Unitary products group EF-10 User manual

INSTALLATION
INSTRUCTION
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
MODEL: EF-10
O
O
O
OO
208/230/460
VOLT ONLY
SPLIT-SYSTEM HEAT PUMPS
OUTDOOR UNITS
035-18550-001-A-0902
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .4
AGENCY APPROVALS. . . . . . . . . . . . . . . . . . . . . . . . . .4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
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 installer that personal injury and/or equipment dam-
age may result if installation procedure is not handled
properly.

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2Unitary Products Group
TABLE OF CONTENTS
NOMENCLATURE. . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 4
REFERENCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
AGENCY APPROVALS. . . . . . . . . . . . . . . . . . . . . . . 4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LIMITATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
LOCATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
ROOF-TOP LOCATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
GROUND LEVEL LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . .6
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . .6
CLEARANCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
COMPRESSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
COMPRESSOR CRANKCASE HEATER. . . . . . . . . . . . . . . . . .9
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . .9
POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
WIRE SIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
REFRIGERANT PIPING . . . . . . . . . . . . . . . . . . . . . . . . .11
GENERAL GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
LINE SIZING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
SERVICE VALVES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
EXTENDING THE SERVICE PORTS . . . . . . . . . . . . . . .13
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
EVACUATING AND CHARGING. . . . . . . . . . . . . . . . . . .15
ALTERNATE CHARGING METHODS . . . . . . . . . . . . . . . . . . .16
BALANCE POINT SETTING . . . . . . . . . . . . . . . . . . . . . .16
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CRANKCASE HEATER. . . . . . . . . . . . . . . . . . . . . . . . . .17
PRE-START CHECK. . . . . . . . . . . . . . . . . . . . . . . . . . . .17
INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
PHASING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SYSTEM SEQUENCE OF OPERATION. . . . . . . . . . . . . 18
COOLING OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
HEATING OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DEFROST CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
OPERATION BELOW 0ºF OUTDOOR TEMPERATURE. . . . 20
EMERGENCY HEAT OPERATION . . . . . . . . . . . . . . . . . . . . 20
SAFETY FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SECURE OWNER’S APPROVAL . . . . . . . . . . . . . . . . . . 21
MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
LUBRICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
REPLACEMENT PARTS. . . . . . . . . . . . . . . . . . . . . . . . . 21
NOTICE TO OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
LIST OF FIGURES
Fig. # Pg. #
1 CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . . . . . . 6
2 TYPICAL RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 POINT LOADS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 UNIT DIMENSIONS AND CLEARANCES. . . . . . . . . . 8
5 TYPICAL FIELD WIRING . . . . . . . . . . . . . . . . . . . . . 10
6 FIELD PIPING DIAGRAMS . . . . . . . . . . . . . . . . . . . . 12
7 EXTENDING THE SERVICE PORTS . . . . . . . . . . . . 15
8 REFRIGERANT FLOW DIAGRAM . . . . . . . . . . . . . . 15
9 CHARGING CURVE EF-10
(COOLING MODE) . . . . . . . . . . . . . . . . . . . . . . . . . . 17
LIST OF TABLES
Tbl. # Pg. #
1 PHYSICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 UNIT APPLICATION DATA. . . . . . . . . . . . . . . . . . . . . 5
3 ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 LIQUID LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 VAPOR LINES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 REFRIGERANT LINE CHARGE . . . . . . . . . . . . . . . . 12

035-18550-001-A-0902
Unitary Products Group 3
NOMENCLATURE
PRODUCT NOMENCLATURE
OUTDOOR CONDENSING UNITS AND HEAT PUMPS
EF -10 C 00 A T A AA 1 A
Model # Model Number
Description Options
E Product Category H = Air Conditioner Split System E = Heat Pump Split System
F Product Identifier F = R-22 Standard Efficiency 2-Pipe
-10 Nominal Cooling Capacity
MBH
-07 = 7 1/2 Ton
-10 = 10 Ton
CHeatType C = Cooling Only
00 Nominal Heating
Capacity 00 = No Heat Installed
A Airflow Options A = Standard Motor
T Voltage T = 208/230-3-60
W = 460-3-60
A Installation Options A = None
AA Special Options AA = None
AC = Technicoat
1 Generation 1 = First Generation 2nd = Second Generation

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4Unitary Products Group
GENERAL
These heat pump units are designed for outdoor instal-
lation on a roof or at ground level. Every unit is com-
pletely piped and wired at the factory and is shipped
ready for immediate installation. Only the liquid and
vapor lines to the indoor coil, the control wiring and the
main power wiring are required to complete the instal-
lation. Each unit is dehydrated, evacuated, leak tested
and pressure tested at 450 psig before being pressur-
ized with a holding charge of Refrigerant-22 for ship-
ment and/or storage.
Every unit includes a heavy-duty compressor with line
break overload protection, a suction line accumulator,
a 4-way reversing valve, filter-drier, expansion valves,
distributors, check valves, and a copper tube/aluminum
fin coil.
All controls are readily accessible for maintenance,
adjustment and service. All power and control wiring
can be routed through the front of the unit.
SAFETY CONSIDERATIONS
Installer should pay particular attention to the words:
NOTE, CAUTION and WARNING. Notes are intended
to clarify or make the installation easier. Cautions are
given to prevent equipment damage. Warnings are
given to alert the installer that personal injury and/or
equipment damage may result if the installation proce-
dure is not handled properly.
REFERENCE
This instruction covers the installation of the outdoor
unit. For information on the matching indoor, see PN#
035-18877-001.
All accessories come with a separate installation man-
ual. Refer to Parts Manual for complete listing of
replacement parts on this equipment.
The above forms may be ordered from:
Standard Register
2101 W. Tecumseh Rd
Norman, Oklahoma 73069
Toll Free Tel. [phone]
Toll Free Fax. [phone]
AGENCY APPROVALS
Design certified by UL as follows:
1. For use as a cooling/heat pump unit only.
2. For outdoor installation only.
INSPECTION
As soon as a unit is received, it should be inspected for
possible damage during transit. If damage is evident,
the extent of the damage should be noted on the car-
rier's freight bill. A separate request for inspection by
the carrier's agent should be made in writing. See Form
50.15-NM for more information.
Improper installation may create a condition
where the operation of the product could cause
personal injury or property damage.
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 or service agency.
This product must be installed in strict compli-
ance with the enclosed installation instructions
and any applicable local, state, and national
codes including, but not limited to, building,
electrical, and mechanical codes.

035-18550-001-A-0902
Unitary Products Group 5
INSTALLATION
LIMITATIONS
These units must be installed in accordance with all
national and local safety codes. If no local codes apply,
installation must conform with the appropriate national
codes. See Table 2 for unit application data. Units are
designed to meet National Safety Code Standards. If
components are to be added to a unit to meet local
codes, they are to be installed at the dealer's and/or
the customer's expense.
LOCATION
Use the following guidelines to select a suitable loca-
tion for these units.
1. The outdoor units must be installed outside the
building. The outdoor fans are the propeller type
and are not suitable for use with duct work.
2. The outdoor and indoor units should be installed as
close together as possible and with a minimum
number of bends in the refrigerant piping. Refer to
REFRIGERANT PIPING for additional information.
TABLE 1: PHYSICAL DATA
Description Unit Model EF-10
Compressor1Rating, (Tons) 10
Fans Quantity 2 Diameter, (In.)/No. Blades 24/3
Nominal CFM 7830
Fan Motors2HP 3/4
RPM 1100
Coil
Face Area, (Sq. Ft.) 36.11
Rows Deep x Rows High 2 x 40
Finned Length, (In.) 130
Tube (Copper) OD - inches 3/8
Fins (Aluminum) per inch 20
Refrigerant-22
(Lbs.) Holding Charge 2.25
Operating Charge331.8
Unit Weight
(Lbs.) Shipping 857
1. These compressors are fully hermetic.
2. These PSC motors are directly connected to the outdoor fans and have inherent protection, ball bearings and a 48 frame.
3. Includes outdoor unit and matched indoor blower unit, but no piping. Refer to Table 6 for refrigerant line charge.
TABLE 2: UNIT APPLICATION DATA
MODEL EF-10
Voltage Variation1
Min. / Max.
1. Rated in accordance with ARI Standard 110, utilization
range “A”.
208/230-3-60 187 / 252
460-3-60 432 / 504
Air Temperature on
Outdoor Coil, ºF
Min. / Max.
Cooling 40ºF / 125ºF
Heating 0ºF2/ 75ºF
2. Below 0ºF, the control system stops the compressor
and allows the electric heat accessory to cycle at its
standby capacity.
Air Temperature on
Indoor Coil ºF
Min. / Max.
Cooling 57ºF / 72ºF
Heating 50ºF3/ 80ºF
3. Operation below this temperature is permissible for a
short period of time when a unit is required to heat the
conditoned space up to 50ºF.

035-18550-001-A-0902
6Unitary Products Group
3. The outdoor unit should not be installed beneath
windows or between structures where normal oper-
ating sounds may be objectionable.
4. All units require certain clearances for proper oper-
ation and service. Refer to General Installation
Form 55.70-N1 for additional guidelines.
On either roof top or ground level installations, rubber
padding can be applied between the base rails and
their supports to lessen any transmission of vibration.
ROOF-TOP LOCATIONS
Be careful not to damage the roof. Consult the building
contractor or architect if the roof is bonded. Choose a
location with adequate structural strength to support
the unit.
The unit must be mounted on solid level supports. The
supports can be channel iron beams or wooden beams
treated to reduce deterioration.
A minimum of two (2) beams are required to support
each unit. The beams should: (1) Be positioned per-
pendicular to the roof joists. (2) Extend beyond the
dimensions of the unit to distribute the load on the roof,
(3) Be capable of adequately supporting the entire unit
weight. Refer to Figure 1 and Table 1 for load distribu-
tion and weights.
These beams can usually be set directly on the roof.
Flashing is not required.
NOTE: On bonded roofs, check for special installation
requirements.
GROUND LEVEL LOCATIONS
The units must be installed on a substantial base that
will not settle. Any strain on the refrigerant lines may
cause a refrigerant leak.
A one-piece concrete slab with footers that extend
below the frost line is recommended. The slab should
not be tied to the building foundation because noise
and vibration will telegraph into the building.
A unit can also be supported by concrete piers. These
piers should: (1) extend below the frost line, (2) be
located under the unit's four corners and (3) be sized to
carry the entire unit weight. Refer to Figure 1 and Table
1 for the center of gravity and unit weight.
A gravel bed or some other means of handling the con-
densate that will drop from the underside of the unit coil
during the heating and defrost cycles may have to be
provided.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove
any packaging until the unit is near the place of installa-
tion.
Rig the unit by attaching nylon straps with hooks to the
lifting holes provided in the base rails. Spreaders,
whose length exceeds the largest dimension across
the unit, MUST be used across the top of the unit if the
The outdoor unit should not be installed in an
area where mud and/or ice could cause per-
sonal injury. Remember that condensate will
drip from the underside of the unit coils during
heat and defrost cycles and that this conden-
sate will freeze when the temperature of the
outdoor air is below 32°F.
Care should be taken to protect the unit from
tampering and unauthorized persons from
injury. Screws on access panels will prevent
casual tampering. Additional safety precau-
tions such as fences around the unit or locking
devices on the panels may be advisable.
Check local authorities for safety regulations.
FIGURE 1 - CENTER OF GRAVITY
Unit Dim. (In.)
ABCD
10 Ton 76-7/8 39-7/8 38-7/8 16

035-18550-001-A-0902
Unitary Products Group 7
rigging height above the top of the unit is less than 5
feet. See Figure 2.
BEFORE LIFTING A UNIT, MAKE SURE THAT ITS
WEIGHT IS DISTRIBUTED EQUALLY ON THE
STRAPS SO THAT IT WILL LIFT EVENLY.
Units may also be moved or lifted with a fork-lift. Slot-
ted openings in the base rails are provided for this pur-
pose.
LENGTH OF FORKS MUST BE A MINIMUM OF 54"
when lifting from either side.
Remove the nesting brackets from the four corners on
top of the unit. All screws that are removed to take
these brackets off must be replaced on the unit.
Do not use straps under the unit or through the
fork lift slots for lifting purposes. Sharp metal
edges can damage the straps and could result
in personal injury or equipment damage.
FIGURE 2 - TYPICAL RIGGING
Before lifting the unit, make sure that its
weight is distributed equally on the cables so
that it will lift evenly.
SPREADER
BAR
LIFTING
HOLES
FIGURE 3 - POINT LOADS
A
D
B
C
UNIT 4-POINT LOAD (lbs)
TOTAL A B C D
10 Ton 741 258 173 123 187

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8Unitary Products Group
CLEARANCES
All units require certain minimum clearances for proper
operation and service. Refer to Figure 4 for these
clearances.
Additional height may be required for snow clearance if
winter operation is expected.
MINIMUM CLEARANCES
CLEARANCE DESCRIPTION DISTANCE IN
INCHES
Overhead (Top)1
1. Units must be installed outdoors. Overhanging structures or
shrubs should not obstruct condenser air discharge.
120
Front (Piping and Access Panels) 30
Left Side 24
Right Side 24
Rear 24
Bottom2
2. Adequate snow clearance must be provided during winter oper-
ation.
0
Do not permit overhanging structures or shrubs
to obstruct air discharge.
FIGURE 4 - UNIT DIMENSIONS AND CLEARANCES
All dimensions are in inches.
They are subject to change
without notice. Certified
dimensions will be provided
upon request.
Connection
Entry ConnectionSize 15 Ton
Suction Line A 1-1/8 ID
Liquid Line B 5/8 ID
Power Wiring C 2-1/8 KO
Control Wiring D 7/8 KO
AIR
OUT
AIR
OUT
AIR
IN
44-1/4 -
COMPRESSOR AND
FAN MOTOR ACCESS
76-7/8
39 -7/8
OO
O
EXTERNAL PRESSURE
GAUGE FITTINGS
D
C
A
B
6- 3 / 4
EF-10
15-3/4
7-3/4

035-18550-001-A-0902
Unitary Products Group 9
COMPRESSORS
Units are shipped with compressor mountings factory-
adjusted and ready for operation.
COMPRESSOR CRANKCASE HEATER
The compressor is equipped with a crankcase heater
to prevent refrigerant from mixing with crankcase oil
during the “OFF” cycle. The heaters will be energized
when the compressor is not running providing the unit
disconnect switch is closed.
If a unit has just been installed or the unit disconnect
switch has been open for a long period of time, move
the system switch on the room thermostat to the “OFF”
position before closing the unit disconnect switch. Eight
hours of crankcase heat are required to drive the liquid
refrigerant out of the compressor before the compres-
sor can be started.
POWER AND CONTROL WIRING
Install electrical wiring in accordance with the latest
National Electrical Code (NFPA Standard No. 70) and/
or local regulations. The unit should be grounded in
accordance with these codes.
POWER WIRING
Check the voltage of the power supply against the data
on the unit nameplate. Check the size of the power
wire, the disconnect switch and the fuses against the
data on Table 3.
NOTE: Copper conductors must be installed between
the disconnect switch and the unit.
Refer to Figure 4 for the location of the power wire
access opening through the front of the unit. This open-
ing will require a field-supplied conduit fitting.
The field-supplied disconnect switch must be suitable
for an outdoor location. Although it should be installed
near the unit, do NOT secure it to the unit cabinet.
Refer to Figure 5 for typical field wiring.
PHASING
Scroll compressors operate in one direction only, if a
three phase scroll compressor is experiencing:
• Low amperage draw
• Similar discharge and suction pressures
• Increased noise level
then the compressor is operating in reverse. To correct
this condition, switch any two (2) line voltage leads at
the contactor. Please note, single phase scroll com-
pressors will start and run in one direction only. The
reverse operation is not a concern.
CONTROL WIRING
Refer to Figure 5 for the location of the control wire
access opening through the front of the unit.
Route the necessary low voltage control wires (18 Awg
Min) from terminal block TB2 of the unit control box
through this access opening to the indoor unit and to
the room thermostat. Refer to Figure 5 for typical field
wiring.
The room thermostat should be mounted about 5 feet
above the floor and located where it will be exposed to
normal room air circulation. Do not locate it on an out-
side wall, near a supply air grill, or where it may be
affected by sunlight and/or drafts. Circulation of air to
the thermostat should not be blocked by curtains,
drapes, furniture, partitions, etc.
Some installations may require a locking cover to pro-
tect the thermostat from tampering and/or damage.
WIRE SIZING
Refer to the following chart to size the control wiring
properly. If the wiring is undersized, voltage drop could
become excessive and result in malfunctioning of the
unit controls.
Do Not loosen compressor mounting bolts.
Do not attempt to start the compressor without
at least eight hours of crankcase heat or com-
pressor damage will occur.
Units equipped with scroll compressors oper-
ate in one direction only.
Incorrect scroll compressor rotation can dam-
age or fail the compressor(s).

035-18550-001-A-0902
10 Unitary Products Group
FIGURE 5 - TYPICAL FIELD WIRING
035-16602-001
TB1 can be routed
TB1
TB1
TB2
TABLE 3: ELECTRICAL DATA
MODEL VOLTAGE
CODE UNIT POWER SUPPLY
COMPRESSOR1CONDENSER FAN MOTOR UNIT
QTY RLA LRA QTY HP FLA
MINIMUM
CIRCUIT
AMPACITY
(AMPS)
MAXIMUM
FUSE SIZE2
(AMPS)
MINIMUM
DISCONNECTSIZE3
(AMPS)
EF-10 2 208/230/3/60 1 42.0 239.0 2 3/4 3.0 58.5 100 100
4 460/3/60 1 19.2 125.0 2 3/4 1.6 27.2 45 45
1. The 208-230 V compressors and motors use a single tap for the entire range of voltages. The 208/230 V to 24 V transformers
have different taps for 208 and 230 V.
2. Dual element, time delay type.
3. Refer to article NEC/NFPA No. 70, articles 440-11,12 for information on minimum disconnect sizing.