CSA B140.12:22

1 Scope 1.1 Intent This Standard applies to complete flue-connected, oil-fired service water heaters that are provided with automatic control devices. These service water heaters may be used both for heating and for supplying of domestic hot water. They are not intended to be used as sole-source heating appliances. 1.2 Application The requirements in this Standard apply to a) service water heaters to be operated at pressures not exceeding 1035 kPa (150 psi) and water temperatures not exceeding 99 °C (210 °F); and b) the oil-burning equipment, and appurtenances thereto, included in the assembly of the water heater. 1.3 Heaters for swimming pool water Requirements for heaters for heating swimming pool water are included in Clause 11. 1.4 Terminology In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. 1.5 Units of measurement The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.