Dometic SeaLand 8812 - Manual (Page 5)

5
inSTALLATiOn – SySTEM DiAgRAMS
Flush Water OptiOns
FRESH WATER SYSTEM – All SeaLand macera-
tor toilets can operate with an onboard pressur-
ized freshwater system with a minimum flow 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 storage
tank when a valve anywhere in the piping system
is opened. SeaLand toilets are equipped with
an electrically operated water valve that opens
during NORMAL and LOW flushing modes.
SeaLand toilets are equipped with an in-line
check valve or air gap to prevent contamination
of onboard potable supplies. See later sections
for specific information on connecting the water
line to the toilet.
inSTALLATiOn nOTES
• Use cold water only.
• Water supply line: 1/2” (13mm) ID; toilet inlet
fitting is 1/2” (13mm), 14 TPI.
• Requires 2.8 GPM (10.6 LPM) demand water
pump or greater, depending on line restrictions.
• Include shut-off valve in water line for
maintenance purposes.
Please contact your nearest Dometic Sanitation
sales office or distributor for complete details.
wARning!
hAZARD OF FLOODing – if toilet
uses raw water for flushing at ANY time, a
raw water pump controlled by an automati-
cally operating demand switch MuST nOT
be installed. if the onboard water valve or
any plumbing connections were to leak, the
automatically operated pump would start and
could flood the boat. Failure to comply with
this warning can cause loss of property and
life. See other wARningS (p. 3).
RAW WATER SYSTEM – SeaLand macera-
tor toilets can flush 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. Since raw
water pumps operate at a higher amperage than
the freshwater water valve, a 12 or 24 volt DC
electrical relay must be inserted into the electrical
cables connected to the pump. A kit is available
to convert the standard freshwater toilet to raw
water. The kit contains the electrical relay, hose
insert adapter and related hardware.
inSTALLATiOn nOTES
• See Notes from Fresh Water System.
• Seacock must be full-flow, marine-quality valve (not
screw-to-close type).
• Use primary and secondary raw water filters.
• Raw water pump MUST NOT be demand type. Pump
is controlled by signal from Control Module near toilet.
• Position vented loop as shown between discharge
side of water pump and toilet. Must be equipped
with integral check valve that permits air into line to
prevent siphoning.