Viessmann Vitogas 050 ECD Series Installation & Service Manual page 24

Ref
Name of Part
No.
33 Pilot bracket for
Q3451A
34 Manual reset safety
high limit control
35 Adjustable
aquastat
36 Thermometer
37 Pump aquastat
38 Support bracket
upper
lower
39 Insulation steel cover
Left side
Right side
40 Insulation fiber plate
Left side
Right side
41 Hex bushing
1 1
1 ⁄ ˝ x 1 ⁄ ˝
2 4
42 Pressure relief valve
3
⁄ ˝ 30 psig
4
43 Pressure gage
0-100 psig
44 Flame roll-out switch 9543 878 9543 878
60T14 140F (140°F)
45 Transformer
120/24V 40VA
46 Terminal strip
47 Blocked vent switch
60T15 235F (235°F)
48 3-pole 41 plug
Female
Male
Replacement parts are available from your Viessmann dealer. Installation of incorrect replacement parts can cause unsafe
operation.
24
Part No. ECD
Silver Orange -65
9543 384 9543 384 1
9509 899 9509 899 1
9543 875 9543 875
1
9506 884 9506 884 1
9519 214 9519 214
1
9543 731 9543 731 2
9543 732 9543 732
2
5130 822 5130 822
1
5130 825 5130 825 1
7205 515 7205 515 1
7205 514 7205 514
1
9543 718 9543 718
2
9542 940 9542 940 1
9542 939 9542 939 1
1
9543 945 9543 945
1
9543 458 9543 458 1
9543 729 9543 729
1
7037 464 7037 464
1
7270 385 7270 385 1
ECD ECD ECD
-80 -100 -115
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
2 2 2
2 2 2
1 1 1
1 1 1
1 1 1
1 1 1
2 2 2
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
ECD ECD ECD
-140 -155 -180
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
2 2 2
2 2 2
1 1 1
1 1 1
1 1 1
1 1 1
2 2 2
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
ECD
-200
1
1
1
1
1
2
2
1
1
1
1
2
1
1
1
1
1
1
1
1