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5390862-UIM-A-0318

Johnson Controls Unitary Products

17

 FIGURE 20:  

Thermostat Chart - Two Stage AC – Variable Speed Air Handler

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Summary of Contents for 19 SEER

Page 1: ...y charged with refrigerant for a nominal sized matching indoor coil plus 15 feet of field supplied lines SECTION II SAFETY This is a safety alert symbol When you see this symbol on labels or in manuals be alert to the potential for personal injury Understand and pay particular attention to the signal words DANGER WARNING or CAUTION DANGER indicates an imminently hazardous situation which if not av...

Page 2: ...oling operation below 35 F outdoor ambient temperature DO NOT modify the control System for these models to operate with any kind of Low Ambient kit 5 If this equipment is to be used in a low ambient outdoor application 55 F or lower a compressor crank case is heater accessory must be applied Please refer to UPGnet or price pages for the appropri ate Crank Case Heater for your model 6 The maximum ...

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Page 4: ...conditions may require direct wall mounted brackets to be used to locate and support the outdoor unit In these applications care must be taken to address unit base pan support structural integ rity safe access and serviceability as well as the possible sound and vibration transmission into the structure Wall mounting requires 3 mounting brackets and best served by a properly engineered solution Se...

Page 5: ... at the indoor coil 4 Braze the liquid line to the indoor coil liquid connection Nitrogen should be flowing through the indoor coil 5 Slide the grommet away from the vapor connection at the indoor coil Braze the vapor line to the indoor coil vapor connection After the connection has cooled slide the grommet back into original position 6 Protect the vapor valve with a wet rag and braze the vapor li...

Page 6: ...ngs See Figure 6 5 Slide the nut removed in step 3 over the supplied liquid line Place supplied Teflon washer from TXV kit in place on TXV and install liq uid line to the top of the thermal expansion valve Adjust assembly so liquid line aligns with hole in access panel Hand tighten the liq uid line and apply an additional 1 4 turn to seal 6 Install the TXV equalizer line onto the vapor line by han...

Page 7: ...gerant charge added accordingly MEASURE INDOOR AIR FLOW To determine rated air flow for a specific match consult the technical lit erature at www upgnet com When attempting to match this air flow select the lowest possible speed tap measure the actual flow and adjust as necessary To measure actual air flow it is not an acceptable method to just check the jumper pin setting tables and to assume 0 5...

Page 8: ...rature and operate system for at least 10 15 minutes 2 Refer to the technical guide for the recommended indoor airflow and verify it is correct it should be 350 400 SCFM per ton 3 Measure and record the indoor wet bulb WB and the outdoor ambient dry bulb DB temperature 4 Using the charging chart located on the unit find the intersection of the indoor wet bulb and the outdoor dry bulb This is the r...

Page 9: ...ure to adjust charge in the unit Add or remove charge and adjust windows to maintain the desired temperature inside the tent TABLE 2 R 410A Saturation Properties TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG 45 130 60 170 75 217 90 274 105 341 46 132 61 173 76 221 91 278 106 345 47 135 62 176 77 224 92 282 107 350 48 137 63 179 78 228 93 2...

Page 10: ...pment the control box can slide down and swing open Considerations for running the electrical supply and power control wiring should be made to utilize this swing open feature for future service work You will not need to drop swing the box open for installation of the electrical supply and power wiring just account for the motion the box will have in the wire routing The complete connection diagra...

Page 11: ...volt control wiring NEC Class 2 from the outdoor unit to the indoor unit and to the thermostat in the steps below 2 If utilizing the Demand Response or the Y2Lock feature a minimum of five thermostat wires will need to be ran to the outdoor unit from the indoor equipment If the features are not applied only four wires are needed 3 Trace the harness out where it ends in a large 12 pin Molex con nec...

Page 12: ... installation of the dehumidification control the HUM STAT jumper on the indoor variable speed air handler or furnace control board must be set to YES During cooling if the relative humidity in the space is higher than the desired set point of the dehumidification control the variable speed blower motor will operate at a lower speed until the dehumidification control is satisfied A 40 60 relative ...

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Page 19: ...active call less than two sec onds will display the current mode Pressing the PUSH BUTTON with no active call longer than six sec onds will display the current mode and tonnage AC HP is determined by the presence of the reversing valve ASCD Anti Short Cycle Delay After the tonnage is set a call may be given Y and or Y Y2 The control has a 5 minute anti short cycle delay It will count the minutes d...

Page 20: ... pressed during two stage anticipation mode with an active thermostat call The control will remove the forced second stage TABLE 6 Fault Code Description Required Condition LED 7 Segment Display 1 7 Segment Display 2 Control Response Control Fault Control Failure Control Failure Detected RED solid 0 0 Failure Operational Faults High pressure switch fault not in lockout yet HPS Opening RED solid 0 ...

Page 21: ...ceived in AC mode O signal received in AC mode 1 fault occurrence 2 RED flashes 1 8 Soft Lockout W signal received in AC mode W signal received in AC mode 1 fault occurrence 2 RED flashes 1 9 Soft Lockout W and O signal received in AC mode W and O signal received in AC mode 1 fault occurrence 2 RED flashes 2 0 Soft Lockout System previously configured as AC now HP No RV on configuration RV present...

Page 22: ...t be alarmed as this is normal operation If the conditions are on a break over point the motor could speed up and slow down until a more constant condition is met Under typical operation the motor will speed up the warmer it is outside and slow down the cooler it is outside to maintain highest efficiency and operating pressures as needed Charging of the equipment with the variable outdoor fan moto...

Page 23: ...MPR COMPRESSOR CONT CONTACTOR CCH COMPR CRANKCASE HEATER DR DEMAND RESPONSE DTS DISCHARGE TEMP SENSOR GND GROUND HPS HIGH PRESSURE SWITCH LPS LOW PRESSURE SWITCH SC START CAPACITOR SR START RELAY BLK BLACK BLU BLUE BLU PNK BLUE w PINK STRIPE BRN BROWN GRN GREEN GRN YEL GREEN w YELLOW STRIPE GRY GREY RED RED RED WHT RED w WHITE STRIPE WHT WHITE YEL YELLOW YEL BLK YELLOW w BLACK STRIPE YEL RED YELLO...

Page 24: ...5390862 UIM A 0318 24 Johnson Controls Unitary Products NOTES ...

Page 25: ...s L1 L2 Compressor amperes L1 L2 Measured voltage R and C outdoor unit control board Air Flow Setup Cooling Supply static inches of water column Supply air dry bulb temperature Return air dry bulb temperature Temperature drop A B C D Blower Type Set Up Outside air dry bulb temperature Return air wet bulb temperature Supply air wet bulb temperature Return static inches of water column Electrical Co...

Page 26: ...e Owner Education Comments and Additional Job Details Provide owner with the owner s manual Explain thermostat use and programming if applicable to owner Unit Operation and Cycle Test Operate the unit through continuous fan cycles from the thermostat noting and correcting any problems Operate the unit through cooling cycles from the thermostat noting and correcting any problems Job site has been c...

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