# Hydra-Kool Deli Cases and Open Merchandisers: Use and Care > How to install, run, clean and troubleshoot Hydra-Kool deli, seafood, bakery and gelato cases and open merchandisers, from the maker's manuals. How-to by Norpex. Published 2026-10-15, updated 2026-10-15. Canonical: https://norpex.ca/guides/hydra-kool-deli-cases-and-open-merchandisers ![Refrigerated seafood case with flat front glass](https://norpex.ca/m/bc/66/bc663d4085fabf5cf390fa671b2e8af8dab8c98c7757e006ca2d10def46b0407.jpg) Pictured: [Hydra-Kool KFM-SF-60-S 67″ Flat Glass Seafood Case](https://norpex.ca/product/hydra-kool-kfm-sf-60-s-67-flat-glass-seafood-case) This guide explains how to correctly install, operate, clean, and troubleshoot Hydra-Kool deli, bakery, gelato, and open merchandiser cases using the procedures and figures from the manufacturer's own manuals. ## Key takeaways - Always have a qualified, licensed installer handle electrical, plumbing, and refrigeration connections to local code. - KFM deli and seafood cases maintain 32°F, KBD bakery cases 39°F, KGV-MD/MR 32°F, KGV-MO 36°F, and KFM-GL gelato cases -20 to -18°C. - Clean the condenser monthly and the evaporator pan weekly, following the exact steps in the manual for your series. - Load only pre-chilled products, respect the load limits printed in each manual, and never block air discharge or return grilles. - For any repair beyond routine cleaning or lamp replacement, contact the manufacturer's authorized service network. ## Which manual covers your Hydra-Kool case Hydra-Kool produces several series of refrigerated display cases, and each series has its own installation and operation manual. The KFM series—including curved glass (KFM-CG), flat glass (KFM-FG), open front (KFM-OF), seafood curved glass (KFM-SC), seafood flat glass (KFM-SF), and seafood open front (KFM-SO) models—is covered by the KFM Installation and Operation Manual. That same manual also applies to KCP models. The KFM-GL curved glass gelato cases have a dedicated KFM-GL Instruction Manual. Bakery cases, both curved glass (KBD-CG) and flat glass (KBD-FG), are documented in the KBD Installation and Operation Manual. Open merchandisers with front doors or rear doors (KGV-MD, KGV-MR) and open front models (KGV-MO) are covered by the KGV Installation and Operation Manual, which also includes KGL series models. For KGH open merchandisers with electric shutters, consult the manufacturer's manual specific to that model. ## Installation requirements All Hydra-Kool cases are intended for indoor use only, on a level floor, away from direct sunlight, drafts, and air conditioning vents. The KFM Installation and Operation Manual states that units placed against a wall require a 2.4-inch clearance. The KGV Installation and Operation Manual specifies a safe distance of 2⅜ inches for models positioned against a wall. The KBD manual does not give a specific clearance figure; ensure adequate ventilation around the condenser area. The KFM-GL manual advises installing the equipment where the ambient temperature does not exceed 25°C and relative humidity does not exceed 60%. Electrical connections must be made by a qualified, licensed installer to local code. Every manual calls for a 120V/60Hz, grounded outlet with a NEMA 5-15P plug. The KFM manual adds that voltage fluctuations must not be greater than ±6%. Do not connect the case to a multiple socket block. For remote models, a drain must be prepared, and all refrigeration piping and wiring must be handled by a qualified technician. The KGV and KFM manuals note that remote units ship with nitrogen under pressure and an easy-prep kit for tubing connections. If you are joining multiple cases, follow the step-by-step joining instructions in the respective manual. The KFM, KGV, and KBD manuals all include detailed assembly diagrams and hardware lists. This work must be performed by a qualified technician using the specified bolts, washers, and nuts. ## Daily operation and temperature settings Each series has a control panel with a power switch, light switch, and electronic controller. The KFM/KCP manual shows buttons for on/off light, continuous cycle, defrost, and program. KGV and KBD panels are similar; the KFM-GL manual illustrates a digital controller with a main switch, lighting switch, and power outlet. Temperature set points are fixed by design. The KFM/KCP manual states the ventilated cooling system maintains a 32°F operating range. The KBD manual sets pastry and bakery cases to 39°F. The KGV manual specifies 32°F for KGV-MD/MR models and 36°F for KGV-MO open front models. The KFM-GL manual lists an operating temperature of -20 to -18°C for gelato. These cases are designed for temperature maintenance only. The KFM/KCP manual instructs you to leave the unit running for two hours before loading. Products must already be at the appropriate display temperature. Load evenly, keeping a 1-inch space between products and a maximum height 1 inch below the upper shelf. The KGV manual says to wait about 30 minutes before loading and to respect the shelf load limit of 31 lb/ft². KBD glass shelves have a 5.5 lb/ft² load limit. The KFM-GL manual gives a load limit of 26.9 lb/ft on the exposure plan and 9.4 lb/ft on each shelf. Never obstruct the air discharge or return grilles. ## Cleaning and routine care Before any cleaning, disconnect the unit from the power supply. For exterior surfaces, all manuals recommend a soft detergent or warm water; do not use abrasive cleansers. The KFM-GL manual specifies a 5% neutral detergent solution and drying with a soft cloth. Never use alcohol, methylated spirits, or solvents on plastics or painted surfaces. Interior cleaning: the KFM manual advises removing the front glass for easier access, then cleaning glass, metal, and plastic surfaces with soft detergent or warm water. The KBD manual gives the same instruction. For KFM-GL cases, wash the interior with warm water and 5% neutral detergent. When removing shelves, take care with light connections (KFM) or glass and light connections (KBD). Sliding rear doors on KFM and KBD models are removed by grabbing the door, pushing up, and tilting the bottom toward you. To replace a light, disconnect the light, unscrew the holder, insert a new lamp of the same type, and reconnect. The KFM-GL manual adds that you must first remove the acrylic protection with a screwdriver. Condenser cleaning: the manuals say the condenser must be cleaned every month. Disconnect power, remove the front panel or protection grille, and clean the condenser with a soft brush or vacuum. The evaporator must be cleaned by a qualified technician; the KFM manual describes lifting and removing exposition panels to access it. The evaporator pan should be cleaned weekly—disconnect power, remove the protection grille, unplug the pan, and wash it with soft detergent or warm water. For seafood models with fish pans, the KFM manual says a qualified technician must remove the front glass, empty the pan, clean it with detergent and warm water, and clear all particles from the drain. Inspect the drain monthly on remote models. ## Troubleshooting common issues The KFM Installation and Operation Manual includes a detailed troubleshooting table. If doors do not close, check for a level floor, obstructions, or worn bearings. Lights not working: verify the light switch position and connections. A warm case temperature may be caused by an obstructed air return grille, air drafts, high store temperature, a dirty condenser, a frozen evaporator, an incorrect set point, or overfilling the display area. Fans not working: inspect electrical connections and remove any debris. If the case is not aligning, check that the floor is level and review the joining instructions. A blank display points to the main power switch or electrical connections. Compressor not starting could be due to an open disconnect switch, blown fuse, tripped overload protector, low refrigerant charge, or a defective relay. The table also lists causes for continuous running, starting relay burnout, high or low head pressure, and unusual noise. The KBD manual contains a similar troubleshooting table. For KGV and KGL models, refer to the troubleshooting section of the KGV Installation and Operation Manual. The KFM-GL manual lists common problems and their remedies; consult that document for gelato cases. Always disconnect power before inspecting any component. If the issue persists, contact a qualified technician. ## When to call for service All service work beyond the cleaning and lamp replacement described in the manuals must be performed by a qualified technician. The KFM, KBD, and KGV manuals state that for spare parts you should contact your distributor. The KFM-GL manual emphasizes that the device may only be repaired by the authorized technical assistance service using original parts. Repairs should be arranged through the manufacturer's authorized service network. For any questions about a specific model, ask Norpex. ## Common questions ### What temperature should my Hydra-Kool deli case maintain? KFM series deli and seafood cases are designed to maintain 32°F. KBD bakery cases are set for 39°F. KGV-MD/MR models hold 32°F, while KGV-MO open front models hold 36°F. KFM-GL gelato cases operate between -20°C and -18°C. ### How often should I clean the condenser? The Hydra-Kool manuals call for cleaning the condenser every month. Disconnect the power, remove the front panel or grille, and use a soft brush or vacuum. ### Can I load warm products into the case? No. All Hydra-Kool cases are designed for temperature maintenance only. Products must be pre-chilled to the appropriate display temperature before loading. The KFM/KCP manual says to run the case empty for two hours before loading; the KGV manual says about 30 minutes. ### What clearance is needed behind the case? The KFM manual specifies a 2.4-inch clearance from the wall. The KGV manual specifies 2⅜ inches. The KBD manual does not give a specific figure, but you must ensure adequate ventilation around the condenser. The KFM-GL manual advises installing the unit away from heat sources and air currents. ### Who should install the equipment? A qualified, licensed installer must handle all electrical, plumbing, and refrigeration connections, following local code. The manuals explicitly state that installation and service operations must be performed by a qualified technician. ## Related guides - [Refrigerated Display Case Buying Guide: Deli, Gelato and Grab-and-Go](https://norpex.ca/guides/refrigerated-display-case-guide) - [Commercial Refrigerator and Freezer Temperatures: What to Set and Why](https://norpex.ca/guides/commercial-refrigerator-temperatures) ## Shop the catalogue - [Deli/Meat Showcase](https://norpex.ca/products/deli-meat-showcase) - [Open Air Coolers](https://norpex.ca/products/open-air-coolers) - [Gelato](https://norpex.ca/products/gelato-display-cases)