USER'S AND
MAINTENANCE
MANUAL
Date:
01/31/2020
Code
MAN D185T4F-DB
ENG
Air Compressor : D185T4F-DB
Revision 03
Copyright © 2014, ROTAIR S.P.A. - All rights reserved
.
This manual is intellectual property of ROTAIR S.P.A.
Its full or partial reproduction is forbidden under any form, on any support and by any means, without the
written authorization by ROTAIR S.P.A.
Page
40/59
11.2 Monitoring and control of the air pressure of the compressor
Figure 11.2-1 Adjusting maximum pressure
of the air compressor
The maximum pneumatic pressure is calibrated during the testing phase of the machine. If the value of the
maximum
air
pressure indicated by the pressure gauge on the control panel
has changed more than
± 5% from
the value specified in
Specification Section
2 of this manual, proceed as follows:
1)
Start the machine as described in Section 10.2 “Starting”
2)
Wait for the compressor to reach maximum pressure when the engine is at idle speed
3)
Close all air valves (Figure 10.2-1)
4)
Open the hood with the engine running and loosen the 22mm lock nut (
Letter A in
Figure 11.2-1) on
the maximum pressure valve
5)
To increase the maximum pressure, tighten the 19 mm nut (Letter B in Figure 11.2-1)
6)
To reduce the maximum pressure, loosen the 19 mm nut (Letter B in Figure 11.2-1)
7)
Tighten the lock nut when the appropriate pressure is obtained (Letter A in Figure 11.2-1)
8)
Slightly open the air valve until the engine accelerates, then close the air valve. Repeat this 2-3 times
to allow the settling of the pressure valve.
9)
Check the reading on the pressure gauge located in the control panel to insure that the maximum
pressure has been obtained
10)
Compare the measured pressure with the specification in Section 2.2 and repeat Steps 5-10 if needed
to obtain the correct maximum pressure max. 8.5bar
/
123psi.
11)
Close the hood
WARNING:
Notice that the gauge needle should move smoothly; if it doesn't, replace it.
Before making any calibration to the high or low pressure, make sure that the
gauge is working correctly and reliably.
A
B