172-65702M-04 (SQ-C01) 10 Dec 2020
27
Prevention of Damage due to Freezing
Use only under conditions in which no freeze-up will occur. Freezing
may damage the unit, leading to fluid discharge, which may different
cause burns or other injury.
CAUTION
When draining water from the unit, make sure to wait until the unit has
cooled down. If carrying out work after hot water use, there is a risk of
burns, as the components and the water inside the unit are hot.
CAUTION
Make sure measures are taken to prevent freezing of the unit’s steam piping system
in cold climates. If the unit is damaged due to freezing, repair will be billed even
during the warranty period. Water in the water supply system cannot be discharged
with the unit. To prevent freezing of the water supply system, contact the
administrator of the water system.
Draining procedure
1) Make sure the valve at the cold water inlet is closed and has cooled down.
2) Loosen the cover fixing screws and remove the cover.
3) Loosen the plug on the right end of the bottom pipe of the heat exchanger. (Be
careful as water flows out when plug is loosened.)
4) Loosen the cap nut that are holding the flexible tube and the heat insulation
fittings to drain water accumulated in the tube. (Be careful not to lose the gasket
when the nut is removed.)
5) After water is drained, reattach the plug, flexible tube and the cover.
