Bradford-White Corp B4 用户手册

Internet Version for Reference Only

Page 24

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.

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.

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.

 

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.

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.

City

Water

Supply

400-500 RPM

Drill Motor

Plug