Chaparral 420 PREMIERE, Owner'S/Operator'S Manual

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AIR CONDITIONING AND HEATING
The 420 Premiere is equipped with a self-contained
air conditioning system that contains the compres-
sor, condenser, evaporator, refrigerant, tubing, elec-
trical box, blower, condensate drip pan and other
components on a single chassis. Cabin air is pulled
into the unit through a return-air grill, and discharge
air is carried through flexible or built-in ducts to a
grill, which is normally located on a bulkhead high in
the compartment. In a self-contained unit, the refrig-
erant loop is pre-charged and sealed at the factory,
and no additional charging is needed at installation.
The 420 Premiere’s air conditioning/heating system
consists of two (2) standard air conditioning/heating
units, one (1) raw water pump with a seacock and
strainer and a relay unit so the water pump will be
activated by demand when any A/C unit comes on.
An optional cockpit a/c unit is also available.
The master stateroom unit (7,000 BTU) is located
under the master stateroom bunk. The controls for
the unit are located in the port cabinet. The remov-
able air filter is located on the face of the unit. The
master stateroom unit also supplies heating and
cooling to the master head.
The salon unit (16,000 BTU) is located aft under the
starboard salon sofa. This unit supplies heating and
cooling to the salon and aft stateroom. The controls for
the unit are located above the main distribution panel.
The cockpit unit (optional) (16,000 BTU) is located
in the cabinet behind the helm seating. The control
panel is located behind an access door outboard of
the control station. The removable air filter is locat-
ed on the face of the unit.
The raw water pump located in the engine room
cools the air conditioning/heating system to main-
tain optimal operating temperature. The pump
draws water through a seacock and filters it through
a sea water strainer. The water passes through
each compressor cooling the condensing coils, and
then flows overboard through the common drain.
8-2
CAUTION: To reduce the risk of carbon monox-
ide poisoning, test the monitor operation when
not in use for 10 days or more.
MASTER
STATEROOM
AFT
STATEROOM
GALLEY
Figure 8.2 Carbon Monoxide Monitor Locations
MASTER STATEROOM
A/C UNIT, 6,000 BTU
(Below Bunk)
SALON/AFT STATEROOM
A/C UNIT, 16,000 BTU
(Under Sofa)
COCKPIT
A/C UNIT, 16,000 BTU
(Under Helm Seating)
Figure 8.3 Air Conditioner Locations