4.5 Integrated Proven Draft Switch with external Proven Draft Switch backup
Fig. 12 shows how to connect a external Proven Draft Switch (PDS) to the MEC24.
The external PDS is a backup to the integrated PDS and both must be satised by sucient draft to release the appliance:
y Remove the factory installed jumper over terminals 30 and 32.
y Connect the switch to terminals 30, 31 and 32 as shown on g. 12.
MEC24 Control board
1 x 120V AC
Fig. 12
13
3120066 MEC24 US 20210325
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