Carrier 380B User Manual

iNjumber OneAirConditbningMakerDivision of Carrier CorporationHeat Pump — Outdoor SectionINDEXPageINSTALLATION...

connect high- and low-voltage power wiring; and replace louvered casing.13. Replace top cover by running 4 screws into orifice loosely (2 on each sid

PSIG(kPa)(427) (441) (455)(469) (483) (496)(5I0) (524)(538)(552) (565)(579) PRESSURE AT SUCTION SERVICE VALVEFig. 12 — 38QB030 with 28HQ,VQ036 or 40AQ

220(1517)PSIG(kPa)68 72 76 80 84(469) (496) (524) (552) (579)PRESSURE AT SUCTION SERVICE VALVEFig. 16 — 38QB042 with 40QB042 or 28HQ,VQ048Cool

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

Remove tubing section remaining in threaded portion of fitting. Discard locknut.Clean, flux, and insert new tube end into remaining portion of

nFig. 22 — Positioning Hose to Spray Coil15

TROUBLESHOOTING CHART — COOLING CYCLEOs

TROUBLESHOOTING CHART — HEATING CYCLE

For replacement items use Carrier Specified Parts.Manufacturer reserves the right to discontinue, or change at any time, specifications or designs wit

4'-0"(l220mm) OVERHEAD SPACE REQUIRED FOR SERVICE AND AIRFLOW^ (22 mm) DIAM HOLE FOR CONTROL WIRINGl|"(35mm) DIAM HOLE FOR POWER WI

Table 2 — Installation Data (Fig. 1)required replacement piston is factory supplied with specified 38QB outdoor unit. Replace piston as describe

Table 3 — AccessoriesPART NO.38CQ90008138CQ90011138QB9000210638HQ900001128VQ90001138RQ90008138RQ90000138HQ90000238CQ90017238RQ900091DESCRIPTIONLow-Vol

rREPLACE THE ACCURATER™ REFRIGERANT CONTROL PISTON IN THE INDOOR COIL AS REQUIRED before connecting refrigerant lines. See Table 1. Correct pi

THERMOSTAT SUBBASE HH93AZI73 OR HH93AZI7540AQ OR 40QB FAN COIL COOLING CONTROL KIT TERMINAL BOARD38QBTERMINALBOARDCOOLING AND ONE-STAGE HEATING (38QB/

INSTALL A BRANCH CIRCUIT DISCONNECT PER NEC of adequate size to handle unit starting current. Provide a separate disconnect for outdoor unit, indoor u

Table 6 — Service DataRefrigerant Charging — The 38QB units contain correct operating charge for complete system when connected to28HQ,VQ,40QB or 40

6. From intersect point, project vertically downward to chart suction pressure line. Compare chart suction pressure to unit suction pressu