Carrier 50JZ-A- Manuals

7 PERSONAL INJURY HAZARD Failure to follow this warning could result in personal injury or death. For vertical supply and return units, tools or parts coulddrop into ductwork Install a 90 degree turn in the returnductwork between the unit and the conditioned space. If a90 degree elbow cannot be inst...

8 7. Flash, weatherproof, and vibration--isolate all openings in building structure in accordance with local codes and good building practices. Step 6 — Provide for Condensate Disposal NOTE : Ensure that condensate--water disposal methods comply with local codes, restrictions, and practices.The 50JZ...

10 Step 7 — Install Electrical Connections UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the unit being installed. 1. Make all electrical connections in accordance with NEC NFPA 70 (latest edition) and local electrical codesgoverning such wiring. In Canada, all ...

11 Accessory Electric Heaters Installation Electric heaters may be installed with the 50JZ--A units per instructions supplied with electric heater package. See unit ratingplate for factory--approved electric heater kits. Sequence of Operation a. CONTINUOUS FAN (1.) Thermostat closes circuit R to G e...

13 A00010 LED STATUS OFF No call for compressor operation FLASHING Reversed phase ON Normal Fig. 13 -- Phase Monitor Control and LED Indicators PRE--START--UP FIRE, EXPLOSION, ELECTRICAL AND ENVIRONMENTAL SHOCK HAZARD Failure to follow this warning could result in personal injury, death or property ...

14 5. Charge unit with Puron (R--410A) refrigerant, using an electronic scale. Refer to unit rating plate for required charge. Step 2 — Start--Up Adjustments Complete the required procedures given in the Pre--Start--Up section before starting the unit. Do not jumper any safety deviceswhen operating ...

15 6. Using the superheat value in step 5, locate the intersection of the required superheat with the suction pressure previ- ously measured. Note the required suction tube temperature.Using a tolerance of +/-- 1.7 ° C, add refrigerant if actual temperature is higher than charted suction tube temper...

16 Table 4 – Wet Coil Air Delivery ENGLISH 400 VOLT UNIT MOTOR SPEED EXTERNAL STATIC PRESSURE (IN. W.C) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 50JZ --- A24 Low Watts 303 305 306 300 --- --- --- --- --- --- --- Cfm 969 879 785 687 --- --- --- --- --- --- --- High Watts --- --- --- --- 435 428 42...

17 OF2 OF1 ON QUIET SHIFT 120 30 60 60 30 90 INTER V AL TIMER OFF P3 DFT O R W 2 Y C T2 C C O DFT T1 Y P1 J1 SPEEDUP SpeedupPins Defrost intervalDIP switches QuietShift A08020 Fig. 17 -- Defrost Control Step 3 — Defrost Control Quiet Shift Quiet Shift is a field--selectable defrost mode, which will ...

18 PERSONAL INJURY AND UNIT DAMAGE HAZARD Failure to follow this warning could result in personal injury or death and unit component damage.The ability to properly perform maintenance on this equipment requires certain expertise, mechanical skills, tools and equipment. If you do not possess these, d...

20 Step 10 — High--Pressure Switch The high--pressure switch is located in the discharge line andprotects against excessive condenser coil pressure. It opens at 650psig (4482 kPa).High pressure may be caused by a dirty outdoor coil, failed fanmotor, or outdoor air recirculation.To check switch: 1. T...

21 FEEDER TUBE STUB TUBE DEFROST THERMOSTAT C99029 Fig. 20 -- Defrost Thermostat TROUBLESHOOTING Refer to the Cooling and Heating Troubleshooting Chart (Table 7)for troubleshooting information. START--UP CHECKLIST Use the Start--Up Checklist. PURON R (R--410A) QUICK REFERENCE GUIDE S Puron refrigera...

22 Table 7 – Troubleshooting Chart SYMPTOM CAUSE REMEDY Compressor and condenser fan will not start. Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective contactor, transformer, or high--pressure, loss--of--charge or low--pressure swi...