11
Leak Testing Procedure
Caution
: DO NOT use this procedure if chiller pressure is lower than 15” Hg.
Otherwise, the rupture disk may implode into the chiller!
1.
Remove pipe plug (or optional Rupture Alarm™ if used) from alarm port
(35)
of Connector
(14)
.
2.
Utilizing a 1/8” NPT x 1/4” Flair half union, connect a refrigeration manifold set (low side hose) to the
alarm port
(35)
of Cross Connector
(14)
.
3.
Carefully raise the pressure level to
NO MORE THAN 5 PSI MAXIMUM,
and test for leaks using
standard leak testing procedures.
Warning:
During testing, to maintain pressure at such a low psi, you may have to
remove the filter/vent
(34)
and hold your finger over the outlet of the Double Check
Pressure Equalizing Valve. DO NOT install a plug in outlet of the Double Check
Pressure Equalizing Valve. Failure to remove plug after leak test could create a serious
safety hazard.
4.
At conclusion of Leak test procedure, release pressure and remove hose and fitting. Reconnect
alarm tube or re-install pipe plug in alarm port
(35)
and secure tightly.
Annual Maintenance
Warning:
DO NOT TAMPER WITH WIRE AND LEAD SEAL DURING SERVICING!
Removal of wire and lead seal will compromise pressure relief calibration and void the
warranty. If service to the valve assembly effecting calibration is required, it must be
returned to manufacturer for service. ANNUAL SERVICING DOES NOT AFFECT
CALIBRATION.
1.
BEFORE SERVICING THE VALVE
, pull up pull ring
(25)
and insert a pin in 2nd hole
(17)
of
tension bar
(26)
. This will protect the valve seat O-Ring and keep the valve body from popping up
when valve body locking screws are removed.
2.
After pinning the spring tension bar, break vent pipe union
(12)
(see Figure 2 on page 8).
3.
Next, remove the five (5) valve body locking screws
(9)
, and lift valve body
(7)
from the valve
nozzle
(32)
.
4.
Inspect valve seat O-Ring
(1)
and valve body O-Ring
(2)
. If there are any visible signs of wear or
excessive compression set, replace the O-Rings. Lightly oil the valve seat O-Ring to facilitate
installation into the dove-tail O-Ring grove.
O-Ring type & sizes are:
Valve seat O-Ring
(1)
is a
Parker - #2-146-V747-70
Valve body O-Ring
(2)
is a
Parker - #2-241-N674-70
Annual Maintenance (
continued
)