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Resumen del manual
1.6 [1/05] CAH/CAHW: 9,000 - 48,000 BtuhCAF/CAF4: 8,000 - 36,000 Btuh GENERAL STATEMENT IMPORTANT: The information contained in this manual is critical to the correct operation and main- tenance of the EMI cassette and should be read by all persons responsible for the installation, start up and maintenance of the unit. SAFETY: The equipment has been designed and manufactured to meet international safety standards but, like any mechanical/electrical equipment, care must be taken if you are to obtain the best results. 1. Service and maintenance of this equipment should only be carried out by skilled personnel. 2. When working with any air conditioning unit ensure that the electrical disconnect supplying the unit is switched off prior to servicing or repair work and that there is no power to any part of the equipment. In the case of a DX system, both the indoor and outdoor units should be switched off. 3. Also ensure that there are no other power feeds to the unit such as fire alarm circuits, BMS circuits, etc. 4. Electrical installation, start up and maintenance work on this equipment should be undertaken by competent and trained personnel in accordance with local relevant standards and codes of practice. SPARE PARTS: For ease of identification when ordering spare parts or contacting Enviromaster International LLC about your unit, please quote the model number and serial number. This information can be found on the rating plate attached to your unit. PRODUCT DESCRIPTION The EMI Cassette series is available in nominal capacities of 9,000 to 48,000 Btuh in DX refrigeration and reverse cycle heat pump (CAH) or DX with hot water coil (CAHW) versions; also available are two pipe chilled water (CAF) and four pipe chilled and hot water versions (CAF4) in 8,000 to 36,000 Btuh capacities; and, depending on the model, electric heat can also be factory fitted as an option. Designed for low noise levels, easy installation and maintenance and a slimline fascia, all ensure minimum obtrusion into the working environment. CONTROLS AND COMPONENTS LOW VOLT TRANSFORMER (Standard): 24 Volt. ELECTRO-MECHANICAL (Standard): Thermostat options are cooling only, cooling and one stage auxiliary heat, cooling and one stage mechanical heating (heat pump system) or cooling and two stage heating (heat pump & second stage auxiliary heat). An optional thermostat can be obtained through EMI or your local distributor. NOTE: Make sure the thermostat is suitable for unit operation (i.e., cooling only, cooling/electric heat, etc.) MICROPROCESSOR (Optional): A custom designed microprocessor is fitted to the cassette to enable room conditions to be maintained at a user defined setpoint. Communication to the controller is by a hand held infrared transmitter, which includes a wall mounting bracket as standard. The microprocessor allows five operating modes. These modes are - fan only, dry cooling, cooling only, heating only and heating/cooling auto changeover for maximum versatility. A temperature setpoint between 58°F - 90°F can also be selected. The microprocessor monitors indoor coil temperature and return air temperature. In heat pump units, a 24VAC signal from the condensing unit is also monitored to signal the indoor unit that defrost of the outdoor coil is taking place. This allows the same micro to control both heat pump and cooling only units. The receiver contains a self diagnostic feature. When a low indoor coil temperature is detected the cooling action is stopped. If a sensor fails then an alarm is EMI@ENVIROMASTER.COMENVIROMASTER INTERNATIONAL LLC 1 displayed on the fascia mounted receiver. The microprocessor also limits the number of compressor starts per hour to reduce wear on the compressor. displayed on the fascia mounted receiver. The microprocessor also limits the number of compressor starts per hour to reduce wear on the compressor. A fascia mounted receiver displays On/Off, cool or heat and timer/alarm status. FILTERS: Wire framed filters are fitted. These are reusable and may be vacuum cleaned. CONDENSATE PUMP: A condensate pump is fitted to carry water out of the unit. The pump is fixed to a mounting bracket which can be withdrawn from the side of the chassis and incorporates an inspection hole to allow a visual check of the pump during operation. A float switch is fitted to stop the cooling action should the pump become blocked or fail. IMPORTANT: TOTAL LIFT FOR THIS PUMP IS 18” OR LESS. AIR VANES: Air outlet vanes are manufactured from aluminum and covered with nylon flock to prevent condensation from forming. Vanes are manually adjustable on the 2 x 2 model units or driven by an electric motor on all other model units. Where fitted, the motorized air vanes can be set to auto sweep or can be stopped in a fixed position. HEATING: The cassette may be fitted with either electric heaters or a hot water coil. It is recommended that heat pumps be fitted with the electric heat option to offset the defrost cycle. Electric heaters a...