Carrier R-454B Fan Coil for Puron Advance Refrigerant Instruction Manual
- June 26, 2024
- Carrier
Table of Contents
R-454B Fan Coil for Puron Advance Refrigerant
Specifications
-
Product: FT5, FG5 Fan Coil for Puron AdvanceTM R-454B
Refrigerant -
Capacity: 2 thru 5 Ton
-
Refrigerant: Puron AdvanceTM R-454B
-
Designed for: Upflow, horizontal, or downflow applications
-
Nominal Cooling Capacities: 18,000 through 60,000 Btuh
-
Electric Heater Packages: 5 through 30 kW
Product Usage Instructions
Safety Considerations
Before starting the installation, ensure to follow these safety
considerations:
- Wear safety glasses, protective clothing, and work gloves.
- Use a quenching cloth for brazing operations.
- Have a fire extinguisher available.
- Read and follow all warnings and cautions in the manual.
- Consult local building codes and electrical codes.
Installation Steps
-
Unpack the unit and move it to the final location without
damaging it. -
Inspect the equipment for any damage before installation. File
a claim if necessary. -
Locate the unit rating plate for proper installation
information and check if it matches job specifications. -
If the door gasket is damaged or missing, order a gasket kit to
ensure compliance with standards.
Brazing and Condensate Pan Attention
Due to low leak requirements, special attention is needed in the
condensate pan and drain connection area when brazing tubing.
Follow the manufacturer’s guidelines for brazing operations.
Electric Heater Packages
If applicable, factory-authorized electric heater packages are
available for installation in the unit to meet heating
requirements. Ensure to follow the provided instructions for
installing these packages.
Frequently Asked Questions (FAQ)
Q: What should I do if the unit is damaged during
shipment?
A: If the unit is damaged during shipment, inspect it for damage
before installation and file a claim with the shipping company if
needed.
Q: Can I use a different refrigerant with this unit?
A: No, this unit is designed specifically for Puron AdvanceTM
R-454B refrigerant and should only be used with this refrigerant as
shipped.
FT5, FG5 Fan Coil for Puron AdvanceTM R-454B Refrigerant 2 thru 5 Ton
Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
Fig. 1 Typical Unit
A02332A
Table of Contents
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . 1 Safety Considerations . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . 1 Introduction. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 2
Check Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 2 Mount Fan Coil . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 2 Upflow Installation . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . 2 Modular Units . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Horizontal
Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. 4 Downflow Installations . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . 6 Manufactured and Mobile Home Housing Applications . . . . . .
. . 6 Air Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . 7 Electrical Connections . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . 7 Heat Staging Option. . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . 11 Manufactured Housing. .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Refrigerant
Tubing Connection and Evacuation . . . . . . . . . . . . . 12 Condensate Drain
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Leak Dissipation System . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 13 Leak Dissipation System Self-Test . . . . . . . . . . . . . . .
. . . . . . . . 14 Troubleshooting . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 15 Unit Start-Up. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Easy Select
Configuration Taps. . . . . . . . . . . . . . . . . . . . . . . . . . 16
Accessory Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 18 Fan Coil Sequence of Operation . . . . . . . . . . . . . . . . .
. . . . . . . . 18 Troubleshooting ECM Motor and Controls . . . . . . . . . .
. . . . . . . 19 Start-Up Procedures . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 19 Care and Maintenance . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . 20
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 the kits or accessories when installing.
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 warning 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. When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION, and NOTE. 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.
! 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.
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
! 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.
! 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.
! 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
Model FT5, FG5 Fan Coil units are designed for flexibility and can be used for
upflow, horizontal, or downflow (kits required on manufactured and mobile
home) applications. These units are designed specifically for Puron AdvanceTM
refrigerant R-454B refrigerant and must be used only with Puron AdvanceTM
refrigerant R-454B refrigerant air conditioners and heat pumps as shipped.
These 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. Because
of this, the units need special attention in the condensate pan and drain
connection area and when brazing tubing.
These units are available for application in systems of 18,000 through 60,000
Btuh nominal cooling capacities. Factory-authorized, field-installed electric
heater packages are available in 5 through 30 kW. See Product Data for
available accessory kits.
Installation
Check Equipment
Unpack unit and move to final location. Remove carton taking care not to
damage unit.
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.
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.
Mount Fan Coil
Unit can stand or lie on floor, or hang from ceiling or wall. Allow space for
wiring, piping, and servicing unit.
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 the alternative of
running a separate, secondary condensate line. Consult local codes for
additional restrictions or precautions.
NOTE: Nuisance sweating may occur if the unit is installed in a high humidity
environment with low airflow.
FT5, FG5 Fan Coils can be installed for upflow and horizontal-left
applications as factory shipped. Units can be installed for horizontal-right
applications with field modifications. Units may be converted for downflow
applications using factory-authorized accessory kits.
NOTE: To ensure proper drainage for horizontal installations, unit must be
installed so it is within 1/8 in. (3.2mm) level of the length and width of
unit.
Upflow Installation
If return air is to be ducted, install duct flush with floor. Set unit on
floor over opening. Only use return-air opening provided. All return air must
pass through the coil (see Fig. 2).
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 2
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
Fig. 2 Slope Coil Unit in Upflow Application
A07139A
Fig. 3 Slope Coil in Horizontal-Left Application (Factory Ready)
A07140B
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 3
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions A
FACTORY SHIPPED HORIZONTAL LEFT
APPLICATION
B C
DISSIPATION SENSOR CABLE ROUTING
COIL BRACKET
COIL SUPPORT
RAIL
DRAIN PAN SUPPORT BRACKET
DISSIPATION BOARD AIR SEAL ASSEMBLY
HORIZONTAL DRAIN PAN
DISSIPATION SENSOR REFRIGERANT CONNECTIONS
PRIMARY DRAIN SECONDARY DRAIN
Fig. 4 A-Coil in Horizontal-Left Application (Factory Ready)
COIL BRACKET
A240079
Modular Units
Horizontal Installations
Some sizes of the Fan Coils are available in 2-piece modular construction.
Modular construction allows installer to disassemble unit into 2 components,
coil box and blower box, for ease of installation (refer to Product Data
Sheet, and Fig. 5).
To disassemble unit, remove rear corner brackets by removing 2 screws which
secure brackets. Remove either 2 screws in each front corner of coil box, or 2
screws in blower box. Do not remove all 4 screws in each corner. Sections may
now be separated by lifting top section from lower section.
Be sure installation complies with all applicable building codes that may
require installation of a secondary condensate pan.
1. Arrange support for unit by setting it in or above secondary condensate
pan.
2. When suspending unit from ceiling dimples in casing indicate proper
location of screws for mounting metal support straps (see Fig. 4).
Horizontal-Right Conversion of Units with Slope Coils
To reassemble, reverse above procedure. Be certain to reinstall all fasteners when reassembling.
! CAUTION
2 SCREWS
BLOWER BOX 2 SCREWS
REAR CORNER BRACKET
COIL BOX
2 SCREWS
Fig. 5 Modular Unit Assembly
A95293
PROPERTY DAMAGE HAZARD Failure to follow this caution may result in property
damage. A gasket kit is required for horizontal slope coil conversion to
maintain low air leak/low sweat performance. See Product Data or contact your
supplier for the kit number.
1. Remove blower and coil access panels and fitting panel (Fig. 6). 2.
Disconnect sensor on drain pan and cut wire tie securing sensor
harness to the coil. 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). 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.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 4
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
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 per kit instructions. See Product Data for kit
number.
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.
COIL BRACKET
COIL SUPPORT RAIL
DRAIN PAN SUPPORT BRACKET
Fig. 6 Slope Coil in Horizontal-Right Application
A
REFRIGERANT CONNECTIONS
HORIZONTAL RIGHT
APPLICATION
B C
A230499
AIR SEAL ASSEMBLY
DISSIPATION BOARD
DISSIPATION HORIZONTAL
SENSOR
DRAIN PAN
DISSIPATION SENSOR CABLE ROUTING
PRIMARY DRAIN SECONDARY DRAIN
Fig. 7 A-Coil in Horizontal-Right Application
A240080
Horizontal Right Conversion of Units With A-Coil
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. 21).
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.
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.
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.
8. Convert air seal assembly for horizontal right. a. Remove air seal
assembly from coil by removing 4 screws (Fig. 22).
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 5
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
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. 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. Reconnect the sensor wire harness by following the routing
shown in Fig. 7. 13. Remove two oval fitting caps from left side of the coil,
access panel, and fitting panel. 14. Remove insulation knockouts on right side
of coil access panel. 15. Remove 2 oval coil access panel plugs and reinstall
into holes on left side of coil access panel and fitting panel. 16. 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. 17. 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. 18. Make sure liquid and suction tube grommets are in place to prevent
air leaks and cabinet sweating.
Downflow Installations
! CAUTION
UNIT OR PROPERTY DAMAGE HAZARD Failure to follow this 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
units. The vertical drains have an overflow hole between the primary and
secondary drain holes. This hole is plugged for all applications except
downflow, but must be used for downflow. During the conversion process, remove
the plastic cap covering the vertical drains only and discard. Remove the plug
from the overflow hole and discard. At completion of the downflow
installation, caulk around the vertical pan fitting to door joint to retain
the low air leak performance of the unit.
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 1/4-in. (3.2 to 6.4mm) 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 1/4-in. (3.2 to 6.4mm) thick, between duct, unit,
and floor.
! CAUTION
PROPERTY DAMAGE HAZARD Failure to follow this caution may result in property
damage. A gasket kit is required for horizontal slope coil conversion to
maintain low air leak/low sweat performance. See Product Data or contact your
supplier for the kit number.
Manufactured and Mobile Home Housing Applications
1. Fan coil unit must be secured 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-in. (8mm)
diameter lag screws. Typical both sides of fan coil.
b. If fan coil is against wall, secure fan coil to wall stud using 1/8-in.
(3mm) thick right-angle brackets. Attach brackets to fan coil using No. 10
self tapping screws and to wall stud using 5/16-in. (8mm) diameter lag screws
(see Fig. 7).
4″ (102mm) MAX
SECURE FAN COIL TO STRUCTURE UNIT AWAY FROM WALL PIPE STRAP (TYPICAL BOTH
SIDES)
OR
UNIT AGAINST WALL .125″ (3mm) MOUNTING BRACKET (TYPICAL BOTH SIDES)
DOWN FLOW BASE KIT (KFACB)
SECURE UNIT TO FLOOR ANGLE BRACKET OR PIPE STRAP
4″ (102mm) MAX
Fig. 8 A-Coil
A07567
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 6
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
Air Ducts
Connect supply-air duct over outside of 3/4-in. (19mm) flange provided on
supply-air opening. Secure duct to flange with proper fasteners for type of
duct used, and seal duct-to-unit joint. Duct connection flanges are provided
on unit air discharge connection. When using Fan Coil units with 20-, 24-, and
30-kW electric heaters, maintain a 1-in. (25mm) clearance from combustible
materials to discharge plenum and ductwork for a distance of 36 in. (914mm)
from unit. Use accessory downflow base to maintain proper clearance on
downflow installations. 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.
! 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 ft (3m) of main duct to 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
Standards 90A or B as tested by UL Standard 181 for Class 1 air ducts.
Electrical Connections
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
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 To pair an electric heater with the fan coil, remove
and discard power plug from fan coil and connect the heater plug to the 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.
Check all factory wiring per unit wiring diagram and inspect factory wiring
connections to be sure none were loosened in transit or installation.
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in
personal injury or death. Before installing or servicing system, always turn
off main power to system. There may be more than one disconnect switch. Tag
disconnect switch with a suitable warning label. Turn off accessory heater
power if applicable.
! CAUTION
PROPERTY DAMAGE HAZARD Failure to follow this caution may result in product or
property damage. If a disconnect switch is to be mounted on unit, select a
location where drill or fastener will not contact electrical or refrigerant
components.
NOTE: Before proceeding with electrical connections, make certain that supply
voltage, frequency, and phase are as specified on unit rating plate. Be sure
that electrical service provided by the utility is sufficient to handle the
additional load imposed by this equipment. See unit wiring label for proper
field high- and low-voltage wiring. Make all electrical connections in
accordance with 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. 24V Control System Connections to Unit Printed
Circuit Board (PCB) Refer to unit wiring instructions for recommended wiring
procedures. Use No. 18 AWG color-coded, insulated (35°C minimum) wires to make
low-voltage connections between thermostat and unit. If thermostat is located
more than 100 ft (30m) from unit (as measured along the low-voltage wires),
use No. 16 AWG color-coded, insulated (35°C minimum) wires. PCB is circuited
for single-stage heater operation. When additional heater staging is desired
as applicable, remove Jumper J2 on PCB to enable staging. Connect low-voltage
leads to thermostat and outdoor unit (see Fig. 13 through Fig. 16). Easy
Select Board Jumpers J1 This jumper must be pulled to activate
dehumidification mode. The jumper connects R to DH. With the jumper in, the DH
terminal is always energized. With the jumper pulled, the DH terminal is de-
energized. A control such as the thermidistat must be used to supply the 24V
signal when there is no call for dehumidification, and turn off the 24V when
there is a call for dehumidification. J2 This jumper activates heat staging.
The jumper connects the W1 and W2 terminals together. If either is energized,
W2 airflow is delivered. With the jumper pulled, there are separate airflows
for W1 and W2. J4 This jumper is for InteliSenseTM operation (FT5). As
shipped, Y1 is connected to Y/Y2 by a field-removable jumper J4. With the
jumper in place, in single stage operation InteliSenseTM communication is
enabled. For 2-stage application, remove jumper J4.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 7
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
A98477A
Fig. 9 FT5 Models, Fan Coil Wiring with 1-Speed Air Conditioner
A98478A
Fig. 10 FT5 Models, Fan Coil Wiring with 2-Speed Air Conditioner
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 8
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
A98475A
Fig. 11 FT5 Models, Fan Coil Wiring with 1-Speed Heat Pump
A02005A
Fig. 12 FT5 Models, Fan Coil Wiring with 2-Speed Heat Pump
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 9
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
Y/Y2 W1 R W2
G
ACC
C
R
(Pin 1)
Common (Pin 8)
YEL Y-IN
(Pin 5)
WHT W-IN
(Pin 3)
Red
SEC-2
Red
24V
BLK
SEC-1
BRN
Common
Jumper Informa J1 IS REMOVED FOR DEHUMIDIFY MODES J2 IS REMOVED FOR HEAT STAGING
DH
J1
R
R
W-OUT
(Pin 7)
WHT/VIO
W1
J2
W2
Y-OUT
(Pin 4)
YEL/VIO
Y1
Y/Y2
Y
G
HUMIDIFIER (24 VAC)
O
C
C
A240275
Fig. 13 FG5 Models, Fan Coil Wiring with 1-Speed Air Conditioner
Y1 W1
R
W2
Y/Y2 G
ACC
C
Pin 1
(24V)
Common (Pin 8)
YEL Y-IN
(Pin 5)
WHT W-IN
(Pin 3)
Red
SEC-2
Red
24V
BLK
SEC-1
BRN
Common
Jumper Information
J1 IS REMOVED FOR DEHUMIDIFY MODES J2 IS REMOVED FOR HEAT STAGING
DH
J1
R
R
W-OUT
(Pin 7)
WHT/VIO
W1
J2
W2
Y-OUT
(Pin 4)
YEL/VIO
Y1
Y1
Y/Y2
Y2
G
HUMIDIFIER (24 VAC)
O
C
C
A240276
Fig. 14 FG5 Models, Fan Coil Wiring with 2-Speed Air Conditioner
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 10
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
Y1 W1
R
W2
G O C
ACC
Pin 1
(24V)
Common (Pin 8)
YEL Y-IN
(Pin 5)
WHT W-IN
(Pin 3)
Red
SEC-2
Red
24V
BLK
SEC-1
BRN
Common
Jumper Information J1 IS REMOVED FOR DEHUMIDIFY MODES J2 IS REMOVED FOR HEAT STAGING
DH
J1
R
R
W-OUT
(Pin 7)
WHT/VIO
W1
J2
W2
Y-OUT
(Pin 4)
YEL/VIO
Y1
Y/Y 2
W2 Y
G
O
O
C
C
HUMIDIFIER (24 VAC)
Y1 W1
R
W2
Y/Y2 G O C
ACC
Pin 1
(24V)
Common (Pin 8)
YEL Y-IN
(Pin 5)
WHT W-IN
(Pin 3)
Red
SEC-2
Red
24V
BLK
SEC-1
BRN
Common
Jumper Information
J1 IS REMOVED FOR DEHUMIDIFY MODES J2 IS REMOVED FOR HEAT STAGING
DH
J1
R
R
W-OUT
(Pin 7)
WHT/VIO
W1
J2
W2
Y-OUT
(Pin 4)
YEL/VIO
Y1
Y/Y2
W1
Y1 Y2
G
O
O
C
C
HUMIDIFIER (24 VAC)
A240277
Fig. 15 FG5 Models, Fan Coil Wiring with 1-Speed Heat Pump
A240278
Fig. 16 FG5 Models, Fan Coil Wiring with 2-Speed Heat Pump
Heat Staging Option
Heat staging of the electric heat package is possible when the Fan Coil is installed as a part of a single speed heat pump system using a corporate 2-speed thermostat or capable zoning control and any one of the following electric heat packages:
Relay Heaters
KFFEH2901N09
KFFEH3001F15
KFFEH3101C15
KFFEH3201F20
KFFEH3301C20
Complete system low-voltage wiring as shown in Fig. 13 thru Fig. 16.
NOTE: Where local codes require thermostat wiring be routed through conduit or
raceways, splices can be made inside the fan coil unit. All wiring must be NEC
Class l and must be separated from incoming power leads.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 11
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
A factory authorized disconnect kit is available for installation of all
single phase 3kW 10kW heaters. When electric heat packages with circuit
breakers are installed, the circuit breaker can be used as a disconnect. The
factory installed location for the dissipation board interferes with the 24kW,
and 30kW heaters. To account for this, an enclosure is included with the
heater kit. Follow all Electric Heat Instructions on how to move the
dissipation board into the enclosure on the outside of the unit.. Transformer
is factory wired for 230V operation. For 208V applications, disconnect black
wire from 230V terminal on transformer and connect it to 208V terminal (see
Fig. 17).
SECONDARY
BRN RED
PRIMARY
YEL BLK
C 208 230
YEL / GRN TO GROUND LUG
Fig. 17 Transformer Connections
A05182A
The secondary circuit of transformer is protected by a 5-amp fuse
mounted on printed-circuit board.
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. A corporate thermostat in conjunction with an outdoor sensor
can be used to lock out supplemental heat above 40°F (4°C). Refer to
thermostat instructions for details. If a non-corporate thermostat is used, an
outdoor thermostat may be required.
Ground Connections
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in
personal injury 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.
NOTE: Use UL listed conduit and conduit connector to connect supply wire(s) to
unit and obtain proper grounding. Grounding may also be accomplished by using
grounding lug provided in control box.
Use of dual or multiple supply circuits will require grounding of each circuit
to ground lugs provided on unit and heaters.
Refrigerant Tubing Connection and Evacuation
Insulate entire suction tube. Do not use damaged, dirty, or contaminated
tubing because it may plug refrigerant flow control device.
Always evacuate 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. 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). Consult local
code requirements.
! 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.
4. Evacuate coil and tubing system to 500 microns using deep vacuum method.
Condensate Drain
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.
! CAUTION
UNIT OR PROPERTY DAMAGE HAZARD Failure to follow this 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
units. The vertical drains have an overflow hole between the primary and
secondary drain holes. This hole is plugged for all applications except
downflow, but must be used for downflow. During the conversion process, remove
the plastic cap covering the vertical drains only and discard. Remove the plug
from the overflow hole and discard. At completion of the downflow
installation, caulk around the vertical pan fitting to door joint to retain
the low air leak performance of the unit.
Units are equipped with primary and secondary 3/4-in. (19mm) FPT drain
connections. For proper condensate line installation see Fig. 2, Fig. 4, Fig.
5, Fig. 6, and Fig. 8. To prevent property damage and achieve optimum drainage
performance, BOTH primary and secondary drain lines should be installed and
include properly-sized condensate traps (see Fig. 18 and Fig. 20). Factory-
approved condensate traps are available. Be sure to install plastic push-in
plugs in unused condensate drain fittings. It is recommended that PVC fittings
be used on the plastic condensate pan. Do not over-tighten. Finger-tighten
plus 1-1/2 turns. Use pipe dope.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 12
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
UNIT
2″ MIN (51 mm)
2″ MIN (51 mm)
Fig. 18 Recommended Condensate Trap
A03002
! CAUTION
PROPERTY DAMAGE HAZARD Failure to follow this caution may result in product or property damage. Shallow running traps are inadequate and DO NOT allow proper condensate drainage (see Fig. 19).
DO NOT USE SHALLOW RUNNING TRAPS!
Fig. 19 Insufficient Condensate Trap
A03013
NOTE: When connecting condensate drain lines avoid blocking filter access panel. Prime both primary and secondary condensate traps after connecting to drain pan.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 3/4-in. (19mm) 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 condensate lines as close to the coil as possible (Fig. 20). 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.
PRIMARY TRAP REQUIRED (USE FACTORY KIT OR
FIELD-SUPPLIED TRAP OF SUFFICIENT DEPTH.
STANDARD P-TRAPS ARE NOT SUFFICIENT. SEE
FIGURE OF RECOMMENDED CONDENSATE TRAP)
FILTER ACCESS PANEL
SECONDARY DRAIN WITH APPROPRIATE TRAP REQUIRED (USE FACTORY KIT OR FIELD-
SUPPLIED TRAP)
Fig. 20 Proper Condensate Trap
A03003
Condensate drain lines should be pitched downward at a minimum of 1 in. (25mm) for every 10 ft. (3m) of length. Consult local codes for additional restrictions or precautions.
! CAUTION
UNIT COMPONENT HAZARD Failure to follow this caution may result in product
damage. Never operate unit without a filter. Damage to blower motor or coil
may result. Factory authorized filter kits must 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
duct system.
IMPORTANT: Factory authorized filters must be used when locating the filter
inside the unit (see Table 1).
Table 1 Filter Kits
FILTER KIT (12 PACK)
PART NUMBER AFAFLTMED12A AFAFLTLRG12A AFAFLTXXL12A
SIZE USED WITH 24
36, 48 60
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 24-60 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 36, the sensor will always be installed on the
drain pan clip.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 13
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
! WARNING
PRODUCT OPERATION / INJURY HAZARD Failure to follow this warning could cause
property 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.
A230490
Fig. 21 Dissipation Sensor Mounted on Drain Clip For sizes 24, 48-60, the
sensor comes factory installed on the delta plate (Fig. 22, Fig. 23). For
horizontal right and left, the sensor will need to be moved to the drain pan
clip (Fig. 21, Fig. 5, Fig. 6, Fig. 7). 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.
! 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.
A230502
Fig. 23 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. 17 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 p15).
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. 22 A-Coil Vertical Dissipation Sensor Factory Location
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 14
Fan Coil for Puron AdvanceTM R-454B Refrigerant: 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
Unit Start-Up
Refer to outdoor unit Installation Instructions for system start-up
instructions and refrigerant charging method details.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 15
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
Easy Select Configuration Taps
Easy Select taps are used by the installer to configure a system. The ECM
motor uses the selected taps to modify its operation to a pre-programmed table
of airflows (see Table 8 and Table 10). Airflows are based on system size or
mode of operation and those airflows are modified in response to other inputs
such as the need for de-humidification (see Fig. 24 and Fig. 25 and Table 6).
LOW VOLTAGE TERMINAL BLOCK
A.
B.
A BC D
C.
A BC D
D.
E.
F.
A95276B
Fig. 25 Connection Detail of Printed-Circuit Board (also showing 12-pin
cable), applicable to FT5, FG5
MOLEX 12-PIN CONNECTOR
Fig. 24 Detail of Printed-Circuit Board
A95275BB
(bottom part of board is InteliSense for FT5 only)
The Fan Coil must be configured to operate properly with system components
with which it is installed. To successfully configure a basic system (see
information printed on circuit board label located next to select pins), move
the 6 select wires to the pins which match the components used.
A 16×4 motor signal translator is present for the translation of data from the
board to the motors and is mounted on the back of the PCB bracket. Ensure that
the connections are secure.
Table 6 Airflow Adjustment Table
Unit Size
AUX Heat Range (kW/CFM)
VIO
A
B
C
D
24
0-20 / 1200 0-15 / 1050 0-10 / 750 0-5 / 700
36
0-20 / 1225 0-15 / 1050 0-10 / 750 0-5 / 700
48
0-30 / 1500 0-20 / 1350 0-15 / 1200 0-10 / 1000
60
0-30 / 1750 0-20 / 1350 0-15 / 1250 0-10 / 1200
AC/HP Size
BLU
A
B
C
D
24
036
030
024
018
36
042
036
030
024
48
048
042
036
030
60
060
048
042
036
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 16
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
AUX HEAT KW/CFM – Select Heater Range For Size of Electric Heater Installed
Installer must select the auxiliary heat airflow approved for application with
kW size heater installed. If no heater is installed, this step can be skipped.
Each select pin is marked with a range of heaters for which airflow, also
marked, is approved. For increased comfort select the narrowest kW range
matching the heater size, for example, 0-10 for 10-kW heater. This airflow
must be greater than the minimum CFM for electric heater application with the
size system installed for safe and continuous operation (see Table 11 and
Table 12 for airflow delivery and minimum CFM). Note that airflow marked is
the airflow which will be supplied in emergency heat mode and heating mode on
air conditioners when electric heat is the primary heating source. In heat
pump heating mode when electric heaters are energized, the ECM motor will run
the higher of heat pump heating airflow and electric heater airflow to ensure
safe heater operation. The factory selection is the largest heater range
approved (see Fig. 24, A as indicated).
AC/HP SIZE – Select System Size Installed
The factory setting for air conditioner or heat pump size is the largest unit
meant for application with the model of fan coil purchased. Installer needs to
select air conditioner or heat pump size to ensure that airflow delivered
falls within proper range for the size unit installed. This applies to all
operational modes with the exception of electric heat modes (see Fig. 24, B as
indicated).
SYSTEM TYPE – Select System Type Installed AC or HP
The type of system must be selected:
1. AC – Air conditioner
2. HP-COMFORT – Heat Pump Comfort provides approximately 315 CFM per ton for
higher normal heating air delivery temperature. Provides approximately 350 CFM
per ton cooling airflow for good humidity removal.
3. HP-EFF – Heat Pump Efficiency provides same airflow for heating and
cooling modes to increase overall HP efficiency; approximately 350 CFM per
ton. The factory setting is AC. (See Fig. 24, C as indicated.)
AC/HP CFM ADJUST – Select Medium, Low, or High Airflow
To provide airflow at rates described above, the AC/HP ADJUST select is
factory set to the nominal (nom) tap. The adjust selections HI/LO will
regulate airflow supplied for all operational modes, except non-heat pump
heating modes. HI provides 15% airflow over nominal unit size selected and LO
provides 10% airflow below nominal unit size selected. Adjust selection
options are provided to adjust airflow supplied to meet individual
installation needs for such things as noise, comfort, and humidity removal
(see Fig. 24, D as indicated).
ON/OFF DELAY – Select Desired Time Delay Profile
NOTE: Delay selections are active in cooling and heat pump heating modes only.
Auxiliary heating modes have a 1-minute off-delay and zero on-delay programmed
into the ECM motor that cannot be overridden.
Four motor operation delay profiles are provided to customize and enhance
system operation (see Fig. 24, E as indicated). Selection options are:
1. The standard 90-second off-delay (Factory setting) at 100% airflow.
2. No-delay option used for servicing unit or when a thermostat is utilized
to perform delay functions.
3. A 30-second on-delay with no airflow / 90-second off-delay at 100% airflow
profile is used when it is desirable to allow system coils time to heat-up
/cool-down in conjunction with the airflow.
4. ENH, enhanced selection, provides a 30-second on-delay with no airflow /
plus 150-second at 70% airflow / no off-delay for added comfort. This profile
will minimize cold blow in heat pump operation and could enhance system
efficiency.
CONTINUOUS FAN – Select Desired Fan Speed When Thermostat is Set on Continuous
Fan
NOTE: If installed with a 2-speed outdoor unit, do not select HI speed
continuous fan. If HI is selected, low speed compression will also run HI
speed possibly resulting in insufficient dehumidification.
1. LO speed – factory setting, 50% cooling mode airflow.
2. MED speed – move connector to MED, 80% cooling mode airflow.
3. HI speed – move connector of HI, 100% cooling mode airflow (see Fig. 24, F
as indicated).
Low-Voltage Circuit Fusing and Reference
The low-voltage circuit is fused by a board-mounted 5-amp automotive fuse
placed in series with the transformer 24VAC (SEC1 for FT5 and SEC2 for FG5)
and the R circuit. The C circuit of the transformer is referenced to chassis
ground through a printed circuit run at COM (SEC2 for FT5 and SEC1 for FG5)
connected to metal standoff marked with ground symbol. Basic Fan Coil
Configuration
The following basic configuration of the fan coil will provide ARI rated
performance of the heat pump:
1. AUX HEAT KW/CFM – Select the heater range for the size electric heater
installed.
2. AC/HP SIZE – Select system size installed.
3. SYSTEM TYPE – Select system type HP-EFF.
4. AC/HP CFM ADJUST – Select NOM.
5. ON/OFF DELAY – Select 0/90 profile.
6. CONTINUOUS FAN – Select desired fan speed when thermostat is set to
continuous fan.
COMFORT OPTIONS – Warmer Heating
The FT5, FG5 Fan Coils provide better than average humidity control and heated
air temperature. This configuration will improve the comfort provided by the
heat pump system if more humidity removal or if warmer heating air is desired.
While providing this improved comfort, the heat pump system will operate
efficiently, but not at the published HSPF or ARI SEER efficiency.
The following fan coil configuration is recommended for maximum heating and
cooling/dehumidifying comfort (see Fig. 24):
1. AUX HEAT KW/CFM – Select narrowest heater range to match size of electric
heater installed (skip this step if no heater is installed).
2. AC/HP SIZE – Select system size installed.
3. SYSTEM TYPE – Select system type HP-COMFORT (for heat pump system) or AC
(for air conditioner system).
4. AC/HP CFM ADJUST – Select LO.
5. ON/OFF DELAY – Select ENH profile.
6. CONTINUOUS FAN – Select desired fan speed when thermostat is set to
continuous fan.
7. If the fan coil is installed with Heat Staging capable electric heaters,
remove jumper J2 (see Fig. 24).
NOTE: If configuring to run warmer heating, do not remove jumper J2 when using
5-, 8-, or 10-kW heaters.
8. Remove jumper J1 to activate dehumidify modes.
9. Wire low voltage connections as shown in Fig. 13 thru Fig. 16.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 17
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
This configuration provides the following comfort enhancements: a. A 30-second
blower-on delay with 150 seconds at 70% airflow to allow the indoor coil to
warm up or cool down before the blower is asked to deliver 100% airflow
reducing the cold blow sensation at start-up in heating and allowing the
indoor coil to more quickly reach wet coil operating conditions in cooling. b.
No blower off-delay eliminates cold blow which may be associated with running
the blower after shut down of the compressor and avoids re-evaporation of
condensed moisture after cooling/dehumidifying operation. c. Lower airflow
while the compressor is running to reduce draft effects and increase heating
air temperature and improved humidity control during cooling operation. d.
Staging of the electric heater elements to more closely match heating load
requirements and provide more consistent heating air temperatures.
Accessory Installation
Accessory Electric Heaters
Electric heaters may be installed with the Fan Coil per instructions supplied
with electric heater package. See unit rating plate for factory-approved
electric heater kits.
NOTE: Units installed without electric heat should have a sheet metal block-
off plate covering the heater opening. This reduces air leakage and formation
of exterior condensation.
Auxiliary Terminals
The AUX and HUM terminals on the Easy Select Board are tied directly to the G
terminal, and provide a 24VAC signal whenever the G terminal is energized (see
Fig. 24).
Electronic Air Cleaner Connections
The AUX1 and AUX2 terminals are not always energized during blower operation,
as described above. When using an electronic air cleaner with the Fan Coil,
use Airflow Sensor Part No. KEAAC0101AAA. The airflow sensor turns on
electronic air cleaner when the fan coil blower is operating.
Humidifier/Humidistat Connections
Easy Select Board terminals HUM1 and HUM2 are provided for direct connection
to the low-voltage control of a humidifier through a standard humidistat (see
Fig. 26). These terminals are energized with 24VAC when G thermostat signal is
present (see Fig. 27). Alternately, the 24VAC signal may be sourced from the W
and C terminal block connections when electric heaters are used as primary
heating source.
HUMIDISTAT
HUM 1 (C)
HUM 2 (G)
24-VAC
TO HUMIDIFIER HUMIDIFIER WIRING
Fig. 26 Humidifier Wiring
A95317
Dehumidify Capability with Standard Humidistat Connection
Latent capacities for systems using the Fan Coil are better than average systems. If increased latent capacity is an application requirement, the field wiring terminal block provides connection terminals for use of a standard humidistat. The Fan Coil will detect the humidistat contacts opening on increasing humidity and reduce its airflow to approximately 80% of nominal cooling mode airflow. This reduction will increase the system latent capacity until the humidity falls to a level which causes the humidistat to close its contacts. When the contacts close, the airflow will return to 100% of the selected cooling airflow. To activate this mode, remove Jumper J1 and wire in a standard humidistat (see Fig. 27).
EASY SELECT BOARD TERMINAL
BLOCK
J1
DH
REMOVE
R
JUMPER
HUMIDISTAT
Fig. 27 Humidistat Wiring for De-Humidify Mode A95316
Dehumidify Capabilities
This model fan coil is capable of responding to a signal from indoor system
control. No special setup or wiring of fan coil is required.
Fan Coil Sequence of Operation
The FT5, FG5 will supply airflow in a range which is more than twice the range
of a standard fan coil. It is designed to provide nominal cooling capacities
at a 50°F (10°C) evaporator temperature and the required airflow which enables
it to match with 4 air conditioner or heat pump system sizes. Table 7 outlines
the CFM range for the different Fan Coil sizes.
Continuous Fan · Thermostat closes circuit R to G. · The blower runs at
continuous fan airflow.
Cooling Mode – Single Speed · If indoor temperature is above temperature set
point and humidity is
below humidity set point, thermostat closes circuits R to G, R to Y/Y2 and R
to O. · The fan coil delivers single speed cooling airflow.
Cooling Mode – Dehumidification · If indoor temperature is above temperature
set point and humidity is
above humidity set point, thermostat closes circuits R to G, R to O, and R to
Y/Y2, and humidistat opens R to DH. · The fan coil delivers airflow which is
approximately 80% of the nominal cooling airflow to increase the latent
capacity of the system.
Electric Heat Heating Mode · Thermostat closes circuit R to W/W1, or W2. · The
fan coil delivers the selected electric heat airflow. Heat Pump Heating Mode –
Single Speed · Thermostat closes circuits R to G and R to Y/Y2. · The fan coil
delivers single speed heat pump heating airflow.
Heat Pump Heating with Auxiliary Electric Heat · Thermostat closes circuits R
to G, R to Y/Y2 and/or R to Y1 with R to
W/W1 or W2 (and R to O in the case of defrost). · In the event that electric
heating is called for by the thermostat while
the heat pump is also operating in either heating or defrost modes, the motor
will modify its airflow output, if necessary, to provide an airflow which is
defined as safe for the operation of the electric heater during heat pump
operation. That airflow is the greater of the heat pump heating airflow and
the electric heater only airflow.
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).
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 18
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
Troubleshooting ECM Motor and Controls
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this caution may result in personal
injury. High voltage is always present at motor. Disconnect power to unit
before removing or replacing connectors or servicing motor. Wait at least 5
min after disconnecting power before opening motor.
The ECM motor used with this product contains two parts: the control module
and motor winding section. Do not assume the motor or module is defective if
it will not start. Go through the steps described below before replacing
control module, Easy Select Board or entire motor. The control module is
available as a replacement part. If Motor Turns Slowly: 1. Replace the panel.
Motor may appear to run slowly if the access
panel is removed. 2. It is normal operation to run noticeably slower if G
terminal is not
energized in cooling or heat-pump modes. If Motor Does Not Run: Turn off power
and check the following: 1. Check 5 amp fuse on Easy Select Board. 2. Check
for 24VAC on SEC1 and SEC2. If no voltage is present,
check transformer. 3. Check all plugs and receptacles for any deformation
which could
cause loose connections. Be sure plugs are fully seated. 4. Verify that
approximately 230VAC is present at motor. 5. Verify low-voltage control
signals to motor. The motor receives its
control signals through the 12-pin plug (PL-1) on Easy Select Board and 16-pin
plug on wiring harness (see Troubleshooting Example). The combinations of pins
energized will determine motor speed (see Fig. 27). See Fig. 24for circuit
board, low-voltage screw terminals energized and for voltage present at each
pin on 12-pin plug (PL-1). See Fig. 24 for pin number on 16-pin plug which
should have voltage when Easy Select Board screw terminals have 24VAC. Use
Following Procedure To Check Control Signals: THERMOSTAT 1. Remove all
thermostat wires from Easy Select Board. 2. Jumper screw terminals (1 at a
time): R-G, R-Y/Y2, R-Y1, R-W1. If motor runs in all cases, thermostat is mis-
wired, configured incorrectly or defective. If motor runs in some cases, but
not others, continue to check wiring harness and circuit board. WIRING HARNESS
- Shut off power to unit; wait 5 min. 2. Remove 5-pin plug from motor. 3. Remove 16-pin plug from motor. 4. Remove 4-pin plug from motor. 5. Replace 5-pin plug and turn power on. 6. Check for appropriate voltages on 16-pin connector with screw terminals jumpered. (See Fig. 24 for values and see examples below.) If signals check correctly and motor does not run, inspect wiring harness for loose pins or damaged plastic that could cause poor connections. If connections are good, either control module or motor is defective. If proper signals are not present, check circuit board using procedure below:
12-PIN PLUG (PL-1) ON EASY SELECT BOARD 1. Unplug harness from board. 2. Check
for appropriate voltages on pins with Easy Select Board
screw terminals jumpered (see Fig. 24 for values and see example below). If
proper signals are not present, replace Easy Select Board. If present at board
and not at 16-pin connector, wiring harness is defective.
TROUBLESHOOTING EXAMPLE: Motor is not running on a call for heat-pump heating.
System is a single-speed heat pump.
1. After performing checks in Thermostat section, follow steps 1 thru 5 in
Wiring Harness section. Then proceed with example.
2. With all thermostat wires removed from Easy Select Board, place a jumper
wire between R and Y/Y2 low-voltage screw terminals on the Easy Select board.
3. Check Fig. 24 for pin number on 16-pin connector associated with the Y/Y2
signal. The correct pin is #14. The far right column shows that (-)12vdc
should be present between pin #14 and pin #1 (common) on the 16-pin connector.
4. Set meter to read DC voltage. Place meter between pins #1 and #14 and
check for (-)12VDC (common side of meter on pin #1). If signal is present, the
problem is in the module or motor. If signal is not, problem is either in
wiring harness or Easy Select Board.
These steps can be repeated for other modes of operation. To check Easy Select
Board: 1. Leave jumper wire in place between R and Y/Y2. 2. Check Fig. 24
under “Wiring Harness Connection to Easy Select
Board” column and row for pin #14 to see pin# on Easy Select Board that should
have voltage. The correct pin is #2. The column on far right will show voltage
that should be present between pin #2 and #9 (or #10 common). 3. Place meter
between pins #2 and #9 on Easy Select Board and check for (-)12VDC. 4. Remove
4-pin plug from the Motor Signal Translator. 5. If voltage is present, the
wiring harness is bad; if not, the Easy Select Board is bad. Verify Motor
Winding Section:
Before proceeding with module replacement, check the following to ensure motor
winding section is functional. With control module removed and unplugged from
winding section: 1. The resistance between any 2 motor leads should be
similar. 2. The resistance between any motor lead and the unpainted motor end
plate should be greater than 100K ohms. If motor winding section fails one of
these tests, it is defective and must be replaced.
Start-Up Procedures
Refer to outdoor unit Installation Instructions for system start-up
instructions and refrigerant charging method details.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 19
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
Care and Maintenance
! WARNING
ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in
personal injury or death. Disconnect all power to unit before servicing field
wires or removing control package. The disconnect (when used) on access panel
does not disconnect power to the line side of disconnect, but does allow safe
service to all other parts of unit. If unit does not have a disconnect,
disregard the foregoing. Instead, make sure that a disconnecting means is
within sight from, and is readily accessible from, the unit. Disconnect all
electrical power to unit before performing any maintenance or service on it.
For continuing high performance, and to minimize possible equipment failure,
it is essential that periodic maintenance be performed on this equipment. The
only required maintenance that may be performed by the consumer is filter
maintenance. The minimum maintenance requirements for this equipment are as
follows:
1. Inspect and clean or replace air filter each month or as required. 2.
Inspect cooling coil, drain pan, and condensate drain each cooling
season for cleanliness. Clean as necessary. 3. Inspect blower motor and wheel
for cleanliness each heating and
cooling season. Clean as necessary. 4. Inspect electrical connections for
tightness and controls for proper
operation each heating and cooling season. Service as necessary. Consult Fan
Coil Service Manual available from equipment distributor for maintenance
procedures.
! 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 and gloves when handling parts.
Use the outdoor unit’s Owner’s/User Manual to explain the system operation to
the consumer, with particular emphasis on indoor fan coil operation sounds and
filter maintenance.
FAN COIL SIZE 24 36 48 60
Table 7 CFM Range
SYSTEM SIZES 24, 30, 36
24, 30, 36, 42 36, 42, 48 42, 48, 60
CFM RANGE 315-1210 315-1410 395-1800 475-2015
UNIT SIZE
OUTDOOR UNIT
CAPACITY
18 24 24 30 36 24 30 36 36 42 30 36 48 42 48 36 42 60 48 60
Table 8 Airflow Delivery (CFM) in Cooling Mode
OPERATING MODE
SINGLE–SPEED APPLICATION
TWO–SPEED APPLICATION
Nominal A/C
Cooling
525 700 875 1050 700 875 1050 1225 875 1050 1225 1400 1050 1225 1400 1750
A/C Cooling Dehumidity
420 560 700 840 560 700 840 980 700 840 980 1120 840 980 1120 1400
High Speed
Nominal A/C
Cooling
A/C Cooling Dehumidity
—
—
700
560
—
—
1050
840
700
560
—
—
1050
840
—
—
—
—
1050
840
—
—
1400
1120
1050
840
—
—
1400
1120
1750
1400
Low Speed
Nominal A/C
Cooling
A/C Cooling Dehumidity
—
—
560
450
—
—
840
670
560
450
—
—
840
670
—
—
—
—
840
670
—
—
1120
895
840
670
—
—
1120
895
1400
1120
FAN ONLY
Lo
Med
350
420
350
560
435
700
525
840
350
560
435
700
525
840
610
980
434
700
525
840
610
980
700
1120
525
840
610
980
700
1120
875
1400
NOTES: 1.The above airflows result with the AC, HP CFM ADJUST select jumper set on NOM. 2.Air flow can be adjusted +15% or -10% by selecting HI or LO respectively for all modes except fan only. 3.Dry coil at 230 volts and with 10KW heater and filter installed. 4.Airflows shown are at standard air conditions.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 20
High
525 700 875 1050 700 875 1050 1225 875 1050 1225 1400 1050 1225 1400 1750
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
UNIT SIZE
24 36 48 60
OUTDOOR UNIT
CAPACITY
18 24 30 36 24 30 36 42 30 36 42 48 36 42 48 60
Table 9 Cooling Airflow Delivery (CFM) when pairing with 37MU* (2-Speed ODU)
OPERATING MODE
TWO–SPEED APPLICATION
FAN ONLY
High Speed
Low Speed
Nominal
A/C
Nominal
A/C
Lo
A/C
Cooling
A/C
Cooling
Cooling
Dehumidity
Cooling
Dehumidity
525
420
420
350
350
700
560
560
450
350
875
700
700
560
435
1050
840
840
670
525
700
560
560
450
350
875
700
700
560
435
1050
840
840
670
525
1225
980
980
450
610
875
700
700
560
434
1050
840
840
670
525
1225
980
980
785
610
1400
1120
1120
895
700
1050
840
840
670
525
1225
980
980
785
610
1400
1120
1120
895
700
1750
1400
1400
1120
875
Med
420 560 700 840 560 700 840 980 700 840 980 1120 840 980 1120 1400
High
525 700 875 1050 700 875 1050 1225 875 1050 1225 1400 1050 1225 1400 1750
Table 10 Airflow Delivery (CFM) in Heat Pump Only Heating Mode
UNIT SIZE
OUTDOOR UNIT
CAPACITY
SINGLE–SPEED APPLICATION
Heat Pump Heat Pump Comfort Efficiency
18 24 24 30 36 24 30 36 36 42 30 36 48 42 48 36 42 60 48 60
470 630 785 945 630 785 945 1100 787.5 945 1100 1260 945 1100 1260 1575
525 700 875 1050 700 875 1050 1225 875 1050 1225 1400 1050 1225 1400 1750
OPERATING MODE
TWO–SPEED APPLICATION
High Speed
Heat Pump Comfort
Heat Pump Efficiency
—
—
630
700
—
—
945
1050
630
700
—
—
945
1050
—
—
—
—
945
1050
—
—
1260
1400
945
1050
—
—
1260
1400
1575
1750
Low Speed
Heat Pump Comfort
Heat Pump Efficiency
—
—
505
560
—
—
755
840
505
560
—
—
755
840
—
—
—
—
755
840
—
—
1010
1120
755
840
—
—
1010
1120
1260
1400
NOTES: 1.The above airflows result with the AC, HP CFM ADJUST select jumper
set on NOM. 2.Air flow can be adjusted +15% or -10% by selecting HI or LO
respectively for all modes except fan only.
3.Dry coil at 230 volts and with 10KW heater and filter installed. 4.Airflows
shown are at standard air conditions.
FAN ONLY
Lo
Med
High
350
420
525
350
560
700
435
700
875
525
840
1050
350
560
700
435
700
875
525
840
1050
610
980
1225
435
700
875
525
840
1050
610
980
1225
700
1120
1400
525
840
1050
610
980
1225
700
1120
1400
875
1400
1750
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 21
Fan Coil for Puron AdvanceTM R-454B Refrigerant: Installation Instructions
FAN UNIT SIZE
24
36
FAN UNIT SIZE
48
60
OUTDOOR UNIT
CAPACITY BTUH
18,000 24,000 30,000 36,000 24,000 30,000 36,000 42,000
OUTDOOR UNIT
CAPACITY BTUH
30,000 36,000 42,000 48,000 36,000 42,000 48,000 60,000
Lo 700 700 875 1050 700 875 1050 1225
Lo 1000 1000 1225 1400 1200 1225 1400 1750
0-5 Nom 700 700 875 1050 700 875 1050 1225
0-10 Nom 1000 1000 1225 1400 1200 1225 1400 1750
Table 11 Airflow Delivery (CFM)
ELECTRIC HEATER kW RANGE
0-10
0-15
High 805 805 1006 1208 805 1006 1208 1409
Lo 750 750 875 1050 750 875 1050 1225
Nom 750 750 875 1050 750 875 1050 1225
High 863 863 1006 1208 863 1006 1208 1409
Lo — 1050 1050 1050 1050 1050 1050 1225
Nom —
1050 1050 1050 1050 1050 1050 1225
ELECTRIC HEATER kW RANGE
0-15
0-20
High 1150 1265 1409 1610 1380 1409 1610 2013
Lo 1200 1200 1225 1400 1250 1300 1400 1750
Nom 1200 1200 1225 1400 1250 1300 1400 1750
High 1380 1380 1409 1610 1438 1495 1610 2013
Lo — 1300 1350 1400 1350 1350 1400 1750
Nom —
1300 1350 1400 1350 1350 1400 1750
High —
1208 1208 1208 1208 1208 1208 1409
High —
1495 1553 1610 1553 1553 1610 2013
Lo — — 1200 1200 1225 1225 1208 1225
Lo — — — 1500 — — 1750 1750
NOTE: Lo, NOM, and HI refer to AC, HP CFM ADJUST selection.
— Airflow not recommended for heater/system size.
FAN COIL UNIT SIZE 24
36
48
60
Table 12 Minimum CFM for Electric Heater Application
HEAT PUMP UNIT SIZE
18 24 30 36 24 30 36 42 30 36 42 48 36 42 48 60
5 700 700 875 1050 700 875 1050 1225 — — — — — — — —
8, 9, 10 750 750 875 1050 700 875 1050 1225 1000 1100 1225 1400 1200 1225 1400 1750
CFM HEATER SIZE kW
12, 15 —
1050 1050 1050 1050 1050 1050 1225 1200 1200 1225 1400 1250 1300 1400 1750
18, 20 — —
1200 1200
— — 1208 1409 — 1300 1350 1400 1350 1350 1400 1750
NOTES: These airflows are minimum acceptable airflows as UL listed. Actual airflow delivered will be per airflow delivery chart for Electric Heating Modes.
0-20 Nom
— — 1200 1200 — — 1225 1225
High — —
1380 1380
— — 1409 1409
0-30 Nom
— — — 1500 — — 1750 1750
High — — —
1725 — —
2013 2013
24, 30 — — — — — — — — — — —
1500 — —
1750 1750
© 2024 Carrier. All rights reserved.
A Carrier Company
Edition Date: 06/24
Catalog No: IM-FT5-FG5-01
Replaces: New
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
22