ASP sterrad NX, Service & Troubleshooting Manual

Page: 83 / 126

Subassembly Removal and Replacement
5
Preparation: 1. Turn off the lamp.
2. Remove the front top panel and the top panel.
Removal: If you are removing just the lamp, use step 3 only.
1. Unplug cable P20.
2. Use soft-jaw pliers to unscrew the collar to the Ultratorr fitting.
3. Loosen, but do not remove the lamp retainer screw. Remove the
lamp.
4. Lift the lamp housing up to remove.
5. Remove the spacer and the O-ring from inside the Ultratorr fitting.
6. Insert a 1 mm hex wrench through the hole in the top of the lamp
housing to loosen the lamp retaining screw.
7. Gently pull the UV lamp and socket assembly out of the lamp
housing.
8. Unscrew the base of the lamp housing and remove the O-ring and
the optical window.
Replacement: If replacing just the lamp, use step 1 only.
1. Install a new UV lamp in the lamp housing. Making sure to align
the mark on the lamp with the mark on the lamp housing. Replace
the set screw and do not overtighten.
2. Install a new optical window and O-ring in the lamp housing (if
necessary).
3. Clean the inside of the Ultratorr fitting. Lightly coat a new O-ring
with approved vacuum grease and place the O-ring in the Ultratorr
fitting. Reinstall the spacer in the Ultratorr fitting.
4. Place the threaded collar around the base of the lamp housing.
Insert the lamp housing tube into the Ultratorr fitting. Press down
until it is seated firmly.
5. Orient the lamp housing so that there is no interference with the
lamp cable. Use soft-jaw pliers to tighten the collar.
6. Reconnect cable P20.
STERRAD
®
NX
™
Service Guide 83