Eppendorf LN2 Backup System - Manual (Page 17)

Installation
New Brunswick LN2 Back-up System
English (EN)
17
5. Remove freezer temperature sensor cover and position the two sensors side-by-side.
6. Fasten the two sensors with the plastic cable ties provided.
7. Replace the temperature sensor cover.
6.5 Installing the insulated transfer hose
The insulated transfer hose consists of a 2 m (6.6 ft) hose that is surrounded by a tube of thermal insulation.
6.5.1 For upright freezers (including Model U101)
1. Attach the smaller fitting of the insulated transfer hose to the solenoid valve assembly.
2. Rotate the fitting clockwise to tighten.
6.5.2 For chest freezers
1. Remove the compressor housing panel.
2. Remove the 2-inch blanking plug from the rear panel of the freezer.
3. Insert the smaller fitting of the insulated transfer hose through the port; pull enough hose through to
attach to the solenoid valve assembly.
4. Rotate fitting clockwise to tighten.
6.6 Solenoid valve to freezer installation
The solenoid valve is fitted to the freezer through the port fitted with a nylon plug and surrounded by a ring
of four screws. The port is located (a) on the top panel, in the rear right-hand corner on Upright models
(except for the Model U101: see NOTE below), or (b) inside the compressor compartment on Chest models.
NOTE: On the U101 Innova freezer, the injector port is located on the left-hand side wall.
6.6.1 Solenoid valve installation for upright freezers
1. Remove the nylon plug and the 4 screws surrounding the plug. Retain the screws for reuse. The washers
can be discarded.
2. Remove the protective cap from the end of the solenoid valve injector pipe.
3. Holding the solenoid valve, slide one of the short insulation tubes provided over the copper injection
pipe.
4. Push the injector and insulation tube into the exposed port in the freezer cabinet.
5. Align the Z-shaped bracket attached to the solenoid valve body over the four mounting holes and, using
the four screws previously set aside, secure the bracket to the body of the freezer.
6. Tighten screws evenly to lock the solenoid valve into position.