Hitachi RAW-35RHC - Page 92

7 Maintenance notes
Maintenance work
SMGB0135 rev.0 - 06/2020
84

Filling the DWH tank with water
Followthestepsbelowwhenstartinguptheunitforthersttimeorwhenithasnotbeenusedforanextendedperiodoftime.
1 Open the outlet water taps of the DHW, to expel all the air from inside the tank.
2 Turn on all the connected mixer taps (hot water side).
3 OpentheinletvalveoftheDHWtankinordertollthetank.Ifthereisashut-downvalveinstalledintheDHWtank
outlet, open it to allow circulation through the DHW installation.
4 WhenwaterbeginstoowfromtheoutletwatertapsoftheDHWinstallation,closeallthesetaps.
5 Turno󰀨alltheconnectedmixertaps.
6 Inspection
a. Afterllingthetank,checkallpipe,heaterandanodejointsandthetankforleakage.
b. Check operation of the pressure relief valve.
c. Afterheatingwaterforthersttime,checkwaterleakagefromthepipe,heaterandanodejointsandthetank
once more.