Tiara Yachts C49, Owner'S Manual

Page: 67 / 152

Ventilation Systems Section 6
6-1
43 LS
43 LS
Ventilation Systems
Ventilation is supplied by opening portlights
or using the air conditioning system.
6.1 Air Conditioning System
The air conditioner can be operated to cool
or heat. The cabin and head air conditioner
is located outboard of the starboard aft cabin
berth, accessible via a panel
. Do not store
items in this compartment. Items stored on or
immediately next to the air conditioning unit
could cause damage to the air conditioner or
be damaged by heat or condensation. The
mid-cockpit air conditioning units are located
in the helm seat base.
To operate the unit(s), first turn ON the AIR
COND and AIR COND PUMP breakers on
the AC distribution panel (installed in the
starboard cabin upper electrical cabinet). The
temperature is controlled using the climate
control panels in the starboard cabinet aft of
the berth.
The cold air return is located in the aft berth
on the starboard forward bulkhead. To obtain
maximum efficiency from the air conditioner,
do not obstruct the air return.
The air conditioner is self-contained and sea
water cooled. The cooling pump supplies sea
water to the unit, which cools the condensing
unit and is discharged overboard. The pump
is located in the mechanical space.
Air conditioning pump, strainer, and valve
Sea water is supplied to the pump from a
thru-hull fitting located in the hull near the
pump. A sea strainer between the pump and
thru-hull fitting protects the system from con
-
taminants that can damage the pump or the
air conditioning system. Periodically clean
the sea strainer basket to make sure the sea
water pump receives adequate water.
Air locks can occur in the cooling pump water
supply at the time of launching. If your boat
has been recently launched and water is not
flowing from the overboard thru-hull when the
AIR COND PUMP breaker on the AC distribu
-
tion panel is ON, air may need to be purged
from the system. This can be achieved by
making sure the valve at the cooling pump
intake thru-hull is open. Then run the boat
at cruise speed for several minutes. A scoop
attached to the intake thru-hull will pressur-
ize the system and force the air through the
pump. Refer to the air conditioner owner’s
manual for additional operating and mainte-
nance information.
NOTICE
!
Air conditioners use surface water to
cool. DO NOT operate the air condi-
tioner out of the water or without the
raw water supply, or else damage to
the system will occur. Confirm a water
supply before operating the air condi-
tioning. The lack of a water supply can
also trip the circuit breaker.
6.2 Portlights
Portlights are secured by adjustable dogs.
The dogs should be adjusted so they are
tight enough to seal the window in the closed
position, but not so tight that they are difficult
to latch. The dogs are adjusted by turning a
screw. The screw increases or decreases the
pressure on each dog.