SECTION 3
OPERATION
45
3.7 Boiler Pressure Control Function (Option)
The controller allows this function to operate when an optional pressure sensor is installed on the MI
Terminal MT1-200 of each boiler.
a) Boiler pressure control under manual operation
(*)
The controller controls the boiler combustion in accordance with the control pressure separately
set when the MI Terminal MT1-200 is under the manual operation
(*)
mode.
When the boiler is set to the manual operation
(*)
mode, operation is changed automatically so
that it operates at a control pressure set with the MT1-200.
P.25
b) Pressure
holding
By setting a holding pressure to the MI Terminal MT1-200, the boilers can perform combustion up
to a certain pressure even though the boilers are under standby state during automatic
operation
(*)
. (The pressure to hold the pressure constant is referred to as holding pressure.)
This function is effective in case of sudden fluctuations in load since the boilers under standby
can always keep pressure above a certain level.
P.27
Содержание MP1-200
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