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Carrier 38VMA036HDS3-1, Installation And Maintenance Instructions Manual, Page: 1 / 16

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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 20-38VMH002-01

Printed in U.S.A.

Form 38VMH-1P-2SI

Pg 1 

01-20

Replaces: 38VMH-1P-1SI

Installation and Maintenance Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

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GENERAL

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INSTALLATION

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Step 1 — Unpack and Inspect Units

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Step 2 — Position the Unit 

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Step 3 — Connect Refrigerant Piping and Wiring

 5

Step 4 — Pressure and Vacuum Test System

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Step 5 — Adjust Refrigerant Charge

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Step 6 — Complete Electrical Connections

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START-UP

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Trial Run

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Error Codes

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Unit Settings

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Pre-Start Check 

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MAINTENANCE

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SAFETY CONSIDERATIONS

Improper  installation,  adjustment,  alteration,  service,

maintenance, or use can cause explosion, fire, electrical shock,

or other conditions, which may cause death, personal injury or

property damage. The qualified installer or agency must use

factory-authorized  kits  or  accessories  when  modifying  this

product.

Follow  all  safety  codes.  Wear  safety  glasses,  protective

clothing,  and  work  gloves.  Use  quenching  cloth  for  brazing

operations.  Have  fire  extinguisher  available.  Read  these

instructions  thoroughly  and  follow  all  warnings  or  cautions

included in  literature and  attached to  the  unit.  Consult  local

building  codes  and  the  current  editions  of  the  National

Electrical  Code  (NEC)  ANSI/NFPA  (American  National

Standards Institute/National Fire Protection Association) 70. In

Canada, refer to the current editions of the Canadian Electrical

Code CSA (Canadian Standards Association) C22.1.

Understand the signal words — DANGER, WARNING, and

CAUTION.  DANGER  identifies  the  most  serious  hazards,

which  will  result  in  severe  personal  injury  or  death.

WARNING  signifies  hazards  that  could  result  in  personal

injury or death. CAUTION is used to identify unsafe practices,

which  would result in minor personal injury  or product and

property damage.

Recognize  safety  information.  This  is  the  safety-alert

symbol ( ). When this symbol is displayed on the unit and in

instructions or manuals, be alert to the potential for personal

injury. Installing, starting up, and servicing equipment can be

hazardous due to system pressure, electrical components, and

equipment location.

WARNING

Electrical shock can cause personal injury and death. Shut

off all power to this equipment during installation. There

may  be  more  than  one  disconnect  switch.  Tag  all

disconnect  locations  to  alert  others  not  to  restore  power

until work is completed.

38VMH036-060

Outdoor Unit for

Single-Phase Variable Refrigerant Flow (VRF) Heat Pump Systems

Summary of Contents for 38VMA036HDS3-1

Page 1: ...and follow all warnings or cautions included in literature and attached to the unit Consult local building codes and the current editions of the National Electrical Code NEC ANSI NFPA American National Standards Institute National Fire Protection Association 70 In Canada refer to the current editions of the Canadian Electrical Code CSA Canadian Standards Association C22 1 Understand the signal wor...

Page 2: ...omponent The system contains oil and refrigerant under pressure To remove a component wear protective gloves and goggles and proceed as follows a Shut off electrical power to unit b Recover refrigerant to relieve all pressure from the system using both high pressure and low pressure ports c Traces of vapor should be displaced with nitrogen and the work area should be well ventilated Refrigerant in...

Page 3: ...0 Rated kBtu h 36 48 60 HEATING CAPACITY WITH NON DUCTED DUCTED INDOOR UNITS Nominal kBtu h 40 52 5 66 Rated kBtu h 40 52 5 66 ELECTRICAL CHARACTERISTICS WITH NON DUCTED INDOOR UNITS Cooling Power Consumption kW 3 10 4 60 6 10 EER Btu Wh 12 10 11 00 9 50 SEER Btu Wh 19 20 19 20 18 60 Heating Power Consumption kW 3 10 4 30 5 80 COP W W 3 62 3 42 3 19 HSPF Btu Wh 9 20 9 20 10 00 ELECTRICAL CHARACTER...

Page 4: ...ainst hostile environments theft vandalism and debris on jobsite Do not allow foreign material to fall into unit Failure to do so may have serious adverse effects on unit operation Failure of any unit caused by deposits of foreign material inside unit will not be covered by manufacturer s warranty Some units and or job conditions may require some form of temporary covering during construction PREP...

Page 5: ... Create an outlet near the base for drainage Refer to Fig 7 below for main drain connection Fig 7 Drain Connections Ensure the roof can handle the unit weight if mounted on the roof Step 3 Connect Refrigerant Piping and Wiring Refrigerant pipe connections are made on the side of the unit Remove the L shaped metal plate and route piping through the exposed opening Route power and control wiring thr...

Page 6: ...tions Use pipe adapter Components Shipped with Unit Page 2 when main pipe diameter for suction line is 5 8 inch CAUTION During brazing keep nitrogen in pipes to avoid oxidation inside the pipes Use soapy water or refrigerant leak detector to verify every joint in the refrigeration piping Fig 8 Piping and Control Wiring Connections Fig 9 Piping and Control Wiring Locations 38VMH UNIT CAPACITY tons ...

Page 7: ...or correct positioning of the joint Fig 12 Correct Branch Joint Positioning Install the branch joints properly to avoid oil accumulating in the system DESCRIPTION ALLOWABLE VALUE ft PIPES Piping Length Total Pipe Length 492 L1 L2 L3 L4 L5 L6 A B C D E Maximum Piping Length L Actual Length 296 L1 L3 L4 L5 L6 E Equivalent Length 328 First Branch to Farthest Indoor Unit 131 L3 L4 L5 L6 E Height Diffe...

Page 8: ...e and carefully re lease liquid refrigerant into the suction service port If the total calculated charge amount is added completely to the system the charging process is finished Step 6 Complete Electrical Connections See Fig 14 for a diagram of the unit s internal power and control wiring PIPE SIZE ON LIQUID SIDE in REFRIGERANT TO BE ADDED PER FOOT lb ft 1 4 0 015 3 8 0 040 1 2 0 080 5 8 0 120 3 ...

Page 9: ...9 Fig 14 Typical Wiring Diagram ...

Page 10: ...rce Power entry is on the right side of the unit when facing the fan grille or front of the unit Terminals for field power supply are suitable for copper conductors See Fig 15 and 16 for power wiring Main Power Bring wires from the disconnect switch through the knockout hole at the bottom right corner of the unit to the control box CAUTION Operating the unit on improper supply voltage or with exce...

Page 11: ...mes from the control board in the outdoor unit and does NOT require a separate source Use of 2 core stranded shielded cable is required Shield is used to protect the signal from interference The control wire between outdoor and indoor units is bus type See Fig 19 for communication wiring COMMUNICATION WIRING Communication wire must be wired as shown in Fig 8 and 19 Do not route communication wire ...

Page 12: ...9 L10 L11 L3 L3 L3 L3 Indoor unit 1 Indoor unit 2 Indoor unit 4 Indoor unit 5 Indoor unit 6 Indoor unit 3 P Q HA HB HA HB HA HB HA HB HA HB HA HB HA HB HA HB HA HB HA HB HA HB HA HB NOTE Power from IDU NOTE 24 v AC Power Maximum wiring length L1 L3 3937 ft 18AWG 2 Core Stranded Shield L5 3937 ft 18AWG 2 Core Stranded Shield L6 L7 L8 L9 820 ft 18 AWG 2 Core Stranded Shield L10 L11 820 ft 18 AWG 2 C...

Page 13: ...of error codes Table 10 List of Error Codes CAUTION NEVER CONNECT the main power source to the control or communication terminal block USE ANAPPROPRIATE SCREWDRIVER for tightening the terminal screws Do not over tighten the terminal screws Failure to follow these procedures may result in personal injury or damage to equipment ERROR CODE EXPLANATION E2 Communication error between indoor unit and ou...

Page 14: ...utomatic addressing Cooling priority mode Non automatic addressing factory default First running priority mode Clear IDU address Heating mode only Fahrenheit temperature factory default Cooling mode only Celsius temperature ENC1 Function Definition factory use only ENC2 Function Definition For factory use only ODU network address dial up Only 0 7 used ...

Page 15: ...on outdoor units are fully open If these valves are not fully open equipment damage may occur MAINTENANCE The following are recommended guidelines Jobsite conditions may say that maintenance schedule be performed more often than recommended here EVERY 3 MONTHS Check coil condition Clean the coil if necessary EVERY 6 MONTHS Follow the 3 month maintenance schedule In addition Check for and remove de...

Page 16: ... to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 20 38VMH002 01 Printed in U S A Form 38VMH 1P 2SI Pg 16 01 20 Replaces 38VMH 1P 1SI Carrier Corporation 2020 ...

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