Bradford-White Corp 500-1825 warranty Water Pressure, Tank Installation

Internet Version for Reference Only	BRADFORD WHITE
Page 10

If the heater-to-tank circulating loop contains more than 6 elbows or 30 feet of pipe, use pipe or fittings in the loop no smaller than the following:

Model	Pipe Size
500 through 850	2-1/2"
1010 through 1825	3"

Pump performance requirements are provided in Table 4 for reference purposes.

To assure free circulation, do not use globe valves, side outlet tee connections or other restrictive fittings in heater-to-tank loop.

2.Copper Brute heaters are not suitable for heating swimming pools or any other application where temperature of the water flowing through the heater remains below the dew point (110°F).

In applications requiring the rapid use of measured volumes of water, the recovery of the heater between the time intervals of use must equal the volume used.

2.9Water Pressure

It is very important that water pressure in the

system be maintained above 30 psi. If the system pressure should drop below this, the vapor pressure of water in the suction side of the pump can cause hammer and cavitation in the pump and damage the heater through lack of water circulation.

2.10 Tank Installation

1.Be sure the floor is waterproof and structurally capable of supporting the tank when it is filled with water.

2.The tank should be placed so that manholes, inspection covers, nameplates and drain valves are accessible.

3.Be sure the tank is suitable for the water in the system. Some water is corrosive and requires a protected tank with a special lining.

4.If the tank is glass-lined, it should be equipped with a suitable magnesium anode. It is good practice to replace the anode when it is approximately 50% used. The factory warranty on a glass-lined tank will be void if a satisfactory anode is not in place at the time of a failure or if it is consumed by cathodic action.

5.Make sure the tank connections in the heater- tank circulating loop are the proper size as listed in Section 2.8. If tappings are smaller than the recommended pipe size, a larger pump may be required. Consult the factory if in doubt.

			Flow	Head*	Temp. Rise
		Water	Rate	Loss	Across
	Model	Category	(GPM)	(ft.)	Heater, (°F)
		Soft	45	5.0	17
500		Normal	68	9.9	11
		Hard	90	15.7	8
		Soft	45	5.1	20
600		Normal	68	10.0	14
		Hard	90	15.9	10
		Soft	45	5.3	24
715		Normal	68	11.0	16
		Hard	90	17.8	12
		Soft	45	5.4	30
850		Normal	68	11.1	20
		Hard	90	18.1	15
		Soft	45	3.9	35
1010		Normal	68	7.5	23
		Hard	90	11.7	18
		Soft**	68	7.8	27
1200		Normal	68	7.8	27
		Hard	90	12.2	21
		Soft**	68	8.1	32
1430		Normal	68	8.1	32
		Hard	90	12.6	24
		Soft**	68	8.3	37
1670		Normal	68	8.3	37
		Hard	90	13.0	28
		Soft**	90	13.5	30
1825		Normal**	90	13.5	30
		Hard	90	13.5	30

Water Category	Grain Hardness per Gal.
Soft	1 through 7.5
Normal	7.6 through 17
Hard	Over 17

* Pressure drop includes loss through 30 feet of pipe and normal fittings when heater is installed with storage tank. Pipe and fittings are assumed to be 2" on Models (500-850) and 2 1/2" on Models (1010-1825)

** To prevent erosion, these models must be ordered with cupro-nickel heat exchanger tubes.

Table 4. Pump Performance Requirements.

6.Install a pipe in the tank drain fitting that goes to a floor sink, and install a drain valve. If a floor sink is not available, install a hose bib.

7.Hot water tanks in an existing installation are likely to have a deposit of silt on the bottom. Therefore, it is important to extend the pump suction pipe in the tank to a position near the top. Pipe the return from the heater to the bottom of the tank.

8.Incorrect installation can cause rapid failure of water tanks due to electrolysis. Tanks must be installed with dielectric connections to electrically isolate the tank from stray current. Note that the use of brass or bronze connectors does not replace the need for dielectric connections.