OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 OUTDOOR MONOBLOC AIR CONDITIONING UNIT FOR INSTALLATION ON SHELTERS AND PRE-FABRICATED BUILDINGS WMA/WMF 0121- 0181 - 0251 - 0281 - 0331 0551 - 0661 OPERATION AND MAINTENANCE MANUAL GB © UNIFLAIR 2000 Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 Before installing or working on the unit, read this instruction manual carefully. Follow all instructions and safety procedures contained in this manual and displayed on the unit Some characteristics of special versions of these units may differ from those described in this manual. UNIFLAIR ITALIA S.r.l. Via dell’Industria, 10 35020 BRUGINE (Padova) Italy Tel. +39 (0)49 9713211 Fax. +39 (0)49 5806906 Internet: www.UNIFLAIR.com E-Mail: info@UNIFLAIR.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 Contents Page GENERAL DESCRIPTION Documentation enclosed with the unit Description of the unit and intended use Function limits Description of main components Accessories Function principles Free-cooling system Data plate 4 4 4 5 5 6 7 7 10 START-UP AND TESTING Start-up procedure 11 11 FUNCTION & REGULATION Microprocessor control Management of two units Measurement and alarm devices Regulation of condensation pressure Setting the regulation and s
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 Family W: wall mounted W Unit type Function mode M: monobloc M Model Number of Compressors F: mech.+ free. cooling A: mech.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 FUNCTION LIMITS T room air Only if the condenser is fitted with the RVC/e speed regulator T i = 40 °C T i = 35 °C T i = 19 °C T outside air T e = 18 °C T e = 45 °C T e = 47 °C MODELS WM 0551-0661 DESCRIPTION OF MAIN COMPONENTS SELF-SUPPORTING FRAME in 1.2 mm galvanised steel EXTERNAL PANELS in 1.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 ACCESSORIES The following optional accessories can be added to the basic version of the unit: RVC/e: condenser fan speed regulation with SPC pressure sensor USER TERMINAL for the setting and display of unit function parameters; to special order the terminal can be housed inside the unit’s electrical panel on a hinged plate or a wall fitting kit can be supplied for remote installation CLOCK CIRCUIT for the management of time and date events LAN BOARD
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 FUNCTION PRINCIPLES (basic version – mechanical cooling) Air from the room is taken in by the recirculating fan through opening (I), cooled by the evaporator coil and delivered into the room through opening (M). In “T” versions, the air may be heated by the electric elements (H) before being delivered into the room. H M I Fig.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 MINIMUM QUANTITY OF FRESH AIR It is possible to pre-set a minimum opening position on the damper to allow the introduction of a proportion of fresh air in any operating mode. E Q.E. MVE F S CP MVC (a) (b) (c) MODELS WMF 0121-0181-0251-0281-0331 Fig. 2 MVE E Q.E F S CP MVC (a) (b) (c) MODELS WMF 0551-0661 Fig. 3 8 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 INTELLIGENT FREE-COOLING This system gives dynamic control of the free-cooling phase, maximising energy-saving performance at all times. The result is the ability to provide much greater energy saving (and therefore economy of operation) than the common fixed-point free-cooling systems.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 DATA PLATE The data plate is in the electrical panel housing and shows: - Unit model and serial number - Power supply (voltage, number of phases and frequency) - Power absorption of the unit and of the main components - Current absorption of the unit and of the main components: - OA (Operating current) - FLA (Full load current) - LRA (Locked rotor current) - Setting values of the refrigerant circuit pressostats (HP and LP) and of the other regulation
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 START-UP AND TESTING START-UP PROCEDURE Having connected the power supply cables to the IG main switch as described in the Installation Manual, switch on the power supply to the unit electrical panel. 1. - Arm the IM automatic switch 2. - (in units with double power supply) arm automatic auxiliary switch IM2 (230V/1N/50Hz from UPS) 3. - Move the main switch IG to the on position “I” 4.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 FUNCTION AND REGULATION MICROPROCESSOR CONTROL (see mP20 microprocessor control instruction manual) The control board provides the following functions: • Control of room temperature • Display of room relative humidity (with optional temperature and humidity sensor) • Maximum room humidity setting which, when reached, closes the free-cooling damper and forces compressor start-up (with optional humidity sensor) • Management of electrical re-heat (optio
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 MEASUREMENT AND ALARM DEVICES The safety and regulation functions of the unit are performed by the microprocessor control. The unit is equipped with the following temperature, humidity and pressure sensors, as shown in the figure below: RVC/e. Modulates condenser fan speed to control condensation pressure (optional). TSR. Electric heating element safety thermostat with re-set button under the coil; SM. Delivery air temperature sensor; SE.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 SE SM TSR RVC/e ST FS PFS AP SPC BP BACK OF UNIT Fig. 5.b. MODELS WM* 0551-0661 REGULATION OF CONDENSATION PRESSURE Standard units are fitted with an On/Off pressostat. As an alternative, condensation pressure can be controlled by a TRIAC voltage regulator on the condenser fan power supply.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 Some special units can be fitted with an RVC/p pressostatic speed regulator which is not controlled by the microprocessor. Maximum speed: 100% RVC/p OFF PROPORTIONAL BAND p. MIN (default: 17bar) p. COND p.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 SETTING THE AIRFLOW SENSOR The FS differential pressostat should intervene if the fan is not working (if the unit has one fan only) or if one of the fans is not working (in the case of multiple fans). The setting of the airflow differential pressostat is 1.0 mbar (100 Pa).
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 TECHNICAL DATA GENERAL CHARACTERISTICS This information refers to standard models and may vary for special or modified units. MODELLO POTENZA FRIGORIFERA- R22 Raffreddamento Meccanico Ambiente: 26 °C, 40%UR;Text=35°C Resa frigorifera totale Resa frigorifera sensibile POTENZA FRIGORIFERA Raffreddamento in free-cooling Ambiente a 26 °C- Text=14°C Sensibile 0121 kW kW kW 4.1 4.1 5.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 MODELLO POTENZA FRIGORIFERA – R22 Raffreddamento Meccanico Ambiente a 26 °C- 40%URText=35°C Resa frigorifera totale Resa frigorifera sensibile WMF0551 MODEL WMF0661 COOLING CAPACITY – R22 Mechanical cooling Room at 26 °C- 40%RH- Text=35°C kW kW 15.8 15.8 17.5 17.5 kW kW POTENZA FRIGORIFERA Raffreddamento in free-cooling Ambiente a 26 °C- Text=14°C Sensibile kW 17.4 17.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 AIR FLOW RECIRCULATION (1) MODEL Nominal air flow @ 0 Pa Air flow @ 50 Pa Air flow @ 100 Pa Air flow @ 150 Pa l/s m³/h l/s m³/h l/s m³/h l/s m³/h MODEL Nominal air flow @ 0 Pa Air flow @ 50 Pa Air flow @ 100 Pa Air flow @ 150 Pa l/s m³/h l/s m³/h l/s m³/h l/s m³/h WM∗ ∗0121 WM∗ ∗0181 WM∗ ∗0251 WM∗ ∗0281 WM∗ ∗0331 344 1240 308 1110 267 960 214 770 406 1460 372 1340 333 1200 286 1030 622 2240 556 2000 478 1720 381 1370 622 2240 556 2000 478
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 ELECTRICAL CHARACTERISTICS UNIT COMPONENTS COMPONENTI DELL’UNITÁ COMPRESSORE COMPRESSOR C 50 Hz VENTILATORI sez. RICIRCOLO RADIAL FANS MVE VOLT No. LRA VOLT No. kW OA FLA LRA WM∗ ∗ 0121 WM∗ ∗ 0181 WM∗ ∗ 0251 WM∗ ∗ 0281 230/1ph/50 230/1ph/50 230/1ph/50 230/1ph/50 1 1 1 1 0.94 1.53 1.90 2.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 MAINTENANCE REGULAR CHECKS The following maintenance operations should be done regularly: • • • • • • • • • • • check the set values of the control and regulation devices check that room conditions on the mP20/W terminal display are normal check normal condensation and evaporation pressures or saturated temperatures check the refrigerant charge; the sight glass should be clear (however the presence of a few bubbles is normal check the correct funct
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 CLEANING THE FRESH AIR PRE-FILTRER (only in units with free-cooling option) To ensure sufficient flow of fresh air the metal pre-filter on the front air intake must be cleaned regularly, especially during the cooler seasons when free-cooling is used more often. Free the pre-filter (F) from the air intake (N) and clean it using compressed air or water and detergent. The free-cooling function should not be used without the pre-filter installed.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 CHANGING THE ELECTRIC HEATING ELEMENTS (models WM* 0551-0661) The heater elements are in front of the MVE radial fan: for access, remove the top front panel of the unit and the safety cover. IMPORTANT: before working on the electric heating element, switch off the power supply by moving the main switch to the OFF position (O) and wait for the element to cool.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 The charge must be done under room conditions and with a discharge pressure of around 18 bar (equivalent to a saturation temperature of 48°C for R22). Check that the super-cooling of the liquid at the intake of the thermostatic valve is between 3 and 5°C less than the condensation temperature reading on the manometer scale and that the superheating of the vapour at the evaporator output is around 5-8°C.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 PROBLEM SOLVING Identifying and solving problems is made easier by the microprocessor control which, in the event of an alarm: • activates the alarm relay as well as the red LED and buzzer on the user terminal • displays an alarm condition on the user terminal • describes, via the appropriate routine, the nature of the alarm and the possible solution.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 TEMPERATURE CONTROL PROBLEM POSSIBLE CAUSE CHECK / REMEDY ROOM TEMPERATURE TOO HIGH The parameter settings on the control panel are not correct Lack of air flow. The compressor does not work when called by the control panel. Insufficient compressor output Check the room temperature setting; see control panel instruction manual. See ”Lack Of Air Flow”. See ”The Compressor Does Not Work”.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 FANS PROBLEM LACK OF AIRFLOW POSSIBLE CAUSE A) No power to the fans B) The filters are dirty C) The airflow is obstructed D) Intervention of fan protection. CHECK / REMEDY Check power supply to the fan motors Shake dust out of the cartridge and clean with a vacuum cleaner. Change filter if blocked. Check correct setting of the dirty filter pressostat. Read the section on Air Distribution thermal Check the resistance of the fan windings.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 REFRIGERANT CIRCUIT PROBLEM HIGH COMPRESSOR INTAKE PRESSURE POSSIBLE CAUSE CHECK/REMEDY A) Heat Load greater than expected. B) Airflow pressure too high. C) Circuit refrigerant overload D)Return of liquid refrigerant compressor intake. LOW COMPRESSOR INTAKE PRESSURE (and formation of frost in the coil) to A) Room temperature is too low. See “ROOM TEMPERATURE IS TOO LOW”. B) Air flow is too low or absent. C) Refrigerant filter is blocked.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 COMPRESSOR PROBLEM THE COMPRESSOR DOES NOT WORK POSSIBLE CAUSE CHECK/REMEDY A) Protection device against short circuit is Restore the magnetic switch lever; check cause of switched on. the short circuit. Before restarting the compressor check the. heating element and the winding continuity of the motor. B)The internal protection of the compressor see ‘COMPRESSOR INTERNAL PROTECTION is switched on. DEVICE SWITCHES ON’ C) The contactor doesn’t work.
OPERATION AND MAINTENANCE MANUAL Wall Mounted 0121…0661 FREE COOLING SYSTEM PROBLEM FREE-COOLING CYCLE DOES NOT START POSSIBLE CAUSE CHECK/REMEDY A) The servomotor damper doesn’t work. Check the electrical of the and if it is necessary to replace or repare the motor. B) Control system setting is not correct. C) The control system doesn’t work. Check the setting of the control system. Check the functioning of the sensors. Cfr. mP20/W instruction manual.
