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J - 2
PRESSURIZED WATER SYSTEM
The water pump is an automatic, on-off, self-priming pump
that can service several outlets at once. The pump will
build up water pressure and will turn off when it reaches
35 psi. It will generate 20 psi with the faucets open. Refer
to Figure J2.
Flojet Pump
w/ Connector
Elbow
15MM
Stem Shut-Off Valve
Elbow
1/2" Female
Flojet Fitting
Shurflo Inline
Adapter
Kit
Filter
Figure J2: Fresh Water Pump Location
A. Priming The System
After filling the water tank, open all faucets partially. Then,
activate the FRESH WATER switch on the cabin AC/DC
panel to supply the system with water. Let the pump run
until water comes out of the galley faucet, head faucet
and transom shower.
After all the air has been purged from the system and a
steady flow of water is coming from each outlet, turn off
the faucets one by one. Begin with the cold water fau-
cets and continue until all faucets are shut off. As the
pressure builds, the pump will automatically shut off at
35 psi. Refer to Section H-4 - 12 Volt Electrical Equip-
ment and the manufacturer's literature included in the
owner's packet for additional information.
B. System Operation
When properly primed and activated, the pressurized water
system can be used in the same manner as the water
system in a home. An automatic pressure sensor in the
water pump keeps the system pressurized. Simply turn
on the faucet and water will be delivered. If the system
has been recently filled, or has not been used for an extend-
ed period of time, air bubbles may accumulate at the
pump. If this should happen, re-priming may be neces-
sary.
378 Vista™ Owner's Manual
1/2" BSP
Check
Adapter Elbow
Valve
™
378
To obtain the most consistent mixture of hot and cold
water, turn the cold water on full, then mix in hot water
until the desired temperature is obtained. If water pump
cycling occurs, some minor variations in water tempera-
ture can be expected.
Whenever the boat will be left unattended for an extended
period, the water pump switch should be turned to the
OFF position. This switch should also be turned OFF
whenever the water tank is to remain empty for an extended
period of time.
C. Water Heating Systems
The water heater used on 378 Vista™ has a 20 gallon
capacity. The water heater is installed center-aft, inside
the engine compartment. Refer to the locator drawing at
the back of the manual.
The water heater utilizes 120 volt (220 volt on 50 Hertz
models) power. The water heater breaker switch is lo-
cated on the cabin 120 Volt AC panel.
NOTICE
DO NOT supply 120 volt power to an empty wa-
ter heater. Damage to the heater will result im-
mediately. The water system must be filled and
primed before attempting to use the water heater.
A water heater that incorporates a heat exchanger is stan-
dard on the 378. The heat exchanger allows the engine
coolant to heat a portion of the fresh water supply while
the engines are operating. This feature provides hot wa-
ter at times when 120 volt power is not available. Addi-
tional information on heat exchangers is covered in the
engine and hot water heater manufacturers' manuals.
Please refer to Section H - Electrical Systems for addi-
tional information.
D. Using The Shower
Turn on the faucets to desired temperature, remove the
shower spout from its holder, move the diverter lever on
the shower head, and the shower is operational.
When using the shower, draw the shower door closed
before using the shower. Damage to the finish can result
if surrounding walls and flooring are allowed to become
excessively wet. Thoroughly dry these areas after show-
ering.
Section J
Page 2
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