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Summary of Contents for Lennox UNICO
- Page 1 TECHNICAL MANUAL...
- Page 3 This manual has been written for the dual purpose of providing Presentation an easy, comprehensive text for people who are interested in knowing more about our “UNICO” air conditioning system, Fundamental concepts and a useful guide to maintenance and repair of the equipment Heat and temperature for professional installers and service centers.
- Page 4 2.1.1 Heat which is now also compulsory in Italy. One kcal corresponds to 4.187 kJ and therefore one kJ corresponds to 0,239 kcal; Like electrical energy, heat cannot be seen but produces - the btu (still used today in anglosaxon countries) that effects that we perceive with our senses.
- Page 5 Fahrenheit scale, that gives the melting point of ice at - Convection, that is what happens when, for example, a atmospheric pressure the arbitrary value of 32 degrees (32°F) wall releases heat into the air at a lower temperature than and assigns a value of 212 degrees (212°F) to the the air touching it.
- Page 6 temperature and at low pressure and then condensing it at a Rapid calculation of loads of buildings higher pressure and temperature. The diagram for calculation of loads that we propose is From a general point of view pressure is the force that is necessarily simplified, but serves to make a rapid identification applied to a unit of surface.
- Page 7 For calculation of summer re-entries Client_______________________________________________ Street_______________________________ no.__________ ZIP______City____________________________________ Room examined___________________________________ Note 1 Consider only the window with the greatest total Re-entry______ W_________________________________ sunlight. Model proposed___________________________________ 2 Consider only the wall on which the above Calculation made by____________________on__________ window is located. MULTIPLIERS Totals Unit...
- Page 8 Client_Dr. Rossi__________________________________ via_____Bianchi________________ n°7 ZIP_00000 City Brescia Name of room inspected_ Living room_________________ Note 1 Consider only the window with the greatest total Re-entries______ W sunlight. Model proposed___9000 (2.755 W potential)____________ 2 Consider only the wall on which the above Calculation made by____________________on__________ window is located.
- Page 9 Coefficients of volumetric dispersion (W/m 3 ) Type of construction North Center South+islands Building on 1 floor with flat roof, rooms with: all walls exposed one wall in common with a heated room two walls in common with a heated room Rooms on the ground floor of a multiple-story building: all walls exposed one wall in common with a heated room...
- Page 10 can create, the pressure of the liquid drops abruptly, and part The components of the refrigeration circuit of it boils, cooling the rest to the evaporation temperature (7°C in the example). A refrigerating circuit consists of a series of basic components There are other parts that are called: assembled in such a way as to produce a cooling cycle that can be enhanced by various accessories.
- Page 11 Fig. 11 Fig. 9 4.3.1 Refrigeration circuit diagram of UNICO models for cooling only (figure 12) Evaporator As can be seen from the figure the refrigeration circuit of these...
- Page 12 Fig. 12 UNICO 8500 - 11000 BTU SF TUBO DI SERVIZIO DIREZIONE FLUIDO IN RAFFREDDAMENTO Fig. 13 UNICO 8500 - 11000 BTU HP TUBO DI SERVIZIO...
- Page 13 Operations on refrigeration circuits Figure 14, shows how a joint is made between two copper pipes by brazing. As can be seen, a dimple of about 2/3 the If it should be necessary to operate on the refrigeration circuit diameter of the pipe has been made in one of the pipes which due to possible leakage of coolant or to replace parts, the on which the other is fitted.
- Page 14 discharging it, obviously, from the exhaust pipe. f) For the same reasons indicated above, also replace the filter with molecular screen located near the capillary. g) Clean the pipe connections to remove any residues of alloy. h) Position the new compressor and heat the pipes, always taking care to heat the connectors rather than the pipes.
- Page 15 indicated on the label of technical data, to compensate for any accumulation of coolant in the connecting hose and any small leaks during the operation of disconnection from the service valve. After detaching the hose, clamp the service hose in at least two points upstream of the perforation valve, leaving the hose clamping tool tight on the pipe (see fig.
- Page 16 The symbols for dehumidifying will appear on the remote after every variation, the speed remains constant for at control with the set temperature that the system acquires from least 5 min., to prevent annoying oscillations. this function being switched on. If 21+Tamb+23°C the machine provides ventilation only, The user can change the set value thereby resetting the whole at minimum speed.
- Page 17 (filter): off = UNICO; on = UNICO HP (with heat pump); When the air conditioner functions in heating mode, the green led (compr.): off = with correction of room temperature; condensation that forms on the external battery (evaporator) on = without correction of room temperature;...
- Page 18 The end of the autotest is signalled by all the leds lighting up during the heating function. The possible causes are: together ten times in a row, and emission of an acoustic signal. Internal air filter clogged. During this stage, the value of the temperature read by the Internal battery dirty.
- Page 19 CF/RL alarm developed by us. (minimum battery temperature not reached) When this signal appears it means that the internal or external TSF alarms battery have not reached a temperature sufficient for normal (temperature sensors short circuited or interrupted) operation of the machine. The main causes are: When these alarms occur it is necessary to check that the Compressor blocked or burnt;...
- Page 20 Tables of output Since not always the external and internal project conditions are identical to those to which the nominal output of the machines refer, sometimes the choice of the machines on the basis of the nominal outputs can turn out to be not entirely correct.
- Page 21 Tables and performance curves for UNICO Cooling: model UNICO 8.5 SF ° Temperatures Outside temperature ° Inside. 20°C 26°C 32°C 35°C 40°C 43°C B.S. B.U. 2,21 0,69 2,12 0,71 2,06 0,76 1,96 1,67 0,87 1,57 0,88 2,32 0,71 2,22 0,73...
- Page 22 Description of UNICO configuration parameters PARAM U.M. DESCRIPTION °C tc_camb correction of room temperature °C tc_hs1 temperature of hot start (internal battery) °C tc_hs2 temperature of hot stop (internal battery) °C t_spscon minimum time for start of pump to eliminate condensation...
- Page 23 Wiring diagrams...
- Page 24 Dimensions LUNGHEZZA MASSIMA DEI TUBI RETTILINEI 1 mt...
- Page 25 Assembly template...
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