EN 60335-2-51-1991 pdf download.Safety of household and similar electrical appliances Part 2: Particular requirements for stationary circulation pumps for heating and service water installations.
This EN 60335-2-51 of Part 1 is applicable, except as follows:
1.1 Replacement:
This standard applies to electric stationary circulation pumps intended to be used in heating systems or in service water systems, and having a rated input not exceeding 300 W.
Pumps not intended for normal household use, but which nevertheless may be a source of danger to the public, such as pumps intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard, but only if they have a rated input not exceeding 300 W.
This standard does not take into account the special hazards which exist in nurseries and other places where there are young children or aged or infirm persons without supervision; in such cases, additional requirements may he necessary.
This standard does not apply to:
— pumps within the scope of EN 60335-2-41;
— pumps designed exclusively for industrial purposes;
— pumps intended to be used in locations where special
conditions prevail, such as the presence of a corrosive or
explosive atmosphere (dust, vapour, or gas):
— pumps for circulating liquids other than water.
For pumps intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary.
For pumps intended to be used in tropical countries, special requirements may be necessary.
Attention is drawn to the fact that in many countries additional requirements are specified by the national health authorities and the national authority responsible for the protection of labour.
2 Definitions
This clause of Part 1 is applicable, except as follows:
2.2.30 Replacement:
normal load denotes the load obtained when the pump is operated as in normal use, at rated voltage or at the upper limit of the rated voltage range, with the maximum mechanical load within the limits specified by the manufacturer.
Additional definition:
2.2.101 Punp denotes the combination of the mechanical part, the hydraulic part and the electrical part of the appliance.
The hydraulic part and the electrical part may be contained in the same housing in such a way that the water circulated flows through the motor and serves as a coolant, or the hydraulic part and the electrical part maybe separated, by using either separate housings or a seal between the parts contained in the same housing. in such a way that the water circulated cannot enter the motor. If the hydraulic part and the electrical part are contained in separate housings, these parts may be coupled mechanically or magnetically. In all cases, the motor may or may not be totally enclosed.
3 General requirement
This clause of Part I is applicable.
This clause of Part 1 is applicable, except as follows:
4.2 Addition:
The test of Sub-clause 18.2 may be made on a separate sample.
4.5 Addition:
For pu7nps intended to be located within the enclosure of a boiler, the ambient temperature is maintained between 55 °C and 60 °C, if the test results are influenced by the te,nperature of the ambient air.
The water temperature at the inlet ofthepump is maintained at the value appropriate to the class marked on the pump, within a tolerance of °C
5 Rating
This clause of Part I is applicable, except as follows:
Additional sub-clause:
5.101 The maximum system pressure is not less
than:
0.6 MPa (6 bar) for pumps for heating systems,
— 1.0 MPa (10 bar) for pumps for service water systems.
compliance is checked by inspection of the marking or of the instruction sheet.
6 Classification
This clause of Part 1 is applicable, except as follows:
7 Marking
This clause of Part 1 is applicable, except as follows:
7.1 Addition:
— rated current in amperes, if this is necessary
for the adjustment of a motor-protection
circuit-breaker;
— maximum system pressure in pascals or bars,
unless this is given in the instruction sheet;
— class according to the temperature of the
water;
— maximum ambient temperature, if
exceeding 35 °C, for pumps other than those
intended to be located in the enclosure of a boiler;EN 60335-2-51-1991 pdf download.