All wheels are to be balanced, both statically and dynamically. The motor shall have an adjustable base for tensioning of belts and a locking mechanism to prevent the motor from shifting. The blower fixed pulley shall be cast iron, keyed to the shaft, and the motor sheave shall have an adjustable pitch in order to allow for field adjustment of blower speed in order to match the system airflow requirements. Blower motor shall be open drip proof. Motor shall have internal overload protection and permanently lubricated ball bearings. Motor shall be rigidly mounted to an adjustable motor frame. Evaporator section include a factory-installed, pressure differential type loss of air flow proving switch that is set to read pressure drop across the evaporator blower section. Upon loss of air flow, this control shall terminate system operation. 2.8 Electrical System A. The electrical system shall conform to National Electric Code (NEC) requirements. B. OmegaAir unit shall have a single isolated electrical control panel located out of the air stream. Access to the control panel shall be from the front of the unit. A single point power connection shall be provided through the [left] [right] side of the cabinet. Power shall be connected to factory installed terminal blocks. Ground lug shall be affixed in the control panel. C. All electrical components (blower compressor(s), etc.) shall have individual definite purpose contactors. D. A low-voltage transformer, with protection, shall be provided to supply 24 VAC to the control circuit. E. Terminal strips and blocks shall be factory installed internal to the control box and be clearly labeled for control wiring connections. External control wires shall enter the OmegaAir cabinet through the [left] [right] side of the cabinet. F. Terminal blocks shall be factory provided for a Remote On / Off switch capability. Controls shall be suitably wired and enabled to accept a signal from a field supplied Remote On / Off switch.
All wheels are to be balanced, both statically and dynamically. The motor shall have an adjustable base for tensioning of belts and a locking mechanism to prevent the motor from shifting. The blower fixed pulley shall be cast iron, keyed to the shaft, and the motor sheave shall have an adjustable pitch in order to allow for field adjustment of blower speed in order to match the system airflow requirements. Blower motor shall be open drip proof. Motor shall have internal overload protection and permanently lubricated ball bearings. Motor shall be rigidly mounted to an adjustable motor frame. Evaporator section include a factory-installed, pressure differential type loss of air flow proving switch that is set to read pressure drop across the evaporator blower section. Upon loss of air flow, this control shall terminate system operation. 2.8 Electrical System A. The electrical system shall conform to National Electric Code (NEC) requirements. B. OmegaAir unit shall have a single isolated electrical control panel located out of the air stream. Access to the control panel shall be from the front of the unit. A single point power connection shall be provided through the [left] [right] side of the cabinet. Power shall be connected to factory installed terminal blocks. Ground lug shall be affixed in the control panel. C. All electrical components (blower compressor(s), etc.) shall have individual definite purpose contactors. D. A low-voltage transformer, with protection, shall be provided to supply 24 VAC to the control circuit. E. Terminal strips and blocks shall be factory installed internal to the control box and be clearly labeled for control wiring connections. External control wires shall enter the OmegaAir cabinet through the [left] [right] side of the cabinet. F. Terminal blocks shall be factory provided for a Remote On / Off switch capability. Controls shall be suitably wired and enabled to accept a signal from a field supplied Remote On / Off switch.
OmegaAir-Engineering-Guide-Spec_Vertical-Air-Cooled-0914.docx