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

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DSH 109/06 " {- [7 \9 Q4 Q3 j! R3 d

Endurance and thermal tests on apliances for purifying water usig an UV lamp

11-19 / 12 + C/ x2 J( _9 U# T

60335-1(ed.3) & 60335-1(ed.4) & 60598-1(ed.5) & EN 60335-1:1994 & EN 60335-1:2002 & EN 60598-1:2000 3 r7 L# p1 n; r) W4 S) M

Standard: IEC 60335-1/1991
3 s( D' v% d( n. S1 U. UIEC 60335-1/2001
% D( Q8 M& O. L2 o5 K0 ~EN 60335-1/1994
. Q- p4 ?( [2 WEN 60335-1/2002
% V9 v  F- ?, ~8 m7 {IEC 60598-1/1999
EN 60598-1/2000
) k9 j/ t9 M0 A" q9 q( q/ Y5 q, pSub clause: 11 - 19 12
Sheet N°: 109/06
; I- l' n5 R8 ySubject: Endurance and thermal tests on appliances for purifying water using an UV lamp
3 h/ z0 o# n1 G# h* B3 tKey words:
- Thermal tests
- Abnormal conditions
- Temperature of water flowing
1 O/ S+ @' E! g4 f% ZMeeting: Decision confirmed at CTL 41st meeting
Question: The appliance for purifying water is equipped with an UV lamp (with its
( C+ L$ [' u' Kaccessories). 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?
% y9 V* o& a" F1 n7 Q# uDecision: The applicable standard is IEC/EN 60335-1. The thermal tests have to be
7 v9 o) Q& }' E% |) Fcarried 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
# i" @- Y# R5 u- h. Aas worst case: all tests have to be performed without water flowing. At the
beginning of the tests, the water shall be at room temperature (25°C). If the
( l$ h  S' ]! U" j7 W3 T' Nappliance 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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