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Carrier 38AK012 manual

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Table of contents for the manual

  • Page 1

    Manufactu rer reser ves the rig ht to dis continue , or chan ge at a ny time, spec ificat ions or des igns without notice an d withou t inc urring obligations. PC 111 Catalo g No. 533-80003 Pr inted in U.S.A. For m 38A -9SI Pg 1 5-01 Replac es: 38A-8 SI Book 1 4 Ta b 3 a 2 a Installation, Star t-Up and Ser v ice Instr u ctions CONTENTS Pa ge SAFETY[...]

  • Page 2

    2 Table 1A — P hysical Da ta — 50/60 Hz (English) LEGE ND NEMA — National Electrical M anuf acturing Assoc iation *Unit is factory supplied w ith holding charge only . †Storage capacity of condenser coil with coil 8 0% full of liquid R-22 at 124 F . NO TE: Unit 38AKS012 has one step o f unloading. Full load is 100% capac ity , and one step [...]

  • Page 3

    3 Table 1B — P hysical D ata — 50/6 0 Hz (SI) LEGE ND NEMA — National Electrical M anuf acturing Assoc iation *Unit is factory supplied w ith holding charge only . †Storage capacity of condens er coil with coil 8 0% full of liquid R-2 2 at 51 C. NO TES: 1. Unit 38AKS012 has one step of unloading. Full load is 100% capacity , and one step of[...]

  • Page 4

    4 CONSIDER SYSTEM REQUIR EMENTS • Consult local bu ilding codes and NEC for s pecial instal- lation requirem ents. • Allow sufficient space for airflow clearan ce, wiring, refriger ant pipi ng, and u nit ser vicing . See Fig. 2. • Locate unit so that co ndenser airflow is unrestricted o n all sides and abov e. Refer to Fig. 2. • Unit may be[...]

  • Page 5

    5 UNIT 38 DIM. A DIM. B DIM. C DIM. D DIM . E DIM. F AK007 1 ′ -6 1 / 2 ″ [470.0] 1 ′ -2 3 / 4 ″ [375.0] — — 1 ′ -2 1 / 4 ″ [362 ] 1 ′ -4 5 / 16 ″ [415 ] 2 ′ -9 5 / 16 ″ [846.5] AK008 1 ′ -8 ″ [508.0] 1 ′ -6 1 / 2 ″ [470.0] — — 1 ′ -3 ″ [381 ] 2 ′ - 5 / 16 ″ [613 ] 3 ′ -5 7 / 16 ″ [1052.5] AK012 1 ′[...]

  • Page 6

    6 FIL TER DRIER AND MOIS TURE INDICA TOR — The fil- ter drier is factory installed. M oisture indicator is field-supplied and should be installed just after liquid line shutof f valve. Do not use a r eceiver; there is none provided with unit and one should not be used. NOTE: Unit is shipped with R-22 holding charge. System pressure must be reliev[...]

  • Page 7

    7 Table 5 — E lectrical Data LEGEND NO TES: 1. In compliance with NEC requirem ents f or multimotor and combi- nation load equipment (ref er to NEC Ar ticles 430 and 440) , the ov erc urrent protective de vice f or the unit shall be fuse or HACR breaker . 2. Unbalanc ed 3- Phas e Suppl y V oltage Nev er operate a motor where a phase imbalan ce in[...]

  • Page 8

    8 FI E L D CO N T R O L WI R I NG — Install a Carri er-approved accessor y thermostat a ssembly ac cording to install ation instructi ons included with t he access ory . L ocate the rmostat assembly on a solid wall i n the conditioned spa ce to sense ave r- age temperatur e in accorda nce with therm ostat ins tallation instructions. Route thermos[...]

  • Page 9

    9 ST ART -UP Preliminary Chec ks 1. Field electrical power source must agree with unit name- plate rating. 2. Check that all internal wiring conne ctions are tight and that all barriers, covers, and pane ls are in place. Ensure no electrical wir es are in contact wit h refrigerant tubing. 3. Ensure all service valves are open. On 38AKS units, be su[...]

  • Page 10

    10 Compressor Overload — This overload interrupts power to t he compress or when either the current or internal motor winding temperature be comes excessive, and automati- cally res ets when t he inte rnal tem perature drops t o a safe l evel. This overload may require up to 60 minutes (or longer) to reset. If the internal overload is suspected o[...]

  • Page 11

    11 Oil Char g e (T ables 1A and 1 B) 38 A KS U NI T S — Allow unit to run for about 20 minutes. Stop unit and che ck compressor oil level . Add oil only if neces- sary to bring oil into view in sight glass. Use on ly Ca rr ier- appr oved compr ess or oil. Approved oils are: Suniso 3GS WF32-150 38 A K UN I T S — The 38AK units do not have a sigh[...]

  • Page 12

    12 Capacity Contr ol — Unit 38AKS012 Onl y — A suction pressure-actuated unl oader controls 2 cylinders and provides capacity control. Unloaders are fac tory set (see T able 1A or 1B), but may be field adjusted as follows: CONTROL SET POINT (cylinder l oad point) is adjustabl e from 0 to 85 psig (586 kPa). T o adjust, turn control set point adj[...]

  • Page 13

    13 TROUBLESHOO TING GUIDE NO TE: See Fig. 15 f or component arrangements. SYMPTOM CA U SE REME D Y Compressor does not run — Contactor open P ower off . Restore power . Fuses blo wn. Replace with correct fuses after finding cause and correcting. T ransformer open/shor t ed. Replace transformer if primar y windings are receiving power and no outpu[...]

  • Page 14

    Manufactu rer reser ves the rig ht to dis continue , or chan ge at a ny time, spec ificati ons or des igns without notice an d wit hout inc urring obligations. PC 111 Catalo g No. 533-80003 Pr inted in U.S.A. For m 38 A-9SI Pg 14 5-01 Replac es: 38A -8SI Book 1 4 Ta b 3 a 2 a Copyright 20 01 Car rier Cor po ration C— Contactor , Compressor CAP ?[...]

  • Page 15

    ST ART -UP CHECKLIST I. Preliminary Inf ormation OUTDOOR: MO DEL NO . _________ ______________ ________ SERIAL NO . _____________ ______________ _________ INDOOR: AIR HANDLER MANUF ACTURER ________ _____________________ ______________ ______________ _________ MODEL NO ._____ ______________ ______________ _ SERIAL NO . ______ _____________________ _[...]

  • Page 16

    Manufactu rer reser ves the rig ht to dis continue , or chan ge at a ny time, spec ificati ons or des igns without notice an d wit hout inc urring obligations. PC 111 Catalog No. 533-80003 Printe d in U.S.A. Form 38A-9S I Pg CL -2 5-0 1 Replaces: 3 8A-8 SI Book 1 4 Ta b 3 a 2 a Copyright 20 01 Car rier Cor po ration - - - - - - - - - - - - - - - - [...]