EMI WLCA Manuals

[email protected] ENVIROMASTER INTERNATIONAL LLC 1 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 manufac- tured 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) ver- sions; 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, elec- tric 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 work- ing environment. CONTROLS AND COMPONENTS LOW VOLT TRANSFORMER (Standard): 24 Volt. ELECTRO-MECHANICAL (Standard): Thermostat options are cooling only, cooling and one stage auxiliary heat, cool- ing 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 opera- tion (i.e., cooling only, cooling/electric heat, etc.) MICROPROCESSOR (Optional): A custom designed mi- croprocessor is fitted to the cassette to enable room condi- tions to be maintained at a user defined setpoint. Communi- cation 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 versatil- ity. 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 in- door unit that defrost of the outdoor coil is taking place. This allows the same micro to control both heat pump and cool- ing only units. The receiver contains a self diagnostic fea- ture. When a low indoor coil temperature is detected the cooling action is stopped. If a sensor fails then an alarm is EMI DUCTLESS SPLIT SYSTEM CASSETTE EVAPORATOR INSTALLATION MANUAL/OPERATING INSTRUCTIONS P/N# 240-4235 Rev. 1.6 [1/05] NOMINAL CAPACITIES: CAH/CAHW: 9,000 - 48,000 Btuh CAF/CAF4: 8,000 - 36,000 Btuh