Carrier FJ5 Fan Coil Units Installation Guide
- July 17, 2024
- Carrier
Table of Contents
FJ5 Fan Coil Units
“`html
Specifications:
-
Product: FJ5 Fan Coil Units for Puron AdvanceTM (R-454B)
Refrigerant -
Sizes: 18 to 60
-
Designed for installation flexibility
-
Compliant with low leak requirements
-
Uses multi-tap ECM motor for efficiency
-
Designed for upflow, downflow, and horizontal orientations
-
Must be used with Puron Advance refrigerant air conditioners
and heat pumps -
Designed for systems of 18,000 through 60,000 BTUh nominal
cooling capacity
Product Usage Instructions:
Safety Considerations:
Improper installation, adjustment, alteration, service,
maintenance, or use can cause dangerous conditions. Always consult
a qualified installer or service agency. Follow all safety codes
and wear appropriate protective gear.
Installation:
-
Check Equipment: Unpack unit and move to final location. Remove
shipping blocks carefully. -
Handle with Care: Be cautious of sharp edges or burrs on sheet
metal parts. Use protective gear when handling parts. -
Electrical Operation: Turn off all power to the unit before
installation or servicing. Make sure all power sources are
disconnected.
Introduction:
The Fan Coils are designed for flexibility in installation and
efficiency. They are compliant with low leak requirements and use a
multi-tap ECM motor for energy efficiency. Ensure installation in a
location lower than 600 meters above sea level.
Note:
These units are specifically designed for use with Puron Advance
refrigerant air conditioners and heat pumps. Factory-authorized
electric heater packages are available as accessories.
FAQ:
Q: Can these units be installed at any altitude?
A: No, these units must be installed in a location lower than
600 meters above sea level.
Q: Are electric heater packages included with the unit?
A: Factory-authorized, field-installed electric heater packages
are available as accessories in sizes 5 through 30kW.
“`
FJ5 Fan Coil Units for Puron AdvanceTM (R-454B) Refrigerant Sizes 18 to 60
Installation Instructions
NOTE: Read these entire instructions before starting the installation.
Table of Contents
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . 1 Safety Considerations . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . 1 Introduction. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Heater
Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . 2
Check Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 2 Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 2 Upflow Installation . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . 2 Downflow Installation . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Horizontal
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. 3 Air Ducts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 6 Ductwork Acoustical Treatment . . . . . . . . .
. . . . . . . . . . . . . . . . . 6 Electrical Connections . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . 6 Line Voltage Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 24V Control
System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Manufactured Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 8 Ground Connections . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 8 Minimum CFM and Motor Speed Selection . . . . . . .
. . . . . . . . . . 8 Table 1 Fan Speed Selection. . . . . . . . . . . . . .
. . . . . . . . . . . . . . 8 Refrigerant Tubing Connection and Evacuation . .
. . . . . . . . . . . . . . 9 Mechanical Line Set Connections . . . . . . . .
. . . . . . . . . . . . . . . . . 9 Refrigerant Flow-Control Device . . . . .
. . . . . . . . . . . . . . . . . . . . . . . 9 Condensate Drains . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Leak
Dissipation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 11 Leak Dissipation System Self-Test . . . . . . . . . . . . . . . . . .
. . . . . 11 Table 2 Dissipation Board Test Button Functions . . . . . . . .
. . 11 Table 3 Required Operational Checks to Ensure Proper Dissipation
System Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 12 Table 4 Required Minimum Dissipation Mode Airflows, based on
Total System Refrigerant Charge Quantity. . . . . . . . . . 12 Troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 Flash Code Chart . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 12 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . 12 Humidifier . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . 12 Sequence of Operation . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Continuous Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 12 Cooling Mode . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 13 Heat Pump Heating with Auxiliary Electric Heat
. . . . . . . . . . . . 13 Electric Heat or Emergency Heat Mode . . . . . . .
. . . . . . . . . . . . 13 Leak Dissipation Mode . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . 13 Start-up Procedures. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 6 Charge
Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Care
and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 14 Table 7 Electric Heater Static Pressure Drop (in. wc) . . . . . .
. 14 Table 8 Airflow Performance (CFM) Wet . . . . . . . . . . . . . . . .
15 Table 9 Airflow Performance (CFM) Dry . . . . . . . . . . . . . . . . 16
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. Consult a qualified
installer, service agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this product. Refer to
the individual instructions packaged with kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing and work
gloves. Have a 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) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical Code CSA
C22.1.
Recognize safety information. This is the safety-alert symbol . When you see
this symbol on the unit and in instruction manuals, be alert to the potential
for personal injury.
Understand the signal words DANGER, WARNING, and CAUTION. These words are used
with the safety-alert symbol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used to identify
unsafe practices which may result in minor personal injury or product and
property damage. NOTE is used to highlight suggestions which will result in
enhanced installation, reliability, or operation.
Go to https://www.corporate.carrier.com/patents/ for listed Carrier patents.
! WARNING
PROPERTY OR PERSONAL INJURY HAZARD Risk of fire. Flammable refrigerant used.
To be repaired only by trained service personnel. Do not puncture refrigerant
tubing. Auxiliary devices which may be ignition sources shall not be installed
in the ductwork, other than auxiliary devices listed for use with the specific
appliance. See instructions. Dispose of refrigerant properly in accordance
with federal or local regulations. Failure to follow proper R-454B mitigation
system installation instructions can result in property damage, personal
injury, or death. If any fault codes are listed, please troubleshoot to
prevent system malfunction.
! WARNING
PERSONAL INJURY / PROPERTY DAMAGE HAZARD Failure to follow this warning could
result in property damage, personal injury, or death. For continued
performance, reliability, and safety, the only approved accessories and
replacement parts are those specified by the equipment manufacturer. The use
of non-manufacturer approved parts and accessories could invalidate the
equipment limited warranty and result in fire risk, equipment malfunction, and
failure. Please review manufacturer’s instructions and replacement part
catalogs available from your equipment supplier.
FJ5: Installation Instructions
! WARNING
ELECTRICAL OPERATION HAZARD Failure to maintain proper clearances could result
in personal injury or death. Before installing or servicing unit, always turn
off all power to unit. There may be more than 1 disconnect switch. Turn off
accessory heater power if applicable.
Installation
Check Equipment
Unpack unit and move to final location. Remove carton taking care not to
damage unit.
NOTE: Shipping block(s) that support the blower housing during transit will
need to be removed (Fig. 1).
! CAUTION
CUT HAZARD Failure to follow this caution may result in personal injury. Sheet
metal parts may have sharp edges or burrs. Use care and wear appropriate
protective clothing, safety glasses and gloves when handling parts.
! CAUTION
HOT TUBE WARNING
Failure to follow this caution could result in personal injury and/or property
damage.
Refrigerant lines can reach or exceed 130 °F (54 °C). Avoid contact with the
vapor header or vapor line, especially in Heating Mode. Do not service A2L
refrigerant fan coils while these components are hot to avoid risk of ignition
source.
Introduction
These Fan Coils are designed for installation flexibility. The units leave the
factory compliant with low leak requirements of less than 2% cabinet leakage
rate at 1.0 inches W.C. and 1.4% cabinet leakage rate at 0.5 inches W.C. when
tested in accordance with ASHRAE 193 standard. All these fan coils use a
multi-tap ECM motor for efficiency. The units have be designed for upflow,
downflow (kit required), and horizontal orientations, including manufactured
and mobile home applications.
IMPORTANT: These units are designed specifically for Puron Advance refrigerant
and must be used only with Puron Advance refrigerant air conditioners and heat
pumps as shipped.
IMPORTANT: This unit MUST be installed in a location that is LOWER than 600
meters above sea level. These units are available for systems of 18,000
through 60,000 BTUh nominal cooling capacity. Factory- authorized, field –
installed electric heater packages are available in sizes 5 through 30kW. See
Product Data literature for all available accessory kits.
Heater Packages
NOTE: Some heater sizes may require the removal of two screws which connect
the blower housing to the fan deck (removal will not impact performance). See
(Care and Maintenance on p14) and Fig. 25.
This unit may or may not be equipped with an electric heater package. For
units not equipped with factory-installed heat, a factory-approved, field-
installed, UL listed heater package is available from your equipment supplier.
See unit rating plate for a list of factory-approved heaters. Heaters that are
not factory approved could cause damage which would not be covered under the
equipment warranty. If fan coil contains a factory-installed heater package,
minimum circuit ampacity (MCA) and maximum fuse/breaker may be different than
units with a same size field-installed accessory heater. The differences is
not an error and is due to calculation difference per UL guidelines.
Fig. 1 Remove Shipping Blocks
A230488
NOTE: If the door gasket is damaged or missing, the unit may not meet the ASHRAE 193 standard for cabinet air leakage. See the Product Data for this model or contact your supplier to order the gasket kit.
Inspect equipment for damage prior to installation. File claim with shipping company if shipment is damaged or incomplete. Locate unit rating plate which contains proper installation information. Check rating plate to be sure unit matches job specifications.
Mount Unit
Unit can stand or lie on floor, or hang from ceiling or wall. Allow space for wiring, piping, and servicing unit. The indoor equipment and pipes shall be securely mounted and guarded such that accidental rupture of equipment cannot occur from such events as moving furniture or reconstruction activities. When a Fresh Air Ventilator (HRV or ERV) is used, the air extraction opening from the room shall be located equal to or below the top of the unit. For floor mounted units, it shall be as low as practicable. The air extraction openings shall be located in a sufficient distance, BUT NOT LESS THAN 3ft 4in (3 m), from the air intake openings to prevent re-circulation to the space. When a Fresh Air Ventilator (HRV or ERV) is used, the lower edge of the air extraction opening where air is exhausted from the room SHALL NOT be more than 4in (100 mm) above the floor.
IMPORTANT: When unit is installed over a finished ceiling and/or living area, building codes may require a field-supplied secondary condensate pan to be installed under the entire unit. Some localities may allow as an alternative, the running of a separate, secondary condensate line. Consult local codes for additional restrictions or precautions.
Nuisance sweating may occur if the unit is installed in a high humidity environment with low airflow.
Upflow Installation
If return air is to be ducted through a floor, set unit on floor over opening and use 1/8″ to ¼” (3 to 6 mm) thick fireproof resilient gasket between duct, unit, and floor. Side return is a field option on slope coil models. Cut opening per dimensions (Fig. 3). A field-supplied bottom closure is required.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 2
FJ5: Installation Instructions
Modular Units Modular units (3½, 4, and 5 ton) can be disassembled and
components moved separately to the installation area for reassembly. This
process accommodates small scuttle holes and limiting entrances to
installation sites (Fig. 2).
To disassemble the unit, disconnect the 4-pin sensor wire harness at the
dissipation board and undo the wire routing in the cabinet. Remove the rear
corner brackets by removing 2 screws which secure the brackets. Remove either
2 screws in each front corner of the coil box, or 2 screws in the blower box.
Do not remove all 4 screws in each corner. Sections may now be separated by
lifting the top section from the lower section. To reassemble, reverse above
procedure. Be certain to reinstall all fasteners when reassembling.
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 sides of
fan coil. 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. 2).
! CAUTION
PRODUCT 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.
Horizontal Installation
Units must not be installed with access panels facing up or down. All other
units are factory built for horizontal left installation (Fig. 4 and Fig. 5).
When suspending unit from ceiling, dimples in casing indicate suitable
location of screws for mounting metal support straps (Fig. 4). For horizontal
applications having high return static and humid return air, the Water
Management Kit may need to be used to assist in water management. See the
Product Data or contact your supplier for the kit number. NOTE: Modular units
can be disassembled and components moved separately to installation area for
reassembly. This process accommodates small scuttle holes and limiting
entrances to installation sites (Fig. 9).
! CAUTION
PROPERTY DAMAGE HAZARD Failure to follow this caution may result in product or
property damage. For optimum condensate drainage performance in horizontal
installations, unit should be leveled along its length and width.
Fig. 2 Removal of Brackets on Modular Unit
A95293
Downflow Installation
In this application, field conversion of the evaporator is required using accessory downflow kit along with an accessory base kit. Use fireproof resilient gasket, 1/8″ to ¼” (3 to 6 mm) thick, between duct, unit, and floor.
NOTE: To convert units for downflow applications, refer to Installation Instructions supplied with kit for proper installation. See the Product Data or contact your supplier for the kit number. Use fireproof resilient gasket, 1/8″ to ¼” (3 to 6 mm) thick, between duct, unit, and floor.
NOTE: A gasket kit is also required for all downflow applications to maintain low air leak/low sweat performance. See the Product Data or contact your supplier for the kit number.
Fig. 3 Slope Coil Unit in Upflow Application
A07565
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 3
FJ5: Installation Instructions
A-COIL HORIZONTAL LEFT
LOW VOLT ENTRY OPTIONS
FIELD SUPPLIED HANGING STRAPS
UNIT
SECONDARY DRAIN
PRIMARY DRAIN
018-048 21″ (533 mm) 060-060 24″ (610 mm) FRONT SERVICE CLEARANCE (FULL FACE OF UNIT)
1.75″ (44 mm) FILTER ACCESS CLEARANCE
POWER ENTRY OPTIONS
SECONDARY DRAIN
PRIMARY DRAIN
Fig. 4 Slope Coil in Horizontal Left Application (Factory Configuration)
A07566
Horizontal Right Conversion of Units with Slope Coils
NOTE: A gasket kit is required for horizontal slope coil conversion to
maintain low air leak/low sweat performance. See the Product Data or contact
your supplier for the kit number.
4. Remove metal clip securing fitting panel to condensate pan. Remove fitting
panel.
5. Remove 2 snap-in clips securing A-coil in unit. 6. Slide coil and pan
assembly out of unit.
1. Remove blower and coil access panels and fitting panel (Fig. 7).
2. Disconnect sensor on drain pan and cut wire tie securing sensor harness to
the coil.
7. 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).
3. Undo sensor wire routing and place entire harness in the control box.
4. Remove coil mounting screw securing coil assembly to right side casing
flange.
5. Remove coil assembly.
6. Lay fan coil on its right side and reinstall coil assembly with condensate
pan down (Fig. 6).
7. Attach coil to casing flange using previously removed coil mounting screw.
8. Reconnect sensor wire harness by following routing shown (Fig. 6).
8. Convert air seal assembly for horizontal right. a. Remove air seal assembly from coil by removing 4 screws (Fig. 7). 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.
IMPORTANT: Sensor must be installed with the connector facing down or facing
horizontally. Sensor should never be positioned with connector facing upward.
Incorrect sensor position could result in premature failure.
9. Make sure pan cap in fitting door is properly seated on fitting door to
retain low air leak rating of the unit.
10. Add gaskets from kit.
11. Align holes with tubing connections and condensate pan connections.
Reinstall access panels and fitting panel.
12. 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. 7).
2. Disconnect and remove sensor on delta plate and install on horizontal
drain pan clip (Fig. 19).
IMPORTANT: Sensor must be installed with the connector facing down or facing
horizontally. Sensor should never be positioned with connector facing upward.
Incorrect sensor position could result in premature failure.
3. Undo sensor wire harness routing and place entire harness in the control
box.
9. Install horizontal pan on right side of coil assembly.
10. Slide coil assembly into casing. Be sure coil bracket on each corner of
vertical pan engages coil support rails.
11. 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.
12. Remove two oval fitting caps from left side of the coil, access panel,
and fitting panel.
13. Remove insulation knockouts on right side of coil access panel.
14. Remove 2 oval coil access panel plugs and reinstall into holes on left
side of coil access panel and fitting panel.
15. Install condensate pan fitting caps (from Step 12) 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.
16. 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.
17. Make sure liquid and suction tube grommets are in place to prevent air
leaks and cabinet sweating.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 4
FJ5: Installation Instructions
Fig. 5 A-Coil in Horizontal Left Application (Factory Configuration)
A230497
Fig. 6 Conversion for Horizontal Right Applications – Slope Coil
A230499
Fig. 7 Conversion for Horizontal Right Applications – A-Coil
Manufacturer reserves the right to change, at any time, specifications and
designs without notice and without obligations. 5
A230498
FJ5: Installation Instructions
Fig. 8 Drain Pan Support Bracket
A07571
A07567
Fig. 9 Mobile Home or Manufactured Housing Applications
Air Ducts
Connect supply-air duct over the outside of ¾” (19 mm) flanges provided on
supply-air opening. Secure duct to flange, using proper fasteners for type of
duct used, and seal duct-to-unit joint. If return-air flanges are required,
install factory-authorized accessory kit.
Use flexible connectors between ductwork and unit to prevent transmission of
vibration. When electric heater is installed, use heat-resistant material for
flexible connector between ductwork and unit at discharge connection. Ductwork
passing through unconditioned space must be insulated and covered with vapor
barrier.
Units equipped with 20-30kW electric heaters require a 1″ (25 mm) clearance to
combustible materials for the first 36″ (914 mm) of supply duct. All 18,000
BTU units equipped with 8 or 10 kW electric heaters require a 1″ (25.4 mm)
clearance to combustible materials for the first 12″ of supply duct.
If the appliance is connected via an air duct system to one or more rooms, the
supply and return air shall be directly ducted to the space. Open areas such
as false ceilings shall not be used as a return air duct. Any auxiliary
devices installed in the ductwork should be approved by the manufacturer or
declared suitable with the R-454B refrigerant.
! WARNING
EXPLOSION AND PERSONAL HEALTH HAZARD Failure to follow this warning could
result in personal injury, death, and/or unit damage. Ensure to keep any
required ventilation openings clear of obstruction. Air ducts connected to the
appliance shall not contain a POTENTIAL IGNITION SOURCE. Auxiliary devices
which may be a POTENTIAL IGNITION SOURCE shall not be installed in the duct
work. Examples of such POTENTIAL IGNITION SOURCES are hot surfaces with a
temperature exceeding 1292°F (700°C) and electric switching devices. Ensure
only manufacturer approved auxiliary devices are installed.
Ductwork Acoustical Treatment
Metal duct systems that do not have a 90° elbow and 10 feet of main duct
before first branch takeoff may require internal acoustical insulation lining.
As an alternative, fibrous ductwork may be used if constructed and installed
in accordance with the latest edition of SMACNA construction standard on
fibrous glass ducts. Both acoustical lining and fibrous ductwork shall comply
with National Fire Protection Association as tested by UL Standard 181 for
Class 1 air ducts.
Electrical Connections
Units from the factory protect the low voltage circuit with a 3A automotive
type fuse in-line on the wire harness. Motor speeds and time delay function
are built into the motor. See (Minimum CFM and Motor Speed Selection on p8)
for clarification. When a factory-approved accessory control package has been
installed, check all factory wiring per unit wiring diagram and inspect
factory wiring connections to be sure none were loosened during transit or
installation. If a different control package is required, see unit rating
plate. Before proceeding with electrical connections, make certain that supply
voltage, frequency, phase, and ampacity are as specified on the unit rating
plate. See unit wiring label for proper field high- and low-voltage wiring.
Make all electrical connections in accordance with the NEC and any local codes
or ordinances that may apply. Use copper wire only. The unit must have a
separate branch electric circuit with a field-supplied disconnect switch
located within sight from, and readily accessible from, the unit. On units
with a factory-installed disconnect with pull-out removed, service and
maintenance can be safely performed on only the load side of the control
package.
! WARNING
PERSONAL OR EQUIPMENT DAMAGE HAZARD. Failure to follow this warning could
result in personal injury, death, and/or unit damage. Provide training to
installation personnel to follow national and local electrical codes.
! WARNING
ELECTRICAL SHOCK OR UNIT DAMAGE HAZARD Failure to follow this warning could
result in personal injury, death, and/or unit damage. If a disconnect switch
is to be mounted on unit, select a location where drill and fasteners will not
contact electrical or refrigeration components.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 6
FJ5: Installation Instructions
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in
personal injury or death. Field wires on the line side of the disconnect found
in the fan coil unit remain live, even when the pull-out is removed. Service
and maintenance to incoming wiring cannot be performed until the main
disconnect switch (remote to the unit) is turned off.
Line Voltage Connections
If unit contains an accessory electric heater, remove and discard power plug
from fan coil and connect male plug from heater to female plug from unit
wiring harness. (See Electric Heater Installation Instructions.) For units
without electric heat: 1. Connect 208/230V power leads from field disconnect
to yellow and
black stripped leads. 2. Connect ground wire to unit ground lug. NOTE: Units
installed without electric heat should have a field-supplied sheet metal
block-off plate covering the heater opening. This will reduce air leakage and
formation of exterior condensation.
24V Control System Connection To Unit
Wire low voltage in accordance with wiring label on the blower (Fig. 10 thru
Fig. 13). Use #18 AWG color-coded, insulated (35° C minimum) wire to make the
low-voltage connections between the thermostat, the unit, and the outdoor
equipment. If the thermostat is located more than 100′ (30 m) from the unit
(as measured along the low-voltage wire), use #16 AWG color-coded, insulated
(35° C minimum) wire. All wiring must be NEC Class 1 and must be separated
from incoming power leads. Refer to outdoor unit wiring instructions for any
additional wiring procedure recommendations.
RED
R
R
RED
(Pin 1) RED RED
R
G-OUT
(Pin 2)
GRN/ VIO
G
G
GRN
G-IN
(Pin 6)
WHT
W2
W-OUT
WHT/ VIO
(Pin 7)
BLU
W3
W
WHT
W-IN
(Pin 3)
VIO
E
24V
Common
C
Common
BLK
(Pin 8)
BRN BRN
C
Y
YEL
Y-IN
(Pin 5)
BRN
C
Y-OUT
(Pin 4)
YEL/VIO
LEGEND: Dashed lines represent field wiring.
Solid lines represent factory installed wiring.
Fig. 10 Wiring Layout Air Conditioning Unit (Cooling Only)
Y A230482
RED
R
R
RED
(Pin 1)
RED
RED
R
G-OUT
(Pin 2)
GRN/
VIO
G
24V
G
GRN
G-IN
(Pin 6)
WHT
W2
WHT/
W-OUT
VIO
(Pin 7)
BLU
W3
W
WHT
W-IN
(Pin 3)
VIO
E
Common
C
Common
BLK
(Pin 8)
BRN BRN
C
Y
YEL
Y-IN
(Pin 5)
BRN
C
Y-OUT
(Pin 4)
YEL/VIO
LEGEND: Dashed lines represent field wiring.
Solid lines represent factory installed wiring.
Fig. 11 Wiring Layout Air Conditioning Unit (Cooling and 1-Stage Heat)
Y A230483
RED
R
R
RED
(Pin 1)
RED RED
R
G-OUT
R
(Pin 2)
GRN/
VIO
G
G
GRN
G-IN
(Pin 6)
WHT
W2
24V
WHT/
W-OUT VIO
(Pin 7)
BLU
W3
Common
W
WHT
W-IN
(Pin 3)
VIO
E
C
Common
BLK
(Pin 8)
W2
BRN
BRN
C
BRN
Y
YEL
Y-IN
(Pin 5)
C
Y-OUT
YEL/VIO
(Pin 4)
Y
O
O
LEGEND: Dashed lines represent field wiring.
Solid lines represent factory installed wiring.
Fig. 12 Wiring Layout Heat Pump Unit
A230484
(Cooling and 2-Stage Heat with No Outdoor Thermostat)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 7
FJ5: Installation Instructions
RED
R
R
RED
(Pin 1)
RED RED
R
G-OUT
R
(Pin 2)
GRN/
VIO
G
G
GRN
G-IN
(Pin 6)
WHT
W2
WHT/
24V
W-OUT VIO
(Pin 7)
BLU
W3
Y
YEL
Y-IN
(Pin 5)
Common
VIO
E
C
Common
BLK
(Pin 8)
BRN
BRN
BRN
C
C
Y-OUT
YEL/VIO
(Pin 4)
Y
W
WHT
W-IN
(Pin 3)
W2
Ground Connections
NOTE: Use UL listed conduit and conduit connectors for connecting supply
wire(s) to unit to obtain proper grounding. Grounding may also be accomplished
by using grounding lugs provided in control box.
! WARNING
ELECTRICAL SHOCK HAZARD Failure to establish uninterrupted or unbroken ground
could result in personal injury and/or death. According to NEC, NFPA 70, and
local codes, the cabinet must have an uninterrupted or unbroken ground to
minimize personal injury if an electrical fault should occur. The ground may
consist of electrical wire or metal conduit when installed in accordance with
existing electrical codes. If conduit connection uses reducing washers, a
separate ground wire must be used.
Minimum CFM and Motor Speed Selection
The fan speed selection is done at the motor connector. Units with or without
electric heaters require a minimum CFM. Refer to the unit wiring label to
ensure that the fan speed selected is not lower than the minimum fan speed
indicated.
ODTS
O
O
LEGEND:
Dashed lines represent field wiring.
Solid lines represent factory installed wiring.
Fig. 13 Wiring Layout Heat Pump Unit
A230485
(Cooling and 2-Stage Heat for Manufactured Housing)
Transformer Information
The transformer is factory wired for 230V operation. For 208V applications, disconnect the black wire from the 230V terminal on transformer and connect it to the 208V terminal (Fig. 14).
Fig. 14 Transformer Connections
A05182A
Heater Staging
If electric heat staging is required, a multi-stage heating room thermostat is required. Consult your equipment supplier for a suitable thermostat.
Manufactured Housing
In manufactured housing applications, the Code of Federal Regulations, Title 24, Chapter XX, Part 3280.714 requires that supplemental electric heat be locked out at outdoor temperatures above 40° F (4° C), except for a heat pump defrost cycle. See Fig. 13 for typical low voltage wiring with outdoor thermostat.
Tap 1 Tap 2 Tap 3 Tap 4 Tap 5
Fig. 15 Motor Speed Selection
A11048
Table 1 Fan Speed Selection
Low
90 sec off delay
Medium High
90 sec off delay 90 sec off delay
Electric heat
0 sec off delay
Max
0 sec off delay
electric heat airflow is same CFM as Tap 3, except 0 sec off delay high static applications, see airflow tables for max airflow
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 8
FJ5: Installation Instructions
To change motor speeds disconnect the BLUE fan lead from motor connector
terminal #2 (factory default position) and move to desired speed-tap; 1, 2, 3,
or 5.
Speed-taps 1, 2, and 3 have a 90 second blower off time delay pre-programmed
into the motor. Speed-tap 4 is used for electric heat only (with 0 second
blower time delay) and the WHITE wire should remain on tap 4. Speed-tap 5 is
used for high static applications, but has a 0 second blower time delay pre-
programmed into the motor. See Airflow Performance tables for actual CFM. Se
Fig. 15 for motor speed selection location.
NOTE: In low static applications, lower motor speed tap should be used to
reduce possibility of water being blown off coil.
Refrigerant Tubing Connection and Evacuation
Use accessory tubing package or field-supplied tubing of refrigerant grade.
Suction tube must be insulated. Do not use damaged, dirty, or contaminated
tubing because it may plug refrigerant flow-control device. ALWAYS evacuate
the coil and field-supplied tubing to 500 microns before opening outdoor unit
service valves.
! CAUTION
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product or property damage.
A brazing shield MUST be used when tubing sets are being brazed to the unit
connections to prevent damage to the unit surface and condensate pan fitting
caps.
Units have sweat suction and liquid tube connections. Make suction tube
connection first.
IMPORTANT: Federal regulations require that you do not vent refrigerant to the
atmosphere. Recover during system repair or final unit disposal.
Run refrigerant tubes as directly as possible by avoiding unnecessary turns
and bends.
Make provision for expansion and contraction of long piping runs. Protect
piping and fittings as much as possible against adverse
environmental effects; for example, the danger of water collecting and
freezing in relief pipes or the accumulation of dirt and debris. Install
piping to reduce the likelihood of hydraulic shock damaging the system.
Always use certified steel piping and components to protect against corrosion.
Protect flexible pipe elements against mechanical damage and excessive
stress by torsion or other forces. Check flexible pipes for mechanical damage
annually.
1. Cut tubing to correct length.
2. Insert tube into sweat connection on unit until it bottoms.
3. All fittings need to withstand 700 PSIG (Mechanical Fittings or Brazing).
When brazing, use silver bearing or non-silver bearing brazing material. Do
not use solder (materials which melt below 800° F / 427° C). Consult local
code requirements.
4. Perform a pressure check of the unit with a nitrogen charge of about
200psi. The Nitrogen holding charge must not decrease in pressure for 1 hour.
5. Perform leak check on the unit. Vacuum unit to 500 microns. When isolating
the unit from the pump, the pressure shall not rise above 1500 microns in 10
minutes.
Mechanical Line Set Connections
If using mechanical or crimp-type line set connections, follow crimp tool
manufacturer’s instructions. NOTE: Should the use of mechanical fittings cause
failure of the fittings or failure of the equipment, such would not be covered
under the standard warranty.
! CAUTION
PRODUCT DAMAGE HAZARD Failure to follow this caution may result in product or
property damage. Wrap a wet cloth around rear of fitting to prevent damage to
TXV and factory-made joints.
Refrigerant Flow-Control Device
The 18-60 size units come equipped with an R-454B refrigerant mechanical TXV.
When tightening nuts on a TXV, do not exceed 20 ft-lbs. Always use outdoor
units designed to match indoor fan coil applications.
! CAUTION
PRODUCT OPERATION HAZARD Failure to follow this caution may result in improper
product operation. If using a TXV in conjunction with a single-phase
reciprocating compressor, a compressor start capacitor and relay are required.
Consult outdoor unit pre-sale literature for start assist kit part number.
Disassembly
! WARNING
PERSONAL INJURY HAZARD Failure to follow this warning could result in personal
injury. Remove refrigerant charge from system and ensure there is no pressure
before servicing the TXV.
NOTE: For Item #1 (Fig. 16): Use an adjustable wrench with a backup adjustable
wrench to loosen the brass nut (TXV outlet). Then use both wrenches to loosen
Item # 2 (TXV inlet). 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.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 9
FJ5: Installation Instructions
! 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.
Fig. 16 Mechanical TXV Removal
A230489
! 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.
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. 3 thru Fig. 7.
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. 22). 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.
! 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).
Fig. 17 Recommended Condensate Trap
A03002
Fig. 18 Insufficient Condensate Trap
A03013
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.
Install traps in the condensate lines as close to the coil as possible. (Fig. 22). Make sure that the outlet of each trap is below its connection to the condensate pan to prevent condensate from overflowing the drain pan. Prime all traps, test for leaks, and insulate traps if located above a living area. Condensate drain lines should be pitched downward at a minimum slope of 1″ (25 mm) for every 10′ (3 m) of length. Consult local codes for additional restrictions or precautions.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 10
FJ5: Installation Instructions
Leak Dissipation System
! WARNING
PERSONAL INJURY OR PROPERTY DAMAGE HAZARD Failure to follow proper R-454B
mitigation system installation instructions can result in property damage,
personal injury, or death. If any fault codes are listed, please troubleshoot
to prevent system malfunction.
The 18-60 size units come equipped with a factory wired R-454B leak detection
and dissipation system to ensure safe operation during a leak. The system
consists of a bracket, a PCB, a A2L Detection Sensor, and a drain pan clip.
Failure to install this system will result in potentially hazardous conditions
and improper equipment operation, and void all system warranties and
liabilities. All units are shipped with the A2L Detection Sensor located in
the upflow position. For sizes 18-24, the sensor will always be installed on
the drain pan clip.
A230490
Fig. 19 Dissipation Sensor Mounted on Drain Clip For sizes 30-60, the sensor
comes factory installed on the delta plate (Fig. 20, Fig. 21). For horizontal
right and left, the sensor will need to be moved to the drain pan clip (Fig.
19, Fig. 5, Fig. 6, Fig. 7).
! WARNING
PRODUCT OPERATION / INJURY HAZARD Failure to follow this warning could cause
product damage or personal injury. Make sure the sensor is not exposed to
significant amounts of dust/dirt contamination. This could clog the sensor and
prevent proper functioning. For sensor cleaning instructions, refer to service
manual.
IMPORTANT: Sensor must be installed with the connector facing down or facing
horizontally. Sensor should never be positioned with connector facing upward.
Incorrect sensor position could result in premature failure.
A230502
Fig. 21 Slope Coil Vertical Dissipation Sensor Factory Location
The A2L Detection Sensor is attached to a wiring harness that connects the
sensor to the dissipation board. In upflow, the routing of the wire harness is
up the right side of the unit behind the wire retainers for the cabinet
insulation. At each wire retainers, the harness is attached using two wire
ties. When converting unit to horizontal or downflow, follow routing shown in
Fig. 5, Fig. 6, or Fig. 7. When converting the unit to any orientation, ensure
the sensor wiring harness is disconnected and the wire harness has been placed
in the control box before any components are moved.
Refer to Fig. 10 through Fig. 13 for low voltage field connections between the
dissipation board and the thermostat. All control wires are labeled with the
wire function and landing point.
Leak Dissipation System Self-Test
Power on the unit and verify proper functioning of equipment. The yellow LED
on the dissipation board should be steady. If flash codes are present, see
(Troubleshooting on p12).
NOTE: Operation of the Test Mode is only possible if no faults exist on the
dissipation board.
IMPORTANT: Press the Test button for roughly ONE SECOND to enter Test Mode.
Pressing the Test button for a longer periods enables different functions
(Table 2).
Press the Test button on the dissipation system control board to ensure proper
dissipation system operation under each test condition listed below. After
pressing the Test button, system will enter Dissipation Mode for 60 seconds to
help verify correct operation.
Table 2 Dissipation Board Test Button Functions
Hold Button Time (sec) 1 – 4 5 – 29 30+
3 rapid presses
Function Dissipation Mode for 60 seconds
Display flash code history Flash code 6
Clear flash code history
Ensure that the fan coil is able to meet the minimum required dissipation mode airflows. These required minimum airflow rates during Dissipation Mode are listed in Table 4. They are based on the total system refrigerant charge quantity.
A230501
Fig. 20 A-Coil Vertical Dissipation Sensor Factory Location
Manufacturer reserves the right to change, at any time, specifications and
designs without notice and without obligations. 11
FJ5: Installation Instructions
Table 3 Required Operational Checks to Ensure Proper Dissipation System Function
Normal Operation
Test #
T-Stat Call
Compressor Indoor Fan
Electric/Gas Heat
1
None
Off
Off
Off
2
Cool
On
On
Off
3
Heat
Off
On
On
Dissipation Activated
4
None
Off
On
Off
5
Cool
Off
On
Off
6
Heat
Off
On
Off
Table 4 Required Minimum Dissipation Mode Airflows, based on Total System Refrigerant Charge Quantity
Total System Charge (lb)
5 6 7 8 9 10 11 12 13 14 15
Minimum Required Dissipation Airflow
(CFM) 133 160 186 213 239 266 293 319 346 372 399
Total System Charge (lb)
16 17 18 19 20 21 22 23 24 25
Minimum Required Dissipation Airflow
(CFM) 426 452 479 505 532 559 585 612 639 665
Troubleshooting
For all flash codes, first try power cycling the system to remove the code.
No power Verify the wiring to/from pins 1 and 8 on the power harness plug.
Check the 24V system wiring from the transformer.
Flashing 1 Check for refrigerant leaks using an independent R-454B detector.
If no leaks are present, replace the sensor.
Flashing 2 Check both ends of the sensor wire harness to ensure proper
attachment. Power cycle the system to check whether the flash code has been
removed. If the flash code is still present, replace the sensor.
Flashing 3 Check for refrigerant leaks using an independent R-454B detector.
Flashing 4 If the code does not clear after power cycling the system, replace
the dissipation board.
Flashing 5 If the code does not clear after power cycling the system, replace
the sensor.
Flashing 6 Press the test button repeatedly. Power cycle the system. If the
button cannot be reset, replace the dissipation board.
Flashing 7 Verify wiring of all “Y” and “W” wires in the applicable wiring
diagram.
Flashing 8 Verify wiring of all “Y” and “W” wires in the applicable wiring diagram.
Table 5 Flash Code Chart
Yellow LED
Reason
Mode
Solid
Normal Operation
Normal Operation
Flashing 1
Sensor >= 20% LFL
Dissipation
Flashing 2
Sensor Open
Dissipation
Flashing 3 Normal Mitigation after Leak
Dissipation
Flashing 4
No Power to G Output Dissipation with no Blower
Flashing 5 Fault with A2L Digital Sensor
Dissipation
Flashing 6 Test Button Stuck (>30 s)
Dissipation
Flashing 7
Y or W Wiring Inverted
Normal Operation
Flashing 8
Y or W Shorted
Normal Operation
Accessories Humidifier
Connect the humidifier and humidistat to the fan coil unit as shown in Fig. 23
and Fig. 24. The cooling lockout relay is optional.
Fig. 22 Condensate Drain
A03003
Sequence of Operation
Continuous Fan
Thermostat closes the R to G connection. G passes through the dissipation
board and energizes the fan relay on the PCB which completes the circuit to
the indoor blower motor. When G is de-energized, there is a 90-second delay
before the relay opens.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 12
FJ5: Installation Instructions
RED
RED
R
R
RED
(Pin 1)
RED
RED
R
G-OUT
R
(Pin 2)
GRN/
VIO
G
G
GRN
G-IN
(Pin 6)
WHT
WHT/
W2
24V
W-OUT VIO
(Pin 7)
BLU
W3
Common
W
WHT W-IN
(Pin 3)
VIO
E
Common
BLK
C
(Pin 8)
W2
BRN
BRN
C
BRN
Y
YEL Y-IN
(Pin 5)
C
Y-OUT
YEL/VIO
(Pin 4)
Y
O
O
Relay
Fan Humidifier
Humidistat
LEGEND: Dashed lines represent field wiring. Solid lines represent factory installed wiring.
A230486
Fig. 23 Wiring Layout of Humidifier to Heat Pump
Cooling Mode
Thermostat energizes R to G, R to Y, and R to O (heat pump only). G and Y pass
through the dissipation board to their respective outputs. G energizes the fan
relay on the PCB which completes the circuit to the indoor blower motor. When
G is de-energized, there is a 90-second delay before the fan relay opens.
Heat Pump Heating with Auxiliary Electric Heat
Thermostat energizes R to G, R to Y, and R to W connections. G and Y pass
through the dissipation board to their respective outputs. G energizes the fan
relay on the PCB which completes the circuit to the indoor blower motor. W
energizes the electric heat relay(s) which completes the circuit to the heater
element(s). When W is de-energized, the electric heat relay(s) open, turning
off the heater elements. When G is de-energized there is a 90-second delay
before the fan relay opens.
Electric Heat or Emergency Heat Mode
Thermostat closes R to W connection. W passes through the dissipation board
and energizes the electric heat relay(s) which completes the circuit to the
heater element(s). Blower motor is energized through the normally-closed
contacts on the fan relay. When W is de-energized, the electric heat relay(s)
opens.
R
R
RED
(Pin 1) RED RED
R
G-OUT
(Pin 2)
GRN/
VIO
G
G
GRN
G-IN
(Pin 6)
WHT
W2
W-OUT
WHT/ VIO
(Pin 7)
BLU
W3
Y
YEL
Y-IN
(Pin 5)
VIO
E
24V
Common
C
Common
BLK
(Pin 8)
BRN BRN
C
W
WHT W-IN
(Pin 3)
BRN
C
Y-OUT
YEL/VIO
Y
(Pin 4)
Fan Humidifier
LEGEND:
Humidistat
Dashed lines represent field
wiring.
Solid lines represent factory
installed wiring.
A230487
Fig. 24 Wiring Layout of Humidifier to Fan Coil with Electric Heat
Leak Dissipation Mode
Thermostat energizes appropriate signals to the dissipation board based on
operation mode. The dissipation board energizes G output, which energizes the
fan relay on the PCB to complete the circuit to the indoor blower motor. The
dissipation board opens switches for W and Y. This de-energizes signals going
to electric heat and outdoor compressor which opens the electric heat
relay(s).
Start-up Procedures
Refer to outdoor unit Installation Instructions for system start-up
instructions and refrigerant charging method details.
When charging unit, ensure your conditioned space is larger than the minimum
floor area shown in Table 6. For charging quantities outside of the range of
the table, use the following equation to determine your minimum area: A_min =
15 x Total Charge (lbs) – ft2.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 13
FJ5: Installation Instructions
Charge (lb.)
4 5 6 7 8 9 10 11 12 13 14
Table 6 Charge Table
Minimum Floor Area (sq. ft.)
Charge (lb.)
61
15
76
16
91
17
106
18
122
19
137
20
152
21
167
22
182
23
198
24
213
25
Minimum Floor Area (sq. ft.) 228 243 258 274 289 304 319 335 350 365 380
Care and Maintenance
To continue high performance and minimize possible equipment failure, it is
essential that periodic maintenance be performed on this equipment. Consult
your local dealer as to the proper frequency of maintenance contract.
The ability to properly perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these, contact your dealer
for maintenance. The only consumer service recommended or required is filter
replacement or cleaning on a monthly basis.
NOTE: Servicing the blower assembly requires the removal of two screws that
attach the blower housing to the fan deck. It is not necessary to reinstall of
these screws after service.
! CAUTION
PRODUCT DAMAGE HAZARD Failure to follow this caution may result in poor unit
performance and/or product damage. Never operate unit without a filter.
Factory authorized filter kits may be used when locating the filter inside the
unit. For those applications where access to an internal filter is
impractical, a field-supplied filter must be installed in the return air duct
system.
Fig. 25 Shipping Screws
A221041A
Heater Elements
0 1 2 3 4
Table 7 Electric Heater Static Pressure Drop (in. wc)
Sizes 18 – 36
kW
0 3, 5 8, 10 9, 15 20
External Static Pressure Correction
+.02 +.01
0 -.02 -.04
Heater Elements
0 1 2 3 4 6
Sizes 42 – 60
kW
0 3, 5 8, 10 9, 15 20 18, 24, 30
External Static Pressure Correction
+.04 +.03 +.02
0 -.02 -.10
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 14
FJ5: Installation Instructions
Ton (Size)
1-1/2 (18)
2 (24)
2-1/2 (30)
3 (36)
3-1/2 (42)
4 (48)
5 (60)
Blower Speed
Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3
Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5
Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1
0.1 754 695 695 643 487 1021 936 936 846 746 1247 1133 1133 1040 896 1433 1304 1304 1183 1020 1571 1517 1517 1369 1135 1896 1711 1711 1547 1397 2109 2109 2109 1901 1583
Table 8 Airflow Performance (CFM) Wet
External Static (in. wc)
0.2
0.3
0.4
0.5
0.6
0.7
737
717
694
668
641
605
678
655
628
600
573
551
678
655
628
600
573
551
620
591
557
534
506
477
448
428
394
358
325
281
1003
964
925
876
838
797
907
873
805
779
732
696
907
873
805
779
732
696
831
792
739
702
651
609
697
629
567
521
477
446
1215
1188
1154
1122
1083
1053
1114
1082
1044
1009
968
924
1114
1082
1044
1009
968
924
997
961
929
883
828
782
862
805
740
689
648
597
1404
1363
1328
1282
1251
1201
1277
1256
1230
1207
1168
1122
1277
1256
1230
1207
1168
1122
1148
1124
1094
1051
1005
955
995
958
921
881
840
791
1551
1508
1473
1439
1407
1372
1493
1458
1425
1392
1358
1328
1493
1458
1425
1392
1358
1328
1339
1299
1263
1226
1188
1155
1099
1048
966
908
852
802
1853
1821
1795
1760
1737
1702
1673
1643
1607
1570
1549
1509
1673
1643
1607
1570
1549
1509
1504
1466
1416
1388
1369
1324
1347
1312
1269
1232
1172
1135
2067
2043
1996
1967
1928
1899
2067
2043
1996
1967
1928
1899
2067
2043
1996
1967
1928
1899
1868
1825
1785
1737
1710
1662
1557
1499
1451
1392
1358
1313
0.8 572 520 520 439 NA 761 661 661 548 389 1017 873 873 725 NA 1145 1080 1080 901 735 1317 1295 1295 1112 755 1670 1490 1490 1290 1086 1848 1848 1848 1620 1259
0.9 528 479 479 408 NA 726 626 626 536 364 971 835 835 708 NA 1095 1073 1073 846 693 1253 1253 1253 1068 698 1665 1446 1446 1239 1038 1812 1812 1812 1584 1194
1.0 481 421 421 378 NA 689 591 591 491 326 915 785 785 667 NA 1021 983 983 783 649 1189 1193 1193 1012 587 1619 1411 1411 1200 989 1766 1766 1766 1521 1138
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 15
FJ5: Installation Instructions
Ton (Size)
1-1/2 (18)
2 (24)
2-1/2 (30)
3 (36)
3-1/2 (42)
4 (48)
5 (60)
Blower Speed
Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3
Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1 Tap 5
Tap 4 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 Tap 2 Tap 1
0.1 762 695 695 634 498 1046 992 992 900 762 1277 1179 1179 1066 923 1489 1357 1357 1211 1059 1647 1569 1569 1393 1190 1956 1773 1773 1566 1413 2148 2148 2148 1955 1646
Table 9 Airflow Performance (CFM) Dry
External Static (in. wc)
0.2
0.3
0.4
0.5
0.6
0.7
741
721
698
672
656
635
679
655
628
600
580
559
679
655
628
600
580
559
615
585
547
522
506
475
470
434
390
356
300
272
1013
978
958
925
877
830
950
916
869
812
763
705
950
916
869
812
763
705
862
814
769
709
644
594
723
651
599
531
471
428
1244
1226
1193
1169
1122
1094
1142
1114
1070
1039
998
937
1142
1114
1070
1039
998
937
1030
997
960
916
863
795
878
832
784
723
658
616
1463
1428
1388
1345
1305
1262
1337
1310
1283
1249
1212
1165
1337
1310
1283
1249
1212
1165
1190
1162
1132
1100
1066
1016
1038
1004
967
925
887
843
1620
1583
1548
1505
1464
1424
1539
1506
1476
1442
1404
1370
1539
1506
1476
1442
1404
1370
1355
1329
1288
1248
1223
1180
1138
1083
1020
936
869
814
1917
1887
1855
1831
1798
1763
1743
1704
1667
1634
1612
1571
1743
1704
1667
1634
1612
1571
1524
1483
1451
1414
1376
1340
1373
1328
1283
1246
1204
1168
2123
2084
2048
2002
1974
1939
2123
2084
2048
2002
1974
1939
2123
2084
2048
2002
1974
1939
1913
1868
1833
1796
1757
1711
1590
1527
1496
1442
1373
1315
0.8 577 534 534 444 NA 752 660 660 548 385 1058 915 915 746 563 1213 1114 1114 959 791 1379 1336 1336 1138 762 1743 1536 1536 1303 1120 1891 1891 1891 1654 1294
0.9 547 505 505 407 NA 722 611 611 507 345 1014 867 867 703 NA 1160 1064 1064 905 747 1319 1299 1299 1091 728 1707 1500 1500 1266 1075 1893 1893 1893 1632 1221
NOTES: 1.Airflow based upon dry coil at 230V with factory-approved filter and electric heater (2 element heater sizes 18 through 36, 3 element heater sizes 42 through 60). 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 42 – 60 sizes must have supply static greater than 0.20 in. wc. Airflow above 400 cfm/ton on 48-60 size could result in condensate blowing off coil or splashing out of drain pan.
1.0 509 452 452 371 NA 687 585 585 451 319 969 825 825 674 NA 1093 1014 1014 838 681 1250 1219 1219 1037 631 1683 1464 1464 1217 1012 1812 1812 1812 1570 1164
© 2024 Carrier. All rights reserved. A Carrier Company
Edition Date: 3/24
Catalog No: IM-FJ5-01 Replaces: New
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
16
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>