DH Instruments 402102 Hoja de instrucciones - Página 2
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Imprimir páginaINSTALLATION OF RESERVOIR
Close valve: Close the reservoir FILL/DRAIN valve.
Install adaptor: Install the 1/8 in. NPTM x 1/4 in.
Swage
adaptor
in
RESERVOIR RETURN bulkhead fitting.
Connect tubes: Connect a tube from the PPCH
EXTERNAL RESERVOIR RETURN port, to the
return port (1) on the external reservoir.
Connect tubes: Connect a tube from the PPCH
FILL/DRAIN port to the supply port (2) on the
external reservoir. The stainless steel Swage fittings
are used at the PPCH FILL/DRAIN port connection.
Fill external reservoir: Fill the external reservoir
through the 1/2 in. Swage brass fitting (4) with the
same fluid as is used in the PPCH. Do not fill past
the top of the stainless steel return tube.
The MAX FILL label on the rear of the PPCH does
not apply when using an external reservoir.
The top of the return tube defines the fluid head
applied to the PPCH's Q-RPT when in a VENT
condition.
Enable
reservoir
RESERVOIR RETURN valve to the EXTERNAL
position, and loosen the vent plug on top of the
Reservoir – this is a 10-32 x 1/8 threaded plug.
Document 560072
DH Instruments, Inc.
4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA
the
PPCH
EXTERNAL
return:
Turn
the
PPCH
Be sure the external reservoir is open to
atmosphere so proper system venting and
zeroing can occur.
Purge overflow circuit: Purge air from the
internal reservoir and the overflow circuit:
•
Prepare the 1/8 in. NPT plug (that was
previously used in the external reservoir return
bulkhead)
for
use
bulkhead fitting by wrapping the NPT threads
with Teflon tape.
•
Slowly turn the FILL/DRAIN valve to the
OPEN position.
•
Plug the OVERFLOW bulkhead port when
gas-free oil begins to flow out.
Fill the reservoir return tube: Finish the purge
process by running the [PRIME] function on the
PPCH to cycle fluid from the reservoir supply,
through the PPCH, and back out to the External
Return tube. First ensure the TEST port is plugged.
When the PPCH is vented, the system connected
to the TEST port is also connected to the
External Reservoir (which is higher than the TEST
port). If there is an open point in the system
below the fluid level in the reservoir, fluid will run
out of the system at this open point.
in
the
OVERFLOW
050412
Tel 602.431.9100
Fax 602.431.9559
www.dhinstruments.com