Gilson HM-378 Operating Manual page 10

Gilson Company, Inc.
D. Fahrenheit or Centigrade: The controller operates
in Fahrenheit or Centigrade. In °C, a light appears in
the lower right of the display window. In °F, it disap-
pears. To switch from °F to °C or vice versa, from
IdLE, press the <°F/°C> key. CHG will be displayed.
Press the <ENTER> key again.
NOTE: All instructions in this manual are in °C.
Please ensure that the controller is in °C before
programming.
E. Delay Fire: The Delay Fire programs the furnace to
begin firing later. It zeros out after each completed
firing, so if you use this function for repeat firings, IT
MUST BE RESET EACH TIME.
F. Repeat Firings: To repeat the last firing of the
Ramp-Hold Program press <ENTER> from IdLE.
The furnace will begin firing.
WARNING!
First perform a Program Review to be sure that the
correct program is in place.
G. Program Review: Use this function to review pro-
gram settings for ignition tests or for the Ramp-Hold
program. From IdLE, press the <ENTER> key, then
the <PROGRAM REVIEW> key. Values for the last
program will scroll in order. A program in operation
can always be reviewed simply by pressing the
<PROGRAM REVIEW> key. To review a program
from memory, from IdLE press <PROGRAM>, enter
desired program number, and press <ENTER>. Then
press <STOP> and proceed as a normal program
review.
H. Power Failure: After a power failure during a firing,
the furnace will spend 10—15 seconds to perform a
self-test and then resume firing from its position in
the profile before the power failure.
I. Setting Alarm Before Firing Begins: An alarm can be
set to beep when a preset temperature is reached.
1. From "IdLE", press the <ALARM> key. ALAR will
appear alternating with the last alarm temperature
entered. A new temperature must be entered
within 10 seconds.
2. Key in the new alarm temperature. Then, press
the <ENTER> key. IdLE will appear. To remove
an alarm setting, key in 1820 (max. temperature)
as the alarm temperature.
When the alarm sounds during a firing, shut it off
by pressing <ANY> key except the <STOP> key. (If
it sounds as soon as the furnace begins firing, it is
because the alarm was set too low.)
J. Setting Alarm During Firing: After shutting off the
alarm during firing, it can be set to go off again later
at either a higher or lower temperature. To set the
alarm during a firing, perform these steps:
1. When the alarm beeps during furnace operation,
press the <ALARM> key.
2. Enter the new temperature.
3. Press the <ENTER> key. The alarm will sound
when the new point has been reached.
NOTE: If you press the <ALARM> key, enter a
new temperature, and forget to press <ENTER>,
the alarm value will revert to the previously stored
value. You must press the <ENTER> key after
entering the new alarm temperature.
K. Segment (For Ramp-Hold Program Only): The
furnace fires in segments, or stages. Each segment
has a firing rate, firing temperature, and hold time.
The Ramp-Hold program has up to four segments.
L. Firing Rate: The Firing Rate is measured in degrees
of temperature change per hour, from 1°— 9999°C
per hour (e.g., to increase temperature by 500°C
per hour, enter rate of 500). A rate of 9999°C will be
displayed as FULL.
M. Storing Programs: The HM-378 Controller allows the
user to store nine Asphalt Binder Ignition programs and
one custom Ramp-Hold program. To store an Asphalt
Binder Ignition program follow the HM-378 Control-
ler instructions in Section 7.2. When PRO appears
alternately with a value between 1 and 9 select the
number under which you wish to save this program.
After entering the number, press <ENTER>, then key
in the remaining desired values as prompted. When
the display reads IdLE, the program is automatically
saved.
To run the program immediately, press the <ENTER>
key until -ON- appears. To run the program at a later
time or after running another program, follow the in-
structions in Section 7.2. To save a custom Ramp-Hold
program follow the instructions in Section 8.1. Once
the program is entered, it is automatically saved until
it is overwritten with a new program—except for the
delay function, which must be reset with each use.
Page 10
Gilson Binder Ignition System: HM-378