Phau Ntawv Qhia
Table Of Contents
- Installation Instructions
- Safety Considerations
- Introduction
- Heater Packages
- Installation
- Check Equipment
- Mount Unit
- Nuisance sweating may occur if the unit is installed in a high humidity environment with low airflow.
- Downflow Installation
- Horizontal Installation
- A07565
- Fig. 2 – Slope Coil Unit in Upflow Application
- Horizontal Right Conversion of Units with Slope Coils
- 1. Remove blower and coil access panels and fitting panel (Fig. 6).
- 2. Remove coil mounting screw securing coil assembly to right side casing flange.
- 3. Remove coil assembly.
- 4. Lay fan coil on its right side and reinstall coil assembly with condensate pan down (Fig. 5).
- 5. Attach coil to casing flange using previously removed coil mounting screw.
- 6. Make sure pan cap in fitting door is properly seated on fitting door to retain low air leak rating of the unit.
- 7. Add gaskets from kit.
- 8. Align holes with tubing connections and condensate pan connections. Reinstall access panels and fitting panel.
- 9. Make sure liquid and suction tube grommets are in place to prevent air leaks and cabinet sweating. Install grommets after brazing.
- Horizontal Right Conversion of Units with A-Coils
- 1. Remove blower and coil access panels (Fig. 6).
- 2. Remove metal clip securing fitting panel to condensate pan. Remove fitting panel.
- 3. Remove 2 snap-in clips securing A-coil in unit.
- 4. Slide coil and pan assembly out of unit.
- 5. Remove horizontal drain pan support bracket from coil support rail on left side of unit and reinstall on coil support rail on right side of unit (Fig. 8).
- 6. Convert air seal assembly for horizontal right.
- a. Remove air seal assembly from coil by removing 4 screws (Fig. 6).
- b. Remove air splitter (B) from coil seal assembly by removing 3 screws (Fig. 7 inset).
- c. Remove filler plate (A) and install air splitter (B) in place of filler plate.
- d. Install filler plate (A) as shown in horizontal right application.
- e. Remove condensate troughs (C) and install on opposite tube sheets.
- f. Install hose onto plastic spout.
- 7. Install horizontal pan on right side of coil assembly.
- 8. Slide coil assembly into casing. Be sure coil bracket on each corner of vertical pan engages coil support rails.
- 9. Reinstall 2 snap-in clips to correctly position and secure coil assembly in unit. Be sure clip with large offsets is used on right side of unit to secure horizontal pan.
- 10. Remove two oval fitting caps from left side of the coil, access panel, and fitting panel.
- 11. Remove insulation knockouts on right side of coil access panel.
- 12. Remove 2 oval coil access panel plugs and reinstall into holes on left side of coil access panel and fitting panel.
- 13. Install condensate pan fitting caps (from Step 10) in right side of coil door making sure that cap snaps and seats cleanly on back side of the coil door. Make sure no insulation interferes with seating of cap.
- 14. Reinstall access and fitting panels, aligning holes with tubing connections and condensate pan connections. Be sure to reinstall metal clip between fitting panel and vertical condensate pan.
- 15. Make sure liquid and suction tube grommets are in place to prevent air leaks and cabinet sweating.
- A07566
- Fig. 3 – Slope Coil in Horizontal Left Application (Factory Configuration)
- Fig. 4 – A-Coil in Horizontal Left Application (Factory Configuration)
- Fig. 5 – Conversion for Horizontal Right Applications - Slope Coil
- Fig. 6 – Conversion for Horizontal Right Applications - A-Coil
- Manufactured and Mobile Home Housing Applications
- 1. Secure the fan coil to the structure using field-supplied hardware.
- 2. Allow a minimum of 24" (610 mm) clearance from access panels.
- 3. Recommended method of securing for typical applications:
- a. If fan coil is away from wall, attach pipe strap to top of fan coil using no. 10 self-tapping screws. Angle strap down and away from back of fan coil, remove all slack, and fasten to wall stud of structure using 5/16" lag screws. Typical both side...
- b. If fan coil is against wall, secure fan coil to wall stud using 1/8" (3 mm) thick right-angle brackets. Attach brackets to fan coil using no. 10 self-tapping screws and to wall stud using 5/16" lag screws (Fig. 9).
- Fig. 7 – Removal of Brackets on Modular Unit
- Fig. 8 – Drain Pan Support Bracket
- Fig. 9 – Mobile Home or Manufactured Housing Applications
- Air Ducts
- Electrical Connections
- Line Voltage Connections
- 24V Control System
- Connection To Unit
- Fig. 10 – Wiring Layout Air Conditioning Unit (Cooling Only)
- Fig. 11 – Wiring Layout Air Conditioning Unit (Cooling and 1-Stage Heat)
- Fig. 12 – Wiring Layout Heat Pump Unit (Cooling and 2-Stage Heat with No Outdoor Thermostat)
- Fig. 13 – Wiring Layout Heat Pump Unit (Cooling and 2-Stage Heat for Manufactured Housing)
- Transformer Information
- Heater Staging
- Refrigerant Tubing Connection and Evacuation
- 1. Cut tubing to correct length.
- 2. Insert tube into sweat connection on unit until it bottoms.
- 3. Braze connection using silver bearing or non-silver bearing brazing materials. Do not use solder (materials which melt below 800° F / 427° C). Consult local code requirements.
- 4. Evacuate coil and tubing system to 500 microns using a deep vacuum method.
- Refrigerant Flow-Control Device
- Disassembly
- 1. Use an adjustable wrench with a backup adjustable wrench to loosen Item # 3 (TXV equalizer line).
- 2. For Item #4 - Cut the wire tie and remove the black insulation. Remove the band from around the TXV bulb.
- 3. Cut the wire tie that holds the TXV equalizer line and bulb from the aluminum vapor header tube.
- 4. Remove 2 screws from the TXV bracket. Remove the TXV from the coil unit.
- Assembly
- 1. Mount the TXV bracket and TXV with the 2 screws removed during disassembly.
- 2. Connect Items #1 and #2 (TXV outlet and inlet respectively) and use an adjustable wrench with a backup wrench to tighten each nut. Tighten to between 10 and 20 ft-lbs.
- 3. Connect Item #3 and use an adjustable wrench with a backup adjustable wrench to tighten the flare nut. Tighten to approximately 12 ft-lbs.
- 4. Item # 4 - Reconnect the TXV bulb with a clamp and reinstall insulation around the TXV bulb and vapor tube.
- Fig. 16 – Mechanical TXV Removal
- 5. Use a wire tie to mount the 1/8" TXV equalizer and bulb tubes to the vapor header tube. Make sure that there is insulation between the aluminum vapor tube and copper tube.
- 6. Leak test the TXV fittings, then evacuate and charge the system to the required subcooling per the outdoor unit rating plate.
- Disassembly
- Condensate Drains
- Accessories
- Sequence of Operation
- Start-up Procedures
- Care and Maintenance
- Fig. 22 – Shipping Screws
- Table 2 – Electric Heater Static Pressure Drop (in. wc)
- Table 3 – Airflow Performance (CFM) Wet
- 1. Airflow based upon dry coil at 230V with factory-approved filter and electric heater (2 element heater sizes 018 through 036, 3 element heater sizes 042 through 060).
- 2. To avoid potential for condensate blowing out of drain pan prior to making drain trap: Return static pressure must be less than 0.40 in. wc. Horizontal applications of 042 - 060 sizes must have supply static greater than 0.20 in. wc.
- 1. Airflow based upon dry coil at 230V with factory-approved filter and electric heater (2 element heater sizes 018 through 036, 3 element heater sizes 042 through 060).
- 2. To avoid potential for condensate blowing out of drain pan prior to making drain trap: Return static pressure must be less than 0.40 in. wc. Horizontal applications of 042 - 060 sizes must have supply static greater than 0.20 in. wc.
© 2022 Carrier. All rights reserved.
A Carrier Company
Edition Date: 09/22
Catalog No: IM-FJ4D-02
Replaces: IM-FJ4D-01
FJ4: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
13
NOTES:
1.Airflow based upon dry coil at 230V with factory-approved filter and electric heater (2 element heater sizes 018 through 036, 3 element heater sizes 042 through 060).
2. To avoid potential for condensate blowing out of drain pan prior to making drain trap:
Return static pressure must be less than 0.40 in. wc. Horizontal applications of 042 - 060 sizes must have supply static greater than 0.20 in. wc.
Airflow above 400 cfm/ton on 048-060 size could result in condensate blowing off coil or splashing out of drain pan.
Table 4 – Airflow Performance (CFM) Dry
Ton
(Size)
Blower
Speed
External Static (in. wc)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
1-1/2
(018)
Tap 5 762 741 721 698 672 656 635 577 547 509
Tap 4 695 679 655 628 600 580 559 534 505 452
Tap 3 695 679 655 628 600 580 559 534 505 452
Tap 2 634 615 585 547 522 506 475 444 407 371
Tap 1 498 470 434 390 356 300 272 NA NA NA
2
(024)
Tap 5 1046 1013 978 958 925 877 830 752 722 687
Tap 4 992 950 916 869 812 763 705 660 611 585
Tap 3 992 950 916 869 812 763 705 660 611 585
Tap 2 900 862 814 769 709 644 594 548 507 451
Tap 1 762 723 651 599 531 471 428 385 345 319
2-1/2
(030)
Tap 5 1277 1244 1226 1193 1169 1122 1094 1058 1014 969
Tap 4 1179 1142 1114 1070 1039 998 937 915 867 825
Tap 3 1179 1142 1114 1070 1039 998 937 915 867 825
Tap 2 1066 1030 997 960 916 863 795 746 703 674
Tap 1 923 878 832 784 723 658 616 563 NA NA
3
(036)
Tap 5 1489 1463 1428 1388 1345 1305 1262 1213 1160 1093
Tap 4 1357 1337 1310 1283 1249 1212 1165 1114 1064 1014
Tap 3 1357 1337 1310 1283 1249 1212 1165 1114 1064 1014
Tap 2 1211 1190 1162 1132 1100 1066 1016 959 905 838
Tap 1 1059 1038 1004 967 925 887 843 791 747 681
3-1/2
(042)
Tap 5 1647 1620 1583 1548 1505 1464 1424 1379 1319 1250
Tap 4 1569 1539 1506 1476 1442 1404 1370 1336 1299 1219
Tap 3 1569 1539 1506 1476 1442 1404 1370 1336 1299 1219
Tap 2 1393 1355 1329 1288 1248 1223 1180 1138 1091 1037
Tap 1 1265 1234 1195 1154 1111 1062 1022 964 914 865
4
(048)
Tap 5 1956 1917 1887 1855 1831 1798 1763 1743 1707 1683
Tap 4 1773 1743 1704 1667 1634 1612 1571 1536 1500 1464
Tap 3 1773 1743 1704 1667 1634 1612 1571 1536 1500 1464
Tap 2 1566 1524 1483 1451 1414 1376 1340 1303 1266 1217
Tap 1 1413 1373 1328 1283 1246 1204 1168 1120 1075 1012
5
(060)
Tap 5 2148 2123 2084 2048 2002 1974 1939 1891 1893 1812
Tap 4 2148 2123 2084 2048 2002 1974 1939 1891 1893 1812
Tap 3 2148 2123 2084 2048 2002 1974 1939 1891
1893 1812
Tap 2 1955 1913 1868 1833 1796 1757 1711 1654 1632 1570
Tap 1 1646 1590 1527 1496 1442 1373 1315 1294 1221 1164