The purpose of this publication is to provide service technicians with the general knowledge necessary to proper ly charge a Heat Pump system or an Air Conditioning s ystem. This manual outlines, in detail, recommended charging pr ocedures to be followed on all capillary tube and expansion valve systems. Before any of the procedure s outlined in this manual can be initiated the service techn ician must have all the necessary tools a s listed under equipment on page 4. In addition to tools proper airflow must be verified pr ior to any attempt to charge a system. The system should be checked to c onfirm that all air filters are clean, that the blower assembly and coil are free of dirt an d that the duct system is adequate. If proper airflow is not available all associated problems must be corrected prior to attempting any charging procedure.
Cooling performance can be checked when outdoor temperature is above 75. Latest honda cg 125 manual. Effective July 1, 1992, it shall be unlawful for any per son, in the course of maintaining, servicing, repairing, or disposing of an air conditioning system, to knowingly vent or release any CFC or HCFC refrigerant.
Minimal releases (air purges of refrigerant hoses) associated with good faith attempts to recapture or recyc le are exempt from the ban on venting. The Clean Air Act has provisions for significant fines and/or imprisonment for non- compliance. These fines could rang e from $5,000 to $25,000 per day.
Refrigerant System C harging. 2 Service T ools — Equ ipment.
2 Metering Devices. 3 Cooling Systems. 4 Heat Pump Systems.
5 Equipment Pressure T aps (General). 6 Charging Capillary T ube/FCCV – Cooling Mode Onl y. 7 Example Slide Rule Calculation. 8 Performance – Cooling M ode.
9 Charging and Performance – Cooling Mode. 10 Charging By Subcooling – Cooling Mode. 11 Performance – Heating Mode. 12 Charging – Heating Mode. 13 Charging By Wei ght. 15 Calibrating Pressure Gauges. 16 Refrigerant 410A Background.
17 Characteristics. 17 Refrigerant Safety.
18 Application Notes. 19 System Charging Using R410A.
20 R-410A Temperat ure and Pressure Chart. 21 Subcooling T able. 22 R-410A Split Cooling Units Only. 24 R-410A Split Heat Pump Units Only. 25 R-410A Charging and Performance – Cooling Mode. 26 R-410A Charging – Heating Mode – R-410A. These procedures sh ould be followed at initial start-up and at anytime the power has been re moved for 12 hours or more.
T o prevent compressor damage whic h may result from the presence of LIQUID refrigerant in the crankcase: 1. Make certai n the room thermosta t is in “off” position. (Th e compressor is not to operate. Apply powe r by closing the system disconn ect switch. Thi s energizes the compre ssor heater which evaporates the liquid refrigeran t in the crankcase. Allow 30 minutes for each poun d of refrigerant in the system as noted on the unit nameplate.
American Standard Air Conditioner Troubleshooting
After prope r elapsed tim e the thermos tat may be set to operat e the compresso r. Except as required for safe ty while servici ng – DO NOT OPEN SYSTEM DISCON NECT SWITC H.