Biasi RIVA COMBI Service Manual page 21

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Third Part (edition-0106)
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6 Emtying the D.h.w. Circuit
1) Turn off the domestic cold water inlet cock
and turn on the hot water taps and any drain
cock.
2) Turn on the storage tank drain cock L in
Figure 9 and empty the d.h.w. tank.
RIVA COMBI SERVICE MANUAL – REV A
General Access and Emptying Hydraulic Circuits
L
Figure 9
1-3