Document LTP0101 rev 2.1f

 

Verifying Transformer Setting

Transformer voltage must be confirmed and set correctly depending on the measured voltage found on the site. Incorrect settings may cause heat pump damage. The following procedure will allow the installer to set the heat pump's transformer for the appropriate site voltage.

WARNING

Failure to heed the following may result in injury or death.

 

  • The information contained in this section is intended for use by qualified technicians, familiar with electrical service-industry safety standards and methods.

Example of heat pump transformer

(Varies between models)

  1. Turn heat pump on by adjusting the thermostat to call for heating or cooling. If more than one heat pump is on site, turn them all on. Allow time for all heat pump compressors to activate.
  2. Measure the running site voltage.
  3. Confirm transformer tap is set for the measured site voltage. If more than one voltage tap is shown, select the voltage nearest to the running site voltage.

 

Please note -

  • If more than one voltage is shown on the equipment’s data plate, the factory default setting is usually the higher voltage on the transformer.
  • As an example, a "208/230" voltage will be set to "240" from the factory.