ALKAR Gas Heated Control Systems with Fireye Combustion Safeguard

If food processing oven is heated with gas, ALKAR recommends that after the processing oven has been loaded with product and prior to start-up, that all oven doors remain open before, during and for a minimum of three (3) or four (4) minutes after main recirculating air fan has been started. This wise precaution allows adequate venting of processing oven, dissipating any gases that may have accumulated. This venting is in addition to the automatic pre-purge cycle venting that occurs after all combustion safeguard check OK, in the electronic circuit and prior to being able to ignite low fire start of main burner.

Start Up Sequence Gas Burners

• Open air valves to control panels.
• Energize all applicable disconnect switches.
• Set temperature and timer controls, smoke damper and fresh air damper switches (if applicable).
• Turn instrument switch to ON position to make temperature recorder work. Oven light may be turned ON also.
• Open the oven door with the microswitch over it.
• Turn safety control switch to ON, alarm horn will sound off.
• Shut off horn by depressing alarm silence button.
• Start main fan blower. Two (2) lights will come on. One for main fan and one for purge cycle will come on.
• Upon completion of purge cycle the combustion safeguard will automatically start burner.
• The third light, safety valve opens, will come on.
• If burner fails to light after two attempts the combustion safeguard will lock out, lighting combustion safeguard lockout light.
• Start timers, if applicable, by depressing the timer start button.