Manual 2100-034G
Page 11 of 21
Unit Installation – Electrical
All Products – Power Supply Verification
It is very important to follow all electrical and mechanical safety guidelines and instructions provided in the product
installation instructions. Failure to do so may result in death, injury or product damage.
A proper power supply to your new Bard unit is very important. Be sure to verify the following with a multi-meter or
other power measuring device before applying power to your Bard product.
Field-Supplied Voltage
Electrical voltage ratings and proper voltage operating ranges are provided in the unit specication sheets and
installation instructions. It is important that power supplied to the unit stay in the specied operating voltage range.
Voltage above or below the minimum operating value given could result in improper unit startup, unit shutdown,
low unit performance, improper thermostat and unit controller operation, compressor damage and premature failure
of functional parts. As a general guideline, it is always best if the power source for the unit supplies the nominal
electrical rating value given in the specication sheets, installation instructions and unit serial plate for the product
being used. To do so will provide the best unit performance possible from your new Bard product.
Single and Three Phase Power
Bard products are available in single and three phase power options. It is important to connect the proper phase
listed on the unit serial plate. Three phase power is often used to reduce energy usage, and units rated for 3 phase
operation are equipped with a phase monitor safety device. The phase monitor will not allow unit operation with
improper phase connection and a red LED light on the monitor indicates phase wiring issues. Connecting 3 phase
power to a single phase unit will result in component damage and improper unit operation. Connecting single phase
power to a 3 phase unit will also result in component damage and improper unit operation.
Hertz (Frequency)
Bard products are available in 50hz and 60hz power options. It is important to connect power with the proper hz
value listed on the unit serial plate. 60hz power is often used in the United States and Canada and units rated
for 50hz operation are normally for international sales outside of this area. Connecting 50hz power to a 60hz unit
not rated for 50hz operation may result in component damage and improper unit operation. Some equipment may
be rated for 50/60hz operation. Review the unit specications and installation instructions for further information
regarding the power requirements of the unit.
The product installation instructions and unit specication sheets contain additional information regarding unit
electrical data. This information may be accessed at www.bardhvac.com.
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