PUB 95106 Excellent tech info that applies to all gas ranges including the theory of operation for gas spark ignition stove top burners (starting on page 13). Models covered include: CPS Convection Plus – single oven, convection  127 – Single oven 27 inch  227 – Double 27 inch, top only convection CPD Double convection ovens PCS/D MCS/D ECS/D DMO Microwave Oven ECPS Epicure Series, single oven, convection  127 – Single oven 27 inch  227 – Double 27 inch, top on