•
Close
down
the
cold
water
valve
sans
3,
if
a
valve
is
installed
on
the
hot
water
circuit,
open
it.
•
If
there
is
a
control
valve
4
at
the
hot
water
outlet,
please
open
it.
•
Turn
the
drain
valve
5
and
take
off,
replace
it
after
the
residual
water
is
completely
discharged.
Fig.14