60335-2-40(ed.2) & 60335-2-40(ed.3) & 60335-2-40(ed.4) y% H% K, P: h
/ i1 U l6 }% p8 u9 BStandard: IEC 60335-2-40* S: p' Y* D0 \. W: V
Sub clause: 4.11 4 K- Y7 d% d6 ^- R5 t- `Sheet n. 374 Page 1 (1); {/ w3 q/ _% F/ B I7 v
Subject: Normal load conditions A: N- L) W8 c3 v, H+ f$ |Key words: - Worst condition - Manufacturer data " | y% I8 W0 C3 z+ wDecision confirmed at CTL 38th meeting/ l+ a) ^' E: I4 i0 w$ M
Question: ; D; y! \7 j9 F4 q; J) x yAir conditioners are required to be tested at the worst conditions within the range advised by the manufacturer.6 `: \6 o( B' U& J2 f- ^0 l$ l
Some laboratories are carrying out extensive testing (up to 50 load tests) to determine the worst condition. }6 E. } P/ p% ^) h) l1 c6 l
within the specified environmental range.7 F( ^* v6 S1 g+ M
Is this degree of testing required? Can the manufacturer advise of the conditions that are most likely to produce1 _! Y0 Z/ o3 D, @) J8 {: X R
worst conditions (highest compressor current) and the laboratory carry out verification tests over a small 7 J7 E$ `: X- x. u9 @# oenvironment range? 0 _2 _1 f! B% d _) q! x" o, [+ XDecision: 6 e( o+ W: D" }Manufacturer’s data and advice may be used to ascertain the worst case for loading within the specified * \% m5 v. T, Z, L2 B6 [environmental range. Laboratories must confirm the operating conditions but do not need to conduct extensive' w# C5 m/ {# b1 M) U
surveys over the whole operating range. $ F; H9 f& q+ _8 |) w 9 W9 u; J" W* o9 j/ E[attach]75939[/attach]: B8 _& p7 D( Q, S0 n) j* i
DSH 374