Unitary products group EA120, Installation Instruction

Page 1: ...YOU START TO INSTALL YOUR UNIT SAVE THIS MANUAL SPLIT SYSTEM HEAT PUMPS OUTDOOR UNITS MODEL EA120 035 18549 000 B 0402 CONTENTS GENERAL INFORMATION 3 INSTALLATION 5 OPERATION 17 START UP 20 MAINTENAN...

Page 2: ...UENCE OF OPERATION 17 Cooling Operation 17 Heating Operation 18 Defrost Cycle 18 Operation Below 0 F 19 Emergency Heat Operation 19 START UP CRANKCASE HEATER 20 PRE START CHECK 20 INITIAL START UP 20...

Page 3: ...8475 000 All accessories come with a separate installation man ual Refer to Parts Manual for complete listing of replacement parts on this equipment The above forms may be ordered from Standard Regist...

Page 4: ...andard Efficiency 4 Pipe 120 Nominal Cooling Capacity MBH 090 7 1 2 Ton 120 10 Ton 150 12 1 2 Ton 180 15 Ton 240 20 Ton 300 25 Ton 360 30 Ton 480 40 Ton 600 50 Ton C Heat Type C Cooling Only 00 Nomina...

Page 5: ...rt the unit The unit must be mounted on solid level supports The supports can be channel iron beams or wooden beams treated to reduce deterioration A minimum of two 2 beams are required to support eac...

Page 6: ...he top of the unit is less than 5 feet See Figure 2 BEFORE LIFTING A UNIT MAKE SURE THAT ITS WEIGHT IS DISTRIBUTED EQUALLY ON THE STRAPS SO THAT IT WILL LIFT EVENLY Units may also be moved or lifted w...

Page 7: ...st be suitable for an outdoor location Although it should be installed near the unit do NOT secure it to the unit cabinet Refer to Figure 3 for typical field wiring CONTROL WIRING Refer to Figure 4 fo...

Page 8: ...ld become excessive and result in malfunctioning of the unit controls REFRIGERANT PIPING GENERAL GUIDELINES Many service problems can be avoided by taking ade quate precautions to provide an internall...

Page 9: ...d 0 FIGURE 4 UNIT DIMENSIONS AND CLEARANCES AIR OUT AIR IN AIR OUT 2 3 4 32 2 1 4 32 1 2 70 1 2 8 3 4 5 3 8 CONTROL BOX ACCESS SERVICE PORT LOCATION 39 1 1 8 OD 10 TON 1 3 8 OD 12 1 2 TON SUCTION LINE...

Page 10: ...flashing will not only cause erratic valve operation and poor system performance but could also damage the expansion valve Total pressure loss includes the static head loss explained above plus the fr...

Page 11: ...por and discharge lines for pressure checking the system All access ports are sealed with a removable cap Never remove a cap unless the valve is fully back seated with its valve stem in the maximum co...

Page 12: ...ended period of time it should be cleaned before being used The liquid line connections can now be brazed while maintaining a minimum flow of dry nitrogen through the piping NOTE A filter drier is fac...

Page 13: ...ough the access port of the vapor line service valve and the hole in the vapor disc 5 After the disc has been removed burnish the exter nal surfaces and clean the internal surfaces of the vapor connec...

Page 14: ...of the condenser air if necessary to assure a head pressure of 280 psig during the charging procedure NOTE The installer should return to the job to verify the operating charge when the ambient tem p...

Page 15: ...035 18549 000 B 0402 Unitary Products Group 15 FIGURE 7 REFRIGERANT FLOW DIAGRAM...

Page 16: ...16 Unitary Products Group FIGURE 8 CHARGING CURVE EA120 EA120 Charge Curve 170 190 210 230 250 270 290 310 330 65 70 75 80 85 90 Suction Pressure Discharge Pressure 115 Ambient 105 Ambient 95 Ambient...

Page 17: ...rs 4 Relay RY1 also prevents the 10KW portion of accessory electric heat referenced as standby electric heat from being utilized whenever the com pressor is in operation This part of the circuit is co...

Page 18: ...int on the thermostat below the temperature in the conditioned space and then returning it to its original setting c Opening and closing the power supply main dis connect switch IN ALL THREE RESET MET...

Page 19: ...by the second stage TH2 of the room ther mostat same as described under Item 8 of HEATING OPERATION 2 The indoor section blower operation will be con trolled by the first stage heating TH1 of the room...

Page 20: ...t lines will be hot during the HEAT and COOL cycles Only two lines will remain cool for all cycles the line between the compressor and the accumulator and the line between the accumulator and the reve...

Page 21: ...lded closed 3 Every compressor is protected by crankcase heat ers to prevent refrigerant from accumulating in the crankcases of the compressor during an OFF cycle 4 Outdoor fan motors and the secondar...

Page 22: ...The outdoor fan motors are equipped with factory lubri cated and sealed ball bearings They do not require any maintenance REPLACEMENT PARTS Contact your local UPG Distribution Center for replace ment...

Page 23: ...035 18549 000 B 0402 Unitary Products Group 23 NOTES...

Page 24: ...hange without notice Printed in U S A 035 18549 000 B 0402 Copyright by Unitary Products Group 2002 All rights reserved Supersedes 035 18549 000 A 0102 Unitary 5005 Norman Products York OK Group Drive...