Inspecting the Heat Exchanger | Bradford-White Corp B4 manual

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Copper Brute B4 Volume Water Heaters	Page 25

21.Install the front access door on the heater.

22.Turn all electrical power to the heater on.

4.3 HEAT EXCHANGER

4.3.1 Inspecting the Heat Exchanger

To check the scale buildup, periodically inspect the tube having the highest temperature as follows:

1.Open the drain valve on the left side of the heater.

2.Remove the hex-head plug located on the right side of the heater under the in/out header (see Figure 34). Perform this inspection after 60 days of and after 120 days of operation. This will establish a regular inspection routine.

Plug

Figure 34. Scale inspection.

4.3.2 Cleaning the Heat Exchanger

An inspection and cleaning of the complete heat exchanger can only be done by removing it from the heater.

1.To remove the heat exchanger, refer to Section 2.6.1.

Caution

Black carbon soot buildup on a dirty heat exchanger can be ignited by a random spark or flame. To prevent this happening, dampen the soot deposits with a wet brush or fine water spray before servicing the heat exchanger.

2.Remove the heat baffles and check for a light accumulation of soot or corrosion on the outside of the heat exchanger tubes.

NOTE: While the heat exchanger is out of the heater, inspect the firewall refractory insulation blocks for cracks, wear, and breakage. Replace if necessary.

3.Use a wire brush to remove soot and loose scale from the heat exchanger. Do not use water or compressed air for cleaning.

NOTE: Use only the correct carbide tipped reamers which are available from Bradford White.

4.Ream the insides of the tubes (see Figure 35).

5.Pull the reamer out frequently to remove lime powder and prevent the drill from binding in the tube.

6.Install new gaskets. Do not reuse the old ones.

7.Tighten the header bolts progressively, starting with the two center bolts. Maximum torque is 20 inch pounds (27 Nm). Do not over-torque.

	City
	Water	400-500 RPM
	Supply	400-500 RPM
	Supply	Drill Motor
		Drill Motor

Notes:

1.When pressure relief valve is used, it must be removed and the hole plugged, as shown.

2.Remove the plug before reinstalling the heat exchanger.

Figure 35. Heat exchanger tube cleaning.

B4 specifications

Bradford-White Corp B4 is a remarkable water heater that embodies innovation, efficiency, and reliability. This product is designed to meet the stringent demands of both residential and commercial applications, making it a versatile choice for various users.

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