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OPTIC REPLACEMENT INSTRUCTIONS
Warning: DISCONNECT the unit from the electrical power source before performing any
maintenance or cleaning on the MDU/RX™ Unit.
Caution: Optics contain Mercury. Read and follow the Safety Information on pages 2 and 3
of this manual when handling the optics in the MDU/RX™ unit.
Step 1 – Turn MAIN POWER switch to the OFF position
Step 2 – Unplug power cord from the electrical receptacle
Step 3 – Using the supplied key, unlock and remove both end panels
Step 4 – Remove filter cover plate and filter
Step 5 – Remove optics following these instructions:
Caution: Use clean powder free latex gloves and eye protection when handling the optics in
this unit
With a firm grip on the upper porcelain end of the optic, use your other hand to grip the
optic connector.
Gently 'wiggle' connector while pulling from the optic base.
Gently pull optic from three lamp supports (Do not put any pressure on the side of the
optic without support).
Step 5 – Install new optic following these instructions:
Remove new optic from packaging and gently insert into the three optic clips.
With a firm grip on the upper porcelain end of the optic, use your other hand to grip the
optic connector.
Gently connect the optic connector to the optic.
Note: Optic connector is keyed with the optic base and will connect in one direction
only
Ensure optic connector and optic base are firmly pressed together.
Step 6 – Re‐install end panels and lock with the supplied key
Step 7 – Re‐install filter and filter plate
Step 7 – Plug power cord back into the electrical receptacle
Step 8 – Test unit for proper operation
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