Vfd Refrigerant Strainer (If Equipped); Oil Reclaim Filter; Inspect Refrigerant Float System - Carrier AquaEdge 19XR Start-Up, Operation And Maintenance Instructions Manual

condition indicates a need for more frequent replacement.
Change the filter by closing the filter isolation valves (Fig. 3-5)
and slowly opening the flare fittings with a wrench and back-up
wrench to relieve the pressure. A moisture indicator sight glass
is located beyond this filter to indicate the volume and moisture
in the refrigerant. If the moisture indicator indicates moisture, lo-
cate the source of water immediately by performing a thorough
leak check.

VFD Refrigerant Strainer (if equipped)

A refrigerant strainer is located in the
refrigerant to the VFD. The strainer should be replaced once a
year or more often if the strainer condition indicates a need for
more frequent replacement. Change the filter by closing the re-
frigerant cooling line isolation valves. Refrigerant pressure can
be relieved through access valves on the strainer housing.
Tighten / in. flare nuts to 55 to 66 ft-lb (75 to 89 Nm).
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Oil Reclaim Filter

The oil reclaim system has a strainer on the eductor suction
line, a strainer on the discharge pressure line, and a filter on the
cooler scavenging line. Replace the filter once every 5 years or
when the machine is opened for service. This filter does not
contain desiccant for moisture removal, so changing the filter
will not change the moisture indicator status. Change the filter
by closing the filter isolation valves and slowly opening the
flare fitting with a wrench and back-up wrench to relieve the
pressure. Change the strainers once every 5 years or whenever
refrigerant is evacuated from the cooler.

Inspect Refrigerant Float System

Perform this inspection only if the following symptoms are
seen.
• There is a simultaneous drop in cooler pressure and in-
crease in condenser pressure. This will be accompanied by
an increase in kW/Ton.
• The liquid line downstream of the float valve feels warm.
This indicates condenser gas flowing past the float. An in-
crease in kW/Ton will also occur.
1. Transfer the refrigerant into the cooler vessel or into a
pumpout storage tank.
2. Remove the float access cover.
3. Clean the chamber and valve assembly thoroughly. Be
sure the valve moves freely. Ensure that all openings are
free of obstructions.
4. Examine the cover gasket and replace if necessary. For lin-
ear style float valves inspect the orientation of the float
slide pin. It must be pointed toward the bubbler tube for
proper operation.
Note there are two styles of float valves in use on the 19XR
product line. Linear float valve (Fig 44) and ball float valves
(Fig. 45).
ECONOMIZER FLOAT SYSTEM (IF EQUIPPED)
For two-stage compressors, the economizer has a low side ball
type float system. The float refrigerant level can be observed
through the two sight glasses located on the float cover under
the condenser. See Fig. 45 for float detail. Inspect the float ev-
ery five years. Clean the chamber and the float valve assembly.
Be sure that the float moves freely and the ball bearings that
the float moves on are clean.
/ in. line that supplies
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48
1
LEGEND
1 — Refrigerant Inlet from FLASC Chamber
2 — Linear Float Assembly
3 — Float Screen
4 — Bubbler Line
5 — Float Cover
6 — Bubbler Line Connection
7 — Refrigerant Outlet to Cooler
8 — Gasket
Fig. 44 — Linear Float Valve Design
1
2
3
LEGEND
1 — Float Ball
2 — Refrigerant Exit
3 — Bearings
Fig. 45 — Economizer Float System (Two-Stage
Compressor Chiller)
ECONOMIZER DAMPER VALVE
The damper valve operation should be inspected annually (exter-
nal inspection) and internally when the refrigerant is removed
and it has been more than 5 years since last inspection or initial
start-up. See Fig. 46 for economizer damper valve detail.
2
3
4
5
6
7
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