York FCHP090 User manual

GENERAL
These completely assembled indoor units include a well-
insulated cabinet, a copper tube/aluminum fin coil, throw-
away filters, a centrifugal blower, a blower motor, an adjust-
able V-belt drive, a blower motor contactor and a small
holding charge of an inert gas. They also include a filter-
drier,anexpansionvalveandadistributorthatareonlyused
during the cooling cycle plus A check valve to provide the
proper flow of refrigerant through the coil during both the
cooling and heating cycles.
Supplementalresistanceheaters,asupplyairplenum,areturn
airgrilleandabaseareavailableasaccessoriesforfieldinstal-
lation.
The units are shipped in the vertical position ready for field in-
stallation. For horizontal installation, reverse the solid bottom
panel and the return air duct flange on the front of the unit.
REFERENCE
Thisinstructioncoverstheinstallationof the indoor unit. Forin-
formationonthe installationandoperationofthe matching out-
door unit, refer to Form 035-15409-002.
Renewal Parts:
•Refer to Parts Manual for complete listing of replacement
parts on this equipment.
All forms referenced in this instruction may be ordered from:
Standard Register
Toll Free Tel.: [phone]
Toll Free Fax: [phone]
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
thatpersonalinjuryand/or equipmentdamagemayresultif the
installation procedure is not handled properly.
INSPECTION
As soon as a unit is received, it should be inspected for possi-
ble damage during transit. If damage is evident, the extent of
thedamageshouldbenotedonthecarrier'sfreightbill.Asepa-
MODELS FCHP090 & FDHP120
INSTALLATION
MANUAL Supersedes: 515.41-N2W (194)/035-11845-000 035-11845-001-A-0304
SPLIT-SYSTEM HEAT PUMPS
INDOOR UNITS
CAUTION
THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE
WITH THE ENCLOSED INSTALLATION INSTRUCTIONS AND
ANY APPLICABLE LOCAL, STATE, AND NATIONAL CODES
INCLUDING, BUT NOT LIMITED TO, BUILDING, ELECTRICAL,
AND MECHANICAL CODES.
WARNING
IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION,
SERVICE OR MAINTENANCE CAN CAUSE INJURY OR
PROPERTY DAMAGE. REFER TO THIS MANUAL. FOR
ASSISTANCE OR ADDITIONAL INFORMATION, CONSULT A
QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS
SUPPLIER.

035-11845-001-A-0304
2 Unitary Products Group
TABLE OF CONTENTS
GENERAL ............................................................................. 1
REFERENCE ............................................................................. 1
INSPECTION ............................................................................. 1
NOMENCLATURE...................................................................... 2
INSTALLATION
LIMITATIONS ............................................................................. 3
LOCATION ............................................................................. 3
RIGGING ............................................................................. 3
CLEARANCES ........................................................................... 3
VERTICAL/HORIZONTAL INSTALLATION................................ 5
DUCT CONNECTIONS .............................................................. 5
REFRIGERANT MAINS.............................................................. 6
DRAIN CONNECTION ............................................................... 6
SUPPLY AIR BLOWER ADJUSTMENT ..................................... 7
POWER AND CONTROL WIRING............................................. 10
MAINTENANCE
INDOOR COIL............................................................................ 12
DRAIN PAN ............................................................................. 12
FILTERS ............................................................................. 12
LUBRICATION............................................................................ 12
BELTS ............................................................................. 12
FIGURES
Figure
No. Description Page
1 Unit Suspension Mounting................................... 4
2 Vertical & Horizontal Application.......................... 5
3 Electric Heater Accessory.................................... 5
4 Supply Air Plenum Accessory.............................. 5
5 Base Accessory ................................................... 5
6 Return Air Grille Accessory.................................. 6
7 Recommended Drain Piping................................ 6
8 Motor Mounting Assembly.................................... 7
9 Hole Locations for Pressure Drop........................ 8
10 Pressure Drop vs Supply Air CFM ....................... 8
11 Field Wiring.......................................................... 10
12 Unit Dimensions & Clearances ............................ 11
TABLES
Table
No. Description Page
1 Physical Data....................................................... 3
2 Application Data................................................... 4
3 Blower Motor Pulley Adjustment.......................... 7
4 Blower Performance (60Hz Units)........................ 8
5 Accessory Static Resistance................................ 9
6 Blower Motor & Drive Data................................... 9
7 Electrical Data...................................................... 9
Refer to the matching outdoor unit installation
instruction (Form 035-15409-002) for the operating
sequence of the entire system.
F D H P - S 2 A
PRODUCT NOMENCLATURE
PRODUCT GENERATION
C = 3rd Generation
D = 4th Generation
PRODUCT CATEGORY
PRODUCT IDENTIFIER
HP = Indoor Unit
VOLTAGE CODE
-S = 208/230/460-3-60
NOMINAL COOLING
CAPACITY (@ 60 Hz)
090 = 7-1/2 Ton
120 = 10 Ton
FACTORY INSTALLED
HEAT
1 0
F = Split-System Heat Pump
Indoor Unit A = No Heat Installed

rate request for inspection by the carrier's agent should be
made in writing.
LIMITATIONS
These units must be installed in accordance with all national
andlocalsafetycodes.Ifnolocalcodesapply,installationmust
conform with the appropriate national codes. Units are de-
signedtomeetNationalSafetyCodeStandards.Ifcomponents
are to be added to a unit to meet local codes, they are to be in-
stalled at the dealer's and/or the customer's expense. See Ta-
ble 2 for application limitations.
LOCATION
These indoor units are not designed for outdoor installation.
Theymustbelocatedwithinthebuildingstructure,eitherinside
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.
Unitsbeinginstalledverticallyorhorizontallycanbesetdirectly
on a floor or platform, or they can be supported by metal or
wooden beams.
Units being installed horizontally can be suspended from
above.Four3/8"weldnutsare provided in the unit frame to ac-
commodate hanger rods. Knockouts must be removed from
the unit panels to expose these weld nuts. Refer to Figure 1 for
their location and the individual load on each hanger rod.
WARNING: Be careful when attaching the hanger rods. Use a
washerwithaback-upnutoneachrodandtighten
down against the cabinet so they will not be al-
lowed to turn or slip.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any pack-
aging until the unit is near the place of installation.
The packaging consists of a bottom wooden skid that can be
liftedwithaforktruckfrom anydirection,acardboardcontainer
thatcovers theentireunit, andstrappingthat securesthecard-
board container to the bottom skid.
These units can be rigged with slings under the bottom skid.
CAUTION: Spreader bars should be used to prevent the
slings from crushing the unit panels and frame.
Before rigging any unit, determine its weight from Table 1. Bef-
oreriggingaunitforhorizontalinstallation,determineitscenter
of gravity from Figure 1, and make sure that its weight will be
distributed equally.
CLEARANCES
All units require certain minimum clearances for proper opera-
tion and service. Refer to Figure 12 for these clearances.
035-11845-001-A-0304
Unitary Products Group 3
INSTALLATION
DESCRIPTION UNIT MODEL
FCHP090 FDHP120
Coil
Rows Deep x Rows High 3 x 24 4 x 32
Finned Length - inches 45.5 45.5
Face Area - square feet 7.6 10.1
Tube (Copper) OD - inches 3/8 3/8
Fins (Aluminum) per inch 13 13
Centrifugal Blower (Forward Curve) Diameter x Width - inches 15 X 15 15 X 15
Blower Motor1Nominal Rating - HP 1-1/2 2
Filters (Throwaway) Quantity Per Unit - 16" x 25" x 1" 4 4
Total Face Area - square feet 11.1 11.1
Refrigerant-22 (Lbs.)2Pumpdown Capacity 12.0 22.0
Unit Weight (lbs.) Shipping 405 440
Operating 365 400
Accessory Operating Weights (Lbs.)
Electric Heaters
10 KW 63 63
16 KW 66 66
26 KW 71 71
36 KW 74 74
Supply Air Plenum 102 102
Base 60 60
Return Air Grille 15 15
1All of these 1750 RPM motors have a solid base, a 56 frame, a 1.15 service factor, inherent protection & permanently lubricated ball bearings. Refer to page 6 for additional motor & drive data.
2Refer to Form 035-15409-002 for system charge.
TABLE 1 - PHYSICAL DATA

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FIG. 1 - UNIT SUSPENSION MOUNTING(Horizontal Application)
Model Power
Supply Voltage Variation1Supply Air CFM Entering Air Temperatures, °F
Cooling - wb Heating - db
Min. Max. Min. Max. Min. Max. Min. Max.
FCHP090 208/230-3-60 187 252 2400 3600 57 72 50280
460-3-60 414 506
FDHP120 208/230-3-60 187 252 3200 4800 57 72 50280
460-3-60 414 506
1Utilization Range “A” in accordance with ARI Standard 110.
2The system may operate below 50°F for a short period of time when warming up the conditioned space after a long shutdown.
TABLE 2 - APPLICATION DATA
Model Accessory
Based on a Standard Blower Motor
Center of Gravity
Dimensions, In. Weight Distribution, Lbs.
A B W1 W2 W3 W4 Total
FHP090
Basic Unit Only 25-5/8 23-1/4 99 104 79 83 365
Unit with Electric Heat 30-3/4 23-3/8 90 150 72 121 433
Unit with Plenum 35-1/8 23-1/2 71 186 58 152 467
Unit with Electric Heat & Plenum 38 23-5/8 62 232 51 190 535
FHP120
Basic Unit Only 24-1/8 23-1/4 116 106 93 85 400
Unit with Electric Heat 29-1/4 23-3/8 103 155 84 126 468
Unit with Plenum 33-3/8 23-1/2 88 190 70 154 502
Unit with Electric Heat & Plenum 36-5/8 23-5/8 76 236 63 195 570
NOTE: Unit weights (with electric heat accessory) are based on an average heater weight of 68 lbs.

WARNING: Do not permit overhanging structures or shrubs to
obstruct air discharge.
Additional height may be required for snow clearance if winter
operation is expected.
VERTICAL / HORIZONTAL INSTALLATION
Theseindoor unitsareshipped for vertical installation with ver-
tical air discharge as shown in Figure 2(A) but may be con-
verted for horizontal installation as shown in Figure 2(B) by
interchanging the solid bottom panel and the return air duct
flange.
DUCT CONNECTIONS
Design and install all ducts in accordance with all national
and/or local codes.
Ducts should be sized no smaller than the duct flanges on the
unitorthe electric heater(ifused).Refer to theunitdimensions
(Fig. 12) and the heater detail (Fig. 3) for these sizes. Refer to
Form035-16602-002forinstallationinstructionsontheelectric
heater.
Useflexiblefiber glass or plastic cloth collars or other nonflam-
mable material at the unit duct connections to minimize the
transmission of noise and vibration.
Insulate all ductwork running through unconditioned areas to
prevent moisture condensation and to provide more economi-
cal operation.
Thereturnair duct flange is factory-mounted onthefrontofthe
unit, but it can be reversed with the solid bottom panel for hori-
zontal applications.
A supply air plenum (Fig. 4), a base (Fig. 5) and a return air
grille (Fig. 6) are available as field-installed accessories, and
one of the following respective instructions will be packed with
each.
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Unitary Products Group 5
FIG. 2 - VERTICAL AND HORIZONTAL APPLICATIONS
FIG. 3 - ELECTRIC HEATER ACCESSORY
(Vertical Arrangement Shown)
Plenum should be field mounted on the supply air end of indoor
units for either vertical or horizontal application. For rear discharge,
rotate plenum 180°. For horizontal discharge on a horizontal unit,
the grille panel and the top panel will be arranged differently. Refer
to Form 035-16650-001 for installation and assembly instructions.
FIG. 4 - SUPPLY AIR PLENUM ACCESSORY
(Vertical Arrangement Shown)
FIG. 5 - BASE ACCESSORY
(For Vertical Arrangement Shown)

Form 035-16650-001 – Supply Air Plenum
Form 035-16621-001 – Return Air Grille
Form 035-16632-001 – Base
Thesupplyairplenumandthereturnairgrilleshouldbeusedin
lieuof ductwork onlywhena free blow/freereturnapplication is
practical.
REFRIGERANT MAINS
Many service problems can be avoided by taking adequate
precautions to provide an internally clean and dry system and
by using procedures and materials that conform with estab-
lished standards.
Useharddrawncoppertubingwherenoappreciableamountof
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
restriction.
Fiber glass insulation and a sealing material such as perma-
gum should be packed around refrigerant lines where they
penetrate a wall to reduce vibration and to retain some flexibil-
ity.
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. The
completevaporlineshouldbeinsulatedwithminimum1/2"AR-
MAFLEX or equivalent.
If it is desirable to tape or wire these lines together for support
purposes, they must be completely insulated, one from the
other.
Refer to the installation instruction (Form 035-15409-002) for
the matching outdoor unit for piping limitations, line sizes, and
other design considerations.
INSTALLING REFRIGERANT MAINS
WARNING: Provisions for recovering refrigerant releases
must be available during all phases of installation,
leak testing and charging. Do NOT release refrig-
erant into the atmosphere.
The units are evacuated and dehydrated at the factory and
shipped with a holding charge of an inert gas such as Nitrogen
or Helium. The vapor and liquid connections are sealed with
copper 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
sufficientlyhightocauseoxidationofthecopperunlessaninert
atmosphere is provided.
Drillasmallholethroughthediscs topreventanyinternalpres-
surefrom blowing them offand to allow the flow of drynitrogen
through the connections when unbrazing the closures.
The liquid and vapor connections must be piped outside the
unit. Refer to the unit drawing for the locations and the dimen-
sions of these connections.
Before brazing the refrigerant lines to these connections, re-
move the short panel from the unit frame and slide the grom-
mets 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: Thesecoilscanonlybepipedfromonesideoftheunit.
DRAIN CONNECTION
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FIG. 6 - RETURN AIR GRILLE ACCESSORY
(Vertical Arrangement Shown)
FIG. 7 - RECOMMENDED DRAIN PIPING

The drain line MUST be trapped because the coil is located on
the negative side of the supply air blower, and it must be pro-
tected from freezing temperatures.
A7/8" OD drain connection extends through right hand side of
cabinet. Refer to Fig. 7 for recommended drain piping.
The drain connection is located on the same side of the unit as
therefrigerantconnections.Thelineshouldbeinsulatedwhere
moisturedrippagewillbeobjectionableorcausedamagetothe
area.
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 operating 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,theunitaccessoriesandthestaticresistancesofboththe
supply and the return air duct systems. With this information,
the RPM for the supply air blower can be determined from the
blower performance in Table 4.
Knowing the required blower RPM and the blower motor HP,
the setting (turns open) for the supply air motor pulley can be
determined from Table 3.
Each motor pulley has:
1. Athreaded barrel with two flats (or notched recesses) 180
degrees 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
againsttheflatonthebarreltolockthemovableflangeinplace.
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
Table 2.
2. All pulleys can be adjusted in half turn increments.
3. The tension on the belt should be adjusted for a deflection
of3/16 of an inch perfoot ofbeltspanwithanapplied force
of 2 to 3 pounds. This adjustment is made by moving the
blowermotormountingplate.RefertoFigure8.Turningthe
adjustment bolt (B) moves the motor mounting plate up or
down.
NOTE: Never loosen the two nuts (C).
Two hex nuts (A) have to be loosened to move the mount-
ingplateandretightenedafterthemountingplatehasbeen
moved to the proper position.
4. All pulleys are factory aligned.
5. All supply air motor pulleys are factory set 3 “turns open”.
After the supply air blower motor is operating, adjust the resis-
tances in both the supply and the return duct systems to bal-
ancetheairdistributionthroughouttheconditionedspace.The
job specifications may require that this balancing be done by
someone other than the equipment installer.
TocheckthesupplyairCFMaftertheinitialbalancinghasbeen
completed:
1. Drill two 5/16 inch holes in the side panel as shown in Fig-
ure 9.
2. Insert at least 6" of 1/4 inch 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 position
perpendicular to the air flow so that velocity pres-
sure will not affect the static pressure readings.
3. Usinganinclinedmanometer,determinethepressuredrop
across a dry indoor coil. Since moisture on the coil may
varygreatly,measuring the pressuredropacross awetcoil
underfieldconditionswouldbeinaccurate.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 10.
035-11845-001-A-0304
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FIG. 8 - TYPICAL MOTOR MOUNTING ASSEMBLY
TURNS
OPEN*
MODEL
FHP090
60 Hz FHP120 60 Hz
5 655 RPM 700RPM
4 760 750
3 745 800
2 790 850
1 835 900
0 880 950
*Pulleys can be adjusted in half-turn increments.
TABLE 3 - SUPPLY AIR BLOWER MOTOR
PULLEY ADJUSTMENT

If the CFM is above or below the specified value, the supply air
motor pulley may have to be readjusted. After one hour of op-
eration,checkthebeltandpulleysfortightnessandalignment.
WARNING: Failure to properly adjust the total system CFM
can result in extensive blower damage.
After readings have been obtained, remove the tubes and seal
upthedrilledholesinthesidepanel.Dotplugs(5/16"-P/N029-
13880-000) are available through normal parts ordering
procedures.
NOTE: Shut down the heat pump system before taking any
test measurements to assure a dry indoor coil.
035-11845-001-A-0304
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FIG. 9 - HOLE LOCATIONS FOR PRESSURE
DROP READINGS
PRESSURE DROP
ACROSS DRY INDOOR COIL
0.1
0.2
0.3
0.4
0.5
2000 2400 2800 3200 3600 4000 4400 4800 5200
SUPPLY AIR CFM
PRESSURE DROP (IWG)
FHP090
FHP120
FIG. 10 - PRESSURE DROP ACROSS ADRY
INDOOR COIL VS. SUPPLY AIR CFM
RPM CFM
ESP2BHP KW ESP2BHP KW ESP2BHP KW ESP2BHP KW ESP2BHP KW
FCHP090 (60 Hz)
2400 2700 3000 3300 3600
600 0.30 0.62 0.79 0.21 0.70 0.76 0.09 0.78 0.89 ------
655 0.43 0.70 0.86 0.39 0.78 0.83 0.26 0.87 0.97 0.11 0.96 1.07 - - -
700 0.52 0.77 0.93 0.48 0.85 0.90 0.40 0.95 1.06 0.28 1.06 1.16 0.14 1.17 1.26
800 0.82 0.97 1.10 0.81 1.06 1.07 0.74 1.18 1.27 0.63 1.30 1.38 0.51 1.42 1.49
880 1.10 1.11 1.24 1.09 1.24 1.21 1.02 1.37 1.45 0.91 1.50 1.55 0.78 1.64 1.70
900 1.15 1.15 1.27 1.14 1.28 1.24 1.07 1.42 1.49 0.97 1.55 1.60 0.87 1.70 1.74
1000 1.49 1.35 1.46 1.47 1.48 1.43 1.42 1.63 1.65 1.35 1.81 1.82 1.27 2.02 2.02
FDHP120 (60 Hz)
3200 3600 4000 4400 4800
700 0.30 1.01 1.17 0.15 1.17 1.27 ---------
800 0.66 1.25 1.38 0.52 1.42 1.51 0.31 1.60 1.64 0.08 1.80 1.78 - - -
900 0.99 1.48 1.60 0.87 1.70 1.77 0.69 1.92 1.93 0.47 2.18 2.09 0.19 2.45 2.23
950 1.20 1.61 1.71 1.08 1.86 1.90 0.90 2.12 2.07 0.72 2.39 2.23 0.41 2.67 2.42
1000 1.37 1.75 1.83 1.27 2.02 2.02 1.11 2.30 2.20 0.92 2.60 2.39 0.63 2.90 2.59
11Unit resistance is based on a wet indoor coil and clean filters.
2Available static pressure in IWG to overcome the resistance of the duct system and any accessories added to the unit. Refer to the Tables 5 & 6 for the resistance of these accessories and for
additional motor and drive data .
3Motors can be selected to operate into the service factor because they are located in the moving air stream, upstream of any heating device.
TABLE 4 - SUPPLY AIR BLOWER PERFORMANCE1,3 (60 Hz Units)
Exceeds the BHP limitations of the standard blower motor.
RPM range for the standard drive components.

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Unitary Products Group 9
Model Accessory Static Resistance, IWG
BLOWER CFM 2400 2700 3000 3300 3600
FHP090
Electric
Heat
10 KW 0.01 0.01 0.01 0.02 0.02
16 KW 0.01 0.02 0.02 0.03 0.04
26 KW 0.03 0.04 0.05 0.06 0.07
36 KW 0.05 0.07 0.08 0.10 0.11
Supply Air Plenum 0.03 0.03 0.04 0.05 0.06
Return Air Grille 0.02 0.03 0.04 0.05 0.06
BLOWER CFM 3200 3600 4000 4400 4800
FHP120
Electric
Heat
10 KW 0.02 0.02 0.03 0.03 0.04
16 KW 0.03 0.04 0.05 0.06 0.07
26 KW 0.06 0.07 0.09 0.11 0.13
36 KW 0.09 0.11 0.14 0.17 0.20
Supply Air Plenum 0.05 0.06 0.07 0.08 0.10
Return Air Grille 0.05 0.06 0.07 0.08 0.10
TABLE 5 - ACCESSORY STATIC RESISTANCE (IWG)(To be included with Duct System Static Resistance)
Model Motor HP* Blower RPM Adjustable Motor Pulley Fixed Blower Pulley Belt
Pitch Dia.
(Inches) Bore (Inches) Pitch Dia. (Inches) Bore (Inches) Designation Pitch Lg. (Inches)
60 Hz FHP090 1-1/2 655 - 880 2.8 - 3.8 7/8 7.5 1 A36 37.3
FHP120 2 700 - 950 7.0
*These factory-mounted motors are wired for a 460V power supply. Refer to the wiring diagram inside the motor terminal box when reconnecting the motor leads for a
208 or 230 volt power supply.
TABLE 6 - BLOWER MOTOR AND DRIVE DATA
Blower
Motor
HP Power
Supply FLA Max. Fuse
Size,1
AMPS
Max. Wire
Length2
(Ft.)
FCHP090
1-1/2 208-3-60 5.3 10 207 230-3-60 5.8 10 209
460-3-60 2.7 5 897
FDHP120
2208-3-60 7.5 10 146 230-3-60 6.8 10 178
460-3-60 3.4 5 712
NOTE: Refer to Form 035-16602-002 for electrical data on units equipped with an electric
heat accessory.
1Dual element, time delay fuses.
2Based on three 60°C, 14 AWG, insulated copper conductors in steel conduit, a 3% voltage
drop.
TABLE 7 - ELECTRICAL DATA CONTROL WIRE SIZING
Wire Size Maximum Total Circuit Length
(Feet)
#19 Solid 130
#18 Solid 170
#18 Stranded 180
#16 Stranded 270
#14 Stranded 455
#12 Stranded 730
To determine the total circuit length, add the following distances:
1 - Outdoor Unit to Indoor Unit ___________
2 - Indoor Unit to Thermostat ____________
3 - Thermostat to Indoor Unit ____________
4 - Indoor Unit to Outdoor Unit ___________
5 - Outdoor Unit to Elec. Heater __________
Total Circuit Length __________

POWER AND CONTROL WIRING
Install electrical wiring in accordance with the latest National
Electrical Code (NFPA Standard No. 70) and/or local regula-
tions. The unit should be grounded in accordance with these
codes.
Routethepowerwires intotheunitthroughthe 1-3/8”knockout
in the rear panel, and connect them to the terminals on blower
motor contactor 10M. Route the control wires into the unit
throughthe 7/8"holeinthe rearpanel,andconnectthem tothe
terminals on block 4TB. Refer to the unit drawing in Fig. 12 for
the locations of these knockouts.
If the unit includes an electric heat accessory, route the power
wires into heater control box in lieu of the unit. Refer to electric
heatinstruction Form 035-16602-002foradditional installation
information.
NOTE: Motorsare wiredfora460Vpower supply.Refertothe
wiring diagram inside the motor terminal box when re-
connecting motor leads for a 208 or 230 volt power
supply.
RefertoTable6tosizethedisconnectswitch,thepowerwiring,
the fuses and the control wiring. Refer to Fig. 11 for field wiring
diagram.
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NOTE: Refer to electric heat instruction 035-16602-002 for additional
power and control wire requirements if the indoor unit is
equipped with an electric heat accessory.
NOTE: For thermostat to be used on these units refer to form #036-13429-003.
FIG. 11 - FIELD WIRING
If the supply air blower rotates in the wrong direction,
reversetwoofthemotorleadsatblowermotorcontactor
10M.

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Unitary Products Group 11
FIG.12 - UNIT DIMENSIONS & CLEARANCES (FHP090 & 120)
All dimensions are in inches. They are
subject to change without notice. Certified
dimensions will be provided upon request.
ACCESSORIES
•ELECTRIC HEATER - Add 14-1/4" to unit height when used.
•SUPPLY AIR PLENUM - Add 27-1/2" to unit height when used.
•BASE - Add 20" to unit height when used.
CLEARANCES
Side with RETURN AIR opening 24"
Side with SUPPLY AIR opening 24"1
Side with PIPING CONNECTIONS 52"2
Side opposite PIPING CONNECTIONS 12"
Side with access for both POWER & CONTROL WIRING –3
Bottom –4
1Overall dimension of the unit will vary if an electric heater, a
supply air plenum or a base is used.
2This dimension is required for removal of the coil. Only 26" is
required for normal servicing.
3Although no clearance is required for service and operation,
some clearance may be required for routing the power wiring
and the control wiring.
4Allow enough clearance to trap the condensate drain line.

SECUREOWNER'S APPROVAL:Whenthesystem isfunctioningproperly,securethe owner'sapproval.Showhimthe
location of all disconnect switches and the thermostat. Teach him how to start and stop the unit, how to adjust temperature
settings within the limitations of the system, how the defrost cycle is controlled and how the anti-cycle timer operates.
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 performance. Use a brush, vacuum
cleaner attachment or other suitable means.
If the coil becomes extremely dirty, it may be necessary to use
anindustrialgradedetergentandahosetocleanthefinnedsur-
faces.This isrecommended topreventany lossincapacityand
efficiency.
DRAIN PAN
The condensate drain pan should be inspected regularly to as-
sure proper drainage.
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 Fig. 12 for the location of the filter
access panel.
LUBRICATION
Thebearingsforthe blowershaftandtheblowermotor areper-
manentlylubricatedandshouldnotrequireanyadditionallubri-
cant.
BELTS
Maintain belt tension to extend belt life. Replace when signs of
failure begin to appear.
MAINTENANCE
Subject to change without notice. Printed in U.S.A.
Copyright by York International Corporation 2004 All rights reserved.
035-11845-001-A-0304
Unitary
Products
Group
5005
York
Drive
Norman,
Oklahoma
73069
Supersedes: 515.41-N2W (194) / 035-11845-000