Purpose: To accurately check the pressure setting of mechanical throttling valves. Test Procedure 1. Obtain the recommended setting from current Service Bulletins or the unit…

Purpose: This field test determines whether a unit is performing up to standards. To complete the test, prepare the unit, measure the temperature difference of…

NOTE: The unit should be kept off when performing these procedures. 1. Install a calibrated gauge manifold. 2. Recover the refrigerant and evacuate the system.…

Purpose: To check a unit suspected to be overcharged. 1. Install a calibrated gauge manifold. 2. Operate the unit in high speed cool five minutes…

Purpose: To add refrigerant to a unit low on charge. 1. Install a calibrated gauge manifold. 2. Attach the manifold service line to the refrigerant…

Purpose: To check a unit for the recommended charge. 1. Install a calibrated gauge manifold. 2. Operate the unit in high speed cool. 3. Maintain…

Purpose: To identify units that have recently developed a leak and have lost refrigerant. 1. Operate the unit on high speed cool 5 to 10…

Purpose: To properly remove gauges and minimize the loss of refrigerant. 1. Operate the unit in the cool mode. 2. Back seat the discharge service…

Purpose: To properly install gauges without low loss fittings. 1. Remove both the discharge and suction service valve stem caps. Save and re-use the caps…

Purpose: To properly install gauges with low loss fittings. 1. Remove both the discharge and suction service valve stem caps. Save and re-use the caps…