SPECIFICATION FOR DOMESTIC WATER HEATERS
Condensing, Gas-Fired Water Heaters with Polymer-Lined Storage Tanks
Furnish and install the following POWER VT® gas water heater(s) as manufactured by PVI INDUSTRIES, INC of Fort
Worth, Texas.
Model
Qty
Number
___
____________
___
____________
___
____________
The water heater will operate at a thermal efficiency of 94% when tested to ANSI Z21.10.3. The water heater will
comply with paragraph 7.2.4.4, the thermal efficiency and the standby loss requirements of ASHRAE 90.1-1999.
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.
The lining will:
be applied only after the tank is completely fabricated and all welding is completed.
consist of multiple applications of a high-temperature fluoropolymer.
be continuous and nonporous with no interruptions or discontinuities.
require no sacrificial anode rods for protection.
Combustion will be provided by an induced-draft power burner that can operate with as little as 4-1/2 inches water
column of gas pressure. The water heater will be UL listed for use with plastic venting materials. The heater will be
capable of directly venting inlet air rated @ 120 equivalent feet and exhaust rated as follows: 4" vent - 50 equivalent feet
on 1 MBtu/h model, 100 equivalent feet for other inputs; 6" vent – 390 equivalent feet on 1Mbtu/h model, 500 equivalent
feet for other inputs.
The burner will be equipped with a gas train meeting the specifications of:
___ UL (standard equipment)
PV 6150b 2/02
Btu/h
Input
__________
__________
__________
Efficiency
Pressure Vessel and Heating Surfaces
Lining
Burner and Venting
___ FM
___ IRI
(continued)
1
GPH Recovery
Storage
40° to _____°F
Tank
________
_______
________
_______
________
_______
___ Other ______________________
gallons
gallons
gallons
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