Marquis 720 FLY, Owner'S Manual

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Pressure Relief Valve
By Pass Valve
Shut Off Valves
Drain
11 Gallon Tank - Shown (20
gallon similar)
PRESSURIZING AND PRIMING THE WATER SYSTEM
PRESSURIZE AND PRIME THE WATER SYSTEM ONLY AFTER THE FRESH WATER TANK IS FULL.
PRESSURIzING AND PRIMING THE WATER SYSTEM:
Provide power to the circuit breakers on the DC Bus Distribution Panel, located in 1 .
the Engine Room Aft Bulkhead .
Switch ON the
2 . FORWARD SUMP PUMP, MID SUMP PUMP, and AFT SUMP
PUMP circuit breakers, located on the DC Bus (Engine room, aft bulkhead) .
Close the water heater bypass valves, located near the heaters, to allow the fresh 3 .
water to flow into the heaters .
Open the hot and cold shut-off valves on the hot water tank and close the bypass
4 .
valve .
Partially open all cold water faucets, including: transom hand shower faucets and
5 .
bow and transom fresh water washdown faucets .
Supply AC power to the yacht . Refer to Section 3:
6 . Shore Power or Generator
Power for instructions .
Locate the AC Bus 1 Distribution Panel, located in the Engine Room Aft Bulkhead . 7 .
Switch the AC Main Breaker AC Bus 1 circuit breaker ON . a .
Switch the A/C Main Breaker Salon Panel circuit breaker ON . b .
Locate the AC Distribution Panel (Salon): 8 .
Switch the AC Main Breaker ON . a .
Switch the Pressure Water Pump circuit breaker ON, located on the AC b .
Distribution Panel, in the Salon Aft cabinet . Turning the Pressure Water
Pump breaker ON, activates the pressure water pump and pressurizes the
water system . The fresh water system is primed when all of the air is purged
from the system’s pipes and hoses .
Monitor each sink tap and shower head starting from the yacht’s aft . 9 .
Close the cold water faucet for the tap or shower head when a steady stream of 10 .
water flows from the tap or shower head
Open the hot water faucet (the washdowns supply only cold water) .
11 .
Again, close the hot water faucet for the tap or shower head when a steady stream 12 .
of water flows from the tap or shower head .
The water system is primed when all systems are complete . •
Add water to the fresh water tank to replace the water used in previous steps . 13 .
The pressure water pump automatically shuts off when water pressure within the
system increases to the manufacturers specifications . Priming the system also fills
and maintains the water level within the water heater .
USING THE WATER SYSTEM
The freshwater system is designed to operate the same as an in-home water system . Open a faucet to receive fresh water after
filling, pressurizing, and priming the fresh water system . The pressure in the system decreases as water draws from the system . The
pressure water pump automatically turns on and increases the pressure when pressure decreases . The automated system ensures a
steady flow of water any time a faucet is opened .
Occasionally, re-priming may be necessary for a recently filled system or a system that has not been used for a while . Re-priming is
normal, and is caused by an accumulation of air bubbles at the pressure water pump . To re-prime the fresh water system, repeat the
steps under:
Pressurizing and Priming the Water System .
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