Operating instructions

Chapter 2
Programming
Instructions
Before using your Sentry, read all of this
chapter. Have your controller in front of
you so that you can try out the keys as you
read.
The Stop/Back Key
You can stop a firing at any time by
pressing
.
If you enter Options, you do not have to go through all
the prompts to get back out. Press to go to .
During programming, the
key will take
you back one programming step with each key press, so it is
easy to make corrections.
Correcting Entries
If you enter thewrong temperature, rate, etc.,while pro-
gramming, enter 0000. Then enter the correct numbers be-
fore pressing
.
Canceling a New Program
If you do not touch the keys for one minute during pro-
gramming, the controller will go back to the display.
Thecontrollerwillalsodiscardtheprogramyouwereen-
tering and will retain the previous program in memory.
This is useful if you change your mind during program
-
ming and decide to keep the previous program. Instead of
completing the new program, wait a minute and let the
controller return to .
Storing “User” Programs
To program the controller, must appear. From
press . will appear. The controller is ready
for you to choose a stored program or to enter a new one.
(See next page for program
-
ming instructions.)
The controller can hold 9
programs in memory. They
stay in memory even when the
power is turned off. Stored
programs are numbered 1
through 9. User program 1 can
have up to 20 segments. User
programs2-9canhave10seg
-
ments each. You don’t have to
use all the segments
available—use only the number needed. Often one seg
-
ment is all you will need.
When you program a firing, you will be asked to enter a
rate for each segment. Step 7, Programming Instructions,
next page, shows you how to zero out the segments you
don’t need.
When entering a program for the first time, press
after
appears. Your first firing will be stored as Program
1.
Each time you store another program, select the next
available number, such as 2, at the prompt. Select
-
ing a number for a new program over-writes (erases) any
program stored there. Write down your user programs for
quick reference. (Make copies of the blank form on page
26.)
Note: For repeat firings that you don’t want to inad
-
vertently change, see Program Lock, page 18.
Firing a Stored User Program
After you enter a new program and the display shows
, the new program is in memory and ready to fire.
Selectinga different stored program takes onlyseconds:
From press .
will appear. Enter the program number (1 -
9).
If there are no changes
to the program, press
twice. will
appear. The controller
is ready to fire your se-
lected program. To be-
gin firing, press
once.
Note: Use Program Re
-
view, page 9, before firing.
See also “Repeat Fir
-
ings,” page 9.
Rate
Each segment must include a rate, which is the firing
speed of that segment. We measure rate as degrees per
hour.Thisissimilartomilesperhour;justreplacemiles
with degrees. During programming, enter the rate when
appears. ( will also include the segment num
-
ber: etc.)
Thediagramonthenextpageshowsthreerates.Arate
of 1000° per hour will reach 1000° in 1 hour. A rate of 500°
willreach1000° in 2 hours.A rate of 333° will reach 1000°in
3hours.
If you want the furnace to fire at full speed, enter a rate
of 9999. See Programming Steps, step 3, next page.
7
When USER ap
-
pears, the con
-
troller is asking
you to select a
stored program.
If you have none
in memory, press
1andenteryour
first program.
Keep a record of
your stored pro-
grams and all
your firings.
Write down the
results of each
firing. This may
become invalu
-
able later.