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Appendix D
–
Using the Model 118 ITM in the European Community
26
9.2. Fuses
There are two types of fuses used in the unit. Neither fuse is operator replaceable.
30 A fuse 0.25 in. x 1.25 in. Type F, two per unit
1 A fuse 5mm x 20mm Slow Blow, one per unit
The 30 A fuses monitors the Fan Current (30 Amp fuse required for UL 20 Amp FANS
requirement). If one of the fuses fully opens, properly trained maintenance personnel must
determine the cause of the problem and, with the power turned OFF to the Model 118 ITM,
change the fuse. These fuses are located at the rear of the unit (see Figure 14) and are only
accessible by the use of a tool to gain access to the fuses.
The 1 A fuse monitors the current going into the Model 118 ITM electronic section. It is
located at the rear of the unit, please see Figure 14. In order to access the fuse you’ll need
to use a flathead screw driver, insert the screw driver into the slot and turn counterclockwise
to open the fuse housing for replacement. The 1 A fuse will only open if there has been a
failure inside the Model 118 ITM. If the 1 A fuse opens, the Model 118 ITM must be removed
from service and returned to the factory for repair.
Figure 14 – Fuse location
11
10
9
8
7
TRIP
6
5
4
3
ALARM
2
1
12
13
14
15
RELAY 4
RELAY 5
EARTH
GROUND
VACC NEUT.
INPUT (-)
VAC LINE
INPUT (+)
8
7
6
L
N
FANS #2
5
4
2
3
1
TB2
FANS #1
L
N
FAN #1
INPUT POWER
TB1
1
2
3
4
5
1
2
3
4
5
6
1
2
RXD+(B)
RXD-(A)
TXD+(B)
TXD-(A)
ISO GND
YEL +
LEFT
RED
YEL +
CENTER
RED
YEL +
RIGHT
RED
TB4
TB3
TB5
MADE IN USA
TB1
TB2
FAN #2
INPUT POWER
TYPE K
THERMOCOUPLE
UNIVERSAL INPUT
POWER
80 - 300 VAC
48 - 280 VDC
FUSE: 1A
POWER: <10 WATTS
MODEL NO.
MFG. DATE
SERIAL NO.
REPLACE FUSES
WITH THOSE OF
THE SAME
RATING.
+
-
FOR 20A CONTINUOUS DUTY CIRCUITt,
USE 30A FUSES
1A Fuse
30A Fuse
30A Fuse
