mjm yachts 50z Downeast, Руководство пользователя

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7.0
7.1
7.2
FRESHWATER SYSTEM
GENERAL
The 50z incorporates a pressurized freshwater system from either of two
Sources: (1) Tankage: 170-gallons total, of which the primary
amount is stored in a 150-gallon tank under the Great Cabin sole with
access under the companionway. A Jabsco pump maintains a constant
pressure in the system. OR (2) a
dock hose inlet located to port in the
cockpit as shown at right. When connected, dock water and city
pressure is used directly by all outlets in the boat...by-passing the
freshwater pump and water tank. A check valve keeps the dock water
supply from backing up into the boat’s water tank and overflowing it.
When using the dock water supply, be sure to turn OFF the “fresh water pump”
breaker on the 12V DC Panel, otherwise the ship’s water pump may win the battle of water
pressure and empty your water tank into the city system.
When leaving the boat with the dock water supply hooked up, be sure to turn
OFF the dock water faucet. If there’s a failure of a fresh water fitting or the pressure regulator, the
boat could flood with water... as there is no limit to the amount of water from the city
source as there is with the boats own water tank.
FILLING WATER TANK
A deck fill is provided on the starboard side deck near the helm station and is labeled WATER. As
the tank is filled, air escapes thru the vent. This tank cannot be filled using the dock hose inlet.
JOHNSON AQUA JET WPS 10.4 DUO 12V FRESH WATER PUMP
This pump is located in the port pilothouse settee
locker. The breaker is located on the 12v DC Panel.
When a faucet is turned on or a device such as the
head or wipers activated, the pumps run, pressure
builds until 0 bar/ 9 psi. At this point, the integrated
pressure automatically switch off the first pump. At
.8 bar/4 psi the second pump is shut off in the same
way. The pumps are equipped with positively
checking outlet valves, which ensure that the
pressure is maintained after the pumps shut
off. When water is demanded (at the faucet, shower
etc.) the pressure decreases. After a moderate drop
in pressure, the inte-grated pressure switches
automatically turns the pumps back on.
If the pump s heard running continually, check that
no faucet has been left open. The transom shower is
a frequent culprit. If this is not the case, turn off the
pump and check the tank is not emptied.
The pump is protected from sediment by an in-line
strainer mounted adjacent to the pump. The
strainer should be checked periodically and cleaned
if necessary.
7.
CHAPTER 7 CHAPTER 7