74
TK 55676-19-IM-EN
Arctic Switch (Option)
Installation Procedures
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1. Locate Arctic Option harness ((WWTT22,,WWTT22--RRTTNN)) band wrapped inside unit, near top, right side of frame. Un-band and
route harness and connector out of unit, through hole in right side of frame, behind pre-cooler coil. Secure
connector to anchor provided on outside of panel as shown in illustration.
2. Locate IINNLLEETT coolant hose and measure approximately 6.00 in. (152.4 mm) out from APU.
3. Slide sleeving away to expose coolant hose and mark 3.00 in. (76.2 mm) to be removed.
4. Clamp off each side of coolant hose with a hose crimper to prevent excessive coolant loss.
5. Use a hose cutter and remove 3.00 in. (76.2 mm) section of coolant hose.
6. Install tube and sensor assembly with hose clamps.
IImmppoorrttaanntt:: When tube and sensor assembly is installed horizontally sensor must face down, when installed vertically
sensor must face towards APU ((DDEETTAAIILL AA)).
7. Plug sensor harness to mating 2-pin connector ((WWTT22,, WWTT22--RRTTNN)) located outside APU.
8. Provide a drip loop and secure all wires adequately with supplied band wraps.
9. Operate unit, check for leaks and reinstall sleeving on coolant hose.
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