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1,2 Models and SEER Ranges.................. 1 Factory-Installed Options................... 2 SAFETY CONSIDERATIONS ............... 3 SERVICE............................... ... 3 Cabinet.................................... 3 • REMOVING LOUVERED CASING • REMOVING FAN ORIFICE • ELECTRICAL BOX ACCESS Electrical...................................5-11 • CONTACTORS • CAPACITORS • TIME GUARD II • CRANKCASE HEATER • PRESSURE SWITCHES • DEFROST THERMOSTATS , • PRINTED-CIRCUIT CONTROL BOARD • FAN MOTORS • SERVICE SENTRY CONTROL BOARD • OUTDOOR THERMOSTATS Page Compressor............. ...................12-15 • MECHANICAL FAILURES • ELECTRICAL FAILURES • SYSTEM CLEAN-UP AFTER BURN-OUT • COMPRESSOR REMOVAL AND REPLACEMENT Refrigeration System ......................15-20 • REFRIGERATION CYCLE • LEAK DETECTING • SERVICE VALVES • CARRIER COMPATIBLE FITTING • ACCURATER™ (Bypass Type) COMPONENTS • REVERSING VALVE • COIL REMOVAL • COIL CLEANING • LIQUID LINE STRAINER • ACCUMULATOR • SYSTEM CHARGING (for all approved combinations) INTRODUCTION This Service Manual enables a service technician to service and repair a family of similar condensing units and heat pumps. Outwardly, many models appear Models and SEER Ranges Table 1 — Condensing Units similar, however, there are distinct differences. Tables l and 2 help to differentiate these differences. Table 2 — Heat Pumps MODEL DIAMETERS (in) SEER* (Nominal) MODEL DIAMETERS (in.) SEER* (Nominal) C:O.P.t (Minimum) 38EH015 22 9.0 38QH015 22 ■ 9.0 2.85 38EH018 22 9.0 38QH018 22 9.0 2.85 38 EH 024 22 9.0 38QH024 30 9.0 2.85 38 EH 030 30 9.0 38QH030 30 9.0 2.85 38EH036 30 9.0 38QH036 30 9.0 2.85 38EH042 30 9.0 38QH042 30 9.0 2.85 38 EH 048 30 9.0 38QH048 30 9.0 2.85 38EH060 30 9.0 38QH060 39 9.0 2.85 38EN015 17 8.0 38QN015 17 8.0 2.55 38EN018 17 8.0 38QN018 17 8.0 2.55 38EN024 17 8.0 38QN024 22 8.0 2.55 38EN030 22 8.0 38QN030 22 8.0 2.55 38EN036 22 8.0 38QN036 30 8.0 2.55 38EN042 30 8.0 38QN042 30 8.0 2.55 38 EN 048 ' 30 8.0 38QN048 30 8.0 2.55 38 EN 060 30 8.0 38QN060 30 8.0 2.55 38ES018 30 10.0 38QS018 30 10.0 2.85 38ES024 30 10.0 38QS024 30 10.0 2.85 38ES030 30 10.0 38QS030 30 10.0 2.85 38ES036 30 10.0 38QS036 30 10.0 2.85 38ES042 30 10.0 38QS042 30 10.0 2.85 38ES048 30 10.0 38QS048 30 10.0 2.85 38ES060 39 10.0 38QS060 39 10.0 2.85 ’SEER — Seasonal Energy Efficiency Ratio. The higher the number, the less electrical power required to reach a given capacity. SEER is derived by dividing output energy by input energy. fC.O.P. — Coefficient of Performance (heating), determined by dividing Btu output by power input required to producethis Btu output. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC101 Catalog No. 563-857 Printed in U.S.A. Form 38E.Q-1SM Pg 1 11-85 Replaces: New For replacement items use Carrier Specified Parts. Book |1 1 |4 |4 Tab ¡3a 5a|2a|5a Factory-Installed Options — Any condensing unit or heat pump listed in Tables 1 and 2 may be ordered as Basic or in one of 3 factory-option packages. Package designations are included in model number (excluding Basic). Example: 38EN0243015A/. SM designates this unit as sheet metal option package. Option package designations are shown in Table 3. Table 3 — Option Packages Basic 38EH.ES Standard unit with no added options. Sheet Metal Option (SM) Same unit as Basic except with addition of louvered Inlet casing. Deluxe Option (DL) Same unit as (SM) except for addition ■ of start assist components on singlephase units, crankcase heater, hlgh-and low-pressure switches, and-accumulator. Custom Deluxe Option (CD) Same unit as (DL) except for addition of sound shield around compressor, and Time Guard II device. Basic 38EN Standard unit with no added options. Sheet Metal Option (SM) Same unit as Basic except for addition of louvered inlet casing. Basic 38QH.QS Standard unit with no added options. Sheet Metal Option (SM) Same unit as Basic except for addition of louvered Inlet casing. Deluxe Option (DL) Same unit as (SM) except for addition of start assist components on singlephase units, high-pressu.re switch, and Service Sentry device. Custom Deluxe Option (CD) Same unit as (DL) except for addition of sound shield around compressor and Time Guard II device. Basic 38QN Standard unit with no added options. Sheet Metal Option (SM) Same unit as Basic, except for addition of louvered inlet casing. Table 4 — Condensing Unit Specifications OUTDOOR UNIT MODEL NO. 38- ORIGINAL COMPRESSOR MODEL REPLACEMENT COMPRESSOR MODEL OIL CHARGE REFRIG CHARGE* (R-22) Initial Recharge EH- 015301 RE23-0125 50QT662300 24 20 ' ' 6.2 018301 AB5515H 50SR661301 32 30 6.3 024301 MD2315GG MD2364GE 46 44 5.6 030301 MD3215GG MD3264GE 46 44 7.3 036301 AV5535E 50SR661336 54 50 7.4 042301 AV5542E 50SR661300 54 50 7.1 048321 AV5546H 50SR661331 54 50 8.9 060301 PC6016B...