51
5. Hi-Limit Controller
The dryer utilizes six (6) channel controller (HLC-1) to monitor various locations on the dryer for over
temperature faults. The hi-limit controller enables the dryer to continually monitor up to six (6) Resistive
Temperature Devices (RTD's) at one time. Each channel is individual with set points. The hi-limit controller
scans each channel, and in the event of an alarm, the scanning will halt (stop), and the Single-Pole-Double-
Throw (SPDT) will change states signaling a fault. The hi-limit controller will remain in alarm until the reset
button is pushed and the temperature has fallen below the set-point temperature. The scan rate can be
adjusted from 4 to 12-seconds per channel.
• Channel #1 is used to monitor the exhaust for an over temperature situation.
• Channel #2 is used as an over burner monitor (for Gas Models Only).
• Channel #3 is used to monitor intake temperature (for Gas Models Only).
• The remaining channels are spares that can be used for future expansion.
a. Hi-Limit Controller Replacement
1) Discontinue electrical service to the dryer.
4) Disconnect the plug going to the hi-limit controller.
5) Remove the two (2) screws holding the mounting slides.
6) Remove the two (2) slides.
7) To install new hi-limit controller, reverse Step #6 thru Step #2.
8) Reestablish electrical service to the dryer.
2) Loosen the four (4) screws hold the hi-limit mounting
bracket.
3) Slide the mounting bracket off of the screws through the
keyhole.
H
I
-L
IMIT
C
ONTROLLER
T
EMPERATURE
S
PECIFICATIONS
G
AS
S
TEAM
ºF ºC
H
I
-L
IMIT
N
AME
ºF ºC
H
I
-L
IMIT
N
AME
RTD 1 225 107 Exhaust Temp. Limit 225 107 Exhaust Temp. Limit
RTD 2 200 93 Over Burner Temp. 650 343 Intake Temperature
RTD 3 650 343 Intake Temperature 500 260
N/A*
RTD 4 50 0 26 0
N/A*
500 260
N/A*
RTD 5 50 0 26 0
N/A*
500 260
N/A*
RTD 6 50 0 26 0 N/A* 50 0 26 0
N/A*
* Not applicable...controller channels must be set to 500º F (260 ºC).
Current
Production
Past
Production
To Next Page
Loading...
