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Carrier 38QR018C-060C, Installation, Start-Up And Service Instructions Manual

The Carrier 38QR018C-060C model is a high-quality HVAC system designed for optimal performance. For detailed installation, start-up, and service instructions, download the free manual from our website. This comprehensive guide will ensure you get the most out of your Carrier product. Download it now for hassle-free maintenance.

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TROUBLESHOOTING CHART — HEATING CYCLE

LEGEND

NC

— Normally Closed

ODT — Outdoor Thermostat

NOTE: For systems with indoor units equipped with microprocessor
control, see separate controls, service, and troubleshooting manual.

12

Summary of Contents for 38QR018C-060C

Page 1: ...gloves Use quenching cloth for brazing operations Have fire ex tinguisher available Read these instructions thoroughly Con sult local building codes and National Electrical Code NEC for special insta...

Page 2: ...6C 3 7 sq ft 34 m2 5 Do not use screws longer than 1 2 in 13 mm near return air opening UNIT WEIGHT LB KG DIMENSIONS in mm A B C 38QR018C 154 70 13 329 5 8 15 88 3 8 9 53 38QR024C 167 76 38QR030C 180...

Page 3: ...longer than 1 2 in 13 mm near return air opening UNIT WEIGHT LB KG DIMENSIONS in mm A B C 38QR036C 249 113 13 11 16 28 97 7 8 22 22 3 8 9 53 38QR048C 252 114 1311 16 28 97 7 8 22 22 3 8 9 53 38QR060C...

Page 4: ...s should be used and fastened through slots pro vided in unit mounting feet MOUNTING ON ROOF Mount unit on a level platform or frame at least 6 in above roof surface Isolate unit and tubing from struc...

Page 5: ...through piping while brazing to prevent formation of copper oxide To avoid damage while brazing service valves should be wrapped with a heat sinking material such as a wet cloth When brazing tubing s...

Page 6: ...unit in system where voltage may fluctuate above or below permissible limits See Table 2 for recommended fuse sizes When making electrical connections provide clearance at unit for refrig erant pipin...

Page 7: ...meter or continuity tester If necessary refer to Carrier Stand ard System Techniques Manual Chapter 2 for complete information Pumpdown Procedure The system may be pumped down in order to make repairs...

Page 8: ...opens DO NOT attempt to simulate the system abnormalities high pressures pose a serious safety hazard High pressure switch is also checked with an ohmmeter similar to checking low pressure switch If...

Page 9: ...pts the nor mal system heating operation to defrost the outdoor coil if the coil saturated suction temperature indicates freezing temperatures Defrost control board can be field set to check need for...

Page 10: ...wet bulb temperature with a sling psychrometer 6 Refer to Table 3 Find air temperature entering outdoor coil and wet bulb temperature entering indoor coil At this intersection note the superheat temp...

Page 11: ...of Table 5 Heating Operation Pressure Table Fixed Restrictor High Pressure at Suction Valve Low Pressure at Liquid Valve Suction Pressure at Compressor UNIT 38QR INDOOR DRY BULB TEMP F OUTDOOR TEMPERA...

Page 12: ...HOOTING CHART HEATING CYCLE LEGEND NC Normally Closed ODT Outdoor Thermostat NOTE For systems with indoor units equipped with microprocessor control see separate controls service and troubleshooting m...

Page 13: ...TROUBLESHOOTING CHART COOLING CYCLE LEGEND NC Normally Closed NOTE For systems with indoor units equipped with microprocessor control see separate controls service and troubleshooting manual 13...

Page 14: ......

Page 15: ......

Page 16: ...acturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 Tab 5a 5a PC 111 Catalog No 563 882 Printed in U S A...

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