Aqua-Hot 375-LP Installation Manual download pdf (Page 28)

375-LP Installation Manual

SECTION 5: DOMESTIC WATER SYSTEM

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Domestic Water System Requirements:

NOTE:As stated directly from the ANSI A119.2/NFPA

501C Standard on Recreation Vehicles, 1993 Edi-

tion:

“Piping Systems shall be sized to provide an ade-

quate quantity of water to each Plumbing Fixture

at a flow rate sufficient to keep the Fixture in a

clean and sanitary condition without any danger of

back-flow or siphoning.”

The Aqua-Hot is equipped with a pressure-relief

valve, which releases excessive pressure in the do-

mestic water system, if necessary, as well as a tem-

pering valve in order to regulate the temperature

of the hot water.

NOTE:A water heater or ice maker shall not be counted

as a “water-using fixture” when computing pipe

sizes.

Domestic Water System Plumbing:

1. Connect a domestic water plumbing line from

the domestic water demand pump/water mani-

fold to the cold water inlet port on the Aqua-

Hot. Reference Figures 33 and 34.

2. Connect a domestic water plumbing line from

the Aqua-Hot’s hot water outlet port to the hot

water system’s distribution lines/water manifold.

Reference Figures 33 and 34.

Use the RVIA-provided table below in order to de-

termine the proper sizing of pipe and tubing re-

quired to insure maximum efficiency.

The size of water supply piping and branch line shall

not be less than specified in the table below.

NOTE:Please note that it may be necessary to utilize an

accumulator tank within the domestic water sys-

tem. Reference Figure 34. Although the Aqua-Hot

is equipped with a pressure-relief valve, the use of

an accumulator tank will help prevent excessive

“weeping” of the valve. Manufacturers of pressure

-relief valves indicate that excessive weeping of

these valves will cause the “seat” in the valve to

deteriorate, and, in turn, the valve will fail prema-

turely. For additional information regarding accu-

mulator tanks, please be sure to reference the Rec-

reational Vehicle Industry Association’s (RVIA)

technical publication titled “Recreational Vehicle

Plumbing Systems.” To obtain a copy of this par-

ticular publication, please contact RVIA at (703)

620-6003 or visit them online at www.rvia.org.

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