SeaLand VACUUM HOLDING TANK Table Of Contents, Product Features, Major Components, Vacuum Toilets

TABLE OF CONTENTS
Product Features	. . . 2
Major Components	. . . 2
Principles of Operation	. . . 3
System Layout	. . . 3
Component Locating Procedure	. . . 4
Key Installation Points	. . . 4
Installation of Components	. . . 5
Winterizing	. . . 6
Troubleshooting Guide	6 - 7
Dimensional Specifications	. . . 7
Manufacturer’s One-Year Limited Warranty . . . .	. . . 8

PRODUCT FEATURES

The Vacuum Holding Tank (VHT) brings the technology, comfort and efficiency of Dometic’s renowned VacuFlush® vacuum sanitation systems to smaller boats in an easy-to-use, and easy-to-maintain package.

Simple Installation

•All system components are “installation ready.”

•No solvent bonding is required.

•Removable hose insert fittings make hose installation simple.

•Vacuum pump and switch are pre-wired at factory.

•Easy to mount.

Reliability is Built-In

•No impellers or macerators. Motor can run without burning up.

MAJOR COMPONENTS

The Vacuum Holding Tank (VHT) system consists of a VacuFlush toilet or EcoVac™ toilet and the Model VHT Vacuum Holding Tank. The VHT is a unique combina- tion of the vacuum tank, vacuum pump and holding tank components used in a standard VacuFlush toilet system.

VACUUM TOILETS

The VacuFlush 500 series features a large household- size bowl and seat. The VacuFlush 1000 series also features a deep bowl with an adult-sized seat. The EcoVac series offers space-saving models with adult- sized seats. All come with an attractive, easy-to-use flush pedal.

Each toilet series consists of several models, allowing for a multitude of installation variations: a rear discharge standard height unit, a bottom discharge standard height unit, and a bottom discharge low-profile unit designed to fit on a platform.

The vacuum toilet must be purchased separately; it is not included with the VHT.

VACUUM HOLDING TANK (VHT)

The VHT produces and stores vacuum between flushes. The vacuum holding tank is made of highly durable poly- ethylene. The pump is integrally connected with the vacuum tank. The vacuum pump is electric and draws only 2 to 4 amps of current at 12 VDC.

One vacuum holding tank is required for each toilet. Two or more toilets cannot be connected to one VHT.

The VHT contains the pre-set pressure differential switch control that turns the pump on and off when the proper level of vacuum is created.

A unique component on the VHT is the Vacuum Relief Valve (VRV). The VRV prevents excessive vacuum from accumulating in the tank. The VRV is calibrated to open at 13" of vacuum and close at 11" of vacuum. This fea- ture is beneficial during pump-outs.

The VHT system comes equipped with a full level float switch. This float switch is wired directly to an automatic shutdown relay. The relay prohibits the vacuum pump from generating vacuum once the tank is full. A full level indicator light should be wired to the full float, by the installer. If a full level indicator light was not installed, order part number 318714 from Dometic. The indicator light is not part of the basic system.

VACUUM HOSE

To complete a VacuFlush installation, OdorSafe® Sani- tation Hose or rigid PVC pipe (Schedule 40 or heavier) must be used. OdorSafe hose is specially formulated to provide up to 16 times greater resistance to malodors than other “no-odor” marine hoses.

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