Unitary products group HF-25 - 25 Ton User manual

CONTENTS
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 5
AGENCY APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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.
INSTALLATION
MANUAL
CAUTION: READ ALL SAFETY GUIDES BEFORE
YOU BEGIN TO INSTALL UNIT.
SAVE THIS MANUAL
MODELS: HF-25 - 25 Ton
HL-30 - 30 Ton
HL-40 - 40 Ton
HL-50 - 50 Ton
SPLIT-SYSTEM
CONDENSING UNITS
(AIR COOLED)
278806-BIM-A-1106

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TABLE OF CONTENTS
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 5
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
AGENCY APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . .5
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
ROOFTOP LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
GROUND LEVEL LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . .7
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
COMPRESSOR CRANKCASE HEATERS . . . . . . . . . . . .9
REFRIGERANT MAINS . . . . . . . . . . . . . . . . . . . . . . . . .10
LINE SIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
SERVICE VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
EVACUATION AND CHARGING . . . . . . . . . . . . . . . . . .12
PIPING AND ELECTRICAL CONNECTIONS . . . . . . . . .18
PIPING AND ELECTRICAL CONNECTION SIZES . . . .20
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CRANKCASE HEATER . . . . . . . . . . . . . . . . . . . . . . . . .22
PRE-START CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . .22
INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . .22
OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
PUMP OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
INTERMITTENT BLOWER . . . . . . . . . . . . . . . . . . . . . . . . . . .23
COOLING SEQUENCE OF OPERATION . . . . . . . . . . . . . . . .24
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
UNIT CONTROL BOARD OPTION SETUP . . . . . . . . . .26
OPTION BYTE SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
CONDENSER FAN OPERATION . . . . . . . . . . . . . . . . . .26
OPERATION WITH A TWO-STAGE THERMOSTAT . . .26
OPERATION WITH A FOUR-STAGE THERMOSTAT . .26
SECURE OWNER'S APPROVAL . . . . . . . . . . . . . . . . . .26
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
CLEANING CONDENSER SURFACE . . . . . . . . . . . . . .27
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
COMPRESSOR REPLACEMENT . . . . . . . . . . . . . . . . .27
LIST OF FIGURES
Fig. # Pg. #
1 CORNER WEIGHTS & CENTER OF GRAVITY . . . . . 7
2 TYPICAL RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 TYPICAL FIELD WIRING DIAGRAM - HF-25 UNIT . 15
4 TYPICAL FIELD WIRING DIAGRAM - HL-30, 40, 50
UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 TYPICAL LIQUID LINE SOLENOID WIRING . . . . . . 17
6 HF/HL UNIT DIMENSIONS . . . . . . . . . . . . . . . . . . . . 18
7 25, 30 & 40 TON POWER AND CONTROL WIRING
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 50 TON POWER AND CONTROL WIRING
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
9 25 TON PIPING CONNECTIONS . . . . . . . . . . . . . . . 20
10 30 & 40 TON PIPING CONNECTIONS . . . . . . . . . . . 21
11 50 TON PIPING CONNECTIONS . . . . . . . . . . . . . . . 21
12 UNIT CONTROL BOARD . . . . . . . . . . . . . . . . . . . . . . 25
13 FAN ORIENTATION CONTROL BOX END . . . . . . . . 26
14 25 TON CHARGING CHART . . . . . . . . . . . . . . . . . . . 27
15 30 TON CHARGING CHART . . . . . . . . . . . . . . . . . . . 28
16 40 TON CHARGING CHART . . . . . . . . . . . . . . . . . . . 28
17 50 TON CHARGING CHART . . . . . . . . . . . . . . . . . . . 29
18 TYPICAL 25 TON CONDENSER UNIT WIRING
DIAGRAM - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . 30
19 TYPICAL 25 TON CONDENSER UNIT WIRING
DIAGRAM - 460-3-60, 575-3-60 . . . . . . . . . . . . . . . . . 31
20 TYPICAL 30 OR 40 TON CONDENSING UNIT WIRING
DIAGRAM - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . 32
21 TYPICAL 30 OR 40 TON CONDENSING UNIT WIRING
DIAGRAM - 460-3-60, 575-3-60 . . . . . . . . . . . . . . . . . 33
22 TYPICAL 50 TON CONDENSER UNIT WIRING
DIAGRAM - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . 34
23 TYPICAL 50 TON CONDENSER UNIT WIRING
DIAGRAM - 460-3-60, 575-3-60 . . . . . . . . . . . . . . . . . 35

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TABLE OF CONTENTS - Con’t.
LIST OF TABLES
Tbl. # Pg. #
1 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 UNIT APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . 6
3 CORNER WEIGHTS & CENTER OF GRAVITY
(INCHES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 MINIMUM CLEARANCES . . . . . . . . . . . . . . . . . . . . . . 8
5 ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 SUCTION LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 LIQUID LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8 R-22 LINE CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . 14
Tbl. # Pg. #
9 UNIT DIMENSIONS (INCHES) . . . . . . . . . . . . . . . . . 18
10 PIPING AND ELECTRICAL CONNECTION SIZES
(25T) (INCHES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
11 PIPING AND ELECTRICAL CONNECTION SIZES
(30/40/50T) (INCHES) . . . . . . . . . . . . . . . . . . . . . . . . 20
12 ELECTRICAL POWER KNOCKOUT
SIZES (INCHES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
13 UNIT CONTROL BOARD FLASH CODES . . . . . . . . 25

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NOMENCLATURE
NOTE: HL models are designed for 4-Pipe (dual)
applications only. 4-Pipe condensing units can-
not be matched with one single 2-Pipe air han-
dler.
PRODUCT NOMENCLATURE
OUTDOOR SPLIT CONDENSING UNITS
HF -30 C 00 A T A AA 2
Model # Model Number
Description Options
H Product Category H = Air Conditioner Split System
L Product Identifier F = R-22 Standard Efficiency 2-Pipe
L = R-22 Standard Efficiency 4-Pipe
-30 Nominal Cooling Capacity
MBH
-25 = 25 Ton
-30 = 30 Ton
-40 = 40 Ton
-50 = 50 Ton
CHeatType C = Cooling Only
00 Nominal Heating
Capacity 00 = No Heat Installed
A Airflow Options A = Standard Motor
TVoltage T = 208/230-3-60
W = 460-3-60 X = 575-3-60
A Installation Options A = None
B = Disconnect C = Service Valves D = Service Valves + Disconnect
AA Additional Options AA = None
AC = Technicoated Coil
2 Product Generation 1 = 1st Generation 2 = 2nd Generation

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Unitary Products Group 5
GENERAL
These condensing units are designed for outdoor
installation on a roof or at ground level. Every unit is
completely piped and wired at the factory and is
shipped ready for immediate installation. Only the liq-
uid and suction lines to the evaporator coil, the filter
drier, the control wiring and the main power wiring are
required to complete the installation. Each unit is dehy-
drated, evacuated, leak tested and pressure tested at
450 psig before being pressurized with a holding
charge of refrigerant-22 for shipment and/or storage.
All controls are located in the front of the unit and are
readily accessible for maintenance, adjustment and
service. All wiring (power and control) can be made
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 installer that personal injury and/or equip-
ment damage may result if installation procedure is not
handled properly.
REFERENCE
This instruction covers the installation and operation of
the basic condensing unit. For information on the
installation and operation of the evaporator blower
units, refer to instruction Form No. 035-18496-000.
All accessories come with a separate Installation Man-
ual.
Refer to Parts Manual for complete listing of replace-
ment parts on this equipment.
AGENCY APPROVALS
Design certified by ETL as follows:
1. For use as a cooling unit.
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.
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.

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6Unitary Products Group
INSTALLATION
LIMITATIONS
These units must be installed in accordance with all
national and local safety codes. If no local codes apply,
installation must conform to the appropriate national
codes. 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 both the condensing unit and the evaporator.
1. The condensing unit is designed for outdoor instal-
lation only.
TABLE 1: PHYSICAL DATA
Model
HF/HL
Compressor1Condenser Unit Weight
(Lbs.) Charge, R-22
Fan (Propeller) Fan Motor Coil (Copper Tube-Aluminum Fin)
Nominal
Capacity
(tons)
Capacity
Stages Qty. Dia. Pitch
Deg. Nom. CFM RPM HP Face
Area
(Ft.2)
Rows
Deep
Coil
Width
(In.)
Tube
OD
(In.)
Fins
per
inch
Ship-
ping Opera- tion Operation3
(Lbs.-Oz.) Holding
(Lbs.)
-25 25 2 4 24 34 23244
1140
1.25 50
2
60
3/8 16
1608 1658 49.65 1.0
-30
System 1 15 2 2 24 36 12690 1.25 25 60 1730 1790 30.08 1.0
System 2 15 2 2 24 36 12690 1.25 25 60 30.08
-40
System 1 20 2 2 30 22 15414 1.50 32.5 78 1961 2037 37.83 1.0
System 2 20 2 2 30 22 15414 1.50 32.5 78 37.83
-50
System 1 25 2 2 30 26 19386 1.50 52 78 2470 2563 46.59 1.0
System 2 25 2 2 30 26 19386 1.50 52 78 46.59
1. All compressors are Copeland Scrolls.
2. One of the fan motors is controlled by a pressure switch and will not operate until system pressure reaches 280 psig and drops
below 180 psig.
3. The total operating charge of the condensing unit, matching indoor unit and 25 feet of interconnecting piping.
TABLE 2: UNIT APPLICATION DATA
Voltage Variation1
Min. / Max.
1. Utilization range “A” in accordance with ARI Standard
110.
208/230-3-60 187/252
460-3-60 432/504
575-3-60 540/630
Ambient Air on Condenser Coil
Min. /Max. 40°F/125°F2
2. These units can operate in an ambient temperature of
125°F providing the wet bulb temperature of the air
entering the evaporator coil does not exceed 67°F. Unit
can operate to 0°F if equipped with a low ambient kit.
Suction Pressure at Compressor and
Corresponding Temp. at Saturation
Min. / Max.
57.5 psig / 92.6 psig
32.0 ºF / 55.0 ºF

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Unitary Products Group 7
2. The condenser fans are the propeller type and are
not suitable for use with ductwork in the condenser
air stream.
3. The condensing unit and the evaporator should be
positioned to minimize the number of bends in the
refrigerant piping.
4. The condensing unit should be as close to the
evaporator as practical.
5. The condensing unit should not be installed where
normal operating sounds may be objectionable.
6. The evaporator should be located within the build-
ing, either outside or inside the conditioned space.
ROOFTOP 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 condensing unit must be mounted on level sup-
ports. The supports can be channel iron beams or
wooden beams treated to reduce deterioration.
Minimums 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 section to distribute the load on the
roof. (3) Be capable of adequately supporting the con-
centrated loads at the corners. See Figure 1.
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
It is important that the units be installed on a substan-
tial base that will not settle, causing strain on the refrig-
erant lines and possible leaks. A one-piece concrete
slab with footers that extend below the frost line is rec-
ommended. The slab should not be tied to the building
foundation, as noise will telegraph.
TABLE 3: CORNER WEIGHTS & CENTER OF GRAVITY (INCHES)
Unit Model Unit Weight (Lbs.) Unit Dimensions
(Inches) A B C D Dim X Dim Y Weight
A to D Weight B to C
Shipping Operation Length Width
HF-25 1608 1658 110.46 88.46 337 412 472 386 49.7 47.7 723.5 884.5
HL-30 1730 1790 110.46 88.46 363 531 497 339 44.8 42.8 701.6 1028.4
HL-40 1961 2037 128.46 88.46 393 598 585 385 51.0 43.8 778.5 1182.5
HL-50 2470 2563 128.46 88.46 470 757 767 476 49.2 44.5 946.0 1524.0
FIGURE 1 - CORNER WEIGHTS & CENTER OF GRAVITY

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8Unitary Products Group
Concrete piers can also support ground level units.
These piers should (1) extend below the frost line, (2)
be located under each of the section's four corners,
and (3) be sized to carry the load of the corner it sup-
ports.
On either rooftop or ground level installations, rubber
padding can be applied under the unit to lessen any
transmission of vibration.
Holes are provided in the base rails for bolting the unit
to its foundation.
For ground level installations, precautions should be
taken to protect the unit from tampering and unautho-
rized persons from injury. Screws on access panels will
prevent casual tampering. Further safety precautions
such as a fenced enclosure or locking devices on the
panels may be advisable. Check local authorities for
safety regulations.
CLEARANCES
The units must be installed with sufficient clearance for
air to enter the condenser coil, for air discharge and for
servicing access. See Table 4 for clearances.
NOTE: Additional clearance is required to remove the
compressors out the side of the unit, unless a
means is available to lift the compressor out
through the top of the unit.
RIGGING
Exercise care when moving the unit. Do not remove
any crating until the unit is near the place of installation.
When preparing to move the unit, always determine the
center of gravity (see Table 3 and Figure 1) of the unit
in order to equally distribute the weight. Slings con-
nected to the compressor end of a unit will usually have
to be made shorter, so the unit will lift evenly (see
Figure 2).
Rig units by attaching chain or cable hooks to the holes
provided on the base rail. See Figure 7 for details on
rigging holes.
The length of the spreader bars must exceed the width
of the unit. Refer to Table 3 for unit weights.
Do not permit overhanging structures or shrubs
to obstruct condenser air discharge.
TABLE 4: MINIMUM CLEARANCES
Clearance Description Distance in Inches
Overhead (Top) 120
Front (Access Cover) 36
Rear (piping connections) 36
Left Side 30
Right Side 30
Bottom1
1. In all installations where snow accumulates and winter
operation is expected, additional height must be provided
to insure normal condenser airflow.
0
Spreaders, longer than the largest dimension
across the unit must be used across the top of
the unit.
Before lifting a unit, make sure that its weight is
distributed equally on the cables so that it will
lift evenly.
FIGURE 2 - TYPICAL RIGGING

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Unitary Products Group 9
NOTE: If planning to handle the 25-50 ton split with a
fork truck, 1WS0407 skid for HF-25/HL-30 and
1WS0408 skid for HL-40/-50 units will be
required.
POWER WIRING
Check the available power and the unit nameplate for
like voltage. Run the necessary number of properly
sized wires to the unit. Provide a disconnect switch (if
not included with the unit) and fusing as required.
Route the conduit through the large knockout located
on the front of the electrical box. See Table 5 for Elec-
trical Data.
The disconnect switch may be bolted to the side of the
unit but not to any of the removable panels; this would
interfere with access to the unit. Make sure that no
refrigerant lines will be punctured when mounting the
disconnect switch, and note that it must be suitable for
outdoor installation.
START-UP
PHASING
The units are properly phased at the factory. Check for
proper compressor rotation. If the fans or compressors
rotate in the wrong direction at start-up, the electrical
connection to the unit is misphased. Change the
incoming line connection phasing to obtain proper rota-
tion. (Scroll compressors operate in only one direction.
If the scroll is drawing low amperage, has similar suc-
tion and discharge pressures, or producing a high
noise level, the scroll is misphased.)
CONTROL WIRING
Route the necessary low voltage control wires from the
Simplicity™ control board to the thermostat and also
from the low voltage condensing section control box or
the terminal block inside the evaporator unit and to the
evaporator fan motor controller. Refer to Figures 3 and
4 for field wiring diagrams. A terminal block is provided
in the evaporator control box to accommodate the wir-
ing from the evaporator solenoid valves.
COMPRESSOR CRANKCASE HEATERS
The compressors are equipped with crankcase heaters
to prevent the migration of refrigerant to the compres-
sors. The heaters are 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 re-connected. This will allow
sufficient time for all liquid refrigerant to be driven out of
the compressor.
If handling a unit equipped with a 1WS skid,
length of forks must be a minimum of 96”. Fork
lengths less than 96” will not span the required
width of the skid and can cause damage to the
unit’s base rails or condenser coils.
All power and control wiring must be in accor-
dance with National and Local electrical codes.
Scroll compressors require proper rotation to
operate correctly. Units are properly phased at
the factory. Do not change the internal wiring to
make the blower condenser fans or compres-
sor rotate correctly.

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REFRIGERANT MAINS
Many service problems can be avoided by taking ade-
quate precautions to provide an internally clean and
dry system and by using procedures and materials that
conform to established standards.
Use hard drawn copper tubing where no appreciable
amount of bending around pipes or other obstructions
is necessary. If soft copper is used, care should be
taken to avoid sharp bends that may cause a restric-
tion.
Pack fiberglass insulation and a sealing material such
as permagum around refrigerant lines where they pen-
etrate a wall to reduce vibrations and to retain some
flexibility.
Support all tubing at minimum intervals with suitable
hangers, brackets or clamps.
Braze all copper-to-copper joints with Silfos-5 or equiv-
alent brazing material. Do not use soft solder.
Insulate all suction lines with a minimum of 1/2" ARMA-
FLEX or equal. Liquid lines exposed to direct sunlight
and/or high temperatures must also be insulated.
Never solder suction and liquid lines together. They
can be taped together for convenience and support
purposes, but they must be completely insulated from
each other.
The liquid and suction connections permit leak testing,
evacuation, and partial charging of the field piping and
the evaporator without disturbing the condenser coils
during initial installation.
Before beginning installation of the mains, be sure that
the unit has not developed a leak in transit. If pressure
still exists in the system, it can be assumed to be leak
free. DO NOT release the holding charge.
A filter-drier MUST be field-installed in the liquid line of
every system to prevent dirt and moisture from damag-
ing the system. Properly sized filter-driers are shipped
with each condensing section.
NOTE: Installing a filter-drier does not eliminate the
need for the proper evacuation of a system
before it is charged.
A field-installed moisture indicating sight-glass should
be installed in the liquid line(s) between the filter-drier
and the evaporator coil. The moisture indicating sight-
glass can be used to check for excess moisture in the
system or used as a visual means to verify refrigerant
charge.
All lines have a copper disc brazed over the end. Also,
if the unit does not have service valves, the holding
charge must be reclaimed to allow the installer to con-
nect piping. The temperature required to make or break
a brazed joint is sufficiently high to cause oxidation of
the copper unless an inert atmosphere is provided.
NOTE: Dry Nitrogen should flow through the system at
all times when heat is being applied and until
the joint has cooled.
TABLE 5: ELECTRICAL DATA
Unit Model
Designation
Compressor Fan Motor Unit
Ampacity
(Amps)
Max. Fuse
Size
(Amps)
Min.
Disconnect
Size
Power Supply Qty. RLA
(each) LRA (each) Power Supply HP Qty. FLA (each)
HF-25
2 208/230-3-60 2 47.1 350.0 208/230-3-60 1.25 4 4.5/4.3 124.6 150 150
4 460-3-60 2 25.0 158.0 460-3-60 1.25 4 2.15 64.9 80 70
5 575-3-60 2 19.9 125.0 575-3-60 1.25 4 1.7 51.9 70 60
HL-30
2 208/230-3-60 4 32.1 195.0 208/230-3-60 1.25 4 4.5/4.3 154.4 175 175
4 460-3-60 4 16.4 95.0 460-3-60 1.25 4 2.15 78.3 90 90
5 575-3-60 4 12.1 80.0 575-3-60 1.25 4 1.7 58.2 70 70
HL-40
2 208/230-3-60 4 42.0 239.0 208/230-3-60 1.50 4 5.8 201.7 225 225
4 460-3-60 4 19.2 125.0 460-3-60 1.50 4 2.9 93.2 110 110
5 575-3-60 4 13.8 80.0 575-3-60 1.50 4 2.2 67.5 80 80
HL-50
2 208/230-3-60 4 47.1 350.0 208/230-3-60 1.50 4 5.8 224.7 250 250
4 460-3-60 4 25.0 158.0 460-3-60 1.50 4 2.9 117.9 125 150
5 575-3-60 4 19.9 125.0 575-3-60 1.50 4 2.2 93.4 110 110

278806-BIM-A-1106
Unitary Products Group 11
Remove the evaporator holding charge and any caps
or discs on the liquid and suction connections that will
not permit a free flow of nitrogen.
NOTE: Always drill a small hole in sealing caps and
discs before unbrazing to prevent the pressure
in the line from blowing them off.
NOTE: Solenoid and hot gas bypass valves (if used)
should be opened manually or electrically dur-
ing brazing or evacuating.
The evaporator coil section is shipped with the side
panels suitable for right end piping connections when
viewed from the return air ends of the section.
Begin the refrigerant mains by installing the liquid line
from the condensing unit to the evaporator liquid con-
nection, maintaining a flow of nitrogen during all braz-
ing operations. The filter-drier and sight glass must be
located in this line, close to the evaporator. Make the
suction line connection at the evaporator and run the
line to the condensing unit.
For Units Without Service Valves - Reclaim the
refrigerant holding charge prior to opening any portion
of the system. Connect a low pressure Nitrogen source
to the suction and liquid line service ports on the con-
densing unit. Drill a small hole in the sealing disk; the
flow of Nitrogen will prevent any debris from entering
the system. Unbraze the sealing disk and prepare the
joint for connections of the main lines. Connect the
lines while maintaining a flow of Nitrogen from the liq-
uid line service port through the evaporator, back to the
condensing unit and out the suction service port.
For Units Equipped With Service Valves - Verify the
service valves are fully seated by screwing the stem
down into the valve body until it stops. Connect a low-
pressure nitrogen source to the service port on the
valve body. The flow of Nitrogen will prevent oxidation
of the copper lines during installation. Drill a small hole
in the sealing disk; the flow of Nitrogen will prevent any
debris from entering the system. Wrap the valve body
with a wet rag to prevent the valve body from overheat-
ing during the brazing process. Overheating the valve
will damage the valve seals. Ensure the valve is ade-
quately protected prior to any brazing on the valve
body. Unbraze the sealing disk and prepare the joint
for connections of the main lines. Connect the lines
while maintaining a flow of Nitrogen from the liquid line
valve service port through the evaporator, back to the
condensing unit and out the suction valve service port.
Once the brazing process is complete, leak testing
should be done on all interconnecting piping and the
evaporator before proper evacuation to 500 microns is
performed. Once the line set and evaporator section is
properly evacuated the service valves can be opened
and the condensing unit is now ready to charge with
the appropriate weight of refrigerant.
LINE SIZING
When sizing refrigerant pipe for a split-system air con-
ditioner, check the following:
1. Suction line pressure drop due to friction.
2. Liquid line pressure drop due to friction.
3. Suction line velocity for oil return.
4. Liquid line pressure drop due to vertical rise.
Tables 6 and 7 list friction losses for both the suc-
tion and liquid lines on the condensing section. For
certain piping arrangements, different sizes of suc-
tion line pipe may have to be used. The velocity of
the refrigerant vapor must always be great enough
to carry the oil back to the compressor.
Evaporator Below Condensing Section - On a split
system where the evaporator blower is located below
the condensing section, the suction line must be sized
for both pressure drop and for oil return. See Table 6.
Condensing Section Below Evaporator - When the
condensing section is located below the evaporator
blower, the liquid line must be designed for the pres-
sure drop due to both friction loss and vertical rise. See
Table 10. If the pressure drop due to vertical rise and
friction exceeds 40 psi, some refrigerant will flash
before it reaches the thermal expansion valve.
Flash gas:
1. Increases the liquid line pressure loss due to fric-
tion that in turn causes further flashing.
2. Reduces the capacity of the refrigerant control
device that starves the evaporator.
3. Erodes the seat of the refrigerant control device.
4. Causes erratic control of the refrigerant entering
the evaporator.
SERVICE VALVES
These condensing units may have service valves on
the compressor suction line and on the liquid line

278806-BIM-A-1106
12 Unitary Products Group
leaving the condenser coil or if so equipped from the
factory, if chosen as an option.
The liquid and suction line service valves have an
access port for evacuating, charging and pressure-
checking the system.
EVACUATION AND CHARGING
Determine the required weight of refrigerant using
Table 1, Physical Data and Table 8, Refrigerant Line
Charge. Table 1 includes operating charge based on
the unit plus 25 feet of refrigerant lines. Table 8
includes data required to adjust the charge for line
lengths other than 25 feet.
Connect a vacuum pump through a charging manifold
to both the liquid service port connection on the liquid
line and the suction service port connection on the suc-
tion line. Vacuum pump connection lines should be
short and no smaller than 3/8" OD.
The refrigerant mains and the evaporator may now be
evacuated. After proper evacuation and dehydration,
charge the required weight of liquid refrigerant into the
liquid access connection. After refrigerant flow slows,
start the compressor and continue to charge refrigerant
gas through the suction service port connection.
If proper equipment is not available for weighing in the
refrigerant charge, moisture indicating sight glass may
be used to aid in charging the unit.
After proper evacuation and dehydrating of the unit,
charge the unit as described above until the moisture
indicating sight glass is clear. The correct refrigerant
pressures are indicated as shown in Figures 14
through 17.
Never remove a cap from an access port
unless the valve is fully back-seated with its
valve stem in the maximum counter-clockwise
position because the refrigerant charge will be
lost. Always use a refrigeration valve wrench to
open and close these service valves.
Operating compressor with suction pressure
below 23 psi will result in overheating of the
scrolls and permanent damage to the com-
pressor drive bearing.

278806-BIM-A-1106
Unitary Products Group 13
TABLE 6: SUCTION LINES
Model Designation Nominal
Capacity (Tons) RefrigerantFlow Rate (Lbs./Min.) Copper Tubing (Inches, O.D.) Refrigerant Gas Velocity (Ft./Min.) Friction Loss (PSI/100 Ft.)
HF-25 System #1
Full Capacity 25 80 2 1/8 1945 1.2 2 5/8 1500 0.6
3 1/8 1040 0.3
Half Capacity 12.5 40 2 1/8 1110 0.5 2 5/8 750 0.2
3 1/8 520 0.1
HL-30
System #1
Full Capacity 15 47 1 3/8 2873 4.1 1 5/8 2030 1.8
2 1/8 1167 0.5
Half Capacity 7.5 23.5 1 3/8 1437 1.1 1 5/8 1015 0.5
2 1/8 850 0.2
System #2
Full Capacity 15 47 1 3/8 2873 4.1 1 5/8 2030 1.8
2 1/8 1167 0.5
Half Capacity 7.5 23.5 1 3/8 1437 1.1 1 5/8 1015 0.5
2 1/8 850 0.2
HL-40
System #1
Full Capacity 20 64 1 5/8 3120 4.3 2 1/8 1800 1.2
2 5/8 1200 0.4
Half Capacity 10 32 1 5/8 1560 1.2 2 1/8 900 0.3
2 5/8 600 0.1
System #2
Full Capacity 20 64 1 5/8 3120 4.3 2 1/8 1800 1.2
2 5/8 1200 0.4
Half Capacity 10 32 1 5/8 1560 1.2 2 1/8 1800 1.2
2 5/8 1200 0.4
HL-50
System #1
Full Capacity 25 76 1 5/8 3384 4.5 2 1/8 1945 1.2
2 5/8 1500 0.6
Half Capacity 12.5 38 1 5/8 1710 1.4 2 1/8 983 0.4
2 5/8 750 0.2
System #2
Full Capacity 25 76 1 5/8 3384 4.5 2 1/8 1945 1.2
2 5/8 1500 0.6
Half Capacity 12.5 38 1 5/8 1710 1.4 2 1/8 983 0.4
2 5/8 750 0.2

278806-BIM-A-1106
14 Unitary Products Group
TABLE 7: LIQUID LINES
Model Designation Nominal Capacity
(Tons)
Refrigerant
Flow Rate
(Lbs./Min.)
Copper Tubing
(Inches, O.D.)
Refrigerant
Liquid Velocity
(Ft./Min.)
Friction Loss
(PSI/100 Ft.)
HF-25 System #1 Full Capacity 25 80 5/8 500 14.2 7/8 265 3.4
1 1/8 156 1.0
HL-30
System #1 Full Capacity 15 47 5/8 330 7.9 7/8 159 1.4
1 1/8 100 0.8
System #2 Full Capacity 15 47 5/8 330 7.9 7/8 159 1.4
1 1/8 100 0.8
HL-40
System #1 Full Capacity 20 64 5/8 440 13.2 7/8 212 2.3
1 1/8 90 0.6
System #2 Full Capacity 20 64 5/8 440 13.2 7/8 212 2.3
1 1/8 90 0.6
HL-50
System #1 Full Capacity 25 76 5/8 400 8.5 7/8 265 3.4
1 1/8 156 1.0
System #2 Full Capacity 25 76 5/8 400 8.5 7/8 265 3.4
1 1/8 156 1.0
TABLE 8: R-22 LINE CHARGE1
LINE SET, O.D.2O.D., (INCHES) REFRIGERANT, LB/FT
LIQUID 7/8 0.236
SUCTION 1 5/8 0.019
2 1/8 0.033
1. Charges based on 40ºF suction temperature and 105ºF liquid temperature.
2. Type “L” copper tubing.
NOTE: Add the operating charge of the condensing unit, evaporator coil and 25 feet of interconnecting piping to any additional piping
refrigerant charge required (determined from Table 8) for total system charge.

278806-BIM-A-1106
Unitary Products Group 15
FIGURE 3 - TYPICAL FIELD WIRING DIAGRAM - HF-25 UNIT
Note 1
Note 1. See page 16 and 17 for details
on wiring HF/HLmodels to non LF/LL
indoor models.

278806-BIM-A-1106
16 Unitary Products Group
FIGURE 4 - TYPICAL FIELD WIRING DIAGRAM - HL-30, -40, -50 UNITS

278806-BIM-A-1106
Unitary Products Group 17
FIGURE 5 - TYPICAL LIQUID LINE SOLENOID WIRING
Standard Terminal Block on LF/LL models. On non
LF/LL models isolation relays must be installed to
avoid overloadingon 75 VA transformer on
condensingunit.
Non LF/LL units may not include any or all ofthe
components required to wire the unit use the
diagram as general reference only.
Primary side oftransformer
connect to line side ofpower
Primary side oftransformer
connect to line side ofpower

278806-BIM-A-1106
18 Unitary Products Group
PIPING AND ELECTRICAL CONNECTIONS
Piping connections are made from the rear of the unit.
Connections can be made directly to the suction and
liquid piping or if so equipped to the optional suction
and liquid line service valves.
With the piping connections being made at the rear of
the unit, piping can be routed to the unit from the left or
right side.
Electrical connections for power and control wiring is
made from the front of the unit, left of the electrical con-
trol box access. See Tables 10, 11 and 12 and Figures
7 thru 11 for piping sizes and electrical knockout
details.
FIGURE 6 - HF/HL UNIT DIMENSIONS
E
D
A
FRONT
B
REAR
RIGHT
LEFT
C
F
G
H
TABLE 9: UNIT DIMENSIONS (INCHES)
MODEL ABCDEFGH
HF-25 110.5 88.5 37.5 32.8 31.0 46.1 37.1 23.6
HL-30 110.5 88.5 37.5 32.8 31.0 46.1 37.1 23.6
HL-40 128.5 88.5 37.5 41.8 40.0 46.1 37.1 23.6
HL-50 128.5 88.5 57.7 41.8 40.0 46.1 37.1 23.6

278806-BIM-A-1106
Unitary Products Group 19
FIGURE 7 - 25, 30 & 40 TON POWER AND CONTROL WIRING CONNECTIONS
Control Wiring
Power Wiring
FIGURE 8 - 50 TON POWER AND CONTROL WIRING CONNECTIONS
Control Wiring
Power Wiring

278806-BIM-A-1106
20 Unitary Products Group
PIPING AND ELECTRICAL CONNECTION SIZES
TABLE 10: PIPING AND ELECTRICAL
CONNECTION SIZES (25T) (INCHES)
CONNECTION ENTRY SIZE
SUCTION LINE SYS #1 1-5/8 OD
LIQUID LINE SYS #1 7/8 OD
POWER WIRING KNOCKOUT SEE TABLE 12
CONTROL WIRING 7/8 HOLE
TABLE 11: PIPING AND ELECTRICAL
CONNECTION SIZES
(30/40/50T) (INCHES)
CONNECTION ENTRY SIZE
SUCTION LINE SYS #1 1-5/8 OD
LIQUID LINE SYS #1 7/8 OD
SUCTION LINE SYS #2 1-5/8 OD
LIQUID LINE SYS #2 7/8 OD
POWER WIRING KNOCKOUT SEE TABLE 12
CONTROL WIRING 7/8 HOLE
TABLE 12: ELECTRICAL POWER KNOCKOUT SIZES (INCHES)
CONNECTION ENTRY 25T/230V 25T/460-575V 30-40-50T/230V 30-40-50T/460-575V
EPOWER WIRING 2” 1-1/2” 2-1/2” 1-1/2”
FIGURE 9 - 25 TON PIPING CONNECTIONS
Liquid Suction