Hitachi YUTAKI Series Instruction And Operation Manual page 192

MAINTENANCE
Draining operation for YUTAKI M
YUTAKI M has no drain port factory supplied. It is highly recommended to install a drain port valve attached to the water outlet of the
YUTAKI M unit in order to ease the operation of draining. When the drain port is installed the draining procedure for the YUTAKI M
follows the next steps:
1 Switch OFF the main power of the unit.
2 Close the shut-off valve installed at the water inlet connection (field supplied).
3 Connect a pipe or a drain hose to the drain port (field supplied) placed in the water outlet pipe of the unit.
4 Open manually the drain port of the shut-off valve (field supplied), and collect the water into a bucket (or to a sewage system)
5 Once all the water has been drained, and all maintenance operations have been finished, close again the drain port and open
again the valve of the water inlet pipe to restart the normal operation of the unit.
180 PMML0335A rev.1 - 04/2016