Évaluations - 2, GPA: 3 ( )

Fabricant : Bard Taille : 280.08 kb Nom Fichier : 37604cb9-3a29-458e-853c-f75a986ab74f.pdf Langue d'enseignement:

Recycling the wall thermostat resets the manual lockout. Low Pressure Switch, Bypass, and Lockout Sequence If the low pressure switch opens for more than 120 seconds, the compressor contactor will de-energize and go into a soft lockout. Regardless the state of the low pressure switch, the contactor will reenergize after the delay on make time delay has expired. If the low pressure switch remains open, or opens again for longer than 120 seconds the unit will go into manual lockout condition and the alarm relay circuit will energize. Recycling the wall thermostat resets the manual lockout. Alarm Relay Output Alarm terminal is output connection for applications where alarm relay is employed. This terminal is powered whenever compressor is locked out due to HPC or LPC sequences as described. NOTE: Both high and low pressure switch controls are inherently automatic reset devices. The high pressure switch and low pressure switch cut out and cut in settings are fixed by specific air conditioner or heat pump unit model. The lockout features, both soft and manual, are a function of the Compressor Control Module. ADJUSTMENTS Adjustable Delay on Make and Delay on Break Timer The potentiometer is used to select Delay on Break time from 30 seconds to 5 minutes. Delay on Make (DOM) timing on power-up and after power interruptions is equal to 2 minutes plus 10% of Delay on Break (DOB) setting: 0.5 minute (30 seconds) DOB = 123 second DOM 1.0 minute (60 seconds) DOB = 126 second DOM 2.0 minute (120 seconds) DOB = 132 second DOM 3.0 minute (180 seconds) DOB = 138 second DOM 4.0 minute (240 seconds) DOB = 144 second DOM 5.0 minute (300 seconds) DOB = 150 second DOM During routine operation of the unit with no power interruptions the compressor will operate on demand with no delay. Typical Settings for Dual Unit Installation: Unit 1: DOB set at 2 minutes, and DOM is 132 seconds. Unit 2: DOB set at 4 minutes, and DOM is 144 seconds. PHASE MONITOR All units with three phase scroll compressors are equipped with a 3 phase line monitor to prevent compressor damage due to phase reversal. The phase monitor in this unit is equipped with two LEDs. If the Y signal is present at the phase monitor and phases are correct the green LED will light. If phases are reversed, the red fault LED will be lit and compressor operation is inhibited. If a fault condition occurs, reverse two of the supply leads to the unit. Do not reverse any of the unit factory wires as damage may occur. PRESSURE SERVICE PORTS High and low pressure service ports are installed on all units so that the system operating pressures can be observed. A pressure table can be found later in the manual covering all models. It is imperative to match the correct pressure table to the unit by model number. Manual 2100-351 Page 16 TROUBLESHOOTING FAN BLADE SETTING DIMENSIONS REFRIGERANT CHARGE Shown in Figure 10 is the correct fan blade setting dimension for proper air delivery across the outdoor coil. Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions below be checked and blade adjusted in or out on the motor shaft accordingly. FIGURE 10 TABLE 5 Dimension Model A WL602N 1.75 REMOVAL OF FAN SHROUD 1. Disconnect all power to the unit. 2. Remove the screws holding both grilles, one on each side of unit, and remove grilles. 3. Remove screws holding fan shroud to condenser and bottom. Nine (9) screws. 4. Unwire condenser fan motor. 5. Slide complete motor, fan blade, and shroud assembly out the left side of the unit. 6. Service motor/fan as needed. 7. Reverse steps to reinstall. The correct system R-22 charge is shown on the unit rating plate. Optimum unit performance will occur with a refrigerant charge resulting in a suction line temperature (6” from compressor) as shown in Table 7. TABLE 7 REFRIGERANT CHARGE 95 OD 82 OD Model Airflow Temperature Temperature WL602 1700 53 -55 60 -62 WL482 1550 54 -56 65 -67 The suction line temperatures in table above are based upon 80° F dry bulb / 67° F wet bulb (50% R.H.) temperature and rated airflow across the evaporator during cooling cycle. TABLE 8 RATED CFM AND ESP Model Rated CFM Rated ESP Recommended Airflow Range WL602N 1425 0.20 1775 -1425 . WL6023 1425 0.20 1775 -1425 . WL6022 1525 0.20 1850 -1525 . WL4823 1350 0.20 1600 -1350 . WL4822 1400 0.20 1700 -1400 . . Rated CFM & ESP on High Speed tap with 14 x 28 return air filter grille . Rated CFM & ESP on High Speed tap with 20 x 30 filter TABLE 6 INDOOR BLOWER PERFORMANCE CFM @ 230V E.S.P. In H2O WL602N WL6023 WL6022 WL4823 WL4822 High Speed High Speed High Speed High Speed Dry Coil Wet Coil Dry Coil Wet Coil Dry Coil Wet Coil Dry Coil Wet Coil .0 .1 .2 1775 1675 1575 1600 1525 1425 1850 1755 1700 1675 16001525 1600 1525 1425 1525 1425 1350 1700 1600 1475 1625 1525 1400 Manual 2100-351 Page 17 TABLE 9 MAXIMUM ESP OF OPERATION ELECTRIC HEAT ONLY MODELS ESP A05 .4 WL6023 ONLY A10 .3 B09 .3 Values shown are for units equipped with sta...

Téléchargez votre

Pour télécharger, entrez 2 chiffres :