Assessments - 2, GPA: 3 ( )

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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. 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 2100-426 Page 14 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 WL70 1.25 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 INDOOR BLOWER PERFORMANCE CFM AT 230 V E.S.P. WL70 High Speed Low Speed In H2O Dry Coil Wet Coil Dry Coil Wet Coil .0 2,200 2,000 1,600 1,450 .1 2,100 1,900 1,525 1,375 .2 2,000 1,800 ---- . 3 1,875 1,700 ---- . 4 1,775 1,600 ---- . 5 1,650 1,475 ---- REMOVAL OF FAN SHROUD 1. Disconnect all power to unit. TABLE 10 2. Remove the screws holding both grills – one on CFM AND ESP each side of unit – and remove grills. 3. Remove screws holding fan shroud to condenser and bottom – (9) screws. 4. Unwire condenser fan motor. Rated Rated Recommended Air Flow Model CFM ESP Range WL70 1,800 .20 2,000 --1,375 5. Slide complete motor, fan blade, and shroud . Rated CFM and ESP on high speed tap. assembly out the left side of the unit. 6. Service motor/fan as needed. 7. Reverse steps to reinstall. TABLE 11 MAXIMUM ESP OF OPERATION REFRIGERANT CHARGE ELECTRIC HEAT ONLY 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 the following table: TABLE 8 SUCTION LINE TEMPERATURES Model WL70 Speed KW Low Speed High Speed -A00 -A05 -A10 .50 .50 .50 .50 .50 -B00 .50 .50 -B09 .50 .50 -B15 .50 .50 -C09 .50 .50 -C15 .50 .50 • 11111 Rated F95° F82° Models Airflow OD Temp. OD Temp. WL70 1,800 60-58 58-56 Manual 2100-426 Page 15 TABLE 12 COOLING PRESSURE – (ALL TEMPERATURES °F) Model Return Air Temp. Pressure 75 80 85 90 95 100 105 110 115 WL702-A 75 DB 62 WB Low Side High Side 68 215 68 228 69 242 70 256 71 272 72 289 73 305 74 324 75 343 80 DB 67 WB Low Side High Side 73 220 73 234 74 248 75 263 76 279 77 296 78 313 79 332 80 352 85 DB 72 WB Low Side High Side 76 228 76 242 77 257 78 272 79 289 80 306 81 324 82 344 83 364 WL701-B,-C 75 DB 62 WB Low Side High Side 62 214 63 230 64 247 65 265 66 280 67 299 68 316 69 333 70 351 80 DB 67 WB Low Side High Side 67 220 68 236 69 254 70 271 71 287 72 306 73 324 74 342 75 360 85 DB 72 WB Low Side High Side 72 225 73 243 74 261 75 279 76 297 77 316 78 335 79 353 80 372 Low side pressure ± 2 psig High side pressure ± 5 psig Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge being in the system, the charge should be removed, system evacuated and recharged to serial plate instruction. TABLE 13 OPTIONAL ACCESSORIES MODEL DESCRIPTION WL702-AWL701-BWL701-C EHWA05-A05L Heater Package X EHWA10-A10L Heater Package X EHWA15-A15L Heater Package X EHWA05-B09L Heater Package X EHWA05-B15L Heater Package X EHWA05A-C09L Heater Package X EHWA05A-C15L Heater Package X BOP-5 Blank Off Plate X X X BFAD-5 Barometric Fresh Air Damper X X X MFAD-5 Motorized Fresh Air Damper X X X CRV-5 Classroom Ventilator with Exhaust X X X EIFM-5 Economizer with Exhaust X X X WERV-A5A Energy R...

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