Ejection head and ejection apparatus

An ejection apparatus comprising:

• an ejection head;
• a carriage configured to mount the ejection head thereon and reciprocate in a main scanning direction;
• and
• a conveyance roller provided below the carriage and configured to convey an ejection receiving medium in a sub scanning direction, wherein the ejection head includes
• an ejector module including an ejector driver element and an ejector heater capable of connecting with the ejector driver element,
• a circulator module arranged in a pair with the ejector module, and including a circulator driver element and a circulator heater capable of connecting with the circulator driver element,
• a group selection circuit configured to be capable of selecting at least one ejector group from among ejector groups into which a plurality of the ejector modules are divided by a predetermined number, and selecting at least one circulator group from among circulator groups into which a plurality of the circulator modules are divided by the predetermined number, and
• a control unit configured to determine whether or not to enable each of the selections by the group selection circuit based on an operation mode.