PVI MAXIM Manuel utilisateur

PV 6684 5/02 1

SPECIFICATION FOR DOMESTIC WATER HEATERS

Vertical Tube, Gas/Oil Fired Water Heaters with Nickel-Plated Storage Tanks

Furnish and install MAXIM power combustion gas/oil water heater(s) as manufactured by PVI Industries, L.L.C.

of Fort Worth, Texas. Supply quantities and model numbers as indicated on the plumbing schedule.

Gas and Electrical Consumption

The water heater will operate at 83% thermal efficiency. The water heater will comply with paragraph 7.2.4.4,

the thermal efficiency, the standby loss, and all other requirements of ASHRAE 90.1-1999.

Pressure Vessel and Heating Surfaces

The water heater will be a vertical fire tube design that is constructed and stamped in accordance with Section IV,

Part HLW of the ASME code. Both the storage and heating sections of the water heater will be National Board

Registered for a working pressure of 150 psi and will be pressure tested at 1-1/2 times working pressure. The fireside of

the heating surfaces will be of boiler-grade steel. The waterside of the heating tubes will be sealed in copper. The

heating tubes will be rolled, beaded, and seal welded into the tube sheets. The combustion side of the tube sheet will be

insulated by a layer of ceramic fiber that will protect the tube sheet from both thermal stresses and failure that can result

from the accumulation of scale and precipitants.

Tank Lining

The tank will be a plated with electroless nickel (EN). Plating will occur after the pressure vessel is completely

fabricated and all welding is completed. The EN plating will be a high-phosphorus (10%) and nonporous composition

suitable for submersion service (ASTM B733 standard may be used as a guideline). The finished lining will not require

sacrificial anode rods. For additional protection against galvanic corrosion, which may occur within the potable water

system, the EN plating may have a high-dielectric-strength polymer overcoat.

Burner and Venting

Combustion will be provided by a forced-draft combination gas/oil burner with gas and oil components meeting the

following agency requirement for the input specified:

___ UL (standard) ___ FM ___ IRI ___ Other ______________________

Water heater will be a category I, non-condensing appliance utilizing type B venting material. Burner will be

configured to accept ____ room air _____ direct inlet combustion air.

(continued)

PV 6684 5/02 2

SPECIFICATION FOR DOMESTIC WATER HEATERS

Vertical Tube, Gas/Oil Fired Water Heaters with Nickel-Plated Storage Tanks

(continued)

Safety Controls

As a minimum, the heater will be equipped with the following:

•electronic flame monitoring with pre-purge

•two immersion operating thermostats

•an immersion temperature limiting device

•an ASME- or AGA-rated temperature and pressure relief valve

•and options as selected on form PV 6679

Warranty Summary

The burner and all heater parts will have a one-year warranty. Storage tank, heating surfaces, and combustion

chamber will have a ten-year warranty covering manufacturing or material defects, leaks, and/or the production of rusty

water. Tank and heating surfaces will have a three-year warranty against failure due to scale buildup with no provisions

for periodic cleaning. The heater will have a _____ first year or ____ long-life service policy, which will cover replacement

labor and freight costs under certain conditions. Initiation and /or continuation of warranty coverage will not be

dependent upon annual inspections, regular replacement of anode rods, or water chemistry. Complete copies of all

warranties and service policies, including all exclusions and conditions, will be presented to the owner as part of the

submittal package. These summaries are not warranties. Consult warranty and policies for full details.

Finishing

The storage and heating sections will be completely factory packaged, requiring only job site hookup to utilities,

venting, and plumbing. The heater will be insulated, jacketed with enameled steel panels, and mounted on heavy-duty

channel skids. The heater will fit properly in the space provided and installation will conform to all local, state, and

national codes.

Start Up

Start up on the unit will be performed by factory trained and authorized personnel. A copy of the start up report will

be provided to the owner.

Quality Certification and Safety Standards

The heater will be have an independent test laboratory listing to safety standard UL 795 or ANSI Z21.10.3. The

water heaters will be manufactured by a company that has achieved certification to the ISO 9001 International Quality

System.

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