General

GENERAL INFORMATION

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

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

The economizer installation will function normally with the 2-stage thermostats already specified for usage with this 2-stage cooling unit.

If the “free cooling” of the economizer cannot keep up with the cooling demand, it will de-energize the economizer and will then operate on 2nd stage mechanical cooling. Because of this, all units equipped with an economizer need to be equipped with the low ambient control. For field installed applications, install Bard Low Ambient Control Kit per Table (below):

W24G1 - W60G1		CMA-6

WG3S	- WG5S	CMA-28

W24G1D	- W60G1D	CMA-28

If using a Bard Master Controller, the Bard MC3000 controller is designed to control two (2) redundant Bard Wall Mount units equipped with economizers. Refer to the MC3000 Installation Manual (or consult Bard Technical Service) for the required connections and sequence of operation.

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 ventilator 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 WGEIFM-3C economizer is designed to be used with Bard W24G to W36G 1-stage cooling, 1-stage heating gas electric model wall mounts that are equipped with fan cycling controls. The WGSEIFM-5 economizer is designed to be used with Bard WG*S 2- stage cooling and W42-60G 1-stage cooling, 1-stage heating gas electric model wall mounts that are equipped with fan cycling controls. They are an electromechanical economizer system 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 cold outdoor air when available, and uses it for first stage cooling. Thus reducing the need to run 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 operates the internal damper and switches on the mechanical cooling. This is all accomplished automatically without attention from the user to achieve maximum savings. See Figure 6 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.

MODELS

When installed in model series (refer to Table 1), all EIFM models provide built in exhaust provisions. When the damper blade opens to bring fresh air in, the damper also opens an exhaust relief. The exhaust air will flow into the condenser section of the unit. The condenser fan will help draw exhaust air out.

TABLE 1

	FOR USE WITH
MODEL	FOLLOWING UNITS

WGSEIFM-5	WG3S
WGSEIFM-5	WG4S
	WG5S

WGEIFM-3C	W24G
WGEIFM-3C	W30G
	W36G

WGEIFM-5C	W42G
WGEIFM-5C	W48G
	W60G

Manual	2100-498B
Page	3 of 17

WGEIFM-5C, WGEIFM-3C, WGSEIFM-5 specifications

Bard WGEIFM-5C, WGSEIFM-5, and WGEIFM-3C are cutting-edge energy-efficient HVAC solutions designed to meet the diverse needs of modern buildings while ensuring superior comfort and performance. These units are engineered to provide effective heating and cooling, utilizing advanced technologies that prioritize environmental sustainability, user-friendliness, and reliability.

The Bard WGEIFM-5C model is particularly known for its compact design, making it suitable for tight spaces. It employs an advanced inverter-driven compressor that optimizes power consumption, resulting in significant energy savings without compromising on performance. This unit also features a programmable thermostat that allows users to tailor their climate control settings, enhancing overall comfort.

The WGSEIFM-5, on the other hand, is designed for semi-indoor applications where space and efficiency are paramount. This model boasts a high Energy Efficiency Ratio (EER), making it one of the most efficient options in its class. The WGSEIFM-5 integrates smart technology that allows for remote monitoring and management, enabling users to adjust settings from their smartphones or computers. This flexibility ensures that energy usage can be managed effectively, further contributing to cost savings.

The WGEIFM-3C, known for its robust construction, is perfect for larger spaces needing consistent climate control. Equipped with a multi-stage cooling system, this unit provides effective and rapid temperature regulation. Its durable chassis is designed to withstand harsh environmental conditions, making it ideal for both residential and light commercial applications. With built-in noise reduction technologies, the WGEIFM-3C operates quietly, ensuring minimal disruption to the surrounding environment.

All three models incorporate eco-friendly refrigerants that comply with environmental regulations, reflecting Bard's commitment to sustainability. They also feature user-friendly interfaces, making them accessible for users of all technical expertise. Easy installation and maintenance routines are hallmarks of Bard's design philosophy, ensuring that users can keep their systems running smoothly.

Overall, Bard WGEIFM-5C, WGSEIFM-5, and WGEIFM-3C stand out in the HVAC market with their innovative features, energy-efficient technologies, and exceptional performance. These models not only enhance indoor comfort but also promote energy savings and environmental responsibility, making them a smart investment for any building.