Carrier 38VMH072 Series Installation And Maintenance Instructions Manual
Carrier 38VMH072 Series Installation And Maintenance Instructions Manual

Carrier 38VMH072 Series Installation And Maintenance Instructions Manual

Outdoor unit for variable refrigerant flow (vrf) heat pump systems

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Installation and Maintenance Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step 1 - Unpack and Inspect Units . . . . . . . . . . . . 9
Step 2 - Position the Unit . . . . . . . . . . . . . . . . . . . 10
MAINTENANCE
CONNECTIONS
• REFRIGERATION PIPING MEASUREMENTS
Step 5 - Adjust Refrigerant Charge . . . . . . . . . . . . 19
BLOCK
WIRING
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23, 24
Trial Run. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Unit Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Advanced Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Snow-Blowing Functions. . . . . . . . . . . . . . . . . . . . . . 25
Pre-Start Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 18-38VMH001-01
Variable Refrigerant Flow (VRF) Heat Pump Systems
Page
Printed in U.S.A.
Form 38VMH-3SI

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.
Pg 1
10-18
38VMH072-432
Outdoor Unit for
Replaces: 38VMH-1SI

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Summary of Contents for Carrier 38VMH072 Series

  • Page 1: Table Of Contents

    38VMH072-432 Outdoor Unit for Variable Refrigerant Flow (VRF) Heat Pump Systems Installation and Maintenance Instructions CONTENTS SAFETY CONSIDERATIONS Page Improper installation, adjustment, alteration, service, SAFETY CONSIDERATIONS ....1 maintenance, or use can cause explosion, fire, electrical shock, GENERAL .
  • Page 2: General

    WARNING CAUTION When installing the equipment in a small space, provide DO NOT re-use compressor oil or any oil that has been adequate measures to avoid refrigerant concentration exposed to the atmosphere. Dispose of oil per local codes exceeding safety limits due to refrigerant leak. In case of and regulations.
  • Page 3 Table 1 — Components Shipped with Unit NAME SHAPE QUANTITY FUNCTION Seal plug For maintenance Simple wrench For removing the side plate screws (Sizes 072, 096, and 120) 90 degree elbow (Size 144) For outdoor unit and refrigerant pipe connection Connective pipe accessories (Sizes 072, 096, and 120 only)
  • Page 4 Table 2 — 38VMH Physical Data UNIT NOMINAL TONS (Ton) 208/230-3-60 / 460-3-60 POWER SUPPLY (V-Ph-Hz)* COOLING CAPACITY WITH NON-DUCTED INDOOR UNITS† 72.0 90.0 117.6 142.8 Nominal (kBtu/h) 69.0 92.0 112.0 136.0 Rated (kBtu/h) HEATING CAPACITY WITH NON-DUCTED INDOOR UNITS† 80.0 108.0 126.0...
  • Page 5 Table 3 — 38VMAH 208/230V Combination Units (2 Units) COMBINATION UNIT MODEL NUMBER Combination Units NOMINAL CAPACITY (tons) 208/230-3-60 POWER SUPPLY (V-Ph-Hz)* COOLING CAPACITY WITH NON-DUCTED INDOOR UNITS† 163.8 184.8 205.8 224.7 258.3 283.5 Nominal (kBtu/h) 156.0 176.0 196.0 214.0 246.0 270.0 Rated (kBtu/h)
  • Page 6 Table 4 — 38VMAH 460V Combination Units (2 Units) COMBINATION UNIT MODEL NUMBER Combination Units NOMINAL CAPACITY (tons) 460-3-60 POWER SUPPLY (V-Ph-Hz)* COOLING CAPACITY WITH NON-DUCTED INDOOR UNITS† 163.8 184.8 205.8 224.7 258.3 283.5 Nominal (kBtu/h) 156.0 176.0 196.0 214.0 246.0 270.0 Rated (kBtu/h)
  • Page 7 Table 5 — 38VMAH 208/230V Combination Units (3 Units) COMBINATION UNIT MODEL NUMBER Combination Units NOMINAL TONS (Ton) 208/230-3-60 POWER SUPPLY (V-Ph-Hz)* COOLING CAPACITY WITH NON-DUCTED INDOOR UNITS† 298.2 319.2 342.3 373.8 399.0 420.0 Nominal (kBtu/h) 284.0 304.0 326.0 356.0 380.0 400.0 Rated (kBtu/h)
  • Page 8 Table 6 — 38VMAH 460V Combination Units (3 Units) COMBINATION UNIT MODEL NUMBER Combination Units NOMINAL TONS (Ton) 460-3-60 POWER SUPPLY (V-Ph-Hz) * COOLING CAPACITY WITH NON-DUCTED INDOOR UNITS † 298.2 319.2 342.3 373.8 399.0 420.0 Nominal (kBtu/h) 284.0 304.0 326.0 356.0 380.0...
  • Page 9: Installation

    52-3/4 NOTE: All dimensions shown in inches. Fig. 2 — 38VMH Dimensions INSTALLATION company. All units should be stored in the factory shipping carton with internal packaging in place until installation. Step 1 — Unpack and Inspect Units — Units are PROTECTING UNITS FROM DAMAGE —...
  • Page 10: Preparing Jobsite For Unit Installation

    PREPARING JOBSITE FOR UNIT INSTALLATION — Forklift handling: — When using a forklift for lifting or transporting the unit, insert the prongs of the forklift into the To save time and to reduce the possibility of costly errors, set rectangular holes as shown in Fig. 5. up a complete sample installation in a typical location at jobsite.
  • Page 11: Concrete Base Requirements

    CONCRETE BASE REQUIREMENTS SPACE REQUIRED FOR INSTALLATION AND MAINTENANCE — Ensure there is enough space provided • The unit’s base must be made of solid concrete. for installation and maintenance; see Fig. 10 below. • Ensure that the base is level and that the weight of the unit is distributed evenly.
  • Page 12: Snow Guard Installation

    If the outdoor unit is lower than the surrounding obstacles, Rotate the upright posts 5 to 10 degrees, lift them up about 2 add a field-supplied duct to deflect condenser air flow as mm to remove as shown in Fig. 16. shown below in Fig.
  • Page 13 NOTE: The rubber gasket is to prevent nesting of animals. LEGEND 1 — Liquid side ball valve (high pressure) 2 — Gas side ball valve (Low pressure) 3 — Service port (For pressure testing and refrigerant charging) Fig. 20 —Accessory Connecting Pipes 4 —...
  • Page 14 Fig. 21 —Piping Lengths and Drop Height Table 7 — Permitted Pipe Lengths and Drop Heights DESCRIPTION ALLOWABLE VALUE (ft) PIPES Total Extension of Pipe La + Lb + Lc + Ld + A + (B + C + D Actual Length 3280 (Liquid Pipe)
  • Page 15: Connecting The Outdoor Units

    CONNECTING THE OUTDOOR UNITS 4. The branch joint must be installed parallel to the ground, and the angle of the joint should not be greater than 10 1. When connecting the refrigerant pipes between outdoor degrees. Positioning the branch joint more than 10 units, the pipes should be placed horizontally.
  • Page 16 Fig. 24 —Correct Branch Joint Installation LEGEND — See Table 9 — See Table 10 — See Table 11 — See Table 12 — See Table 13 — See Table 14 — See Table 15 Fig. 25 —Typical Refrigerant Piping Layout...
  • Page 17 Table 9 — Outdoor Unit Connecting Pipe 38VMAH UNIT SIZE GAS SIDE (in.) LIQUID SIDE (in.) Table 10 — Oil Balancing Pipe Between Outdoor Unit OUTDOOR UNIT CAPACITY (kBtu/h) BALANCING PIPE (in.) 168 and above Table 11 — Main Pipe Selection SIZE OF THE MAIN PIPE WHEN THE SIZE OF THE MAIN PIPE WHEN THE EQUIVALENT EQUIVALENT LENGTH OF LIQUID PIPE IS...
  • Page 18 Table 16 — Branch Joint HEAT INSULATION PART NO. LOW-PRESSURE GAS SIDE JOINT (IN.) LIQUID SIDE JOINTS (IN.) MATERIAL 40VM900021 (2 sets) 40VM900022 (4 sets) 40VM900031 (2 sets) 40VM900032 (2 sets) 40VM900033 (2 sets) 40VM900034 (2 sets) 40VM900035 (2 sets)
  • Page 19: Step 4 - Pressure And Vacuum Test System

    Step 4 — Pressure and Vacuum Test All service valves on the outdoor units should remain fully closed. System — After completing the refrigerant piping, perform the following pressure test: R-410A refrigerant should be added (in liquid state) at the liquid line service port on the header unit.
  • Page 20: Opening And Closing The Electrical

    Table 18 — 38VMAH Electrical Data SUPPLY POWER SUPPLY VOLTAGE 38VMAH UNIT POWER SIZE MCA* MOPD SUPPLY (V-Ph-Hz) 208/230-3-60 460-3-60 Fig. 29 —Remove the Cover Plate POWER WIRING — Installation of wiring must conform LEGEND with local codes and with NEC ANSI/NFPA 70, current —...
  • Page 21: Wiring The Communication Terminal

    820 ft between the wired controller and indoor units. Communication wires are sold separately but can be obtained through Carrier. Figure 34 below shows a typical communication wire from Carrier. Fig. 34 —Typical Communication Wire...
  • Page 22 Touch screen wired controller outdoor unit Centralized controller NOTE: 24 v. AC Power HA HB Indoor unit 1# Indoor unit 2# Indoor unit 3# Indoor unit 4# wired controller NOTE: Power from IDU HA HB MAXIMUM WIRING LENGTH L1+L3 < 3937 ft. 18AWG, 2-Core Stranded Shield L5 <...
  • Page 23: Communication Wiring

    Fig. 40 —Connecting The Communication Wires If for any reason it is not possible to buy communication wires from Carrier, connect the indoor unit side of the communication wires using the connector provided with the accessories as shown in Fig. 41 below.
  • Page 24: Unit Settings

    Unit Settings Symbol Switch Status Function Remark Auto mode (Default) Cooling priority mode Indoor unit priority mode (IUD #63) or majority mode Heating mode only Cooling mode only Automatic search address (Default) Manual search address Clear indoor units address Header unit Follower unit ENC1 Outdoor unit address dial switch...
  • Page 25: Advanced Settings

    Advanced Settings Snow-Blowing Function 1. Press SW5 button on spot check box of the header • Hold the “MENU (SW4)” button down for five seconds outdoor unit to enter the snow-blowing function. It will to enter the menu. display “Sn0” for 15 seconds. •...
  • Page 26: Maintenance

    • Be sure all electrical connections are secure. • Check the heating and cooling action to confirm proper operation. © Carrier Corporation 2018 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 18-38VMH001-01 Printed in U.S.A.

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