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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.
FJ4: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
9
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.
A221106
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.
Condensate Drains
To connect drains, the cap openings must be removed. Use a knife to
start the opening near the tab and using pliers, pull the tab to remove the
disk. Clean the edge of the opening if necessary and install the
condensate line. Finally caulk around the lines where they exit the fitting
to retain the low leak rating of the unit.
Units are equipped with primary and secondary ¾" FPT drain
connections. For proper condensate line installations see
Fig. 2 thru
Fig. 6. To prevent property damage and achieve optimum drainage
performance, BOTH primary and secondary drain lines should be
installed and include properly-sized condensate traps (Fig. 17 and
Fig. 19). Factory-approved condensate traps are available. It is
recommended that PVC fittings be used on the plastic condensate pan.
Finger-tighten plus 1-1/2 turns. Do not over-tighten. Use pipe dope.
NOTE: Do not use CPVC in field drain lines due to potential reaction
with POE oil.
NOTE: When connecting condensate drain lines, avoid blocking filter
access panel, thus preventing filter removal. After connection, prime
both primary and secondary condensate traps.
A03002
Fig. 17 – Recommended Condensate Trap
A03013
Fig. 18 – Insufficient Condensate Trap
NOTE: If unit is located in or above a living space where damage may
result from condensate overflow, a field-supplied, external condensate
pan should be installed underneath the entire unit, and a secondary
condensate line (with appropriate trap) should be run from the unit into
the pan. Any condensate in this external condensate pan should be
drained to a noticeable place. As an alternative to using an external
condensate pan, some localities may allow the use of a separate ¾"
(19 mm) condensate line (with appropriate trap) to a place where the
condensate will be noticeable. The owner of the structure must be
informed that when condensate flows from the secondary drain or
external condensate pan, the unit requires servicing or water damage will
occur.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this Caution may result in unit damage.
Failure to place insulation between copper tubes and aluminum parts
will lead to galvanic corrosion, which will result in a refrigerant leak in
the future.
1
2
3
4
CAUTION
!
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product or property damage.
Use only full size P-traps in the condensate line (
Fig. 17). Shallow
running traps are inadequate and DO NOT allow proper condensate
drainage (
Fig. 18).
CAUTION
!
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this warning caution may result in product or property
damage.
The conversion of the fan coil to downflow requires special procedures
for the condensate drains on both A-coil and Slope-coil units. The
vertical drains have an overflow hole between the primary and
secondary drain holes. This hole is plugged for all applications except
downflow, and must be used for downflow. During conversion process,
remove plastic cap covering vertical drains only and discard. Remove
plug from overflow hole and discard. At completion of downflow
installation, caulk around vertical pan fitting to door joint to retain low
air leak performance of the unit.
2” MIN
(51 mm)
UNIT
2” MIN
(51 mm)
DO NOT USE SHALLOW RUNNING TRAPS!