IS-20929
Service Bulletin Details
Public Details for: IS-20929
Uv lights installation in ac compartment
- 2021 - 2020 - 2019 - 2018 - 2017 - 2016 - 2015 - 2014 -
Models from 2021
2021 PREVOST H3-41 |
2021 PREVOST H3-45 |
2021 PREVOST X3-45 |
Models from 2020
2020 PREVOST H3-45 |
2020 PREVOST X3-45 |
Models from 2019
2019 PREVOST H3-41 |
2019 PREVOST H3-45 |
2019 PREVOST X3-45 |
Models from 2018
2018 PREVOST H3-41 |
2018 PREVOST H3-45 |
2018 PREVOST X3-45 |
Models from 2017
2017 PREVOST H3-41 |
2017 PREVOST H3-45 |
2017 PREVOST X3-45 |
Models from 2016
2016 PREVOST H3-41 |
2016 PREVOST H3-45 |
2016 PREVOST X3-45 |
Models from 2015
2015 PREVOST H3-41 |
2015 PREVOST H3-45 |
2015 PREVOST X3-45 |
Models from 2014
2014 PREVOST H3-41 |
2014 PREVOST H3-45 |
IS-20929 Instruction Sheet UV LIGHTS INSTALLATION IN AC COMPARTMENT First Release 09-30-2020 H SERIES FROM E-2662 ; X SERIES FROM F-5760 MATERIAL Kit #IS20929 includes the following parts: Part No. Description Qty 7771178 UVC LIGHT KIT 1 N91098 UV RESISTANT CABLE TIE 8" LG, BLUE 20 IS-20929 INSTRUCTION SHEET 1 FI-20929 INSTRUCTION SHEET 1 Available replacement parts: Part No. Description TBD UVC Tube 25W 830155 Ballast T8 32W TBD Wiring Harness UV1-A TBD Wiring Harness UV1-B TBD Wiring Harness UV2-A TBD Wiring Harness UV2-B TBD UVC tube central support TBD Main wiring Harness 563332 Relay 24V NOTE Material can be obtained through regular channels. CAUTION HIGH INTENSITY ULTRAVIOLET LIGHT. WHEN THIS KIT INSTALLATION IS COMPLETED, AVOID EYE & SKIN EXPOSURE. TURN OFF UV-C LIGHTING BEFORE ACCESSING THE COMPARTMENT. Writer: mgIS-20929 Page 2 / 11 PROCEDURE DANGER Park vehicle safely, apply parking brake, stop engine. Prior to working on the vehicle, set the ignition switch to the OFF position and trip the main circuit breakers equipped with a trip button. On Commuter type vehicles, set the battery master switch (master cut-out) to the OFF position. Lock out & Tag out (LOTO) must be performed during set-up, maintenance or repair activities. Refer to your local procedure for detailed information regarding the control of hazardous energy. 1. Open the main AC compartment door and remove the plastic cover protecting the I/OEB module (located between the two main ducts). 2. Disconnect the I/O-EB module. Also disconnect all harness connections and cable ties that prevent the removal of the upper cover (on which is mounted the I/O-EB module). 3. Remove the top and bottom cover to access the AC motor and evaporator coil. Writer: mg IS-20929 Page 3 / 11 4. Two 7/8in holes must be drilled behind the evaporator housing ducts (one on each side) to allow passage for the tubes power cables. − The left side hole must be drilled 3.75in from the top of the housing and 3.25in from the cover opening. − The right side hole must be drilled 2.25in from the top of the housing and 2.5in from the cover opening. NOTE For this procedure, a knockout punch was used to perforate both holes in the housing. If knockout punches are unavailable, the holes can be drilled using a large step drill or a corresponding diameter hole saw. 5. Secure the UV1-B harness gray tube connector to the top support opening (gray connector is labeled FLUO-L2). 6. Secure the UV2-A harness gray tube connector to the lower support opening (gray connector is labeled FLUO-R3). Writer: mg IS-20929 Page 4 / 11 7. Position the support at the top of the housing and maintain in place using locking C-clamp. − Keep the support centered in the opening as much as possible. − The support tabs must sit flat against the top 45deg part of the housing. 8. From the inside (using an angled drill), drill the two mounting holes in the housing (use the holes in the support tabs as a guide). Use a short 1/4 or 7/32 in (6mm) drill bit. 9. Secure the support using the supplied screws, washers & nuts. Writer: mg IS-20929 Page 5 / 11 10. Remove the (plastic gray) tube hold-down nuts from all harnesses (UV1-A, UV1-B, UV2A & UV2-B). Slide the hold-down nuts over the two tubes. 11. Insert a UV tube in the bottom UV2-A/FLUOR3 connector (and tighten the hold down nut). − Have the other end of the tube contact the inside wall panel of the housing. − Keep the tube leveled as much as possible (horizontal & vertical). 12. Using a sharpie, insert your hand and mark the tube position (perimeter of the tube). 13. Repeat operation 11 & 12 for the other side (top) UV1-B/FLUO-L2 connector. Writer: mg IS-20929 Page 6 / 11 14. From the inside, drill a small pilot hole in the middle of the marks (both sides). 15. Before drilling the final (larger) holes, validate from the outside of the housing that the pilot holes are drilled at the correct positions. − Both pilot holes should be located approximately 1.75in from the edge of the housing (horizontal position). − Top tube pilot hole should be located approximately 5.5 in from the top of the housing and the lower pilot hole 8.75 in from the top (vertical positions). NOTE The pilot hole positions given above are approximate, some variations are acceptable. If the holes position are way off, re-adjust accordingly and drill new holes in correct positions. Writer: mg IS-20929 Page 7 / 11 16. Once the pilot holes correct positions are confirmed, enlarge the holes (both sides) to 1.375in using a knockout punch or other suitable tool. NOTE For this procedure, a knockout punch was used to enlarge the holes in the housing. If knockout punches are unavailable, the holes can be drilled using a large step drill or a corresponding diameter hole saw. 17. Pass the UV1-B & UV2-A harness through the top openings and secure their black fittings with the conduit locknuts. 18. Insert a fluo tube in each center connector (FLUO L2 & FLUO R3). Writer: mg IS-20929 Page 8 / 11 19. Insert the gray FLUO L1 (top/left) & FLUO R4 (bottom/right) connectors through the side holes of the housing to connect the fluo tubes. 20. Secure the gray FLUO L1 (top/left) & FLUO R4 (bottom/right) connectors to the sides of the housing using the conduit locknuts. 21. Hand tighten the four inner tube nuts to finalize the tubes installation in the evaporator housing. Writer: mg IS-20929 Page 9 / 11 22. Replace all the cable ties attached to the fan motor power cable (+ POS) by the supplied N91098 UV resistant cable ties. 23. Reinstall the housing top cover with the I/OEB module (hand tight the screws). 24. Reconnect the module, relays and surrounding harnesses. Also secure the harnesses with new N91098 UV resistant cable ties. 25. Locate the R12 relay at the lower right corner of the cover (just below the I/O-EB module). − Connect the CB3 fused wire (10 amps) of the ballast box to the CB3 connection of the R12 relay (left wire). Writer: mg IS-20929 Page 10 / 11 − Disconnect the R12 relay AMP type connector (sealed) and connect the two R12 connectors of the ballast box. One end goes to the relay the other end to the disconnected harness. − Connect the ballast box ground connection to the ground stud of the fan motor (GND). 26. Connect the four tubes connectors to the UV tubes ballast box. Connectors are numbered and must fit with the numbers on the box connectors. 27. Fit the fully connected ballast box to the black plastic cover that goes over the I/O-EB module. − Secure the plastic cover (and ballast box) over the module. − Secure the harnesses coming out of the ballast box as required using UV resistant cable ties. − Do not reinstall the lower cover of the housing or tighten the upper cover screws yet. Writer: mg IS-20929 Page 11 / 11 28. Set the main switch & circuit breakers to the ON position and activate the AC system. CAUTION DO NOT LOOK DIRECTLY AT THE UV LIGHT − Make sure that both UV tubes are working properly. − Also make sure that both tubes are off when the vehicle AC is not running. 29. After the correct operation is confirmed, the lower cover can be put back in place and the upper cover screws tightened. 30. Install the supplied warning sticker to the lower cover to finish the installation. PARTS / WASTE DISPOSAL Discard waste according to applicable environmental regulations (Municipal/State[Prov.]/ Federal) Writer: mg