CONFIDENTIAL - This document is the property of K.T.C. S.r.l. and cannot be reproduced or issued to third parties without written
authorization. K.T.C. shall safeguard its rights to the full extent of the law.
OPERATION AND INSTALLATION MANUAL
COD. 091003 - KME 18-22-30-37 - REV. 07 - DATA 11/2016
pag.25 of 68
5.7.4
INFORMATION ON THERMAL RELAY CALIBRATION
CAUTION!!
Turn off power to the compressor before performing any work on the electric box. To
ensure that the compressor will operate properly at full continuous load at maximum
working pressure, make certain that the room temperature does not 45°C.
Make certain that the compressor working temperature remains below the set cut-off
value - SEE PARAMETER ON ELECTRICAL CONTROLLER (T. MAX).
Check the air/oil exchanger and keep it clean.
For problems related to high environmental temperature, we recommend using special
oils rated for high temperatures and contact an Authorized Service Centre to solve the
problem.
Adjustment of thermal relay
FR1
mu
s
t reflect the values indicated in the table below; if the thermal
relay trips, check absorption and voltage at the line terminals during operation and check the power
connections inside the electrical panel and on the motor terminals. The thermal relay
FR1
is set as
indicated in the table below:
- For models with STAR/DELTA start-up:
Power kW
Rated voltage 380/415V-3ph
Rated voltage 220/240V-3ph
18.5
21 A
37 A
22
25 A
44 A
30
35 A
59 A
37
42 A
72 A