DURASTAR DRF2TA3624ASTNJB8 (01) PDF Document

The DURASTAR DRF2TA3624ASTNJB8 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 DRF2TA3624ASTNJB8 breaks down as follows:

The standard equipment for the DURASTAR DRF2TA3624ASTNJB8 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

For optimal blower performance, operate the unit 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 operating limits for the cabinet size are as follows:

The airflow performance data for the DURASTAR DRF2TA3624ASTNJB8 (3 Tons model) is based on a 10×8 1/2 Hp 2-speed dual voltage motor, providing an air-flow range of 1306/1040 (Max/Min) CFM.

The DURASTAR DRF2TA3624ASTNJB8 air handler has a 5-speed constant torque motor. The speed taps are configured for different applications:

• Speed tap 1 is for continuous fan.

• Speed tap 2 (low static) and speed tap 3 (high static) are for lower tonnage applications (1.5 or 2.5 tons).

• Speed tap 4 (low static) and speed tap 5 (high static) are for higher tonnage applications (2.0 or 3.0 tons).

The air handler is shipped from the factory set to speed tap 5.

Use the low static speed tap (2 or 4) for external static pressures below 0.5″ WC. Use the high static speed tap (3 or 5) for external static pressures exceeding 0.5″ WC. To change speeds, move the blue wire to the appropriate speed tap on the motor terminal block as required by the application.

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

*Blower motors are all single phase motors.

• Electric heater BTUH = (heater watts + motor watts) x 3.414 (see airflow table for motor watts.)

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

• Largest motor load is included in single circuit or circuit 1 of multiple circuits.

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

• Field wiring must comply with the National Electrical Code.

• This product must be sufficiently grounded in accordance with (C.E.C. in Canada) and any applicable local ordinance.

• Supply wiring must be 75°C minimum copper conductors only, in accordance with the National Electrical Code (C.E.C. in Canada) and any applicable Local ordinance.

• See electrical data for product Ampacity rating and Circuit Protector requirement.

• A grounding lug is provided.

The following accessories and kits are available for the DURASTAR DRF2TA3624ASTNJB8:

• Drain Pan Over Flow Switch RXHK-A01: This switch is used to detect condensate drain blockage and will shut down the outdoor unit to prevent structural damage to the surrounding structures of the air handler.

• Bottom Return Conversion Kit RXHK-B02: This kit is used to divert the return air from the factory standard front return to a bottom return. Accessory Number RXHK-B02 is compatible with indoor unit DRF2TA-FR36.

• Louvered Cabinet Grill RXHK-C02: This is a decorative grill that covers the return air opening of the front return air handler. Accessory Number RXHK-C02 is compatible with indoor unit DRF2TA-FR36.

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