Features of Markel HF3B51100CA1 Electric Unit Heater

The Markel 5100 Series Horizontal Electric Fan Forced Unit Heater is a commercial and Industrial grade unit heater.

• CONSTRUCTION: Heavy Gauge steel cabinet with powder coated finish and control compartment housing a master terminal board. The control compartment allows for access through a hinged and latched door, simplifying wiring, installation, and maintenance.
• HEATING ELEMENT: The heating element is a 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 manual reset type limit controls to de-energize the heater should an over-temperature situation occur.
• FAN & MOTOR: Single speed, single phase permanently lubricated, thermally protected motors with ball bearings. The fan override purges the unit of residual heat at shutdown.
• FIELD INSTALLED OPTIONS: Summer fan switch to operate the fan only, and a heat stratification thermostat for high bay areas.
• HEATER STAGING: 60 KW and 70 KW are three stage; 80 KW, 90 KW, & 100 KW are four stage.
• SC5100 FACTORY INSTALLED ELECTRONIC STEP CONTROLLER: The optional factory installed step controller is a first on last off sequencer that will cycle the unit heater stages through an optional wall thermostat. Additionally, the step controller can be controlled by any building management system with 4 to 20 MA or 0 - 10 VDC field supplied control signal.

Additional Information

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.