Replacing The Main Oil Filt E (Hot Filter) - Trane R Series Installation Operation & Maintenance

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Maintenance Procedures
6. This will allow the oil to travel from the schrader to the compressor. It
takes approximately 2 gallons of oil to fill the lines.
7. After charging the first 2 gallons, de-energize the master solenoid.
8. Open the ball valve just upstream of the schrader connected to the oil
pump. This will allow the remainder of the charge to flow to the oil sump.
9. Monitor the "Oil Loss Level Sensor Status in TechView under the Status
view. This display shows whether the optical sensor is seeing oil (wet) or
if it is not (dry).
NOTE: The remainder of the oil charge can be charged into the 1/4" service
valve located at the bottom of the sump if a larger connection is preferred.
Replacing the Main Oil Filter (Hot Filter)
The filter element should be changed if the oil flow is sufficiently obstructed.
Two things can happen: first, the chiller may shut down on a "Low Oil Flow"
diagnostic, or secondly, the compressor may shut down on a "Loss of Oil at
Compressor (Running) diagnostic. If either of these diagnostics occurs, it is
possible the oil filter needs replacement. The oil filter is not usually the cause
of a Loss of oil at Compressor diagnostic.
Specifically, the filter must be changed if the pressure drop between the two
service valves in the lubrication circuit exceeds the maximum level as given
in Figure 45. This chart shows the relationship between the pressure drop
measured in the lubrication circuit as compared with operating pressure dif-
ferential of the chiller (as measured by pressures in the condenser and evap-
orator).
Normal pressure drops between the service valves of the lubrication circuit
are shown by the lower curve. The upper curve represents the maximum
allowable pressure drop and indicates when the oil filter must be changed.
Pressure drops that lie between the lower and upper curves are considered
acceptable.
For a chiller equipped with an oil cooler, add 5 psid to the values shown in
Figure 45. For example, if the system pressure differential was 80 psid, then
the clean filter pressure drop would be approximately 15 psid (up from 10
psid). For a chiller with an oil cooler and operating with a dirty oil filter, the
maximum allowable pressure drop would be 28 psid (up from 23 psid).
Under normal operating conditions the element should be replaced after the
first year of operation and then as needed thereafter.
Refer to Table 4 - Table 6 and Unit nameplate for Oil charge information.
1. Isolate the oil filter by closing the two ball valves located before and after
the filter.
2. Relieve the pressure from the hydraulic line through the 1/4" schrader
valve located between the ball valve and the oil filter (or the ball valve and
oil cooler, if so equipped).
3. Use a strap wrench to break loose the nut that secures the oil filter ele-
ment to the filter manifold.
4. Turn the nut clockwise until the filter element detaches from the mani-
fold.
5. Remove the filter element and measure the exact amount of oil con-
tained in the filter bowl and element.
RTHD-SVX01D-EN