Circuit Board Fuse; Thermocouple; Tnf Ii Thermocouple; Controller Board - Paragon DTC 1000 Operation & Maintenance Instructions Manual

Replacing Switch Box Components
Important When Re-
placing Components: If
a push-on terminal is
loose, gently squeeze
with pliers. Connections
must be tight!
Replacing Circuit
Board Fuse
The fuse holder is near the bottom of the switch box. Re-
move fuse by pressing on the fuse holder and turning coun-
ter-clockwise half a turn.
Replacement fuse: AGC ½ A 250V AC
WARNING: Replacing the fuse with one of a higher amper-
age will void your warranty.
Thermocouple Replacement
If your thermocouple needs replacing often, it may be due
to sulphur in the clay you are firing. Sulphur makes the ther-
mocouple sheath brittle so that if nudged during loading, it
breaks.
TnF II: see next column.
1 UNPLUG kiln.
2 Remove screws on the sides
of the switch box that hold it
to the kiln, and let switch
box hang by element-to-re-
lay lead wires.
3 To prevent the thermocou-
ple from touching anything
metallic, it is held in place
with a porcelain insulator.
Remove the screw from the
thermocouple fastener,
which holds the porcelain
insulator in place. Pull ther-
mocouple from its firebrick
hole.
4 Insert the new thermocouple into the firebrick hole so
that it protrudes into the firing chamber
mark on the thermocouple 1" past the outside firebrick
wall surface.
5 Remove the thermocouple. Slide the porcelain insula-
tor, wide end first, onto the thermocouple as far as it
will go. Gently bend the thermocouple at the mark with
your hands. Do not use pliers, or the thermocouple
may kink.
6 Slide the thermocouple back into the hole. Position the
thermocouple fastener so that it holds the porcelain in-
sulator against the heat shield. Install the screw.
7 Position the thermocouple lead wires so they are away
from the hot sides of the kiln case and electrical wiring.
(Thermocouple wires next to or looped around other
wires may cause erratic controller readings.) Do not al-
TnF 2 Thermocouple Replacement
Controller Board Replacement
Transformer Replacement
" - ". Place a
1 5
2 8
low the thermocouple, including its spring, to touch
anything metallic, such as a heat shield.
8 Check to see that no wires are touching the kiln case or
the element connectors. Wires touching element con-
nectors or kiln case will burn out. Install switch box.
1 UNPLUG. Remove TnF 2 controller faceplate.
2 Remove the thermocouple leads from connectors 10 &
11 (diagram page 22). Pull the thermocouple wire from
the box.
3 Thread the end of the new thermocouple lead wire into
its hole in the TnF 2 box.
4 Connect the new wire to connectors 10 & 11. Fasten
faceplate to the front panel. See "Thermocouple Re-
placement," left column, to install the thermocouple
onto the kiln. The thermocouple must not touch any-
thing metallic.
1 UNPLUG kiln.
2 Remove the 4 corner screws
holding the controller face-
plate to the switch box.
Carefully lift out faceplate.
3 Disconnect all wires from
the back of the board.
4 Connect the wires to the new
board following the diagram
on page 22. Reinstall faceplate.
WARNING! Be careful to attach the wires to the correct
terminals. Reversing wires on the board can burn out
switch box components and the transformer. Damage
from miswiring is not covered by warranty!
1 UNPLUG kiln. Remove the screws that hold the switch
box to the kiln, and let switch box hang by ele-
ment-to-relay lead wires. (TnF II: Remove the front
panel from the TnF II.)
2 Remove and transfer one wire at a time from the old
transformer to the new one. Make sure each connec-
tion is tight.
3 Unbolt transformer from switch box. Examine new
transformer to make sure the primary is properly wired
for your kiln's voltage. (Refer to your kiln's wiring dia-
gram.) Make sure push-on connectors do not touch
each other.
4 Bolt new transformer into switch box. Check to see that
wires are not touching kiln case or the element con-
nectors. Wires touching element connectors or the
kiln case will burn out. Move switch box into place and
reinstall switch box screws.
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