28
Lib
er
at
ors
Repair Procedures
XII
b. Capacitance Test:
1. Remove shroud assembly (See RP2).
2. Disconnect the wires leading from the manifold harness as-
sembly to the level meter by disconnecting the JST connec-
tor, which is zip-tied to the bracket.
3. Connect JST connector on capacitance meter adapter to
manifold harness assembly (Item 29).
4. Connect alligator clip to manifold bracket.
5. Read manifold capacitance and compare to the acceptable
ranges found in Table 8. If it does not meet specifications, call
Technical Support.
RP9 – Manifold Assembly RR (Figure 13 )
a. Remove shroud assembly (See RP 2).
b. Disconnect compression fitting (Item 34E) from top of econo-
mizer valve (Item 35). Also disconnect compression fittings on
the sides of the economizer valve (Item 35).
c. Disconnect compression fitting from liquid withdrawal port
(Item D) being careful not to kink vaporizer coil or internal
PTFE tube.
d. Disconnect compression fitting (Item 34F) from FCV (Item 24).
e. If desired follow RP17 to remove coils from the top of the
Liberator in order to make manifold removal easier.
f. Remove the three bolts (Item 31) that run through the FCV
bracket (Item 39) and through the manifold plate into the top
of the dewar.
g. Remove two remaining manifold mounting bolts (Item 31, not
visible in Figure 12), while holding manifold in place.
h. Lift manifold assembly straight up to remove.
i. Place dewar cap on dewar opening.
j. To replace manifold assembly, reverse above procedure. Apply
small amount of fluorolubricant to O-ring (Item 50) before as-
sembly. Torque manifold mounting screws (Item 31) to 10–11
N-m (90-100 in-lbs) using cross-tightening method.
RP8 – Manifold Capacitance Test (Figure 12)
a. Capacitance Meter Set-Up:
1. Connect capacitance meter adapter to capacitance meter ac-
cording to Figure 12.
2. Turn on capacitance meter and select 200 pF range.
3. Move zero adjustment on the front of the meter until the dis-
play reads zero.
Ground
NOTE: Make sure unit is empty and at room temperature before
testing.
WARNING:
Before removing manifold assembly, Liberator must be
empty, warm and vent valve open.
FIGURE 12:
Manifold Capacitance Test Setup
TABLE 8:
Manifold Capacitance Specifications
Model
Low Limit (pF)
High Limit (pF)
Liberator 20
125
160
Liberator 30
125
170
Liberator 37
130
170
Liberator 45
140
180
Liberator 60
140
180
Liberators Technical Service Manual • PN 13350704 Rev
K
