PTM PMO1450, Assembly Manual

Page: 26 / 36

Montageanleitung / Assembly guide
Seite 26 von 36
B. COMMISSIONING
B.1 Compressed air connection
The function and the service life largely depend on the quality and pressure of the compressed air supplied.
Excessive moisture or dirt particles damage the motor. A high proportion of condensate in the compressed air
causes rust to form in the motor and the silencer freezes up when the air expands.
The following points are to be observed when using the compressed air motor:

For the supply and exhaust air to/from the motor, use the right air hose (see table)
PMO450 PMO900 PMO1450 PMO1800 PMO3600
Air supply diameter 6mm Air supply diameter 8mm
Air exhaust diameter 8mm
(at continuous operation in one direction of rotation) Air exhaust diameter 10mm
(at continuous operation in one direction of
rotation)
Reduce to smaller diameter required i
mmediately before the motor’s compressed air connections.
Various adapter versions are available as accessories for this purpose.

The M5 vent hole for the overpressure generated inside the compressed air motor must never be sealed
off. Use a vent hose with an inside diameter of 3 mm.

Main air lines require a slight gradient of at least 1% in the direction of flow to allow condensate to drain
at the lowest position through a valve (manual or automatic).

For a horizontal main line, connect the branches from above. For a vertical main line, do not connect at
the lowest position. That will prevent condensate present in the main line from flowing into the branch.

Use maintenance units with an air filter of min. < 5µ filtration degree. Install the maintenance unit with a
minimum ¼" threaded air connection in the vicinity of the motor.

When used under water it is essential to observe correct dried
,
cooled compressed air to avoid the formation of
condensate .

The air filter requires regular maintenance during which the stored condensate must be drained and the
filter cleaned.

The compressed air motor achieves its optimum performance at 6 bar (85 psi). If the pressure in the
compressed air network exceeds 6 bar, a pressure regulator must be used.

The required number of revolutions can be set using the pressure regulator or a supply or exhaust air
throttle. The supply air throttle is preferred over the exhaust air throttle as less wear occurs.

A speed of over 300 rpm and hence damage to the motor must be prevented at all costs, both without
load and under load.
B.2 Repairs
If the compressed air motor does not achieve the required output, check the following points:
g) Is the air pressure adequate (6 bar / 85 psi)?
h) Is the air pressure constant or does it fluctuate?
i)
Is the required air quantity available?
j) Is the air filter in the maintenance unit clean?
k) Are there any leak losses between the maintenance unit and compressed air motor?
l) Are there cross-sectional constrictions in the exhaust air line?
If none of these faults is present, the motor must be returned to the manufacturer for inspection.
Please have all repairs carried out by the manufacturer. The seals must not be damaged.