SeaLand SailVac VHT 5200 - Manual (Page 9)

9
SailVac Vacuum Holding Tank Installation
5 . With electrical power off, make electrical connections according to the wiring schematic shown
on the parts list provided with this unit . Electrical installation must follow ABYC standards and
should be performed by qualified personnel only .
Caution!
Failure to follow the procedures above may result in vacuum leaks or inefficient flushing.
Caution – Flooding Hazard!
If the toilet, holding tank or any components are connected to any through-hull fittings,
properly installed seacocks must be installed in all piping connected to the through-hull
fittings . Seacocks must be easily accessible to all users of the system . All valves must be
full-bore valves and of marine (corrosion resistant) quality . Screw-to-close gate valves are
not recommended. Failure to do so can result in flooding, which can cause the loss of life
and property .
Caution – Flooding Hazard!
Some marine practices and/or standards require the installation of a properly positioned
ventilated (vented) loop in the discharge piping to prevent back-siphonage of seawater
into the holding tank . It is up to the system installer and boat owner to select appropriate
means of preventing backflow into the holding tank.
7 Operation
7.1 System start-up
1 . Fill freshwater tank, then turn on inlet water supply to VacuFlush toilet .
2 . Turn on electrical power to vacuum holding tank (VHT) .
3 . VHT unit may take up to three minutes to initially charge vacuum level and recharge between
flushes.
7.2 Normal operation
VACUUM FLUSHING ACTION
Every time the VacuFlush toilet is flushed, the VHT unit pulls wastewater from the toilet to the holding
tank. The vacuum pump then runs until the proper vacuum level is achieved for the next flush.
Follow flushing instructions in VacuFlush toilet operation manual.
“3/4” and “FULL” TANK PROBES
When the holding tank contents activate the “3/4” tank probe, a signal is sent to a yellow warning
light on the SeaLand tank monitor panel (optional) . When the tank reaches “full”, a signal is sent
to the red light on the panel, and to a shutdown relay which turns off electrical power to the toilet
system. This prevents the VacuFlush toilet from flushing and overfilling the VHT. The VHT must be
emptied before electrical power is restored for normal VacuFlush toilet operation .
7.3 Holding tank pump-out operation
To assure thorough discharge of vacuum holding tank, follow these steps:
1 . Turn off electrical power to VHT at circuit breaker and water supply to VacuFlush toilet .
This prevents vacuum pump from starting during pump-out operation .
2 . For foot-pedal VacuFlush toilets with built-in pedal lock, follow instruction in toilet operation manual
to keep flush ball in toilet open for holding tank pump-out operation. For electronic VacuFlush
toilets, follow Service Mode instructions for keeping the flush ball open. For all other VacuFlush
toilets, make sure flush ball stays open to allow air into VHT unit during pump-out operation.