34
Cone-Fire / Ramp-Hold
Do not leave your kiln unattended during operation.
1
Unplug the kiln or disconnect the power. Remove
the 4 screws holding the controller faceplate to the
switch box. Gently remove the old controller.
2
Disconnect the wires from the old controller.
3
I f y o u r k i l n i s
top-loading and origi-
nally came with a
DTC 100 or 600, the
heat shield inside the
switch box may need
to be moved to give
more clearance for
the new Sentry con-
troller. Measure the
space between the
heat shield and the
front of the box. If the
space is less than 1
¾ ” ,
r e m o v e
t h e
screws that hold the
bottom of the heat shield. These screws are on the
sides near the louvers. Drill new holes in the switch
box next to the bottom 2 holes used for the heat
shield. Move the bottom of the heat shield back
and fasten screws in
the new holes.
4
Thread the Sentry
wiring harness into
the switch box by in-
serting it in the open-
ing where the control-
ler goes. Let the end
with the plugs hang
out of the box.
5
Remove the switch
box from the kiln by
removing the screws
holding the box to the
kiln.
6
The red wire from the
old controller con-
nects to the relay(s).
The red wire in the Sentry wiring harness goes to
the same relay terminal. (See diagram, facing
page.) You will notice that the red Sentry wire has
3 push-on connectors with jumper wires. If your
kiln has 3 relays, you will use all 3 push-on connec-
tors, 1 for each relay. If you have 2 relays, cut off
the last terminal and jumper wire. If your kiln has 1
relay, cut off two push-on connectors. Cut the wire
close to the terminal that remains (see next photo).
AppendixC:
Upgrading Instructions
Upgrading the DTC 100, 600, 800 & 1000 Series to the Sentry
CAUTION:
Cut off the
extra terminal(s) a nd
jumper wire(s) unless they
attach to relays. Uncon-
nected wires that touch a
grounded object can dam-
age your controller!
7
Attach the red wire ter-
minal(s) to the relay(s). Follow steps 6 and 7 for
the black wire, which also goes to the relays.
8
Note how the white, orange, and blue wires of the
old controller are connected to the transformer.
Removing and replacing one wire at a time, con-
nect the Sentry white, orange, and blue wires to the
transformer the same way. (See Transformers,
next page. Cut off the extra blue wire terminal if
your transformer doesn’t need it.)
9
Remove the old wiring harness from the switch
box. With the thermocouple wires and the Sentry
connection plugs hanging out of the front of the
switch box, move the box into place on the kiln. Ar-
range the wires so that when the switch box is fas-
tened to the kiln, the wires and wire nuts will not
touch an element connector or the kiln case. Install
the screws that hold the switch box to the kiln.
10
Straighten the
ends of the ther-
mocouple wires.
Attach them to
the thermocouple
terminals on the
bottom of the Sen-
try. (Use the cen-
ter connectors if
your kiln has only
one thermocou-
ple.) Make sure
the thermocouple
wires are tight.
11
Attach the two
plugs to the back
of the Sentry con-
troller. Carefully
insert the Sentry
into the controller
opening on the
switch box. Install
4 corner screws.
Tighten the thermocouple wires with a
small slotted screwdriver. To avoid dam-
aging the connection block, do not
over-tighten the screws.
The extra wires tied to the harness
are for multiple zone kilns and the
optional AOP electrical outlet. The
green grounding wire is connected
only if you use a computer interface.
Inserting the plugs on the back of the
Sentry.
