Trane CAB-PRC001-EN Mechanical Specifications, Electric Heat Coil, Filters, Fresh Air Damper

Mechanical Specifications

Three-Way, Two-Position Control Valves Normally open three-way,two-position valves are rated for a maximum 25 psig (207 kPa) pressure differential across the valve. Normally closed three-way two- position valves are rated for a maximum 15 psig (103 kPa) pressure differential across the valve. All 3-way valve piping packages include a bypass line with a balance fitting to set flow through the bypass line. The balance fitting has a maximum working pressure of 150 psig (1,034 kPa). The valves are also available with a maximum close-off pressure of 50 psig (345 kPa). The valve actuator is easily removable for service without removing the valve body from piping.

Modulating Control Valves Two-way and three-way modulating valves are rated for a maximum 50 psig (345 kPa) pressure differential across the valve. Modulating valves are available in Cv values of 0.7, 1.5, 2.5 and 4.0.

All two-position and modulating control valves have a maximum working pressure of 300 psig (2,069 kPa). The maximum entering water temperature of the valve is 200 F (93 C).

Electric Heat Coil

Electric heating coils are available as the total source of heating on all Force-Flo™ cabinet heaters except inverted models. The electric heat coils are Nichrome elements with an open-wire design. Single stage coils are available on all units and two-stage coils are available on units with a Tracer ZN.520 controller. The electric heat operates at the same voltage as the unit. Therefore, only a single-point power connection is necessary.

All standard electric heat coils are UL listed and interlocked with the fan motor

switch. Therefore, electric heat operation is possible only when the fan is running. A transformer is supplied to eliminate the need for field installation of a step-down transformer. A unit-mounted magnetic contactor is supplied on all voltages. A high temperature cutout with automatic reset is provided as an integral part of the elements to de-energize the electric heat in the event of an overheat condition.

Filters

Filters are concealed from sight and easily removable. Filters are located behind an integral access door on horizontal type units. Filters are either 1” (25 mm) throwaway or 1”(25 mm) pleated media throwaway. Pleated media filters are Farr 30/30.

Fresh Air Damper

A fresh air opening with damper is a factory-installed option. Dampers are constructed of 18-gauge steel. Fresh air is sealed off with gasket material when the damper is set in the closed position. Return and fresh air mixes when the damper is open.

Manual Damper

The manual damper is field-adjustable to allow zero to 100 percent fresh air. The automatic two-position damper is accompanied by a factory-installed and wired two-position (spring-return) actuator.

Auto Two-Position Damper

The auto two-position damper is factory set at 25 percent when open. The damper can be set in the field to allow from zero to 50 percent fresh air.

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