Electronic Modulation Gas-Fired Temperature 14 & 44
Controls/ Direct Fired Applications Models
DEsCrIPtIon Selectra®
systems from Maxitrol maintain precise, stable
gas-fired temperatures. Selectra’s unique electronic Modulator or Modulator-Regulator valves control gas flow with instantaneous response and continual adjustment. They are the superior alternative to mod motors and butterfly valves.
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SPACE HEATING APPLICATIONS Series 44
Selectra®
Series 44 systems are designed primarily for space heating, as components of direct fired equipment.
A wall mounted Selectrastat senses space temperature and has an integral selector with either a 55º to 90º F or 40º to 80º F range. A discharge air temperature sensor (and mixing tube) is a means of limiting the minimum and maximum discharge air temperature.
Amplifiers are available with low-fire start duration feature.
MR212 Option:
Instead of a Selectrastat, a separate remote temperature sensor and selector can be substituted.
Series 14 MAKE UP AIR APPLICATIONS
Selectra®
Series 14 systems are designed primarily for make-up air heating, as components of direct fired equipment.A discharge air temperature sensor is mounted within a mixing tube housing.
Amplifiers are available with low-fire start duration, and integral or remote temperature selection.
M411/M511 Options:
• A room override thermostat provides space temperature control by raising the discharge air temperature to a preselected point - when used in conjunction with the remote temperature selector.
• An inlet air sensor (and mixing tube) provides inverse change in discharge air for each degree change in inlet air - when installed in a convenient duct location upstream of the burner.
M611
• A dual temperature selector replaces TD114 to provide dual control for door heaters, or other applications such as paint spray booths.