Trane RTHC - Recommended Oil Charges; Replacing the Gas Pump Oil Filter

9 - 4 RTHC-IOM-1C
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 rubber mallet to break loose the nut that
secures the oil filter element to the filter manifold.
4 Turn the nut clockwise until the filter element
detaches from the manifold.
5 Remove the filter element and measure the exact
amount of oil contained in the filter bowl and
element.
6 Screw in the cartridge after filling the bowl with the
proper amount of refrigerant oil (see Step 5). Turn
the new cartridge counterclockwise and tighten
securely.
7 Connect manifold gauge set at oil charging valve
and evacuate the filter to 500 microns psig.
8 Charge the oil line back with the amount of oil
removed. Open the isolation valves to the oil
supply system.
Replacing the Gas Pump Oil Filter
The filter element in the gas pump circuit may need
to be changed if the gas pump is unable to return the
oil to the compressor.
An evaporator logged with oil will have a high liquid
level when referring to the liquid level sensor, low
suction pressurse, and higher than normal approach
on the evaporator.
Refer to
Figure 34 to determine if the pressure drop
across the filter is above the normal range at full load
conditions. Once the oil is logged in the evaporator, it
may be necessary to manually move the oil from the
evaporator to the oil sump to avoid lossof oil in the
main oil lines.
CAUTION
CAUTION: DO NOT add more oil to
the system
Table 29
Recommended Oil Charges
Compressor (digit
6 and 7)
Evap (digit 12
and 13)
Condenser (digit 16 and
17)
POE Oil charge (gal (L))
Without Oil Cooler
POE Oil charge (gal (L))
With Oil Cooler
B1 B1 B1 4.5 (17) 4.75 (18)
B1 C1 D1 4.5 (17) 4.75 (18)
B2 C2 D2 4.5 (17) 4.75 (18)
B2 B2 B2 4.5 (17) 4.75 (18)
C1 B2 C1 6.15 (23) 7.15 (27)
C1 B3 C2 6.15 (23) 7.15 (27)
C1 E1 F1 9.25 (35) 10.25 (39)
C2 B3 C2 6.15 (23) 7.15 (27)
C2 D3 E3 6.15 (23) 7.15 (27)
C2 G1 G1 10.5 (39) 11.5 (43)
D2 G3 G3 10.5 (39) 11.5 (43)
D2 F2 F3 9.25 (35) 10.25 (39)
D2 D2 E2 6.15 (23) 7.15 (27)
D1 G2 G2 10.5 (39) 11.5 (43)
D1 F1 F2 9.25 (35) 10.25 (39)
D1 D1 E1 6.15 (23) 7.15 (27)
D3 G3 G3 10.5 (39) 11.5 (43)
D3 D2 E2 6.15 (23) 7.15 (27)
E3 D2 E2 6.15 (23) 7.15 (27)
E3 F2 E2 9.25 (35) 10.25 (39)
E3 G3 G3 10.5 (39) 11.5 (43)