DURASTAR DRF2TA3624ASTNJB5F (01) PDF Document

The DURASTAR DRF2TA3624ASTNJB5F air handler includes the following features and benefits:

• Front or Bottom Return with aluminum tube and fin coil

• TXV for cooling or heat pump operation

• Wall-hanging brackets

• Built in Filter Rack

• Molex Plug Connections for field installed heater kits

• Dual Voltage Direct Drive Blower with multi-speed motor

• Thermoplastic Drain Pan with bottom primary and secondary connections

• Optional Decorative Grill for front return applications

• Optional Factory Installed Condensate Float Switch which shuts off the outdoor unit in the event the condensate pan becomes clogged

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

• Can be field wired for single or two stage applications

The model number for the DURASTAR DRF2TA3624ASTNJB5F series provides specific details about the unit’s configuration. The breakdown is as follows:

The standard equipment for the DURASTAR DRF2TA3624ASTNJB5F includes:

• 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 have aluminum tubing and aluminum fins

• Molded polymer corrosion resistant condensate drain pan

• Supply and return duct flanges

• High and low voltage connection points inside cabinet

• Concentric knockouts provided for power connection with hole size up to 2 inches [51 mm] for 1 1/2 inch [38mm] conduit

• Internal checked TX valves for quiet refrigerant metering

• Front refrigerant and drain connection

The dimensions, weights, and other specifications for the DURASTAR DRF2TA3624ASTNJB5F series are detailed in the table below.

For optimal blower performance, the DURASTAR DRF2TA3624ASTNJB5F series should be operated in the .3 [8 mm] to .7 inches [18 mm] W.C. external static range. Units with coils should be applied with a minimum of .1 inch [3 mm] W.C. external static range. The specific operating limits are as follows:

The airflow performance data for the DURASTAR DRF2TA3624ASTNJB5F series with a Constant Torque (ECM) Motor is based on cooling performance with a coil and no filter. The table below shows CFM dry delivery, RPM, and Watts at various external static pressures.

The DURASTAR DRF2TA3624ASTNJB5F air handler has 5-speed constant torque motors. The speed taps are configured as follows:

• Speed tap 1: For continuous fan operation.

• Speed tap 2 (low static): For lower tonnage (1.5 or 2.5 tons) with external static pressures below 0.5″ WC.

• Speed tap 3 (high static): For lower tonnage (1.5 or 2.5 tons) with external static pressures exceeding 0.5″ WC.

• Speed tap 4 (low static): For higher tonnage (2.0 or 3.0 tons) with external static pressures below 0.5″ WC.

• Speed tap 5 (high static): For higher tonnage (2.0 or 3.0 tons) with external static pressures exceeding 0.5″ WC.

The unit is always shipped from the factory set to speed tap 5. To adjust, move the blue wire to the appropriate speed tap on the motor terminal block as required by the application needs.

The airflow for the continuous fan (speed tap 1) is always set at 50% of the speed tap 4 airflow.

The electrical data for the blower motor without electric heat for the DURASTAR DRF2TA3624ASTNJB5F series is as follows. Note that all blower motors are single phase motors.

When using an original equipment manufacturer provided heater kit with the DURASTAR DRF2TA3624ASTNJB5F, refer to the following electrical data. The table shows data for 208/240V.

Important Notes:

• Electric heater BTUH = (heater watts + motor watts) x 3.414.

• J voltage (230V) single phase air handler is designed to be used with single or three phase.

• Supply circuit protective devices may be fused or “HACR” type circuit breakers.

• If a non-standard fuse size is specified, use the next size larger standard fuse size. Without the heater, bring only two leads to the terminal block, cap, insulate, and fully secure the third lead.

• The largest motor load is included in a single circuit or circuit 1 of multiple circuits.

• Do not use 480 volts electrical heaters on 230 volts air handler.

For electrical wiring, power wiring, and grounding of the DURASTAR DRF2TA3624ASTNJB5F, follow these requirements:

• Field wiring must comply with the National Electrical Code and any applicable local ordinance.

• This product must be sufficiently grounded in accordance with the National Electrical Code and any applicable local ordinance.

• Supply wiring must be 75°C minimum copper conductors only, in compliance with local ordinances.

• Refer to the electrical data for the product Ampacity rating and Circuit information.

• A grounding lug is provided, as required for the protector.

Several optional kits and accessories are available for the DURASTAR DRF2TA3624ASTNJB5F air handler:

• Drain Pan Over Flow Switch RXHK-A01: This switch is used to detect condensate drain blockage. It will shut down the outdoor unit to prevent structural damage to the surrounding area if a blockage occurs.

• Bottom Return Conversion Kit RXHK-B01 / RXHK-B02: This kit is used to divert the return air from the standard front return to a bottom return configuration.

• Louvered Cabinet Grill RXHK-C01 / RXHK-C02: This is a decorative grill that covers the return air opening of the front return air handler.

• Decorative Wall Grill RXHK-D01 / RXHK-D02: This grill is used in applications where the air handler is installed in a closet or interior wall. It allows adequate return air back to the unit.