I.C.E. 3 OSDs - Manual (Page 12)

11
TYPICAL SEQUENCE OF OPERATION
(WARNING: FOR ACTUAL UNIT SEQUENCE OF OPERATION, PLEASE CONSULT SHOP DRAWINGS)
OSD SPRAY/DRY UNIT SEQUENCE OF OPERATION
PB1000 REMOTE PANEL c/w PROGRAMMABLE LOGIC CONTROLLER (PLC)
Spray Mode
1. Lighting Contactors are always energized as long as main disconnect is on and Booth Lights Switch is in “ON”
position. Spray Gun Solenoid (by others) is energized only in Spray Cycle.
2. System “ON” Push Button is pressed and released the fresh air dampers open fully (100%) and the return air
dampers close fully (0%). When the fresh air damper end switch makes the exhaust fan motor starter is energized.
3. After a delay (adjustable from PICO Controller) the Supply Fan Motor Starter is energized.
4. Once the supply fan air proving switch has made both the Spray Cycle Light and Supply Fan Light are energized.
5. Burner is controlled by Burner Switch located on Remote Panel.
Dry Mode
Note: A set of normally closed contacts from a fire alarm are placed in series with PLC Input No. 4 so that in the event
of a fire the Dry Cycle is shut down and the system reverts back to the Spray Cycle venting smoke to the outdoors
through the unit.
1. Dry Mode Push Button is pressed and released. Spray Cycle Light is de-energized and Spray Gun Solenoid (by
others) is de-energized. Burner is still active (if burner switch is “ON”) discharging at Remote Temperature Selector
Set Point.
2. Purge Cycle Timer (set to 180 seconds, adjustable from PICO Controller inside Remote Panel) is energized while
simultaneously energizing the Purge Cycle Light.
3. After 180 seconds, the Purge Cycle Light is de-energized. The Dry Timer (set to paint specifications, adjustable
from PICO Controller inside Remote Panel) is energized which will energize the override temperature set point on
the Potentiometer located on the back of the Remote Panel Mounted Remote Temperature Selector, and the Dry
Cycle Light.
4. The fresh air damper repositions for 20% fresh air and the return air damper repositions for 80% return air.
5. On expiration of the paint specification dry time, the override temperature set point on the Potentiometer and the Dry
Cycle Light are de-energized.
Cool Down Mode
1. The Cool Down Timer (adjustable from the PICO Controller inside Remote Panel) is energized while simultaneously
energizing the Cool Down Cycle Light.
2. The dampers reposition for 100% fresh air and 0% return air.
3. The burner (if Burner Switch is in “ON” Position) will discharge temperature as set at the Maxitrol spray mode set
point.
4. After the Cool Down Timer times out the system will shut down.
Timer Settings (Operator Programmable)
TD-1 Delay Exhaust Timer, Set 3 seconds (in PICO Controller)
TD-2 Booth Door Delay Timer 5-30 seconds (in PICO Controller, set 15 seconds)
TD-3 Purge Cycle Timer Set 3 minutes (in PICO Controller)
TD-4 Dry Cycle Timer set as per Paint Specifications (in PICO Controller)
TD-5 Cool-Down Cycle Timer Set 3 minutes (in PICO Controller)
Additional Notes
1. In spray mode if any of the booth doors are opened the spray gun solenoid valve will be de-energized after the door
delay timer has timed out (Operator Programmable in PICO Controller, 5-30 seconds).
2. In the dry mode if any of the booth doors are opened the unit will shut down after the door delay timer has timed out
(Operator Programmable in PICO Controller, 5-30 seconds).