Vitrifrigo C51i CHR 12/24V connections

This is the Vitrifrigo C51i CHR 12/24 V DC refrigerator, with a 51 L cabinet and 3.6 L freezer compartment. The exact-model manufacturer data sheet, retained from a distributor mirror, identifies C51i CHR but lists electrical absorption as N.A. Consequently the catalog leaves running watts, running amps and startup amps unset. Cabinet capacity and a branch fuse cannot fill that gap.

The downloaded C-series manual explicitly includes C51I. Its installation guidance is family-level; compare the compressor/controller and appliance label with the fitted CHR unit before applying controller-specific details. The catalog represents the DC input, not an optional AC/DC power module.

The electrical instructions, pages 25–26, recommend a direct battery supply following the controller instructions. Annex 4, page 75, specifies 15 A at 12 V or 7.5 A at 24 V and a main switch rated at least 20 A. The catalog's 15 A terminal boundary is a protected-circuit planning allowance, not a claim that the fridge draws 15 A or that its connector is rated for that continuous current.

Page 26 gives cable sizes of 2.5/4/6/10 mm² against maximum 12 V line lengths of 2.5/4/6/10 m; the corresponding 24 V lengths double. Apply the actual controller's length convention and account for the complete route and connections. Without verified running and starting demand, a complete calculated circuit or daily-energy prediction remains incomplete.

The recess instructions, pages 23–25, distinguish static, fan-cooled and remote condensers. Match the actual condenser layout to its ventilation drawing instead of borrowing a clearance from another variant. Keep lower air entry and heated-air escape clear, secure the cabinet using its intended frame or mounting points, and ensure no cable sits under the cabinet. Wait at least one hour after positioning before switching on.

Check door closure, ventilation and voltage at the compressor while it tries to start. The family manual's standard 12 V cutout/restart thresholds are 10.4/11.7 V, but optional controller settings can differ. Low voltage at the refrigerator may result from its wiring even when the battery looks healthy. Isolate before cleaning or defrosting, avoid puncturing the refrigerant circuit, and leave the cleaned door ajar during storage as described on pages 27–29.