Low Profile Unit Cooler (Models HTA; HTE; HTH)The Low Profile Unit Cooler is the original low profile unit cooler that has established an industry standard as being the all purpose design for walk-in coolers, freezers and other applications. They feature an air draw-through design offering air, electric and hot gas defrost models.Sizes:There are 35 sizes available with 3,700 to 39,000 BTUH at a 10-¦ TD ranging from 740 to 4,980 cfm. One through six fan models are available.Housing:Rust-free, heavy gauge, textured Aluminum casing is light weight yet durable. Each fan section is baffled to prevent short cycling of the air. The unit is designed to mount flush to the ceiling and meets all NSF requirements. Slotted hangers are provided for easy installation. Drain fittings are installed in the horizontal position to gain more usable headroom in low ceiling applications. The end panels now are hinged to open up out for easy access to both the piping and electrical ends. Optional expansion valves can be conveniently installed inside the cabinet.Coil:Seamless Copper tubes are staggered and mechanically expanded into corrugated Aluminum fins and heavy gauge tube sheets to achieve maximum heat transfer and strength. Die formed fin collars provide even fin spacing. Fin spacings available are 4, 6, and 8 fins per inch. Sweat connections are standard on all models and optional field installed flare connection kits are available at no extra charge.Motors:All motors are 1/20 HP, permanently lubricated, ball bearing, with thermal overload protection. Available in 115V, 208/230V and optional 460V, single Phase. Optional high efficiency PSC motors are available in 115V and 230V.Fans:Heavy duty 12 Aluminum fans are balanced to provide vibration-free operation. Our new low throw black plastic fan guards have an improved air pattern. The optional epoxy resin high throw fan guard moves air up to 50 feet.Air Defrost: All models with the prefix GÇ£HTA are designed for use in coolers of 35-¦F and warmer. Complete air defrost systems for off-cycle or timed air defrost are available.Electrical: Available in 115V, 208/230V, and 460V. All components are factory wired to convenient screw-type terminal strips. A large compartment is supplied internal to the unit for all electrical components and is easily accessible by removing the end panel. All models are UL & CUL listed.Electric Defrost: Available on all models with the prefix GÇ£HTE. Designed for use where electric heat is used to defrost. Placement of the heaters internal to the coil allows for an extremely rapid and efficient defrost. This arrangement enables the heat to be conducted through the fins from the center out for an even defrost pattern. All heaters are wired to a terminal strip to allow a quick field change-over from single phase to three phase, 230V to 460V and vice versa. A lower heater is installed close to the drain pan for fast, reliable drainage. A defrost termination thermostat (DT) terminates the defrost cycle when the temperature is satisfied. A heater safety thermostat is installed to prevent heaters from overheating above 75-¦ in case of DT failure. All heaters are flexible and can be easily replaced within 12 inches of the end of the units. A fan delay thermostat is supplied to allow the warm coil to cool after a defrost cycle prior to the fans turning on.Hot Gas Defrost: Two types available - Re-Evap models with the prefix GÇ£HTH and reverse cycle with the prefix GÇ£HTG. All models include a fixed DTFD factory wired and a hot gas drain pan circuit to defrost the drain pan. On all Hot Gas models, the drain fitting is located on the left-hand rear of the unit when facing the fan guards. Re-evap models include a Heat Exchanger-Re-Evaporator shipped together with the unit for field installation. Contact factory for piping information.Optional Features: High efficiency PSC fan motors 460 volt motors and heaters Coated Aluminum fins or Copper Fins Baked white enamel housing Epoxy resin high throw guards for up to 50 ft. Reheat kits (not UL listed) Factory mounted expansion valves