ICP FVM2X2400A User Manual FAN COIL Manuals And Guides 1209404L

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These instructions must be read and understood completely before attempting installation.
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and
NOTE
The signal words DANGER, WARNING, CAU-
TION, and NOTE are used to identify levels of haz-
ard seriousness. The signal word DANGER is only
used on product labels to signify an immediate haz-
ard. The signal words WARNING, CAUTION, and
NOTE will be used on product labels and through-
out this manual and other manuals that may apply
to the product.
DANGER - Immediate hazards which will result in
severe personal injury or death.
WARNING - Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION - Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE - Used to highlight suggestions which will
result in enhanced installation, reliability, or opera-
tion.
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:
The signal word CAUTION is used throughout this
manual in the following manner:
Signal Words on Product Labeling
Signal words are used in combination with colors
and/or pictures on product labels.
TABLE OF CONTENTS
Introduction .................................... 2
Location ....................................... 2
Heater Packages ............................... 3
Position Unit ................................ 3 - 7
Air Ducts ...................................... 7
Electrical Connections ...................... 8 - 10
Refrigerant Tubing ............................. 10
Refrigerant Metering Device .................... 10
Condensate Drains ............................ 11
Blower Motor - CFM ....................... 12 - 13
Accessories .................................. 14
Sequence of Operation ......................... 15
Wiring Diagram ............................... 16
Fan Coil Airflow ........................... 17 - 19
ECM Motor and Control ........................ 19
Troubleshooting ECM Motor and Controls .... 19 -21
Start-up Procedure ............................ 22
Care and Maintenance ......................... 22
R-410A Quick Reference Guide ................. 23
DEATH, PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD
Failure to carefully read and follow this warning
could result in equipment malfunction, property
damage, personal injury and/or death.
Installation or repairs made by unqualified per-
sons could result in equipment malfunction, prop-
erty damage, personal injury and/or death.
The information contained in this manual is in-
tended for use by a qualified service technician fa-
miliar with safety procedures and equipped with
the proper tools and test instruments.
Installation must conform with local building
codes and with the National Electrical Code
NFPA70 current edition.
Specifications aresubject to change without notice 496 01 5001 03 Sep 2009
INTRODUCTION
Models FVM2X and FVM4X are designed for maximum
flexibility and can be used for upflow, horizontal left or
right, and downflow applications (accessory kit required
for downflow or horizontal right).
These units are designed to meet the low air leak
requirements currently in effect. Because of this, the units
need special attention in the condensate pan and drain
connection area and when brazing tubing.
Four fan coil sizes will combine with various outdoor unit
sizes to offer systems ranging from 11/2- 5 tons (18,000
- 60,000 BTUH) nominal cooling capacity.
All models have a factory installed and appropriately
sized hard shut-off TXV metering device.
Factory-authorized, field-installed electric heater
packages are available in sizes 5 kW through 30 kW. See
Product Specification literature for available accessory
kits.
LOCATION
Select the best position which suits the installation site
conditions. The location should provide adequate
structural support, space in the front of the unit for service
access, clearance for return air and supply duct
connections, space for refrigerant piping connections and
condensate drain line connections. If heaters are being
installed make sure adequate clearance is maintained
from supply duct work. Refer to Clearances in NO TAG.
If the unit is located in an area of high humidity, nuisance
sweating of casing may occur. On these installations a
wrap of 2" fiberglass insulation with a vapor barrier is
recommended.
Figure 1 J Clearances and Unit Dimensions
OPENING
i ("(_OPENINGI_
(SERVICE ACCESS)
38-11-82
NOTE: Internal filter can be accessed from separate filter
door. If the filter can NOT be easily accessed, a remote
filter is recommended. Refer to ACCA Manual D for
remote filter sizing.
FIRE HAZARD
Failure to maintain proper clearances could result
in personal injury, death, and/or property damage.
When heaters are installed, maintain clearances
from combustible materials as specified on unit
rating plate. Do not use plastic lined or combus-
tible flexible ducting within 36 inches of the supply
end of the fan coil.
_R_CL_N6 _ _ _in @;
No All Sides 0
Heaters From Supply Duct 0
All Sides 0
With From First 3 feet of Supply Duct to Combustibles 1
Heaters From Supply Duct to Combustibles after 3 feet 0
Unit Size A B C D E F G
2400 153A 11 193A6 15% 22_G 17% 21
3600 19¼ 11 193A6 19Y8 22_G 21Y8 21
4800 19¼ 11 193A6 19Y8 22_G 21Y8 21
6000 223A 11 193A6 221_G 22_G 24_G 24
Unit Size H (inches)
2400 4211AG
3600 537A6
4800 537A6
6000 593A6
2 496 01 5001 03
HEATER PACKAGES
Factory approved, field installed, UL listed heater
packages are available from the equipment supplier. See
unit rating plate for a list of factory approved heaters.
POSITION UNIT
Unit can stand or lie on floor, or hang from ceiling or wall.
Allow space for wiring, piping, and servicing unit.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in proper-
ty damage.
Heaters that are not factory approved could cause
damage which would not be covered under the
equipment warranty.
A. UPFLOW INSTALLATION
If return air is to be ducted through a floor, install duct flush
with floor. Set unit on floor over opening.
Side return is a field option on slope coil models. Cut
opening per dimensions shown in Figure 2. A
field-supplied bottom closure is required.
Afield fabricated auxiliary drain pan, with a sepa-
rate drain is REQUIRED for all installations over a
finished living space or in any area that may be
damaged by overflow from a restricted main drain
pan. In some localities, local codes require an aux-
iliary drain pan for ANY horizontal installation.
Figure 2 [Slope Coil Unit in Upflow Application
POWER
OPTIONS
FRONT SERVICE CLEARANCE
24 - 48 models = 21" \
60 model = 24"
UNITS
SECONDARY DRAIN
I
PRIMARY DRAIN
SUPPLIED
SUPPLY DUCT
SECONDARY DRAIN
PRIMARY DRAIN
VOLT
ENTRY
OPTIONS
II
II
II
II
II
A
SLOPE COIL UNIT
MODEL36SIZE 1A
FIELD MODIFIED
SIDE RETURN
LOCATION FOR
SLOPE COIL
UNITS ONLY
FIELD SUPPLIED
RETURN PLENUM
496 01 5001 03 3
Figure3 J ModularUnitAssembly
BRACKET
COIL BOX
2SCREWS
B. MODULAR UNITS
FVM fan coil sizes 4800 and 6000 are two-piece modular
units. This allows for modular units to be disassembled
and components moved separately to installation area for
reassembly. This process accommodates small scuttle
holes and limiting entrances to installation sites (refer to
Figure 3).
C. HORIZONTAL INSTALLATION
Unit must NOT be installed with access panels facing up
or down. Access panels must only face to the side.
FVM models are factory built for horizontal left installation
(refer to Figure 4 and Figure 5). They can be field
converted to horizontal right (accessory Gasket Kit
required - EBAC01GSK).
NOTE: When suspending unit from ceiling, dimples in
casing indicate suitable location of screws for mounting
metal support straps (refer to Figure 4).
NOTE: For optimum condensate drainage performance
in horizontal installations, unit should be leveled along its
length and width.
Figure 4 JSlope Coil In Horizontal Left Application (FVM factory configuration)
A-COIL
HORIZONTAL LEFT
FIELD
SUPPLIED
HANGING
STRAPS SECONDARY PRIMARY
DRAIN DRAIN
LOW VOLT
ENTRY
OPTIONS
POWER
ENTRY
OPTIONS
SECONDARY
DRAIN
PRIMARY
DRAIN
FRONT SERVICE CLEARANCE
(FULL FACE OF UNIT)
24 - 48 models = 21"
60 model= 24"
13/4_
FILTER ACCESS
CLEARANCE
/
4 496 01 5001 03
Figure5 [A-Coil in Horizontal Left Application (FVM factory configuration)
FACTORY SHIPPED
HORIZONTAL LEFT
APPLICATION
COIL
-- BRACKET
COIL
SUPPORT
RAI L
DRAIN PAN
SUPPORT
BRACKET
COIL
BRACKET
HORIZONTAL
DRAIN PAN
AIR SEAL
REFRIGERANT
CONNECTIONS
PRIMARY DRAIN
HORIZONTAL LEFT
SECONDARY DRAIN
HORIZONTALLEFT
Horizontal Right Conversion of Units With Slope
Coils
1. Remove blower and coil access panel and fitting
panel (refer to Figure 6).
2. Remove coil mounting screw securing coil
assembly to right side casing flange.
3. Remove coil assembly.
4. Lay fan coil unit on its right side and reinstall coil
assembly with condensate pan down (refer to
Figure 6).
5. Attach coil to casing flange using coil mounting
screw previously removed.
6. Make sure the pan cap in the fitting door is properly
seated on the fitting door to retain the low air leak
rating of the unit.
Figure 6 [ Horizontal Right Conversion Applications - Slope Coil
COIL MOUNTING BLOWER
SCREW ASSEMBLY
SLOPE COIL
SKI
REFRIGERANT
CONNECTIONS
-PRIMARY DRAIN
SECONDARY DRAIN
496 01 5001 03 5
7. Add gaskets from the
EBAC01GSK. Gasket Accessory Kit - 8. Align holes with tubing connections and
condensate pan connections, and reinstall access
panels and fitting panel. Make sure liquid and
suction tube grommets are in place to prevent air
leaks and cabinet sweating.
Figure 7 JConversion for Horizontal Right Applications -A-Coil
SUPPORT
RAI L
CONNECTIONS ASSEMBLY HORIZONTAL
RIGHT
APPLICATION
BRACKET
DRAIN
SUPPORT
BRACKET
COIL_
SUPPORT
RAIL
BRACKET
HORIZONTAL
DRAIN PAN
PRIAMRY
HORIZONTAL RIGHT
SECONDARY DRAIN
HORIZONTAL RIGHT
Horizontal Right Conversion of Units With A-Coils
1. Remove blower and coil access panel and fitting
panel (refer to Figure 7).
2. Remove metal clip securing fitting panel to
condensate pan. Remove fitting panel.
3. Remove two (2) snap-in clips securing A-coil in
unit.
4. Slide coil and pan assembly out of unit.
5. Remove horizontal drain pan support bracket from
coil support rail on left side of unit and reinstall on
coil support rail on right side of unit.
6. Convert air-seal assembly for horizontal right.
a. Remove air-seal assembly from coil by removing
four (4) screws (refer to Figure 7).
b. Remove air splitter (B) from coil seal assembly by
removing three (3) screws. (factory-shipped
inset.)
c. Remove filler plate (A) and install air splitter (B)
in place of filler plate.
d. Install filler plate (A) as shown in horizontal right
application.
e. Remove condensate troughs (C) and install on
opposite tube sheets.
f. Install hose onto plastic spout.
7. Install horizontal pan on right side of coil assembly.
8. Slide coil assembly into casing. Be sure coil
bracket on each corner of vertical pan engages coil
support rails.
9. Reinstall two (2) snap-in clips to correctly position
and secure coil assembly in unit. Be sure clip with
large offsets is used on right side of unit to secure
horizontal pan.
10. Remove two (2) oval fitting caps from left side of
the coil, access panel, and fitting panel.
11. Remove insulation knockouts on right side of coil
access panel
12. Remove two (2) oval coil access panel plugs and
reinstall into holes on left side of coil access panel
and fitting panel.
13. Install condensate pan fitting caps (from Step 10)
in the right side of the coil door making sure that the
cap snaps and seats cleanly on the back side of the
coil door. Make sure no insulation interferes with
seating of the cap.
14. Reinstall access fitting panels, aligning holes with
tubing connections and condensate pan
connections. Be sure to reinstall metal clip
between fitting panel and vertical condensate pan.
15. After brazing, make sure liquid and suction tube
grommets are in place to prevent air leaks and
cabinet sweating.
6 496 01 5001 03
F.DOWNFLOWINSTALLATION
PRODUCTORPROPERTYDAMAGEHAZARD
Failureto follow this caution may result in product
or property damage
The conversion of the fan coil to downflow re-
quires 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.
Failure to follow instructions could result in per-
sonal injury or product and property damage.
In this application, field conversion of the evaporator coil
is required using accessory Downflow Kit along with an
accessory Base Kit. Set unit on floor over opening and
use 1/8" to 1/4" thick fireproof resilient gasket between
duct, unit, and floor. Refer to installation instructions
packaged with accessory kit. See Product Specification
literature for kit part numbers.
During the conversion process, removed 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 low air leak
performance of the unit.
NOTE: Gasket kit number (EBAC01GSK) is also
required for all downflow applications to maintain low air
leak/low sweat performance.
G. MANUFACTURED HOUSING AND MOBILE HOME
APPLICATIONS
1. Fan coil unit must be secured to the structure
using field-supplied hardware.
2. Allow a minimum of 24" clearance from access
panels.
AIR DUCTS
.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"wide right-angle brackets. Attach
brackets to fan coil using No. 10 self tapping
screws and to wall stud using 5/16" lag screws
(refer to Figure 8).
Figure 8 Mobile Home or Manufactured
Housing Applications
,---...._..
4" MAX
/
-_)_:_ SECURE FAN COIL TO STRUCTURE
I UNIT AWAY FROM WALL
PIPE STRAP
_ _] (TYPICAL BOTH SIDES)
_ OR
\ UNIT AGAINST WALL
1/8" INCH THICK
ANGLE MOUNTING
BRACKET
(TYPICAL BOTH SIDES)
1#7 DOWN FLOW
cEL--,!_ BASE KIT
// _SECURE UNITTO FLOOR
ANGLE BRACKET OR PIPE STRAP
# MAX
Connect supply-air duct over the outside of 3/4"flanges
provided on supply-air opening. Secure duct to flange
using proper fasteners for type of duct used, and seal
duct-to-unit joint.
Duct connections flanges are provided on unit air
discharge connection.
When using FVM units with 20kW, 24kW, and 30kW
electric heaters, maintain a 1" clearance from
combustible materials to discharge plenum and ductwork
for a distance of 36" from unit. Use accessory downflow
base to maintain proper clearance on downflow
installations.
Use flexible connectors between duct work and unit to
prevent transmission of vibration. When electric heater is
installed, use heat-resistant material for flexible
connector between duct work and unit at discharge
connection. Duct work passing through unconditioned
space must be insulated and covered with vapor barrier.
Duct work Acoustical Treatment
Metal duct systems that do not have a 90 degree elbow
and 10 feet of main duct before first branch takeoff may
require internal acoustical insulation lining. As an
alternative, fibrous duct work 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 duct work shall comply
with National Fire Protection Association as tested by UL
Standard 181 for Class 1 air ducts.
496 01 5001 03 7
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.
NOTE: Before proceeding with electrical connections,
make certain that supply voltage, frequency, phase, and
circuit 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.
ELECTRICAL SHOCK or UNIT DAMAGE HAZARD
Failure to follow this warning could result in per-
sonal injury or death.
Turn off the main (remote) disconnect device be-
fore working on incoming (field) wiring.
Incoming (field) wires on the line side of the dis-
connect found in the fan coil unit remain live, even
when the pull-out is removed. Service and main-
tenance to incoming (field) wiring cannot be per-
formed until the main disconnect switch (remote
to the unit) is turned off.
ELECTRICAL SHOCK or UNIT DAMAGE HAZARD
Failure to follow this warning could result in per-
sonal injury, death, and/or unit damage.
If a disconnect switch is to be mounted on unit, se-
lect a location where drill and fasteners will not
contact electrical or refrigeration components.
A. LINE VOLTAGE CONNECTIONS
If unit contains an electric heater, remove and discard
power plug from fan coil and connect male plug from
heater to female plug from unit wiring harness. (Refer to
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.
B. 24V CONTROL SYSTEM
Control System Connections to Fan Control Board
Refer to unit wiring instructions for recommended wiring
procedures. Use 18 AWG color-coded, insulated (35 ° C
minimum) wires to make the low-voltage connections
between the thermostat, the unit, and the outdoor
equipment. If the thermostat is located more than 100 feet
from the unit (as measured along the low voltage wire),
use 16 AWG color-coded, insulated (35 °C minimum)
wire. Fan Control Board is circuited for single-stage
heater operation. When additional heater staging is
desired using outdoor thermostats of Heat Staging,
remove Jumper J2 on Fan Control Board to enable
staging.
All wiring must be NEC Class 1 and must be separated
from incoming power leads. Refer to outdoor unit wiring
instructions for additional wiring recommendations.
Connect low-voltage leads to thermostat and outdoor
unit (refer to Figure 9, Figure 10, Figure 11, Figure 12).
C. HEAT STAGING
Heat Staging Option
Heat Staging of the electric heat package is possible
when the FVM is installed as a part of a single-stage heat
pump system using a two-stage programmable
thermostat, or capable zoning control and and one (1) of
the following electric heat packages:
Relay heaters EHK10AKN, EHK10AKB, EHK15AK(F,B),
EHK18AHN, EHK20AK(F,B) EHK25AHCF, or
EHK30AHCF.
Complete system low-voltage wiring as shown in
Figure 9, Figure 10, Figure 11, Figure 12.
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 1 and
must be separated from incoming power leads.
A factory-authorized disconnect kit is available for
installation of 5 kW through 10 kW applications. When
electric heat package with circuit breakers are installed,
the circuit breaker can be used as a disconnect.
D. 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 oF. except for a heat
pump defrost cycle. In some applications, an outdoor
thermostat may be required. Refer to thermostat
instructions for details.
8 496 01 5001 03
FVMFanCoilWiring with
Figure 9 single-stage Air Conditioner
INDOOR CONTROL FAN COIL
HEAT STAGE 2 _ .....
NIA
HEAT STAGE I F_ .....
COOL STAGE I _ ....
FAN
24 VAC HOT _ ....
DEHUMIDIFY _ ....
24VAC COMM _ ..... __
HUMIDIFY
N/A
OUTDOOR E_-
l-_q
Fq
6_
....
Fa
REMOVE J2 JUMPER
FOR HEAT STAGING
--AD
HUMIDIF--T_ _
(24 VAC) /
--7_--I OUTDOOR 1-_
"-- SENSOR
FVM Fan Coil wiring with
Figure 10 two-stage Air Conditioning
INDOOR CONTROL FAN COIL
HEAT STAGE 2 _ .....
HEAT STAGE I _ .....
COOL STAGE I _ ....
COOL STAGE 2 _ ....
FAN _ ....
24 VAC HOT _ ....
DEHUMIDIFY [_ .....
24 VAC COMM _'_ ..... __
HUMIDIFY F_-
N/A
OUTDOOR
-I-_-- I.
42_
42]
--83 ....
@]
4_
Fq
43
I I
REMOVE J2 JUMPER
_r" FOR HEAT STAGING
,_.__ HUMIDIFIER _
/(24 VAC) /
___ OUTDOOR t-_
-- SENSOR
Figure 11 FVM Fan Coil Wiring with
single-stage Heat Pump
INDOORCONTROL FAN COIL
RVS COOLING
HEAT STAGE 3
HEAT STAGE 2
HEAT/COOL
STAGE 1
FAN
24 VAC HOT
DEHUMIDIFY
24 VAC COMM E_ ..... __
HUMIDIFY I-_-I_
RVS HEATING
OUTDOOR _-
I-_-I-
..... -I_
[2@]-.... -I_
.... r_] ---
I-q ..... -[]
I-q ..... -[] ....
[]
..... G
.._ ,ram
REMOVE J2 JUMPER
FOR HEAT STAGING
._-___
.___ HUMIDIFIER _
/(24 VAC) /
__ OUTDOOR t___
"-- SENSOR
Figure 12 FVM Fan Coil wiring with
two-stage Heat Pump
INDOORCONTROL FAN COIL
RVSCOOLING
HEAT/COOL D
STAGE1
HEAT STAGE3 _ ....
HEAT/COOL_
STAGE2
FAN
24VAC HOTEl-
DEHUMIDIFY | .....
24 VAC COMM E_ ..... __
HUMIDIFY
RVS HEATING
OUTDOOR _-
-q
£:
----I L.
-----Es....
----D ....
_, REMO_
E_ q_JUMPER FOR--HEAT STAGING
43....sL[ZI
4Z_
....q-D
(24 VAC) /
__ OUTDOOR I--_
-- SENSOR
496 01 5001 03 9
Figure13 J TransformerConnections
BROWN
RED
YELLOW
BLACK
PRIMARY
E. TRANSFORMER INFORMATION
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 (refer to Figure 13).
The secondary circuit of transformer is protected by a 5
amp fuse mounted on Fan Control Board.
R 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. Use or dual
or multiple supply circuits will require grounding of each
circuit to ground lugs provided on unit and heaters.
ELECTRICAL SHOCK HAZARD
Failure to establish uninterrupted or unbroken
ground could result in personal injury and/or
death.
According to NEC, ANSI/NFPA 70, and local
codes, the cabinet must have an uninterrupted or
unbroken ground in order to minimize potential
for personal injury or death if an electrical fault
should occur. The ground may consist of electri-
cal wire or metal conduit when installed in accor-
dance with existing electrical codes. If conduit
connection uses reducing washers, a separate
ground wire must be used.
REFRIGERANT TUBING
Use accessory tubing package or field-supplied tubing of
refrigerant grade. Insulate entire suction tube if
field-supplied tubing is used. Tubing package has an
insulated suction. 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 valve.
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.
Braze with SiI-Fos or Phos-copper alloy on cop-
per-to-copper joints and wrap a wet cloth around
rear of fitting to prevent damage to TXV.
Size and install refrigerant lines according to information
provided with outdoor unit. Route refrigerant lines to the
fan coil in a manner that will not obstruct service access to
the unit or removal of the filter.
,
2.
3.
4.
5.
6.
,
Cut tubing to correct length.
Hold coil stubs steady to avoid bending or
distorting.
Fit refrigerant lines into coil stubs. Insert tube into
sweat connection on unit until it bottoms.
Wrap TXV and nearby tubing with a heat-sinking
material such as a wet cloth.
Wrap a heat sinking material such as a wet cloth
behind braze joints.
Braze connection using a silver bearing or
non-silver brazing materials (SiI-Fos or
Phos-copper alloy). Do not use solder (matrices
which melt below 800°F). Consult local code
requirements.
After brazing, allow joints to cool. Evacuate coil and
tubing system to 500 microns using deep vacuum
method.
REFRIGERANT METERING DEVICE
FVM fan coils have a factory installed hard shut-off TXV
designed only for use with R-22 and R-410A
refrigerants. Use only with outdoor units designed for
corresponding refrigerants.
TXV is factory set and not field adjustable.
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.
This Fan Coil has a hard shut-off TXV metering de-
vice. A compressor Hard Start Kit is REQUIRED in
all applications where the matching outdoor unit
has a single-phase reciprocating compressor.
10 496 01 5001 03
CONDENSATE DRAINS
Units are provided with primary and secondary 3/4"NPT
drain connections. Refer to Figure 2 though Figure 7 to
identify the primary and secondary locations. To prevent
property damage and achieve optimum drainage
performance, BOTH primary and secondary drain lines
should be installed and include properly sized
condensate traps (refer to Figure 14). Factory approved
condensate traps are available (accessory part number
EBAC01CTK).
To connect drain lines, the drain connection knock-outs
must be removed. Use a knife to start the opening near
the tab and using pliers, pull the tab to remove the
knock-out. Clean the edge of the opening if necessary.
After drain fittings are installed, caulk the seam between
the fitting and the cover to retain the low leak rating of the
unit.
It is recommended the PVC fittings be used on the plastic
condensate pan. Do not over-tighten. Finger-tighten
plus 11/2turns. Use pipe dope, to ensure proper seal.
Install traps in the condensate lines as close to the coil as
possible (refer to Figure 16), but avoid blocking filter
access panel.
Install drain lines below the bottom of the drain pan and
pitch the drain lines down from the coil at least ¼ inch per
foot of run. Horizontal runs over 15 feet long must also
have an anti-siphon air vents (stand pipes), installed
ahead of the horizontal runs. Extremely long horizontal
runs may require oversized drain lines to eliminate air
trapping.
Route primary drain line to the outside or to a floor drain.
Check local codes before connecting to a waste (sewer)
line.
Route the secondary drain line to a place in compliance
with local installation codes where it will be noticed when
unit is operational. Condensate flowing from secondary
(overflow) drain indicates a plugged primary drain - unit
requires service or water damage will occur.
Prime all traps, test for leaks, and insulate drain lines
where sweating could cause water damage. Consult local
codes for additional requirements or precautions.
If a gravity drain cannot be used, install a condensate
pump. Install the pump as close to the indoor section as
possible.
PRODUCT or PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product
or property damage.
Use only full size P-traps in the condensate line
(refer to Figure 14). Shallow, running traps are in-
adequate and DO NOT allow proper condensate
drainage (refer to Figure 15).
Figure 14 J Recommended Condensate Trap
2" MIN
Figure 15 J Insufficient Condensate Trap
DO NOT USE SHALLOW RUNNING TRAPS!
Figure 16 J Condensate Drain
! o
T
o o o
FILTER
ACCESS
PAN EL
WITH
TRAP REQUIRED
___(USE FACTORY KIT OR
\FIELD-SUPPLIED TRAP)
PRIMARY TRAP REQUIRED (USE FACTORY KIT OR
FIELD-SUPPLIED TRAP OF PROPER DEPTH.
STANDARD P-TRAPS ARE NOT SUFFICIENT. SEE
FIGURE OF RECOMMENDED CONDENSATE TRAP)
496 01 5001 03 11
BLOWER MOTOR - CFM
FAN CONTROL BOARD CONFIGURATION TAPS
Fan Control Board 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 (Refer to Table 2 and Table 3). 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. (Refer to Figure 17 and
Figure 18).
FVM fan coils 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.
Figure 17 IFan Control Board
i
LOW VOLTAGE TERMINAL BLOCK
FAN CONTROL BOARD
A J
B.__,,._
c--_
D.__,,_
SECt SEC2
(Z_ (Z)
AUX HEAT KW/CFM
A B C D
v-q AC/HP SIZE
A B c D
• SYSTEM TYPE
AiJ HPC_M ...... _FF
AC/HP CFM ADJUST
• ON/OFF DELAY I_
?
I
" " " " AUX2 HUM2
ZMOLEX12 PIN CONNECTOR
A. AUXILIARY HEAT KW/CFM
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. (Refer to Figure 17,
A)
The select pins are marked A, B, C, D. Heater kW ranges
corresponding to each letter are listed in a chart on the
unit wiring diagram. Refer to the unit wiring diagram and
select the pin for the heater size being used (example
wiring diagram in Figure 21).
The airflow must be greater than the minimum CFM for
electric heater application with the size system installed
for safe and continuous operation. (Refer to Table 4 and
Table 5 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. (Refer to Figure 17, A as
indicated)
Fan Control Board
Figure 18 Wiring Arrangement
AUX HEAT KW/CFM
-:!S=!,o
B. AC/HP SIZE
Select System Size Installed
The factory setting for air conditioner or heat pump size is
the largest outdoor 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. (Refer to Figure 17, B)
The select pins are marked A, B, C, D. Outdoor unit sizes
corresponding to each letter are listed in a chart on the
unit wiring diagram. Refer to the unit wiring diagram and
select the pin for the outdoor unit size being used
(example wiring diagram in Figure 21).
12 496 01 5001 03
C.SYSTEMTYPE
SelectSystemType Installed AC or HP
The type of system must be selected:
1. AC - Air Conditioner provides approximately 350
CFM per ton for greater efficiency and humidity
control with the AC/HP CFM ADJUST set to the
nominal (NOM) tap. (To achieve approximately 400
CFM per ton move tap to (HI) position. Refer to
appropriate airflow tables for exact CFM setting.)
2. HP-COMFORT - Heat Pump Comfort Provides
approximately 315 CFM per ton for higher than
normal heating air delivery temperature. Provides
approximately 350 CFM per ton cooling airflow for
good humidity removal with the AC/HP CFM
ADJUST set to the nominal (NOM) tap.
3. HP-EFF - Heat Pump Efficiency provides same
airflow for heating and cooling modes to increase
overall HP efficiency; approximately 350 CFM per
ton with the AC/HP CFM ADJUST set to the
nominal (NOM) tap.
The factory setting is AC (Refer to Figure 17, C).
D. 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. (Refer to
Figure 17, D as indicated.)
E. 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 one (1) minute off delay and zero (0) on delay
programmed into the ECM motor that cannot be
overridden.
Four (4) motor operation delay profiles are provided to
customize and enhance system operation. (Refer to
Figure 17, E as indicated.)
Selection options are:
1. 0/90: No on delay and 90 second off delay at 100%
airflow (factory setting).
2. 30/90:30 second on delay with no airflow and 90
second off delay at 100% airflow profile. Used when
it is desirable to allow system coils time to
heat-up/cool-down in conjunction with the airflow.
3. 0/0: No delay option. Used for servicing unit or when
a thermostat is utilized to perform delay functions.
4. ENH: enhanced selection, provides a 30 second on
delay with no airflow followed by 150 seconds at
70% airflow, and no off delay for added comfort.
This profile will minimize cold blow in heat pump
operation and could enhance system efficiency.
F. CONTINUOUS FAN
Select desired fan speed when thermostat is set on
continuous fan
NOTE: If installed with a two-stage outdoor unit, do not
select HI speed continuous fan. If HI is selected, low
stage compression will also run HI fan 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 to HI, 100% cooling
mode airflow. (Refer to Figure 17, F as indicated.)
G. 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 SEC2 and the R circuit. The C circuit of the
transformer is referenced to chassis ground through a
printed circuit run at SEC1 connected to metal standoff
marked with ground symbol.
H. BASIC FAN COIL CONFIGURATION
The following basic configuration of the fan coil will
provide ARI rated performance of an air conditioner:
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 AC
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.
The following basic configuration of the fan coil will
provide ARI rated performance of a 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.
496 01 5001 03 13
ACCESSORIES
A. ACCESSORY ELECTRIC HEATERS
Electric heaters may be installed with the FVM fan coil per
instructions supplied with electric heater package. See
unit rating plate for factory-approved electric heater kits.
B. AUXILIARY TERMINALS
The AUX2 and HUM2 terminals on the Fan Control Board
are tied directly to the G terminal, and provide a 24 VAC
signal whenever the G terminal is energized. (Refer to
Figure 17 and Figure 18)
C. HUMIDIFIER /HUMIDISTAT CONNECTIONS
Fan Control Board terminals HUM1 (directly connected
internally to C on terminal block) and HUM2 (directly
connected internally to G on terminal block) are provided
for direct connections to the low-voltage control of a
humidifier through a standard humidistat (refer to
Figure 19). These terminals are energized with 24 VAC
when G thermostat signal is present (refer to Figure 22).
Alternately, the 24VAC signal may be sourced from the
W1 and C terminal block connections when electric
heaters are used as a primary heating source (refer to
Figure 20). When using a thermostat with humidity
control, the 24VAC signal may be sourced directly from
humidity terminal on the thermostat. (Refer to Figure 9,
Figure 10, Figure 11, or Figure 12.)
Figure 19 1
HUM 1
(C) 24-VAC
HUM 2
(G)
Humidifier Wiring
HUMIDISTAT
ITO HUMIDIFIER
Humidifier Wiring for Electric Heat
Figure 20 Primary Heating Source
(TERMINALBOARD HUM IDISTAT
CONNECTIONS)
cI
24-VAC
W
TO HUMIDIFIER
D. DEHUMIDIFY CAPABILITY WITH STANDARD
HUMIDISTAT CONNECTION
Latent capacities for systems using the FVM fan coil are
better than average systems. If increased latent capacity
is an application requirement, the field wiring terminal
block provides a connection terminal (H) for use of a
standard humidy sensor/control. The FVM will detect the
humidy sensor/control contact closing 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 humidity sensor/control to open its
contacts.
When the contacts open, the airflow will return to 100% of
the selected cooling airflow.
14 496 01 5001 03
SEQUENCE OF OPERATION
FVM fan coils will supply airflow in a range which is more
than twice the range of a standard fan coil. Each fan coil
size is designed to provide nominal cooling capacities at
50 oF evaporator temperature and the required airflow in
order to match with any of four (4) different air conditioner
or heat pump outdoor unit sizes. Table 1 outline the CFM
range for the different FVM fan coils.
The blower motor is a true variable speed motor designed
to deliver constant CFM. Constant CFM is valid for
systems with total external static pressure between 0.1
and 0.7 inches water column.
A. CONTINUOUS FAN
• Thermostat closes circuit R to G.
• Blower runs at continuous fan airflow.
B. COOLING MODE -SINGLE STAGE
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.
NOTE: For single stage systems, do not use the Y1
terminal.
• Fan coil delivers single stage cooling airflow.
C. COOLING MODE - TWO STAGE
• First stage (low) cooling: Thermostat closes circuits
to R to G, R to O, and R to Y1.
• Fan coil delivers low stage cooling airflow.
• Second stage (high) cooling: Thermostat closes
circuits to R to G, R to O, R to Y1 and R to Y/Y2.
• Fan coil delivers high stage cooling airflow
DCOOLING 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 Y/Y2 and R to
O and humidistat closes R to H.
• The fan coil delivers airflow which is approximately
80% of the nominal cooling airflow to increase the
latent capacity of the system.
E. ELECTRIC HEAT HEATING MODE
• Thermostat closes circuit R to W/W1, or W2
• Fan coil delivers the selected electric heat airflow.
F. HEAT PUMP HEATING MODE -SINGLE STAGE
• Thermostat closes circuits R to G and R to Y/Y2.
NOTE: For single stage systems, do not use the Y1
terminal.
• Fan coil delivers single stage heat pump heating
airflow.
G. HEAT PUMP HEATING MODE -TWO STAGE
• First stage (low) heating: Thermostat closes circuits
R to G and R to Y1.
• Fan coil delivers low stage heating airflow.
• Second stage (high) heating: Thermostat closes R
to G, R to Y1 and R to Y/Y2.
• Fan coil delivers high stage heating airflow.
H. 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).
If the thermostat calls for electric heat when the heat
pump is operating in heating or defrost, the motor will
modify the airflow if necessary. The motor will provide an
airflow which is safe for the operation of the electric heat.
That airflow is the greater of the heat pump heating airflow
and the electric heat only airflow.
ELECTRICAL SHOCK or UNIT DAMAGE HAZARD
Failure to carefully read and follow this CAUTION
warning could result in equipment malfunction,
property damage, personal injury and/or death.
Disconnect power to unit before removing or re-
placing connectors or servicing motor. Wait at
least five (5) minutes after disconnecting power
before opening motor.
496 01 5001 03 15
Figure21 J Wiring Diagram
i
i
i
L-'
PLUG 2
RECP 2
THIS COMPARTMENT MUST BE
CLOSED EXCEPT FOR SERVICING
IBLOWER MOTOR 1
( COOLINGONLYSCHEMATIC DIAGRAM )
FIELD POWER WIRING
SEE RATING PLATE
FOR VOLTS & HERTZ
r_ SEE NOTE #1
_O]GNU
KW
t 230V
t
tYEL
\
-i
DISCONNECT PER NEC
i t
i ,_ j
L2,
1
i
i
i
i
i
i
AIRFLOW ADJUST TABLE
UNIT SIZE AUX HEAT RANGE (KW/CFM)
VlO A B C D
2400 0-20/1100 0-15/875 0-10/675 0-5/625
3600 0-20/1225 0-15/1100 0-10/875 0-51800
4800 0-30/1500 0-20/1250 0-1511100 0-10/975
6000 0-30/1750 0-20/1525 0-1511350 0-1011100
3 2 61 4 _
/
3 2 61 4
BRN
mJ i
PCB
SEC2 SEE NOTE 8
AUX HEATKW/CFM
AC!HP SIZE
B C D
O O O
SYSTEM TYPE
HP-COMFORT
O
AC/HP CFM ADJUST
LO HI
O O
ON/OFF DELAY
RECP 3
RECP 4
AC/HP SIZE
BLU A B C
2400 36 30 24
3600 42 36 30
4800 48 42 36
6000 60 48 42
LEGEND
" " " FIELD POWERWIRING GND
-,MARKED TERMINAL ECM
-. PLUG AND RECEPTACLE PCB
COM COMMON RECP
F1 LOW VOLTAGE FUSE
t-
GRY
D
18
24
30
36
EQUIPMENT GROUND
FAN MOTOR
PRINTED CIRCUIT BOARD
RECEPTACLE
TRAN TRANSFORMER
1COMPONENT ARRANGEMENT
r
SEC1 SEC2
@ @
O O O O
O O O O
O O O
O O O
O O O O
E")
m]_
R
W 1
A/2
WY2
G
O
C
IOlOlOlOlOlOlOlOlOlOlOlOl
PL1 HEATER/MOTOR =
)i
i
i
i
i
ij_
i
r- i
2":"['"] REDt'_ _ Ii <: :'COM ,
; I ECM I - ," ",230 V '
i
1. Use copperwire (75%min) only between DisconnectSwitch
and unit.
2. To be wired inaccordancewith N.E.C.and bcal codes.
3. Transformerprimaryleads,blue208v, red 230v.
4. If anyofflqe originalwire, as supplied,mustbe replaced,
uselhe same or equivalenttype wire.
5. Replacelow voltagefusewith nogreaterthan 5 amp fuse.
6. Use 60 amp dass K fuses only,for replacement.
7. ConnectR to R,G to G, etc.,see outdoorinstructionfor
details.
8. Use tableto selectproperairflowfor aux heat size and
AC/HP size. 332385-101 REV. B
16 496 01 5001 03
FAN COIL AIRFLOW
CFM Range
Use with Outdoor Unit Size CFM Range
18, 24, 30, 36 350 - 1200
24, 30, 36, 42 415- 1400
30, 36, 42, 48 425- 1600
36, 42, 48, 60 540 - 2000
Fan Coil Airflow Delivery (CFM) in Cooling Mode (A/C or HP)
Table 1
Fan Coil Size
2400
3600
4800
6000
Table 2
Fan Outdoor
Coil Unit
Size Size
18
24
2400 30
36
24
30
3600 36
42
30
36
4800 42
48
36
42
6000 48
6O
NOTES:
Single Stage
Cooling
Nominal Dehum
525 420
700 560
875 700
1050 840
700 560
875 700
1050 840
1225 980
875 700
1050 840
1225 980
1400 1120
1050 840
1225 980
1400 1120
1750 1400
Two-Stage Cooling
High Low
Nominal Dehum Nominal Dehum
Two-Stage outdoor unit not offered
700 560 560 450
Two-Stage outdoor unit not offered
1050 840 840 670
700 560 560 450
Two-Stage outdoor unit not offered
1050 840 840 670
Two-Stage outdoor unit not offered
Two-Stage outdoor unit not offered
1050 840 840 670
Two-Stage outdoor unit not offered
1400 1120 1120 900
1050 840 840 670
Two-Stage outdoor unit not offered
1400 1120 1120 900
1750 1400 1400 1120
Fan Only
Low Med Hi
350 420 525
350 560 700
440 700 875
525 840 1050
415 560 700
440 700 875
525 840 1050
615 980 1225
440 700 875
525 840 1050
615 980 1225
700 1120 1400
540 840 1050
615 980 1225
700 1120 1400
875 1400 1750
1. The above airflows result with the AC/HP CFM ADJUST select jumper set on NOM.
2. Airflow 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 valid for systems with total static pressure between 0.1 and 0.7 in wc.
496 01 5001 03 17
FanCoil Airflow Delivery (CFM) in Heat Pump Heating Mode Only
Table 3
Fan
Coil
Size Low Hi
350 475
350 630
2400 440 785
525 945
415 630
440 785
3600 525 945
615 1100
440 785
525 945
4800 615 1100
700 1260
540 945
615 1100
6000 700 1260
875 1575
Outdoor
Unit
Size
18
24
3O
36
24
3O
36
42
3O
36
42
48
36
42
48
6O
Single Stage HP
Heating
Comfort Eft
475 525
630 700
785 875
945 1050
630 700
785 875
945 1050
1100 1225
785 875
945 1050
1100 1225
1260 1400
945 1050
1100 1225
1260 1400
1575 1750
Two-Stage HP Heating
High Low
Comfort Eft Comfort Eft
Two-Stage outdoor unit not offered
630 700 505 560
Two-Stage outdoor unit not offered
945 1050 755 840
630 700 505 560
Two-Stage outdoor unit not offered
945 1050 755 840
Two-Stage outdoor unit not offered
Two-Stage outdoor unit not offered
945 1050 755 840
Two-Stage outdoor unit not offered
1260 1400 1010 1120
945 1050 755 840
Two-Stage outdoor unit not offered
1260 1400 1010 1120
1575 1750 1260 1400
Fan Only
Med
38O
5O5
63O
755
5O5
63O
755
88O
63O
755
88O
1010
755
88O
1010
1260
NOTES:
1. The above
2. Airflow can
3. Dry coil at 230 volts and with 10kW heater and filter installed.
4. Airflows shown are valid for systems with total static pressure between 0.1 and 0.7 in wc.
Table 4
FVM
Model
Size
airflows result with the AC/HP CFM ADJUST select jumper set on NOM.
be adjusted +15% or -10% by selecting Hi or Lo respectively for all modes except fan only.
0-5
LO NOM HI
Airflow Delivery (CFM)
Electric Heater kW Range
625 625 625
650 725 835
815 905 1040
980 1085 1250
675 725 835
815 905 1040
980 1085 1250
1140 1270 1460
0-10
975 975 1040
980 1085 1250
1140 1270 1460
1305 1450 1665
1100 1100 1250
1140 1270 1460
1305 1450 1665
1630 1810 2085
0-10
LO NOM HI
675 675
835
1040
1250
675
725
9O5
1085
875
9O5
1085
1270
0-15
1100
1100
1270
1450
1350
1350
1450
1810
0-15
LO NOM HI
Outdoor
Unit
Capacity
(BTUH)
18
24
30
36
24
30
36
42
0 - 20
LO NOM HI
1100 1100 1100
1100 1100 1250
1225 1225 1250
1225 1270 1460
0 - 30
1500
1750
1810
875 875 875
2400 *900 900 1040
980 980 1085 1250
875 * * *
875 1040 1100 1100 1100
3600 980 1250 1100 1100 1250
1140 1460 1140 1270 1460
0 - 20
30 1100 1100 .....
36 1100 1250 1250 1250 1250 * *
4800 42 1140 1460 1250 1270 1460 * *
48 1305 1665 1305 1450 1665 1500 1665
36 1350 1350 .....
42 1350 1460 1525 1525 1525 * *
6000 48 1350 1665 1525 1525 1665 1750 1750
60 1630 2085 1630 1810 2085 1750 2085
Airflow not recommended for heater/system size
NOTE: LO, NOM, and HI refer to AC/HP CFM ADJUST selection on the control board.
18 496 01 5001 03
Table5
FVM
ModelSize
HeatPumpMinimumCFMfor Electric Heater Application
Heater Size kW
5 8, 9, 10 15 18, 20
625 625 ....
650 725 875 --
2400 800 875 875 1040
970 970 970 1040
675 875 ....
800 875 1100 1150
3600 975 975 1100 1225
1125 1125 1125 1225
800 875 875 1150
975 975 1100 1225
4800 1125 1125 1125 1225
1305 1305 1305 1305
1100 1100 1350 1350
1125 1125 1350 1350
6000 1300 1300 1350 1465
1625 1625 1625 1750
A/C Minimum CFM when using Electric Heat (CFM)
Heater Size kW
Outdoor
Unit Size
18
24
3O
36
24
3O
36
42
3O
36
42
48
36
42
48
6O
FVM
Model Size
Heater Only
5
625
675
675
1050
2400
3600
4800
6000
24,30
1400
1750
1750
8,9,10
625
7OO
7OO
1050
15
725
85O
85O
1050
18,20
875
1050
1050
1050
24,30
1400
1750
NOTES:
1. Heater Only-Air conditioner with electric heater application.
2. These airflows are minimum acceptable airflows as UL listed. Actual airflow delivered will be per airflow delivery chart
for Electric Heating Modes.
ECM MOTOR AND CONTROL
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, Fan Control Board or entire motor. The control module is available as a replacement part.
TROUBLESHOOTING ECM MOTOR AND CONTROLS
A. IF MOTOR TURNS SLOWLY: 4.
1. Replace access panel. Motor may appear to run
slowly if access panel is removed. 5.
It is normal operation to run noticeable slower if G
terminal is not energized in cooling or heat-pump
modes.
MOTOR DOES NOT RUN:
,
B. IF
Turn
1.
2.
,
off power and check the following:
Check 5 amp fuse on Fan Control Board.
Check for 24 VAC on SEC1 and SEC2. If no voltage
is present, check transformer.
Check all plugs and receptacles for any
deformation which could cause loose connections.
Be sure plugs are fully seated.
Verify that approximately 230 VAC is present at
motor.
Verify low-voltage control signals to motor. The
motor receives its control signals through the
12-pin plug (PL-1) on Fan Control Board and
16-pin plug on wiring harness. (Refer to
Troubleshooting Example.) The combinations of
pins energized will determine motor speed. (Refer
to Figure 22). Refer to Table 6 for circuit board,
low-voltage screw terminals energized and for
voltage present at each pin on 12-pin plug (PL-1).
Refer to Table 6 for pin number on 16-pin plug
which should have voltage when Fan Control Board
screw terminals have 24 VAC.
496 01 5001 03 19
Figure22 J CONTROLSIGNALS(FANCONTROLBOARD& 16-PinPLUG)
J2JUMPER PULL FOR
HEAT STAGING !
SEC1_ SEC2{[_) _J_ \[[ 1
__ AC,H.PS_ZE____-- _ Ilkh-H) l W2
_ _ _ _FF _ _Y/Y2
AC,_HpCFMADJUST II LH_4)I G
ONOFF DELAY
.............. \ oRY=_=o
\
PIN 12
(PL 1) PIN 1
-- LOW VOLTAGE SCREW TERMINALS
-- DEHUMIDIFICATION INPUT
-- 24 VAC HOT
-- AUXILARY HEAT STAGE 1
-- AUXILIARY HEAT STAGE 2
-- LOW STAGE COMPRESSOR
-- SINGLE OR HI STAGE COMPRESSOR
-- FAN
-- REVERSING VALVE
COMMON
? y v
Y1 16-PtN PLUG C W 1 C A03004
C. USE THE FOLLOWING PROCEDURE TO CHECK
CONTROL SIGNALS:
THERMOSTAT
1. Remove all thermostat wires from Fan Control
Board.
2. Jumper screw terminals (one at a time): R-G,
R-Y/Y2, R-Y1, R-W1. If motor runs in all cases,
thermostat is miswired, configured incorrectly or
defective. If motor runs in some cases, but not
others, continue to check wiring harness and circuit
board.
WIRING HARNESS
1. Shut off power to unit; wait five (5) minutes.
2. Remove 5-pin plug from motor.
3. Remove 16-pin from motor.
4. Replace 5-pin plug and turn power on.
5. Check for appropriate voltages on 16-pin
connector with screw terminals jumpered. (Refer to
Table 6 for values and refer to 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 FAN CONTROL BOARD
1. Unplug harness from board.
2. Check for appropriate voltages on pins with Fan
Control Board screw terminals jumpered. (Refer to
Table 6 for values and refer to example below.)
If proper signals are not present, replace Fan Control
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-stage heat pump.
1. After performing checks in Thermostat section,
follow Steps 1 through 5 in Wiring Harness section.
Then proceed with example.
2. With all thermostat wires removed from Fan Control
Board, place a jumper wire between R and Y/Y2
low-voltage screw terminals on the Fan Control
Board.
3. Check Table 6 for pin number on 16-pin connector
associated with the Y/Y2 signal. The correct pin is
#14. The far right column shows that (-) 12 VDC
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 (-) 12 VDC (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 Fan Control
Board.
These steps can be repeated for other modes of
operation.
20 496 01 5001 03
Table6 WiringConnectionsof FVMFanCoilWiringHarness
WIRINGHARNESSCONNECTION
16-1NPLUGONWIRINGHARNESSTOMOTOR TOFANCONTROLBOARD
Pinon Pinon 12-pin Signalon Pinwith
16-PinPlug Description plugor Set-up WireColor ScrewTerminal
Selection Jumperedto R*
1 Common Pin 9 on PL-1 Brown
2 W1 Aux Heat Stage 1 Pin 7 on PL-1 Violet 24VAC**
3 Common Pin 10 on PL-1 Orange
4 On/Off Delay On/Off Delay White
Selection Selection
AC/HP Size AC/HP Size
5 Blue
Selection Selection
6 Y1 Low Speed AC or HP Pin 3 on PL-1 Black (-) 12VDC**
AC/HP CFM AC/HP CFM
7 Black
Adjust Selection Adjust Selection
8 Not Used N/A Not Used
System Type System Type
9 Selection Selection Orange
0V (24VAC on no
10 Dehumidify Pin 12 on PL-1 Gray call)
Aux Heat Size Aux Heat Size
11 Violet
Selection Selection
12 24V AC Pin 8 on PL-1 Red 24VAC continuous
13 W2 Aux Heat Stage 2 Pin 4 on PL-1 White 24VAC**
Single Stage AC or
14 Y/Y2 HP, High Speed Pin 2 on PL-1 Yellow (-) 12DC**
Two-Stage AC or HP
15 G Fan Pin 1 on PL-1 Green 24VAC**
16 Not Used N/A Not Used
* Check voltages with 16-Pin Plug disconnected from motor.
** These signals will start motor. D. VERIFY MOTOR WINDING SECTION
To check Fan Control Board:
1. Leave jumper wire in place between R and Y/Y2.
2. Check Table 6 under"Wiring Harness Connection
to Fan Control Board" column and row for pin #14 to
see pin# on Fan Control 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 and Fan
Control Board and check for (-) 12 VDC
4. If voltage is present, the wiring harness is bad; if not,
the Fan Control Board is bad.
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.
496 01 5001 03 21
START-UP PROCEDURE
Refer to outdoor unit Installation Instructions for system
start-up instructions and refrigerant charging method
details.
CARE AND MAINTENANCE
For continuing high performance, and to minimize
possible equipment failure, it is essential that periodic
maintenance be performed on this equipment.
The system should be regularly inspected by a qualified
service technician. Consult the servicing dealer for
recommended frequency.
Between visits, the only consumer service recommended
or required is air filter maintenance and condensate drain
operation.
Air Filter
The only required maintenance that may be performed by
the consumer if filter maintenance.
Inspect air filters at least monthly and replace or clean as
required. Disposable type filters should be replaced.
Reusable type filters may be cleaned by soaking in mild
detergent and rinsing with cold water. Install filters with
the arrows on the side pointing in the direction of air flow.
Condensate Drain
During the cooling season check at least monthly for free
flow of drainage and clean if necessary.
An inspection port is provided on all A-coil delta plates.
Remove plastic plug to inspect.
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 autho-
rized filter kits must be used when locating the fil-
ter 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.
22 496 01 5001 03
R-410A QUICK REFERENCE GUIDE
° R-410A refrigerant operates at 50% - 70% higher pressures than R-22. Be sure that servicing equipment and
replacement components are designed to operate with R-410A.
° R-410A refrigerant cylinders are rose colored.
° Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
° R-410A systems should be charged with liquid refrigerant. Use a commercial type metering device in the
manifold hose.
° Manifold sets should be 750 psig high-side and 200 psig low-side with 520 psig low-side retard.
° Use hoses with 750 psig service pressure rating.
° Leak detectors should be designed to detect HFC refrigerant.
° R-410A, as with other HFC refrigerants, is only compatible with POE oils.
° POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
° POE oils may cause damage to certain plastics and roofing materials.
° Vacuum pumps will not remove moisture from oil.
° A liquid line filter-drier is required on every unit.
° Do not use liquid line filter-driers with rated working pressures less than 600 psig.
° Do not install a suction line filter-drier in liquid line.
° Wrap all filter-driers and service valves with wet cloth when brazing.
° Do not use with an R-22 TXV.
° If indoor unit is equipped with an R-22 TXV, it must be changed to an R-410A TXV.
° Do not use capillary tube indoor coils.
° Never open system to atmosphere while it is under a vacuum.
° When system must be opened for service, break vacuum with dry nitrogen and replace all filter-driers.
° Do not vent R-410A into the atmosphere.
° Observe all WARNINGS, CAUTIONS, NOTES, and bold text.
International Comfort Products, LLC
496 01 5001 03 Lewisburg, TN 37091 USA 23

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