PVI MAXIM User manual

PV 6315 4/04 1
SPECIFICATION FOR DOMESTIC WATER HEATERS
Power Combustion, Low NOx, Gas-Fired Water Heaters with Nickel-Plated Storage Tanks
Furnish and install MAXIM power combustion gas water heater(s) as manufactured by PVI Industries, LLC
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 a minimum of 82% 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. All tank
connections will be non-ferrous. 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 power burner with a gas train meeting the following agency
requirement for the input specified:
___ UL (standard) ___ FM ___ IRI ___ Other ______________________
Burner and heating section will be certified to operate with NOx emissions not to exceed 30 ppm corrected to 3% O2
(at or above 400,000 Btu) and 55 ppm corrected to 3% O2 or 40 nanograms per joule (below 400,000 Btu). Water
heater will be a category I, non-condensing appliance. It will be UL listed for use with non-pressurized, type B venting
material.
(continued)

PV 6315 4/04 2
SPECIFICATION FOR DOMESTIC WATER HEATERS
Power Combustion, Low NOx, Gas-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- and post-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 6382
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.