DURASTAR DRF2TA3624ASTNJB3F (01) PDF Document

The DURASTAR DRF2TA3624ASTNJB3F air handler includes a variety of features for performance and installation flexibility.

Core Features:

• Return Air Configuration: Supports Front or Bottom Return with an aluminum tube and fin coil.

• Metering Device: Equipped with a Thermal Expansion Valve (TXV) for cooling or heat pump operation.

• Installation: Comes with wall-hanging brackets and a built-in filter rack.

• Heater Kits: Features Molex Plug Connections for field-installed heater kits.

• Blower Motor: A Dual Voltage Direct Drive Blower with a multi-speed Constant Torque Motor (ECM).

• Drain Pan: Includes a Thermoplastic Drain Pan with bottom primary and secondary connections.

• Cabinet: Cabinet air leakage is less than 2% at 1 inch H2O when tested in accordance with ASHRAE Standard 193.

• Wiring: Can be field wired for single or two-stage applications.

Standard Equipment:

• Exclusive Incoloy sheath type electric heating elements.

• Field convertible air supply.

• Durable framed cleanable air filter.

• Indoor coil design provides low air side pressure drop, high performance, and compact size.

• PVC condensate elbow is standard on all coils.

• All indoor coils feature aluminum tubing and aluminum fins.

• Molded polymer corrosion-resistant condensate drain pan.

• Supply and return duct flanges.

• High and low voltage connection points located inside the cabinet.

• Concentric knockouts for power connection.

• Internal checked TX valves for quiet refrigerant metering.

• Front refrigerant and drain connection.

The model number provides specific details about the air handler’s configuration. Here is a breakdown:

The following table provides the dimensions, weights, and other specifications for the DURASTAR DRF2TA3624ASTNJB3F model.

The airflow operating limits for the DURASTAR DRF2TA3624ASTNJB3F, which has a model cabinet size of 24, are detailed in the table below. For optimal blower performance, operate the unit in the .3 [8 mm] to .7 inches [18 mm] W.C. external static range.

The airflow performance data for the DURASTAR DRF2TA3624ASTNJB3F (3 Tons) model with a constant torque (ECM) motor is shown below. This data reflects dry delivery with filter and heaters across a range of external static pressures.

The DURASTAR DRF2TA3624ASTNJB3F air handler has a 5-speed constant torque motor. The speed taps are configured for different applications, and the unit is shipped from the factory set to speed tap 5.

• Speed tap 1: For continuous fan operation. The airflow is always set at 50% of the speed tap 4 airflow.

• Speed tap 2 (low static) & speed tap 3 (high static): For lower tonnage models (1.5 or 2.5 tons).

• Speed tap 4 (low static) & speed tap 5 (high static): For higher tonnage models like the DRF2TA3624 (2.0 or 3.0 tons).

To adjust the speed, move the blue wire to the appropriate speed tap on the motor terminal block as required by the application needs.

• Use the low static speed taps (2 and 4) for external static pressures below 0.5″ WC.

• Use the high static speed taps (3 and 5) for external static pressures exceeding 0.5″ WC.

The electrical data for the blower motor only on a DURASTAR DRF2TA3624ASTNJB3F is as follows. Note that all blower motors are single-phase motors.

When installing a U.L. Listed original equipment manufacturer provided heater kit, the electrical requirements for the DURASTAR DRF2TA3624ASTNJB3F (listed as DRF2TA3636 in the table) are as follows:

Follow these guidelines for electrical power wiring and grounding:

• Code Compliance: Field wiring must comply with the National Electrical Code (C.E.C. in Canada) and any applicable local ordinances.

• Grounding: The product must be sufficiently grounded in accordance with all applicable codes.

• Conductors: Supply wiring must be 75°C minimum copper conductors only.

• Ampacity: Refer to the electrical data for the product’s Ampacity rating and circuit protection requirements.

• Grounding Lug: A grounding lug is provided and must be used.

• Circuit Protection: Supply circuit protective devices may be fuses or “HACR” type circuit breakers.

• Fuse Sizing: If a non-standard fuse size is specified, use the next size larger standard fuse.

• Voltage: Do not use 480 volts electrical heaters on 230 volts air handlers.

Several optional kits and accessories are available to enhance or modify the installation of the DURASTAR DRF2TA3624ASTNJB3F.

• Drain Pan Overflow Switch (RXHK-A01): This switch detects a condensate drain blockage and shuts down the outdoor unit to prevent water damage to the surrounding structure.

• Bottom Return Conversion Kit (RXHK-B02): Used to divert the return air from the standard front return to a bottom return configuration. The correct kit for the DRF2TA3624ASTNJB3F is RXHK-B02, which fits DRF2TA-FR36 models.

• Louvered Cabinet Grill (RXHK-C02): A decorative grill that covers the return air opening of the front return air handler. The correct kit for the DRF2TA3624ASTNJB3F is RXHK-C02, which fits DRF2TA-FR36 models.

• Decorative Wall Grill (RXHK-D01 or RXHK-D02): Used in applications where the air handler is installed in a closet or interior wall. It allows adequate return air back to the unit. Refer to the grill’s installation instructions for complete dimensional information.