Maine Container Depot – Maine Portable Sheds and Garages ...



Refrigerated Container Site PreparationALL ELECTRIC CONTAINER REFRIGERATION UNIT SITE PREPARATIONElectrical RequirementsIt is the customer’s responsibility to ensure that all electrical work completed on their property meets local codes. Any system requirements that are not understood should be questioned. It is recommended that a local licensed electrician be employed to complete this work. Proper electrical requirements must be met to operate a cold storage container.PowerUnits operate on 460/480 VAC, 3-phase, 60 Hz power with a maximum electrical load, under rated operating conditions, not to exceed 18.75 kVA. The power consumption shall not exceed 15kW.Step-up power transformers can be made available if 230/240 VAC power sources are present. In both cases the source power must be 3-phase and 60 Hz.If one is investing in new electrical service for this application 460/480 VAC is most likely the more economical choice. These refrigerated storage systems will only operate on 230 VAC if the proper step-up power transformer is requested at the time of booking. Operating the unit on “non-design” source power may lead to personal injury, equipment damage/failure, or cargo loss. Damages and call out fees experienced as a result of the use of improper source power will be billed back to the customer on contract. Refrigerated containers or "reefer containers" should be hooked up by a professional electrician.Phase SequenceSince the compressor motor, which is the only 3-phase component on the refrigeration system, can rotate in either direction, having the proper phase sequence is not an issue. Fan motors are single phase.Reefer Unit Circuit Breakers FYI – These breakers are built into the reefer system.460/480 VAC (25 amp) circuit breaker - must trip at 29 amps (standard)230/240 VAC (50 amp) circuit breaker - must trip at 62.5 amps (optional)Hardwiring vs. Use of ReceptaclesThere are two ways to connect the unit’s voltage power cable to electrical service.Hardwiring – which typically requires that a licensed electrician connect each of 3 powerlegs and one ground connection to an electric service panel.Receptacles – if unit will be connected and disconnected frequently this may be the bestmethod to connect the unit to power.Electrical Plugs There are two plug designs on the market that can be used with this equipment, a marine and a domestic type plug.Marine plugs CEE-17:If customer will operate on 460/480 VAC and plans to hardwire the same, they can their electrician remove the supplied plug upon arrival at site. PLM requires that this plug be reinstalled when returned. Parts and labor for missing plugs will be charged back to the customer.Marine Plug Specifications:For 460/480 VAC power use 380/440 VAC, 32 AMP, 3-Pole, 4 Wire plugFor 230/240 VAC power use 250 VAC, 50 AMP, 3-Pole, 4 Wire plugPlug/Receptacle source – ERO Electric Reefer Outlets Plugs:Trailer refrigeration systems with electric stand-by typically use a domestic type of plug. If the customer requires a domestic plug they will need to arrange for the purchase and installation of the same.Domestic Plug/Receptacle Source - HUBBELL The customer’s electrician should determine if Hubbell’s TWIST-LOCK? devices (3 Pole, 4 wire ground plugs and receptacles available in both 480VAC, 50A, 3φ and 250VAC, 50A, 3φ) meets their local requirements. Land Site Preparation Grounded Operation: If unit will be placed on the ground, without a chassis (wheels), note the following points: The surface that the unit will be placed on must be level and free of accumulating water.Unit must be placed within 50 feet of a power receptacle or service box.Containers are designed to be supported by all four (4) corner castings. If the container cannot be placed on a level concrete surface where only the corner castings are touching the ground, use railroad ties or paving stones to support the corner castings. Never attempt to support the container from any other point(s) on the bottom of the frame.Position the machinery end of the container no less than 3 feet from a wall or other objects that may block the airflow.Units have 4ft wide, bifold swing rear doors.Ensure there are no physical obstructions to prevent doors from opening fully before “placing” unit.Units should be operated in areas with ambient temperatures below 100°F, and never exceeding 122 °F. ................
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