TLV PowerTrap GP14-B Manuel D'utilisation page 35

Category
D.
1. The exhaust is
Faulty
abnormal
piping
2. The filling head is
insufficient
3. The pumped
medium inlet pipe is
too small
4. Not enough
pumped medium is
flowing through the
pumped medium
inlet valve
E.
1. Dirt or scale is
Faulty caught in the motive
PowerTrap
medium intake valve
or the valve is worn
2. Dirt or scale is
caught in the
exhaust valve or the
valve is worn.
3. The snap-action
unit is obstructed by
dirt or scale or its
operation is
otherwise faulty
4. The lever unit is
obstructed by dirt
or scale or its
operation is
otherwise faulty
5. The float is broken
Cause
- Air-locking or vapor-locking has occurred; in the case
of a closed system, the exhaust pipe is connected to
the reservoir, but the pumped medium may not be
exchanged for the medium inside the PowerTrap for
the following reasons:
(1) There is a U-shaped pipe between the exhaust port
and the reservoir
(2) The exhaust pipe has a diameter of less than
25 mm (1")
(3) There is no air vent for steam on top of the
reservoir or the steam equipment
If (1), (2), or (3): Change the pipe or install an air vent
(see page 12)
- The distance from the ground to the highest point on
the exhaust pipe is too great (over approx. 3 m [10 ft])
Add a steam trap to the exhaust pipe at a point just
above where the exhaust pipe exits the body of the
unit
- Normal pumped medium flow will not be obtained if
the filling head is smaller than that in the original
design;
the recommended filling head is 860 mm (34")
- Normal pumped medium flow may not be obtained if
the pumped medium inlet pipe is too small or the
valve on the pumped medium inlet pipe is a needle
valve or one with a small Cv value
- The pipe and stop valve size must be increased to the
design pipe size, and a full bore ball valve or gate
valve must be used
- The PowerTrap does not operate for long periods
of time, in spite of the fact that pumped medium
has collected in the receiver/reservoir; if there
is no sound at all of the operating medium flowing in
the motive medium intake valve and the exhaust
valve, it is possible that the PowerTrap is faulty.
Note, however, that this phenomenon will also occur
when the motive medium pressure is less than the
back pressure
- If the PowerTrap does not operate for long periods
of time and the sound of the operating medium can be
heard continuously in the motive medium supply pipe,
the PowerTrap is faulty.
Disassemble the PowerTrap, and inspect the following
items:
(1) Raise and lower the float and check to make sure
the snap-action unit operates properly
(2) Check the motive medium intake and exhaust
valves to make sure there is no dirt or scale caught
or any other abnormality
(3) Check other possible factors that might hinder
operation
After performing the above inspection, repair any
defects discovered or replace the PowerTrap
"Causes and Corrective Measures" is continued on the next page
— 33 —
Procedure