Hansen AUTO-PURGER M Service Instructions Manual Download Page 6

Page: 6 / 16

APM-001e
AUG 2015

FEATURES OF THE APM

The purger can be set to one of several operating modes

to suit the requirement of the system. These include:

Automatic Operation, Manual Operation, New System Start-

up, and Purger Switched Off. The mode of operation can
be selected by repeatedly pushing the program advance
button on the front panel until desired purger mode light
is on. (See Figure 6).

AUTOMATIC OPERATION

The Automatic Operation mode is where the purger should

be set when normal levels of noncondensibles are in the
refrigeration system. The microprocessor-based electronics

of the APM uses its “logic” to locate noncondensibles
and spend more time purging those points. The purger
will energize the first enabled purge point solenoid (see
page 7, Purge Point Enable Switches). If after 10 minutes
noncondensible gases are not released, the purger then will
advance to the next enabled purge point. If noncondensibles
are released at any purge point within the first 10 minutes,
then the purger will continue to process gas and remain at
that purge point for increments of 10 minutes as long as
noncondensible gas is released during the 10 minute time
period. This “smart” feature will continue for a maximum
of 30 minutes. After 30 minutes, the purger will go on to
the next active purge point regardless if noncondensibles
are released. Once noncondensible gases have been
minimized, and enabled purge points cycle without releasing
noncondensibles, the purger will go into “Standby” mode
for two hours (the Standby purger status light will be on).

After two hours on Standby, the purger will then resume

operation to seek out noncondensible gases that may

have collected.

MANUAL OPERATION

Manual Operation mode allows the operator to select one
purge point continuously. This is usually the case if a
large volume of noncondensible gas is suspected to be at
a particular point. To select this mode, push the program
advance button until the Manual Operation purger mode
light is on. Then, push the purge point advance button to
select the purge point. In this mode, the purger will purge
this point only. However, noncondensibles must be present
for the purger to release gas from the purger. If not, the
purger will go into Standby mode.

NEW SYSTEM STARTUP

The New System Startup mode is to be used when the

refrigeration system is known to contain large amounts
of noncondensible gas. This may be due to new system
startup, extensive repairs to a system, or the presence of
an abnormal vacuum leak on the low side of the system.

The APM automatically sequences the purge point solenoid

valves for a fixed period of 10 minutes each to remove air
from each of the enabled purge points. The purger will
not go into Standby mode while in New System Startup
mode.

PURGER SWITCHED OFF

When the purger is in this position, all solenoid valves close
and the purger will pump out if the suction valve is open.

CONTROL CABINET (FRONT VIEW)

Figure 6

HANSEN TECHNOLOGIES

CORPORATION

PURGE

POINT

ADVANCE

PROGRAM

ADVANCE

PURGING