Trane RT-PRC031-EN manual Mechanical Specifications, General, Electrical System

Mechanical Specifications

General

Units shall be specifically designed for outdoor air handler installation on a roof curb and be completely factory assembled and tested, piped, internally wired and shipped in one piece.

Air handlers shall be available as either no cooling or chilled water cooling units. Heat options include natural gas, electric, hot water, steam or no heat. Filters, outside air system, exhaust air system, optional non-fused disconnect switches and all operating and safety controls shall be furnished factory installed.

positive latching at three points. Access doors shall provide a door stop mechanism to latch the door in the open position to prevent unsafe door closure by wind.

Doors of laminated double wall construction with a polyurethane foam core between the exterior sheet metal pane and the interior liner, with an insulating value of R8 shall be provided on the air handler's serviceable compartments such as return/exhaust fan, filters, coil and blank sections. Two single wall doors shall be provided for access to the control panel.

Electrical System

Convenience Outlet

A 15A, 115V Ground Fault Interrupter convenience outlet shall be wired and powered from a factory mounted transformer. A unit mounted, non-fused disconnect with external handle is furnished with the convenience outlet.

Non-Fused Disconnect Switch

An external handle mounted on the control box door shall be provided to disconnect unit power.

All units shall be UL/CSA approved and factory run tested. All units shall also be compliant with IBC Seismic requirements. All units shall have decals and tags to aid in service and indicate caution areas. Electrical diagrams shall be printed on long life water resistant material and shall ship attached to control panel doors.

Casing

Exterior panels shall be zinc coated galvanized steel, phosphatized and painted with a slate grey air-dry finish durable enough to withstand a minimum of 500 hours consecutive salt spray application in accordance with standard ASTM B117. Screws shall be coated with zinc-plus-zinc chromate.

The Air Handler shall be laminated double-wall construction with polyurethane foam core between sheet metal panels and liners. Insulation value shall be R8. All interior surfaces shall be suitable for cleaning per ASHRAE 62. All access doors and panels shall have neoprene gaskets. Unit base shall be watertight with heavy gauge formed load bearing members and curb overhang. Unit lifting lugs shall accept chains or cables for rigging. Lifting lugs shall also serve as unit tie down points.

Access Doors

Access doors shall be hinged with a single, exterior mounted, height and tension adjustable, handle to provide

Blank Sections

A four or eight foot blank section of laminated double wall construction with a polyurethane foam core between the exterior sheet metal panel and the interior liner, with an insulating value of R8 shall be provided with similarly built, hinged, access doors on either side

Airflow Path

Unit shall have downflow discharge conditioned air path or horizontal discharge. Return airflow path shall be either upflow or horizontal.

Burglar Bar

A grate system shall be installed in supply and return air duct connection areas on non-horizontal airflow path units to minimize unwanted intrusion into duct systems.

Belt Guard

Supply and exhaust fans shall have a universal size belt guard to accommodate any applicable drive configuration. The guard totally encloses the drive system and is provided with a two-piece removable front panel for servicing. Return fan guards shall be individually sized with a single piece removable panel for servicing.

Unit Interrupt Rating

A 65000 Amp rating (480V) and 25000 Amp rating (600V) shall be applied to the unit enclosure using a non-fused circuit breaker for disconnect switch purposes. Fan motors and electric heat circuits shall be provided with series rated circuit breakers that will provide the unit rated level of protection. The unit shall be marked with approved UL markings and will adhere to UL 508A regulations.

Marine Lights (Customer Powered)

A 120V master light switch shall be factory installed in the main unit control box for lighting control. The master switch shall be wired into an isolated terminal block with access for customer provided service. Marine light fixtures shall be supplied with 150W incandescent bulbs. Marine light fixtures shall be placed in the Supply Section (2), Fresh Air Section (1), Return Section (1), and Extended Casing Section (1) for units without Heat.

Supply/Exhaust/Return Motors

Supply, exhaust/return motors are either standard efficiency open drip- proof, high efficiency open drip- proof, or high efficiency totally enclosed fan cooled. All supply, exhaust/return motors meet the U.S. Energy Policy Act of 1992 (EPACT).

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