SeaLand VHT 4500 Holding Tank - 140 Series VacuFlush Toilet User Manual
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System Features .........................................1
System Specifications ................................1
Product Specifications, Dimensions ............ 2
Warnings ....................................................3
Toilet System Components ..........................4
Installation ..............................................5 - 8
Before Operation .........................................9
System Start-Up ..........................................9
Toilet Operation ...........................................9
Holding Tank Pump-out .............................10
WaRninGs
SeaLand vacuum toilet systems must be installed
according to Dometic’s recommended proce-
dures. Dometic also recommends that a qualified
marine technician or electrician install or service
this product. Equipment damage, injury to person-
nel or death could result from improper installa-
tion. DOMETIC SANITATION CORPORATION
ACCEPTS NO RESPONSIBILITY OR LIABILITY
FOR DAMAGE TO EQUIPMENT, OR INJURY OR
DEATH TO PERSONNEL THAT MAY RESULT
FROM IMPROPER INSTALLATION, SERVICE
OR OPERATION OF THIS PRODUCT.
WaRninG!
haZaRD oF FlooDinG – If the toilet
system is connected to ANY through-the-hull
fittings, properly installed seacocks MUST be in-
stalled in all piping connected to through-the-hull
fittings. Seacocks MUST be easily accessible to
all users of the toilet system or secondary valves
fitted in hoses where they are easily accessible.
ALWAYS close seacocks when toilet system is
not in use (even if boat is unattended for a brief
period. All valves MUST be full bore valves and
marine quality. Screw-to-close gate valves are
not recommended. Failure to comply can result
in flooding which can cause loss of property
and life.
WaRninG!
haZaRD oF FlooDinG – If toilet is
connected to ANY through-the-hull fittings, ALL
flexible hoses must be of marine sanitation qual-
ity and must be secured to ANY fittings (such as
those at seacock, vented loop or toilet) with two
stainless steel, worm-drive hose band clamps at
each connection. Connections MUST be checked
frequently for integrity. Failure to comply can
result in flooding which can cause loss of property
and life.
WaRninG!
haZaRD oF FlooDinG – If toilet rim is
below the waterline at ANY time (during any con-
ditions of heel, load or trim) and is connected to
ANY through-the-hull fittings, properly positioned
ventilated (vented) loops MUST be installed in
intake* or discharge piping to prevent potential
back siphonage of seawater into the boat. Failure
to do so can result in flooding which can cause
loss of property and life.
* if connected to raw water
WaRninG!
haZaRD oF FlooDinG – If the toilet
uses fresh water for flushing and is connected
directly or indirectly to a shoreside municipal
water system at ANY time, shoreside water con-
nections MUST be disconnected if the boat is
unattended (even for a brief period). Failure to
comply can result in flooding which can cause
loss of property and life.
WaRninG!
haZaRD oF FlooDinG – If toilet uses
raw water for flushing at ANY time, a raw water
pump controlled by an automatically 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 can cause loss of property and life.
WaRninG!
haZaRD oF FlooDinG – Before be-
ginning any work on this product, be sure that all
electrical power to the unit has been turned off.
Failure to do so can result in flooding which can
cause loss of property and life.
WaRninG!
haZaRD oF shocK oR FiRE –
Always use recommended fuse, circuit breaker
and wire size. Failure to do so can result in fire
that can cause the loss of property and life.
cauTion: Overfilling the holding tank
can create serious damage to the sanita-
tion system, such as rupturing the holding tank
and releasing tank contents into the bilge. To help
prevent this possibility, the VHT4500 includes a
“full” tank safety shut-down relay to the vacuum
pump. The “full” signal is generated by a built-in
tank level probe.
TablE oF conTEnTs
Proper Bowl Cleaning ...............................10
Clearing Discharge Lines .......................... 11
Winterizing ................................................. 11
Maintaining the System ............................. 11
Deodorants and Special Tissue ................12
Marine Sanitation Regulations...................12
Troubleshooting ..................................13 - 15
Toilet Model Identification ..........................15
Ordering Parts ...........................................15
Customer Service and Warranty ...............16