York E9FD018 Series User manual

GENERAL
This instruction covers the installation of the following outdoor
units: E1FD018A(S)06, E9FD018S06, E1FD024A(S)06,
E9FD024S06, E1FD030A(S)06, E9FD030S06,
E1FD036A(S)06, E9FD036S06, E1FD036S(25,46),
E1FD042A(S)06, E1FD048A(S)06 E1FD048S(25, 46),
E1FD060A(S)06, E1FD060S06(25, 46).
The outdoor units are designed to beconnectedto a matching
indoor coil with either quick or sweat connect lines. Quick
connect units are factory charged with refrigerant for a match-
ing indoor coil and factory charged line sets are available in
various lengths. Sweat connect units are factory charged with
refrigerant for a matching indoor coil plus 15 feet of field
supplied lines.
Matching indoor coils are available with a thermal expansion
valve or an orifice liquid feed (YORKMATE flowcontrol device)
sized for the most common usage. The orifice size and/or
refrigerant charge may need to be changed for some indoor-
outdoor unit combinations, elevation differences or total line
lengths. Refer to Application Data covering “General Piping
Recommendations and Refrigerant Line Length” (Form
690.01-AD1V).
THIS UNIT IS NOT EQUIPPED WITH A FILTER DRIER. A
SOLID CORE BI-FLOW DIRECTIONAL FILTER IS RE-
QUIRED FOR INSTALLATIONAND ANYTIME THE REFRIG-
ERANT CIRCUIT IS OPENED.
INSPECTION
Assoonasaunitisreceived,itshouldbeinspectedforpossible
damage during transit. If damage is evident, the extent of the
damage should be noted on the carrier’s delivery receipt. A
separate request for inspection by the carrier’s agent should
be made in writing. See Local Distributor for moreinformation.
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.
CAUTIONSidentifiesprocedurewhich,ifnotfollowedcarefully,
could result in personal injury, property damage or product
damage.
WARNINGSaregiventoalerttheinstallerthatseverepersonal
injury, death or equipment damage may result if installation
procedures are not handled properly.
NOMENCLATURE
LIMITATIONS
The unit should be installed in accordance with all national and
local safety codes.
Limitationsfortheindoorunit,coil and appropriateaccessories
must also be observed.
The outdoor unit must not be installed with any ductwork in the
air stream. The outdoor fan is the propeller type and is not
designedtooperateagainstanyadditionalexternalstaticpres-
sure.
OUTDOOR
SPLIT-SYSTEM HEAT PUMPS
Supersedes:Supersedes: 515.26-N5Y (995)
MODELS E1(9)FD018, 024, 030 and 036
E1FD042, 048 and 060
(See Detail Listing Below)
515.26-N5Y (296)
035- 13682
AIR TEMPERATURE °DB
ON OUTDOOR COIL AIR TEMPERATURE
ON INDOOR COIL
Min. Max. Min. Max.
Cool Heat Cool Heat °WB
Cool °DB Heat °WB Cool °DB Heat
50 -10* 115 75 57 50** 72 80
* If ambient will be below this, Accessory Kit 2LT06700224 must be installed to
cutoff heat pump.
** Operation below this temperature is permissible for a short period of time,
during morning warm-up.
TABLE 1 - APPLICATION LIMITATIONS
Voltage Code
Refrigerant Line Connections
Nominal Cooling Capacity
Product Category
Product Generation
Product Identifier
E = Outdoor Split System Heat Pump
1 = Design Level
9 = Canada
FDs = 10 SEER Heat Pump
018 = 1.5 Tons
024 = 2Tons
030 = 2.5Tons
036 = 3 Tons
042 = 3.5 Tons
048 = 4 Tons
060 = 5 Tons
A = Quick-Connect Fittings
S = Sweat Fittings
06 = 208/230-1-60
25 =208/230-3-60
46 = 460-3-60
E 1 FD 036
A
06
®
INSTALLATION INSTRUCTION

The maximum and minimum conditions for operation must be
observed to assure a system that will give maximum perform-
ance with minimum service.
LOCATION
Before starting the installation, select and check the suitability
of the location for both theindoor and outdoor unit. Observe all
limitations and clearance requirements, see Figure 3.
Theoutdoorunitmusthavesufficientclearanceforairentrance
to the condenser coil, for air discharge and for service access.
If the unit is to be installed on a hot sun exposed roof or a
black-toppedgroundarea, theunitshouldbe raisedsufficiently
abovethe roof or ground to avoidtaking the accumulated layer
of hot air into the outdoor unit.
Provide an adequate structural support.
The unit may be installed at ground level on a solid base that
will not shiftor settle,causing strainon the refrigerantlinesand
possible leaks. Maintain the clearances shown Figure 3 and
install the unit in a level position. Isolate the base from the
building structure to avoid noise or vibration transmission.
When installing units on a roof, the structure must be capable
ofsupportingthetotalweightoftheunit,includingapad,lintels,
rails, etc., which should be used to minimize the transmission
of sound or vibration into the conditioned space.
Isolate theunitfromraingutters to avoidany possible washout
of the foundation.
Normal operating sound levels may be objectionable if the unit
is placed directly under windows of certain rooms (bedrooms,
study, etc.).
Condensate will drain from beneath the coil of the outdoor unit
during the defrost cycle. Normally this condensate may be
allowed to drain directly onto the ground. Agravel bed may be
used to prevent mud splashing.
WARNING:The outdoor unit should not be installed in anarea
where mud or ice could cause personal injury.
Remember that condensate will drip from the unit
coils during heat and defrost cycles and that this
condensatewillfreezewhenthetemperatureofthe
outdoor air is below 32
° F.
Elevate the unit sufficiently to prevent any blockage of the air
entrances by snow in areaswhere there will be snow accumu-
lation. Check the local weather bureau for the expected snow
accumulation in your area.
INSTALLATION PROCEDURES
The following sequence of installation steps is suggested.
1. Inspect unit and set in place.
2. Make electrical power connections.
3. Check orifice size and replace with correct size if necessary.
4. Route the vapor and liquid lines.
5. Install liquid line filter drier. See “DRIER INSTALLATION”
6. Connect tubing and leak test.
7. Make electrical control connections.
8. Charge system.
9. Instruct owner.
DRIER INSTALLATION
NOTE: DRIERS ARE NOT SUPPLIED WITH THIS EQUIP-
MENT AND MUST BE FIELD INSTALLED AT THE
TIME OF EQUIPMENT INSTALLATION.
For new installations we recommend a 8 cubic inch minimum
solid core bi-flow filter-drier for 1- 3 tons, and a 10 cubic inch
minimum for 3.5 - 5 tons. Install in the liquid line, external to
the outdoor unit.
For clean-up after a burnout a larger capacity drier is recom-
mended. Always remove any driers on the unit at the time of
burnout. Driers should be replaced any time the refrigerant
circuitis repaired. When adding a drier to a system, additional
refrigerantmust be addedto compensate for the drier addition.
Refer to vendor specifications for the additional refrigerant
amount.
For a particular filter-drier brand, refer to Source 1 Manual or
originalmanufactor’srecommendedsize,additionalrefrigerant
charge requirements, connection size and type.
RUBBER
ELEVATING
GROMMETS
(4)
UNIT
BASE
PAN
Note: Do Not block drainage
holes with grommets.
FIGURE 1 - POSITIONING GROMMETS - "A" CUBE
RUBBER
ELEVATING
GROMMETS
(4)
UNIT
BASE
PAN
Note: Do Not block
drainage holes with
grommets.
FIGURE 2 - POSITIONING GROMMETS - "B" CUBE
515.26-N5Y
2Unitary Products Group

UNIT PLACEMENT
1. Provide a base in the pre-determined location.
2. Remove the shipping carton and inspect for possible dam-
age.
3. Compressor tie-down bolts should remain tightened.
4. Position the unit on the base provided.
5. Sit unit on the (4) rubber elevating grommets provided with
the unit. These should be positioned as shown in Figures
1 and 2 to reduce noise and allow for proper drainage.
6. Makeahole(s)inthestructure walllargeenoughtoaccom-
modate the insulated vapor line, the liquid line and the
wiring.
MODEL E*FD
018 024 030 036 042 048 060
UNIT SUPPLY VOLTAGE 208/230-1-60
NORMAL VOLTAGE RANGE1187 to 252
MIN. CIRCUITAMPACITY 12.3 15.3 19.3 23.2 27.2 33.1 36.1
MAX. OVERCURRENT DEVICE AMPS220 25 30 35 40 50 60
COMPRESSOR TYPE Recip. Recip. Inertia Inertia Inertia Scroll Scroll
COMPRESSOR AMPS RATED LOAD 9.2 11.6 14.8 17.3 20.5 25.2 27.6
LOCKED ROTOR 48 60 73 94 120 131 170
CRANKCASE HEATER YES YES YES YES YES NO NO
FAN MOTOR AMPS RATED LOAD 0.8 0.8 0.8 1.6 1.6 1.6 1.6
LOCKED ROTOR 1.9 1.9 1.9 3.8 3.5 3.5 3.5
MIN. FIELD WIRE SIZE AWG
60°C COPPER CONDUCTORS 14 12 12 10 10 8 8
MAX. WIRE LENGTH FEET BASED
ON 3% VOLTAGE DROP 208V 81 99 81 108 108 138 124
230V 90 110 90 120 120 153 138
FAN DIAMETER INCHES 18 18 18 18 24 24 24
FAN MOTOR RATED HP 1/8 1/8 1/8 1/4 1/4 1/4 1/4 NOMINAL RPM 1075 1075 1075 1075 860 860 860
NOMINAL CFM 2000 2000 2000 2200 3200 3200 3300
COIL FACE AREA SQ. FT. 14.2 15.1 15.1 17.0 20 20 24 ROWS DEEP 1 1 1 1 1 1 2
FIN / INCH 13 18 18 20 13 16 13
LIQUID LINE OD 3/8 3/8 3/8 3/8 3/8 3/8 3/8
VAPOR LINE OD 5/8 5/8 3/4 3/4 7/8 7/8 7/8
OPERATING WEIGHT LBS. 140 149 149 167 225 210 312
1Utilization range “A” in accordance with ARI standard 110. 2Dual element fuses or HACR circuit breaker. * May be 1 or 9.
TABLE 2 - PHYSICAL / ELECTRICAL DATA
MODEL E1FD036 E1FD048 E1FD060 E1FD036 E1FD048 E1FD060
25 46
UNIT SUPPLY VOLTAGE 208/230-3-60 460-3-60
NORMAL VOLTAGE RANGE1187 to 253 432 to 504
MIN. CIRCUIT AMPACITY 15.2 20.1 21.4 8.0 9.0 10.1
MAX. OVERCURRENT DEVICE AMPS225 30 40 15 15 20
COMPRESSOR TYPE Inertia Scroll Scroll Inertia Scroll Scroll
COMPRESSOR AMPS RATED LOAD 10.9 14.8 15.8 5.8 6.5 7.4
LOCKED ROTOR 78 91 124 40 46 59.6
CRANKCASE HEATER YES NO NO YES NO NO
FAN MOTOR AMPS RATED LOAD 1.6 1.6 1.6 0.8 0.8 0.8
LOCKED ROTOR 3.5 3.5 3.5 1.8 2.0 2.0
MIN. FIELD WIRE SIZE AWG
60°C COPPER CONDUCTORS 12 10 10 14 14 14
MAX. WIRE LENGTH FEET BASED ON
3% VOLTAGE DROP
208V 106 135 117 - - -
230V 117 150 130 - - -
460V - - - 261 240 200
FAN DIAMETER INCHES 18 24 24 18 24 24
FAN MOTOR RATED HP 1/4 1/4 1/4 1/4 1/4 1/4 NOMINAL RPM 1075 860 860 1075 860 860
NOMINAL CFM 2200 3200 3300 2200 3200 3300
COIL FACE AREASQ. FT. 17 20 24 17 20 24 ROWS DEEP 1 1 2 1 1 2
FIN / INCH 20 16 13 20 16 13
LIQUID LINE OD 3/8 3/8 3/8 3/8 3/8 3/8
VAPOR LINE OD 3/4 7/8 7/8 3/4 7/8 7/8
OPERATING WEIGHT LBS. 167 210 312 167 210 312
1Utilization range “A”in accordance with ARI standard 110. 2Dual element fuses or HACR circuit breaker.
TABLE 3 - PHYSICAL / ELECTRICAL DATA
515.26-N5Y
Unitary Products Group 3

ELECTRICAL CONNECTIONS
1. Check the electrical supply to be sure that it meets the
values specified on the unit nameplate and wiring label.
2. Removeproperlowvoltageknockout.Removeplasticsnap
bushing from instruction packet and insert in low voltage
knockout hole.
3. The complete connection diagram and schematicwiring label
is located on the inside surface ofthe unit electrical box cover.
Typical Field Wiring is shown in Figures 4 and 5.
4. All field wiring to be in accordance with national electrical
code (NEC) and/or local city codes.
NOTE: Power wiring, disconnect switch, and overcurrent pro-
tection to be supplied by installer. See Physical and
Electrical Data Table for proper sizes. USE COPPER
CONDUCTORS ONLY. Unit must be grounded with a
separate ground conductor wire.
5. Install theproper size weatherproof disconnect switch out-
doors and within sight of the unit.
6. Run power wiring from the disconnect switch to the unit.
7. Install the proper size time-delay fuses or circuit breaker,
and make the power supply connections.
8. Energize the crankcase heater, if applicable, to save time
bypreheatingthecompressoroilwhiletheremaininginstal-
lation is completed.
The crankcase heater, when furnished, is energized whenever
the compressor is not running. Check for proper operation by
feelingforheatonthecompressorwheretheheaterisinstalled.
The heater should be energizedfor at least 8 hours before the
thermostat is set to operate the compressor.
CAUTION: An attempt to start the compressor without at least
8 hours of crankcase heat will damage the com-
pressor.
A warning label with an adhesive back is supplied in the unit
installation instruction packet. Thislabel shouldbe attached to
thefieldsupplieddisconnectswitchwhereitwillbeeasilyseen.
See below:
TUBING CONNECTIONS
Sweat-connect systems must use field supplied, clean, dehy-
drated refrigeration-grade copper tubing.
Quick-connect systems must use pre-charged refrigerant line
sets (quick-connect couplings) designated for the respective
unit size. Pre-charged lines with excess tubing should be
coiled horizontally in an inconspicuous location to avoid oil
trapping.
IMPORTANT
035-03095A
IF POWER HAS BEEN OFF FOR 8 HOURS OR LONGER,
DISCONNECT SWITCH MUST BE TURNED ON 8 HOURS
BEFORE THERMOSTAT IS SET TO “HEAT”, “COOL” OR
“AUTO”.
24" SERVICE
ACCESS
CLEARANCE
WEATHERPROOF
DISCONNECT SWITCH
NEC CLASS 1
WIRING
TO
BLOWER
MOTOR
RELAY
NEC CLASS 2
WIRING
TO
INDOOR
COIL
SEAL
OPENING(S)
WITH
PERMAGUM OR
EQUIVALENT
THERMOSTAT
Sit unit on
rubber
elevator
grommets to
reduce noise
and allow for
proper
drainage.
Check local weather bureau for snow accumulation.
TO POWER
SUPPLY
NOTE: ALL OUTDOOR WIRING
MUST BE WEATHERPROOF
48" OVERHEAD
CLEARANCE
INSTALL BI-FLOW FILTER
DRIER IN LIQUID LINE
12" REAR
AND SIDES
FIGURE 3 - TYPICAL INSTALLATION
515.26-N5Y
4Unitary Products Group

GRD.
LUG
CONTACTOR
GRD.
SCREW
M
T1
L1
L2
OUTDOOR UNIT THERMOSTAT INDOOR UNIT
T2
POWER WIRING
208/230-1-60
POWER WIRING
24V CONTROL WIRING
(NEC CLASS 2)
CIRCUIT
Jumper terminals E and W to
heat on first stage during
Emergency Heat.
LOW VOLTAGE TERMINAL BLOCK
IN AIR HANDLER WITH ELECTRIC HEAT
Check the low voltage terminal block on the indoor unit for the actual arrangement of the terminals.
BREAKER***
ALL WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES
Connect power wiring to terminal block 3TB on units without electric heat or circuit breaker.
3,4
1
3
4
Terminal not used on all thermostats.
2
Y
O
W1 or 66
W
DEFROST
CONTROL
R
C
53 or W3
R
60 or W2
G
O
B or C
66 or W1
W
Y
R
O
G
W
Y
7 WIRES RED
NOT USED
ADD WHEN STAND-BY
HEATER IS USED
B or C
L or X
T
E
FIELD
INSTALLED
JUMPER
1
2
2
BLK
YEL
ORG
WHT
BRN
X
FIGURE 4 - TYPICAL 1-Ø FIELD WIRING (Air Handler / Electric Heat)
Y
O
W1 or 66
W
GRD.
LUG
DEFROST
CONTROL
CONTACTOR
GRD.
SCREW
M
R
C
53 or W3
R
60 or W2
G
O
B or C
66 or W1
W
Y
R
O
G
W
Y
7 WIRES
OUTDOOR UNIT THERMOSTAT INDOOR UNIT
POWER WIRING
208/230-3-60
460-3-60
POWER WIRING
24V CONTROL WIRING
(NEC CLASS 2)
LOW VOLTAGE TERMINAL BLOCK **
IN AIR HANDLER WITH ELECTRIC HEAT
**Check the low voltage terminal block
on the indoor unit for the actual
arrangement of the terminals.
ALL WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES
RED
NOT USED
ADD WHEN STAND-BY
HEATER IS USED
POWER
SUPPLY
208/230-3-60
460-3-60
B or C
L or X
Jumper terminals E and W to
heat on first stage during
Emergency Heat.
Terminal not used on
all thermostats.
T
E
FIELD
INSTALLED
JUMPER
1
1
2
2
2
BLK
YEL
ORG
WHT
BRN
X
FIGURE 5
- TYPICAL 3-Ø FIELD WIRING (Air Handler / Electric Heat)
515.26-N5Y
Unitary Products Group 5

Stubkits are available to field fabricate quick connectline sets
or to connect mix-matched units and coils.
Unit should be installed only with approved system combina-
tions (indoor coil/outdoor unit) specified in Technical Guide.
See Application Data,"General Piping Recommendations and
Refrigerant Line Length," for vapor and liquid line sizing, cal-
culation of liquid line pressure loss or gain, determination of
vapor line velocity, elevation limitations, orifice corrections,
system charging, traps, etc.
Total line lengths are limited to 75 feet due to the storage
capacity of the accumulator. Systems with total line lengths
over 50 feet must be provided with a low voltage start kit.
Elevation differences are limited to:
Indoor Above Outdoor........50 ft.
Outdoor Above Indoor........50 ft.
Systems with liquid line pressure loss or gain greater than 11
psi must be provided with corrected orifice size.
Inter-connecting refrigerant lines should be sized to match the
factorysuppliedfittings.LiquidlinesmustNEVER beincreased
or decreased. Vapor lines may be increased one size to mini-
mize pressure drop as long as a velocity of at least 1000 feet
per minute is maintained.
Additionalchargeisrequiredforinter-connectingpipinggreater
than 15 feet for sweat units and some indoor coil matches.
The lines should be installed so that they will not obstruct
service access to the coil, air handling system or filter. Install
the lines with as few bends as possible. Care must be taken
not to damage the couplings or kink the tubing. Care must also
be used to isolate the refrigerant lines to minimize noise
transmission from the equipment to the structure.
Tape and suspend the refrigerant lines as shown. DO NOT
allow metal-to-metal contact.
OUTDOOR UNIT E1FD / E9FD 018 024 030 036 042 048 060
UNIT ORIFICE(S)155, 57 59, 61 67, 69 75 81 84, 87 99
FACTORY R-22
CHARGE, LBS. OZ. SWEAT 4 - 11 5 - 15 6 - 6 6 - 9 7 - 6 7 - 9 15 - 5
QUICK 4 - 1 5 - 6 5 - 11 5 - 15 6 - 12 6 - 15 14 - 10
INDOOR COIL COIL
ORIFICE2 SYSTEM ORIFICE + ADDITIONAL CHARGE, OZ.
G3HC / G1FC018 55 55 + 2 59 + 0 - - - - -
G3HC / G1FC024 61 57 + 14 59 + 0 - - - - -
G3HC / G1FC030 69 61 + 16 69 + 0 - - - -
G3HC / G1FC036 81 - - 69 + 4 75 + 0 - - -
G3HC / G1FC042 78 - - - 75 + 13 81 + 3 - -
G3HC / G1FC048 90 ----81+1184+0-
G3HC / G1FC060 96 -----87+1999+0
G3US018 55 55 + 2 59 + 0 - - - - -
G3UA024 59 55 + 14 59 + 0 - - - - -
G3UA030 65 - 61 + 16 - - - - -
G3UA036 69 - 61 + 16 69 + 4 75 + 0 - - -
G3UA037 69 - 61 + 16 69 + 4 75 + 0 - - -
G3UA048 87 ----81+1184+0-
G3UA060 96 -----87+1999+0
G3UA061 96 -----87+1999+0
G2UT024 - - + 0 - - - - -
G2UT030 - - +16 - - - - -
G2UT036 - - +16 +4 +0 - - -
G2UT037 - - +16 +4 +0 - - -
G2UT048 - ----+11+0-
G2UT060 - -----+19-
G2UT061 - -----+19+0
G3CN030 65 57 + 14 61 + 16 69 + 0 - - - -
G3CN042 73 - - - 75 + 13 81 + 3 - -
G3CN060 87 -----87+1999+0
F1RP / F1FP018 53 55 + 0 - - - - - -
F1RP / F1FP024 61 57 + 6 61 + 0 - - - - -
F1RP / F1FP030 65 - 61 + 0 67 + 2 - - - -
F1RP / F1FP036 75 - - - 75 + 0 - - -
F1RP / F1FP042 78 - - - 75 + 2 78 + 0 - -
1These orfices are packed in the instruction/warranty packet of each outdoor unit.
2These orifices are factory-mounted in the flow control device of each indoor coil.
NOTE: Orifices in ( ) must be ordered from the Parts Department.
TABLE 4- ADDITIONALR-22 CHARGE/ORIFICE SIZE
LIQUID
LINE
TAPE
SHEET
METAL
HANGER
INSULATED
VAPOR LINE
FIGURE 6 - TUBING HANGER
515.26-N5Y
6Unitary Products Group

Use PVC piping as a conduit for all underground installations
as shown in Figure 7. Buried lines should be kept as short as
possible to minimize the build up of liquid refrigerant in the
vapor line during long periods of shutdown.
Pack fiber glass insulation and a sealing material such as
permagumaroundrefrigerantlineswheretheypenetrateawall
to reduce vibration and to retain some flexibility.
Insulate all vapor lines with a minimum of 1/2" foam rubber.
Liquid lines that will be exposed to direct sunlight and/or high
temperatures must also be insulated.
ORIFICE SELECTION
YORKMATE FLOW CONTROL COILS
NOTE: The proper orifice must be installed in the indoor coil
liquid connection prior to the connection of the refrig-
erant lines.
WARNING:Sweat coil is under 35 PSIG helium pressure.
Eachquickconnectcoilwillhaveanorificeinstalledinthefitting
between the liquid line connection and distributor. The orifice
is identified on a label next to the liquid connection as shown
in Figure 8.
Sweat coilsare shipped with a standard orifice in a plastic bag
attached to the liquid line connection.
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, and/or long total line lengths. An additional ori-
fice(s)isshippedwithmostoutdoorunitsintheliteraturepacket
for the most commonly required replacement combinations.
Other sizes must be ordered from the Parts Department if
required.
Table 4 shows the orifice and charge adjustment for approved
system combinations (indoor coil/outdoor unit). See Applica-
tion Data,"General Piping Recommendations and Refrigerant
Line Lengths" for long line lengths and elevation differences.
If the orifice sizes match, nothing further is required and the
refrigerantlinesmaybeconnectedpertheoutdoorunitinstruc-
tion. However, if another orifice should be used, see the coil
instruction for details to change the orifice in the coil.
QUICK CONNECT SYSTEMS
Indoor coils and outdoor units are to be connected with pre-
charged interconnecting tubing specified for the split systems.
The units and the lines are equipped with sealed one-time
quick-connect couplings which, when screwed together, will
have their seals broken, allowing for free passage of refriger-
ant.One end of thetubing contains afemalefittingfor connect-
ing to the outdoor unit. The other end has a male fitting with a
90°bend on the vapor line for connecting to the indoor coil.
The outdoor end of the lines have capped service (Schrader)
ports. Install the coupling in a position that will permit a
Schrader tool to be attached to the service port.
Prepare and connect fittings as follows:
1. Begin at either the indoor coil or the outdoor unit. Remove
only one dustcap at a time to avoiddamageand to prevent
dirt from getting into the other. If necessary, carefully wipe
seals and threaded surfaces with a clean cloth.
2. Lubricate the male half diaphragm and the “O” ring with
several drops of refrigerant oil. Thread the halves together
by hand to insure proper mating of the threads. Use proper
size wrenches (on both the body hex and onthe union nut)
and tighten until bodies “bottom” or a definite resistance is
felt.
3. Using a marker or ink pen, mark a line lengthwise from the
union nut to the unit panel. Then tighten an additional 1/4
turn (90°from the mark on the panel to the mark on the
union nut).
4. Repeat this procedure with the other three in the system,
removing the dust cap just prior to making the connection.
5. Leak test all refrigerant piping connections including the
service port flare caps to be sure they are leak tight.
DO NOT OVERTIGHTEN (between 40 and 60 inch-lbs.
maximum).
6. Do not remove the flare caps from the serviceports except
when necessary for servicing the system.
TO INDOOR COIL TO OUTDOOR UNIT
LIQUID LINE
CAP
PVC
CONDUIT
INSULATED
VAPOR LINE
FIGURE 7 - UNDERGROUND INSTALLATION
LABEL
LEFT-HAND THREAD
DISTRIBUTOR
ORIFICE
LIQUID LINE
FITTING
WITH #65
ORIFICE
COIL EQUIPPED
FIGURE 8 - ORIFICE LABEL
515.26-N5Y
Unitary Products Group 7

CAUTION: Do not connect manifold gauges unless trouble is
suspected. Approximately 3/4 ounce of refrigerant
will be lost eachtime a standard manifold gauge is
connected.
7. The quick connect outdoorunitcontainsenoughrefrigerant
charge for a matched indoor coil. Refer to Table 4 for the
amount of additional charge required for some mix-
matched indoor coils. If additional charge is required, see
recommended charging methods.
SWEAT-CONNECT SYSTEMS
The outdoor units have re-usable service valves on both the
liquid and vapor connections. The total system refrigerant
charge is retained within the outdoor unit during shipping and
installation. The re-usable service valves are provided to
evacuate and charge per this instruction.
Serious service problems can be avoided by taking adequate
precautions to assure an internally clean and dry system.
Always use refrigeration-grade copper tubing that is internally
cleananddryforrefrigerantlines.Usecleanharddrawncopper
tubing where no appreciable amount of bending around ob-
struction is necessary. If soft copper must be used, care must
be taken to avoid sharp bends which may cause a restriction.
The vapor line must be insulated with a minimum of 1/2 inch
insulation (Arm-A-Flex or equivalent).
CAUTION: Dry nitrogen should always be supplied through
the tubing while it is being brazed, because the
temperature required is high enough to cause oxi-
dation ofthe copper unless an inert atmosphere is
provided. The flow of dry nitrogen should continue
until the joint has cooled. Always use a pressure
regulator and safety valve to insure that only low
pressure dry nitrogen is introduced into thetubing.
Only a small flow is necessary to displace air and
prevent oxidation.
All outdoor unit andindoor coil connections are copper-to-cop-
per and should be brazed with a phosphorous-copper alloy
material such as Silfos-5 or equivalent. DO NOT use soft
solder.
BASE VALVE CONNECTION PRECAUTIONS
Precautions should be taken to prevent heat damage to the
fitting by wrapping a wet rag around it as shown in Figure 9.
Also,protectallpaintedsurfacesandinsulationduringbrazing.
After brazing - cool joint with wet rag.
WARNING:Thisisnotabackseatingvalve.Theserviceaccess
port has a valve core. Opening or closing valve
doesnotcloseserviceaccessport.SeeFigure10.
Valve can be opened by removing the plunger cap and fully
inserting a hex wrench into the stem and backing out counter-
clockwise until valve stem just touches retaining ring.
CAUTION: If visual verification ot the valve stem reachingthe
retaining ring is impossible, stop backing out the
valve stem when the slightest increase in resis-
tance is felt. Because of the small size and there-
fore the reduced resistance, back out the liquid
valve
5 turns maximum to prevent going past the
retaining ring.
WARNING: If the valve stem is backed out past the retaining
ring, the O’ring can be damaged causing leakage
or system pressure could force the valve stem out
of the valve body possibly causing personal injury.
In the event the retaining ring is missing, do not
attempt to open the valve.
Replaceplungercapfingertight,thentightenanadditional1/12
turn (1/2 hex flat). Cap must be replaced to prevent leaks.
LINE INSTALLATION
Install the refrigerant lines using the following procedure:
1. RemovethecapandSchradercorefromboththeliquidand
vapor fitting service ports at the outdoor unit. Connect low
pressure nitrogen to the liquid line service port.
2. Braze the liquid line to the liquid fitting at the outdoor unit.
Be sure to wrap the fitting body with a wet rag. Allow the
nitrogen to continue flowing.
3. Carefully remove the rubber plugs from the indoor coil
liquid and vapor connections. Use caution, since the coil is
pressurized. Release the gas through the schrader fitting
at the liquid connection before removing cap on vapor line.
4. Braze the liquid line to the indoor coil liquid connection.
The nitrogen should now be flowing through the coil.
5. Removethegrommetfromthevaporconnectionatthecoil.
Braze the vapor line to the indoor coil vapor connection.
After the connection has cooled, replace the grommet.
FIGURE 9 - HEAT PROTECTION
FIGURE 10 - SHUT-OFF VALVE
SERVICEACCESS
PORT WITH
SCHRADER
PLUNGER CAP
515.26-N5Y
8Unitary Products Group

6. Protect the vaporfitting with a wetrag and braze the vapor
line connection. The nitrogen flow should be exiting the
system from the vapor service port connection. After This
connection has cooled, remove the nitrogen source from
the liquid fitting service port.
7. Evacuate the vapor line, indoor coil and the liquid line. See
“EVACUATION” page 9.
NOTE: Do not use the system refrigerant in the outdoor unit
to purge or leak test.
8. Leak test all refrigerant piping connections including the serv-
ice port flare caps to be sure they are leak tight. DO NOT
OVERTIGHTEN (between 40 and 60 inch - lbs. maximum).
9. Do not remove the flare caps from the serviceports except
when necessary for servicing the system.
CAUTION: Do not connect manifold gauges unless trouble is
suspected. Approximately 3/4 ounce of refrigerant
will be lost eachtime a standard manifold gauge is
connected.
10.Release refrigerant charge into the system. Open both the
liquid and vapor fittings by removing the plunger cap and
with anallen wrench back outcounter-clockwise until valve
stem just touches retaining ring. See Base Valve Connec-
tion Precautions.
11. The sweat connect outdoor unit contains enough refriger-
ant charge for a matched indoor coil and 15 feetof tubing.
Refer to the Table 4 for the amount of additional charge
required for some mix-matched indoor coils. Additional
charge for lines longer than 15 feet is shown in Table 5. If
additional charge is required, see recommended charging
methods.
ROOM THERMOSTAT
Heat pump units must use one of the specific thermostats
approved for use with these heat pump systems. The cooling
and heating anticipators are non-adjustable in these thermo-
stats.
The thermostat should be located about 5 ft. above the floor,
where it will be exposed to normal room air circulation. Do not
place it on an outside wall or where it is exposedto the radiant
effect from exposed glass or appliances, drafts from outside
doors or supply air grilles.
Mountthethermostatandroutethe24-voltcontrol wiring(NEC
Class 2) from the thermostat to the indoor and outdoor units.
To eliminate erratic operation, seal the hole in the wall at the
thermostat with permagum or equivalent to prevent air drafts
affecting the anticipators in the thermostat.
Route the control wiring into the outdoor unit through the hole
provided. Connect the control wiring, see Figure 4 or 5 for
Typical Field Wiring.
EVACUATION
It will be necessary to evacuate the system if the unit has
developedaleakduringshipmentorwas,foranyotherreason,
opened to the atmosphere. If a leak is suspected, leak test to
locate the leak. Repair the leak and test again.
WARNING:Never attempt to repair any brazed connections
whilethesystemisunderpressure.Personalinjury
could result.
To verify if the system has no leaks, simply close the valve to
the vacuum pump suction to isolate the pump and hold the
system under vacuum. Watch the micron guage for a few
minutes.Ifthemicrongaugeindicatesasteadyandcontinuous
rise, it’s an indication of a leak. If the gauge shows a rise, then
levels off aftera few minutes and remains fairly constant,its an
indicationthatthesystemis leak free but still contains moisture
and may require further evacation if the reading is above 500
microns.
SYSTEM CHARGE
CAUTION: Refrigerant charging should onlybe carried out by
a qualified air conditioning contractor with proper
certification.
The factory charge in the outdoor unit is listed in Table 4 and
includes enough chargeforthe unitand a matchedindoorcoil.
Sweat connect units also include sufficient charge for 15 feet
of lines. Pre-charged line lengths are factory charged with the
correct amount of refrigerant required.
Sweat connect installations over 15 feet long and some indoor
coil matchesmay requiresomeadditional charge. Table5 lists
the amount of any additional refrigerant required.
The “TOTAL SYSTEM CHARGE” must be permanently
stamped on the unit data plate.
Total system charge is determined as follows:
1. Determine the outdoor unit charge from Table 4.
2. Determine indoor coil adjustment from Table 4.
3. Calculate the line charge with the factors in Table 5.
a) Calculate total length of pre-charged lines for quick
connect units.
b) Calculate over 15 feet of sweat lines for sweat connect
units.
NOTE: The charge for pre-charged lines should be included
inthesystemcharge shownonthedata platebutneed
not be added to the system. If sweat connect lines are
used, the line charge over 15 feet should be included
on the data plate and mustbe added to the system.
4. Total systemcharge = item1 + item 2 + item 3.
5. Permanentlystamptheunitdataplatewiththetotalamount
of refrigerant in the system.
LIQUID OD VAPOR OD R-22 CHARGE OZ./FT.
3⁄8”5⁄8“ 0.66
3⁄8”3⁄4” 0.68
3⁄8”7⁄8” 0.70
TABLE 5 - REFRIGERANT LINE CHARGES
515.26-N5Y
Unitary Products Group 9

Use the following charging method wheneveradditional refrig-
erant is required for the system charge.
MEASUREMENT METHOD
A calibrated charging cylinder or accurate weighing device
must be used to add refrigerant. This is the only accurate
charging method for heat pumps in the heat pump mode.
Check flare caps on service ports to be surethey are leak tight.
DO NOT OVERTIGHTEN (between 40 and 60 inch-lbs. maxi-
mum).
SYSTEM OPERATION
See Figure 11 to trace the flow of refrigerant through the
system.
WITH POWER TO UNIT AND THERMOSTAT IN COOLING
POSITION.
1. Reversing valve is energized through thermostat system
switchtopositionrefrigerantcircuitforcoolingoperation.In
the cooling cycle, discharge gas is pumped to the outdoor
coil which is the condenser. The indoor coil is the evapora-
tor.
2. If fan switch is in “ON” position, a circuit is made through
blower relay to provide continuous blower operation.
3. When thermostat cooling contact closes, a circuit is made
to energize contactor and start the system, if the compres-
sor has been off for 5 minutes. With fan switch in “AUTO”
position, a circuit is made from thermostat cooling contact
through blower relay to provide blower operation.
4. System will cycle with thermostat demand to provide cool-
ing as needed.
WITH POWER TO UNIT AND THERMOSTAT IN HEATING
POSITION
1. Reversing valve is de-energized to position refrigerant
circuitforheatingoperation.Intheheatingcycle,discharge
gas is pumped to the indoor coil which is the condenser.
The outdoor coil is the evaporator.
2. If fan switch is in “ON” position, a circuit is made through
blower relay to provide continuous blower operation.
3. When first stage of thermostat heating contact closes, a
circuit is made through the control to energize contactor
and start the system, if the compressor has been off 5
minutes. With fan switch in “AUTO” position, a circuit is
madefromthermostatheatingcontactthroughblowerrelay
to provide blower operation.
4. The system will cycle in response to thermostat signal to
provide heating as needed.
5. Supplemental electric heaters are energized by second
stage of heating thermostat.
FIGURE 11 - HEAT PUMP FLOW DIAGRAM
FLOW
CONTROL
DEVICE
(COOLING)
INDOOR
COIL
FIELD INSTALLED BI-FLOW LIQUID STRAINER / DRYER
COMPRESSOR
4-WAY REVERSING VALVE*
SUCTION
ACCUM.
OUTDOOR
COIL
COOLING CYCLE FLOW
HEATING CYCLE FLOW
*SHOWN IN
COOLING
POSITION
FIELD CONNECTED LINE
FIELD CONNECTED LINE
FLOW CONTROL DEVICE (HEATING)
515.26-N5Y
10 Unitary Products Group

SEQUENCE OF OPERATION
COOLING:
On call for cooling, the thermostat makes 24V circuits: R to O,
RtoY, andRtoG.Circuit Rto O energizesthereversingvalve,
switching it to cooling position. Circuit R to Y energizes the
contactor, starting outdoor fan motor and compressor circuit.
RtoGenergizestheindoorunitblowerrelay,startingtheindoor
blower motor.
HEATING:
On call for heating, thermostat makes circuits R to Y and R to
G.CircuitRtoYenergizescontactor,startingoutdoorfanmotor
and compressor. Circuit R to G energizes the indoor blower
relay, starting the blower motor.
Shouldthetemperaturecontinuetofall,RtoWismadethrough
the second stage of the thermostat. Circuit R to W energizes
the supplemental electric heat. The field-installed option out-
door thermostat can be used to turn on only the first stage of
electric heat if the temperature is above the setting tempera-
ture. Ifgas/propanefurnaceisusedas thesupplemental heat,
add-on control kit (2AC02700701) must be used. See the
add-oncontrol installation instructionfor thesystemoperation.
EMERGENCY HEAT:
When switch on thermostat is placed in emergency heat position:
1. Emergency light is energized.
2. Compressor circuit is locked out.
3. Supplemental and standby heaters (if installed) will be
controlled by first stage of heating thermostat.
4. Indoor blower will operate on demandforheat and cycle off
with the last heater element when in “AUTO” position.
SAFETY LOCKOUT MODE:
The lock out control opens the circuits to the compressor
contactor, stoppingthecompressorinresponseto(400#)High
Pressure limit switch opening for more than one second. The
compressor will remain off, even though the limits close and
will startup onlywhen the lockout isreset.Since there isno“X”
output on this control, no malfunction indication lightwill illumi-
nate on the thermostat. To reset the lockout, turn the indoor
thermostat’s system switch to “OFF” then, back to theselected
mode within 5 second OR disconnect the power to the trans-
former for at least two seconds. Please note that thermostats
with anti-short cycle timers will onlybe able to reset by discon-
necting the power to the transformer for at least two seconds.
DEFROST:
The defrost control is a time/temp control which includes a
field-selectable (white tap located at board edge) time period
between defrost cycle (30, 60, and 90 minutes).Factory set at
60 minutes.
The electronic timer and the defrost cycle will start only when
thecontactorisenergizedandthedefrostthermostatisclosed.
The defrost thermostat is closed when the liquid temperature
falls below approximately 31°F.
The defrost mode is identical to the cooling mode except that
the outdoor fan motor stops and the first stage of heat (5KW if
electric heat) is turned on through W1 / 66 to continue
warming the conditioned space.
The defrost cycle will be terminated when the defrost thermo-
stat is opened at 60°F or 10 minutes of compressor accumu-
lated run time, whichever comes first. Note: The defrost
thermostatdelaywillmakethecoiltemperatureabout75-80°F.
Please note that the timer will stop the circuit when R to Y is
disconnected.
TEST PIN:
The “TEST” terminals are designed for defrost test. When the
“TEST”terminalsareshortedtogether,thecontrolwillallowthe
unit to go into a defrost cycle if the compressor is operating.
Whentheshortisremoved,theheatpumpwillremainindefrost
untilthedefrost thermostatisopenor10minutesexpires.Ifthe
thermostat is open when the short is removed, the heat pump
will exit defrost.
FIGURE 12 - TIME / TEMPERATURE DEFROST BOARD
TEST
W
W1/66
YO
90
C
RUN TIME
90
60
30
60
30
SEL MIN
U1
COND FAN
K2
K3
R2
K1
HIGH VOLTAGE
PRESSURE
SWITCH
REVERSING
VALVE
DEFROST
STAT
C C
COMPRESSOR
RELAY
C
R
RTIME
SELECTION
TAP
DEFROST
TEST
PIN
M
THERMOSTAT
515.26-N5Y
Unitary Products Group 11

INSTRUCTING THE OWNER
Assist owner with processing warranty cards. Review User’s
InformationManualandprovidea copyfortheownerguidance
onproperoperationandmaintenance.Instructtheownerorthe
operator how to start, stop andadjust temperature setting. The
owner should also be instructed about the 5 minute off cycle
timer and the defrost operation.
When applicable, instruct the owner that the compressor is
equipped with a crankcase heater to prevent the migration of
refrigerant to the compressor during the “OFF” cycle. The
heaterisenergizedonlywhentheunitisnotrunning.Ifthemain
switch is disconnected for long periods of shut down, do not
attempt to start the unit for 8 hours after the switch has been
connected. This will allowsufficient time for all liquidrefrigerant
to be driven out of the compressor.
Theinstallershouldalsoinstructtheowneronproperoperation
and maintenance of all other system components.
INDICATIONS OF PROPER OPERATION
COOLING
Cooling operation is the same as any conventional air condi-
tioning unit.
1. The outdoor fan should be running, with warm air being
discharged from the top of the unit.
2. Theindoor blower(furnace orairhandler) willbeoperating,
discharging cool air from the ducts.
3. The vapor line at theoutdoor unitwill feel cool to the touch.
4. Theliquidline attheoutdoorunitwillfeelwarmtothetouch.
HEATING
Indications of proper Heating operation is as follows:
1. The outdoor fan should be running, with cool air being
discharged from the top of the unit.
2. Theindoor blower(furnace orairhandler) willbeoperating,
discharging warm air from the ducts.
3. Thevaporlineattheoutdoorunitwillfeelwarmtothetouch.
4. The liquid line at the outdoor unit will feel cool to the touch.
NOTICE TO OWNER:
If lockout occurs, check the following before calling a serviceman:
1. Indoor section for dirty filter.
2. Outdoor section for snow accumulation.
3. Outdoor section for leaf or debris blockage.
Eliminateproblem,turnoffthethermostatfor10secondsandattempt
start. Wait 5 minutes. If system does not start, call serviceman.
MAINTENANCE
1. Dirt should not be allowed to accumulate on the outdoor
coils or other parts in the air circuit. Clean as often as
necessary to keep the unit clean. Use a brush, vacuum
cleaner attachment, or other suitable means.
2. The outdoor fan motor is permanently lubricated and does
not require periodic oiling.
3. If the coil needs to be cleaned, 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.
4. Refer to the furnace or air handler instructions for filter and
blower motor maintenance.
5. The indoor coil drain pan should be inspected andcleaned
regularly to prevent odors and assure proper drainage.
CAUTION: IT IS UNLAWFUL TO KNOWINGLY VENT, RE-
LEASE OR DISCHARGE REFRIGERANT INTO THE OPEN
AIR DURING REPAIR, SERVICE, MAINTENANCE OR THE
FINAL DISPOSAL OF THIS UNIT.
WHEN THE SYSTEM IS FUNCTIONING PROPERLY AND
THE OWNER HAS BEEN FULLY INSTRUCTED, SECURE
THE OWNER’S APPROVAL.
Unitary Products Group
P.O. Box 1592, York, Pennsylvania USA 17405-1592
Subject to change without notice. Printed in U.S.A.
Copyright  by York International Corporation 1996. All Rights Reserved. SHU 12M 296 .66 Code: SBY 515.26-N5Y