62-12259 8–4
8.4.1 AutoFresh Fresh Air Exchange
Figure 8.1 Automatic Fresh Air Exchange
1. Cover
2. Gasket
3. Housing
4. Solenoid
5. Inlet Connection
6. Outlet Connection
7. Solenoid Hardware
8. Cover Hardware
8.4.1.1 Cover and/or Cover Gaskets Replacement
1.
Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and
disabling the starter.
Disconnect the high voltage source and lockout/tagout the receptacle.
2. Loosen outermost cover mounting nut (8, Figure 8.1) to unlock hardware and remove hardware holding
cover (1) in place.
3. Slide cover off solenoid shaft (4), remove and replace gaskets (2). Slide cover in place against inner
hardware to ensure cover gasket is slightly compressed to form a good seal. If required, adjust inner
hardware and re-lock in place.
4. Install outer hardware (two plain washers, a lock washer and two nuts). Torque nut against cover lock
washer to 120 inch/lbs (13.6 Nm) and then re-lock outer nut.
5. Re-enable the starter, start unit and run Pretrip to check operation.
8.4.1.2 Solenoid Replacement
1.
Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and
disabling the starter.
Disconnect the high voltage source and lockout/tagout the receptacle.
2. Remove cover in accordance with preceding step. Loosen innermost cover mounting nut to unlock and
remove remaining cover hardware.
3. Disconnect solenoid connector, remove hardware (7) attaching old solenoid and bring new solenoid in
place. Torque mounting hardware to 120 inch/ lbs (13.6 Nm), reconnect connector.
4. If housing (3) is replaced, torque all mounting hardware to 120 inch/lbs (13.6 Nm).
5. Reinstall and adjust cover in accordance with preceding step.
6. Re-enable the starter, start unit and run Pretrip to check operation.
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