This Single Piece Air Handler provides the flexibility for installation in any upflow or horizontal application. These versatile
models may be used for cooling or heat pump operati on with
or without electric heat. The direct-drive, 3-speed motors provide a selection of air volume to match any application.
BRAND LABEL (available from Distribution) apply to center
of the blower access panel.
The unit can be positioned for bottom return air in the upflow
position, and right or left return in the horizontal position.
Top and side power wiring and control wiring, accessible
screw terminals for control wiring, easy to install drain connections and electric heaters all combine to make the installation easy, and minimize installation cost.
INSPECTION
As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the exte nt of
the damage should be noted on the carrier's delive ry receipt.
A separate request for inspection by the carrier's agent
should be made in writing. See Local Distributor for more
information.
Also check to be sure all accessories such as heater kits or
suspension kits are available. Installation of these accessories or field conversion of the unit should be accomplishe d
before setting the unit in place or connecting any wiring, electric heat, ducts or piping.
REFERENCE
Use this instruction in conjunction with the instructions for the
appropriate indoor unit, air moving system and accessories.
Installer should pay particular attention to the words NOTE,
CAUTION and WARNING.
NOTES are intended to clarify or make the installation easier.
CAUTIONS identify procedures which, if not followed care-
fully, could result in personal injury, property damage or
equipment damage.
WARNINGS are given to alert the installer that severe personal injury, death or equipment damage may result if installation procedures are not followed properly.
LIMITATIONS
These units must be wired and installed in accordance with
all national and local safety codes.
Voltage limits are as follows:
Air HandlerVoltageNormal Operating
VoltageCodeVoltage Range
208/230-1-6006187-253
220/240-1-5093198-264
Entering Air Temperature Limits
Wet Bulb Temp. °FDry Bulb Temp. °F
MIN.MAX.MIN.MAX.
57726595
FIGURE 1 : Typical Application
UPFLOWHORIZONTAL
RIGHT HAND APPLICATION
LEFT HAND APPLICATION
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035-14520-001 Rev. B (0803)
LOCATION
Location is usually predetermined. Check with owner's or
dealer's installation plans. If location has not been decided,
consider the following in choosing a suitable location:
1.Select a location with adequate structural support, space
for service access, clearance for air return and supply
duct connections.
2.Use hanging brackets to wall mount unit as shown
below.
3.Normal operating sound levels may be objection able if
the air handler is placed directly over some rooms such
as bedrooms, study, etc.
4.Precautions should be taken to locate the unit and ductwork so that supply air does not short circuit to the return
air.
5.Select a location that will permit installation of a trapped
condensate line to an open drain.
6.When an evaporator coil is installed in an attic or above a
finished ceiling, an auxiliary drain pan should be provided under the coil as is specified by most local building
codes.
The coil is provided with a secondary drain. It should be
trapped and piped to a location that will give the occupant a visual warning that the primary drain is clogged. If
the secondary drain is not used it must be capped.
7.Proper electrical supply must be available.
8.Clearances must also be taken into consideration, and
provided for as follows:
a.Refrigerant piping and connections are located in
the front.
b.Maintenance and servicing through the front or
access side of unit with both sides and rear of unit
having zero inch clearance.
c.Condensate drain lines are connected in the front
(clear of filter).
d.Filter removal.
e.When no electric heat is used, the unit as well as all
duct work and plenum are designed for zero clear-
ance to combustible materials.
If Electric Heat is used, a minimum clearance of one
inch must be maintained on all sides of the supply
air duct and/or plenum continuously for up to 3 feet.
See Figure 2.
MINIMUM CLEARANCE
OF 1” ALL SIDES
FLEXIBLE
DUCT COLLAR
3’
FIGURE 2 : Plenum Clearances
POWER WIRING
TO MAIN
POWER SOURCE
REFRIGERANT
LINES
TO
CONDENSATE
DRAIN
SUPPLY
AIR
ELECTRIC HOT WATER HEATER
(Must comply with water heater installation instructions)
POWER WIRING
CONTROL
WIRING
THERMOSTAT
FILTER
ACCESS
LOUVERED
FIGURE 3 : Typical Installation
Unitary Products Group3
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035-14520-001 Rev. B (0803)
HORIZONTAL DRAIN PAN INST ALLATION /
CONVERSION
These air handler units are supplied ready to be installed in a
right hand horizontal position when a horizontal pan is factory
installed. If unit requires field installation of a horizontal pan or
requires left hand positioning, the unit must have the pan
installed in the correct position.
NOTE: Models bearing a “H” indicates the unit has horizontal
drain pan factory installed in position “A”. (See Figure 4).
1.Remove blower access, coil access, and center access
panels.
NOTE: Conversion must be made before brazing the refrigerant connections to the coil.
2.See Figure 4, remove two screws from horizontal drain
pan, to remove pan from position “A” if factory installed.
3.Position horizontal pan, as required in either “A” or “B”
position, locking it into the vertical drain pan as shown.
4.Horizontal drain pans have 4 plugged drains. Remove
plugs from connections being used.
NOTE: If this step is overlooked, it can lead to a water problem later.
5.Use removed plug to plug primary of upflow drain pan.
6.Attach horizontal pan with 2 screws removed in step no.
2 or supplied with the unit. Ensure that the drain pan is
lying flat against the insulati on of th e ca binet.
7.Horizontal drain cutout in the center access panel should
be removed by using a utility knife (if not previously cut
out).
DO NOT TRY TO KNOCK OUT.
8.Re-position and replace access panels.
Models F(2,3)FP045,048,060 have a coil baffle and
support bracket factory installed for right hand horizontal application (refer to Figure 4C). For left hand
applications the coil support bracket must be moved
to the right side of the coil, and the coil baffle must
be rotated to avoid water blow-off.
To rotate baffle, remove the coil assembly from the
unit (remove front two screws holding the coil support bracket and the two screws holding the drain
pan). Remove four screws in coil baffle and remove
the coil baffle and rotate ends.
Resecure the baffle and reinstall the coil assembly
ensuring that the rear of the drain pan is secured
under the back flange of the unit. Reinstall the coil
support bracket on the right side of the coil.
BLOWER
COMPARTMENT
(ACCESS PANEL
REMOVED)
PRIMARY
DRAIN
SECONDARY
DRAIN
HORIZONTAL
DRAIN PAN
POSITION "B”
VERTICAL
DRAIN PAN
SECONDARY
DRAIN UPFLOW
3/4" THREADED
DUCT WORK MAY BE FASTENED
CAUTIOUSLY WITH SCREWS TO
THE SIDES AND REAR OF UNIT
SHIPPING BRACKET*
REMOVE PRIOR TO
INSTALLATION (2 SCREWS)
J
DRAIN CONNECTIONS
FOR HORIZONTAL
APPLICATIONS
4
VAPOR
OPENING
LIQUID
OPENING
D
10-3/8
F
20-7/822-1/2
ALL DIMENSIONS ARE IN INCHES. THEY ARE SUBJECT TO CHANGE
WITHOUT NOTICE. CERTIFIED DIMENSIONS WILL BE PROVIDED
UPON REQUEST.
K
A
7/8 (1/2)
1-3/8 (1),
1-23/32 (1-1/4)
3/4
TOP VIEW (ALL MODELS)
=DRAIN PAN FOOTPRINT
MAX. FILTER LENGTH
(21 INCHES)
MAX. FILTER WIDTH
(B MINUS 1-1/2 INCHES)
3/4
REAR
F
4-1/8
10-3/8
7-1/2
3/4
Line Size
5/8
7/8
2
DRAIN CONNECTIONS
FOR UPFLOW APPLICATIONS
B
FILTER
ACCESS
FIGURE 5 : Dimensions & Duct Sizes
DUCT CONNECTORS
Use 1/2" screws to connect ductwork to bottom of
unit. Longer screws will pierce the drain pan and
cause leakage. If pilot holes are drilled, drill only
though field duct and unit bottom flange.
NOTE: The electric heat accessory should be installed before
the supply air duct is attached to the supply air openings.
Refer to the electric heater kit instructions for proper installation.
Air supply and return may be handled in one of several ways
best suited to the installation. See Figure 5 for dimensions for
duct inlet and outlet connections.
The vast majority of problems encountered with combination
heating and cooling systems can be linked to improperly
designed or installed duct systems. It is therefore highly
important to the success of an installation that the duct system be properly designed and installed.
C
E
18-3/8
BOTTOM VIEW
Use flexible duct collars to minimize the transmission of vibration/noise into the conditioned space. If electric heat is used,
non-flammable material must be used.
Where return air duct is short, or where sound may be a problem, sound absorbing glass fiber should be used inside the
duct. Insulation of duct work is a must where it runs through
an unheated space during the heating season or throug h an
uncooled space during the cooling season. The use of a
vapor barrier is recommended to prevent absorption of moisture from the surrounding air into the insulation.
The supply air duct should be properly sized by use of a transition to match unit opening. All ducts should be suspended
using flexible hangers and never fastened directly to the
structure. This unit is not designed for non-ducted (freeblow)
applications. Size outlet plenum or transition to discharge
opening sizes shown in Figure 5.
Duct work should be fabricated and installed in accordance
with local and/or national codes. This includes the standards
of the National Fire Protection Association for Installation of
Air-Conditioning and Ventilating Systems, NFPA No. 90B.
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035-14520-001 Rev. B (0803)
AIR FILTERS
Air filters must be field supplied. A 1" filter access rack has
been built into the unit. See Figure 4. Remove filter access
cover shown. Install proper size filter. Standard 1" size permanent or throw away filter may be used, or, permanent
washable filters are available using model numbers:
1PF0601, 602, 603BK. See Table 2 for filter size.
Equipment should never be operated without filters.
SUSPENSION KITS
A suspension kit is available. Models 1BH0601 (unit sizes
018-060) is designed specifically for the units contained in
this instruction (upflow application only). For installation of
these accessory kits, see the instructions packed with the kit.
For suspension of these units in horizontal applications, it is
recommended to use angle steel support brackets with
threaded rods, supporting the units from the bottom, at the
locations shown in Figure 6.
SUSPENSION SUPPORT LOCATIONS FOR HORIZONTALAPPLICATIONS*
The coil in this Air Handler unit will have a metering device
installed at the factory.
If the model number is of the following format:
F3RPxxxH06T or F3FPxxxH06T - The coil will have a Thermal Expansion Valve (TXV) installed. Please refer to the TXV
Metering Device section for installation notes.
If the model number is of the following model series:
F2RP / F2FP or F2RC / F2FC - The coil will have an orifice
installed in the distributor housing. Please refer to the Orifice
Metering Device section for selection & installation notes.
EXPANSION
BULB
EXPANSION
BULB
CLAMP
FIGURE 7 : TXV Bulb Installation
Please refer to Table 1 to verify which TXV is installed in this
Air Handler unit and that this AHU is a valid system match for
the AC or HP unit installed.
The TXV is fully brazed into the coil assembly of this Air Handler unit at the factory. The temperature sensing bulb will
need to be attached to the coil suction header line after the
line set is brazed to the coil.
• Make sure the TXV bulb is outside of the Air Handler
cabinet. Excess tubing should remain inside the cabinet.
• T ake caution not to apply high temperatures to the TXV
assembly or equalizer line while brazing.
• Attach field line sets and braze to coil connections.
Replace access panels & secure.
• Secure the TXV bulb to the suction line with the clamp
provided. Choose a horizontal location as close to the
cabinet as possible, but not directly on the brazed connection joint. Refer to Figure 7.
• The bulb should be in direct contact with the coil suction line along the length of the bulb.
6Unitary Products Group
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035-14520-001 Rev. B (0803)
• If the suction line is 3/4" diameter - position the bulb
near the top of the copper tube as shown. If the tube is
7/8" diameter - position the bulb near the bottom of the
tube. Refer to Figure 8.
• Wrap the clamp, bulb & line securely with insulation
provided.
BULB
FOR 3/4” O.D. OR SMALLER
FOR 7/8” O.D. OR LARGER
NOTE:
TXV BULB MUST BE INSULATED
PIPE
*
BULB
-45º
*
ROTATE BULB TO
KEEP TAILAT BOTTOM
45º
FIGURE 8 : Bulb Location
Orifice Metering Device
All non-TXV coils will have an orifice installed in the fitting
between the liquid line connection and distributor. See Figure
9. The factory installed orifice is identified on the unit data
plate. Also it is listed in Table 1.
The orifice that is shipped with the coil is based on the “most
sold” combination, but it may have to be changed, depending
on the capacity and efficiency of the outdoor unit, elevation
differences of the indoor and outdoor sections, and/or long
total line lengths. An additional orifice is shipped with the outdoor unit in the literature packet for most requirements. Other
sizes must be ordered from the parts department if required.
Orifice Installation
LIQUID LINE
SWIVEL COUPLING
(See Caution Below)
ORIFICE
DISTRIBUTOR
FIGURE 9 : Orifice Installation
A standard orifice is pre-installed in the unit and is marked on
the unit data plate. Refer to the outdoor unit instruction and
application data to determine the proper orifice required for
your particular system combination and piping conditions.
If the orifice sizes match, nothing further is required and the
refrigerant lines may be connected per the outdoor unit
instruction. However, if another orifice should be used,
change the orifice in the coil with the following procedure:
Coil is under 30 PSIG inert gas pressure. Relieve
pressure from schrader valve on liquid line side.
This fitting is a right-hand thread, turn counter-clockwise to remove.
1.Remove the liquid line fitting using 3/4" wrenches, and
remove the pre-installed orifice with a small diameter
wire or paper clip.
2.Remove the new orifice from the packet and verify that it
is the correct number required. Install this orifice with the
rounded end toward the coil and the flat end outward per
Figure 9.
3.Thread the liquid line fitting back in pla c e on the coil.
Tighten the fitting hand tight and turn an additional 1/8
turn to seal.
Use 3/4" wrenches to turn fittings. Using pliers will
cause internal damage to the fitting.
NOTE: This procedure should be done within 2 minutes to
keep air and contaminates from entering the coil. If the orifice
cannot be replaced and the coil resealed within 2 minu tes,
then it should be temporarily closed to air using masking tape
(short term delay) or plugging/ capping (long term delay).
There is no need to purge the coil if this procedure is done
within the time limit.
4.Mark the data plate with the orifice installed.
REFRIGERANT LINE CONNECTION
NOTE: Confirm the orifice size before connecting lines.
See the outdoor unit installation instructions for the procedure
to install field supplied tubing for systems with sweat fittings.
Stub adapters are available to adapt sweat connections to
quick connections.
Connect lines as follows:
NOTE: Route the refrigerant lines to the coil in a manner that
will not obstruct service access to the coil, air handling system or filter.
Unitary Products Group7
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035-14520-001 Rev. B (0803)
1.Suction line connections are made outside the center
access panel. Cut off the suction line as close to the end
as possible. Center access panel is recessed to assure
sufficient room for brazing or it can be removed and slid
over the suction line during brazing.
2.Braze the suction line. Re-attach the center access
panel, if it had been removed.
3.Cut the liquid line at the groove in the bell, removing the
schrader fitting.
4.Braze the liquid line.
5.Install supplied grommets on both the suction and liquid
lines to complete the air seal.
Lines should be sound isolated by using the appropriate
hangers or strapping.
When field supplied lines are used be sure to insulate the
suction line only.
ELECTRIC HEATERS & OPERATING CONTROLS
The low voltage transformer and the fan / heater control are
standard on all models. The air handlers are shipped
prewired to operate as cooling only applications. To complete
the installation for cooling only, install a 6-pin jumper plug to
the control board to bypass the heater limit controls. This
jumper plug can be found in the unit installation envelope or secured to the center of the heater duct cover
flange, near the transformer. Failure to install the plug will
cause the blower to run continuously. See Figure 12. Mark
the unit nameplate with the appropriate heater selection on
the space provided or NONE to indicate cooling only.
To operate these units with electric heat, it is necessary to
field install an electric heater kit (2HK). See Electric Heater
Accessory Installation instructions for proper installation procedure. Prior to installing electric heat, it is necessary to perform the following procedure:
1.Remove the 4-pin power plug from the control board.
See Figure 12.
NOTE: This pin must not be used when electric heaters are
installed.
2.Remove the five (5) screws from the duct cover and
remove the duct cover from the air handler.
CIRCUIT
BREAKERS
OFF
ON
LABEL
AIR FLOW
For units with heaters with circuit breakers in a horizontal
right application, a label must be applied to the unit to
describe the circuit breaker orientation. The label is included
on the installation instruction packet. See Figure 10.
LOW VOLTAGE CONTROL CONNECTION
The 24 volt power supply is provided by an internally wired
low voltage transformer which is standard on all models.
However, if the unit is connected to a 208 volt power supply
the low voltage transformer must be rewired to the 208 volt
tap. See the unit wiring label.
Field supplied low voltage wiring can exit the unit on the top
right hand corner or the right hand side panel (see Fig. 5,
item K).
Install a 7/8" plastic bushing in the selected hole and keep
low voltage wiring as short as possible inside the control box.
The field wiring is to be connected at the screw terminals of
the control board. Refer to Figures 14, 15 and 16.
NOTE: All wiring must comply with local and nationa l electrical code requirements. Read and heed all unit caution labels.
NOTE: It is possible to vary the amount of electric heat
turned on during the defrost cycle of a heat pump. Standard
wiring will only bring on 5 KW of electric heat during defrost
see Table 3 and Figures 14, 15 and 16 for alternate staging.
LINE POWER CONNECTIONS
Power may be brought into the unit through the supply air
end of the unit (top when unit is vertical) or the left side panel.
Use the hole appropriate to the unit's orientation in each
installation to bring conduit from the disconnect. The power
lead conduit should be terminated at the electrical control
box. Refer to Tables 6, 9 & 1 1 for wire requirements. Also see
Figure 11.
BLOWER SPEED CONNECTIONS
Except for F2FP/F3FP045(T), which has a 4-speed motor, all
air handlers contain three speed blower motors which are
prewired to the control board.
Adjust blower motor speed to provide airflow with in the minimum and maximum limits approved for evaporator coil, electric heat and outdoor unit. Speed tap adjustments are made
at the motor terminal block, See Figure 13. Airflow data is
shown in Tables 15, 16 and 17.
Higher efficiencies will be obtained if the indoor air volume is
as high as possible provided the CFM does not exceed limitations and the sound level is not objectionable.
Connect motor wires to motor speed tap receptacle for speed
desired. See wiring label for motor wiring details. See Figure
13.
The unit control is designed for the addition of a two speed
fan kit. See accessory for details.
AIR HANDLER
FIGURE 10 : Electric Heaters in Horizontal Configuration
NOTE: TO CHANGE HEAT QUANTITY
DURING DEFROST, REVERSE
CONNECTIONS AT W1 & W2.
C
O
FIGURE 15 : Heat Pump Wiring
THERMOSTAT
LorX
CorB
FIELD
INSTALLED
JUMPER
** TERMINAL NOT
AVAILABLE ON ALL
THERMOSTATS
HEAT PUMP
O
R
Y
G
W
**
T
E
**
FAN
COIL
R
Y
G
UNIT
W2
W1
C
O
OUTDOOR
UNIT
O
X
R
B
Y
W
66
60
53
NOTE: TO CHANGE HEAT QUANTITY
DURING DEFROST, REVERSE
CONNECTIONS AT W1 & W2.
FIGURE 16 : Heat Pump Wiring - Demand Defrost Only
18Unitary Products Group
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035-14520-001 Rev. B (0803)
DRAIN CONNECTIONS
All drain lines should be trapped a minimum of three inches,
should be pitched away from unit drain pan and should be no
smaller than the coil drain connection.
Threaded drain connection should be hand-tightened, plus no more than 1/16 turn.
Horizontal drain cutout in the center access panel
should be removed by using a utility knife. DO NOT
TRY TO KNOCK OUT.
Route the drain line so that it does not interfere with accessibility to the coil, air handling system or filter and will not be
exposed to freezing temperatures. See Figures 2, 3 and 4.
NOTE: When the coil is installed in an attic or above a finished ceiling, an auxiliary drain pan should be provided under
the coil as is specified by most local building codes.
Coils should be installed level or pitched slightly toward the
drain end. Suggested pitch should not exceed 1/4 inch per
foot of coil.
The coil is provided with a secondary drain that should be
trapped and piped to a location that will give the occupant a
visual warning that the primary drain is clogged. If the secondary drain is not used it must be capped.
The drain pan connections are designed to ASTM Standard D
2466 Schedule 40. Use 3/4" PVC or steel threaded pipe.
Since the drains are not subject to any pressure it is not necessary to use Schedule 40 pipe for drain lines.
It is recommended that all drain connections be sealed with
teflon tape or equivalent.
MAINTENANCE
Filters must be cleaned or replaced when they become dirty.
Inspect at least once per month. The frequency of cleaning
depends upon the hours of operation and the local atmospheric conditions. Clean filters keep unit efficiency high.
COIL CLEANING
If the coil needs to be cleaned or replaced, it should be
washed with Calgon coilclean (mix one part Coilclean to
seven parts water). Allow solution to remain on coil for 30
minutes before rinsing with clean water. Solution should not
be permitted to come in contact with painted surfaces.
LUBRICATION
The bearings of the blower motor are permanently lubricated.
CONDENSATE DRAINS
During the cooling season check the condensate drain lines
to be sure that condensate is flowing from the primary drain
but not from the secondary drain. If condensate ever flows
from the secondary drain the unit should be promptly shut off
and the condensate pan and drains cleaned to insure a free
flowing primary drain.
TROUBLESHOOTING GUIDE
PROBLEMPOSSIBLE CAUSE
1. No heat units do not have 6-pin connector installed.
2. Limit open or not connected.
Blower Runs all of the time
Blown Fuse1. Low voltage short to C or ground from R, Y, G, W, or O.
No 24V
No 2nd stage heat
No Heat or Limited Heating
3. Variable speed break-out tab broken out.
4. Blower OFF delay (approx. 1 min).
5. Thermostat fan switch in “ON” position.
1. 4-pin connector loose.
2. Loose wire from control to transformer (24V and 230V).
3. Blown fuse on control board.
1. Check 6-pin connector and connections to panel mount relays.
2. Verify that both W
1. Check filter.
2. Closed registers.
3. Restricted airflow (supply registers or return registers)
4. Check blower motor operation.
5. If the safety limit opens 4 times, the control will not permit the heating element to operate for 1 hour.