Double Vacuum Valve DW DW is located on heater unit

INSPECTION OF DW

CHECK VACUUM CIRCUIT CONTINUITY BY BLOWING AIR

All circuit should be closed.

(b) Apply 12 volts to the positive (+) terminal and ground terminal T,.

There should be continuity between B and C at this time.

(c) Apply 12 volts to the positive (+) terminal and ground terminal T,. There should be continuity between A and B at this time.

If a problem is found, replace the DW.

WATER TBi

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