Bradford-White Corp BRHHV Manual De Usuario

Page 25

temperature is less than 140°F (60°C), internal mixing 
will keep the outlet temperature at 160-165°F (71-
74°C), and this will mix with the tank temperature 
to maintain a lower temperature in the tank.  If the 
return temperature is 140°F (60°C) or higher, the 
outlet temperature of the heater will be the return 
temperature plus 20-25°F (11-14°C) when the Brute 
Magnum is at high firing rate.

The manual reset high limit is on the outlet of 

the Brute Magnum.  Set the manual reset high limit at 
about 20°F (11°C) higher than the highest expected 
outlet temperature, to avoid nuisance lockouts

When an external control is not used, the 

circulator between the heater and the storage tank 
must run continuously, so that the heater’s temperature 
control can detect and control the water temperature 
in the storage tank. The Brute Magnum water 
heater’s temperature control is adjusted to its lowest 
temperature position when shipped from the factory. 
This is the preferred starting point for setting the 
temperature control.

The Brute Magnum temperature control measures 

temperature on the heater inlet, sensing return water 
temperature.  If the return water temperature is less 
than 140°F (60°C), internal mixing will keep the outlet 
temperature at 160-165°F (71-74°C), and this will 
mix with the tank temperature to maintain a lower 
temperature in the tank.  If the return temperature is 
140°F (60°C) or higher, the outlet temperature of the 
heater will be the return temperature plus 20-25°F (11-
14°C) when the Brute Magnum is at high firing rate.

The manual reset high limit is on the outlet of 

the Brute Magnum.  Set the manual reset high limit at 
about 20°F (11°C) higher than the highest expected 
outlet temperature, to avoid nuisance lockouts.

Should overheating occur or the gas supply fail to 
shut off, turn off the manual gas control valve to the 
appliance.

The Brute Magnum temperature control is 

versatile and will allow the user to better match the 
modulating control to the application. Settings that 
can be changed are temperature setpoint, differential, 
offset, throttling range, and minimum output.

The temperature setpoint is the setting at which 

the unit will shut off, having satisfied the controller’s 
call for heat.

The differential determines how far the 

temperature in the Brute Magnum can fall before 
energizing again.

The offset determines where the throttling range 

begins.

The throttling range is the temperature range 

through which the unit will modulate from minimum 
to maximum firing rate.

Important Note: These control parameters work 
together. Therefore, setting one parameter may have 
an affect on another. Figures 14, 15 and 16 show the 
relationships between these settings. Figure 14 follows 
the examples that are shown in the following sections, 
and Figures 15 and 16 are examples of how the 
parameters can interfere with each other.

The temperature setpoint is the point at which the 

temperature control relay will be de-energized and the 
unit’s call for heat will end.  The temperature setpoint 
is adjusted with the setpoint dial on the A350 control 
(see Figure 13).  The temperature control’s sensor is in 
the inlet of the unit.

Note: Jumper must be in “Reverse Acting” mode, or unit will not 
operate properly.

The differential is the difference in temperature 

settings when the temperature control’s relay is 
energized and de-energized. For instance, if the 
temperature setpoint is 120°F (49°C) and the 
differential is 20°F (11°C), the temperature control 
will call the unit to energize at 100°F (38°C). (The 
differential is the setpoint minus the differential 
setting) The call for heat will end when the unit 
reaches its setpoint of 120°F (49°C).  The Brute 
Magnum differential is adjustable from 1°F to 30°F 
(1°C to 17°C).  In general, the differential setting for a 
water heater system will be low, so that when a storage