Anti Short Cycle Timer Test
The 3 minute time delay feature can be bypassed by shorting the “TEST” pins together.
Heating Mode
When the “TEST” pins are shorted together for more than 1 second, the control will switch between defrost mode and heating mode as described in the Defrost Test Procedure section (page 12).
Cooling Mode
When the ‘TEST” pins are shorted together for more than 1 second, the Anti Short Cycle Timer will be bypassed.
ADJUSTMENT OF REFRIGERANT
CHARGE:
CAUTION:
This heat pump contains liquid and gaseous refrigerant under pressure.Adjustmentofrefrigerant charge should only be attempted by qualified, trained personnel thoroughly familiar with the equipment and safe responsible refrigerant handling procedures. Under no circumstances should the homeowner attempt to install and/or service this equipment. Failure to comply with this warning could result in equipment damage, personal injury, or death.
NOTE: The unit must be charged while both fi rst and second stages are operating.
NOTE: To achieve rated capacity and effi ciency the compressor must be exposed to refrigerant for at least 24 hours prior to running and then must be run for a minimum of 12 hours.See Refrigerant Charging Charts (Figures 11 - 14, pages 14 & 15) for Charging in Cooling Mode.
Charging an
1.With the system operating at
2.Measure the liquid refrigerant temperature (° F) at the service valve.
3.For the temperature measured, determine the required liquid refrigerant pressure from the appropriate charging charts.
•If the pressure measured in step 1 is greater than the required liquid refrigerant pressure
determined in step 4, then there is too much charge in the system. Remove refrigerant and repeat steps 1 through 3 until the system is correctly charged.
•If the pressure measured in step 1 is less than the required liquid refrigerant pressure determined in step 4, then there is too little charge in the system. Add refrigerant and repeat steps 1 through 3 until the system is correctly charged.
Charging an R-410A Unit in Heating Mode.
1.Evacuate the refrigerant system.
2.Weigh in the proper charge as shown on the unit rating plate and use the Heating Charging Tables (pages 16 & 17) as a guide. Tables reflect conditions at high speed operation.Unit charge MUST be verifi ed in cooling season.
3.Verify the unit is operating properly according to the heating functional checkout on page 12.
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