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Installation Instructions

MODELS 123A / 124A

LEGACY

T

SERIES AIR CONDITIONERS

WITH PURON

R

REFRIGERANT

SIZES 018 TO 060

1--1/2 TO 5 NOMINAL TONS

TM

a05236

Fig. 1

---

123A / 124A

NOTE

: Read the entire instruction manual before starting the

installation.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS

2

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INSTALLATION RECOMMENDATIONS

2

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INSTALLATION

3 -- 9

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Step 1 -- Check Equipment & Jobsite

3

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Step 2 -- Install on Solid Pad

3

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Step 3 -- Clearance Requirements

3

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Step 4 -- Operating Ambient

3

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Step 5 -- Install TXV

3 -- 4

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Step 6 -- Make Piping Connections

5 -- 7

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Step 7 -- Make Electrical Connections

7 -- 8

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Step 8 -- Compressor Crankcase Heater

8

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Step 9 -- Install Electrical Accessories

8

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Step 10 -- Start--Up

9

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Step 11 -- Check Charge

9

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Step 12 -- Final Checks

9

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TECH ASSIST

T

DIAGNOSTICS AT--A--GLANCE

10

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CARE AND MAINTENANCE

11

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PURON REFRIGERANT QUICK REFERENCE GUIDE

12

Summary of Contents for Legacy 123A

Page 1: ...ECOMMENDATIONS 2 INSTALLATION 3 9 Step 1 Check Equipment Jobsite 3 Step 2 Install on Solid Pad 3 Step 3 Clearance Requirements 3 Step 4 Operating Ambient 3 Step 5 Install TXV 3 4 Step 6 Make Piping Connections 5 7 Step 7 Make Electrical Connections 7 8 Step 8 Compressor Crankcase Heater 8 Step 9 Install Electrical Accessories 8 Step 10 Start Up 9 Step 11 Check Charge 9 Step 12 Final Checks 9 TECH ...

Page 2: ...ate at higher pressures than standard R 22 systems To avoid damage to the unit or possible personal injury do not use R 22 service equipment or components on Puron refrigerant equipment INSTALLATION RECOMMENDATIONS NOTE In some cases noise in the living area has been traced to gas pulsations from improper installation of equipment 1 Locate unit away from windows patios decks etc where unit operati...

Page 3: ...t per compressor manufacturer specifications STEP 3 Clearance Requirements When installing allow sufficient space for airflow clearance wiring refrigerant piping and service Allow 30 in clearance to service end of unit and 48 in above unit For proper airflow a 6 in clearance on 1 side of unit and 12 in on all remaining sides must be maintained Maintain a distance of 24 in between units Position so...

Page 4: ...lacing TXV on R 22 Indoor Coil 1 Pump system down to 2 psig and recover refrigerant 2 Remove coil access panel and fitting panel from front of cabinet 3 Remove TXV support clamp using a 5 16 in nut driver Save the clamp 4 Remove R 22 TXV using a backup wrench on flare connections to prevent damage to tubing 5 Using wire cutters cut equalizer tube off flush with vapor tube inside cabinet 6 Remove b...

Page 5: ...ndition Rated tubing diameters shown in Table 1 recommended up to 80 ft See Product Data for acceptable alternate vapor diameters and associated capacity losses For tubing requirements beyond 80 ft substantial capacity and performance losses can occur Following the recommendations in the Longline Guideline Residential Split System Air Conditioners and Heat Pumps Using Puron Refrigerant will reduce...

Page 6: ...id tube to the indoor coil 2 Wrap filter drier with damp cloth 3 Braze filter drier to above 5 liquid tube Flow arrow must point towards indoor coil 4 Connect and braze liquid refrigerant tube to the filter drier A05178 Fig 5 Liquid Line Filter Drier Refrigerant Tubing Connection Outdoor Connect vapor tube to fitting on outdoor unit vapor service valves see Table 1 Connect and braze the 3 8 coupli...

Page 7: ...tdoor unit has not shifted during shipment Ensure tubes are not rubbing against each other or any sheet metal Pay close attention to feeder tubes making sure wire ties on feeder tubes are secure and tight STEP 7 Make Electrical Connections WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Do not supply power to unit with compressor terminal box...

Page 8: ...ermostat is located more than 100 ft from unit as measured along the control voltage wires use No 16 AWG color coded wire to avoid excessive voltage drop All wiring must be NEC Class 1 and must be separated from incoming power leads Use furnace transformer fan coil transformer or accessory transformer for control power 24 v 40 va minimum NOTE Use of available 24 v accessories may exceed the minimu...

Page 9: ...lower relay Compressor and motors stop If indoor unit is equipped with a time delay relay circuit the indoor blower will run an additional 90 sec to increase system efficiency STEP 11 Check Charge Unit Charge Factory charge and charging method are shown on unit information plate Charge Puron units with cylinder in inverted position and a commercial type metering device in manifold hose Charge refr...

Page 10: ...ire connections On On On Off Off Off No 230V power to unit Check 230V disconnect circuit breaker Check 230V L1 L2 wire connections On On On On Off Off Contactor open Check Contactor and replace if necessary Check contactor wire connections On On On On On Off Compressor not running Check for compressor protector trip capacitor fault faulty connections or compressor fault SEE BELOW On On On On On On...

Page 11: ... 78 76 74 72 70 68 266 80 78 76 74 72 70 274 82 80 78 76 74 72 283 84 82 80 78 76 74 291 86 84 82 80 78 76 299 88 86 84 82 80 78 308 90 88 86 84 82 80 317 92 90 88 86 84 82 326 94 92 90 88 86 84 335 96 94 92 90 88 86 345 98 96 94 92 90 88 354 100 98 96 94 92 90 364 102 100 98 96 94 92 374 104 102 100 98 96 94 384 106 104 102 100 98 96 395 108 106 104 102 100 98 406 110 108 106 104 102 100 416 112 ...

Page 12: ... S Do not install a suction line filter drier in liquid line S POE oils absorb moisture rapidly Do not expose oil to atmosphere S POE oils may cause damage to certain plastics and roofing materials S Wrap all filter driers and service valves with wet cloth when brazing S A factory approved liquid line filter drier is required on every unit S Do NOT use an R 22 TXV S If indoor unit is equipped with...

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