background image

PV 6127b  6/01 

SPECIFICATION FOR DOMESTIC WATER HEATERS 

Atmospheric Combustion, Gas-Fired Water Heaters  

with Polymer-Lined Storage Tanks 

 

 
 

Furnish and install atmospheric gas water heater(s) as manufactured by PVI Industries, L.L.C. 

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 80% 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.  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 

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 third-party tested to and comply with NSF 61standard. 

 

 

be continuous and nonporous with no interruptions or discontinuities.  

  require 

no 

sacrificial anode rods for protection. 

 
 

Burner and Venting 

 

 

Combustion will be provided by an atmospheric burner with a gas train meeting the following agency requirement for 

the input specified: 
 
 

 

___ UL  (standard) 

____ FM  

___ IRI   

___ Other ______________________ 

 

 

Water heater will be a category 1, non-condensing appliance.  It will be UL-listed for use with non-pressurized, type 

B venting material. 

 

Safety Controls 

 
 

As a minimum, the heater will be equipped with the following: 

 

electronic flame monitoring 

 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 6071 

 
 

(continued) 

Отзывы: