Carrier 38HDC024 Specifications

Installation, Start-Upand Service InstructionsCONTENTSPageSAFETY CONSIDERATIONS ...1GENERAL ...1,2INS

8. With the remote controller, turn on the unit and operatein each mode (as applicable) for 15 minutes to test forproper operation. Do not operate in

Automatic Operation (Auto) Mode — If auto modeis selected, the system automatically switches the operatingmode from heating (heat pump system only) to

• Sleep Mode — The sleep mode timer will turn the unit offwhen the timer reaches zero minutes. During the first11⁄2hours from the time the sleep mode t

Batteries should be replaced once a year. Use 2 batteries (1.5v, dc-type, AAA alkaline batteries). Never use old or re-charged batteries together with

To Clean Outdoor Coil (Outdoor Unit)Some metal parts and sharp fins of outdoor unit coil cancause personal injury during cleaning. Clean coilcarefully.

COMPRESSOR FAILUREIf the System is in Cooling or Dehumidification Mode —After 5 minutes of operation, if the temperature of the in-door coil is not 4°

LEGEND AND NOTES FOR FIG. 24 AND 25AGING — For the Burn-In Test(short terminals)AS — AssemblyC—ContactorCAP — CapacitorCH — Crankcase HeaterCLO — Comp

Fig. 24 — Cooling-Only System (38HDC Shown)RELAY CHARTCOMPRESSOR K13THERMISTOR EQUIVALENCETEMPERATURE RESISTANCE°F °C V95 35 6,50072 22 11,40032 0 32,

Fig. 25 — Heat Pump SystemRELAY CHARTCOMPRESSOR K13REV. VALVE K11OUTDOOR FAN K12THERMISTOR EQUIVALENCETEMPERATURE RESISTANCE°F °C V95 35 6,50072 22 11

START-UP CHECKLISTI. PRELIMINARY INFORMATIONOUTDOOR UNIT: MODEL NO.OUTDOOR UNIT: MODEL NO.SERIAL NO.SERIAL NO.ACCESSORIES: ___________________________

Table 1 — System Combinations for Indoorand Outdoor UnitsSYSTEM INDOOR UNIT OUTDOOR UNITHigh Wall Cooling Only Systems53QNB018 40QNB018 38HDC01853QNB0

START-UP CHECKLIST (cont)HAS PIPING SYSTEM BEEN EVACUATED TO 1000 MICRONS (IF REQUIRED)?HAS SYSTEM CHARGE BEEN WEIGHED IN (IF REQUIRED)?HAVE SERVICE V

1. Dimensions in ( ) are in millimeters.2. Direction of airflow.3. Refrigerant, drain, and power connections may be made in unit rear, bot-tom, left si

Step 3 − Mount Mounting Bracket on Wall1. Decide how refrigerant will be piped. If necessary, knockout the appropriate pre-punched holes (Fig. 4) on u

If mounting bracket is not mounted level, the indoor sec-tion will be mounted unevenly, and condensate drain-age water may drip onto the floor. Also, a

NOTE: No AccuRatert is required on 38HDS sys-tems. The 38HDS systems have a TXV (thermostaticexpansion valve) in the condensing unit for refriger-ant

Step 5 — Connect Condensate Drain Line —Observe all local sanitary codes when installing condensatedrains.1. Connect drain line by inserting a5⁄8-in.

Table 5 — Electrical DataINDOORUNIT40QNV (Single-Ph, 60 Hz)OPERATING VOLTAGE* FANWATTS MCAMAX FUSEOR HACR TYPECKT BKR AMPSMax Min LRA FLAB018208/230 2

Step 7 − Make Connections to the Outdoor UnitCOOLING-ONLY SYSTEMS − To connect the 38HDC orHDS condensing unit to the fan coil unit(s) so that the sys