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PV 1010b 5/99 1
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 Btu/h GPH Recovery Storage
Qty Number Input 40° to _____°F Tank Size
___ ____________ __________ ________ _______ 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)