valve is not turned on Turn m...

Страница 8: ...adding oil during test and compare results Quick disconnect not properly connected Verify quick disconnect is properly seated Low gas pressure Check regulated gas pressure at burner manifold Verify pr...

Страница 9: ...Pump return handle is pulled out but no pumping sound can be heard Loose or defective sensor switch Check that the switch is tight and has the correct gap Replace if defective Dirty filter media Chang...

Страница 10: ...24VAC is applied to the MV connection the main valve opens allowing gas to flow to the main burners Pilot flame is adjustable using the pilot adjustment screw It should be adjusted at installation to...

Страница 11: ...ing the return valve handle will open the proximity switch causing the relay to de energize and the pump will stop pumping These switches can be checked with an Ohmmeter When the switch is closed you...

Страница 12: ...A1 Computer calls for heat and when H D is lit K3 Side On Relay will be energized when A1 Computer is on and A C is lit Connectors J31 Connects to A1 Computer J32 To Side On and Heat Demand Contactors...

Страница 13: ...splay should read OFF With the controller turned on there will be a 24 VDC output at pin 9 side on When the controller calls for heat there will be a 24 VDC output at pin 8 heat demand and a 24 VAC in...

Страница 14: ...sition and retighten the screws 3 Reinstall fryer under ventilation hood 4 Recheck burner operation 5 Repeat as necessary The burners should be rechecked after baffle adjustment If there is pulsing or...

Страница 15: ...50 37 25 4 55 LP16 Ja 0 88 Nat G20 I2H 21 1 20 10 46 N22 Ja 2 2 LP G31 I3P 21 5 50 37 25 4 55 LP16 Ja 0 9 Nat G20 I2H 21 1 20 10 46 N22 Ja 2 2 LP G31 I3P 21 5 50 37 25 4 55 LP16 Ja 0 9 Nat G20 I2H 21...

Страница 16: ...at G20 I2H 21 1 20 10 46 N22 Ja 2 2 LP G31 I3P 21 5 50 37 25 4 55 LP16 Ja 0 9 Nat G20 I2H 21 1 20 10 46 N22 Ja 2 2 LP G31 I3P 21 5 50 37 25 4 55 LP16 Ja 0 9 Nat G20 I2H 23 4 21 1 20 10 46 N22 Ja 2 2 L...

Страница 17: ...bezel studs 2 Loosen two 10 24 nuts securing bottom of computer to bezel studs 3 Remove computer from bezel 5 1 3 Wire Reduction Board 1 Fuse F1 is located on Wire Reduction Board Replace with 2 5 A...

Страница 18: ...retention clip to cabinet using 5 16 hex bit 5 Remove front panel heat shield from cabinet lower end first sliding harness strain relief out of notch in shield Remove inner burner heat shields 6 Repe...

Страница 19: ...at the rear of the bracket allowing removal of the module and bracket 4 Disconnect the 6 position electrical connector 5 Remove the module and bracket from the fryer 6 Remove screws securing module to...

Страница 20: ...tallation 5 2 4 Cord Entrance Box 1 Remove plug guard from cord box using a 5 16 Hex socket 2 Unplug cords from side of Cord Entrance Box 3 Remove nuts securing box to caster bolts using a 7 16 hex so...

Страница 21: ...1 16 open end wrench on supply tubing end connector and 15 16 open end wrench on brass male flare fitting at base of valve b Loosen top valve flare fitting from burner manifold using 1 1 16 open end...

Страница 22: ...quick disconnect fittings from Gas Valve using 15 16 open end wrench on male flare fitting at bottom of valve and 7 8 thin open end wrench on male end of female fitting at top of valve 6 For Full Tank...

Страница 23: ...oosen and disconnect top valve flare fitting from burner manifold using 1 1 16 open end wrench on female brass flare fitting at top of valve and 15 16 open end wrench on male brass flare fitting attac...

Страница 24: ...ottom rail and heat shield to gain access to burner orifices See Section 5 1 4 5 Remove burner orifice tips using 7 16 wrench Install new burner orifices 6 Reinstall pilot assembly 7 If removed reinst...

Страница 25: ...and probe through probe fitting Adjust probe height so that it rests on tank tapping pad 9 Apply pipe thread compound or Teflon tape to pipe threads of new fitting Slide wires through new fitting one...

Страница 26: ...ng in tank bottom 8 Installation is reverse of removal Note the following Apply pipe thread compound or Teflon tape to pipe threads of high limit fitting prior to installing in tank coupling Leave fer...

Страница 27: ...nition module 6 Remove pilot assembly s See Section 5 3 3 7 Loosen and disconnect gas valve s top flare fitting from burner manifold using 1 1 16 open end wrench on female brass flare fitting at top o...

Страница 28: ...t of cabinet 13 Remove screws securing splashback to cabinet rear using 5 16 hex bit 14 Remove screws securing splashback to rear of tank using flat bladed screwdriver and remove splashback 15 Remove...

Страница 29: ...s from tank using 5 16 hex bit Remove burner rack from tank s 5 Remove 4 screws and nuts securing flue to tank using 5 16 hex bit and 3 8 socket or box wrench Remove flue from tank 6 For filter equipp...

Страница 30: ...both valves b Rotate valves into position using a large Phillips screwdriver inserted into the open port on the return valves c Tighten the return valves using 1 1 8 wrench on return valve and 1 wrenc...

Страница 31: ...nt of rack On split tanks leave out 2 screws in lower center of rack These screws will be installed when the high limit bracket is installed 9 Apply pipe thread compound or Teflon tape onto tank drain...

Страница 32: ...ted on the lower right two mounting holes 17 Straighten high limit capillary Leave a slight bend in capillary just below bulb 18 Insert high limit bulb and capillary through fitting in tank bottom On...

Страница 33: ...ll shear capillary tubing turn beyond hand tight should provide sufficient sealing 24 For split tanks repeat steps 17 20 and 23 for the other tank half 5 4 7 Tank Installation 1 Install tank assembly...

Страница 34: ...wrench 9 For filter equipped fryers install return valve handle through hole in valve link Install flat and spring washer and hold in place with pliers Install cotter pin through hole in link to secu...

Страница 35: ...assembly See Section 5 3 3 16 Reconnect electrical plugs for high limit P5 probe P7 and drain switch P8 17 Reinstall drain valve handle using 11 16 socket 18 Reinstall filter drain line if so equippe...

Страница 36: ...ench 5 Unscrew filter pickup receptacle and pipe nipple from pipe coupling using arc joint pliers 6 Remove pump rod bracket using 5 16 hex bit 7 While supporting pump remove pump support rods 8 Lower...

Страница 37: ...s screwdriver and needle nose pliers 3 Disconnect wires to pump transformer noting location for reassembly 6 1 4 Pump Relay 1 Remove Pump Box See Section 6 1 2 2 Remove relay from pump box using Phill...

Страница 38: ...clamp s using 7 16 hex bit Slide band gasket and clamp to separate joint 2 Remove screws securing Drain T s and Elbows to drain valve s using 9 16 socket WARNING SHUT OFF APPLIANCE AND DISCONNECT ALL...

Страница 39: ...MGII and MG2T GAS FRYER SERVICE L22 236 Rev 2 06 11 39 7 Schematics 7 1 Control Schematic https appliancetechmanuals com...

Страница 40: ...SERVICE 40 L22 236 Rev 2 06 11 7 2 Filter System 115V https appliancetechmanuals com...

Страница 41: ...MGII and MG2T GAS FRYER SERVICE L22 236 Rev 2 06 11 41 7 3 Filter System 208 220 240 V https appliancetechmanuals com...

Страница 42: ...SERVICE 42 L22 236 Rev 2 06 11 7 4 Cord Box Hood Control US Canada 7 5 Cord Box w o Hood Control US Canada https appliancetechmanuals com...

Страница 43: ...MGII and MG2T GAS FRYER SERVICE L22 236 Rev 2 06 11 43 7 6 Cord Box Export CE https appliancetechmanuals com...

Страница 44: ...ess www pitco com In the event of problems with or questions about your equipment please contact the Pitco Frialator Authorized Service and Parts representative ASAP covering your area or contact Pitc...

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