Pilot flame but no main

Flame Sensor

(There should be a visible pilot flame at this time.)

 

flame

 

To check for proper flame sensor operation,

 

 

 

connect a digital multimeter (capable of measuring

 

 

 

D. C. microamperes) in series between the flame

 

 

 

sensor wire (normally connected to terminal #4)

 

 

 

and terminal #4. NOTE: This is a current

 

 

 

measurement and the meter must be connected in

 

 

 

series. This procedure is for checking the pilot

 

 

 

flame only. Remove main valve wire (Red) from

 

 

 

terminal #3 on ignition control. With a visible pilot

 

 

 

flame, the current readings should be as follows:

 

 

 

Johnson G-65 control, 0.2 micro amp. D.C.

 

 

 

minimum/Johnson G-60 control, 0.7 micro amp.

 

 

 

D.C. minimum. If these values are not achieved,

 

 

 

replace flame sensor. Also check for any type of

 

 

 

damage to flame sensor wire and connections.

 

 

Ignition Control and Valve

If there is a pilot flame, and there is sufficient micro

 

 

Assembly

amp. current at terminal #4, check for 24 VAC

 

 

 

that the main valve (internal to valve assembly) has

 

 

 

opened. Connect a manometer to the manifold gas

 

 

 

pressure tap located on the back side of the ignition

 

 

 

control and valve assembly. If no gas is present,

 

 

 

replace ignition control and valve assembly.

 

For ovens with

Centrifugal Switch of Burner

Check for 24 VAC output from secondary of

 

Honeywell ignition

Blower Motor

transformer. If voltage is present, check for 24 VAC

 

control

 

at terminals marked "24V" and "24V gnd" on

 

 

 

Ignition Control. If the Burner Blower Motor is

 

 

 

running and there is no voltage at terminals 24V

 

 

 

and 24V gnd on the ignition control, replace the

 

 

 

Burner Blower Motor.

 

 

NOTE:

These Ignition Controls have a 30 second pre-

 

 

 

purge(Delay) and a 15 second lock-out time – The

 

 

 

Ignition Control will try for ignition for 15 seconds

 

 

 

and then shut-off. To Re-try for ignition, turn off

 

 

 

burner switch, wait 30 seconds and re-try ignition.

 

 

Ignition Control

Check for 24 VAC supply to ignition control at

 

 

 

terminals "24V" and "24V gnd". If voltage is

 

 

 

present, check for 24V at terminal "P.V. (Pilot

 

 

 

Valve) and "gnd". If voltage is not present, replace

 

 

 

Ignition Control. If the pilot valve is energized,

 

 

 

check to see that the high voltage ignitor circuit is

 

 

 

also energized. To check, disconnect the ignitor

 

 

 

lead from the ignition control. Place the terminal of

 

 

 

ignitor lead approximately 1/8" from terminal post

 

 

 

on Ignition Control. Spark should jump the 1/8"

 

 

 

gap. If no spark is present, replace ignition control.

 

No Pilot

 

If the ignition control is supplied with 24 VAC and

 

 

 

the pilot valve (in gas valve) and ignitor circuits are

 

 

 

energized, visually check for pilot flame. This may

 

 

 

be done by opening the small inspection door on

 

 

 

the end of the burner, or by opening the main oven

 

 

 

door and looking under the lower finger housing in

 

 

 

the right side of the oven.

 

 

Pilot Shut-off Valve

If no pilot flame is visible, check to see that the pilot

 

 

 

shut-off valve is open (shut-off valve is located

 

 

 

between gas valve and burner).

 

 

Pilot Tube

Check for gas pressure at pilot tube. Disconnect

 

 

 

pilot tube at burner and connect manometer to pilot

 

 

 

tube. If no gas pressure is present, check for

 

 

 

blockage in pilot tube or pilot shut-off valve.

 

 

Pilot Orifice

If there is gas pressure at the pilot tube, check the

 

 

 

pilot orifice for obstructions. Replace as needed.

 

28

 

Impinger I -–1000 Series Service Manual - International

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Image 28
Lincoln Series 1000, Series 1200 service manual Control
Page 27 Page 29

Series 1000, Series 1200 specifications

The Lincoln Series 1200 and Series 1000 are two distinguished models in the range of Lincoln Electric welding machines, epitomizing quality, versatility, and advanced technology for both industrial and residential welding applications.

The Lincoln Series 1200 is renowned for its robust build and high-performance capabilities. One of its main features is the ability to perform both MIG (Metal Inert Gas) and stick welding processes, making it a versatile option for various welding requirements. It incorporates an intuitive control panel that allows for easy settings adjustments, ensuring operators can swiftly adapt to different materials and thicknesses. The Series 1200 is equipped with a powerful drive system to provide smooth wire feeding, minimizing downtime due to jams or misfeeds. Additionally, its high-duty cycle support allows continuous operation, making it an ideal choice for professional welders and fabrication shops.

In terms of technology, the Series 1200 employs advanced inverter technology that enhances energy efficiency while reducing the machine’s overall weight. This results in portability without compromising power, making it a practical choice for on-site tasks. Moreover, the machine features an automatic voltage adjustment that optimizes performance based on the input voltage, ensuring reliable operation even under fluctuating power conditions.

On the other hand, the Lincoln Series 1000 is specifically designed for entry-level users and small projects. It shines with its user-friendly interface, which simplifies the welding process for beginners. This model typically includes pre-set parameters and an easy-to-read display, enabling novice operators to achieve excellent welds with minimal experience. Despite its entry-level focus, the Series 1000 does not skimp on performance, offering dependable results across various materials.

Both the Series 1200 and Series 1000 incorporate safety features, including thermal overload protection, ensuring that users can operate the machines with peace of mind. Their durable construction allows for prolonged use in tough work environments without sacrificing reliability.

In conclusion, the Lincoln Series 1200 and Series 1000 cater to a wide range of welding needs, from professional applications to home projects. Their respective features and technologies present options that can fit various skill levels while delivering exceptional welding performance and longevity. Whether you are a seasoned professional or a hobbyist, Lincoln Electric provides reliable solutions to meet your welding requirements.
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