DSH 109/06 Endurance and thermal tests on apliances for purifying water usig an

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DSH 109/06 ! {/ k  e% q1 b! a& U

Endurance and thermal tests on apliances for purifying water usig an UV lamp / b% K' l/ T7 f, h) h+ t

11-19 / 12 6 q* B* Q0 [6 l. S

60335-1(ed.3) & 60335-1(ed.4) & 60598-1(ed.5) & EN 60335-1:1994 & EN 60335-1:2002 & EN 60598-1:2000 ; u, C! z3 f- S! s+ |

# c- q4 ~$ Y. W+ m! |Question:
9 P" h& M- L  J/ d8 oThe appliance for purifying water is equipped with an UV lamp (with its accessories). The unit can be used with or without a constant water flowing (in accordance with the manual instructions). What should be the temperature of the water during the thermal tests?
. E0 [5 W) ~( ?# w$ u. fDecision:
The applicable standard is IEC/EN 60335-1. The thermal tests have to be carried out according to clause 11 (heating) and clause 19 (abnormal conditions) of IEC/EN 60335-1. If according to the manual instructions the appliance can be used without water flowing, we have to consider this situation as worst case: all tests have to be performed without water flowing. At the
! S/ r9 R! _$ b1 obeginning of the tests, the water shall be at room temperature (25°C). If the appliance is provided for use with water flowing only, the heating test (clause 11) shall be started with water at room temperature (25°C) but flowing. For the abnormal conditions test (clause 19), the water flowing has to be stopped unless there is a monitoring circuit to switch off the appliance in case of water
flow interruption. At the beginning of the test the water shall be at room temperature (25°C).
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