035-20401-001 Rev. A (0904)
22
Unitary Products Group
NOTES
Страница 1: ...ractices and hazards involving only property dam age Improper installation may create a condition where the operation of the product could cause personal injury or property damage Improper installatio...
Страница 2: ...topped ground area the unit should be raised sufficiently above the roof or ground to avoid taking the accumulated layer of hot air into the outdoor unit Provide an adequate structural support ADD ON...
Страница 3: ...a line will result in loss of capacity and other problems caused by insufficient refrigerant flow Slope horizontal vapor lines at least 1 every 20 feet toward the out door unit to facilitate proper oi...
Страница 4: ...tem from the vapor service port connection After this con nection has cooled remove the nitrogen source from the liquid fit ting service port 7 Replace the Schrader core in the liquid and vapor valves...
Страница 5: ...a vertical run the bulb should be located at least 16 inches from any bend and on the tub ing sides opposite the plane of the bend The bulb should be positioned with the bulb tail at the top so that t...
Страница 6: ...hat a mini mum air flow of 325 cfm ton be supplied at all times CFM SELECTION BOARD SETTINGS For proper system operation the CFM Selection Board jumpers must be set properly Refer to the Tabular Data...
Страница 7: ...operation the unit must be evacuated and charge weighed in per the marking on the rating plate For the cooling operation the recommended subcooling is typically around 10 F This may vary greatly base...
Страница 8: ...ys that are already energized but will not energize any additional relays until the voltage level increases If the voltage drops below approximately 16 VAC the control will imme diately de energize th...
Страница 9: ...not be displayed when a fault code is present During the following conditions the control will not energize the X L out put FAULT CODE DISPLAY X L Output The X L terminal of the heat pump control is...
Страница 10: ...ored fault codes from the control s memory This practice will enable better troubleshooting and diagnosis of system problems If the stored fault codes are not cleared after the cause of the problem ha...
Страница 11: ...be removed and reapplied When the hard lockout condition is reset the control will de energize the LED and X L outputs and respond to thermostat inputs normally Wiring or Setting Related Lockouts The...
Страница 12: ...ing cycle The control will initiate a defrost cycle every 6 hours accumulated com pressor run time to recirculate refrigerant lubricants This forced defrost timer will be reset and restarted following...
Страница 13: ...es Recycling 24VAC to the control Shorting the TEST input pins If the Y2 LOCK jumper is in the OFF position the control will not imple ment second stage anticipation mode This results in second stage...
Страница 14: ...uid line temperature Therefore if the control energizes Y2 OUT because the outdoor ambient temperature is greater than or equal to 50F or because the liquid line temperature exceeds the curve for the...
Страница 15: ...ode If the other exit conditions are met while the unit is in defrost mode the control will complete the defrost cycle and then exit the forced second stage feature During defrost operation the contro...
Страница 16: ...re 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 heat under som...
Страница 17: ...t the control will 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...
Страница 18: ...this document for detailed information The Y2 Lock jumper on the control is shown in figures 11 14 The fac tory places the Y2 Lock jumper in the ON position If the jumper is removed the control will...
Страница 19: ...When applicable instruct the owner that the compressor is equipped with a crankcase heater to prevent the migration of refrigerant to the compressor during the OFF cycle The heater is energized only...
Страница 20: ...404 11 105 412 6 416 9 426 12 431 11 110 441 7 445 9 454 12 458 11 115 471 8 475 10 482 12 487 11 120 503 9 507 10 512 11 516 11 125 536 10 540 10 543 11 546 10 TABLE 15 15Z48HP Subcooling Charging C...
Страница 21: ...035 20401 001 Rev A 0904 Unitary Products Group 21 SECTION X WIRING DIAGRAM FIGURE 15 Wiring Diagram...
Страница 22: ...035 20401 001 Rev A 0904 22 Unitary Products Group NOTES...
Страница 23: ...035 20401 001 Rev A 0904 Unitary Products Group 23...
Страница 24: ...ct to change without notice Printed in U S A 035 20401 001 Rev A 0904 Copyright by York International Corp 2004 All rights reserved Supersedes Nothing Unitary 5005 Norman Product York OK Group Drive 7...
