Markel H3453T1D Heavy-Duty Fan Forced Wall Heater, 3 KW, 240V/1Ph

- Powder coated bar stock steel tamper proof grille, extruded Aluminum and 16 gauge housing.
- In-built tamper proof disconnecting thermostat.
- Manual reset thermal limit switch.
- Corrosion resistant steel tubular element with brazed steel fins.
- Permanently lubricated, unit bearing, shaded pole motor with impedance protection.
- Propeller type fan blade: 1400 RPM motor.
- Wall box included with heater.
- Made in U.S.A.
- Series 3450 Rough-In Dimensions: 23 5/16 inch H x 14 7/16 inch W x 4 1/8 inch D.
- Series 3450 Grill Dimensions: 25 inch H x 17 1/2 inch W.

Additional Information

ENCLOSURE: Heater front shall withstand 10.8 ft. lbs. (324 poundals) impact and 400 lbs. static force applied to an 8 sq. in. area at center grille location with less than 1⁄16 inch permanent distortion. The combination return and supply grille assembly shall be constructed of 1⁄16 inch x 3⁄8 inch rounded edge horizontal steel louvers which shall be spaced for maximum opening of 1⁄4 inc. Louvers shall be welded at every intersection to three evenly spaced 1/16 inch diameter vertical meambers and completely framed in a heavy gauge natural anodized Aluminum extrusion. Front assembly shall be attached to the chassis by hidden tamper-resistant (Allen-head) machine screws. All other parts shall be 16 gauge steel Zinc coated, both sides finished in a bronze colored baked powder coat finish.

MOTOR: Motor shall be a permanently lubricated unit bearing, totally enclosed shaded pole type with impedance protection. Motors shall operate at no more than 1400 RPM and shall be same voltage as the heater. A protective shield shall surround the motor to separate return air from heated air.

PERFORMANCE: Heaters shall have a rating of 245 CFM at 660 F.P.M. with a maximum temperature rise of 64F.

ELEMENTS: Element assemblies shall consist of two or three corrosion resistant steel sheathed type elements mechanically bonded to common corrosion resistant steel fins. Each sheathed element shall consist of helically coiled Nickel Chromium alloy resistant wire completely embedded in and surrounded by Magnesium Oxide, enclosed and compacted into corrosion resistant steel sheaths. Elements shall have 2 inch cold conductor pins extending into the sheath and shall have a density of no more than 60 Watts per inch.

THERMAL OVERLOAD: Heaters shall be equipped with a manual reset thermal overload which disconnects elements and motor in the event normal operating temperatures are exceeded. For safety, if opened due to abnormal temperature, thermal overload shall remain open until manually reset. Automatic reset thermal overloads which allow the element to continue to cycle under abnormal conditions shall not be accepted.

3450 CONTROL SYSTEM SINGLE PHASE UNITS: Single phase heaters shall be provided with disconnect and thermostat. The disconnect switch will break all ungrounded conductors and shall be lockable per the N.E.C. The thermostat shall be of the tamper-proof hydraulic design with a temperature range of 40F - 110F. The heater will be provided with a tamper-proof cover to prevent adjustment by unauthorized personnel.

FACTORY MOUNTED CONTROL OPTIONS SINGLE PHASE UNITS (ORDERED SEPARATELY):
Markel-Factory-Installed-R1: Factory installed 24V contactor with a terminal block for connection to a low voltage wall mounted thermostat or BMS. 

Markel-Factory-Installed-A1: Factory installed 24V control transformer.