Carrier 38QB User Manual

Number OneAirConditbninqMakereInstallation, Start-Up and Service InstructionsDivision of Carrier CorporationCarrier Parkway • Syracuse NY 13221Heat Pu

coil section. Lift fan orifice/control ring after pinching and pressing down on 3 plastic pins of tube supports.5. Remove louvered casing by ta

(kPa)PRESSURE AT SUCTION SERVICE VALVEFig. 10 — 38QB018 with 28HQ,VQ024, 40AQ024, or 40DQ024 Cooling Cycle Charging ChartFig. 12 — 38QB024with 28HQ,VQ

PSIG(kPa)62 64 66 68 70 72 74 76 78 80 82 84(427) (441) (455)(469)(483)(496)(5I0) (524)(538)(552) (565)(579) PRESSURE AT SUCTION SERVICE VA

64 68 72 76 80 84PSIG (441) (469) (496) (524) (552) (579)(kPa) PRESSURE AT SUCTION SERVICE VALVEFig. 18 — 38QB042 with 40QB,QH042, 28HQ,VQ

360(2482)340(2344)3 300 > (2069) 01aS 280 5 (1931)!;I 260« (1793)240(1655)220(1517)ÌFH-r^. ;TT: (li4 ì it-4 f4-rii^P 62 F pi (I6.6C)Pi:|T|C=•1

With a low-side leak there is always some pressure in the liquid line. However, compressor motor temperature increases because of insufficient s

MAINTENANCEFig. 25 — Carrier Compatible FittingCondenser Fan Motor Removal1. Shut off power to unit. Failure to do so may result in electr

3. Clean coil using vacuum cleaner and its crevice tool (see Fig. 27). Work crevice tool vertically making sure tool only touches

TROUBLESHOOTIIMG CHART — COOLING CYCLE

TROUBLESHOOTING CHART — HEATING CYCLEVO

^ Table 1 — Carrier Approve^^6^ SystemsOUTDOORUNIT38QBREQUIREDOUTDOORPISTONSIZEINDOOR UNIT MODEL 8i SIZEREQUIREDINDOORPISTONSIZE0153828HQ.VQ018 40AQ01

For replacement items use Carrier Specified PartsManufacturer reserves the right to discontinue, or change at any time, specifications or designs with

I'-O" (305 mm) GRAVEL APRONГ-И" (584mm) DIAM‘marker tape(HIDDEN)б" (152 mm)THICKCONCRETE MOUNTING PAD FOR 38QB0I52-6" (762mm)

Table 3 — AccessoriesPART NO.DESCRIPTIONUNIT 38QB99TZ90040106Low-Voltage Control — Honeywell Thermostat HH07AT171 and Thermostat Subbase HH93AZ1

REPLACE THE ACCURATER™ REFRIGERANT CONTROL PISTON IN THE INDOOR COIL AS REQUIRED before connecting refrigerant lines. See Table I.

Table 4 — Electrical Data (60 Hz)UNIT38QBV/PHOPERVOLTAGE*COMPRFANFLABRANCH CIRCUITMin Wire Size (AWG)tMax \'Vire ; 1 Min Gnd Wire SizelMax Fuse**

THERMOSTATANDSUBBASE40AQ OR 40QB FAN COIL COOLING CONTROL KIT TERMINAL BOARD380BTERMINALBOARD(38QB/40AQ 0R40QB WITHOUT ELECTRIC HEATER)THERMOSTATANDSU

MOUNT SUPPLEMENTAL HEAT RELAY in convenient location on indoor unit. Attach with sheet metal screw.To Start Unit — (Make sure crankcas

Table 6 — Service DataTable 7 — Compressor Data (60 Hz)UNIT 38QB 015018 024030 036 042048;060R-22CHG (lb)406 27 27 3 7 8 8 58 68 0AccuRator-'-&ap