Carrier 38AK Informations techniques

1 38AKS028-044 Air-Cooled Condensing Units Installation, Start-Up and Service Instructions CONTENTS SAFETY CONSIDERATIONS ……………...…….1 BEFORE I

10 AB = 243v BC = 236v AC = 238v Average Voltage = 243 + 236 + 238 = 239 v 3 Determine maximum deviation from average voltage: (AB)243 – 239 = 4

11 method (through liquid service valve) on the high side. See approximate refrigerant charge in Table 1A-1B. charge according to the valves in

12 Fig. 10 – Charging Chart, 38AKS044, 50/60 Hz (Circuits No. 1 and 2) START-UP 38AKS Units – close field disconnect. Set thermosetting.

13 COMPLETE UNIT STOPPAGE Causes – Interruption of supplied power, compressor over temperature protection, open HPS, open OPS, or open LPS causes’

14 Fig. 11 – Timer Sequence Chart NOTE: Actual start-up and all refrigerant charge modifications should be done only under supervision of a

15 SERVICE (Fig. 12-14) CAUTION Turn off all power to unit before proceeding. 38AKS Units Access for servicing (See Fig.13) COMPRESSOR SECTION –

16 When additional oil or a complete charge is required, use only Carrier-approved compressor oil: Petroleum Specialties Inc ………….……… Cryol 150 Te

17 TROUBLESHOOTING – 38AKS UNITS SYMPTOM AND PROBABLE CAUSE PROBABLE REMEDY COMPRESSPR DOES NOT RUN 1. Control circuit breaker tripped. 1. Res

18 START-UP CHECKLIST I. PRELIMINARY INFORMATION OUTDOOR: MODEL NO. ……………………………………………. SERIAL NO. ……………………………………… INDOOR: AIR HANDLER MANUFACTURE

19 IS THE OIL LEVEL IN EACH COMPRESSOR CRANKCASE VISIBLE IN THE COMPRESSOR SIGHT GLASSES? (Y/N) ……………………….. CHECK VOLTAGE IMBALANCE

2 Fig. 1 UNIT MAX SHIPPING WEIGHT CENTER OF GRAVITY B C lb kg In. mm In. mm 38AKS 028 1924 872 43.0 1091 28.0 711 034 2115 960 43.0 1092 28.0 711

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5 Table 1A – physical Data – 38AKS028-044 Units – 50Hz, English UNIT 38AKS 028 034 044 NOMINAL CAPACITY (tons) 23.4 26.7 35.8 OPERATING WEIGHTS (lb)

6 Table 1B – physical data – 38AKS028-044 Units – 50Hz,SI UNIT 38AKS 028 034 044 NOMINAL CAPACITY (kw) 82.5 94.5 127.0 OPERATING WEIGHTS (kg) Al

7 Fig.5 – Compressor Mounting (Typical unit Shown) INSTALLATION Refrigerant Piping Connections – Line sizes depended on length of piping

8 Fig.7 – Liquid Line Solenoid Valve, Filter Drier(s), and Sight Glass Locations Table 2 – Refrigerant Pipe Sizes, Single suction Risers – 38AK

9 IMPORTANT: Operating unit on improper supply voltage, or with excessive phase imbalance, constitutes abuse and may affect Carrier w