Titus Pneumatic Controls IOM - Manual (Page 9)

PNEU-IOM-9.0 5-2-05
Guide to Service Procedures
Actuator will not stroke. (Generally any setting of
the damper compatibility selector on the face of
the controller). 1. Repair the leak.
2. Apply 15-25 PSI air from the main air supply
to the actuator. The actuator should stroke.
Pinch the air supply line. If the actuator retracts,
it is leaking. Replace the actuator and contact
your TITUS distributor.
3. The controller must receive compressed air
from the main supply at 15-25 PSI. Be sure all
connections are as shown in Figure 9.
4. If the controller appears to be faulty, contact
your Titus distributor.
5. See Figure 9. The Thermostat must be
connected to Port T and the main air to Port M.
6. See Figure 9. Make the connections as
shown.
1. Leak in the control line between the controller
and the actuator.
2. Leak in the actuator.
3. Insufficient main air supply pressure.
4. Faulty controller.
5. Pneumatic thermostat and main air line
connections are reversed at the controller.
6. Control lines from the sensor to the controller
are reversed.
Actuator will not stroke. (Normally open setting
of the damper compatibility selector on the face
of the controller.) 1-6 as above.
7. Replace the caps on the balancing tees.
8. Clean out the passage or control line
9. Set the damper compatibility selector to
match the action of the damper.
10. Increase the air flow rate to the terminal inlet
if necessary.
1-6 as above.
7. Rubber caps on HI or both balancing tees are
missing.
8. HI control line or the HI passage of the sensor
is plugged.
9. Damper compatibility selector on the face of
the controller is set wrong.
10. Low differential pressure at the sensor.
Actuator will not stroke. (Normally closed setting
of the damper compatibility selector on the face
of the controller). 1-6. As above.
7. Replace the cap
8. Clean out the passage or control line.
1-6 as above.
7. Rubber cap on the LO balancing tee is
missing.
8. LO control line or the LO passage in the
sensor is plugged.
Actuator remains fully stroked at all times.
(Normally open setting of the damper
compatibility selector on the face of the
controller). 1. If the controller appears to be faulty, contact
your Titus products distributor.
2. Replace the cap.
3. Clean out the passage or control line.
1. Faulty controller.
2. Rubber cap on the LO balancing tee is
missing.
3. LO control line or the LO passage of the
sensor is plugged.
Actuator remains fully stroked at all times.
(Normally closed setting of the damper
compatibility selector on the face of the
controller). 1. If the controller appears to be faulty, contact
your Titus products distributor.
2. See Figure 9. Make the connections as
shown.
3. Replace the caps on the balancing tees.
4. Clean out the passage or control line.
5. Set the damper compatibility selector to
match the action of the damper.
6. Increase the air flow rate to the terminal inlet
if necessary.
1. Faulty controller.
2. Control lines from the sensor to the controller
are reversed.
3. Rubber caps on HI or both balancing tees are
missing.
4. HI control line or the HI passage of the sensor
is plugged.
5. Damper compatibility selector on the face of
the controller is set wrong.
6. Low differential pressure at the sensor.
Inaccurate or erratic air flow control. 1. Check inlet duct for blockage or kinks.
2. Repair the leakage.
3. Control must be horizontal ± 10 degrees.
4. See “Adjusting the Minimum and Maximum
Air flow”.
5. Increase the air flow rate to the terminal inlet
if necessary.
6. Set the thermostat compatibility selector to
match the action of the thermostat.
7. Turn the thermostat adjusting dial through its
full travel. The air pressure signal delivered by
the thermostat to Port T on the back of the
controller must vary from 0 to main air supply
pressure (15-25 PSI). If this pressure range is
not correct, recalibrate the thermostat or consult
your Titus products distributor.
1. Poor inlet duct connection.
2. Leakage in the duct work.
3. Assembly mounted in a non-level position or
upside down.
4. Controller adjustment dials are not set
correctly.
5. Low velocity pressure in the inlet duct.
6. Thermostat compatibility selector on the face
of the controller is set wrong.
7. Thermostat is out of calibration.