Vulcan-Hart SG4D service manual Flame Current Measurement, Blower Adjustment

Page 27

FLAME CURRENT MEASUREMENT

 

 

 

 

 

 

 

 

 

 

 

MICROAMP METER

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

S1

 

 

 

 

 

 

56

 

FENWAL

 

 

 

 

 

 

 

 

 

 

DUAL

LED

 

 

 

 

 

56

 

55

8

V2

CHANNEL

RED DIAGNOSTIC INDICATOR

52

 

 

345519-4

C-2

 

 

57

59

W

IGNITION

 

T

 

 

 

 

 

 

 

 

NC

 

 

 

 

U

424471-G1

 

 

 

 

 

S1

MODULE

 

LEFT

RIGHT

 

 

1

2

3

S1

S2

 

 

 

 

 

 

 

BURNER

BURNER

 

 

 

 

 

 

S2

 

 

 

 

 

 

 

 

 

 

SPARK

SPARK

 

 

 

2

 

 

 

 

 

 

OUT

OUT

48

 

 

 

 

 

 

 

 

 

 

 

S2

 

 

3

2

 

 

 

 

 

 

 

X

 

 

TH

 

 

 

 

 

D

 

 

 

 

1

 

 

 

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

V

6

57

 

 

L1

L2

 

 

 

 

 

5

 

 

 

48

 

 

 

 

 

 

 

 

 

 

 

 

 

W 120 VOLT UNITS PROVIDED

 

46

 

 

GND.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WITH 3 PRONG GROUNDED

 

 

WHITE

PLUG.

AB

GREEN

BLACK

 

AB

417856-1

CONNECT 200-240 VOLT

SUPPLY TO L1 & L2

1.Use a Microampere (µamp) meter to measure the flame current on both wires S1 & S2.

2.Connect a Microampere meter as shown above to S1 & S2, to read the actual flame current of each igniter.

3.The ignition system is 1 µamp sensitive.

4.You should be able to attain a reading of 4 µamps when connected as shown.

5.The meter is to be placed in series with the flame sense wires S1 & S2.

6.Connect at the board or the igniter end,

whichever is more convenient.

BLOWER ADJUSTMENT

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1.Remove the blower motor and mounting assembly as outlined under Blower and Motor in Removal and Replacement of Parts.

2.Loosen the motor mounting bolts.

3.Adjust the motor position until the blower is parallel to and 1/4" inch away from the motor mounting plate. Check to see if the blower is square to the motor mounting plate at the top, bottom, left and right of the blower.

A.If the blower is square, then tighten motor mounting bolts and proceed to step 4.

B.If the blower is not square, continue adjusting until proper spacing is achieved then tighten motor mounting bolts. If necessary, place shims between motor and frame.

PLACE SHIMS UNDER REAR OF

1/4 INCH AT

ALL PLACES

MOTOR TO WIDEN TOP SPACE.

 

 

 

TOP

 

FLAT

 

 

WASHER

 

 

MOTOR

BLOWER

 

FRAME

 

 

 

FLAT WASHER

 

PLACE SHIMS HERE

NUT/STAR

 

WHEN NEEDED.

WASHER

BOTTOM

PLACE SHIMS UNDER FRONT OF

 

MOTOR TO WIDEN BOTTOM SPACE.

 

 

MOTOR MOUNTING PLATE

 

 

 

PL-56058

4.Reverse the procedure to install. Use locktight on mounting nuts and bolts.

– 27 –

Image 27
Contents SG4 & SG6 Series Full Size GAS Convection Ovens VULCAN-HART Table of Contents Table of Contents General Component Location Removal and Replacement of PartsRight Side Panel Covers and PanelsTop Front Cover Bottom Front CoverSG4D/SG6D SG4C/SG6C Control Panel ComponentsComponent Panel Components SG4C/SG6C Temperature Probe Shown Temperature ProbeGAS Burners GAS Solenoid Valve GAS OrificeSpark Igniter and Flame Sense Ignition Control ModuleBlower and Motor Oven Doors and Bearings Roller Latch Assembly Independent Doors Door Catch Roller Assembly Independent DoorsDoor Window Door Switch Lamp Assembly High Limit ThermostatInterior Lights Cooling FAN Fan Installation TipsService Procedures and Adjustments Solid State Temperature Controller Test SG4D/SG6DTest Steps Calibration Steps Solid State Temperature Control Calibration SG4D/SG6DTemp F Ohms Temperature Probe Test SG4D/SG6DOperation Setup Mode Computer Controller SG4C/SG6CProbe Test Solid State Relay Test Computer Control Calibration SG4C/SG6CGAS Pressure Adjustment Verification of Spark AT Ignitor Door Switch AdjustmentFlame Current Measurement Blower AdjustmentDoor Strike Adjustment Independent Doors Door AdjustmentDoor Catch Roller Adjustment Component Description Electrical OperationPlug, Socket and Components SG4D/SG6D Front ViewControl Panel Component Panel Front ViewPlug, Socket and Components SG4C/SG6C SG4D/SG6D with Solid State Temperature Controller Sequence of OperationsCook Cycle Cool Down Cycle Solid State Temperature Controller Timer CycleNormal Cook Cycle SG4C/SG6C with Computer ControllerPage Roast and Hold Cycle Temperature and Time Cycle Normal CookingWiring Diagrams 426574 Rev. C Thermostat SchematicsGAS Convection Oven SG4 with Watlow 734 Control Symptoms Possible Causes TroubleshootingSymptoms Possible Causes Computer Control Models only Symptom Possible CausesError Codes Probable Cause Solution Problem