EN 12309-1-2014 pdf download.Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW – Part 1: Terms and definitions.
— fiat joints.
3.1.27
monovalent appliance
encased assembly or assemblies whose primary and secondary functions are dependent on circulation of fluid (refrigerant and/or solution) within the absorption, adsorption or refrigerant circuit(s)
3.1.28
outdoor heat exchanger
heat exchanger which is designed to remove heat from the outdoor ambient environment, or any other available heat source, or to transfer heat to it
Note 1 to entry: In the case of heat pumps operating in cooling mode, this is the condenser. In the case of heat pumps operating in heating mode, this is the evaporator
3.1.29
open system
system in which the fluid within the refrigerant circuit (e.g. water, etc.) providing heating or cooling comes into direct contact with the heat transfer medium (e.g. water, air, etc.) which is to be heated or cooled
3.1.30
packaged unit
factory assembly of components of heat pump, chiller or chiller/heater fixed on a common mounting to form a discrete unit
3.1.31
primary function
main purpose for which the sorption appliance is designed
Note 1 to entry: In the case of chiller, the main purpose is the cooling function: In the case of a heat pump this is the heating function.
Note 2 to entry: Both the heating and cooling functions of the sorption appliance may be classed as primary functions if they satisfy the rational use of energy requirements for those functions.
3.1.32
putting an adjuster or a control out of service
procedure by which a control (temperature, pressure, etc.) is put out of action and sealed in this position
3.1.33
restnctor
part with an orifice, which is placed in the gas circuit so as to create a pressure drop and thus reduce the gas pressure at the burner to a predetermined value for a given supply pressure and rate
3.1.34
sealing an adjuster
procedure by which an adjuster is set so that changing the setting of the adjuster breaks the sealing material and makes the interference with the adjuster apparent
Note 1 to entry: A factory sealed adjuster is considered to be non-existent,
Note 2 to entiy A regulator is considered to be non-existent Wit has been factory sealed In the fully opened position.
3.1.35
secondary function
optional function of the sorption appliance, such as heating or cooling, which is not expected to satisfy the rational use of energy requirements of a primary function
3.1.36
setting an adjuster
procedure by which an adjuster Is immobilized in a position by some means (e.g. screw)
3.1.37
sorption
process that is absorption or adsorption
3.1.38
sorption appliance
generic word used to describe all the appliances covered by this standard
Note 1 to entry: The medium used for distribution of heating and/or cooling is liquid.
3.2 Combustion products circuit
3.2.1
combustion chamber
enclosure inside which combustion of the air/gas mixture takes place
3.2.2
draught diverter
device placed in the combustion products circuit to reduce the influence of flue pull and prevent down draught affecting on the burner performance and combustion
3.2.3
flue outlet
part of the appliance that connects with a flue to evacuate the products of combustion
3.2.4
flue terminal
device fitted at the end of the duct system that enables the discharge of flue gases and may. at the same time. allow entry of combustion air
3.3 Adjusting, control and safety devices
3.3.1
adjustable pressure regulator
regulator provided with means for changing the outlet pressure setting
3.3.2
automatic burner control system
system comprising at least a programming unit and all the elements of a flame detector device
3.3.3
automatic shut-off valve
device that automatically opens, closes or vanes the gas rate on a signal from the control circuit and/or the safety circuit
3.3.4
control thermostat
device controlling the operation of the appliance by on/off. high/low or modulating control and enabling the temperature to be kept automatically, within a given tolerance, at a predetermined value
3.3.5
fan delay control
control that starts and/or stops the air delivery fan when the temperature of the delivered air reaches a certain predetermined value.EN 12309-1-2014 pdf download.

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