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A94328

SERVICE TRAINING

Packaged Service Training programs are an excellent way to increase your 
knowledge of the equipment discussed in this manual, including:

• Unit Familiarization

• Maintenance

• Installation Overview

• Operating Sequence

A large selection of product, theory, and skills programs is available, using popular 
video-based formats and materials.  All include video and/or slides, plus companion 
book.

Classroom Service Training plus "hands-on" the products in our labs can mean 
increased confidence that really pays dividends in faster troubleshooting, fewer 
callbacks.  Course descriptions and schedules are in our catalog.

CALL  FOR  FREE  CATALOG  1-800-962-9212

[  ] Packaged Service Training

[  ] Classroom Service Training

Copyright 1998 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231

38yda2si

Manufacturer 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 101

Catalog No. 563-717

Printed in U.S.A.

Form 38YDA-2SI

Pg 20

11-98

Replaces: 38YDA1SI

Summary of Contents for 38YDA

Page 1: ...rom improper installation of equipment 1 Locate unit away from windows patios decks etc where unit operation sound may disturb customer 2 Ensure that vapor and liquid tube diameters are appropriate to...

Page 2: ...door operating ambient in cooling mode is 55 F and the maximum outdoor operating ambient in cooling mode is 125 F The maximum outdoor operating ambient in heating mode is 66 F Step 5 Elevate Unit Accu...

Page 3: ...uct Data Sheet for factory approved indoor units Outdoor unit contains correct system refrigerant charge for opera tion with indoor unit of same size when connected by 15 ft of field supplied or facto...

Page 4: ...for 2 speed units Do not attempt to operate unit below 55 F in cooling mode or modify control system for low ambient operation Compressor dam age may occur Available electrical accessories include lat...

Page 5: ...ate unit in a vacuum or at negative pressure Do not disable low pressure switch In scroll compressor applications Dome temperatures may be hot To prevent personal injury wear safety glasses protective...

Page 6: ...LE THERMOSTAT MODEL 2S TYPICAL FAN COIL TWO SPEED HEAT PUMP See notes 7 8 9 and 11 W2 G W2 O R W3 R L H R1 COOL HEAT STAGE 1 COOL HEAT STAGE 2 24 VAC HOT Y Y2 A D A97498 R C C Y1 W3 O TYPICAL FAN COIL...

Page 7: ...UMPER J2 JUMPER TWO SPEED HEAT PUMP See notes 7 8 9 11 and 23 DH Y1 Y1 W W1 O W2 Y1 W2 O W1 Y Y2 Y2 W2 W3 Y Y2 O W2 COOL HEAT STAGE 1 COOL HEAT STAGE 2 HEAT STAGE 3 RVS COOLING H A98628 R Y2 R Y2 C C...

Page 8: ...FURNACE TWO SPEED HEAT PUMP See notes 7 9 11 14 and 24 W R Y1 R O W2 G L W3 Y H R1 FAN HEAT STAGE 3 RVS COOLING 24 VAC HOT K A98587 24 VAC HOT 24 VAC COMM HEAT STAGE 3 R C G W W1 Y Y2 R C RVS COOLING...

Page 9: ...C Y2 W3 W2 R Y1 O C DHUM HUM B S1 S2 R C HEAT STAGE 3 COOL HEAT STAGE 2 RVS COOLING FAN 24 VAC HOT 24 VAC COMM N A HUMIDIFY See notes 7 11 14 15 16 17 18 and 25 N A OUTDOOR SENSOR CONNECTION Y Y2 HUM...

Page 10: ...W2 Y1 W2 24 VAC COMM N A OUTDOOR SENSOR CONNECTION C B S1 S2 CARRIER PROGRAMMABLE THERMOSTAT MODEL 2S G H R1 FAN HEAT STAGE 3 COOL HEAT STAGE 2 RVS COOLING 24 VAC HOT P A97497 24 VAC HOT 24 VAC COM HE...

Page 11: ...CE WITH ICM BLOWER MOTOR TWO SPEED HEAT PUMP See notes 6 7 9 11 12 14 21 and 24 R Y1 R O G L W3 W W1 Y Y2 W2 Y1 COOL HEAT STAGE 2 FAN HEAT STAGE 3 RVS COOLING 24 VAC HOT W A97496 R C C W2 TWO STAGE VA...

Page 12: ...3 W2 O C DHUM HUM B S1 S2 R W2 O Y1 R COM HUM PL9 10 DEHUM HEAT STAGE 3 HEAT COOL STAGE 1 HEAT COOL STAGE 2 RVS COOLING FAN 24 VAC HOT 24 VAC COM DEHUMIDIFY HUMIDIFY N A OUTDOOR SENSOR CONNECTIONS Y Y...

Page 13: ...t pump MUST have a high pressure switch for dual fuel applications 15 Outdoor air temperature sensor must be attached in all dual fuel applications 16 Thermidistat Dip Switch 1 should be set in the ON...

Page 14: ...w Selection for 58MVP Furnaces CFM 38YDA UNIT SIZE HIGH SPEED A C SETUP SWITCH POSITION FURNACE MODEL HEATING SIZE LOW SPEED CF SETUP SWITCH POSITION 060 080 100 A C 1 A C 2 A C 3 High Low High Low Hi...

Page 15: ...ersects measured liquid service valve pressure 6 To obtain required subcooling temperature at a specific liquid line pressure add refrigerant if liquid line temperature is higher than indicated or rec...

Page 16: ...door coil heat and minimize the steam cloud effect SECOND STAGE LATCHING Mechanical thermostats operate with a staging differential of 2 F droop Carrier electronic thermostats are droopless meaning th...

Page 17: ...ature The cycle terminates when coil thermistor reaches 80 F 5 or defrost period reaches a maximum of 10 minutes FURNACE INTERFACE This feature provides a heat pump lockout upon a demand for auxiliary...

Page 18: ...appears at control board If a PTC trip occurs 3 times the control locks out outdoor unit operation and provides a malfunction signal at control PRESSURE SWITCH PROTECTION The outdoor unit is equipped...

Page 19: ...s the resistance decreases A thermistor is used to sense outdoor ambient Refer to Fig 14 for resistance values versus temperature If outdoor ambient thermistor should fail a malfunction signal appears...

Page 20: ...e Training plus hands on the products in our labs can mean increased confidence that really pays dividends in faster troubleshooting fewer callbacks Course descriptions and schedules are in our catalo...

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