![FEATURES](/images/new-backgrounds/35144/351447x1.webp)
FEATURES
All models are available with a wide variety of factory- mounted options such as stainless steel heat exchangers, phase monitor, dirty filter switch, and coil guard to make them suitable for almost every application.
All units are | • |
base rails with holes in the four corners for overhead rigging. |
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Every unit is completely piped, wired, charged and tested at |
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the factory to simplify the field installation and to provide |
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years of dependable operation. |
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All models (including those with an economizer) are suitable |
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for either bottom or horizontal duct connections. Models with |
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factory installed power exhaust are suitable for bottom |
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duct connections only. For bottom duct, you remove the |
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sheet metal panels from the supply and return air openings |
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through the base of the unit. For horizontal duct, you replace |
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the supply and return air panels on the rear of the unit with a |
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side duct flange accessory. |
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All models are available with these “factory mounted” outdoor |
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air damper options: |
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•Single enthalpy economizer with or without power exhaust
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•Motorized outdoor air damper
•Barometric Relief Damper
A fixed outdoor air intake assembly will be shipped in the return air compartment of all units ordered without an econo- mizer or motorized outdoor air damper option. The assembly includes a rain hood with a damper that can be set for 10, 15 or 25% outdoor air. With bottom duct connections, the intake damper assembly should be mounted over the opening in the return air panel. With horizontal ductwork, it should be mounted on the return air duct.
All supply air blowers are equipped with a belt drive that can be adjusted to meet the exact requirements of the job. A high static drive option is available for applications with a higher CFM and/or static pressure requirement. A variable air volume (VAV) option using a variable frequency drive is available for applications requiring a constant supply duct pressure. A dif- ferential pressure transducer is used to monitor supply duct static pressure and return a speed reference signal to the VFD to control the output of the indoor blower motor.
All compressors include scroll compressors and internal pres- sure relief. Every refrigerant circuit includes an expansion valve, a liquid line
•Simplicity® Controls - Simplicity® control boards have standardized a number of features previously available only as options or by utilizing additional controls.
•Low Ambient - An integrated
The Simplicity® control board used in this product will effectively operate the cooling system down to 0°F when this product is applied in a comfort cooling application for people. An economizer is typically included in this type of application. When applying this product for process cooling applications (computer rooms, switchgear, etc.), please reference applications bulletin
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•Fan Delays - Fan on and fan off delays are fully pro- grammable. Furthermore, the heating and cooling fan delay times are independent of one another. All units are programmed with default values based upon their configuration of cooling and heat.
•Safety Monitoring - The control board monitors the high and
•Nuisance Trip Protection and Strikes - To prevent nuisance trouble calls, the control board uses a “three times, you’re out” philosophy. The high and
•On Board Diagnostics - Each alarm will energize a trouble light on the thermostat, if so equipped, and flash an alarm code on the control board LED. Each high and
4 | Johnson Controls Unitary Products |