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