Marley Engineered Products uhmt1 Unit Heater Thermostat

Product Description

The MARLEY ENGINEERED PRODUCTS uhmt1 is a single-pole unit heater thermostat designed for field installation on electric unit heaters operating at 120, 240, or 277 volt AC. Rated at 25 amps at 120/240 volts AC (resistive) and 22 amps at 277 volts AC (resistive), it provides reliable on/off temperature control across a range of 40 to 85 degrees F. The thermostat carries a 125 volt-amp power rating and is intended for licensed electricians and HVAC technicians performing installation or service on commercial or industrial electric heating equipment.

This thermostat is suited for use on wall-mounted or ceiling-mounted electric unit heaters in commercial, industrial, and light manufacturing environments. It replaces the need for a remote wall thermostat by mounting directly to compatible unit heater models. Typical applications include warehouses, garages, loading docks, and workshops where electric unit heaters provide zone or supplemental heat. The uhmt1 is listed for use on MUH and HUHAA series electric unit heaters from MARLEY ENGINEERED PRODUCTS.

Key Features

• Multi-voltage compatibility: 120, 240, and 277 volt AC in a single thermostat
• 25-amp current rating at 120/240 volts AC (resistive) for high-load heating circuits
• 22-amp rating at 277 volts AC (resistive) supports common commercial voltage configurations
• Temperature control range of 40 to 85 degrees F for wide ambient coverage
• 1-pole switch type for straightforward line-voltage wiring
• 125 volt-amp power rating

Compatibility

Designed for use on MUH and HUHAA series electric unit heaters manufactured by MARLEY ENGINEERED PRODUCTS.

Installation Notes

Installation should be performed by a licensed electrician or qualified HVAC technician in accordance with the National Electrical Code (NEC) and all applicable local codes. Disconnect and lock out all power to the unit heater before removing any covers or wiring the thermostat. Verify that the circuit voltage and amperage match the thermostat ratings before energizing. Follow the unit heater manufacturer wiring diagram when making connections.

Technical Specifications

• Voltage Rating: 120/240/277 volt AC
• Current Rating: 25 amps at 120/240 volt AC (resistive), 22 amps at 277 volt AC (resistive)
• Power Rating: 125 volt-amp
• Switch Type: 1-Pole
• Temperature Rating: 40 to 85 degrees F
• UNSPSC: 41112209

Standard Information

• Brand: MARLEY ENGINEERED PRODUCTS
• Manufacturer Part Number: uhmt1