Indeeco - Ultra-Safe™ EXP Explosion-proof Unit Heater

The Indeeco Ultra-Safe™ EXP unit heater is designed for maximum safety and flexibility. Featuring a broad range of stock designs and special options, it offers one of the industry’s lowest Ignition Temperature Code ratings at 320°F (160°C)—making it an ultra-safe choice for hazardous locations.

Now available for wet locations, the Ultra-Safe™ EXP heater combines rugged construction with versatile mounting and electrical options, ensuring reliable heat in even the most challenging environments.

Applications | Aircraft Hangars/Service Areas, Chemical Storage/Handling Areas, Coal Preparation Plants, Compressor Stations, Grain Elevators, Oil Refineries and Rigs, Paint Storage Areas, Petrochemical Plants, Sewage Pump Stations/Treatment Plants (Option C1 recommended), Spray Booths

Specification

Optional Wet Location Features
- Washable per IP55
- IP55 Motor
- Type 4 outdoor rated enclosure and optional features
- Meets rain-tight requirements of UL 1004-1
Industry’s Lowest Ignition Temperature Code Rating
T3C, 320°F (160°C)
Dual Overtemperature Protection
With both automatic and manual reset overtemperature cutouts for additional safety.
Nontoxic Propylene Glycol Heat Transfer Fluid
Low 70 PSIG Relief Valve Setting:
This assures that in an emergency, the initial escaping vapor
Corrosion Resistant Options
Indeeco offers three constructions suitable for most applications.
1. Standard construction for use in dry non-corrosive areas includes: a welded steel heat exchanger; a powder-coated cabinet.
2. A 316 stainless steel construction suitable for Waste Water Treatment Plants includes: 316 stainless steel heat exchanger, headers, and tubes with aluminum fins; stainless steel cabinet; corrosion-resistant hardware.
3. The third construction is suitable for use in Chemical Plants where chlorides are present and includes: Heresite® coated heat exchanger, cabinet, fan blade; corrosion resistant hardware.
Heat Exchanger
Efficient liquid-to-air design utilizes an all welded steel headers and finned tube construction with spiral wound aluminum fins. Industrial grade INDEECO heating elements are immersed in a nontoxic, inhibited, propylene glycol heat transfer fluid that provides freeze protection down to -49°F (-45°C). The heat exchanger is hydrostatically tested at 350 psig. A pressure relief valve provides excess pressure protection and is set at 70 psig.
Fan Motor Assembly
Consists of an explosion-proof motor fitted with an aluminum fan blade. The motor has double- shielded, permanently lubricated ball bearings and automatic reset line breaking thermal overload protection. Motors furnished on standard units operate at line voltage and are prewired to the control enclosure so separate field wiring to the motor is not required. The standard motor is rated for Class I, Groups C and D, Class II, Groups F and G. The minimum operating temperature is -14°F (-25°C) and the minimum storage temperature is -49°F (-45°C). Download the product data sheet for optional motor ratings.
Cabinet/Louvers
Industrial grade, corrosion resistant construction fabricated from beige powder coated 14-gauge galvanized steel. The adjustable louvers have minimum opening safety stops.
Controls
Factory mounted on the unit heater. Standard built-in controls include automatic and manual reset overtemperature cutouts, controlling magnetic contactor, and 24-volt control circuit transformer housed in a NEMA 7, 9 cast aluminum enclosure.