Bradford-White Corp 500-1825 Manual De Usuario

Internet Version for Reference Only

Page 8

B4 Volume Water Heater

Page 9

Figure 9), must be piped, but not fastened, to a 

drain or floor sink. The drain pipe must be the 

same size as the valve outlet and must pitch 

downward from the valve.

         Special attention must be given to relief valve 

settings in installations where the heater is 

located on the ground floor of a tall building. The 

static pressure of the system is elevated and could 

cause the relief valve to leak. Where no special 

will furnish a 125 psi setting. Never reduce the 

relief valve openings.

3.      Pressure relief valve lever must be tripped at 

least once a year to insure that waterways are 

clean. When manually operating lever, water will 

discharge through drain line. Precautions must be 

taken to avoid contact with hot water and water 

damage.

4.      The weight of all water and gas piping should be 

supported by suitable hangers or floor stands.

5.      Check piping diagrams with local applicable 

plumbing, heating and building safety codes.

6.      All two-temperature systems using temperature 

valves must have forced recirculation in the low 

temperature building loop.

7.      A check valve installed at the hot water inlet to 

the tempering valve will prevent cold water from 

being drawn in reverse through the tempering 

valve into the hot water.

8.      When installing a tempering valve, place at 

bottom of antithermosyphon loop at least 24" 

high to prevent excessive hot water from entering 

mixed water supply. Bring the cold water supply 

up from the floor to the valve (see Figure 10).

When cold water is heated the water expands. If 

no water is being used during the heat-up period the 

expanded water will normally back up into the city 

mains.

A water pressure reducing valve installed in the 

incoming cold water line may act as a check valve and 

prevent the expanded water from moving backward. 

This will cause pressure to rise in the heater, which 

will be relieved by the pressure relief valve.

If the relief valve pops frequently a mineral 

deposit may build up on the valve seat, causing it to 

leak.

The  following  suggestions  may  solve  the 

problem:
1.      Install a properly sized expansion tank.
2.      Replace the installed water pressure reducing valve  

with a suitable valve having a back flow port. These 

valves have a back flow port which allows water  

to flow backwards when the pressure in the system 

exceeds the pressure in the mains.

3.      Install an auxiliary small relief valve set at 25 psi 

less than the main relief valve. The valve must 

be piped to a drain and may require occasional 

cleaning. It will bleed off the expanded water 

and protect the main pressure relief valve from 

becoming fouled.

1.      The factory provided pumps on all Copper Brute 

heaters are sized to provide proper circulation 

through the heater and heater-to-tank circulation 

loop (see Figures 11 and 12). If the heater-to-tank 

circulating loop does not contain more than 6 

elbows or 30 feet of pipe, use pipe fittings in the 

loop no smaller than the following:

                     Model                              Pipe Size
             500 through 850                            2"

           1010 through 1825                       2-1/2"

Pressure

Relief

Valve

Hot

Water

Hot

Water

Storage

Tank

Floor

Automatic

Tempering

Valve

Cold

Water

Tempered Water

24"