Mitsubishi Electric QAHV Série Manuel D'installation & D'instructions page 14

* 3-way valve installation
Please connect 3-way valve on the lower part of the storage tank except when the unit is in operation. Anti-
freezing operation will keep the water in the tank circulated and water storage tanks can become thermally
stratified.
Anti-freezing operation
Residual running of the pump
Hot water storage operation
* The ON/OFF control of 3-way valve
depends on the output type "(r) EXTERNAL
DEVICE CONNECTING TERMINAL" on
page 59.
GB-14