Description

“Caloritech Type “”PH”” Electric Control Panel Enclosure Heaters are fan-forced air heaters designed to control the environment within enclosures by maintaining a stable temperature. Effects of low temperatures such as corrosion, freezing or condensation will adversely affect the components inside control panels. The Caloritech PH enclosure heater provides an optimal performance environment for the critical components contained within the control panel. Features + Benefits Fan AUTO/ON switch to prolong motor life Externally adjustable thermostat 0°F to 100°F (-18°C to 38°C) Pilot light for ‘HEAT ON? indication The terminal strip provides quick installation with both stranded and solid wire High-temperature safety protection Optional DIN rail mounting CSA C/US approved Aluminum alloy outer casing protects interior components Screw fasteners provide easy access to components inside the casing Heater Selection – The wattage requirement is determined from a consideration of the surface area, insulation properties of the enclosure or space, and the temperature difference between the ambient and the enclosure. For small enclosures (less than 100ft.2 surface area) conservative values for heat losses are as shown in Table 1. Example: To find wattage requirements in an uninsulated enclosure 2? x 3? x1?, which must be held at 40?F in a 10?F outdoor ambient, with internal electrical components that generate 80 watts. Surface Area = 2[(2? x 3?) + (2? x 1?) + (3? x 1?)] = 22ft.2. From Table 1 an uninsulated outdoor enclosure requires 7 watts per square foot for each 10?F temperature difference. Temperature Difference = 40?F – 10?F = 30?F Wattage Required = (30?F ÷ 10?F) x 7 W/ft2 x 22ft.2 = 462 watts Heater Wattage = Wattage required – component wattage = 462 – 80 = 382 watts. Use one PH400 rated at 400 watts. For enclosures requiring more than 800 watts, two or more PH heaters may be used. Installation – The Caloritech PH enclosure heater should be installed in the center of the cabinet and as low as practical for the best possible heat distribution. The optimum efficiency is obtained when the unit is mounted in a vertical position allowing the top air vents to release the heated air in the most effective manner. The enclosures should be sealed and free from dust and dirt. Do not install the heaters on wood, cardboard, or other flammable panels. Heat Type: Electric Fan-Forced Air Heaters Thermostat Type: Externally Adjustable Thermostat 0°F to 100°F (-18°C to 38°C) Fan AUTO/ON switch to prolong motor life Pilot light for ‘HEAT ON? indication Terminal strip provides quick installation with both stranded and solid wire High temperature safety protection Optional DIN rail mounting CSA C/US approved Light Weight Low Maintenance Aluminum alloy outer casing protects interior components Screw fasteners provide easy access to components inside casing Model Number: PH20011. Age Group: adult.”