2-6 Instruction for the Boiler When It is not used for a Long Time
Most people cares a lot for corrosion protection of the boiler during operation, but cares nothing for the boilers which
is not used for a long time. In case that the boiler is not used for a week, the boiler could be corroded unexpectedly
due to wrong preservation.
The boiler preservation methods are as follows:
Boiler banking method by fulfilling water: injects the chemical to the boiler water to remove the
dissolved oxygen for maintaining the PH of the water as. PH 11.0 - 11.8.
Boiler banking method by drying : stores the boiler in the dry condition for freezing prevention in winter time.
Chapter 3 Manipulation of Auxiliary Equipment
3-1 Manipulation Method
(1) Setting Method for the Thermal Relay(OCR) of the Magnetic Switch
If the motor for blower, feed water pump or oil pump is
overloaded due to any reason, the thermal relay(overload
protection device) is working and then shut off the
magnetic switch to stop the motor for protection of it.
When the thermal relay is working, the lamp indicating
overcurrent is lit up, warning alarm is buzzing and reset
lever of the thermal relay is raised up about 2mm.
Pushing the reset lever after checking and corrective action
(Thermal relay of the magnetic switch)
for motor, it will be reoperated
(2) Adjusting Method for the Pressure Switch
It is able to adjust the pressure range of 4 -9 Kg/cm2
(below maximum pressure). The pressure of the pressure
switch is adjusted by using the pressure adjusting bolt
and the pressure variation adjusting bolt to control
“ON - OFF” for combustion.
* Example of Pressure Adjusting :
In order to perform combustion as the figure
in the right side:
1) Set the pressure adjusting bolt of the high pressure switch to 8 Kg/cm2.
2) Set the pressure variation adjusting bolt of the high pressure switch to 3Kg/cm2.
3) Set the pressure adjusting bolt of the low pressure switch to 6 Kg/cm2.
4) Set the pressure variation adjusting bolt of the low pressure switch to 1 Kg/cm2.
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