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Lists key advantages and features of the electric heaters, highlighting their design and warranty.
Lists key advantages and features of the electric heaters, highlighting their design and warranty.
This document serves as an installer's guide for supplementary electric heaters designed for use with TEM4, TEM6, TEM8, and A4AH4 air handlers. It outlines the installation process, general information, safety warnings, and heater tables.
The supplementary electric heaters provide additional heating for air handler units. These heaters are designed to supply power directly to the air handler, eliminating the need for separate additional circuits. They utilize a single polarized plug for both power and control wiring, simplifying the connection between the heater and the air handler. The heaters are available in various models and configurations, supporting different voltage requirements (208V and 240V) and power outputs (kW and BTUH). They are designed to work with specific air handler models, and their compatibility should be verified using the unit heater label and the provided heater data tables.
The installation process for these electric heaters involves several key steps. First, the blower access panel of the air handler must be removed. The heater knock-out plate, located at the rear of the control box, needs to be cut out using tin snips and then discarded. The heater is then slid into the opening and secured to the control box with four screws. For models requiring a breaker plate assembly, it is slid into the appropriate locking tabs on the top panel of the air handler and rotated into place. The document specifies different breaker mount locations for various air handler models and heater sizes (e.g., left side for TEM8A0B24/30 air handlers and 25 kW heaters, center for other 4-20 kW heaters).
Wiring connections must adhere to applicable field wiring diagrams and national, state, and local electrical codes. A polarized harness plug connects the heater to the air handler. The installer must refer to the heater minimum airflow chart or the unit rating nameplate to determine the correct minimum blower speed tap for the installed heater. All field wiring should be connected according to the air handler installation guide.
For LUG models, it's important not to remove knockouts or insulation. For other models, appropriate breaker knock-out plates from the blower access panel must be removed, along with any insulation behind them. A Breaker Seal Kit, if applicable, should be installed following its specific instructions. After installation, the blower access panel is reinstalled, ensuring proper alignment of the breakers. The unit nameplate must be updated to reflect the installed heater, either by checking off the installed heater or applying a new secondary nameplate label. For TEM4/A4AH4 air handlers, specific instructions are provided for cutting and stripping low voltage field wires for thermostat wiring termination. For TEM8 models, the heater size must be set in the Configuration Menu.
The heaters are designed to work with various airflow settings (Low, Med-Lo, Med-Hi, High) and dip switch configurations (Switch 7 and Switch 8) to achieve different nominal airflow rates. The document includes detailed tables for minimum heater airflow (CFM) with and without a heat pump, as well as airflow performance with auxiliary heat. Heater pressure drop tables are also provided, indicating the air pressure drop (in inches W.G.) for different airflow rates and numbers of heater racks.
The document emphasizes safety during installation and servicing. A prominent warning highlights the presence of fiberglass wool insulation, noting that fiberglass dust and ceramic fibers are believed to cause cancer through inhalation and can cause respiratory, skin, or eye irritation. Precautionary measures include avoiding breathing fiberglass dust, using a NIOSH approved dust/mist respirator, and wearing long-sleeved, loose-fitting clothing, gloves, and eye protection. Clothes should be washed separately from other clothing, and the washer should be rinsed thoroughly. Operations that generate fiber concentrations, such as sawing, blowing, tear-out, and spraying, may require additional respiratory protection. First aid measures for eye contact (flush with water) and skin contact (wash with soap and warm water) are also provided.
Another critical safety warning concerns hazardous voltage, instructing installers to disconnect power before servicing the unit. The document also cautions against touching the thermal limit discs, as pressing them can result in product malfunction.
The heater tables provide essential information for maintenance and troubleshooting, including electrical data such as kW, BTUH, heater amps per circuit, minimum circuit ampacity, and maximum overload protection for various heater models and voltages. This information is crucial for ensuring proper electrical sizing and protection of the branch circuit, although the supplied circuit breakers are not intended to provide overcurrent protection for the branch circuit itself. The document states that the branch circuit(s) must be sized and protected according to the unit nameplate.
General| Model | BAYHTR1504BRKC |
|---|---|
| Type | Electric Heater |
| Voltage | 208/240V |
| Wattage | 15 kW |
| Phase | 1 |
| Heating Element Type | Open Coil |
| Maximum Airflow | 2000 CFM |
| Maximum Overcurrent Protection | 80 A |
