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The Markel 5100 Series Horizontal or Vertical Mounted Electric Fan Forced Unit Heater is a commercial and Industrial grade unit heater.
CONSTRUCTION: Heavy 18 Gauge welded steel cabinet with powder coated finish and control compartment housing a master terminal board with a hinged and latched access door, simplifying wiring, installation and maintenance.
HEATING ELEMENT: Copper clad steel sheath element with continuously brazed steel fins formed to allow side draw through air flow.
OVERHEAT PROTECTION: All units come equipped with automatic reset type limit controls to de-energize the heater should an over-temperature situation occur.
FAN and MOTOR: Totally enclosed, 1-speed, 1-phase, permanently lubricated, thermally protected motors with unit bearings on 3 KW - 20 KW models. Totally enclosed, 2-speed, 1-phase, permanently lubricated, thermally protected motors with sleeve bearings on 25 KW - 50 KW models. All motors mounted with rubber insulators to minimize vibration & noise. Fan over-ride purges unit of residual heat at shutdown.
LOUVER ASSEMBLY: Louvers are individually adjustable for directional control of air flow up to 15 degrees from straight horizontal. Optional diffusers available for down flow (vertical discharge) applications.
TEMPERATURE CONTROLS: Optional low voltage and line voltage thermostats are available with an adjustable temperature range of 40F to 90F. Units with model numbers ending in CA1 are factory wired for low voltage controls. 25 KW through 50 KW units are designed for two stage heating operation.
The Markel 5100 Series Electric Unit Heaters (3.3KW thru 50KW) can be mounted for horizontal or vertical discharge.
Horizontal unit heaters are recommended in low bay areas with maximum 15 to 18 foot ceilings. These should be concentrated along outside wall or other areas of greatest heat loss; spaced to set up a generally circular air movement, each heater supporting the air stream of the other.
Markel HF3B5140CA1L Electric Unit Heater Installation Instructions
Markel HF3B5140CA1L Electric Unit Heater Sales Bulletin