Eppendorf LN2 Backup System - Manual (Page 16)

Installation
New Brunswick LN2 Back-up System
English (EN)
16
6.4 Temperature sensor installation
The temperature sensor is fitted to the freezer through the port fitted with a nylon plug. The hole is located
on either (a) 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.
On the U101 Innova freezer, the temperature sensor port is located on the left-hand side wall.
6.4.1 Temperature sensor installation for upright freezers
1. The temperature sensor is fitted through one of the two plugged ports.
2. Remove the plug that is not surrounded by four screws and set it aside.
3. Using the replacement blanking plug provided, insert the sensor through the hole in the plug and seal it
by pressing the rubber grommet located on the sensor cable into the hole.
4. Insert the temperature sensor through one of the insulation tubes provided and push the sensor and
insulation tube into the cabinet port. Install the nylon plug by pressing it ino the hole.
5. Inside the freezer cabinet, position the LN
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temperature sensor next to the existing freezer temperature
sensor, located halfway down the rear right-hand corner of the cabinet. (For the Model U101, skip now
to step 9. For all other models, complete steps 6 through 8 only.)
6. Remove the freezer temperature sensor cover inside the freezer cabinet and position the two sensors
side by side. Fasten with the cable ties provided.
7. Replace temperature sensor cover.
8. Using two more cable ties, secure the temperature sensor cable to the two fixing points (plastic clips)
attached to the cabinet of the freezer.
9. For the Model U101 freezer, complete Steps 9-12: the temperature sensor cable should pass under the
fixed shelf and be located on the right side of the internal cabinet. The probe should be attached directly
next to the existing freezer temperature probe.
10. Remove the freezer temperature sensor cover inside the freezer cabinet and position the two sensors
side by side. Fasten with the cable ties provided.
11. Replace the temperature sensor cover.
12. Using two more cable ties, secure the temperature sensor cable to the two fixing points (plastic clips)
attached to the cabinet of the freezer.
6.4.2 Temperature sensor installation for chest freezers
1. Remove the right side cover of the frezer to expose the compressor compartment.
2. Looking into the compressor compartment, at the top left-hand corner, the existing freezer temperature
sensor can be seen passing into the freezer cabinet. The LN
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temperature sensor should be fitted
through the same port.
3. Create a hole through the insulation next to the freezer temperature sensor by inserting a length of 1/
4-inch or ~6mm metal rod or tube through the insulation to create a passage for the probe (keeping the
rod or tube perpendicular to the cabinet wall when inserting through the insulation).
4. After creating the new hole, push the LN
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temperature sensor through the hole and pull enough
temperature sensor cable through the hole to reach the freezer temperature sensor, located
approximately halfway down the front right corner, inside the freezer cabinet.