Bradford-White Corp BWCH Manual De Usuario

Page 38

• Parallel piping (non-

  primary/secondary) 

  hydronic system 

1 

• None

• DHW with or without

  a tank aquastat
• Primary/secondary 

  hydronic system 

2 

• Bradford White System

  (pref'd by Bradford White) 

 

  Sensor (shipped

• No outdoor reset 

 

  with each Copper Brute II)

• Parallel piping (non-

  primary/secondary) 

  hydronic system 

3 

• Bradford White System

• DHW 

 

 

  Sensor (shipped (with

• Advanced control  

 

  each Copper Brute II)

 capability

• No outdoor reset
• Parallel piping (non-reset 

 

• Bradford White outdoor

  primary/secondary) 

 

  sensor (optional

  hydronic system 

4 

  part #R2014000)

• Advanced control 

 

 

  capability  

 

• Outdoor reset 

 

 

• Primary/secondary 

 

• Bradford White System

  hydronic system 

5 

  Sensor (shipped

  (preferred by 

 

  with each

     Bradford White) 

 

  Copper Brute II)

• Outdoor reset 

 

• Bradford White outdoor  

   

 

 

   reset sensor (optional part

   

 

 

  # R2014000)

• Building automation
 control

• Multiple boiler system 

6 

• None

 control

• Energy management
 system
• Other external control

contact the factory.

There are three black programming buttons on 

the Temperature Control (see 

Figure 25

). Press and 

hold all three programming buttons until the word 

ADJUST appears in the upper right corner of the LCD 
display (it replaces the word 

VIEW).

Pressing 

 cycles you through the items you 

need to program. 

 increases the value of 

that item, while 

 decreases it. ADJUST 

mode exits if you don’t press a button for 20 seconds. 
To return to 

ADJUST mode, simply press and hold the 

three buttons again.

The first item is MODE; enter the mode number 

as determined above. The Temperature Control will 
then present you with some or all of the following 
options, depending on the mode you have chosen:

In mode 6 (external boiler control), you will not 

see the following options. Refer to 

Section 6.4.10

 for 

setup information for mode 6.

 
FOR ALL OTHER MODES:

BOIL MASS (Boiler Mass): Always choose “1”.

BOIL TARGET (Boiler Target Temperature): 

Your desired set-point temperature. See 

Section 6.4.5

 

and 

Figure 26

 for more information.

BOIL MIN (Boiler Minimum Temperature): This 

setting tells the Temperature Control to maintain at 

least this temperature, even if the PID logic determines 

a lower setting would save energy. The BOIL MIN 

should always be 120°F (49°C) or higher to prevent 

condensation, and can be set up to 10°F below your 

BOIL TARGET temperature. See 

Section 6.4.3

 for 

more information.

BOIL MAX (Boiler Maximum Temperature): 

This setting tells the Temperature Control to limit the 

maximum outlet temperature to this setting or below, 
and determines how quickly the temperature control 

“stages down” or off. If the BOIL MAX setting is 

much higher than the BOIL TARGET temperature, the 

temperature control will fire all stages until the target 
temperature is reached, and then shut down all stages 

at once. To enable gradual staging down of the boiler 

as you approach your target temperature, set the BOIL 

MAX to the same setting as the target temperature. See 

Section 6.4.4

 for more information.

DIFF 

(Boiler Differential): This setting is divided 

above and below the target temperature. The water 
will be allowed to cool ½ this setting below the target 

temperature before first stage fires, and will heat to ½ 
this setting above the target temperature before staging 

the boiler down. See 

Section 6.4.1

 and 

Figure 28

 for 

more information.

PUMP DLY (Pump Delay): On pump mounted 

units, the boiler mounted pump continues to run for 
the time selected after the heat demand in the system is 

satisfied. This setting also affects the 24VAC output on 

the “PMP” “PMP” terminals (see 

Section 5.2

). These 

terminals can power a contactor for a larger system 

pump. Bradford White recommends a minimum pump