Bradford-White Corp B4 用户手册

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Page 16

Copper Brute B4 Volume Water Heaters

Page 17

NOTE:  These systems are not allowed in the 

Commonwealth of Massachusetts.

Piping and components connected to this water 

heater for the space heating application shall be 

suitable for use with potable water.

Toxic chemicals, such as used for boiler 

treatment, shall not be introduced into the potable 

water used for space heating.  Do not use solder 

containing lead in the potable water lines.

This water heater when used to supply potable 

water shall not be connected to any heating system 

or components(s) previously used with a non-potable 

water heating appliance.

potential. Some jurisdictions may require a backflow 

preventer in the cold water line. In such cases, the 

temperature and pressure relief valve may discharge 

water due to expansion. A diaphragm type expansion 

tank will normally eliminate this condition. Follow 

the manufacturer's instructions for installation of the 

expansion tank.

NOTE: Safe lighting and other performance 

criteria were met with the gas manifold and control 

assembly installed on the heater during tests specified 

in ANSI Z21.13.

11.    Before operating the heater, test the complete gas 

supply system and all connections for leaks using 

a soap solution.

 

Since some leak test solutions (including soap and 

water) may cause corrosion or stress cracking, rinse 

the piping with water after testing.

Liquefied petroleum (LP) gas is heavier than 

air. Therefore, do not install heaters using LP gas in 

a pit or locations where gas might collect. Locate 

heaters a safe distance from LP gas storage and filling 

equipment. Consult local codes and fire protection 

authorities about specific installation restrictions.

Electrically ground the heater in accordance with 

the latest edition of the National Electrical Code, 

ANSI/NFPA 70. In Canada, use C22.1. Do not rely 

on the gas or water piping to ground the metal 

parts of the heater. Often, plastic pipe or dielectric 

unions isolate the heater electrically. Service and 

maintenance personnel who work on or around the 

heater may be standing on wet floors and could be 

electrocuted by an underground heater. 

1.      Check heater wiring and pump for correct 

voltage, frequency, and phase. Check to make 

sure heater is wired for 120 volts alternating 

current (VAC). If 240 VAC, contact local factory 

representative or Bradford White.

2.      Wire the heater and pump exactly as shown in 

the wiring diagram supplied with the heater. 

See Figure 26 and 27 for a typical example of a 

wiring diagram.

3.      Electrically interlock the pump and heater so 

the heater cannot come on unless the pump is 

running.

4.      Connect all field-installed devices (draft 

switches, relays, timers, outdoor temperature 

reset devices, etc.) to the heater wiring at points 

labeled Field Interlock (see Figures 26, 27, 28 

and 29). 

Mixing Valve

Out —

Mixed Water

For Potable Use

Hot Water

From Water Heater

or Storage Tank

Cold Water

Supply