York E1FD018 Series, E9FD030 Series, E9FD024 Series, E1FD024 Series, E1FD030 Series Installation Instruction

515.26-N5Y (296)

A

06

®

OUTDOOR

SPLIT-SYSTEM HEAT PUMPS

INSTALLATION INSTRUCTION

MODELS E1(9)FD018, 024, 030 and 036

GENERAL

This instruction cov ers the insta llation of the f ollowing o ut door
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, E1FD060S0 6(2 5, 46).

The outdoor units are designed to be c onnected t o a matchin g
indoor coil with either quick or sweat connect lines. Quick
connect units a re fac to ry char ged w ith ref rig era nt for a m atch­ing indoor coil and factory charged line sets are available in
various lengths . Sweat connect unit s are fa ctory char ged wit h
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 (YORKMA TE f low control device)
sized for the most common usage. The orifice size and/or
refrigerant charge may need to be changed for some indoor­outdoor 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 RE­QUIRED FOR INS T ALLATIO N AND ANY TIME T HE REFRIG­ERANT CIRCUIT IS OPENED.

INSPECTION

As soon as a unit is rece ived, it sho uld be inspected for possible
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 D istributor for more info rmation.

REFERENCE

Use this instruction in conjunction with the instructions for the
appropriat e indoor unit, air moving sys te m and acce ssor ies.

Supersedes: Supersedes: 515. 26-N5Y (995)

E1FD042, 048 and 060

(See Detail Listi ng Bel ow)

Installer should pay particular attention to the words:

CAUTION
NOTES

CAUTIONS identifies p rocedure which, if not followed carefully ,
could result in personal injury, property damage or product
damage.

WARNINGS ar e given to alert the installer that severe pe rsonal
injury, death or equipment damage may result if installation
procedures are not handled properly.

NOMENCLATURE

Product Category

Product Generation

Product Identifier

Nominal Cooling Capacity

Refrigerant Line Connections

V oltage Code

LIMITATIONS

The unit shou ld b e instal led in accor dan ce with all nat ional an d
local safety codes.

Limitations for the indoor unit, coil and appropriate accessor ies
must also be obser ved.

The outdoor unit m ust no t be ins talled with any duct work in th e
air stream. The outdoor fan is the propeller type and is not
designed to oper ate against any additional external stat ic pres­sure.

T ABL E 1 - A PPLICATION LIMITATIONS

* 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.

are intended to clarify or make the inst allat ion eas ier.

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

A = Quick-Connect Fittings
S = Sweat Fittings

06 = 208/230-1-60
25 =208/230-3-60
46 = 460-3-60

AIR TEMPERATURE °DB

ON OUTDOOR COIL
Min. Max. Min. Max.

Cool Heat Cool Heat

50 -10* 115 75 57 50** 72 80

and

WARNING.

042 = 3.5 Tons
048 = 4 Tons
060 = 5 Tons

AIR TEMPERATURE

ON INDOOR COIL

°WB
Cool

035 - 13682

E 1 FD 036

°DB

Heat

°WB
Cool

NOTE,

°DB

Heat

515.26-N5Y

The maximum and minimum conditions f or operation m ust be
observed to assu re a system tha t will give maximum perform­ance with minimum service .

LOCATION

Before starting the inst allat ion, select and check the su itab ility
of the location for both the indoor and outdoor unit. Observe all
limitations and cleara nce r equir em ent s, see Figu re 3.

5. Install liquid line filter drier. See “DRIER INSTALLA TI O N”

6. Connect tubing and leak test.

7. Make electrical control connect ions.

8. Charge system.

9. Instruct owner.

DRIER INSTALLATION

The outdoor un it must have suff icient clearance for a ir entrance
to the condenser coil, for air disch arge and for service access.

If the unit is to be installed on a hot sun exposed roof or a
black-topped g round area , the unit should be raised sufficient ly
above the roof or ground to avoid taking the accum ulated layer
of hot air into the outdoor unit.

Provide an adequate structur al supp ort.
The unit may be installed at ground level on a solid base that

will not shift or settle, caus ing strain on the r efrigeran t lines and
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 vibratio n transmiss io n.

When instal ling units on a roof, the stru ct ure must be capa bl e
of supporting the total we ight of the unit, including a pad, lintels,
rails, etc., which should be used to minimize the transmission
of sound or vibration into the cond itione d space.

Isolate the unit from rain gut ters to av oid any possible wa sh out
of the foundation.

Normal operat ing sound levels may be objec tionable if the unit
is placed directly under windows of cert ain room s (bedr oom s,
stud y, etc. ).

Condensate will drain from beneath t he coil of the outdoor unit
during the defrost cycle. Normally this condensate may be
allowed to drain directly onto the ground. A gravel bed ma y be
used to prevent mud splash ing.

NOTE: DRIERS ARE NOT SUPPLIED WITH THIS EQUIP-

MENT AND MUST BE FIELD INSTALLED AT THE
TIME OF EQUIPMENT INSTALLAT ION.

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 outdo or un it.

For clean-up after a burnout a larger capacity drier is recom­mended. Always remove any driers on the unit at the time of
burnout. Driers should be replaced any time the refrigerant
circuit is re paired. When adding a drier to a system, additional
refrigerant mu st be added to comp ensate 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
original manuf actor’s recommended size, additional re frigerant
charge requirem ent s, con nect ion size and type.

UNIT
BASE
PAN

RUBBER
ELEVATING
GROMMETS
(4)

WARNING:The outdoor unit should not be installed in an area

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
condensate will fre eze when the t emperature of the

°

outdoor air is below 32

F.

Elevate the unit sufficiently to prevent any blockage of the air
entrances by s now in areas wher e there w ill be snow accum u­lation. Check the local weather bureau for the expected snow
accumulatio n in your area .

INSTALLATION PROCEDURES

The following sequence of instal lation steps is suggested.

1. Inspect unit and set in pla ce.

2. Make electrical power connections.

3. C heck orifice si ze and replace with correct size if necessary.

4. Route the vapor and liquid line s.

2 Unitary Products Group

Note:

Do Not block drainage

holes with grommets.

FIGURE 1 - POSITIONING GROMMETS - "A" CUBE

UNIT
BASE
PAN

RUBBER
ELEVATING
GROMMETS
(4)

Do Not block

Note:
drainage holes with
grommets.

FIGURE 2 - POSITIO NING GROM METS - "B" CUBE

515.26-N5Y

T ABL E 2 - PHYSICA L / ELECTRICA L DATA

MODEL

UNIT SUPPLY VOLTAGE 208/230-1-60
NORMAL VOLTAGE RANGE
MIN. CIRCUIT AMP ACITY 12.3 15.3 19.3 23.2 27.2 33.1 36.1
MAX. OVERCURRENT DEVICE AMPS
COMPRESSOR TYPE Recip. Recip. Inertia Inertia Inertia Scroll Scroll

COMPRESSOR AMPS
CRANKCASE HEATER
FAN MOTOR A MPS
MIN. FIELD WIRE SIZE AWG

60°C COPPER CONDUCTORS
MAX. WIRE LENGTH FEET BASED

ON 3% VOLTAGE DROP
FAN DIAMETER INCHES 18 18 18 18 24 24 24

FAN MOTOR

FACE AREA SQ. FT. 14.2 15.1 15.1 17.0 2 0 20 24

COIL

LIQUID LINE OD
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

1

Utilization range “A” in accordance with ARI standard 110. 2Dual element fuses or HACR circuit breaker. * May be 1 or 9.

ROWS DEEP 1 1 1 1 1 1 2
FIN / INCH 13 18 18 20 13 16 13

1

2

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

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

208V 81 99 81 108 108 138 124
230V 90 110 90 120 120 153 138

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

018 024 030 036 042 048 060

20 25 30 35 40 50 60

YES YES YES YES YES NO NO

14 12 12 10 10 8 8

2000 2000 2000 2200 3200 3200 3300

3/8 3/8 3/8 3/8 3/8 3/8 3/8

E*FD

187 to 252

TABLE 3 - PHYSICAL / ELECTRICAL DATA

MODEL

UNIT SUPPLY VOLTAGE 208/230-3-60 460-3-60
NORMAL VOLTAGE RANGE
MIN. CIRCUIT AMPACITY
MAX. OVERCURRENT DEVICE AMPS
COMPRESSOR TYPE Inertia Scroll Scroll Inertia Scroll Scroll

COMPRESSOR AMPS
CRANKCASE HEATER YES NO NO YES NO NO
FAN MOTOR A MPS
MIN. FIELD WIRE SIZE AWG

60°C COPPER CONDUCTORS
MAX. WIRE LENGTH FEET BASED ON

3% VOLTAGE DROP
FAN DIAMETER INCHES 18 24 24 18 24 24

FAN MOTOR

FACE AREA SQ. FT. 17 20 24 17 20 24

COIL

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

1

Utilization range “A” in accordance with ARI standard 110. 2Dual element fuses or HACR circuit breaker.

ROWS DEEP 1 1 2 1 1 2
FIN / INCH 20 16 13 20 16 13

1

2

RATED LOAD 10.9 14.8 15.8 5.8 6.5 7.4
LOCKED ROTOR

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

208V 106 135 117 - - ­230V 117 150 130 - - ­460V - - - 261 240 200

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

E1FD036 E1FD048 E1FD060 E1FD036 E1FD048 E1FD060

25 46

187 to 253 432 to 504

15.2 20.1 21.4 8.0 9.0 10.1
25 30 40 15 15 20

78 91 124 40 46 59.6

12 10 10 14 14 14

UNIT PLACEMENT

1. Provide a base in the pre-determin ed locat ion.

2. Remove the shipping carton and inspect for possible da m­age.

3. Compressor tie-down bolt s should remain tig ht ened .

4. Position the unit on the base provided.

Unitary Products Group 3

5. Sit unit on the (4) rub ber elevating gr ommets provided wit h
the unit. These should be positioned as shown in Figures
1 and 2 to reduce noise and allow for pro per draina ge.

6. Make a hole(s) in the str ucture w all la rge enough to accom­modate the insulated vapor line, the liquid line and the
wiring.

515.26-N5Y

ELECTRICAL CONNECTIONS

1. Check the electrical supply to be sure that it meets the
values specified on the unit na meplat e and wiring label.

2. Remove proper low voltage knockout. Remove plast ic snap
bushing from instruction packet and insert in low voltage
knockout hole.

3. The com plete connection diagram and schematic wiring label
is located on the inside surface of the unit electrical box cover .
Typical Field W iring 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.

feeling for he at on the co mpressor w here the heater is installed.
The heater should be energized f or at least 8 hours befor e the
thermost at is set to op e rat e the co mpressor.

CAUTION: An attempt to st art t he c ompre ssor without a t least

8 hours of crankcase heat will da mage the com ­pressor.

A warning label with an adhesive back is supplied in the unit
installation inst ruction packe t. This label should be att ached to
the field supplied disconne ct switch where it will be easily seen.
See below:

NOTE: Power wiring, discon nect switch, and o ver curren t 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 the proper size weather proof disconnect switch out­doors 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 connect ions.

8. Energize the crankcase heater, if applicable, to save time
by preheating the compressor oil while the remaining insta l­lation is complet ed.

The crankcase heat er , when f urnished , is e ner gized whenever
the compressor is not running. Check for proper operation by

THERMOSTAT

WEATHERPROOF
DISCONNECT SWITCH

NEC CLASS 1
WIRING

TO
BLOWER
MOTOR
RELAY

TO POWER
SUPPLY

IMPORTANT

IF POWER HAS BEEN OFF F OR 8 HOURS OR LONGER,
DISCONNECT SWITCH MUST BE TURNED ON 8 H OURS
BEFORE THERMOSTAT IS SET TO “HEAT”, “COOL” OR
“AUTO”.

035-03 095A

TUBING CONNECTIONS

Sweat-connect systems must use field supplied, clean, dehy­drated refrigerat ion-g rad e copp er 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.

INSTALL BI-FLOW FILTER
DRIER IN LIQUID LINE

48" OVERHEAD
CLEARANCE

12" REAR
AND SIDES

TO
INDOOR
COIL

NOTE: ALL OUTDOOR WIRING
MUST BE WEATHERPROOF

NEC CLASS 2
WIRING

FIGURE 3 - TYPICAL INSTALLATI ON

4 Unitary Products Group

SEAL
OPENING(S)
WITH
PERMAGUM OR
EQUIVALENT

Sit unit on
rubber
elevator
grommets to
reduce noise
and allow for
proper
drainage.

24" SERVICE
ACCESS
CLEARANCE

Check local weather bureau for snow accumulation.

ALL WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES

FIGURE 5

- TYPICAL 3-Ø FIELD WIRING (Air Handler / Electric Heat)

THERMOSTAT

R

B or C

Y

O

W

L or X

G

2

T

2

E

ADD WHEN STAND-BY
HEATER IS USED

7 WIRES

1

FIELD
INSTALLED
JUMPER

LOW VOLTAGE TERMINAL BLOCK
IN AIR HANDLER WITH ELECTRIC HEAT

R

B or C

Y

O

60 or W2

X

G

66 or W1

W

53 or W3

INDOOR UNIT

3,4

NOT USED

RED

BLK
YEL

ORG

BRN

WHT

DEFROST
CONTROL

R

C

Y

O

W

W1 or 66

OUTDOOR UNIT

CONTACTOR

T2

L2

T1

M

L1

515.26-N5Y

GRD.
SCREW

1

Jumper terminals E and W to
heat on first stage during
Emergency Heat.

2

Terminal not used on all thermostats.

FIGURE 4

THERMOSTAT

R

B or C

Y

O

W

L or X

G

T
E

ADD WHEN STAND-BY
HEATER IS USED

1

Jumper terminals E and W to
heat on first stage during
Emergency Heat.

2

Terminal not used on
all thermostats.

GRD.
LUG

CIRCUIT
BREAKER***

POWER WIRING
24V CONTROL WIRING

(NEC CLASS 2)

3

Check the low voltage terminal block on the indoor unit for the actual arrangement of the terminals.

4

Connect power wiring to terminal block 3TB on units without electric heat or circuit breaker.

- TYPICAL 1-Ø FIELD WIRI NG (Air Handler / Electric Heat)

ALL WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES

INDOOR UNIT

LOW VOLTAGE TERMINAL BLOCK **
IN AIR HANDLER WITH ELECTRIC HEAT

7 WIRES

1

FIELD

2

INSTALLED
JUMPER

2

GRD.
LUG

R

B or C

Y

O

60 or W2

X

G

66 or W1

W

53 or W3

NOT USED

POWER

SUPPLY

208/230-3-60

460-3-60

DEFROST
CONTROL

RED

R

BLK

C

YEL

Y

ORG

O

BRN

W

WHT

W1 or 66

**Check the low voltage terminal block
on the indoor unit for the actual
arrangement of the terminals.

POWER WIRING

208/230-1-60

OUTDOOR UNIT

CONTACTOR

M

POWER WIRING

208/230-3-60

460-3-60

POWER WIRING

24V CONTROL WIRING
(NEC CLASS 2)

GRD.
SCREW

Unitary Products Group 5

LIQUID
LINE

TAPE

SHEET
METAL
HANGER

INSULA T ED
VAPOR LIN E

515.26-N5Y

Stub kits are available to field fab ricate quic k connect line sets
or to connect mix-mat ch ed unit s and coi ls.

mize pressure drop as long as a velocity of at least 1000 feet
per minute is maintained.

Unit should be installed only with approved system combina­tions (indoor coil/ou td oor unit) specified in Technica l Guid e.

See Application Data,"G ener al Piping Recom me ndat ions and
Refrigerant Line Length," for vapor and liquid line sizing, cal­culation of liquid line pressure loss or gain, determination of
vapor line velocity, elevation limitations, orifice corrections,
system charg ing, traps, etc.

Additional charge is required f or inter-connecting piping greater
than 15 feet for sweat units and so me indoor coil matche s.

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 dama ge th e couplings or kin k the t ubing. Car e must a lso
be used to isolate the refrigerant lines to minimize noise

transmission f rom the equ ip ment to the str uct ur e.
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 pr ovided with a low voltage st art kit.

Tape and suspend the refrigerant lines as shown. DO NOT

allow metal-to-metal con tact .
Elevation dif feren ces ar e l imited t o:

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 cor re cted or ifice size .

Inter-connect ing refrig erant lines shou ld be sized to match the
factory supplied fitt ings. Liquid lines must
or decreased. Vapor lines

may be increased one size to mini-

NEVER be increased

FIGURE 6 - TUBING HANG ER

T ABL E 4- ADDI T IONAL R-22 CHARGE/ORIFI CE SIZ E

OUTDOOR UNIT E1FD / E9FD
UNIT ORIFICE(S)
FACTORY R-22

CHARGE, LBS. OZ.

INDOOR COIL

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 + 0­G3HC / 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 + 0­G3UA060 96 -----87 + 1999 + 0
G3UA061 96 -----87 + 1999 + 0
G2UT024 - - + 0 - - - - ­G2UT030 - - +16 - - - - ­G2UT036 - - +16 +4 + 0 - - ­G2UT037 - - +16 +4 + 0 - - ­G2UT048 - ----+ 11+ 0­G2UT060 - -----+ 19­G2UT061 - -----+ 19+ 0
G3CN030 6 5 57 + 14 61 + 16 69 + 0 - - - ­G3CN042 7 3 - - - 75 + 13 81 + 3 - -

G3CN060 8 7 -----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 - -

1

These orfices are packed in the instruction/warranty packet of each outdoor unit.

2

These orifices are factory-mounted in the flow control device of each indoor coil.

NOTE: Orifices in ( ) must be ordered from the Parts Department.

1

SWEA T 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

COIL

ORIFICE2

018 024 030 036 042 048 060

55, 57 59, 61 67, 69 75 81 84, 87 99

SYSTEM ORIFICE + ADDITIONAL CHARGE, OZ.

6 Unitary 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.

TO INDOOR COIL

LIQUID LINE

PVC
CONDUIT

INSULATED
VAPOR LINE

TO OUTDOOR UNIT

CAP

FIGURE 7 - UNDERGROUND INSTALLATION

515.26-N5Y

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 ori­fice(s) is shippe d with most outdoor units in the lit erature packet
for the most commonly required replacement combinations.
Other sizes must be ordered from the Parts Department if
required.

Table 4 shows the orifice and charg e ad ju stme nt for appr ove d
system combinations (indoor coil/outdoor unit). See Applica­tion Data,"General Piping Recommendations and Refrigerant
Line Lengths" for long line length s and elevat ion dif f erence s.

If the orifice sizes match, nothing further is required and the
refrigerant lines may be connect ed per the outdoor unit instruc­tion. However, if another orifice should be used, see the coil
instruction fo r details t o change t he or ifice in the coil.

Pack fiber glass insulation and a sealing material such as
permagum ar ound refrigerant lines where they penetrate a wall
to reduce vibration and to retain som e 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
temperat ure s 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 refrig­erant lines.

WARNING:Sweat coil is under 35 PSIG helium pressure .

Each quick conne ct coil will have an orifice ins talled in the fitting
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 coils are shipped with a standar d orifice in a plastic ba g
attached to the liquid line connect ion.

LABEL

DISTRIBUTOR

COIL EQUIPPED

WITH #65

ORIFICE

ORIFICE

QUICK CONNECT SYSTE MS

Indoor coils and outdoor units are to be connected with pre­charged inter conn ect ing t ub in g specif ie d for the s p lit syst em s.
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 refriger­ant. One end of the tubing con tains a female fitt ing for connec t­ing to the outdoor unit. The oth er end has a male fitting wit h a
90° bend on the vapor line for connect in g 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 atta ched to the service port.

Prepare and connec t fittings as follows:

1. Begin at either the indoor c oi l or th e outdoor unit. Remove
only one dust cap at a time to avo id damage and to p revent
dirt from getting into the other. If necessary, carefully wipe
seals and threaded surfac es with a clean clot h.

2. Lubricate the male half diaphragm and the “O” ring with
several drops of refrig erant oil. Thread the halv es together
by hand to insure proper mat ing of the thr eads. Use proper
size wrenches (on b oth the body hex and on th e union nu t)
and tighten until bod ies “bo ttom ” or a definit e r esist anc e 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).

LEFT-HAND THREAD

FIGURE 8 - ORIFICE LABEL

Unitary Products Group 7

LIQUID LIN E
FITTING

4. Repeat this procedure with the other three in the system,
removing the dus t cap just prior to m aking th e connect ion.

5. Leak test all refrigerant piping connections including the
service port flar e cap s to be sur e th ey ar e leak t ig ht .

DO NOT OVERTIGHTEN (between 40 and 60 inch-lbs.
maximum).

6. Do not remove the f lare caps f rom the ser vice ports except
when necessary for servicing the sy stem .

515.26-N5Y

CAUTION: Do not connect manifold gauges unless trouble is

suspected . Approximat ely 3/4 ounce of refriger ant
will be lost each time a standard manif old gauge is
connected .

WARNING: This is not a bac kseating valve. The service a ccess

port has a valve core. Opening or closing valve
does not close service ac cess port . See Figure 10.

7. The quick connect ou tdoor un it conta ins enou gh re frigerant
charge for a matched indoor coil. Refer to Table 4 for the
amount of additional charge required for some mix­matched indoor coils. If additional charge is required, see
recommende d char ging met hod s.

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 an d charge p e r this inst ruc tion .

Serious service problems can be avoided by taking adequate
precautions to assure an int er nally clean an d dry system .

Always use refrigeration -gr ade copper tubing that is inter nally
clean and dry for refrigerant lines. Use clean ha rd drawn copper
tubing where no appreciable amount of bending around ob­struction is necessar y. 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 equivale nt).

CAUTION: Dry nitrogen should always be supplied through

the tubing while it is being brazed, because the
temperature re quire d is hig h en ough to cause ox i­dation of the copper un less an inert atmos phere 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 n itrogen is int rod uced int o the tu bing.
Only a small flow is necessary to displace air and
prevent oxidatio n.

All outdo or unit a nd indoor co il con nections are cop per-to- cop­per 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, protect all painted surfaces and insulat ion during brazing.
After brazing - cool join t with wet rag.

SERVICE ACCESS
PORT WITH
SCHRADER

PLUNGER CAP

FIGURE 10 - SHUT-OFF VALVE

Valve can be opened by removing the plunger cap and fully
inserting a hex wre nch int o the st em and bac king o ut count er­clockwise unti l valve stem just touc hes ret aining ring .

CAUTION: If visual ver ification ot t he v alve s tem reaching th e

retaining ring is impossible, stop backing out the
valve stem when the slightest increase in resis­tance is felt. Because of the small size and there­fore the reduced resistance, back out the liquid

5 turns maximum

valve
retainin g ring.

WARNING: If the valve stem is backed out past the retaining

ring, the O’ring can be damaged causing leakage
or system pre ssur e c ould f or ce th e valv e stem out
of the valve body possibly caus ing persona l injury .
In the event the retaining ring is missing, do not
attempt to open the valve.

Replace plunger cap finger tight , then tighten an additional 1 /12
turn (1/2 hex flat). Cap must be replaced to prevent leaks.

LINE INSTALLATION
Install the refrigeran t lines using the fo llowing procedur e:

1. Remove the cap and Schrad er core from both t he liquid and
vapor fitting service ports at the outdoor unit. Connect low
pressure nitrogen t o the l iquid line serv ice por t.

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 cont inue flowing.

3. Carefully remove the rubber plugs from the indoor coil
liquid and vapor conne ctions. Use cau tion, since the coil is
pressurized. Release the gas through the schrader fitting
at the liquid connection befor e removing ca p on vapor line.

to prevent going past the

FIGURE 9 - HEAT PROTECTION

8 Unitary Products Group

4. Braze the liquid line to the indoor coil liquid connection.
The nitrogen should now be flowing through the coil.

5. Remove the grommet from the vapor connec tion at the coil.
Braze the vapor line to the indoor coil vapor connection.
After the connect ion ha s cooled, replace the gromm et.

6. Protect the vapor fitting with a wet ra g 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 fitt ing ser vice por t .

7. Evacuate the vapor line, in door coil and the liquid line. See
“EV ACUATION” 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 serv­ice port flare caps to be sur e they are leak tight. DO NOT
OVERTIGHTEN (between 40 and 60 inch - lbs. maximum).

9. Do not remove the f lare caps f rom the ser vice ports except
when necessary for servicing the sy stem .

CAUTION: Do not connect manifold gauges unless trouble is

suspected . Approximat ely 3/4 ounce of refriger ant
will be lost each time a standard manif old gauge is
connected .

515.26-N5Y

opened to the atmosphere. If a leak is suspected, leak test to
locate the leak. Rep air the leak an d te st again.

WARNING:Never attempt to repair any brazed connections

while the system is unde r pressure. Personal injury
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. If t he micron gauge indicates a steady and continuou s
rise, it’s an indication of a leak. If the gauge shows a rise, then
levels off after a few minut es and remain s fairly constant, its an
indication that the system is le ak free but st ill contains moisture
and may require further evacation if the reading is above 500
microns.

SYSTEM CHARGE

CAUTION: Refrigerant charging should only be carried out by

a qualified air conditioning contractor with proper
certification.

10.Release refrigerant charge into the system . Open bot h the
liquid and vapor fittings by removing the plunger cap and
with an allen wrench bac k out counter -clockwise until va lve
stem just touches retaining ring. See Base Valve Connec­tion Precautions.

11. The sweat connect outdoor unit contains enough refriger­ant charge for a matched indoo r coil and 15 feet of 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 rec omme nded charg ing
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 thermo­stats.

The thermostat should be located about 5 ft. above the floor,
where it will be expos ed to no rm al room air cir culat ion. Do not
place it on an outside wall or where it is exposed to the ra diant
effect from exposed glass or appliances, drafts from outside
doors or supply air grilles.

Mount the th ermostat and route the 24-vo lt contro l wiring (NE C
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
affect ing th e anticipat or s in the thermost at .

Route the control wiring into the outdoor unit through the hole
provided. Connect the control wiring, see Figure 4 or 5 for
Ty pical Field Wir ing.

The factory charge in the outdoor unit is listed in Table 4 and
includes enough char ge for the unit and a ma tched indoor coil.
Sweat connect units also include sufficient charge for 15 feet
of lines. Pre-charged lin e lengths ar e fact ory charged wit h th e
correct amount of refrigerant required.

Sweat connect insta llations over 15 fe et long and some indoor
coil matches may requir e some addit ional charge. Table 5 lists
the amount of any addit io nal refr igera nt required.

T ABL E 5 - REFRIGERANT LINE CHARGES

LIQUID OD VAPOR OD R-22 CHARGE OZ./FT.

3

⁄8”

3

⁄8”

3

⁄8”

The “TOTAL SYSTEM CHARGE” must be permanently
stamped on the unit data plat e.

Total system charge is dete rmined as follows:

1. Determine the outdoor unit charge f ro m Table 4.

2. Determine indoor coil adju st me nt 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 unit s.

b) Calculate over 15 feet of sweat lines for sweat connect

units.

NOTE: The charge for pre-charged lines should be included

in the system charge s hown on th e data pla te but nee d
not be added to the sy stem. If swea t connect lines are
used, the line charge over 15 feet should be included
on the data pla te and m ust be add ed t o th e syst em.

5

⁄8“ 0.66

3

⁄4” 0.68

7

⁄8” 0.70

EV ACUATION

It will be necessary to evacuate the system if the unit has
developed a leak during shipment or was, for any other reason,

Unitary Products Group 9

4. Total system ch a rge = item 1 + item 2 + item 3.

5. Permanently stamp the unit data plate with the total amo unt

of refrigerant in the system.

515.26-N5Y

OUTDOOR
COIL

COOLING CYCLE FLOW
HEATING CYCLE FLOW

SUCTION
ACCUM.

FIELD INSTALLED BI-FLOW LIQUID STRAINER / DRYER

4-WAY REVERSING VALVE*

*SHOWN IN
COOLING
POSITION

COMPRESSOR

FIELD CONNECTED LINE

INDOOR
COIL

FLOW
CONTROL
DEVICE
(COOLING)

FLOW CONTROL DEVICE (HEATING)

FIGURE 11 - HEAT PUMP FLOW DIAGRAM

Use the following charging metho d whenever add itional refrig­erant 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 metho d for heat pump s in the heat pum p mode.

Check flare caps o n service ports to b e sure they are leak tight.
DO NOT OVER TI G HTEN (bet ween 40 and 60 inch-lbs . maxi­mum).

SYSTE M OP E R ATION

See Figure 11 to trace the flow of refrigerant through the
system.

WITH POWER TO UNIT AND THERMOSTAT IN
POSITION.

1. Reversing valve is energized through thermostat system
switch to position re frigerant circuit f or cooling oper ation. In
the cooling cycle, discharge gas is pumped to the outdoor
coil which is the condenser . The indoo r coil is the evapora­tor.

2. If fan switch is in “ON” position, a circuit is made through
blower relay to provide continuou s blower oper ation.

3. When thermostat cooling contact closes, a circuit is made
to energize contac tor and star t the system , if the com pres-

COOLING

FIELD CONNECTED LINE

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 provid e blower oper atio n.

4. System will cycle with thermos ta t dem and to p rov id e cool­ing as needed.

WITH POWER TO UNIT AND THERMOSTAT IN

HEATING

POSITION

1. Reversing valve is de-energized to position refrigerant
circuit for hea ting ope ration. In the he ating cy cle, discharg e
gas is pumped to the indoor coil which is the condenser.
The outdoor coil is the evapor at or.

2. If fan switch is in “ON” position, a circuit is made through
blower relay to provide continuou s blower oper ation.

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
made from therm ostat heating cont act through blower rela y
to provide blower operat ion.

4. The system will cycle in response to thermostat signal to
provide heatin g as nee ded.

5. Supplemental electric heaters are energized by second
stage of heating thermostat.

10 Unitary Products Group

SEQUENCE OF OPERATION

FIGURE 12 - TIME / TEMPERATURE DEFROST BOARD

COOLING:
On call for cooling , th e ther m ost at make s 24 V circ uits : R t o O,

R to Y, and R to G. Circu it R to O energ izes the reversing v alve,
switching it to cooling position. Circuit R to Y energizes the
contactor, starting outdoor fan motor and compressor circuit.
R to G energizes the indoor unit blower relay , starting t he indoor
blower motor .

515.26-N5Y

Pressure limit switch opening for more than one second. The
compressor will remain off, even though the limits close and
will start up on ly when the lockout is r eset. Since there is no “X”
output on this contro l, no malfun ction indication light will illumi­nate on the thermostat. To reset the lockout,

turn the indoor
thermostat ’s system switch to “OFF” then, back to the selec ted
mode within 5 second OR disconnect the power to the trans­former for at least two seconds. Please note that thermostats
with anti-sh ort cycle timer s will only be able to re set by d iscon­necting the power to the transf or me r for at least two seco nds.

HEATING:
On call for heating, ther most at mak es circu its R to Y and R to

G. Circuit R to Y energize s contactor , starting outdoor fa n motor
and compressor. Circuit R to G energizes the indoor blower
relay , starting the blowe r motor.

Should the temper ature continu e to fall, R to W is made t hrough
the second stage of the thermostat. Circuit R to W energizes
the supplemental electric heat. The field-installed option out­door thermostat can be used to turn on only the first stage of
electric heat if the temperature is above the setting tempera­ture. If gas/propane f urnace is used as the sup plemental heat ,
add-on control kit (2AC02700701) must be used. See the
add-on control installation ins truction for the system operation.

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 he atin g therm os tat.

4. Indoor blower will operate on demand for heat and cycle o ff
with the last heater element when in “AUTO” position .

SAFETY LOCKOUT M ODE:
The lock out control opens the circuits to the compressor

contactor , stopping t he c ompressor in r esponse to (400 #) High

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, 6 0, and 90 minut es).

Factory set at

60 minutes.
The electronic timer and the defrost cycle will start only when

the cont actor is e nergized and the defr ost the rmostat is closed.
The defrost thermostat is closed when the liquid temperature
falls below approximat ely 31 ° F.

The defrost mode is identical to the cooling mode except that
the outdoor fa n mot or sto ps an d t he 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 thermo­stat is opened at

60°F or 10 minutes of compressor accumu­lated run time, whichever comes first. Note: The defrost
thermostat delay will make the coil temperature abou t 75 - 80 °F.
Please note that the timer will stop the circuit when R to Y is
disconnected.

TEST PIN:
The “TEST” terminals are designed f or defr ost test. When th e

“TEST” terminals are shor ted together , the control will allow the
unit to go into a defrost cycle if the compressor is operating.
When the sh ort is removed, the heat pum p will remain in defr ost
until the def rost thermos tat is open or 10 minutes expire s. If the
thermostat is open when the shor t is removed , the he at pum p
will exit defrost .

REVERSING
VALVE

PRESSURE
SWITCH

DEFROST
STAT

COMPRESSOR
RELAY

Unitary Products Group 11

C C

C
R

M

Y

K1

K2

COND FAN

HIGH VOLTAGE

W1/66

THERMOSTAT

W

K3

O

U1

C

R

TEST

RUN TIME

90

90
60

60
30

30

SEL MIN

R2

DEFROST
TEST
PIN

TIME
SELECTION
TAP

INSTRUCTING T HE OW NE R

NOTICE TO O WNER:

Assist owner with processing warranty cards. Review User’s
Information M anual and provide a c opy for the own er guidance
on proper oper ation and mainte nance. Instruct th e owner or the
operator how to start, stop an d adjust temper ature setting. Th e
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
heater is energized only when the unit is not running. If the main
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 allow su fficient time for all liquid refrigerant
to be driven out of the com pr esso r.

The installer should also in struct the owner on prop er operation
and maintenance of all other system compon ent s.

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. The indoor blower (f urnace or air handler ) wi ll be oper ating,
discharging cool air fro m the du cts.

3. The vapor line at the out door u nit w ill feel cool to the tou ch.

4. The liquid line at the outdoor unit will feel warm to the touch.

If lockout occurs, check the following before calling a serviceman:

1. Indoor section for dirty filter.

2. Outdoor section for snow accumulat ion.

3. Outdoor section for leaf or debris blockage.
Eliminate problem, turn off the thermostat for 10 seconds and attempt

start. Wait 5 minutes. If system does not start, call servicema n.

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 attachme nt , or other suitable me ans.

2. The outdoor fan moto r is per ma nent ly lu b ricat ed 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 com e in con tact with paint ed surfac es.

4. Refer to the furnace or air handler instruc tions f or filter and
blower motor maint enance.

5. The indoor coil drain pan should be inspect ed and cleaned
regularly to prevent odor s and assur e pro per draina ge.

HEATING
Indications of proper Heating op era tion is as follows:

1. The outdoor fan should be running, with cool air being
discharged from the top of the unit .

2. The indoor blower (f urnace or air handler ) wi ll be oper ating,
discharging warm air fro m the du cts.

3. The vapor line at the outdoor unit will feel warm to the touch.

4. The liquid line at the outdoor unit w ill feel cool to the touch.

CAUTION: IT IS UNLAWFUL TO KNOWINGLY VENT, RE­LEASE 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 APPROV AL.

Unita ry Pro duc ts Gro u p
P.O. Box 1592, York, Pennsylvania USA 17405-1592
Subject to change without notice. Printed in U.S.A.
Copyright  by York International Corporation 199 6. All Rights Reserved.

SHU 12M 296 .66

Code: SBY

515.26-N5Y