Dometic MasterFlush 8740 User Manual

7
Dometic 8700 Series MasterFlush Toilet Installation
5 Installation
5.1 Fresh water system layout - marine application
5.2 Raw water system layout - marine application (additional components required)
Note
Use cold water only. Include shut-off valve in water line for maintenance purposes.
Notes
Use cold water only. Include shut-off valve in water line for maintenance purposes.
Use primary and secondary raw water lters.
Raw water pump MUST NOT be demand-type. Pump is controlled by control module.
Install vented loop as shown. It must be equipped with integral check valve that permits air into line to
prevent siphoning.
Dometic 8700 series macerator toilets can
operate with an onboard pressurized freshwater
system with a minimum ow rate of 2.5 gpm
(9.5 lpm) at the toilet. Onboard fresh-water
demand systems include a water pump that
automatically draws water from a water
Dometic macerator toilets can ush on seawater but require a separate pump for this purpose. The
pump is activated by the signal from the toilet’s electronic control module that would operate the
integral water valve in a fresh water system. If the raw water pump draws more than 18 amps of
current, a 12 or 24 V DC electrical relay must be installed.
storage tank when a valve anywhere in the
piping system is opened. Dometic toilets are
equipped with an electrically operated water
valve and a backow preventer to prevent
contamination of onboard potable supplies.
6
7
VENT
FITTING
SEACOCK
VENT
FILTER
DISCHARGE
PUMP
DECK
DISCHARGE
“3/4” AND
“FULL” LEVEL
PROBES (opt.)
CONTROL
MODULE
CONTROL
MODULE
MACERATOR
TOILET
MACERATOR
TOILET
FLUSH
SWITCH
FLUSH
SWITCH
0.5 in./13 mm
FRESH WATER
HOSE
0.5 in./13 mm
WATER HOSE
0.625 in./16 mm HOSE
1 in./25 mm HOSE
SEACOCK
TO SUCTION SIDE OF
RAW WATER PUMP
FINE WATER FILTER
(100 MESH)
SMALL ENGINE INTAKE STRAINER (COARSE)
RAW WATER
PUMP
WATER LINE
HOLDING TANK
(cut-away view)
VENTED LOOP/CHECK VALVE
Must be 8 in./203 mm minimum
above water line during all
conditions of heel, trim or load

Dometic MasterFlush 8740 Specifications

General

Brand	Dometic
Model	MasterFlush 8740
Category	Toilets
Language	English