Burner Ignitor

Check the burner ignitor head for any obstructions,

 

 

also check for frayed or broken wire, any type of

 

 

damage to spark gap (.100 in. 2.5 mm) If there is

 

 

visible damage, replace ignitor assembly.

Pilot flame but no main

Spark Ignitor (Flame Sensor)

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

flame

 

NOTE: The Honeywell Ignition Control uses the

 

 

spark ignitor as the flame sensor. If spark

 

 

continues, check for proper ground connections at

 

 

Ignition Control. Check pilot orifice for any partial

 

 

blockage. If the above checks OK, replace ignition

 

 

control. If spark stops when pilot is lit, check for 24

 

 

VAC across M.V. - M.V/ P.V. terminals, if voltage is

 

 

not present, replace ignition control. If voltage is

 

 

present at terminals M.V. - M.V./P.V., the indicator

 

 

light on the control panel should be on, verify that

 

 

the main valve has opened, connect manometer to

 

 

manifold gas pressure tap (located on the back

 

 

side of the gas valve). If no gas is present, replace

 

 

gas valve.

Red Indicator Light is

Temperature Control Valve

Check for gas supply at temperaturecontrol. Check

on, but no main

(Robert Shaw)

for temperature control set above 300°F.

flame(For ovens with

Main Orifice

Check for blockage of main orifice. If there is no

mechanical

 

blockage to the main orifice, replace the

thermostat)

 

temperature control.

(For ovens with

Temperature Control

Check for 120 VAC across L1 and L2on

Electronic

Potentiometer

temperature control board. Potentiometer (1000

Temperature Control)

 

ohm,1 turn) WITH POWER OFF: check ohms

 

 

across red and black leads, the ohm reading

 

 

should be 0 to1000 ohms as the dial is turned.

 

 

From green to red, the reading should be 1000

 

 

ohms steady throughout the full turn of the dial.

NOTE: Ovens S/N Q18037 and above, the potentiometer is internal to temperature control. Proceed to next

component.

 

 

 

Thermocouple Probe

Remove thermocouple leads from the temperature

 

 

control board, and measure the millivolt output of

 

 

these leads. Refer to chart on page 59 in the

 

 

adjustment section for proper readings.

 

Temperature Control

Turn temperature control dial to full "on" position.

 

 

Measure for 120 VAC across terminals "N.O." and

 

 

"L2", if voltage is not present; replace control.

 

Solenoid Valve

If voltage is present at terminals "N.O." and "L2",

 

 

check for voltage at solenoid valve. If voltage is

 

 

present, listen for valve to open and close. Also,

 

 

check for opens and shorts in coil. If solenoid valve

 

 

is defective, replace

Intermittent Heating

 

Both the main fan motor and burner blower motor

 

 

are equipped with thermo-protection and will cease

 

 

to operate when not cooled properly. This can

 

 

cause the units to cycle on and off intermittently.

 

 

Also, most of the problems listed under "oven will

 

 

not heat" can cause intermittent failures.

For continuing intermittent problems, a series of test lights may be made and installed in

the ovens. The lights will allow the customer to advise the service technician a trouble code when the oven fails.

The lights should be connected in the following manner:

 

Light#l attached in 120VAC line after Air Pressure Switch.

 

Light#2 attached after 120VAC contacts of Burner Motor Relay (or, refer to Bulletin #028

 

for Relay Removal).

 

Light#3 in 24VAC Burner Transformer Secondary.

 

Impinger I -–1000 Series Service Manual - International

29

Page 29
Image 29
Lincoln Series 1200, Series 1000 service manual FlameFor ovens with, Mechanical, Thermostat, Electronic, Temperature Control

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.