Unitary products group FEH180 User manual

CONTENTS
GENERAL ....................................3
RENEWALPARTS .............................3
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
INSTALLATION................................4
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words:
NOTE,CAUTION,andWARNING.Notesare intended to
clarify or make the installation easier. Cautions are given
to prevent equipment damage. Warnings are given to
alert installer that personal injury and/or equipment dam-
age may result if installation procedure is not handled
properly.
INSTALLATION
MANUAL
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
SPLIT-SYSTEM HEAT PUMPS
INDOOR UNITS
MODELS: FEH180 & 240 ONLY
035-16626-000-E-0103

035-16626-000-D-0502
2UnitaryProductsGroup
TABLE OF CONTENTS
GENERAL ......................................3
RENEWALPARTS ...............................3
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION..................................4
LIMITATIONS ...............................4
RIGGING ..................................4
LOCATION .................................4
CLEARANCES ..............................4
VERTICAL/HORIZONTALINSTALLATION ........8
DUCT CONNECTIONS ......................10
REFRIGERANTMAINS ......................11
INSTALLINGREFRIGERANTMAINS ...........11
DRAINCONNECTION .......................11
SUPPLYAIRBLOWERADJUSTMENT..........12
POWERANDCONTROLWIRING..............14
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
INDOORCOIL .............................17
FILTERS..................................17
DRAINPAN ...............................17
LUBRICATION .............................17
BELTS ...................................17
LIST OF FIGURES
Fig.# Pg.#
1 PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . . . 3
2 UNIT SUSPENSION MOUNTING FEH180
(HORIZONTAL APPLICATIONS) . . . . . . . . . . . . . . . . . 6
3 UNIT SUSPENSION MOUNTING FEH240
(HORIZONTAL APPLICATIONS) . . . . . . . . . . . . . . . . . 7
4 VERTICAL AND HORIZONTAL APPLICATIONS . . . . 8
5 ELECTRIC HEAT ACCESSORY . . . . . . . . . . . . . . . . . 9
6 RETURNAIRGRILLEFEH180 ..................9
7 RETURNAIRGRILLEFEH240 ..................9
8 BASE ACCESSORY FEH180 . . . . . . . . . . . . . . . . . . . 10
Fig.# Pg.#
9 BASE ACCESSORY FEH240 . . . . . . . . . . . . . . . . . . 10
10 SUPPLYAIRPLENUMFEH180 ................10
11 SUPPLY AIR PLENUM KNOCKOUTS FEH180 . . . . 10
12 SUPPLYAIRPLENUMFEH240 ................10
13 RECOMMENDEDDRAINPIPING...............12
14 TYPICAL MOTOR MOUNTING ASSEMBLY . . . . . . . 13
15 HOLE LOCATIONS FOR PRESSURE DROP
READINGS.................................13
16 CFMVSPRESSUREDROP ...................13
17 UNITDIMENSIONSFEH180...................18
18 UNITDIMENSIONSFEH240...................19
LIST OF TABLES
Tbl.# Pg.#
1 PHYSICALDATA .............................5
2 UNIT APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . 5
3 FEH180 UNIT SUSPENSION WEIGHTS (LBS) . . . . . . 6
4 FEH240 UNIT SUSPENSION WEIGHTS (LBS) . . . . . . 7
5 ELECTRIC HEATER DIMENSIONS FEH180 & 240 . . 9
6 SUPPLY AIR BLOWER MOTOR PULLEY
ADJUSTMENT ..............................12
7 SUPPLY AIR PREFORMANCE FEH180 . . . . . . . . . . 14
8 SUPPLY AIR PERFORMANCE FEH240 . . . . . . . . . . 14
9 ELECTRICAL RATINGS INDOOR UNIT - HEAT PUMP
ONLY .....................................15
10 ELECTRICAL RATINGS INDOOR UNIT - HEAT PUMP
WITHELECTRICHEAT .......................16
11 TYPICALFIELDWIRING ......................17
12 FEH180/240 MINIMUM CLEARANCES . . . . . . . . . . . 18

035-16626-000-E-0103
Unitary Products Group 3
GENERAL
Every unit includes a well-insulated cabinet, copper
tube/aluminum fin coil with interlaced circuiting
arrangement, 1" throwaway filters, centrifugal blower
with a fixed pitch sheave, and a blower motor with vari-
able pitch sheave. (FEH240 doesn’t ship with Motor &
Drive - field installation required).
They also include 2 filter driers, 2 expansion valves
and distributors that are only used during the cooling
cycle plus a check valve to provide the proper flow of
refrigerant through the unit during both the cooling and
heating cycles...
The controls include 208/230/460 volt transformer,
blower motor contactor and relay, and a low voltage
terminal block.
The units are shipped in the vertical position ready for
field installation. For horizontal installation, the blower
module can be repositioned in the field as shown on
Page 8 for maximum flexibility.
RENEWAL PARTS
Refer to the Source One Parts Manual for a complete
listing of replacement parts on this equipment.
All forms referenced in this instruction may be ordered
from:
Standard Register
2101 West Tecumseh Road
Norman, Oklahoma 73069
Toll Free Fax [phone]
This instruction covers the installation of the indoor
unit. For information on the installation and operation
of the matching outdoor unit, refer to PN 035-16192-
001.
Installer should pay particular attention to the words:
NOTE,CAUTION and WARNING. Notes are intended
to clarify or make the installation easier. Cautions are
given to prevent equipment damage. Warnings are
given to alert the installer that personal injury and/or
equipment damage may result if the installation proce-
dure is not handled properly.
INSPECTION
As soon as a unit is received, it should be inspected for
possible damage during transit. If damage is evident,
the extent of the damage should be noted on the car-
rier’s freight bill. A separate request for inspection by
the carrier’s agent should be made in writing.
Improper installation may create a condition
where the operation of the product could
cause personal injury or property damage.
This product must be installed in strict compli-
ance with the enclosed installation instruc-
tions and any applicable local, state, and
national codes including but not limited to,
building, electrical and mechanical codes.
FIGURE 1 - PRODUCT NOMENCLATURE
F 1 EH18 0 A 3 3
P R O D U C T C A T E G O R Y
F = S p l i t - S y s t e m H e a t P u m p
n d o o r U n i t
P R O D U C T D E N T F E R
E H = n d o o r U n i t
P R O D U C T G E N E R A T O N
1 = 1 s t G e n e r a t i o n N O M N A L C O O L N G
C A P A C T Y
1 8 0 = 1 5 T o n
2 4 0 = 2 0 T o n
F A C T O R Y N S T A L L E D H E A T
A = N o t A p p l i c a b l e
V O L T A G E C O D E
3 3 = 2 0 8 / 2 3 0 / 4 6 0 - 3 - 6 0

035-16626-000-E-0103
4UnitaryProductsGroup
INSTALLATION
LIMITATIONS
Theses units must be installed in accordance with all
national and local safety codes. If no local codes
apply, installation must conform with the appropriate
national code. Units are designed to meet National
Safety Code Standards. If components are to be
added to a unit to meet local codes, they are to be
installed at the dealer’s and/or the customer’s expense.
See Table 2 for application data.
RIGGING
Be careful when moving the unit. Do not remove any
packaging until the unit is near its final location.
The packaging consists of a bottom wooden skid that
can be lifted with a fork truck from any direction, a plas-
tic bag that covers the entire unit, and strapping that
secures the plastic bag to the bottom skid.
These units can be rigged with slings under the bottom
skid.
Before rigging any unit, determine its weight from Table
1.
LOCATION
These indoor units are not designed for outdoor instal-
lation. They must be located within the building struc-
ture, either inside or outside the conditioned space.
The units should be located as close to the outdoor
units as practical and positioned to minimize bends in
the refrigerant piping.
Units being installed vertically or horizontally can be set
directly on a floor or platform, or they can be supported
by metal or wooden beams.
Units being installed horizontally can be suspended
from above. Units being installed horizontally can be
suspended from above by using a field installed Hori-
zontal Suspension Kit PN# 1HH0451. Refer to Figures
2 and 3 for their location and the individual load on
each hanger rod.
CLEARANCES
The clearances listed on unit dimensions drawing
(Pages 18 and 19) are required for the proper service
and operation of the unit.
Spreader bars should be used to prevent
slings from crushing the unit panels and
frame.
Be careful when attaching the hanger rods.
Use a washer with a back-up nut on each rod
and tighten down against the cabinet so they
will not be allowed to turn or slip.

035-16626-000-E-0103
Unitary Products Group 5
TABLE 1: PHYSICAL DATA
DESCRIPTION UNIT MODEL
FEH180 FEH240
Coil
Rows Deep X Rows High 3X32 3X32
Finned Length - inches 54.5 83
Face Area - square feet 12.11 18.44
Tube (Copper) OD - inches 3/8 3/8
Fins (Aluminum) per inch 13 13
Centrifugal Blower (Forward Curve) - Qty Diameter X Width - inches 18 X 18 - 1 15 X 12 - 2
Blower Motor1HP 3 ---
RPM 1750 ---
Filters (Throwaway)
Quantity per unit 68
Size (in) 20 X 20 X 1 20 X 22 X 1
Total Face Area - square feet 16.7 24.1
Unit Weight (lbs) Shipping 425 830
Operating 435 720
Accessory Operating Weight (Lbs.)
Motor & Drive 3HP --- 90
5HP --- 120
Electric Heat
10 KW 63 ---
20 KW 66 126
30 KW 71 129
40 KW --- 132
50 KW 80 137
Supply Air Plenum 114 150
Return Air Grille 20 15
Base 100 120
1. Refer to “Blower Motor and Drive Data” table for more information.
TABLE 2: UNIT APPLICATION DATA
APPLICATION
LIMITATIONS MIN. MAX.
Voltage Variation (208/230-3-60)1187 253
Voltage Variation (460-3-60)1414 506
Ambient Air on Outdoor Coil (Cooling Cycle) - °F 45 115
Ambient Air on Indoor Coil (Cooling Cycle) - °F 68 86
Ambient Air on Outdoor Coil (Heating Cycle) - °F 0270
Ambient Air on Indoor Coil (Heating Cycle) - °F 60 80
1. Rated in accordance with ARI Standard 110, utilization range “A”.
2. Below 0ºF the control circuit will lock out the compressor and allow the electric heat accessory to cycle at its stand by capacity.

035-16626-000-E-0103
6UnitaryProductsGroup
(See Table 3 for Suspension Weights).
FIGURE 2 - UNIT SUSPENSION MOUNTING FEH180 (Horizontal Applications)
3
1-1/2 COIL
SECTION
BLOWER
SECTION
5"
A
D
SUSPENSION
CHANNEL
HANGER RODS
(FIELD SUPPLIED)
C
B
ELECTRIC HEATER
ACCESSORY (40 Lb.)
SUPPLY AIR PLENUM
ACCESSORY (100 Lb.
)
D
58-11/16"
55"
TABLE 3: FEH180 UNIT SUSPENSION WEIGHTS (LBS)
SUSP'N. POINT W/ 3 HP MOTOR W/ HEATER ACCESS W/ PLENUM ACCESS W/ HEATER & PLENUM
ACCESS
A95 95 85 85
B120 120 100 100
C95 115 165 185
D115 140 185 205
Total Wt. 425 470 535 575

035-16626-000-E-0103
Unitary Products Group 7
FIGURE 3 - UNIT SUSPENSION MOUNTING FEH240 (Horizontal Applications)
3
43-3/4"
EVAP. COIL
SECTION
BLOWER
SECTION
HEATING COIL
SUSPENSION
CHANNEL
43-3/4"
5" A
B
C
D
E
F
55"
HANGER RODS
(FIELD SUPPLIED)
ELECTRIC HEAT
ACCESS (40l s. each)
TABLE 4: FEH240 UNIT SUSPENSION WEIGHTS
(LBS)
SUSPENSION
POINT W/ 5HP
MOTOR1
1. Motor location at suspension point “F”.
W/ HEATER
ACCESS
A142 142
B132 132
C152 152
D162 189
E132 158
F127 154
Total Weight 847 927

035-16626-000-E-0103
8UnitaryProductsGroup
VERTICAL/HORIZONTAL INSTALLATION
These indoor units are shipped for vertical installation
with vertical air discharge as shown in Figure 4 on
page 8.
FIGURE 4 - VERTICAL AND HORIZONTAL APPLICATIONS
MODELS 180 & 240
This unit has two distinct modules
...ablowermoduleandacoil
module. Although the unit is
always shipped in the vertical
position with a vertical air dis-
charge as shown in (a), the
blower module can be reposi-
tioned in the field as shown in
illustrations (b) and (c) for maxi-
mum flexibility.
•TheSupply Air Plenum,Return Air Grille and Base
accessories can be applied on arrangement (a).
•TheReturn Air Grille and Base accessories can be
applied on arrangement (b).
•TheSupply Air Plenum,Return Air Grille and
Suspension accessories can be applied on
arrangement (c).
HORIZONTAL POSITION
VERTICAL POSITION

035-16626-000-E-0103
Unitary Products Group 9
FIGURE 5 - ELECTRIC HEAT ACCESSORY
HEATER
ELEMENT
CHAMBER
3/4
A
C
1DLE
F
M
G
H
K
B
ACCESS OPENING FOR POWER SUPPLY WIRING
1/2
W
IRING HARNESS LOCATION
T
his o ening in the bottom of the heater
control box is used for the wiring harness
t
hat connects the heater accessory to the
basic unit. It is rovided with a squeeze
connector for securing the wiring harness,
and its location corres onds to the loca-
t
ion of the 1-23/32 inch knockout in the to
anel of the basic unit.
CONTROL BOX
ACCESS PANEL
10KW THRU 30KW - Add a 1-1/4 inch conduit fitting
to the 1-23/32 inch hole for wire sizes u through
#1 AWG. Remove the knockout ring and add a
1-1/2 inch conduit fitting to the 1-31/32 inch hole
for wire sizes u through #0 AWG.
50 KW - Add a 1-1/4 inch conduit fitting to the
1-23/32 inch hole for wire sizes u through #1\
AWG. Remove the knockout ring and add a
two-inches conduit fitting to the 2-1/2" hole
for wire sizes u through #000 AWG.
Used on FEH180 only.
TABLE 5: ELECTRIC HEATER DIMENSIONS FEH180 & 240
Heater
Model1Nom.
kW
Heater Dimensions (inches)
ABCDEFGHKLM
2HB04501025, 46 10
27-1/4 25-1/4 14-1/4 1 4 1/2 5-1/2 1-1/2 1-1/2 22-1/4 19-1/42HB04502025, 46 20
2HB04503025, 46 30
2HB04505025, 46 50 29-7/8 26-3/8 21-3/4 2-3/8 5-1/4 3/4 6-3/4 2-1/4 2-1/2 22-1/4 19-1/4
1. 2HC04501025, 46 and 2HC04502025, and 46 are used on the FEH240 units only. The dimensions are the same as
shown above for the 2HB heaters. The 2HB heaters are installed on the drive side of the FEH240 and the 2HC heaters
are installed on the opposite side.
(See Table 5 for Dimensions.)
FIGURE 6 - RETURN AIR GRILLE FEH180
60-3/4
31
5/
8
FIGURE 7 - RETURN AIR GRILLE FEH240

035-16626-000-E-0103
10 UnitaryProductsGroup
DUCT CONNECTIONS
All ducts should be designed and installed in accor-
dance with all national and/or local codes.
Ducts should be sized no smaller than the duct flanges
on the unit or the electric heater (if used). Refer to the
unit dimensions (Figures 17 and 18) and heater detail
(Figure 5) for these sizes. Refer to PN 035-16602-001
for installation instructions on the electric heater.
Use flexible fiber glass or plastic cloth collars or other
nonflammable material at the unit duct connections to
minimize the transmission of noise and vibration.
Insulate all ductwork running through the uncondi-
tioned areas to prevent moisture condensation and to
provide more economical operation.
FIGURE 8 - BASE ACCESSORY FEH180
FIGURE 9 - BASE ACCESSORY FEH240
FIGURE 10 - SUPPLY AIR PLENUM FEH 1801
1. Electric Heaters are NOT UL approved for installation
within a SUPPLY AIR PLENUM.
24
31-5/8
60-3/4
BASE
1 9 - 7 / 8
1
6 - 1 / 8
2 - 1 / 2
5 5 - 3 / 4
6 0 - 3 / 4
1 - 1 / 8
3 1
1 - 3 / 4
1 9 - 1 / 2 2 7
2 - 1 / 2 K N O C K O U T F O R P O W E R W I R I N G
W H E N E L E C T R I C H E A T E R I S U S E D
FIGURE 11 - SUPPLY AIR PLENUM Knockouts
FEH180
FIGURE 12 - SUPPLY AIR PLENUM FEH2401
1. Shipped knocked down for field assembly.
3
1 - 1 / 2
1 1 - 1 / 2
K N O C K O U T S F O R P O W E R & C O N T R O L W I R I N G
1 9 - 1 / 2

035-16626-000-E-0103
Unitary Products Group 11
The return air duct flange is factory-mounted on the
front of the unit.
A supply air plenum (Figures 6 and 7), a base (Figures
8 and 9) and a return air grille (Figure 7) are available
as field-installed accessories, and one of the following
respective instructions will be packed with each.
• Form 035-16650-001 - Supply Air Plenum
• Form 035-16621-001 - Return Air Grille
• Form 035-16632-001 - Base Accessory
The supply air plenum and the return air grille should
be used in lieu of ductwork only wen a free blow/free
return application is practical.
REFRIGERANT MAINS
Many service problems can be avoided by taking ade-
quate precautions to provide and internally clean and
dry system and by using procedures and materials that
conform with established standards.
Use hard drawn copper tubing where no appreciable
amount of bending around pipes or other obstructions
is necessary. Use long radius ells wherever possible
with one exception - small radius ells for any traps in a
vapor riser. If soft copper is used, care should be
taken to avoid sharp bends which may cause a restric-
tion.
Fiber glass insulation and a sealing material such as
permagum should be packed around refrigerant lines
where they penetrate a wall to reduce vibration and to
retain some flexibiltiy.
Support all refrigerant lines at minimum intervals with
suitable hangers, brackets or clamps.
Braze all copper to copper joints with Sil-Fos 5 or
equivalent brazing material. DO NOT USE SOFT
SOLDER.
Never braze or solder the liquid and vapor lines
together for support purposes, they must be completely
insulated, one from the other.
Refer to the installation instructions (035-16192-001)
for the matching outdoor unit for piping limitations, line
sizes and other design considerations.
INSTALLING REFRIGERANT MAINS
The units are evacuated and dehydrated at the factory
and shipped with a holding charge of Refrigerant-22.
The vapor and liquid connections are sealed with cop-
per discs.
If the unit has already lost its holding charge, it should
be leak tested and the necessary repairs should be
made, if the unit has maintained its holding charge, you
can assume that it has no leaks and proceed with the
installation.
The temperature required to make or break a brazed
joint is sufficiently high to cause oxidation of the copper
unless an inert atmosphere is provided.
Make sure the refrigerant in the lines has been recov-
ered then drill a small hole through the discs to prevent
any internal pressure from blowing them off and to
allow the flow of dry nitrogen through the connections
when unbrazing the closures.
The liquid and vapor connections must be piped out-
side the unit. Refer to the unit drawings for the loca-
tions and the dimensions of these connections.
Before brazing the refrigerant lines to these connec-
tions, remove the short panel from the unit frame and
slide the grommets onto the refrigerant lines. After the
brazed joints have cooled, slide the grommets back
into place and secure the panel to the unit frame.
NOTE: These coils can only be piped from one side of
the unit.
DRAIN CONNECTION
The drain line MUST be trapped because the coil is
located on the negative side of the supply air blower,
and it must be protected from freezing temperatures.
A 7/8” OD drain connections extends through right
hand side of the cabinet. Refer to Figure 13 for recom-
mended drain piping.
The drain connection is located on the same side of the
unit as the refrigerant connections. The line should be
insulated where moisture drippage will be objection-
able or cause damage to the area.

035-16626-000-E-0103
12 UnitaryProductsGroup
The 3” dimension must equal or exceed the negative
static pressure developed by the supply air blower. If it
does not the condensate will not drain properly and
may overflow the drain pan. The trap must be at least
2-1/2” deep to maintain a water seal under all operat-
ing conditions, especially during blower start-up.
NOTE: The unit may have to be raised off the floor to
allow enough height for the trap.
SUPPLY AIR BLOWER ADJUSTMENT
The RPM of the supply air blower will depend on the
required CFM, the unit accessories and the static resis-
tances of both the supply and the return air duct sys-
tems. With this information, the RPM for the supply air
blower can be determined from the blower perfor-
manceinTable6.
Knowing the required blower RPM and the blower
motor HP, the settings (turns open) for the supply air
motor pulley can be determined from Table 6.
Each motor pulley has:
1. A threaded barrel with two flats (or notched
recesses 180° apart.
2. A movable flange with one set screw.
After the movable flange has been rotated to the
proper number of “turns open”, the set screw should be
tightened against the flat on the barrel to lock the mov-
able flange in place. If the pulley includes a locking
collar, the locking collar must be loosened to adjust the
setting of the movable flange.
Note the following:
1. The supply air CFM must be within the limitations
shown in Tables 7 and 8.
2. Allpulleyscanbeadjustedinhalfturnincrements.
3. The tension on the belt should be adjusted for a
deflection of 3/16” per foot of belt span with an
applied force of 2 to 3 pounds. This adjustment is
made by moving the blower motor mounting plate.
Refer to Figure 14. Turning the adjustment bolt (B)
moves the motor mounting plate up or down. Two
hex nuts (A have to be loosened to move the
mounting plate and retighten after the mounting
plate has been moved to the proper position.
NOTE: Never loosen the two nuts (C) (shown in Fig-
ure 14)
4. All pulleys are factory aligned.
5. All supply air motor pulleys are factory set at 3
“turns open”.
After the supply air blower motor is operating, adjust
the resistances in both the supply and the return duct
system to balance the air distribution throughout the
conditioned space. The job specification may require
that this balancing be done by someone other than the
equipment installer.
FIGURE 13 - RECOMMENDED DRAIN PIPING
5
2 - 1 / 2
P L A S T I C
E L L
STEEL
S T U B
C O N N E C T I O N
H O S E C L A M P S
E V A P O R A T O R
C O I L
D R A I N P A N
D R A I N
P L U G
TABLE 6: SUPPLY AIR BLOWER MOTOR PULLEY
ADJUSTMENT
TURNS
OPEN DRIVE RANGE
625-810 RPM 827-986 RPM
5 625 827
4 662 859
3 699 891
2 736 923
1 773 955
0 810 986

035-16626-000-E-0103
Unitary Products Group 13
To check the supply air CFM after the initial balancing
has completed”
1. Drill two 5/16” holes in the side panel as shown in
Figure 15.
2. Insert at lest 6” of 1/4” tubing into each of these
holes for sufficient penetration into the air flow on
both sides of the indoor coil.
NOTE: The tubes must be inserted and held in a posi-
tion perpendicular to the air flow so that veloc-
ity pressure will not affect the static pressure
reading.
3. Using an inclined manometer, determine the pres-
sure drop across a dry indoor coil. Since moisture
on the coil may vary greatly, measuring the pres-
sure drop across a wet coil under field conditions
would be inaccurate. To assure a dry coil, the heat
pump system should be de-activated while the test
is being run.
4. Knowing the pressure drop across a dry coil the
actual CFM through the unit can be determined
from the curve in Figure 16.
If the CFM is above or below the specified value, the
supply air motor pulley may have to be re-adjusted.
After one hour of operation, check the belt and pulleys
for tightness and alignment.
After readings have been obtained remove the tubes
and seal up the drilled holes in the side panel. Dot
plugs (5/16” - P/N 029-13880-000) are available
through Source One Parts ordering procedures.
NOTE: Shut down the heat pump system before tak-
ing any test measurements to assure a dry
indoor coil.
FIGURE 14 - TYPICAL MOTOR MOUNTING
ASSEMBLY
B
A
(DO NOT LOOSEN)
MOTOR
MOTOR MOUNT
C
FIGURE 15 - HOLE LOCATIONS FOR PRESSURE
DROP READINGS
FIGURE 16 - CFM VS PRESSURE DROP
5 / 1 6
H O L E
5 / 1 6
H O L E
18
7
22
10
E V A P O R A T O R
C O I L
F I L T E R S
C O I L S E C T I O N
0.1
0.2
0.3
0.4
0.5
4800 5600 6400 7200 8000 8800 9600
SUPPLY AIR CFM
PRESSURE DROP (IWG)
FEH180 FEH240

035-16626-000-E-0103
14 UnitaryProductsGroup
POWER AND CONTROL WIRING
Install electrical wiring in accordance with the latest
National Electrical Code (NFPA standard No. 70) and/
or local regulations. The unit should be grounded in
accordance with these codes.
Route the power wires into the unit through the 1-3/8”
knockout in the rear panel, and connect them to the ter-
minals on blower motor contactor 10M. Route the con-
trol wires into the unit through the 7/8” hole in the rear
panel, and connect them to the terminals on block 4TB.
Refer to the unit drawing in Figures 17 and 18 for the
location of these knockouts.
If the unit includes and electric heat accessory, route
the power wires into heater control box in lieu of the
unit. Refer to the electric heat instruction PN 035-
16602-001 for additional installation information.
Refer to Tables 9 and 10 to size the disconnect switch,
the power wiring, the fuses and the control wiring.
RefertoFigure11forfieldwiringdiagrams.
NOTE: Motors are wired for a 460V power supply.
Refer to the wiring diagram inside the motor
terminal box when reconnecting motor leads
for a 208 or 230 volt power supply.
TABLE7:SUPPLYAIRPREFORMANCEFEH180
1
RPM
CFM
4800 5400 6000 6600
ESP2BHP3kW4ESP2BHP3kW4ESP2BHP3kW4ESP2BHP3kW4
600 0.38 1.49 1.42 0.23 1.74 1.66 0.02 1.99 1.89 --- --- ---
650 0.58 1.73 1.65 0.43 1.99 1.89 0.24 2.29 2.18 --- --- ---
700 0.79 1.97 1.87 0.65 2.28 2.17 0.47 2.59 2.46 0.24 2.92 2.78
750 1.00 2.25 2.14 0.88 2.58 2.46 0.70 2.91 2.77 0.48 3.30 3.14
800 1.22 2.54 2.42 1.11 2.89 2.75 0.95 3.28 3.12 --- --- ---
850 1.45 2.85 2.71 1.35 3.24 3.08 --- --- --- --- --- ---
900 1.69 3.19 3.04 --- --- --- --- --- --- --- --- ---
1. Unit resistance based on a wet evaporator coil, clean filters, and unit tested in horizontal configuration.
2. Available static pressure in IWG to overcome the resistance of the duct system and any accessories added to the unit. Refer to
the respective tables for the resistance of these accessories and for additional motor and drive data.
3. Motors can be selected to operate into their service factor because they are located in the moving airstream, upstream of any
heating device.
4. kW is based on 6% drive losses and a motor efficiency of 83.1%. Calculate kW by using the following formula: kW = (746 X BHP
X DRIVE LOSSES) / (1000 X MOTOR EFFICIENCY)
TABLE 8: SUPPLY AIR PERFORMANCE FEH2401
RPM
CFM
6400 7200 8000 8800 9600
ESP2BHP3kW4ESP2BHP3kW4ESP2BHP3kW4ESP2BHP3kW4ESP2BHP3kW4
600 0.15 1.49 1.42 - - - - - - - - - - - -
650 0.31 1.71 1.63 0.14 2.00 1.90 - - - - - - - - -
700 0.49 1.95 1.86 0.32 2.27 2.16 0.12 2.63 2.50 - - - - - -
750 0.67 2.21 2.10 0.51 2.56 2.44 0.32 2.92 2.78 0.10 3.35 3.19 - - -
800 0.85 2.50 2.38 0.70 2.85 2.71 0.52 3.25 3.09 0.31 3.70 3.52 0.07 4.20 4.00
850 1.05 2.80 2.66 0.91 3.19 3.04 0.74 3.61 3.44 0.53 4.07 3.87 0.29 4.62 4.40
900 1.25 3.11 2.96 1.12 3.55 3.38 0.96 3.99 3.80 0.76 4.51 4.29 0.53 5.07 4.82
950 1.46 3.46 3.29 1.34 3.92 3.73 1.18 4.43 4.22 1.00 4.97 4.73 0.78 5.53 5.26
1000 1.67 3.82 3.64 1.56 4.33 4.12 1.42 4.88 4.64 1.24 5.44 5.18 - - -
1. Unit resistance is based on a wet evaporator coil, clean filters, and unit tested in horizontal configuration.
2. Available static pressure in IWG to overcome the resistance of the duct system and any accessories added to the unit. Refer to
the respective tables for the resistance of theses accessories and for additional motor and drive data.
3. Motors can be selected to operate into their service factor because they are located in the moving air stream, upstream of any
heating device.
4. kW is based on 6% drive losses and a motor efficiency of 83.1%. Calculate kW by using the following formula:
kW = (746 X BHP X DRIVE LOSSES) / (1000 X MOTOR EFFICIENCY)

035-16626-000-E-0103
Unitary Products Group 15
TABLE 9: ELECTRICAL RATINGS INDOOR UNIT - HEAT PUMP ONLY
BlowerMotor
HP Nominal Heater KW Power Supply Heater FLA
Minimum
Circuit
Ampacity
Maximum Fuse
Size1Minimum Wire
Size AWG2Maximum Wire Length feet3
Minimum
Disconnect
Amps
F1EH180A33
3
10 KW
208-3-60 20.8 35.5 40 8 AWG 140 60
230-3-60 23.1 38.1 40 8 AWG 133 60
460-3-60 11.5 19.0 20 14 AWG 132 30
20 KW
208-3-60 41.6 61.5 70 6 AWG 222 60
230-3-60 46.2 66.9 70 4 AWG 337 100
460-3-60 23.1 33.5 35 10 AWG 335 60
30 KW
208-3-60 62.5 87.6 90 3 AWG 446 100
230-3-60 69.3 95.8 100 3 AWG 423 100
460-3-60 34.6 47.8 50 8 AWG 533 60
50 KW
208-3-60 104.4 140.0 150 0 AWG 895 150
230-3-60 115.2 153.2 175 2/0 AWG 1073 150
460-3-60 57.6 76.6 80 4 AWG 1347 100
F1EH240A
5
20 KW
208-3-60 41.6 68.0 70 4 AWG 186 100
230-3-60 46.2 70.6 80 4 AWG 251 100
460-3-60 23.1 35.3 40 8 AWG 381 60
30 KW
208-3-60 62.5 94.1 100 3 AWG 233 100
230-3-60 69.3 99.4 100 3 AWG 315 100
460-3-60 34.6 49.7 50 8 AWG 381 60
40 KW
208-3-60 83.3 120.1 125 1 AWG 371 150
230-3-60 92.1 127.9 150 1 AWG 501 150
460-3-60 46.1 64.0 70 6 AWG 604 100
50 KW
208-3-60 104.4 146.5 150 0 AWG 469 150
230-3-60 115.2 156.8 175 2/0 AWG 798 150
460-3-60 57.6 78.4 80 4 AWG 962 100
1. Maximum fuse or maximum circuit breaker (HACR type per NEC).
2. Based on three, 75 C insulated copper conductors in conduit and ambient of 30 C.
3. Based on a 5% voltage drop, since unit controls are powered off the unit supply. Two minute time delay between system 1 and
system 2.

035-16626-000-E-0103
16 UnitaryProductsGroup
TABLE 10: ELECTRICAL RATINGS INDOOR UNIT - HEAT PUMP WITH ELECTRIC HEAT1
Blower Motor HP Nominal
Heater KW Power Supply Heater FLA Minimum
Circuit
Ampacity
Maximum
Fuse Size2
Minimum
Wire Size
AWG3
Maximum Wire
Length feet4
Minimum
Disconnect
Amps
F1EH180A33
3
10 KW
208-3-60 20.8 35.5 40 8 AWG 140 60
230-3-60 23.1 38.1 40 8 AWG 133 60
460-3-60 11.5 19.0 20 14 AWG 132 30
20 KW
208-3-60 41.6 61.5 70 6 AWG 222 60
230-3-60 46.2 66.9 70 4 AWG 337 100
460-3-60 23.1 33.5 35 10 AWG 335 60
30 KW
208-3-60 62.5 87.6 90 3 AWG 446 100
230-3-60 69.3 95.8 100 3 AWG 423 100
460-3-60 34.6 47.8 50 8 AWG 533 60
50 KW
208-3-60 104.4 140.0 150 0 AWG 895 150
230-3-60 115.2 153.2 175 2/0 AWG 1073 150
460-3-60 57.6 76.6 80 4 AWG 1347 100
F1EH240A
5
20 KW
208-3-60 41.6 68.0 70 4 AWG 186 100
230-3-60 46.2 70.6 80 4 AWG 251 100
460-3-60 23.1 35.3 40 8 AWG 381 60
30 KW
208-3-60 62.5 94.1 100 3 AWG 233 100
230-3-60 69.3 99.4 100 3 AWG 315 100
460-3-60 34.6 49.7 50 8 AWG 381 60
40 KW
208-3-60 83.3 120.1 125 1 AWG 371 150
230-3-60 92.1 127.9 150 1 AWG 501 150
460-3-60 46.1 64.0 70 6 AWG 604 100
50 KW
208-3-60 104.4 146.5 150 0 AWG 469 150
230-3-60 115.2 156.8 175 2/0 AWG 798 150
460-3-60 57.6 78.4 80 4 AWG 962 100
1. Unit with an electric heat accessory will always be wired for a single power supply
2. Maximum fuse or maximum circuit breaker (HACR type per NEC).
3. Based on three 75 C insulated copper conductors in conduit and ambient of 30 C
4. Based on a 5% voltage drop, since unit controls are powered off the unit supply. Two minute time delay between system 1 and
system 2.

035-16626-000-E-0103
Unitary Products Group 17
MAINTENANCE
INDOOR COIL
Do not allow dirt to accumulate on the indoor coil or
other parts of the supply/return air circuit. Clean as
often as necessary to assure good system perfor-
mance. Use a brush vacuum cleaner attachment or
other suitable means.
If the coil becomes extremely dirty, it may be neces-
sary to use an industrial grade detergent and a hose to
clean the finned surfaces. This is recommended to
prevent any loss in capacity and efficiency.
FILTERS
The filters must be replaced as often as necessary to
assure good air flow and filtering action. Clean filters
will prevent any loss in capacity and efficiency.
Refer to the unit drawing in Figures 17 and 18 for the
location of the filter access panel.
DRAIN PAN
The condensate drain pan should be inspected regu-
larly to assure proper drainage.
LUBRICATION
The bearings for the blower shaft and the blower motor
are permanently lubricated and should not require any
additional lubricant.
BELTS
Maintain belt tension to extend belt life. Replace the
signs of failure begin to appear.
TABLE 11: TYPICAL FIELD WIRING
Y1
W 1
Y2
C
R
X
O
HC
O
HR
G
W 1
Y2
Y1
R
C
X
R
C
Y1
Y2
O
W 1
X
G
TB1 TB2
TERMINALS ON:
SupplyAirBlowerMotor
Contactor 10M
OR
Terminal Block Electric
Heat Control Box
GROUND SCREW
"Heat Pump Only" Units
GROUND LUG
Units with Electric
Heat Accessory
3 PHASE LINE VOLTAGE POWER SUPPLY
Refer to electrical data to size the power
wiring, disconnect switch and overcurrent
protection*.
USE COPPER CONDUCTORS ONLY
TERMINALS ON
COMPRESSOR
CONTACTORS 1M &3M
GROUND
LUG
INDOOR UNIT OUTDOOR UNIT TERMINALS ON HEAT
PUMP THERMOSTAT
1
1
Control wiring (24 volt)
refer to electrical data
to determine the proper
wire size.
* All outdoor units and all heat pumps only
indoor units require dual elements, time
delay fuses. Circuit breakers can be used
in lieu of fuses for indoor units with an
electric heat accessory.
WIRE IN ACCORDANCE WITH LOCAL
AND NATIONAL ELECTRICAL CODES
1
Only required when using an
electric heat accessory.

035-16626-000-E-0103
18 UnitaryProductsGroup
FIGURE 17 - UNIT DIMENSIONS FEH180
27-5/8
2-3/8
2-3/16
56-3/8
1
2-3/16
31-5/8
62-5/8
FILTER ACCESS PANEL
Filters can be removed
through either side of
the unit.
COIL
SECT.
BLOWER
SECTION
32-3/8
6
7-1/4 16-1/2
7/8
BLOWER MOTOR AND DRIVE ACCESS PANEL
(Always on the wiring connection side of unit)
Located on o osite side ONLY when the blower
section has been rotated 180 from osition shown.
1-23/32" KNOCKOUT
Remove only when Electric
Heat Accessory is used.
7/8" KNOCKOUT FOR POWER WIRING
Do not remove this knockout when the unit is equi ed with an Electric
Heat Accessory. Refer to detail of the Heater Accessory for ower
wiring access o ening.
7/8" KNOCKOUT FOR
CONTROL WIRING
ALTERNATE
2-5/8" KNOCKOUT*
*Refer to INSTALLING REFRIGERANT MAINS in installation instruction
when i ing through the o osite side of the unit.
AIR
IN
12-7/8
2-7/8
2-7/8
Ø 1-3/8
ALL DIMENSIONS ARE IN INCHES THEY
ARE SUBJECT TO CHANGE WITHOUT
NOTICE. CERTIFIED DIMENSIONS WILL
BE PROVIDED UPON REQUEST.
ACCESSORIES
Electric Heaters - Add 14-1/4 inches to unit height when
using 10, 20, 30 or 50 kW heater.
Plenum - Add 27 inches to overall unit height when used.
Base Add 24 inches to overall unit height when used.
5-11/16
8-1/2
9-1/2
4
Ø 2"
Ø 2"
2-1/8
18-7/8
5-1/2
AIR
OUT 5-7/8
19-3/8 21-7/8
60-3/4
TABLE 12: FEH180/240 MINIMUM CLEARANCES
Side with RETURN AIR opening 24”
Side with SUPPLY AIR opening 24”
1
1. Overall dimensions of the unit will vary if an electric
heater, a supply air plenum or a base is used.
Side with PIPING CONNECTIONS 61”
2
2. This dimension is required for removal of the coil. Only
26” is required for normal service.
Side with access to both POWER & CONTROL WIRING -3
3. If the coil has to be removed, this dimension is required
to loosen screws that secure the coil to the unit frame.
This dimension will also be required for blower motor
access if the piping connections are made on the oppo-
site side of the unit
Bottom -4
4. Allow enough clearance to trap the condensate drain
line.

035-16626-000-E-0103
Unitary Products Group 19
Clearances for FEH240
• 24” on one side for piping connection and access
to blower motor
• 1” on opposite sides and rear
FIGURE 18 - UNIT DIMENSIONS FEH240

Subject to change without notice. Printed in U.S.A. 035-16626-000-E-0103
Copyright ©by Unitary Products Group 2003. All rights reserved. Supersedes: 035-16626-000-D-0502
Unitary 5005 Norman
Products York OK
Group Drive 73069