Reassembly; High-Pressure Safety Valve Adjustment Instructions - Daikin ECORICH EHU 40 Series Instruction Manual

13.7.3 Reassembly

After completing the cleaning, reassemble by following the removal procedure in reverse. The tightening
torque for the hexagonal bolts that secure the top plate and tank is 5.9 N⋅m. After completing reassembly,
check that the unit runs normally by following the test run instructions in "Chapter 10 TRIAL RUNNING".
 When using air blow, wear protective glasses to avoid getting deposits and dirt in your eyes.

13.8 High-pressure Safety Valve Adjustment Instructions

If any of the three conditions below is applicable, readjust the safety valve by referring to the [Safety
Valve Adjustment Instructions].
(1) Although the setting is such that even when used at the maximum pressure setting, the safety
valve will not actuate under normal pressure control (there is an exception during transition to the
main machine's hydraulic circuit blockage due to a stop of a hydraulic actuator, for example), the
set pressure of the safety valve drops and it actuates even in the normal status due to repeated
operation over a protracted period or contaminants in the hydraulic oil.
[Judgment method]
• When the oil temperature rise has become faster in comparison with how it was previously.
• When, in the pressure holding state with the motor speed displayed, turning the safety valve
adjusting screw in the tightening direction lowers the motor speed.
(2) When, for reasons such as the restricted withstand pressure of the hoses used, it is desired to as
far as possible suppress surge pressures that greatly exceed the set value.
(3) When the pressure setting has been changed after shipment from Daikin. For the purpose of
suppressing surge pressure in order to protect the main machine's actuator and peripheral
devices such as pressure gauges, it is advisable to set the safety valve setting to "unit set
pressure + 0.5 MPa".
PIM00504
WARNING
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