Helmer Scientific i.Series
®
and Horizon Series
™
Freezer - Undercounter
Service and Maintenance Manual
360417/A
61
11.3 Check Probe Bottle
Remove the probe bottle from the bracket and inspect for cracks. Replace the bottle if necessary.
Ensure the probe bottle has approximately 4 oz (120 mL) of product simulation solution (1:1 ratio of water to propylene glycol). The
propylene glycol is mixed with water to create a solution which simulates the product stored in the freezer. The product simulation
solution temperature reflects the product’s temperature during normal operation. Failure to fill the bottle may prevent the chamber
temperature from stabilizing at the temperature setpoint. The probe should be immersed at least 2” (50 mm).
11.4 Upper and Lower Door Hinge Cams
Lubricate Upper and Lower Door Hinge Cams
1.
Using a flathead screwdriver, carefully pry hinge covers off the hinges.
2. Using a 1/16” Allen wrench, loosen the set screw inside the hex nut on top of the spring.
3. Using a 7/16” wrench, loosen the hex nut. The hinge pin will drop from below allowing the
spring to be removed. Set the hinge pins and springs aside.
4. Separate the upper and lower hinge cams and apply grease.
5. Press the hinge covers into place to reinstall.
11.5 Clean the Freezer
Cabinet Exterior
Clean exterior surfaces with a soft cotton cloth and non-abrasive liquid cleaner.
Cabinet Interior
Clean painted surfaces with mild detergent. Clean stainless steel surfaces with a general-purpose laboratory cleaner suitable for
stainless steel.
Condenser Grill
Disconnect the freezer from AC power when cleaning condenser grill.
NOTICE
Some equipment surfaces may be sharp. Take care when cleaning to avoid injury.
If the freezer is located in an environment where it is exposed to excessive lint or dust, the condenser grill may require cleaning
more frequently than stated in the preventive maintenance schedule.
Clean the condenser grill using a soft brush and a vacuum cleaner.
Door Gaskets
Clean with a soft cloth and mild soap and water solution.
Probe Bottle (if installed)
Clean and Refill Probe Bottle
1. Remove all probes from the bottle.
2. Remove the bottle from the bracket and empty any remaining solution.
3. Clean the bottle with a 1:9 ratio of bleach to water solution or a company approved cleaner/disinfectant.
4.
Refill the bottle with 4 oz. (120 mL) of product simulation solution (1:1 ratio of water to propylene glycol).
5. Cap the bottle tightly to minimize evaporation.
6. Place the bottle in the bracket.
7. Replace the probe(s), immersing at least 2” (50 mm).
Horizon Series
