SPECIFICATION FOR DOMESTIC WATER HEATERS
Power Combustion, Gas-Fired Water Heaters with Polymer-Lined Storage Tanks
Furnish and install the following MAXIM gas water heater(s) as manufactured by PVI INDUSTRIES, INC of Fort Worth,
Texas.
Model
Number
Btu/h
Input
GPH Recovery Storage
40° to _____°F Tank Size
Qty
___
____________
____________
____________
__________ ________
__________ ________
__________ ________
_______ gallons
_______ gallons
_______ gallons
___
___
Gas and Electrical Consumption
The water heater will operate at 83% thermal efficiency.
Each water heater will have a burner motor with the following maximum electrical ratings:
Heater Model Number
Heater Btu/h Input
Motor Horsepower
Voltage
Amps
______________ ___________
______________ ___________
______________ ___________
_____
_____
____
_____
_____
_____
_____
____
____
To conserve energy, the water heater will not utilize a continuously operating, integral circulation pump between the
storage and heating section.
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. For maximum
thermal strength, the fireside of the heating surfaces will be of boiler-grade steel. For corrosion protection, 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 lining will:
be applied only after the tank is completely fabricated and all welding is completed.
consist of multiple applications of high-temperature fluoropolymer.
be continuous and nonporous with no interruptions or discontinuities.
require no sacrificial anode rods for protection.
(continued)
PV 1010b 5/99
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SPECIFICATION FOR DOMESTIC WATER HEATERS
Power Combustion, Gas-Fired Water Heaters with Polymer-Lined Storage Tanks
(continued)
Quality Certification • Safety and Performance Standards
The water heaters will be manufactured by a company that has achieved certification to the ISO 9001 International
Quality System, which requires regular external auditing of all order entry, engineering design, and product
manufacturing processes.
The heater will be U.L. listed and ULC listed to safety standard UL 795 “Commercial – Industrial Gas Heating
Equipment” or AGA listed to ANSI Z21.10.3 “Gas Water Heaters.”
The heater will satisfy current Federal Energy Policy Act (EPACT) standards for both thermal efficiency and standby
heat losses as established for gas-fired water heaters incorporating storage tanks.
PV 1010b 5/99
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