AS NZS 60335.2.51:2020 – Household and similar electrical appliances—Safety Part 2.51: Particular requirements forstationary circulation pumps for heating and service water installations.
This clause of Pail 1 is replaced by the following.
This International Standard deals with the safety of electric stationary circulation pumps for household and similar purposes intended for use in heating systems or in service water systems, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances.
NOTE 101 Th, hydraulic and .4.clncal paris of lii. pump can b. in lb. sam. .nclosui., so that h. wal•r flows through the motor and serves as a coolant, or they can be sepalated.
Appliances not intended for normal household use, but that nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops. In light industry and on larms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home, However, in general, it does not take into account
— persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
— children playing with the appliance,
NOTE 102 Attention is drawn to the tact that
— for appliances Intended to be used in velliclea o on board ships or aircraft, additional requirements can be necessary:
— in many COUnIrICS addilional requir.menls are specified by the national health authorities, the national authorities responsible for the protection of labour and similar authorities.
NOTE 103 The. standard does not apply 10
— pumps br circulating liquids other than water;
— pumps. oilier than circulation pumps (IEC 60335-2-4’):
— circulation pumps intended exclusively for industrial purposes:
— circulation pumps intended to be us.d in locations where special condilions prevail, such as the presence of a coirosive or explosive atmosphere dust, vapour, or gas)
2 Normative references
This clause of Part 1 is applicable.
3 Terms and definitions
This clause of Part I is applicable except as follows.
3.1 Definitions relating to physical characteristics
normal operation
operation of the circulation pump with the water pressure and flow rate adjusted within their specified limits, so that the highest power input is attained
4 General requirement
This clause of Part 1 is applicable,
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.7 Addition:
The waler temperature at the inlet is maintained between 0 C and —5 °C of the value corresponding to the YF class of the pump.
For circulation pumps intended to be located within the enclosure of a boiler, the tests of Clauses 10, 11 and 13 are carried out at an ambient temperature of 55 ‘C or at the temperature specified in the instructions, whichever is higher.
5.101 CIrculation pumps having a three-phase motor that does not incorporate a protective device are installed with an appropriate device, in accordance with the instructions.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Circulation pumps shall be class I. class II or class Ill.
6.2 Addition:
Circulation pumps shall be at least IPX2.
6.101 Circulation pumps shall be of one of Ihe classes shown in Table 101.