Magnum Venus Plastech CFH-2000 - Manual (Page 23)

CFH -2000 Series Heater Manual
Rev. 01/2013 Page | 23
CFH-2000-AI Air Interlock units:
7. Air Switch: Disconnect wires and check microswitch to ensure continuity through
normally closed contacts when air supply is off.
If there is no continuity, inspect air actuator to insure it is disengaging. If air actuator
disengages properly, switch is faulty and must be replaced. Next apply air pressure (at
least 30 psi) to air actuator.
Check continuity through normally open contacts. If none, check actuator to insure it is
engaging switch. If not, a small amount of oil may free actuating cylinder or it may be
adjusted if not engaging far enough. If actuator is engaging switch properly but there is
no continuity through normally open contacts, switch is faulty and must be replaced.
8. Preheat Air Valve / Button: Check that the air valve has a constant air supply, 20psi
minimum. Disconnect the outlet air line and make sure that an air signal is sent when
the button is pushed. If no signal air is sent when the button is pushed, check the valve
for blockages and replace as necessary.
Material Flow Blockage and Leakage Problems:
1. If heater is completely blocked, the end caps should be removed and resin passages
thoroughly cleaned. Make sure the passages in the end caps are clean as well.
Fittings into and out of heater should also be cleaned.
2. In case of leakage, check that perimeter end cap bolts are correctly tightened at 60
ft/lb. If so, remove end caps and inspect O-rings, Clean O-ring groove thoroughly.
Note: Brush anti seize on the Tie Rods to fill the threads, Torque the nuts to
60ft/lbs.