Vaillant ecoTEC plus 612 Instructions For Installation And Servicing page 114

FITTING AIR/FLUE DUCT EXTENSIONS
How to install 87° elbows
Accy. No.: 303 210
Example:
An offset of 400 mm is measured.
This value is then used, along with the
table below, to determine the length
of the air conduit (= 190 mm in this
case).
Important:
This gives a corresponding
exhaust-conduit length of
190 + 40 = 230 mm.
Table 6.1: Length of surplus with 90° elbows
Offset
[in mm] air conduit
200, 205
210,
> 210 to
< 310 mm
310
315
320
325
330
335
340
345
350
355
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
445
450
455
460
465
470
475
480
485
490
495
500
58
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Fig. 6.3: Installation of 90° elbows
Length of Offset
[in mm]
[in mm]
0 505
0 510
515
not 520
possible
525
530
100 535
105 540
110 545
115 550
120 555
125 560
130 565
135 570
140 575
145 580
150 585
155 590
160 595
165 600
170 605
175 610
180 615
185 620
190 625
195 630
200 635
205 640
210 645
215 650
220 655
225 660
230 665
235 670
240 675
245 680
250 685
255 690
260 695
265 700
270 705
275 710
280 715
285 720
290 725
Length of Offset
air conduit [in mm]
[in mm]
295 730
300 735
305 740
310 745
315 750
320 755
325 760
330 765
335 770
340 775
345 780
350 785
355 790
360 795
365 800
370 805
375 810
380 815
385 820
390 825
395 830
400 835
405 840
410 845
415 850
420 855
425 860
430 865
435 870
440 875
445 880
450 885
455 890
460 895
465 900
470 905
475 910
480 915
485 920
490 925
495 930
500 935
505 940
510
515
Length of
air conduit
[in mm]
520
525
530
535
540
545
550
555
560
565
570
575
580
585
590
595
600
605
610
615
620
625
630
635
640
645
650
655
660
665
670
675
680
685
690
695
700
705
710
715
720
725
730