WEIGH−IN CHARGING
CALCULATING SYSTEM CHARGE FOR OUTDOOR UNIT VOID OF CHARGE
If the system is void of refrigerant, first, locate and repair any leaks and then weigh in the refrigerant charge into the unit. To calculate the total refriger- | |||||||||||
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Amount specified on | Adjust amount. for variation in line set | match indoor air handler or coil | Total Charge | ||||||||
| nameplate | length listed on line set length table below. | listed in table 3. |
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Refrigerant Charge per Line Set Length
LIQUID LINE SET DIAMETER
3/8" (9.5 MM)
OUNCES PER 5 FEET (GRAMS PER 1.5 METERS) ADJUST FROM 15 FEET (4.6 METERS) LINE SET*
3 OUNCE PER 5’ (85 GRAMS PER 1.5 M)
*If line length is greater than 15 feet (4.6 meters), add this amount. If line length is less than 15 feet (4.6 meters), subtract this amount.
NOTE | emperature |
of the liquid line or when pressure drop is equal to or greater than 20 psig. |
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NOTE . Go to actual nameplate on outdoor unit for charge information.
Figure 18. Using HFC−410A Weigh In Method
OUTDOOR UNIT | DISTRIBUTOR |
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| NOTE − ARROWS INDICATE DIRECTION | |
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| OF REFRIGERANT FLOW |
| REVERSING VALVE | |
CHECK / EXPANSION |
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VALVE |
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| OUTDOOR |
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| COIL |
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BI−FLOW FILTER / DRIER |
| INDOOR UNIT |
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| MUFFLER |
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| TRUE SUCTION | VAPOR |
| PORT | |
| SERVICE | |
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| PORT |
LIQUID LINE | COMPRESSOR |
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SERVICE PORT |
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| CHECK / EXPANSION VALVE |
INDOOR
NOTE − Use gauge ports on vapor line valve and liquid valve for evacuating refrigerant lines andCOIL indoor coil. Use true suction port to measure vapor pressure during charging.
Figure 19. Heat Pump Cooling Cycle
Page 23
XP13 SERIES
