General Information, Unpacking, Description

GENERAL

GENERAL INFORMATION

The economizer should only be installed by a trained heating and air conditioning technician. These instructions serve as a guide to the technician installing the economizer package. They are not intended as a step by step procedure with which the mechanically inclined owner can install the package.

The economizer housing is shipped in one carton which contains the electrical harness, miscellaneous hardware and installation instructions.

The economizer installation requires an additional two stage cooling thermostat in place of the normal single stage cooling thermostat. Also additional low voltage wire will be required to transmit the second call (Y2) for cool. (I.E. use 6 conductor thermostat wire for an air conditioning unit and 9 conductor thermostat wire for heat pumps.) See Page 8 for required thermostats.

If using a Bard master controller, the MC91AE master controller is designed specifically to control two (2) redundant Bard wall mount units equipped with economizers.

Any wall mount unit equipped with an economizer must also have a low ambient control installed. This control can be factory installed or field installed. If field installed, use kit CMA-6 (air conditioner models) or CMH-7 (heat pump models).

UNPACKING

Upon receipt of the equipment be sure to compare the model number found on the shipping label with the accessory identification information on the ordering and shipping document to verify that the correct accessory has been shipped.

Inspect the carton housing of each economizer as it is received, and before signing the freight bill, verify that all items have been received and that there is no visible damage. Note any shortages or damage on all copies of the freight bill. The receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent. Concealed damage not discovered until after loading must be reported to the carrier within 15 days of its receipt.

DESCRIPTION

The EIFM-2 and EIFM-3 economizers are designed to be used with Bard 1-1/2 thru 3 ton wall mount series air conditioners and heat pumps with low ambient fan cycling controls. They are electromechanical economizer systems designed to provide “free” cooling where the outdoor air temperature is cool enough to provide the needed cooling without running the compressor. When cooling is needed, the system automatically takes advantage of the could outdoor air when available and uses it for first stage cooling. This then reduces the need to runt the air conditioning compressor providing lower operating costs and increasing the service life of the equipment. If the outdoor air gets too warm or humid to be helpful, the enthalpy control detects the condition and automatically closes the outdoor air and exhaust damper, opens the return air damper and switches to the compressor operation. This is all done automatically to achieve maximum savings without attention for the user. See Figure 1, Page 9, for a block diagram of the economizer operation logic flow. The unit is equipped with a full modulating type damper motor which controls the damper position to a factory set minimum supply air temperature.

	TABLE 1

(1)	FOR USE WITH
MODEL	FOLLOWING UNITS
EIFM-2B	WA/WL181, WA/WL241,WA251, WH183, WH241

EIFM-3B	WA/WL301, WA/WL361, WH301, WH361, WA371

(1)Low ambient is required with Economizer for low pressure compressor operation.

EIFM models not suitable for use with hot gas bypass models.

Manual 2100-390 Page 1

EIFM-3B, EIFM-2B specifications

The Bard EIFM-2B and EIFM-3B are two advanced heating and cooling systems designed for commercial and light industrial applications. Known for their energy efficiency and robust performance, these models are ideal for environments requiring reliable temperature control.

The EIFM-2B is a 2-ton unit, while the EIFM-3B is a 3-ton model, making them suitable for a variety of spaces. Both systems feature a compact design, allowing for easy installation even in restricted areas. The units utilize eco-friendly refrigerants, aligning with modern standards for environmental sustainability.

One of the standout technologies integrated into both units is Bard's innovative heat pump system. This technology allows for effective heating and cooling functionality, reducing the need for separate systems and lowering overall energy expenditure. With a SEER (Seasonal Energy Efficiency Ratio) rating that exceeds many competitors, these models ensure optimal energy consumption while maintaining comfort.

An important characteristic of the EIFM-2B and EIFM-3B is their advanced control system. The user-friendly interface provides precise temperature settings, programmable schedules, and remote access capabilities. This feature allows users to manage their climate control conveniently from anywhere, optimizing comfort and efficiency.

Durability is another hallmark of these models. Constructed with high-grade materials and components, the units are designed to withstand the rigors of commercial use. The robust casing protects internal components from moisture and debris, thereby extending the lifespan of the equipment. The units are also equipped with a reliable scroll compressor that enhances performance while minimizing noise levels, ensuring quiet operation.

Maintenance is simplified with both models, as they feature easy access panels and self-diagnostic capabilities. This design allows technicians to perform routine checks efficiently, reducing downtime and service costs.

In summary, the Bard EIFM-2B and EIFM-3B heating and cooling systems encapsulate innovation, efficiency, and durability. Their eco-friendly technology and advanced features make them a smart choice for businesses looking to enhance their climate control solutions while minimizing their environmental impact. Whether for a small commercial space or a larger industrial application, these units are engineered to deliver reliable performance and exceptional energy savings.

GENERAL