To Next PageTo Next Page
Need help?Do you have a question about the Trane OXBOX J4AH4P18A1A00AA and is the answer not in the manual?
Provides detailed physical dimensions and weight for various model sizes.
Details on configuring the air handler for vertical upflow installation.
Instructions for converting the unit to a vertical downflow configuration.
Guidance on horizontal installation, including right and left configurations.
Specific considerations for installing the air handler in unconditioned spaces.
Guidelines for connecting main power supply to the unit.
Instructions for making low-voltage control wiring connections.
Essential procedures for safely grounding the air handler unit.
Presents electrical specifications, voltage, amperage, and circuit protection data.
Details on minimum circuit ampacity and maximum overcurrent protection for electric heater kits.
Instructions for proper installation and routing of condensate drain lines.
Step-by-step guide for removing, cleaning, and installing air filters.
This document provides installation, adjustment, and operation instructions for the Oxbox J4AH4P Series High-Efficiency Air Handlers, designed for 1.5-5 ton systems using R410A or R22 refrigerant. It is intended for qualified, licensed service personnel to ensure proper and safe installation and maintenance.
The Oxbox J4AH4P Series Air Handlers are designed to provide conditioned air as part of a heating and air-conditioning system. These units are versatile, supporting multi-position installation, including upflow, downflow, horizontal right, or horizontal left configurations. They are equipped with multi-speed blower motors, allowing for a selection of air volumes to match various applications and desired airflow requirements. The units are compatible with field-installed electric heater kits, available in 5, 7.5, 10, 15, and 20 kW options, which can be added as accessories to provide supplemental heating. The air handlers are designed to work with both AC and heat pump systems, with specific control wiring diagrams provided for each. They feature factory-sealed cabinets, certified to achieve a 2% or less air leakage rate at 1.0 inch water column, contributing to energy efficiency.
The air handlers offer flexible installation options to accommodate different spatial requirements. The default factory configuration is vertical upflow or horizontal right, but units can be field-converted to horizontal left or downflow. For vertical downflow conversion, the indoor coil assembly is removed and reinstalled 180 degrees from its original position. Similarly, for horizontal left conversion, the indoor coil assembly is rotated 180 degrees. Multiple electrical entry locations are provided for convenience during wiring. The units include an integrated filter rack with tool-less door access, simplifying filter maintenance. Condensate drainage is managed by primary and secondary condensate drain fittings, with the drain pan made of polymer with a UVC inhibitor. Horizontal and vertical condensate drain pans are standard, and secondary drain pan kits are recommended for horizontal installations over finished ceilings or living spaces to prevent potential water damage. The unit must be installed in a level position to ensure proper condensation drainage, though a slight rise (up to 1/4 inch) towards the drain is permissible. Proper grounding is essential for safety, and connections for control wiring are made via low voltage pigtails extending from the top of the air handler in an upflow position, or through knockouts on the sides.
Ease of maintenance is a key design aspect of the J4AH4P Series Air Handlers. The units feature a dual front panel design, which allows for convenient access to internal components. Both the blower and coil assemblies are designed to easily slide out, facilitating inspection, cleaning, or replacement. The fully-insulated cabinet design helps maintain thermal performance and reduces condensation on the exterior, especially in hot and humid environments. The integrated filter rack with tool-less door access makes filter removal and cleaning straightforward. Filters are not factory-installed and must be added during installation. Regular filter cleaning or replacement is crucial for maintaining optimal airflow and system performance, as reduced airflow can shorten the lifespan of major components. The manual provides instructions for removing and cleaning the air filter, recommending vacuuming or using pure water with a soft brush and mild detergent for heavy dust accumulation. Provisions for disconnecting and cleaning the primary drain line are included, with a recommended 3-inch trap installed as close to the unit as possible to ensure complete drainage and prevent blockages. The design also allows for easy replacement of the piston to a TXV (Thermostatic Expansion Valve), if required for specific system combinations or efficiency ratings. Before any servicing or installation, it is critical to disconnect all power to the unit to prevent electrical shock. The manual emphasizes that maintenance should be performed by trained, qualified service personnel, with consumer service limited to filter cleaning/replacement.
General| Cooling Capacity | 18, 000 BTU/h |
|---|---|
| SEER Rating | Up to 14 SEER |
| Refrigerant Type | R-410A |
| Voltage | 208/230 V |
| Phase | 1 |
| Operating Ambient Temperature | Up to 115°F |
| HSPF Rating | Not Applicable |
| Warranty | 10-Year Limited Warranty |
