Bradford-White Corp B4 用户手册

下载
页码 32
Internet Version for Reference Only
 
BRADFORD WHITE
Page 22
Copper Brute B4 Volume Water Heaters
Page 23
Electronic Pilot
Standing Pilot
Figure 31.  Flame patterns.
SECTION 4.
Maintenance
4.1  General Instructions
1.      Oil the water circulating pump in accordance 
with the manufacturer's instructions.
2.      If a strainer is used in a pressure reducing valve 
or in the piping, clean it every 6 months in 
accordance with the manufacturer's instructions.
3.      At startup and every 6 months after, look at 
the pilot and main burner flame (see Figure 
31). If the flame has the appearance of sooting 
tips, check for debris near orifices. Call service 
technician. 
4.      Inspect the venting system for blockage, leakage, 
and corrosion at least once a year.
5.      Keep the heater area clear of combustible 
material, gasoline, and other flammable liquids 
and vapors.
6.      Be sure all combustion air and ventilation 
openings are not blocked.
7.      Check for black carbon soot buildup on the 
external surfaces of the heat exchanger every 6 
months. 
8.      Do not use the heater if any part has been under 
water. Replace any part of the control system and 
any gas control which has been under water.
NOTE: After installation and first startup, check 
the heat exchanger for black carbon soot buildup after 
the following periods of operation: 24 hours, 7 days, 
30 days, 90 days, and once every 6 months thereafter.
4.2  Replacement of Gas Controls
The gas and electric controls installed on the 
heaters are designed for both dependable operation and 
long life. Safe operation of the heater depends on their 
proper functioning. 
NOTE: The warranty does not cover damage 
caused by lack of required maintenance or improper 
operating practices.
 
WARNING
Never attempt to repair the gas valve. Such 
attempts will void the warranty, and could lead to 
dangerous results.
If the gas valve is found to be defective, replace 
it by following these instructions.
1.      Turn off electrical power to the heater.
2.      Turn off the main gas supply at the manual gas 
cock outside the heater jacket or at the meter.
3.      Remove the front access door on the heater.
4.      Disconnect the service union in the gas line, and 
unscrew the main gas pipe from the gas valve 
(see Figure 32).
5.      Remove the two screws that fastens the anti-
rotation bracket on the left side of the gas valve 
(see Figure 32), and the three screws attached to 
heater.
6.      Remove the pilot gas tube and copper 
thermocouple shield, if present, from the gas 
valve.
 
Caution
Label all wires prior to disconnection. Wiring errors 
can cause improper and dangerous operation.
7.      Tag and remove all wires from the gas valve 
terminals.
8.      Pull the burner tray out of the heater (see 
Figure 32).
9.      Screw the new gas valve onto the manifold pipe. 
Make sure the arrow on the bottom of the gas 
valve that indicates the direction of gas flow is 
in the proper direction. Also make sure the brass 
fitting is on the right side.
10.    Connect the pilot gas tube to the pilot assembly 
and thermocouple to the gas valve.