Tiara Yachts C49, Owner'S Manual, Page: 108 / 152

Section 12 Seasonal Maintenance
12-2
43 LS
4. Pour five (5) gallons of potable water
antifreeze into the water tank via the
WATER fill fitting(s) on the gunwale(s).
5. Turn both water heater valves (if in-
stalled) fully counter-clockwise to the
bypass position.
6. Switch ON the FRESH WATER break -
er(s) on the DC distribution panel.
7. Open all faucets in the system (hot and
cold), one at a time, until the antifreeze
begins to come out, and then close.
8. Switch OFF the FRESH WATER break -
er(s).
An alternate method is to use commercially
available nontoxic, fresh water system anti-
freeze. After draining the potable water tank,
lines and water heater (if installed), pour the
antifreeze mixture into the fresh water tank,
then prime and operate the pump until the
mixture flows from all fresh water faucets.
Be sure to open ALL faucets, including the
water supply valve for the head. Make sure
antifreeze has flowed through all of the fresh
water drains. Allow the antifreeze to fill the
sink traps.
The shower/cabin drain sump system must
be winterized also. Clean debris from the
drain and sump and flush for several minutes
with fresh clean water. After the system is
clean, pump the drain sump as dry as pos-
sible. Then pour a potable water antifreeze
mixture into the shower drain until antifreeze
has been pumped through the entire system
and out of the thru-hull.
For additional information, refer to section 5,
Plumbing Systems.
Raw Water System
Drain the raw water systems completely. Dis -
connect all hoses and blow the water from
the system. Use only very low air pressure
when blowing water from the system to pre-
vent damage to components. The check
valve mechanism built into the raw water
washdown pump will not remove the water
from the pump. Remove the outlet hose on
the pump, turn it on, and allow it to pump out
any remaining water (approximately a cup-
ful).
An alternate method is to use commercially
available nontoxic, potable water system anti-
freeze. If antifreeze is used, pour the mixture
into a pail and put the raw water intake lines
into the solution. Turn on the raw water wash-
down pump using the
WASHDOWN PUMP
breaker on the DC distribution panel, located
in the starboard cabin upper electrical cabi-
net
. Run the pump until the antifreeze solution
is visible at all raw water faucets, discharge
fittings, and drains. Make sure antifreeze has
flowed through all of the raw water drains.
Generator Raw Water Systems
If a generator is installed on your Tiara Yacht,
drain the sea strainer, heat exchangers,
and raw water supply and discharge lines
for the generator raw water supply pumps.
Make sure all sea water has drained from the
exhaust system. Some generator engine muf-
flers have a drain plug that must be removed
to properly drain the muffler.
Once the exhaust system has been drained,
pour a nontoxic marine engine antifreeze
mixture into a large pail and put the gener-
ator raw water intake lines into the solution.
Run the generator until the antifreeze solution
is visible at the exhaust port, then shut the
engine off.
Winterize the generator engine and fuel sys-
tem by following the generator manufacturer’s
winterizing procedures. Refer to generator’s
owner’s manuals or contact a Tiara dealer.
Fuel System
Leave the fuel tank nearly full to reduce con-
densation that can accumulate in the tank.
Allow enough room for fuel to expand without
leaking from the vents.
Algae can grow in the accumulated water in
diesel fuel tanks, especially in warm climates.
Adding a high quality diesel fuel additive con -