Unitary products group FA120 Installation Manual

Split-system heat pumps indoor units

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INSTALLATION
MANUAL
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 4
AGENCY APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . 4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words: NOTE,
CAUTION, and WARNING. Notes are intended to clarify or
make the installation easier. Cautions are given to prevent
equipment damage. Warnings are given to alert installer
that personal injury and/or equipment damage may result if
installation procedure is not handled properly.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
SPLIT-SYSTEM HEAT PUMPS

INDOOR UNITS

MODEL: FA120
035-18555-001-B-0203

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Summary of Contents for Unitary products group FA120

  • Page 1: Indoor Units

    MAINTENANCE ......18 See the following page for a complete Table of Contents. MODEL: FA120 NOTES, CAUTIONS AND WARNINGS Installer should pay particular attention to the words: NOTE, CAUTION, and WARNING.
  • Page 2: Table Of Contents

    AGENCY APPROVALS..... . . 4 RETURN AIR GRILLE FA120 ....9 INSPECTION .
  • Page 3: Nomenclature

    A = None Voltage 6 = 208/230-460-3-60 Installation Options A = None Additional Options AA = None Product Generation 1 = 1st Generation 2 = 2nd Generation Product Style A = Style A B = Style B Unitary Products Group...
  • Page 4: General

    As soon as a unit is received, it should be inspected for possi- ble damage during transit. If damage is evident, the extent of the damage should be noted on the carrier’s freight bill. A separate request for inspection by the carrier’s agent should be made in writing. Unitary Products Group...
  • Page 5: Physical Data

    IR ON NDOOR EATING YCLE Rated in accordance with ARI Standard 110, utilization range “A”. Below 0ºF the control circuit will lock out the compressor and allow the electric heat accessory to cycle at its stand by capacity. Unitary Products Group...
  • Page 6: Installation

    HANGER RODS (FIELD SUPPLIED) SUSPENSION CHANNEL ELECTRIC HEATER ACCESSORY (40 Lb.) 55" 58-11/16" 5" BLOWER SECTION COIL 1-1/2 SECTION SUPPLY AIR PLENUM ACCESSORY (100 Lb.) FIGURE 1: UNIT SUSPENSION MOUNTING FA120 (HORIZONTAL APPLICATIONS) Unitary Products Group...
  • Page 7: Clearances

    4. Attach the blower section to the coil section with the machine bolts removed in Step 2. The FA120 unit is shipped for vertical installation with a vertical air discharge as shown in Figure 2, but may be 5. Before replacing the panel, see Duct Connection converted to other arrangements per the following and Drain Connection.
  • Page 8: Duct Connections

    It is provided with a squeeze connector for securing the wiring harness, and its location corresponds to the loca- tion of the 1-23/32 inch knockout in the top panel of the basic unit. FIGURE 4: ELECTRIC HEAT ACCESSORY Unitary Products Group...
  • Page 9: Return Air Grille Fa120

    035-18555-001-B-0203 TABLE 4: ELECTRIC HEATER DIMENSIONS FA120 Heater Dimensions (inches) EATER ODEL 2HS04501025, 46 2HS04501625, 46 28-1/2 25-1/4 14-1/4 5-1/2 1-1/2 1-1/2 22-1/4 19-1/4 2HS04502625, 46 2HS04503625, 48 60-3/4 1 9 - 7 / 8 1 9 - 1 / 2...
  • Page 10: Drain Connection

    The liquid and suction connections must be piped outside the is used, care should be taken to avoid sharp bends which unit. Refer to the unit drawing for locations and the dimen- may cause a restriction. sions of these connections. Unitary Products Group...
  • Page 11: Expansion Valve Bulb

    (along unit. with the grommets) onto the refrigerant lines. After the brazed joints have cooled, slide the panel back into place and TABLE 5: ELECTRICAL DATA - FA120 secure it to the unit frame. Max. Fuse Blower Power Supply...
  • Page 12: Power And Control Wiring

    #18 Solid necting motor leads for a 208 or 230 volt power supply. #18 Stranded #16 Stranded #14 Stranded #12 Stranded 035-16602-001 FIGURE 10: TYPICAL FIELD WIRING Unitary Products Group...
  • Page 13: Supply Air Blower Adjustment

    TURNS activated while the test is being run. OPEN 550-730 RPM Knowing the pressure drop across a dry coil the actual CFM through the unit can be determined from the curve in Figure 13. Unitary Products Group...
  • Page 14: Hole Locations For Pressure Drop Readings

    If the CFM is above or below the specified value, the supply air motor pulley may have to be re-adjusted. After one hour FA120 0.25 0.15 0.05 1500 2500 3500 4500 5500 6500 SCFM FIGURE 13: CFM VS PRESSURE DROP Unitary Products Group...
  • Page 15: Blower Performance Curve

    035-18555-001-B-0203 TABLE 8: SUPPLY AIR BLOWER PERFORMANCE FA120 10 TON BLOWER PERFORMANCE Watts Watts Watts Watts Watts Watts 5775 2168 5402 1851 4990 1516 4571 1281 4250 1097 5521 2283 5409 1954 4810 1633 4326 1307 3785 1069 3484 4864...
  • Page 16: Accessory Static Resistance (Iwg)

    FA120 550-730 2.8-3.8 56.3 These factory-mounted motore are wired for a 460V power supply. Refer to the wiring diagram inside the motor terminal box when reconnecting the motor leads to a 208 or 230 volt power supply. Unitary Products Group...
  • Page 17: Unit Dimensions Fa120

    . FIGURE 15: UNIT DIMENSIONS FA120...
  • Page 18: Maintenance

    The filters must be replaced as often as necessary to assure Maintain belt tension to extend belt life. Replace the signs if good air flow and filtering action. Clean filters will prevent failure begins to appear. any loss in capacity and efficiency. Unitary Products Group...
  • Page 19 035-18555-001-B-0203 Unitary Products Group...
  • Page 20 Subject to change without notice. Printed in U.S.A. 035-18555-001-B-0203 Copyright © by Unitary Products Group 2003. All rights reserved. Supersedes: 035-18555-001-A-0602 Unitary 5005 Norman Products York Group Drive 73069...

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