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Carrier 38HDR018-060 manual

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Table of contents for the manual

  • Page 1

    Manufa cturer res erves the right to discon tinue, or chang e at any time , specificat ions or designs witho ut notic e and wit hout inc urring obligati ons. Catalog No . 02-38HD0001-SI Printed in U.S .A. Form 38HD-4SI Pg 1 1-06 Replaces: 38HDC-3SI Book 1 4 Ta b 3 e 2 f Installation, Star t-Up and Ser vice Instr uctions CONTENTS Page SAFETY CONSIDE[...]

  • Page 2

    2 (FIELD PROVIDED AND INST ALLED) Fig. 2 — 38HDF ,HDR Unit Dimensions NOTE: Dimensions shown in feet-inches. Dimensions in ( ) are m illimeters. UNIT MODELS CHASSIS SIZE (Referen ce) ABC D E FG H J K L NP 38HDF Unit Size 38HDR Unit Size 018 018 0 2 ′ -1 1 / 8 ″ 3 ′ -0 15 / 16 ″ 1 ′ -2 9 / 16 ″ 1 ′ -4 ″ 1 ′ -11 7 / 16 ″ 1 ′ -[...]

  • Page 3

    3 Step 2 — Rig and Mount Unit MOUNTING ON GROUND — M ount unit on a solid, level concrete pad. Position unit so water or ice from roof does not fall directly ont o unit. Acce ssory stacking ki ts can be used when units are to be stac ked. See i nstallati on instruct ions provided with the accessory kit. Use field-provide d snow stand or ice rac[...]

  • Page 4

    4 Only use factory specified liquid-line filter driers with rated working pressures less than 600 psig. NOTE: Do not install a suction-line filter dri er in liquid line. MAKE PIPING SWEA T CONNECTIONS — Remove plasti c caps from liquid a nd suction servi ce valves. Use refrigerant grade tubing. Service va lves are closed from t he factory and ar [...]

  • Page 5

    5 Table 1B — 38HDR 018-060 P hysical D ata LEGEND *Unit shipped with full factory charge. See ARI (Air Conditioning and Refrigeration Institute) capacity tab le for proper charge and piston for each f an coil type. †V alve connection size is 7 / 8 inch. Recommended line size is 1 1 / 8 inches. **24 v and a m inimum of 40 va is provided in the f[...]

  • Page 6

    6 Step 4 — Make Electrical Connections CO N TR O L CI R C UI T W IR I N G — Control voltage i s 24 v (40 va minimum). See Fig. 5 and unit label diagram for fi eld- supplied wiring details. Route control wire through opening in unit side panel to connection in unit control box. NOTE: For wire runs up to 50 ft, use no. 18 A WG (American W ire Gag[...]

  • Page 7

    7 Table 2 — 38HDF Electric al Data LEGEND *P er missible limits of the v oltage range at which unit will operate satisf actorily . NO TES: 1. Control circuit is 24 v on all units and requires an exter nal power source. 2. All m otors and compres sors contain inter nal overload protection. 3. In compliance with NEC (U .S.A. Standard) requirements [...]

  • Page 8

    8 Table 3 — 38HDR E lectrical Data LEGEND *P er missible limits of the v oltage range at which unit will operate satisf actorily . NO TES: 1. Control circuit is 24 v on all units and requires an exter nal power source. 2. All m otors and compress ors contain inter nal overload protection. 3. In compliance with NEC (U .S.A. Standard) requirements [...]

  • Page 9

    9 LEGEND NO TES : 1. Com pressor and fan motors are t hermally protected. 2. W ire in accordance with National Electrical Code (NEC) and local codes . Replace any original wires with 90° C wire or its equiv alent. 3. Us e minimum 60° C wire f or field power wiring. 4. T ransformer has inter nal 4.5A ther mal fuse on the pr imary side. 5. T ransf [...]

  • Page 10

    10 LEGEND NO TES: 1. Compr essor and f an motors are thermally protected. 2. W ire in accordance with National Electric al Code (NEC) and local co des. Replace any original wires with 90° C wire or its equi valent. 3. The CLO locks out the COMP to prev ent shor t cycling on COMP overloads and safet y devi ces. Bef ore replacing CLO check t hese de[...]

  • Page 11

    11 ST AR T -UP Preliminary Chec ks 1. Check that all internal wiring connections are tight and that all barri ers, covers, and panels ar e in place. 2. Field electrical power source must agree with unit name - plate rating. 3. All service val ves must be open. 4. Belly-band crankcase heater must be tight on compressor crankcase for those units w it[...]

  • Page 12

    12 T o troubleshoot: 1. Apply voltmeter acros s crankcase heat er leads to see if heater voltage i s on. Do not touch heater . Carefully feel area around crankcas e heater; if warm, c rankcase heater is functioning. 2. W ith power off and heater leads disconne cted, check across leads with ohmmet er . Do not look for a specific re- sistance reading[...]

  • Page 13

    13 Table 4 — Pres sure vs. Tempera ture Cha rt — Pu ron® Refrig erant ( R-410A) Subcooling Met hod — For 38HDR units only , the sub- cooling method is used to check and adjust charge during the cooling season. Refer to T able 5 and the fol lowing procedure: NOTE: For use with residential fan coils and the 40QA060 under ceiling unit only . 1.[...]

  • Page 14

    14 Table 5 — Subcooling Charging Table Compressor Lock out Switch — The 38HDR units are provided with a compressor lockout protective device. If the compressor shuts down due to any safety device, a current loop monitoring the compressor current senses no c urrent flow . The unit will lock out unt il the control power is interrupted to reset th[...]

  • Page 15

    15 Fig. 9 — T rouble shooting the Cooling Cycle[...]

  • Page 16

    Manufa cturer reser ves the right to discon tinue, or change at any time, specificat ions or designs w ithout not ice and without incurrin g obligations. Catalog No. 02-38HD0001-SI Printed in U.S.A. Form 38HD-4SI Pg 16 2-06A 1-06 Replace s: 38HDC-3SI Book 1 4 Ta b 3 e 2 f Copyright 2 006 Car rier Cor poration[...]