Carrier 38BK-018 Specifications

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

Table 4F — Physical Data — 40QNH High Wall Fan Coil UnitsUNIT 40QNH 018 024NOMINAL CAPACITY (Tons) 11⁄22NOMINAL SIZE (Btuh) 18,000 24,000OPERATING WEI

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

Step 6 — Make Electrical Connections — Be surefield wiring complies with local building codes and NEC,and unit voltage is within limits shown in Table

Step 7 — Make Connections to the Outdoor UnitCOOLING-ONLY SYSTEMS — To connect the 38HDC,HDL or HDS condensing unit to the fan coil unit(s) so thatthe

START-UPComplete the following checks and the Start-Up Check-list on page CL-1 before system start-up. Refer to outdoorunit installation, start-up and

After Extended Shutdowns — If the system has beenturned off for more than 12 hours, turn on the indoor andoutdoor unit disconnect switches to supply p

• Cooling Mode — When the Cooling mode is selected, theindoor fan will operate continuously at the selected speedif the speed is high, medium, or low.

• Automatic Operation Mode for Cooling Only Systems(38HDC, HDL, and HDS) — The unit samples the air inthe room. Based on the room temperature, the uni

CLEANING AND MAINTENANCETo avoid the possibility of electric shock, before per-forming any cleaning and maintenance operations, al-ways turn off power

To Set the Current TimeTA1. Press the button (located on the back of the remotecontroller; see Fig. 23) with an instrument screwdriver orsimilar small

Table 1 — System Combinations for Indoorand Outdoor UnitsSYSTEM INDOOR UNIT OUTDOOR UNITHigh WallCoolingOnly40QNB018 38HDC,L01840QNB024 38HDC,L024(2)

SERVICEWhen servicing unit, turn off all electric power to unitto avoid shock hazard or injury from rotating parts.Do not vent refrigerant to atmosphe

Table 10 — 40QN Thermistor Properties*TEMP(F)MINIMUMOHMSNOMINALOHMSMAXIMUMOHMSMINIMUMTHERMISTORVOLTS — DCNOMINALTHERMISTORVOLTS — DCMAXIMUMTHERMISTORV

LEGENDNEC — National Electrical CodePipingLine Voltage24 VThermistor*Standard.†Field supplied.NOTES:1. All piping must follow standard refrigerant pip

LEGEND AND NOTES FOR FIG. 26-28AGING — For the Burn-In Test (short these terminals)AS, ASS’Y — AssemblyC—ContactorCAP — CapacitorCH — Crankcase Heater

40QNH018, 024 FAN COIL38BK018, 024 OUTDOOR SECTIONFig. 26 — 40QNH Fan Coil Unit with 38BK Outdoor Heat Pump Unit24

40QNB018, 024 FAN COIL38HDC018, 024 OUTDOOR SECTION*38HDC018 ONLY.Fig. 27 — 40QNB Fan Coil Unit with 38HDC Cooling Only Outdoor Condensing Unit25

40QNB018, 024 FAN COIL38HDL018, 024 OUTDOOR SECTIONFig. 28 — 40QNB Fan Coil Unit with 38HDL Cooling Only Outdoor Condensing UnitCopyright 1999 Carrier

START-UP CHECKLISTI. PRELIMINARY INFORMATIONOUTDOOR UNIT: MODEL NO.INDOOR UNIT: MODEL NO.SERIAL NO.SERIAL NO.ACCESSORIES: ____________________________

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

1. Dimensions in ( ) are in millimeters.2. Direction of airflow.3. Refrigerant, drain, and power connections may be made in unitrear, bottom, left side

Table 3 — High Wall Unit Package ContentsITEM QUANTITYUnit Mounting Template 1Unit Mounting Bracket 11-in. Lag Screws For Unit Mounting 8Hollow Wall A

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

d. Install factory-supplied flare connection and Accu-Rater metering device in liquid line at the fan coil uniton 38HDC, HDL and 38BK systems (Fig. 9).

Table 4A — Physical Data — 38HDC Condensing UnitsUNIT 38HDC 018 024NOMINAL CAPACITY (Tons) 11⁄22OPERATING WEIGHT (lb) 150 154REFRIGERANT TYPE R-22Cont

Table 4C — Physical Data — 38HDS Condensing UnitsUNIT 38HDS 024 048NOMINAL CAPACITY (Tons) 24OPERATING WEIGHT (lb) 159 292REFRIGERANT TYPE R-22Control

Table 4E — Physical Data — 38BK018, 024 Outdoor Heat Pump UnitsUNIT 38BK018* 38BK024*NOMINAL CAPACITY (Tons) 11⁄22OPERATING WEIGHT (lb) 154 167REFRIGE