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|  DSH 374* s: q+ y( i6 ^
6 s9 s n; r$ y0 t | Normal load conditions
' h) n0 [0 v) R% ]" ^ | 4.11+ m. d" F; W# E2 ]. o
| 60335-2-40(ed.2) & 60335-2-40(ed.3) & 60335-2-40(ed.4)9 }3 N9 N- z3 f& n H% d: Q# z1 _
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B4 [! ] \1 H& s
Standard: IEC 60335-2-40
1 V( k0 |, [( X! G& @Sub clause: 4.11
I8 g( A. H1 m3 _Sheet n. 374 Page 1 (1)3 v* r; y! {8 F5 F2 q
Subject: Normal load conditions! N! J* q" k! [% z% N! s0 j: E) J; J
Key words: - Worst condition - Manufacturer data; {. z$ u4 V. d" u1 W
Decision confirmed at CTL 38th meeting) ]4 I6 P" [: S% o
Question:# v8 K' C3 k; ~8 b1 U% k
Air conditioners are required to be tested at the worst conditions within the range advised by the manufacturer.+ i" J$ e! x: x# @$ e
Some laboratories are carrying out extensive testing (up to 50 load tests) to determine the worst condition$ O! b/ ^3 J V& y) V- E- U9 W
within the specified environmental range.
# `& `7 j: A v4 Q1 x4 EIs this degree of testing required? Can the manufacturer advise of the conditions that are most likely to produce" U: ~, y! v$ @8 f' C- i
worst conditions (highest compressor current) and the laboratory carry out verification tests over a small
, w" K) Q; F( o# \3 N+ X8 eenvironment range?; ^* [2 @0 D0 {
Decision:
- c+ J* r5 Z4 ~8 ~) BManufacturer’s data and advice may be used to ascertain the worst case for loading within the specified: I1 m1 h1 @. C# `
environmental range. Laboratories must confirm the operating conditions but do not need to conduct extensive
1 k2 g8 X; g2 O: R8 ^6 |surveys over the whole operating range.4 W: `5 |0 C+ Z# @1 \3 H* b: L3 B
6 w- ^3 O, ^& G8 ^5 D) ?6 w7 R; J1 e c8 c8 C, k6 ^
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