Assessments - 2, GPA: 4 ( )

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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. Manual 2100-425 Page 15 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 =132second DOM 3.0 minute (180 seconds)DOB =138second DOM 4.0 minute (240 seconds)DOB =144second DOM 5.0 minute (300 seconds)DOB =150second 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. Pressure tables 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 2100-425 Page 16 TROUBLESHOOTING FAN BLADE SETTING DIMENSIONS Shown in the drawing below are the correct fan blade setting dimensions 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 FAN BLADE SETTING TABLE 7 FAN BLADE DIMENSIONS Model Dimension A WA611 WA70 1.25 WA721 .75 REMOVAL OF FAN SHROUD 1. Disconnect all power to unit. 2. Remove the screws holding both grills – one on each side of unit – and remove grills. 3. Remove screws holding fan shroud to condenser and bottom – (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. REFRIGERANT CHARGE 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 inches from compressor) as shown in Table 8: TABLE 8 SUCTION LINE TEMPERATURES Models Rated Airflow F95° OD Temp. F82° OD Temp. WA611 1,350 54-52 60-57 WA70 1,800 60-58 58-56 WA721 1,800 61-59 59-57 The suction line temperatures in Table 8 are based upon 80.F dry bulb / 67.F wet bulb (50 percent R.H.) temperature and rated airflow across the evaporator during cooling cycle. TABLE 9 CFM and ESP Rated Model • Rated CFM • Rated ESP Recommended Air Flow Range WA611 1,350 .20 1,100-1,47 5 WA70 1,800 .20 1,375-2,00 0 WA721 1,800 .20 1,475-2,00 0 . Rated CFM and ESP on high speed tap. TABLE 10 INDOOR BLOWER PERFORMANCE – CFM AT 230 VOLTS E.S.P. In H2O WA611 WA70 WA721 High Speed Medium Speed • High Speed Low Speed Dry Coil Wet Coil Dry Coil Wet Coil Dry Coil Wet Coil Dry Coil Wet Coil .0 1,700 1,575 1,425 1,375 2,200 2,000 1,600 1,450 .1 1,550 1,475 1,375 1,250 2,100 1,900 1,525 1,375 .2 1,400 1,350 1,250 1,100 2,000 1,800 ---- . 3 1,250 1,150 1,100 --1,87 5 1,700 ---- . 4 ---- -- -- 1,77 5 1,600 ---- . 5 ---- -- -- 1,65 0 1,475 ---- . This model has 3-speed motor, but low speed cannot be used. Manual 2100-425 Page 17 TABLE 11 MAXIMUM ESP OF OPERATION ELECTRIC HEAT ONLY Model WA611 WA70 WA721 Speed KW Medium Speed High Speed Low Speed High Speed Low Speed High Speed -A05 .30 .30 .50 .50 ---- -A0 8 .30 .30 ---- -- -- -A1 0 .30 .30 .50 .50 ---- -A2 0 .30 .30 .40 .5...

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