Eppendorf CO2 Back-up System - Manual (Page 16)

Installation
New Brunswick CO2 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.
3. Insert the temperature sensor through the hole in the black blanking plug provided, pressing the
grommet on the sensor cable into the hole to seal.
4. Insert the temperature sensor through one of the insulation tubes provided and push the sensor and
insulation tube into the cabinet port.
5. Press the nylon plug into the hole.
6. Inside the freezer cabinet, position the temperature sensor next to the existing freezer temperature
sensor. The existing freezer temperature sensor is located halfway into the cabinet. (For the model U101
freezer, the temperature sensor cable should be secured to the left side of the internal cabinet and pass
under the fixed shelf. Position the CO
2
temperature sensor next to the existing freezer temperature
sensor).
7. Secure the CO
2
temperature sensor to the freezer temperature sensor using one of the plastic cable ties
provided.
8. Secure the temperature sensor cable to the two attachment points (plastic clips) attached to the cabinet.
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 CO
2
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 CO
2
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.
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.