Unitary products group HC3A Series Installation Manual Download Page 20

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Subject to change without notice. Printed in U.S.A.

170761-UIM-B-0406

Supersedes: 170761-UIM-A-0106

Unitary

5005

Norman

Product

York

Group

Drive

73069

SECTION X: WIRING DIAGRAM

FIGURE 13: Wiring Diagram

Summary of Contents for HC3A Series

Page 1: ...r moderate injury It is also used to alert against unsafe practices and hazards involving only property dam age Improper installation may create a condition where the operation of the product could ca...

Page 2: ...or burnout then installation of a 100 activated alumina suction line filter drier is required in addition to the factory installed liquid line drier Operate the system for 10 hours Monitor the suction...

Page 3: ...oor unit is above the indoor coil oil trapping is necessary An oil trap should be provided for every 20 ft of rise See Figure 2 PRECAUTIONS DURING LINE INSTALLATION 1 Install the lines with as few ben...

Page 4: ...5 Slide the grommet away from the vapor connection at the indoor coil Braze the vapor line to the evaporator vapor connection After the connection has cooled slide the grommet back into original posi...

Page 5: ...rous copper alloy material such as Silfos 5 or equivalent DO NOT use soft solder Install the TXV bulb to the vapor line near the equalizer line using the two bulb clamps furnished with the TXV assembl...

Page 6: ...posed glass or appliances drafts from outside doors or supply air grilles 5 Route the 24 volt control wiring NEC Class 2 from the outdoor unit to the indoor unit and thermostat NOTE To eliminate errat...

Page 7: ...rated charging cylinder or accurate weighing device is avail able add refrigerant accordingly Otherwise model specific charging charts are provided in Tables 12 18 for cooling mode only There is no ac...

Page 8: ...5 212 105 242 115 94 56 124 71 154 84 184 96 214 106 244 115 96 57 126 72 156 85 186 97 216 107 246 116 98 58 128 73 158 86 188 97 218 107 248 117 100 59 130 74 160 87 190 98 220 108 250 117 102 60 13...

Page 9: ...isplay various types of diagnostic information LED1 is red and LED2 is green The location of the LED s is shown in Figures 10 and 13 These LED s are used to display opera tional mode status and fault...

Page 10: ...een is not energized These faults typically occur when the heat pump has been operating and a problem occurs Sensor or Switch Fault Codes Table 7 shows the faults that the control can detect when a pr...

Page 11: ...riptions of the conditions required for the control to enter the soft lockout mode are contained in other sections of this document 1 High pressure switch a Two openings within six hours 2 Low pressur...

Page 12: ...t has been forced using the TEST inputs It will also display the active defrost curve using the X L terminal when the operational mode is being displayed using the LED s For instance the X L output wi...

Page 13: ...nnected to the indoor unit The SWITCH POINT jumper on the control has no effect on the opera tion of the heat pump The control implements the Hot Heat Pump Mode by controlling the indoor airflow level...

Page 14: ...low because of the Y1 signal being delivered to the Y1 input of the indoor unit When the ten minute timer expires the control will compare the liquid line temperature to the indoor airflow control cur...

Page 15: ...ent temperature is greater than the bal ance point setting the control will not energize the auxiliary heat out puts However the control shall ignore the balance point setting and energize auxiliary h...

Page 16: ...l de energize the compressor outputs and energize W1 Out and W2 Out immediately Table 11 describes the auxiliary heat operation for fossil fuel mode Bonnet Sensor Fossil Fuel Mode The heat pump may be...

Page 17: ...time If the control senses another opening of the high pressure switch before the timer expires it will cause a soft lockout condition The second opening of the high pressure switch must be greater t...

Page 18: ...and assure proper drainage IT IS UNLAWFUL TO KNOWINGLY VENT RELEASE OR DIS CHARGE REFRIGERANT INTO THE OPEN AIR DURING REPAIR SERVICE MAINTENANCE OR THE FINAL DIS POSAL OF THIS UNIT WHEN THE SYSTEM IS...

Page 19: ...11 269 11 110 286 11 287 11 286 11 288 11 115 305 11 306 11 305 11 307 11 120 324 10 326 11 324 11 326 11 125 344 10 345 10 343 11 346 11 TABLE 17 4 Ton Subcooling Charging Chart Outdoor Ambient Indo...

Page 20: ...e Printed in U S A 170761 UIM B 0406 Copyright by York International Corp 2006 All rights reserved Supersedes 170761 UIM A 0106 Unitary 5005 Norman Product York OK Group Drive 73069 SECTION X WIRING D...