PAGE 44 of 79 VULCAIN OIL-FIRED HEATER
LAST UPDATED: JAN 22-2019 COPYRIGHT © SAMUEL JACKSON, INCORPORATED 2018 ALL RIGHTS RESERVED
Analog Fuse Replacement
Your Vulcain Heater is equipped with 32 mA fast blow fuses on analog 4-20 mA DC
inputs to prevent damage to the input cards in the event that the analog sensors are wired
incorrectly. In the event that a fuse is burned out, two spares are provided.
To replace a fuse, do the following:
□
Make sure the Thermocouple or other analog transmitter device is wired correctly
using the correct hookup wire.
□
Type J thermocouple wire cannot be used to connect the 4-20mA transmitter type
thermocouples to the unit.
□
Pull the top tab. The fuse holder will rotate out.
□
The fuse is secured on the right side of the fuse holder. Pry it out using a small
screwdriver or similar instrument.
□
Press the new fuse into position.
□
Close the fuse holder.
If the fuse continues to burn out, check to see that there are no shorts in the wiring and
that the thermocouples are not wired backwards. If needed, contact the factory to order
more fuses (Part No. 22285A).
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