PVI Industries manual Specification For Domestic Water Heaters

SPECIFICATION FOR DOMESTIC WATER HEATERS

Power Combustion, Gas-Fired Water Heaters with Nickel-Plated 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.

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