(a) In application and interpretation of this chapter, the classifications of refrigerants and the definitions included in ANSI B9.1 shall apply.
(b) The following additional definitions shall also apply:
(1) “Alteration of a refrigerating system” means any change involving an extension or addition to the system; a change in refrigeration from a refrigerant of one (1) group classification to a refrigerant of another group classification; an increase in the quantity of refrigerant contained in the system; a change in the arrangement, type, or purpose of the original installation; a change in the size of the equipment utilized; relocation of a compressor, generator, condenser, condensing unit, or evaporator; or replacement of any equipment, part, or installation which is not in conformity with the provisions of OBBC and this Building Code;
(2) “Repair of a refrigerating system” means a replacement or renewal of any part of an existing system, including replacement of an existing compressor, condenser, generator, evaporator, or condensing unit, with material or part of like type, make, and capacity, for the purpose of its maintenance; provided that when such replacement or renewal is of a part not in conformity with the provisions of OBBC and this Building Code, such replacement or renewal shall be deemed to be an “alteration.”