Operator`s manual

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2. The air exchange fan produces about 20CFM of flow when operated at full speed. The vent hood or system being
used for the furnace should have sufficient capacity to accommodate this airflow.
3. The air exchange operation may be controlled for 10 different settings, ranging from 0 to 9 (off to full on). The
maximum setting of 9 on the control performs approximate 5 air exchanges per minute. The curves shown on
page 13 show approximate air changes vs. fan setting.
Example: Stage 1 of program 5 can be programmed to a fan setting of 9 while stage 2 of program 5 can be
programmed to a fan setting of 3 and stage 3 of program 5 to a fan setting of 0 (off).
4. The air control settings are retained in memory for each program even when the power is removed.
5. The air control settings are programmed into memory the same way as other parameters. Change to the program
number of interest, press the key: once for stage 1, twice for stage 2 and three times for stage 3. The
display shows the current fan level and a new level may be programmed.
A fan speed setting is changed and stored by pressing a digit key (0-9) followed by the ENTER key. A fan setting
change made while a program is operating (running) is only used during that cycle and is not saved in permanent
memory.
The higher the air control setting the slower the furnace will heat. High air control settings with low line voltages
may prevent the furnace from reaching the maximum temperature.
PROGRAM 0
Program 0 is a single temperature hold program. The furnace will heat to this temperature and maintain it as
long as power is applied.
1. Press the 0 key. The display shows the current programmed temperature and the 0 program number.
2. For example: T0 100°C -> _ _ _ _
3. Use the digit keys (0,1,2,...9) to enter the desired temperature followed by the ENTER key. The
new parameter is now stored in memory. The display shows: 100°C ***** 0 where 100 is the current
muffle temperature, 0 the program number, and ***** indicates that the program is not running.
4. Pressing the Start
S
key causes the furnace to heat at full power to the programmed temperature.
The display shows "xxxx°C *Hold* 0" "xxxx" is the current muffle temperature, the word "Hold" indicates
single stage operation and 0 indicates the program number. The T1 LED will also be on.
SPECIAL FEATURES
DELAY START (D)
The Delay Start function automatically starts a program so that it is completed at a selected time up to 7 days later.
The delay is programmed in terms of delay days and completion time. A clock is used to keep track of time as long
as the power switch is on. If a power outage should occur during a "Delay Start", the completion time will be delayed
by the length of time the power was off (the clock stopped running).
Programming The Delay Start:
1. Pressing the Delay Start
D
key shows the time of day and beep.
• For example: Now=7:30->_ _:_ _
• The corresponding LED will also light to indicate the Delay Start is selected.
2. Use the digit keys (0,1,2,...,9) to enter the current time of day followed by the ENTER key. The new
parameter is now stored in memory. The time of day is entered as a 24 hour clock (11:34PM is 23:34), (8:10AM
is 08:10).
• Programming the current clock time "Now = 7:30 -> _ _:_ _" is only displayed and requested if there has been
a power outage since the last time the Delay Start was operated. Turning the power switch off stops the clock.
3. Pressing the Delay Start
D
key again shows the Delay D parameter in days.
• For example: Day: 1 [1,2,...,7]
• The corresponding LED will also light to indicate the Delay Start is selected.
4. Use the digit keys (0,1,2,...,7) to enter the desired number of delay days followed by the ENTER key. The
new parameter is now stored in memory.
• If a value is entered that is greater than 7, the furnace will display and use 7.
5. Pressing the Delay Start
D
key again displays the desired program completion time. The furnace will calculate
the approximate time that the program needs to start so that it is completed at this programmed time.
A