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Brute Magnum
Page 27
5.5.6 Integration Constant
The proportional control used on the Brute
Magnum has internal circuitry that helps to minimize
overshoot that can sometimes be associated with
proportional plus integral (PI) controls. There
are three field-selectable integration constants
(slow, medium and fast), and an off position on the
proportional control, which are selected with the
dipswitches on the control (see Figure 14). In most
cases, this setting will not need to be changed
Off: Switch 1 to ON position and all others to
OFF. Setting the control to the “Off” position puts the
control into proportional only operation. This is not a
recommended setting for the Brute Magnum.
Slow: Switch 2 to ON position and all others
to OFF. This is the slowest integration constant. It
allows the Brute Magnum the most time to reach its
setpoint. In most cases, this is too slow for Brute
Magnum installations.
Medium: Switch 3 to ON position and all others
to OFF. The integration constant is set to “Medium”
at the factory, and in most cases, will not need to be
25% and 100% of full fire between 46°C and 49°C.
Between 46°C and 49°C, the unit will remain at low
fire. Between 38°C and 41°C, the unit will be at full
fire.
The throttling range is adjustable between 2°F
and 30°F (1°C to 17°C). The range can be set by
removing the cover of the S350P control and adjusting
the “THROT RANGE” dial (see Figure 14).
5.5.5 Minimum Output Setting
The minimum output setting of the controller is
0% of full fire. However, the minimum output of the
Brute Magnum is limited to 25% of full fire by the
fan speed controller, to ensure proper operation of the
Brute Magnum. If a minimum desired output is higher
than 25%, the setting can be adjusted up by removing
the cover of the S350P control and adjusting the Min
Output dial (see Figure 14). Turning the dial clockwise
increases the minimum output. In most cases, this
setting should be left as shipped from the factory.
Figure 15. Control Parameter Graph.