York form 201.30-ICOM1 (YVWA single compressor) lists the routine work in its Table 43: log operating data, check oil level, refrigerant level, oil return and oil heater, verify water flows, check for leaks, tighten electrical connections, back flush the VSD heat exchanger and replace the VSD coolant, run oil and refrigerant analysis, and clean and eddy-current test the tubes. The oil filter, 026-35601-000 with cover O-ring 028-13849-000 per form 201.30-RP1, is changed only when oil analysis shows a moisture issue, not on a fixed schedule; a HIGH OIL FILTER DPSI safety monitors the pressure drop across it.
What is on the York YVWA maintenance list?
These are the procedures in Table 43, "Operation/Inspection/Maintenance Requirements," in York form 201.30-ICOM1 (519), Section 7. The table has Daily, Weekly, Monthly and Annually columns; read each procedure's interval from the table in your manual.
| Area | Table 43 procedure |
|---|---|
| Logs | Record operating conditions on the applicable log form. Check programmable operating setpoints and safety cutouts. |
| Oil | Check oil level in the oil level sight glass. Check oil return system operation. Check oil heater operation. Perform oil analysis on compressor lube oil. |
| Refrigerant | Check refrigerant levels. Check and repair leaks as needed. Perform refrigerant analysis. |
| Water side | Verify condenser and evaporator liquid flows. Perform eddy current testing and inspect tubes. Clean evaporator and condenser tubes. |
| Electrical | Check motor starter operation. Check 3-phase voltage and current balance. Check and tighten all electrical connections. Check motor winding resistance. |
| VSD | Clean or back flush the VSD heat exchanger. Replace VSD coolant (after cleaning the heat exchanger). |
The table footnotes say the leak check must be done by a certified technician trained on this equipment, with a record kept on file by the equipment owner, and that more frequent service may be required depending on local operating conditions (or relaxed with good engineering controls on water quality). The section also says compressor vibration analysis is not prescribed, because a typical analysis can be misleading for this compressor design.
Which oil does a YVWA use, and how much?
Form 201.30-ICOM1 (page 132) says: "The compressor requires 2.4 gallons (9 liters) of YORK L oil." The store's YVWA Style A page lists York L oil, 011-00592-000.
- Check the level with the compressor operating at least 100 Hz. A level at the bottom of the lower sight glass, or near the top of the upper sight glass on the oil separator, can be normal depending on conditions.
- Do not add oil unless no level can be seen in the lower sight glass. Do not remove oil unless the level is above the upper sight glass.
- If no level is visible, the form says a qualified technician should add only enough oil to create a visible level in the bottom of the lower sight glass, run the chiller between 65% and 80% FLA for at least one hour while watching the level, then remove the approximate amount added.
When do you change the YVWA oil filter?
Not on a calendar. Form 201.30-ICOM1 says, "Periodic oil filter changes are not recommended." Change the oil, filter and filter driers only when an oil analysis shows a moisture issue.
The filter is also monitored. The panel shows HIGH OIL FILTER DPSI when the pressure difference across the filter reaches the programmable setpoint, 10 psid to 100 psid with a default of 65 psid, and starts a safety shutdown (page 135).
How do you replace the YVWA oil filter?
Summary of the procedure on page 135 of 201.30-ICOM1:
- Turn off the chiller and lock out/tag out.
- Isolate the compressor and remove its refrigerant. Bring it to atmospheric pressure with dry nitrogen.
- Remove the six cap screws holding the oil filter cover to the compressor housing (Figure 65). Remove the cover and its O-ring.
- Remove the filter. Examine any debris; the manual says it can indicate wear in the compressor.
- Install a new element and a new cover O-ring from the renewal parts list, seated so the filter cannot be bypassed. Lightly lubricate the O-ring with compressor oil.
- Reinstall the cover and torque the cap screws to 18 ft-lb (24.4 Nm).
- Leak check the cover, then evacuate the isolated compressor and recharge.
Form 201.30-RP1 Table 9 lists the compressor oil filter element 026-35601-000 (item 24, qty 1) and O-ring 2-152, 028-13849-000 (item 25, qty 1).
How do you service the YVWA VSD coolant?
Form 201.30-ICOM1 (page 144) says the chiller is shipped with a 50/50 mix of propylene glycol and York corrosion inhibitors, which must be removed because it lacks the properties the drive needs. Use York's Corrosion Inhibitor, part number 013-04129-000.
- Drain the coolant from the variable speed drive.
- Pour inhibitor into the top of the header pipe until the level is within ½ inch of the top.
- Run the pump manually to remove air pockets, and keep running it for 15 minutes, adding coolant as needed.
- "Never run the coolant pump without coolant!" Running it dry can damage the pump seals.
Table 43 pairs the coolant change with cleaning or back flushing the VSD heat exchanger first.
Parts involved
| Component | Role | Where to find it |
|---|---|---|
| Compressor oil filter element | 201.30-RP1 Table 9, item 24. | York 026-35601-000 Oil Filter Element | OEM Chiller Part |
| Oil filter cover O-ring (2-152) | 201.30-RP1 Table 9, item 25; replaced with every filter. | York 028-13849-000 O-Ring, Cover Plate | OEM Chiller Part |
| York L oil, 5 gal | The compressor takes 2.4 gal of York L (201.30-ICOM1); listed on our YVWA page. | York 011-00592-000 Oil, Compressor (York "L", 5 Gallon) | OEM Chiller Part |
| VSD coolant inhibitor | Named by part number in 201.30-ICOM1. | York 013-04129-000 Inhibitor, Corrosion (1 Gallon) | OEM Chiller Part |
| Filter-drier, 1 in. | 201.30-RP1: qty 1 on single systems (Table 5), 2 on dual (Table 6); changed with the oil when analysis shows moisture. | York 026-32839-000 Filter, Drier (1-14 UN-2A) | OEM Chiller Part |
| Teflon fiber seal, 3/4 in. OD | 201.30-RP1: qty 3 single system, 6 dual system. | York 028-12709-000 Seal, Teflon Fiber 3/4 OD | OEM Chiller Part |
| All YVWA parts | Browse by product line. | York YVWA Water-Cooled Screw Chiller Parts |
Which York units this applies to
- YVWA Style A: the procedures above; PIN 18 of the model number is the modification level (A), per 201.30-RP1.
- QWC4: our page lists the same 026-35601-000 element and 028-13849-000 O-ring; confirm by model and serial number.
- YVAA Style B: air-cooled VSD screw; our page also lists the 026-35601-000 element.
- YCIV Style A: air-cooled VSD screw; our page lists the same element, O-ring and York L oil.
Single or dual compressor? In 201.30-RP1, PIN 9–10 codes FX, GX or HX mean one compressor, and EE, FE or FF mean two.
Scope: York form 201.30-ICOM1 (519), Model YVWA single compressor, R-134a, Section 7 Maintenance (pages 131–144), read from a hosted copy; and York form 201.30-RP1 (825), YVWA Style A single and dual compressor, 120 to 300 tons, R-134a and R-513A. Dual-compressor units have their own IOM. York marks RP manuals reference only; verify parts by serial number. Products are listed by live title, not as a fit confirmation for your chiller.
Before you order
Send the chiller model number, serial number and full PIN, plus the part number from the old part. York's own parts process (SI0418, cited in 201.30-RP1) asks for photos of the part and where it mounts, which helps us too. Contact us at help@totalhvacparts.com or 610-487-7999.
Frequently Asked Questions
What oil does a York YVWA chiller use?
York L oil. York form 201.30-ICOM1 says the single-compressor YVWA requires 2.4 gallons (9 liters) of York L oil; York L in 5 gallons is part 011-00592-000.
How often should the York YVWA oil filter be changed?
Only when needed. York form 201.30-ICOM1 says periodic oil filter changes are not recommended; change the oil, filter and driers when oil analysis shows a moisture issue. The panel also monitors the filter with the HIGH OIL FILTER DPSI safety.
What is the HIGH OIL FILTER DPSI setpoint on a YVWA?
It is programmable from 10 psid to 100 psid, with a 65 psid default, per York form 201.30-ICOM1. Reaching it starts a safety shutdown.
What is the torque for the YVWA oil filter cover?
York form 201.30-ICOM1 gives 18 ft-lb (24.4 Nm) for the six cover cap screws.
What coolant goes in the YVWA VSD?
York Corrosion Inhibitor 013-04129-000. York form 201.30-ICOM1 says to drain the shipping glycol mix and fill to within ½ inch of the top of the header pipe.
Sources
- York form 201.30-ICOM1, YVWA Single Compressor R-134a Installation, Operation and Maintenance (rev. 519 Section 7: Table 43 p. 131, compressor oil p. 132, oil filter replacement p. 135, VSD coolant and tube cleaning pp. 143–144)
- York form 201.30-RP1, YVWA Style A R-134a and R-513A Single and Dual Compressor, Renewal Parts (PIN nomenclature pp. 8–14; Table 5 p. 22–23; Table 6 p. 27–28; Table 9 p. 37)
- Live product titles for the parts listed above, as shown on each product page; store model pages for YVWA Style A, QWC4, YVAA Style B and YCIV Style A
YVWA chillers carry VSD voltages and refrigerant under pressure. Service should be performed only by qualified personnel, following York's manual for your unit and your facility's lockout/tagout procedures.