ProFlow PF-OXY1 Installation & Operating Instructions Manual page 6

water heaters can sometimes transmit heat back down the cold pipe into the
appliance; always install a check valve at the outlet of the appliance.
ELECTRICAL CONNECTION:

 this appliance only works on 24 VAC; always use it in combination with the
supplied transformer.
 in case of damage to the power supply cable of the transformer, immediately
disconnect the transformer from the power outlet and replace the transformer.
 make sure to plug the transformer into a power outlet, which is
installed in a dry location, with the proper rating and over-
current protection.
EN - English
OPERATING CONDITIONS & REQUIREMENTS
Page 6